xref: /onnv-gate/usr/src/cmd/dfs.cmds/sharemgr/commands.c (revision 3082:6bb20c63d0cc)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <getopt.h>
#include <utmpx.h>
#include <pwd.h>
#include <auth_attr.h>
#include <secdb.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <errno.h>

#include <libshare.h>
#include "sharemgr.h"
#include <libscf.h>
#include <libxml/tree.h>
#include <libintl.h>

static char *sa_get_usage(sa_usage_t);

/*
 * Implementation of the common sub-commands supported by sharemgr.
 * A number of helper functions are also included.
 */

/*
 * has_protocol(group, proto)
 *	If the group has an optionset with the specified protocol,
 *	return true (1) otherwise false (0).
 */
static int
has_protocol(sa_group_t group, char *protocol)
{
	sa_optionset_t optionset;
	int result = 0;

	optionset = sa_get_optionset(group, protocol);
	if (optionset != NULL) {
	    result++;
	}
	return (result);
}

/*
 * add_list(list, item)
 *	Adds a new list member that points to item to the list.
 *	If list is NULL, it starts a new list.  The function returns
 *	the first member of the list.
 */
struct list *
add_list(struct list *listp, void *item, void *data)
{
	struct list *new, *tmp;

	new = malloc(sizeof (struct list));
	if (new != NULL) {
	    new->next = NULL;
	    new->item = item;
	    new->itemdata = data;
	} else {
	    return (listp);
	}

	if (listp == NULL)
	    return (new);

	for (tmp = listp; tmp->next != NULL; tmp = tmp->next) {
		/* get to end of list */
	}
	tmp->next = new;
	return (listp);
}

/*
 * free_list(list)
 *	Given a list, free all the members of the list;
 */
static void
free_list(struct list *listp)
{
	struct list *tmp;
	while (listp != NULL) {
	    tmp = listp;
	    listp = listp->next;
	    free(tmp);
	}
}

/*
 * check_authorization(instname, which)
 *
 * Checks to see if the specific type of authorization in which is
 * enabled for the user in this SMF service instance.
 */

static int
check_authorization(char *instname, int which)
{
	scf_handle_t *handle = NULL;
	scf_simple_prop_t *prop = NULL;
	char svcstring[SA_MAX_NAME_LEN + sizeof (SA_SVC_FMRI_BASE) + 1];
	char *authstr = NULL;
	ssize_t numauths;
	int ret = 1;
	uid_t uid;
	struct passwd *pw = NULL;

	uid = getuid();
	pw = getpwuid(uid);
	if (pw == NULL)
	    ret = 0;

	if (ret == 1) {
	    /* since names  are restricted to SA_MAX_NAME_LEN won't overflow */
	    (void) snprintf(svcstring, sizeof (svcstring),
				"%s:%s", SA_SVC_FMRI_BASE, instname);
	    handle = scf_handle_create(SCF_VERSION);
	    if (handle != NULL) {
		if (scf_handle_bind(handle) == 0) {
		    switch (which) {
		    case SVC_SET:
			prop = scf_simple_prop_get(handle, svcstring,
							"general",
							SVC_AUTH_VALUE);
			break;
		    case SVC_ACTION:
			prop = scf_simple_prop_get(handle, svcstring,
							"general",
							SVC_AUTH_ACTION);
			break;
		    }
		}
	    }
	}
	/* make sure we have an authorization string property */
	if (prop != NULL) {
	    int i;
	    numauths = scf_simple_prop_numvalues(prop);
	    for (ret = 0, i = 0; i < numauths; i++) {
		authstr = scf_simple_prop_next_astring(prop);
		if (authstr != NULL) {
		    /* check if this user has one of the strings */
		    if (chkauthattr(authstr, pw->pw_name)) {
			ret = 1;
			break;
		    }
		}
	    }
	    endauthattr();
	    scf_simple_prop_free(prop);
	} else {
	    /* no authorization string defined */
	    ret = 0;
	}
	if (handle != NULL)
	    scf_handle_destroy(handle);
	return (ret);
}

/*
 * check_authorizations(instname, flags)
 *
 * check all the needed authorizations for the user in this service
 * instance. Return value of 1(true) or 0(false) indicates whether
 * there are authorizations for the user or not.
 */

static int
check_authorizations(char *instname, int flags)
{
	int ret1 = 0;
	int ret2 = 0;
	int ret;

	if (flags & SVC_SET)
	    ret1 = check_authorization(instname, SVC_SET);
	if (flags & SVC_ACTION)
	    ret2 = check_authorization(instname, SVC_ACTION);
	switch (flags) {
	case SVC_ACTION:
	    ret = ret2;
	    break;
	case SVC_SET:
	    ret = ret1;
	    break;
	case SVC_ACTION|SVC_SET:
	    ret = ret1 & ret2;
	    break;
	default:
	    /* if not flags set, we assume we don't need authorizations */
	    ret = 1;
	}
	return (ret);
}

/*
 * enable_group(group, updateproto)
 *
 * enable all the shares in the specified group. This is a helper for
 * enable_all_groups in order to simplify regular and subgroup (zfs)
 * disabling. Group has already been checked for non-NULL.
 */

static void
enable_group(sa_group_t group, char *updateproto)
{
	sa_share_t share;

	for (share = sa_get_share(group, NULL);
	    share != NULL;
	    share = sa_get_next_share(share)) {
	    if (updateproto != NULL)
		(void) sa_update_legacy(share, updateproto);
	    (void) sa_enable_share(share, NULL);
	}
}

/*
 * enable_all_groups(list, setstate, online, updateproto)
 *	Given a list of groups, enable each one found.  If updateproto
 *	is not NULL, then update all the shares for the protocol that
 *	was passed in.
 */
static int
enable_all_groups(struct list *work, int setstate, int online,
	char *updateproto)
{
	int ret = SA_OK;
	char instance[SA_MAX_NAME_LEN + sizeof (SA_SVC_FMRI_BASE) + 1];
	char *state;
	char *name;
	char *zfs = NULL;
	sa_group_t group;
	sa_group_t subgroup;

	while (work != NULL && ret == SA_OK) {
	    group = (sa_group_t)work->item;
	    /* if itemdata != NULL then a single share */
	    if (work->itemdata != NULL) {
		ret = sa_enable_share((sa_share_t)work->itemdata, NULL);
	    }
	    if (setstate)
		ret = sa_set_group_attr(group, "state",
					"enabled");
	    if (ret == SA_OK) {
		/* if itemdata == NULL then the whole group */
		if (work->itemdata == NULL) {
		    zfs = sa_get_group_attr(group, "zfs");
			/*
			 * if the share is managed by ZFS, don't
			 * update any of the protocols since ZFS is
			 * handling this.  updateproto will contain
			 * the name of the protocol that we want to
			 * update legacy files for.
			 */
		    enable_group(group, zfs == NULL ? updateproto : NULL);
		    for (subgroup = sa_get_sub_group(group); subgroup != NULL;
			subgroup = sa_get_next_group(subgroup)) {
			/* never update legacy for ZFS subgroups */
			enable_group(subgroup, NULL);
		    }
		}
		if (online) {
		    zfs = sa_get_group_attr(group, "zfs");
		    name = sa_get_group_attr(group, "name");
		    if (name != NULL) {
			if (zfs == NULL) {
			    (void) snprintf(instance, sizeof (instance),
						"%s:%s",
						SA_SVC_FMRI_BASE, name);
			    state = smf_get_state(instance);
			    if (state == NULL ||
				strcmp(state, "online") != 0) {
				(void) smf_enable_instance(instance, 0);
				free(state);
			    }
			} else {
			    sa_free_attr_string(zfs);
			    zfs = NULL;
			}
			if (name != NULL)
			    sa_free_attr_string(name);
		    }
		}
		work = work->next;
	    }
	}
	if (ret == SA_OK) {
	    ret = sa_update_config();
	}
	return (ret);
}

/*
 * chk_opt(optlistp, security, proto)
 *
 * Do a sanity check on the optlist provided for the protocol.  This
 * is a syntax check and verification that the property is either a
 * general or specific to a names optionset.
 */

static int
chk_opt(struct options *optlistp, int security, char *proto)
{
	struct options *optlist;
	char *sep = "";
	int notfirst = 0;
	int ret;

	for (optlist = optlistp; optlist != NULL; optlist = optlist->next) {
	    char *optname;

	    optname = optlist->optname;
	    ret = OPT_ADD_OK;
	    /* extract property/value pair */
	    if (sa_is_security(optname, proto)) {
		if (!security)
		    ret = OPT_ADD_SECURITY;
	    } else {
		if (security)
		    ret = OPT_ADD_PROPERTY;
	    }
	    if (ret != OPT_ADD_OK) {
		if (notfirst == 0)
		    (void) printf(gettext("Property syntax error: "));
		switch (ret) {
		case OPT_ADD_SYNTAX:
		    (void) printf(gettext("%ssyntax error: %s"),
				    sep, optname);
		    sep = ", ";
		    break;
		case OPT_ADD_SECURITY:
		    (void) printf(gettext("%s%s requires -S"),
				    optname, sep);
		    sep = ", ";
		    break;
		case OPT_ADD_PROPERTY:
		    (void) printf(gettext("%s%s not supported with -S"),
				    optname, sep);
		    sep = ", ";
		    break;
		}
		notfirst++;
	    }
	}
	if (notfirst) {
	    (void) printf("\n");
	    ret = SA_SYNTAX_ERR;
	}
	return (ret);
}

/*
 * free_opt(optlist)
 *	Free the specified option list.
 */
static void
free_opt(struct options *optlist)
{
	struct options *nextopt;
	while (optlist != NULL) {
		nextopt = optlist->next;
		free(optlist);
		optlist = nextopt;
	}
}

/*
 * check property list for valid properties
 * A null value is a remove which is always valid.
 */
static int
valid_options(struct options *optlist, char *proto, void *object, char *sec)
{
	int ret = SA_OK;
	struct options *cur;
	sa_property_t prop;
	sa_optionset_t parent = NULL;

	if (object != NULL) {
	    if (sec == NULL)
		parent = sa_get_optionset(object, proto);
	    else
		parent = sa_get_security(object, sec, proto);
	}

	for (cur = optlist; cur != NULL; cur = cur->next) {
	    if (cur->optvalue != NULL) {
		prop = sa_create_property(cur->optname, cur->optvalue);
		if (prop == NULL)
		    ret = SA_NO_MEMORY;
		if (ret != SA_OK ||
		    (ret = sa_valid_property(parent, proto, prop)) != SA_OK) {
		    (void) printf(gettext("Could not add property %s: %s\n"),
					cur->optname,
					sa_errorstr(ret));
		}
		(void) sa_remove_property(prop);
	    }
	}
	return (ret);
}

/*
 * add_optionset(group, optlist, protocol, *err)
 *	Add the options in optlist to an optionset and then add the optionset
 *	to the group.
 *
 *	The return value indicates if there was a "change" while errors are
 *	returned via the *err parameters.
 */
static int
add_optionset(sa_group_t group, struct options *optlist, char *proto, int *err)
{
	sa_optionset_t optionset;
	int ret = SA_OK;
	int result = 0;

	optionset = sa_get_optionset(group, proto);
	if (optionset == NULL) {
	    optionset = sa_create_optionset(group, proto);
	    result = 1; /* adding a protocol is a change */
	}
	if (optionset != NULL) {
	    while (optlist != NULL) {
		sa_property_t prop;
		prop = sa_get_property(optionset, optlist->optname);
		if (prop == NULL) {
			/*
			 * add the property, but only if it is
			 * a non-NULL or non-zero length value
			 */
		    if (optlist->optvalue != NULL) {
			prop = sa_create_property(optlist->optname,
						    optlist->optvalue);
			if (prop != NULL) {
			    ret = sa_valid_property(optionset, proto, prop);
			    if (ret != SA_OK) {
				(void) sa_remove_property(prop);
				(void) printf(gettext("Could not add property "
							"%s: %s\n"),
						optlist->optname,
						sa_errorstr(ret));
			    }
			}
			if (ret == SA_OK) {
			    ret = sa_add_property(optionset, prop);
			    if (ret != SA_OK) {
				(void) printf(gettext("Could not add property"
							" %s: %s\n"),
						optlist->optname,
						sa_errorstr(ret));
			    } else {
				/* there was a change */
				result = 1;
			    }
			}
		    }
		} else {
		    ret = sa_update_property(prop, optlist->optvalue);
		    /* should check to see if value changed */
		    if (ret != SA_OK) {
			(void) printf(gettext("Could not update "
						"property %s: %s\n"),
					optlist->optname,
					sa_errorstr(ret));
		    } else {
			result = 1;
		    }
		}
		optlist = optlist->next;
	    }
	    ret = sa_commit_properties(optionset, 0);
	}
	if (err != NULL)
	    *err = ret;
	return (result);
}

/*
 * sa_create(flags, argc, argv)
 *	create a new group
 *	this may or may not have a protocol associated with it.
 *	No protocol means "all" protocols in this case.
 */
static int
sa_create(int flags, int argc, char *argv[])
{
	char *groupname;

	sa_group_t group;
	int verbose = 0;
	int dryrun = 0;
	int c;
	char *protocol = NULL;
	int ret = SA_OK;
	struct options *optlist = NULL;
	int err = 0;
	int auth;

	while ((c = getopt(argc, argv, "?hvnP:p:")) != EOF) {
	    switch (c) {
	    case 'v':
		verbose++;
		break;
	    case 'n':
		dryrun++;
		break;
	    case 'P':
		protocol = optarg;
		if (!sa_valid_protocol(protocol)) {
		    (void) printf(gettext("Invalid protocol specified: %s\n"),
					protocol);
		    return (SA_INVALID_PROTOCOL);
		}
		break;
	    case 'p':
		ret = add_opt(&optlist, optarg, 0);
		switch (ret) {
		case OPT_ADD_SYNTAX:
		    (void) printf(gettext("Property syntax error for "
						"property: %s\n"),
				    optarg);
		    return (SA_SYNTAX_ERR);
		case OPT_ADD_SECURITY:
		    (void) printf(gettext("Security properties need "
					"to be set with set-security: %s\n"),
				    optarg);
		    return (SA_SYNTAX_ERR);
		default:
		    break;
		}

		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_CREATE));
		return (0);
	    }
	}

	if (optind >= argc) {
	    (void) printf(gettext("usage: %s\n"), sa_get_usage(USAGE_CREATE));
	    (void) printf(gettext("\tgroup must be specified.\n"));
	    return (SA_BAD_PATH);
	}

	if ((optind + 1) < argc) {
	    (void) printf(gettext("usage: %s\n"), sa_get_usage(USAGE_CREATE));
	    (void) printf(gettext("\textraneous group(s) at end\n"));
	    return (SA_SYNTAX_ERR);
	}

	if (protocol == NULL && optlist != NULL) {
	    /* lookup default protocol */
	    (void) printf(gettext("usage: %s\n"), sa_get_usage(USAGE_CREATE));
	    (void) printf(gettext("\tprotocol must be specified "
				"with properties\n"));
	    return (SA_INVALID_PROTOCOL);
	}

	if (optlist != NULL)
	    ret = chk_opt(optlist, 0, protocol);
	if (ret == OPT_ADD_SECURITY) {
	    (void) printf(gettext("Security properties not "
				"supported with create\n"));
	    return (SA_SYNTAX_ERR);
	}

	/*
	 * if a group already exists, we can only add a new protocol
	 * to it and not create a new one or add the same protocol
	 * again.
	 */

	groupname = argv[optind];

	auth = check_authorizations(groupname, flags);

	group = sa_get_group(groupname);
	if (group != NULL) {
	    /* group exists so must be a protocol add */
	    if (protocol != NULL) {
		if (has_protocol(group, protocol)) {
		    (void) printf(gettext("Group \"%s\" already exists"
						" with protocol %s\n"),
					groupname, protocol);
		    ret = SA_DUPLICATE_NAME;
		}
	    } else {
		/* must add new protocol */
		(void) printf(gettext("Group already exists and no protocol"
					" specified.\n"));
		ret = SA_DUPLICATE_NAME;
	    }
	} else {
		/*
		 * is it a valid name? Must comply with SMF instance
		 * name restrictions.
		 */
	    if (!sa_valid_group_name(groupname)) {
		ret = SA_INVALID_NAME;
		(void) printf(gettext("Invalid group name: %s\n"), groupname);
	    }
	}
	if (ret == SA_OK) {
	    /* check protocol vs optlist */
	    if (optlist != NULL) {
		/* check options, if any, for validity */
		ret = valid_options(optlist, protocol, group, NULL);
	    }
	}
	if (ret == SA_OK && !dryrun) {
	    if (group == NULL) {
		group = sa_create_group((char *)groupname, &err);
	    }
	    if (group != NULL) {
		sa_optionset_t optionset;
		if (optlist != NULL) {
		    (void) add_optionset(group, optlist, protocol, &ret);
		} else if (protocol != NULL) {
		    optionset = sa_create_optionset(group, protocol);
		    if (optionset == NULL)
			ret = SA_NO_MEMORY;
		} else if (protocol == NULL) {
		    char **protolist;
		    int numprotos, i;
		    numprotos = sa_get_protocols(&protolist);
		    for (i = 0; i < numprotos; i++) {
			optionset = sa_create_optionset(group, protolist[i]);
		    }
		    if (protolist != NULL)
			free(protolist);
		}
		/*
		 * we have a group and legal additions
		 */
		if (ret == SA_OK) {
			/*
			 * commit to configuration for protocols that
			 * need to do block updates. For NFS, this
			 * doesn't do anything but it will be run for
			 * all protocols that implement the
			 * appropriate plugin.
			 */
		    ret = sa_update_config();
		} else {
		    if (group != NULL)
			(void) sa_remove_group(group);
		}
	    } else {
		ret = err;
		(void) printf(gettext("Could not create group: %s\n"),
			sa_errorstr(ret));
	    }
	}
	if (dryrun && ret == SA_OK && !auth && verbose) {
	    (void) printf(gettext("Command would fail: %s\n"),
			sa_errorstr(SA_NO_PERMISSION));
	    ret = SA_NO_PERMISSION;
	}
	free_opt(optlist);
	return (ret);
}

/*
 * group_status(group)
 *
 * return the current status (enabled/disabled) of the group.
 */

static char *
group_status(sa_group_t group)
{
	char *state;
	int enabled = 0;

	state = sa_get_group_attr(group, "state");
	if (state != NULL) {
	    if (strcmp(state, "enabled") == 0) {
		enabled = 1;
	    }
	    sa_free_attr_string(state);
	}
	return (enabled ? gettext("enabled") : gettext("disabled"));
}

/*
 * sa_delete(flags, argc, argv)
 *
 *	Delete a group.
 */

static int
sa_delete(int flags, int argc, char *argv[])
{
	char *groupname;
	sa_group_t group;
	sa_share_t share;
	int verbose = 0;
	int dryrun = 0;
	int force = 0;
	int c;
	char *protocol = NULL;
	char *sectype = NULL;
	int ret = SA_OK;
	int auth;

	while ((c = getopt(argc, argv, "?hvnP:fS:")) != EOF) {
	    switch (c) {
	    case 'v':
		verbose++;
		break;
	    case 'n':
		dryrun++;
		break;
	    case 'P':
		protocol = optarg;
		if (!sa_valid_protocol(protocol)) {
		    (void) printf(gettext("Invalid protocol specified: %s\n"),
				    protocol);
		    return (SA_INVALID_PROTOCOL);
		}
		break;
	    case 'S':
		sectype = optarg;
		break;
	    case 'f':
		force++;
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_DELETE));
		return (0);
	    }
	}

	if (optind >= argc) {
	    (void) printf(gettext("usage: %s\n"), sa_get_usage(USAGE_DELETE));
	    (void) printf(gettext("\tgroup must be specified.\n"));
	    return (SA_SYNTAX_ERR);
	}

	if ((optind + 1) < argc) {
	    (void) printf(gettext("usage: %s\n"), sa_get_usage(USAGE_DELETE));
	    (void) printf(gettext("\textraneous group(s) at end\n"));
	    return (SA_SYNTAX_ERR);
	}

	if (sectype != NULL && protocol == NULL) {
	    (void) printf(gettext("usage: %s\n"), sa_get_usage(USAGE_DELETE));
	    (void) printf(gettext("\tsecurity requires protocol to be "
					"specified.\n"));
	    return (SA_SYNTAX_ERR);
	}

	/*
	 * Determine if the group already exists since it must in
	 * order to be removed.
	 *
	 * We can delete when:
	 *
	 *	- group is empty
	 *	- force flag is set
	 *	- if protocol specified, only delete the protocol
	 */

	groupname = argv[optind];
	group = sa_get_group(groupname);
	if (group == NULL) {
		ret = SA_NO_SUCH_GROUP;
	} else {
	    auth = check_authorizations(groupname, flags);
	    if (protocol == NULL) {
		share = sa_get_share(group, NULL);
		if (share != NULL)
		    ret = SA_BUSY;
		if (share == NULL || (share != NULL && force == 1)) {
		    ret = SA_OK;
		    if (!dryrun) {
			while (share != NULL) {
			    sa_share_t next_share;
			    next_share = sa_get_next_share(share);
				/*
				 * need to do the disable of each
				 * share, but don't actually do
				 * anything on a dryrun.
				 */
			    ret = sa_disable_share(share, NULL);
			    ret = sa_remove_share(share);
			    share = next_share;
			}
			ret = sa_remove_group(group);
		    }
		}
		/* commit to configuration if not a dryrun */
		if (!dryrun && ret == SA_OK) {
		    ret = sa_update_config();
		}
	    } else {
		/* a protocol delete */
		sa_optionset_t optionset;
		sa_security_t security;
		if (sectype != NULL) {
		    /* only delete specified security */
		    security = sa_get_security(group, sectype, protocol);
		    if (security != NULL && !dryrun) {
			ret = sa_destroy_security(security);
		    } else {
			ret = SA_INVALID_PROTOCOL;
		    }
		} else {
		    optionset = sa_get_optionset(group, protocol);
		    if (optionset != NULL && !dryrun) {
			/* have an optionset with protocol to delete */
			ret = sa_destroy_optionset(optionset);
			/*
			 * now find all security sets for the protocol
			 * and remove them. Don't remove other
			 * protocols.
			 */
			for (security = sa_get_security(group, NULL, NULL);
			    ret == SA_OK && security != NULL;
			    security = sa_get_next_security(security)) {
			    char *secprot;

			    secprot = sa_get_security_attr(security, "type");
			    if (secprot != NULL &&
				strcmp(secprot, protocol) == 0)
				ret = sa_destroy_security(security);
			    if (secprot != NULL)
				sa_free_attr_string(secprot);
			}
		    } else {
			if (!dryrun)
			    ret = SA_INVALID_PROTOCOL;
		    }
		}
	    }
	}
	if (ret != SA_OK) {
	    (void) printf(gettext("Could not delete group: %s\n"),
				sa_errorstr(ret));
	} else if (dryrun && !auth && verbose) {
	    (void) printf(gettext("Command would fail: %s\n"),
			sa_errorstr(SA_NO_PERMISSION));
	}
	return (ret);
}

/*
 * strndupr(*buff, str, buffsize)
 *
 * used with small strings to duplicate and possibly increase the
 * buffer size of a string.
 */
static char *
strndupr(char *buff, char *str, int *buffsize)
{
	int limit;
	char *orig_buff = buff;

	if (buff == NULL) {
	    buff = (char *)malloc(64);
	    if (buff == NULL)
		return (NULL);
	    *buffsize = 64;
	    buff[0] = '\0';
	}
	limit = strlen(buff) + strlen(str) + 1;
	if (limit > *buffsize) {
	    limit = *buffsize = *buffsize + ((limit / 64) + 64);
	    buff = realloc(buff, limit);
	}
	if (buff != NULL) {
	    (void) strcat(buff, str);
	} else {
	    /* if it fails, fail it hard */
	    if (orig_buff != NULL)
		free(orig_buff);
	}
	return (buff);
}

/*
 * group_proto(group)
 *
 * return a string of all the protocols (space separated) associated
 * with this group.
 */

static char *
group_proto(sa_group_t group)
{
	sa_optionset_t optionset;
	char *proto;
	char *buff = NULL;
	int buffsize = 0;
	int addspace = 0;
	/*
	 * get the protocol list by finding the optionsets on this
	 * group and extracting the type value. The initial call to
	 * strndupr() initailizes buff.
	 */
	buff = strndupr(buff, "", &buffsize);
	if (buff != NULL) {
	    for (optionset = sa_get_optionset(group, NULL);
		optionset != NULL && buff != NULL;
		optionset = sa_get_next_optionset(optionset)) {
		/*
		 * extract out the protocol type from this optionset
		 * and append it to the buffer "buff". strndupr() will
		 * reallocate space as necessay.
		 */
		proto = sa_get_optionset_attr(optionset, "type");
		if (proto != NULL) {
		    if (addspace++)
			buff = strndupr(buff, " ", &buffsize);
		    buff = strndupr(buff, proto, &buffsize);
		    sa_free_attr_string(proto);
		}
	    }
	}
	return (buff);
}

/*
 * sa_list(flags, argc, argv)
 *
 * implements the "list" subcommand to list groups and optionally
 * their state and protocols.
 */

static int
sa_list(int flags, int argc, char *argv[])
{
	sa_group_t group;
	int verbose = 0;
	int c;
	char *protocol = NULL;
#ifdef lint
	flags = flags;
#endif

	while ((c = getopt(argc, argv, "?hvP:")) != EOF) {
	    switch (c) {
	    case 'v':
		verbose++;
		break;
	    case 'P':
		protocol = optarg;
		if (!sa_valid_protocol(protocol)) {
		    (void) printf(gettext("Invalid protocol specified:"
					    "%s\n"),
					protocol);
		    return (SA_INVALID_PROTOCOL);
		}
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"), sa_get_usage(USAGE_LIST));
		return (0);
	    }
	}

	for (group = sa_get_group(NULL); group != NULL;
	    group = sa_get_next_group(group)) {
	    char *name;
	    char *proto;
	    if (protocol == NULL || has_protocol(group, protocol)) {
		name = sa_get_group_attr(group, "name");
		if (name != NULL && (verbose > 1 || name[0] != '#')) {
		    (void) printf("%s", (char *)name);
		    if (verbose) {
			/*
			 * need the list of protocols
			 * and current status once
			 * available.
			 */
			(void) printf("\t%s", group_status(group));
			proto = group_proto(group);
			if (proto != NULL) {
			    (void) printf("\t%s", (char *)proto);
			    free(proto);
			}
		    }
		    (void) printf("\n");
		}
		if (name != NULL)
		    sa_free_attr_string(name);
	    }
	}
	return (0);
}

/*
 * out_properties(optionset, proto, sec)
 *
 * Format the properties and encode the protocol and optional named
 * optionset into the string.
 *
 * format is protocol[:name]=(property-list)
 */

static void
out_properties(sa_optionset_t optionset, char *proto, char *sec)
{
	char *type;
	char *value;
	int spacer;
	sa_property_t prop;

	if (sec == NULL) {
	    (void) printf(" %s=(", proto ? proto : gettext("all"));
	} else {
	    (void) printf(" %s:%s=(", proto ? proto : gettext("all"), sec);
	}

	for (spacer = 0, prop = sa_get_property(optionset, NULL);
	    prop != NULL; prop = sa_get_next_property(prop)) {

		/*
		 * extract the property name/value and output with
		 * appropriate spacing. I.e. no prefixed space the
		 * first time through but a space on subsequent
		 * properties.
		 */
	    type = sa_get_property_attr(prop, "type");
	    value = sa_get_property_attr(prop, "value");
	    if (type != NULL) {
		(void) printf("%s%s=", spacer ? " " : "",	type);
		spacer = 1;
		if (value != NULL)
		    (void) printf("\"%s\"", value);
		else
		    (void) printf("\"\"");
	    }
	    if (type != NULL)
		sa_free_attr_string(type);
	    if (value != NULL)
		sa_free_attr_string(value);
	}
	(void) printf(")");
}

/*
 * show_properties(group, protocol, prefix)
 *
 * print the properties for a group. If protocol is NULL, do all
 * protocols otherwise only the specified protocol. All security
 * (named groups specific to the protocol) are included.
 *
 * The "prefix" is always applied. The caller knows whether it wants
 * some type of prefix string (white space) or not.  Once the prefix
 * has been output, it is reduced to the zero length string for the
 * remainder of the property output.
 */

static void
show_properties(sa_group_t group, char *protocol, char *prefix)
{
	sa_optionset_t optionset;
	sa_security_t security;
	char *value;
	char *secvalue;

	if (protocol != NULL) {
	    optionset = sa_get_optionset(group, protocol);
	    if (optionset != NULL) {
		(void) printf("%s", prefix);
		prefix = "";
		out_properties(optionset, protocol, NULL);
	    }
	    security = sa_get_security(group, protocol, NULL);
	    if (security != NULL) {
		(void) printf("%s", prefix);
		prefix = "";
		out_properties(security, protocol, NULL);
	    }
	} else {
	    for (optionset = sa_get_optionset(group, protocol);
		optionset != NULL;
		optionset = sa_get_next_optionset(optionset)) {

		value = sa_get_optionset_attr(optionset, "type");
		(void) printf("%s", prefix);
		prefix = "";
		out_properties(optionset, value, 0);
		if (value != NULL)
		    sa_free_attr_string(value);
	    }
	    for (security = sa_get_security(group, NULL, protocol);
		security != NULL;
		security = sa_get_next_security(security)) {

		value = sa_get_security_attr(security, "type");
		secvalue = sa_get_security_attr(security, "sectype");
		(void) printf("%s", prefix);
		prefix = "";
		out_properties(security, value, secvalue);
		if (value != NULL)
		    sa_free_attr_string(value);
		if (secvalue != NULL)
		    sa_free_attr_string(secvalue);
	    }
	}
}

/*
 * show_group(group, verbose, properties, proto, subgroup)
 *
 * helper function to show the contents of a group.
 */

static void
show_group(sa_group_t group, int verbose, int properties, char *proto,
		char *subgroup)
{
	sa_share_t share;
	char *groupname;
	char *sharepath;
	char *resource;
	char *description;
	char *type;
	char *zfs = NULL;
	int iszfs = 0;

	groupname = sa_get_group_attr(group, "name");
	if (groupname != NULL) {
	    if (proto != NULL && !has_protocol(group, proto)) {
		sa_free_attr_string(groupname);
		return;
	    }
		/*
		 * check to see if the group is managed by ZFS. If
		 * there is an attribute, then it is. A non-NULL zfs
		 * variable will trigger the different way to display
		 * and will remove the transient property indicator
		 * from the output.
		 */
	    zfs = sa_get_group_attr(group, "zfs");
	    if (zfs != NULL) {
		iszfs = 1;
		sa_free_attr_string(zfs);
	    }
	    share = sa_get_share(group, NULL);
	    if (subgroup == NULL)
		(void) printf("%s", groupname);
	    else
		(void) printf("    %s/%s", subgroup, groupname);
	    if (properties) {
		show_properties(group, proto, "");
	    }
	    (void) printf("\n");
	    if (strcmp(groupname, "zfs") == 0) {
		sa_group_t zgroup;

		for (zgroup = sa_get_sub_group(group); zgroup != NULL;
		    zgroup = sa_get_next_group(zgroup)) {
		    show_group(zgroup, verbose, properties, proto, "zfs");
		}
		sa_free_attr_string(groupname);
		return;
	    }
		/*
		 * have a group, so list the contents. Resource and
		 * description are only listed if verbose is set.
		 */
	    for (share = sa_get_share(group, NULL); share != NULL;
		share = sa_get_next_share(share)) {
		sharepath = sa_get_share_attr(share, "path");
		if (sharepath != NULL) {
		    if (verbose) {
			resource = sa_get_share_attr(share, "resource");
			description = sa_get_share_description(share);
			type = sa_get_share_attr(share, "type");
			if (type != NULL && !iszfs &&
				strcmp(type, "transient") == 0)
			    (void) printf("\t* ");
			else
			    (void) printf("\t  ");
			if (resource != NULL && strlen(resource) > 0) {
			    (void) printf("%s=%s", resource, sharepath);
			} else {
			    (void) printf("%s", sharepath);
			}
			if (resource != NULL)
			    sa_free_attr_string(resource);
			if (properties)
			    show_properties(share, NULL, "\t");
			if (description != NULL) {
			    if (strlen(description) > 0) {
				(void) printf("\t\"%s\"", description);
			    }
			    sa_free_share_description(description);
			}
			if (type != NULL)
			    sa_free_attr_string(type);
		    } else {
			(void) printf("\t%s", sharepath);
			if (properties)
			    show_properties(share, NULL, "\t");
		    }
		    (void) printf("\n");
		    sa_free_attr_string(sharepath);
		}
	    }
	}
	if (groupname != NULL) {
		sa_free_attr_string(groupname);
	}
}

/*
 * show_group_xml_init()
 *
 * Create an XML document that will be used to display config info via
 * XML format.
 */

xmlDocPtr
show_group_xml_init()
{
	xmlDocPtr doc;
	xmlNodePtr root;

	doc = xmlNewDoc((xmlChar *)"1.0");
	if (doc != NULL) {
	    root = xmlNewNode(NULL, (xmlChar *)"sharecfg");
	    if (root != NULL)
		xmlDocSetRootElement(doc, root);
	}
	return (doc);
}

/*
 * show_group_xml(doc, group)
 *
 * Copy the group info into the XML doc.
 */

static void
show_group_xml(xmlDocPtr doc, sa_group_t group)
{
	xmlNodePtr node;
	xmlNodePtr root;

	root = xmlDocGetRootElement(doc);
	node = xmlCopyNode((xmlNodePtr)group, 1);
	if (node != NULL && root != NULL) {
	    xmlAddChild(root, node);
		/*
		 * In the future, we may have interally used tags that
		 * should not appear in the XML output. Remove
		 * anything we don't want to show here.
		 */
	}
}

/*
 * sa_show(flags, argc, argv)
 *
 * Implements the show subcommand.
 */

int
sa_show(int flags, int argc, char *argv[])
{
	sa_group_t group;
	int verbose = 0;
	int properties = 0;
	int c;
	int ret = SA_OK;
	char *protocol = NULL;
	int xml = 0;
	xmlDocPtr doc;
#ifdef lint
	flags = flags;
#endif

	while ((c = getopt(argc, argv, "?hvP:px")) !=	EOF) {
	    switch (c) {
	    case 'v':
		verbose++;
		break;
	    case 'p':
		properties++;
		break;
	    case 'P':
		protocol = optarg;
		if (!sa_valid_protocol(protocol)) {
		    (void) printf(gettext("Invalid protocol specified: %s\n"),
					protocol);
		    return (SA_INVALID_PROTOCOL);
		}
		break;
	    case 'x':
		xml++;
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"), sa_get_usage(USAGE_SHOW));
		return (0);
	    }
	}

	if (xml) {
	    doc = show_group_xml_init();
	    if (doc == NULL)
		ret = SA_NO_MEMORY;
	}

	if (optind == argc) {
	    /* no group specified so go through them all */
	    for (group = sa_get_group(NULL); group != NULL;
		group = sa_get_next_group(group)) {
		/*
		 * have a group so check if one we want and then list
		 * contents with appropriate options.
		 */
		if (xml)
		    show_group_xml(doc, group);
		else
		    show_group(group, verbose, properties, protocol, NULL);
	    }
	} else {
	    /* have a specified list of groups */
	    for (; optind < argc; optind++) {
		group = sa_get_group(argv[optind]);
		if (group != NULL) {
		    if (xml)
			show_group_xml(doc, group);
		    else
			show_group(group, verbose, properties, protocol, NULL);
		} else {
		    (void) printf(gettext("%s: not found\n"), argv[optind]);
		    ret = SA_NO_SUCH_GROUP;
		}
	    }
	}
	if (xml && ret == SA_OK) {
	    xmlDocFormatDump(stdout, doc, 1);
	    xmlFreeDoc(doc);
	}
	return (ret);

}

/*
 * enable_share(group, share, update_legacy)
 *
 * helper function to enable a share if the group is enabled.
 */

static int
enable_share(sa_group_t group, sa_share_t share, int update_legacy)
{
	char *value;
	int enabled;
	sa_optionset_t optionset;
	int ret = SA_OK;
	char *zfs = NULL;
	int iszfs = 0;

	/*
	 * need to enable this share if the group is enabled but not
	 * otherwise. The enable is also done on each protocol
	 * represented in the group.
	 */
	value = sa_get_group_attr(group, "state");
	enabled = value != NULL && strcmp(value, "enabled") == 0;
	if (value != NULL)
	    sa_free_attr_string(value);
	/* remove legacy config if necessary */
	if (update_legacy)
	    ret = sa_delete_legacy(share);
	zfs = sa_get_group_attr(group, "zfs");
	if (zfs != NULL) {
	    iszfs++;
	    sa_free_attr_string(zfs);
	}

	/*
	 * Step through each optionset at the group level and
	 * enable the share based on the protocol type. This
	 * works because protocols must be set on the group
	 * for the protocol to be enabled.
	 */
	for (optionset = sa_get_optionset(group, NULL);
	    optionset != NULL && ret == SA_OK;
	    optionset = sa_get_next_optionset(optionset)) {
	    value = sa_get_optionset_attr(optionset, "type");
	    if (value != NULL) {
		if (enabled)
		    ret = sa_enable_share(share, value);
		if (update_legacy && !iszfs)
		    (void) sa_update_legacy(share, value);
		sa_free_attr_string(value);
	    }
	}
	if (ret == SA_OK)
	    (void) sa_update_config();
	return (ret);
}

/*
 * sa_addshare(flags, argc, argv)
 *
 * implements add-share subcommand.
 */

int
sa_addshare(int flags, int argc, char *argv[])
{
	int verbose = 0;
	int dryrun = 0;
	int c;
	int ret = SA_OK;
	sa_group_t group;
	sa_share_t share;
	char *sharepath = NULL;
	char *description = NULL;
	char *resource = NULL;
	int persist = SA_SHARE_PERMANENT; /* default to persist */
	int auth;
	char dir[MAXPATHLEN];

	while ((c = getopt(argc, argv, "?hvns:d:r:t")) != EOF) {
	    switch (c) {
	    case 'n':
		dryrun++;
		break;
	    case 'v':
		verbose++;
		break;
	    case 'd':
		description = optarg;
		break;
	    case 'r':
		resource = optarg;
		break;
	    case 's':
		/*
		 * save share path into group. Currently limit
		 * to one share per command.
		 */
		if (sharepath != NULL) {
		    (void) printf(gettext("Adding multiple shares not"
				    "supported\n"));
		    return (1);
		}
		sharepath = optarg;
		break;
	    case 't':
		persist = SA_SHARE_TRANSIENT;
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_ADD_SHARE));
		return (0);
	    }
	}

	if (optind >= argc) {
	    (void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_ADD_SHARE));
	    if (dryrun || sharepath != NULL || description != NULL ||
		resource != NULL || verbose || persist) {
		(void) printf(gettext("\tgroup must be specified\n"));
		ret = SA_NO_SUCH_GROUP;
	    } else {
		ret = SA_OK;
	    }
	} else {
	    if (sharepath == NULL) {
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_ADD_SHARE));
		(void) printf(gettext("\t-s sharepath must be specified\n"));
		ret = SA_BAD_PATH;
	    }
	    if (ret == SA_OK) {
		if (realpath(sharepath, dir) == NULL) {
		    ret = SA_BAD_PATH;
		    (void) printf(gettext("Path is not valid: %s\n"),
					sharepath);
		} else {
		    sharepath = dir;
		}
	    }
	    if (ret == SA_OK && resource != NULL) {
		/* check for valid syntax */
		if (strpbrk(resource, " \t/") != NULL) {
		    (void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_ADD_SHARE));
		    (void) printf(gettext("\tresource must not contain white"
				    "space or '/' characters\n"));
		    ret = SA_BAD_PATH;
		}
	    }
	    if (ret == SA_OK) {
		group = sa_get_group(argv[optind]);
		if (group != NULL) {
		    auth = check_authorizations(argv[optind], flags);
		    share = sa_find_share(sharepath);
		    if (share != NULL) {
			group = sa_get_parent_group(share);
			if (group != NULL) {
			    char *groupname;
			    groupname = sa_get_group_attr(group, "name");
			    if (groupname != NULL) {
				(void) printf(gettext("Share path already "
							"shared in group "
							"\"%s\": %s\n"),
						groupname, sharepath);
				sa_free_attr_string(groupname);
			    } else {
				(void) printf(gettext("Share path already"
							"shared: %s\n"),
						groupname, sharepath);
			    }
			} else {
			    (void) printf(gettext("Share path %s already "
							"shared\n"),
				    sharepath);
			}
			ret = SA_DUPLICATE_NAME;
		    } else {
			/*
			 * need to check that resource name is unique
			 * at some point.
			 */
			if (dryrun)
			    ret = sa_check_path(group, sharepath);
			else
			    share = sa_add_share(group, sharepath,
							persist, &ret);
			if (!dryrun && share == NULL) {
				(void) printf(gettext("Could not add share: "
							"%s\n"),
					sa_errorstr(ret));
			} else {
			    if (!dryrun && ret == SA_OK) {
				if (resource != NULL) {
				    if (strpbrk(resource, " \t/") == NULL) {
					ret = sa_set_share_attr(share,
								"resource",
								resource);
				    }
				}
				if (ret == SA_OK && description != NULL) {
				    ret = sa_set_share_description(share,
							    description);
				}
				if (ret == SA_OK) {
				    /* now enable the share(s) */
				    ret = enable_share(group, share, 1);
				    ret = sa_update_config();
				}
				switch (ret) {
				case SA_DUPLICATE_NAME:
				    (void) printf(gettext("Resource name in"
						    "use: %s\n"),
					    resource);
				    break;
				default:
				    (void) printf(gettext("Could not set "
						    "attribute: %s\n"),
					    sa_errorstr(ret));
				    break;
				case SA_OK:
				    break;
				}
			    } else if (dryrun && ret == SA_OK &&
					!auth && verbose) {
				(void) printf(gettext("Command would fail: "
							"%s\n"),
					sa_errorstr(SA_NO_PERMISSION));
				ret = SA_NO_PERMISSION;
			    }
			}
		    }
		} else {
		    (void) printf(gettext("Group \"%s\" not found\n"),
					argv[optind]);
		    ret = SA_NO_SUCH_GROUP;
		}
	    }
	}
	return (ret);
}

/*
 * sa_moveshare(flags, argc, argv)
 *
 * implements move-share subcommand.
 */

int
sa_moveshare(int flags, int argc, char *argv[])
{
	int verbose = 0;
	int dryrun = 0;
	int c;
	int ret = SA_OK;
	sa_group_t group;
	sa_share_t share;
	char *sharepath = NULL;
	int authsrc = 0, authdst = 0;

	while ((c = getopt(argc, argv, "?hvns:")) != EOF) {
	    switch (c) {
	    case 'n':
		dryrun++;
		break;
	    case 'v':
		verbose++;
		break;
	    case 's':
		/*
		 * remove share path from group. Currently limit
		 * to one share per command.
		 */
		if (sharepath != NULL) {
		    (void) printf(gettext("Moving multiple shares not"
				    "supported\n"));
		    return (SA_BAD_PATH);
		}
		sharepath = optarg;
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_MOVE_SHARE));
		return (0);
	    }
	}

	if (optind >= argc || sharepath == NULL) {
			(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_MOVE_SHARE));
	    if (dryrun || verbose || sharepath != NULL) {
		(void) printf(gettext("\tgroup must be specified\n"));
		ret = SA_NO_SUCH_GROUP;
	    } else {
		if (sharepath == NULL) {
		    ret = SA_SYNTAX_ERR;
		    (void) printf(gettext("\tsharepath must be specified\n"));
		} else
		    ret = SA_OK;
	    }
	} else {
	    if (sharepath == NULL) {
		(void) printf(gettext("sharepath must be specified with "
				"the -s option\n"));
		ret = SA_BAD_PATH;
	    } else {
		group = sa_get_group(argv[optind]);
		if (group != NULL) {
		    share = sa_find_share(sharepath);
		    authdst = check_authorizations(argv[optind], flags);
		    if (share == NULL) {
			(void) printf(gettext("Share not found: %s\n"),
					sharepath);
			ret = SA_NO_SUCH_PATH;
		    } else {
			sa_group_t parent;
			char *zfsold;
			char *zfsnew;

			parent = sa_get_parent_group(share);
			if (parent != NULL) {
			    char *pname;
			    pname = sa_get_group_attr(parent, "name");
			    if (pname != NULL) {
				authsrc = check_authorizations(pname, flags);
				sa_free_attr_string(pname);
			    }
			    zfsold = sa_get_group_attr(parent, "zfs");
			    zfsnew = sa_get_group_attr(group, "zfs");
			    if ((zfsold != NULL && zfsnew == NULL) ||
				(zfsold == NULL && zfsnew != NULL)) {
				ret = SA_NOT_ALLOWED;
			    }
			    if (zfsold != NULL)
				sa_free_attr_string(zfsold);
			    if (zfsnew != NULL)
				sa_free_attr_string(zfsnew);
			}
			if (!dryrun && ret == SA_OK) {
			    ret = sa_move_share(group, share);
			}
			if (ret == SA_OK && parent != group && !dryrun) {
			    char *oldstate;
			    ret = sa_update_config();
				/*
				 * note that the share may need to be
				 * "unshared" if the new group is
				 * disabled and the old was enabled or
				 * it may need to be share to update
				 * if the new group is enabled.
				 */
			    oldstate = sa_get_group_attr(parent, "state");
			    /* enable_share determines what to do */
			    if (strcmp(oldstate, "enabled") == 0) {
				(void) sa_disable_share(share, NULL);
			    }
			    (void) enable_share(group, share, 1);
			    if (oldstate != NULL)
				sa_free_attr_string(oldstate);
			}
			if (ret != SA_OK) {
			    (void) printf(gettext("Could not move share: %s\n"),
				    sa_errorstr(ret));
			}
			if (dryrun && ret == SA_OK && !(authsrc & authdst) &&
			    verbose) {
			    (void) printf(gettext("Command would fail: %s\n"),
					sa_errorstr(SA_NO_PERMISSION));
			}
		    }
		} else {
		    (void) printf(gettext("Group \"%s\" not found\n"),
					argv[optind]);
		    ret = SA_NO_SUCH_GROUP;
		}
	    }
	}
	return (ret);
}

/*
 * sa_removeshare(flags, argc, argv)
 *
 * implements remove-share subcommand.
 */

int
sa_removeshare(int flags, int argc, char *argv[])
{
	int verbose = 0;
	int dryrun = 0;
	int force = 0;
	int c;
	int ret = SA_OK;
	sa_group_t group;
	sa_share_t share;
	char *sharepath = NULL;
	char dir[MAXPATHLEN];
	int auth;

	while ((c = getopt(argc, argv, "?hfns:v")) != EOF) {
	    switch (c) {
	    case 'n':
		dryrun++;
		break;
	    case 'v':
		verbose++;
		break;
	    case 'f':
		force++;
		break;
	    case 's':
		/*
		 * remove share path from group. Currently limit
		 * to one share per command.
		 */
		if (sharepath != NULL) {
		    (void) printf(gettext("Removing multiple shares not"
				    "supported\n"));
		    return (SA_SYNTAX_ERR);
		}
		sharepath = optarg;
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_REMOVE_SHARE));
		return (0);
	    }
	}

	if (optind >= argc || sharepath == NULL) {
	    if (sharepath == NULL) {
			(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_REMOVE_SHARE));
		(void) printf(gettext("\t-s sharepath must be specified\n"));
		ret = SA_BAD_PATH;
	    } else {
		ret = SA_OK;
	    }
	}
	if (ret == SA_OK) {
	    if (optind < argc) {
		if ((optind + 1) < argc) {
		    (void) printf(gettext("Extraneous group(s) at end of "
						"command\n"));
		    ret = SA_SYNTAX_ERR;
		} else {
		    group = sa_get_group(argv[optind]);
		    if (group == NULL) {
			(void) printf(gettext("Group \"%s\" not found\n"),
					argv[optind]);
			ret = SA_NO_SUCH_GROUP;
		    }
		}
	    } else {
		group = NULL;
	    }
	    if (ret == SA_OK) {
		if (realpath(sharepath, dir) == NULL) {
		    ret = SA_BAD_PATH;
		    (void) printf(gettext("Path is not valid: %s\n"),
					sharepath);
		} else {
		    sharepath = dir;
		}
	    }
	    if (ret == SA_OK) {
		if (group != NULL)
		    share = sa_get_share(group, sharepath);
		else
		    share = sa_find_share(sharepath);
		if (share == NULL) {
		    if (group != NULL)
			(void) printf(gettext("Share not found in group %s:"
						"%s\n"),
					argv[optind], sharepath);
		    else
			(void) printf(gettext("Share not found: %s\n"),
					sharepath);
		    ret = SA_NO_SUCH_PATH;
		} else {
		    if (group == NULL)
			group = sa_get_parent_group(share);
		    if (!dryrun) {
			if (ret == SA_OK) {
			    ret = sa_disable_share(share, NULL);
				/*
				 * we don't care if it fails since it
				 * could be disabled already.
				 */
			    if (ret == SA_OK || ret == SA_NO_SUCH_PATH ||
				ret == SA_NOT_SUPPORTED) {
				ret = sa_remove_share(share);
			    }
			    if (ret == SA_OK)
				ret = sa_update_config();
			}
			if (ret != SA_OK) {
			    (void) printf(gettext("Could not remove share:"
							" %s\n"),
					sa_errorstr(ret));
			}
		    } else if (ret == SA_OK) {
			char *pname;
			pname = sa_get_group_attr(group, "name");
			if (pname != NULL) {
			    auth = check_authorizations(pname, flags);
			    sa_free_attr_string(pname);
			}
			if (!auth && verbose) {
			    (void) printf(gettext("Command would fail: %s\n"),
					sa_errorstr(SA_NO_PERMISSION));
			}
		    }
		}
	    }
	}
	return (ret);
}

/*
 * sa_set_share(flags, argc, argv)
 *
 * implements set-share subcommand.
 */

int
sa_set_share(int flags, int argc, char *argv[])
{
	int dryrun = 0;
	int c;
	int ret = SA_OK;
	sa_group_t group, sharegroup;
	sa_share_t share;
	char *sharepath = NULL;
	char *description = NULL;
	char *resource = NULL;
	int auth;
	int verbose = 0;

	while ((c = getopt(argc, argv, "?hnd:r:s:")) != EOF) {
	    switch (c) {
	    case 'n':
		dryrun++;
		break;
	    case 'd':
		description = optarg;
		break;
	    case 'r':
		resource = optarg;
		break;
	    case 'v':
		verbose++;
		break;
	    case 's':
		/*
		 * save share path into group. Currently limit
		 * to one share per command.
		 */
		if (sharepath != NULL) {
		    (void) printf(gettext("Updating multiple shares not"
				    "supported\n"));
		    return (SA_BAD_PATH);
		}
		sharepath = optarg;
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_SET_SHARE));
		return (SA_OK);
	    }
	}
	if (optind >= argc || sharepath == NULL) {
	    if (sharepath == NULL) {
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_SET_SHARE));
		(void) printf(gettext("\tgroup must be specified\n"));
	    ret = SA_BAD_PATH;
	    } else {
		ret = SA_OK;
	    }
	}
	if ((optind + 1) < argc) {
	    (void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_SET_SHARE));
	    (void) printf(gettext("\tExtraneous group(s) at end\n"));
	    ret = SA_SYNTAX_ERR;
	}
	if (ret == SA_OK) {
	    char *groupname;
	    if (optind < argc) {
		groupname = argv[optind];
		group = sa_get_group(groupname);
	    } else {
		group = NULL;
		groupname = NULL;
	    }
	    share = sa_find_share(sharepath);
	    if (share != NULL) {
		sharegroup = sa_get_parent_group(share);
		if (group != NULL && group != sharegroup) {
		    (void) printf(gettext("Group \"%s\" does not contain "
						"share %s\n"),
			    argv[optind], sharepath);
		    ret = SA_BAD_PATH;
		} else {
		    int delgroupname = 0;
		    if (groupname == NULL) {
			groupname = sa_get_group_attr(sharegroup, "name");
			delgroupname = 1;
		    }
		    if (groupname != NULL) {
			auth = check_authorizations(groupname, flags);
			if (delgroupname) {
			    sa_free_attr_string(groupname);
			    groupname = NULL;
			}
		    } else {
			ret = SA_NO_MEMORY;
		    }
		    if (resource != NULL) {
			if (strpbrk(resource, " \t/") == NULL) {
			    if (!dryrun) {
				ret = sa_set_share_attr(share, "resource",
						    resource);
			    } else {
				sa_share_t resshare;
				resshare = sa_get_resource(sharegroup,
							    resource);
				if (resshare != NULL && resshare != share)
				    ret = SA_DUPLICATE_NAME;
			    }
			} else {
			    ret = SA_BAD_PATH;
			    (void) printf(gettext("Resource must not contain "
						"white space or '/'\n"));
			}
		    }
		    if (ret == SA_OK && description != NULL) {
			ret = sa_set_share_description(share, description);
		    }
		}
		if (!dryrun && ret == SA_OK) {
		    ret = sa_update_config();
		}
		switch (ret) {
		case SA_DUPLICATE_NAME:
		    (void) printf(gettext("Resource name in use: %s\n"),
					resource);
		    break;
		default:
		    (void) printf(gettext("Could not set attribute: %s\n"),
			    sa_errorstr(ret));
		    break;
		case SA_OK:
		    if (dryrun && !auth && verbose) {
			(void) printf(gettext("Command would fail: %s\n"),
				sa_errorstr(SA_NO_PERMISSION));
		    }
		    break;
		}
	    } else {
		(void) printf(gettext("Share path \"%s\" not found\n"),
				sharepath);
		ret = SA_NO_SUCH_PATH;
	    }
	}
	return (ret);
}

/*
 * add_security(group, sectype, optlist, proto, *err)
 *
 * Helper function to add a security option (named optionset) to the
 * group.
 */

static int
add_security(sa_group_t group, char *sectype,
		struct options *optlist, char *proto, int *err)
{
	sa_security_t security;
	int ret = SA_OK;
	int result = 0;

	sectype = sa_proto_space_alias(proto, sectype);
	security = sa_get_security(group, sectype, proto);
	if (security == NULL) {
	    security = sa_create_security(group, sectype, proto);
	}
	if (sectype != NULL)
	    sa_free_attr_string(sectype);
	if (security != NULL) {
	    while (optlist != NULL) {
		sa_property_t prop;
		prop = sa_get_property(security, optlist->optname);
		if (prop == NULL) {
			/*
			 * add the property, but only if it is
			 * a non-NULL or non-zero length value
			 */
		    if (optlist->optvalue != NULL) {
			prop = sa_create_property(optlist->optname,
							optlist->optvalue);
			if (prop != NULL) {
			    ret = sa_valid_property(security, proto, prop);
			    if (ret != SA_OK) {
				(void) sa_remove_property(prop);
				(void) printf(gettext("Could not add "
							"property %s: %s\n"),
							optlist->optname,
						sa_errorstr(ret));
			    }
			    if (ret == SA_OK) {
				ret = sa_add_property(security, prop);
				if (ret != SA_OK) {
				    (void) printf(gettext("Could not add "
						    "property (%s=%s): %s\n"),
						optlist->optname,
						optlist->optvalue,
						sa_errorstr(ret));
				} else {
				    result = 1;
				}
			    }
			}
		    }
		} else {
		    ret = sa_update_property(prop, optlist->optvalue);
		    result = 1; /* should check if really changed */
		}
		optlist = optlist->next;
	    }
		/*
		 * when done, properties may have all been removed but
		 * we need to keep the security type itself until
		 * explicitly removed.
		 */
	    if (result)
		ret = sa_commit_properties(security, 0);
	}
	*err = ret;
	return (result);
}

/*
 * basic_set(groupname, optlist, protocol, sharepath, dryrun)
 *
 * This function implements "set" when a name space (-S) is not
 * specified. It is a basic set. Options and other CLI parsing has
 * already been done.
 */

static int
basic_set(char *groupname, struct options *optlist, char *protocol,
		char *sharepath, int dryrun)
{
	sa_group_t group;
	int ret = SA_OK;
	int change = 0;
	struct list *worklist = NULL;

	group = sa_get_group(groupname);
	if (group != NULL) {
	    sa_share_t share = NULL;
	    if (sharepath != NULL) {
		share = sa_get_share(group, sharepath);
		if (share == NULL) {
		    (void) printf(gettext("Share does not exist in group %s\n"),
				groupname, sharepath);
		    ret = SA_NO_SUCH_PATH;
		}
	    }
	    if (ret == SA_OK) {
		/* group must exist */
		ret = valid_options(optlist, protocol,
				    share == NULL ? group : share, NULL);
		if (ret == SA_OK && !dryrun) {
		    if (share != NULL)
			change |= add_optionset(share, optlist, protocol,
						&ret);
		    else
			change |= add_optionset(group, optlist, protocol,
						&ret);
		    if (ret == SA_OK && change) {
			worklist = add_list(worklist, group, share);
		    }
		}
	    }
	    free_opt(optlist);
	} else {
		(void) printf(gettext("Group \"%s\" not found\n"), groupname);
		ret = SA_NO_SUCH_GROUP;
	}
	/*
	 * we have a group and potentially legal additions
	 */

	/* commit to configuration if not a dryrun */
	if (!dryrun && ret == SA_OK) {
	    if (change && worklist != NULL) {
		/* properties changed, so update all shares */
		(void) enable_all_groups(worklist, 0, 0, protocol);
	    }
	}
	if (worklist != NULL)
	    free_list(worklist);
	return (ret);
}

/*
 * space_set(groupname, optlist, protocol, sharepath, dryrun)
 *
 * This function implements "set" when a name space (-S) is
 * specified. It is a namespace set. Options and other CLI parsing has
 * already been done.
 */

static int
space_set(char *groupname, struct options *optlist, char *protocol,
		char *sharepath, int dryrun, char *sectype)
{
	sa_group_t group;
	int ret = SA_OK;
	int change = 0;
	struct list *worklist = NULL;

	/*
	 * make sure protcol and sectype are valid
	 */

	if (sa_proto_valid_space(protocol, sectype) == 0) {
	    (void) printf(gettext("Option space \"%s\" not valid "
					"for protocol.\n"),
				sectype);
	    return (SA_INVALID_SECURITY);
	}

	group = sa_get_group(groupname);
	if (group != NULL) {
	    sa_share_t share = NULL;
	    if (sharepath != NULL) {
		share = sa_get_share(group, sharepath);
		if (share == NULL) {
		    (void) printf(gettext("Share does not exist in group %s\n"),
				groupname, sharepath);
		    ret = SA_NO_SUCH_PATH;
		}
	    }
	    if (ret == SA_OK) {
		/* group must exist */
		ret = valid_options(optlist, protocol,
				    share == NULL ? group : share, sectype);
		if (ret == SA_OK && !dryrun) {
		    if (share != NULL)
			change = add_security(share, sectype, optlist,
						protocol,
						&ret);
		    else
			change = add_security(group, sectype, optlist,
						protocol,
						&ret);
		    if (ret != SA_OK)
			(void) printf(gettext("Could not set property: %s\n"),
				sa_errorstr(ret));
		}
		if (ret == SA_OK && change)
		    worklist = add_list(worklist, group, share);
	    }
	    free_opt(optlist);
	} else {
		(void) printf(gettext("Group \"%s\" not found\n"), groupname);
		ret = SA_NO_SUCH_GROUP;
	}
	/*
	 * we have a group and potentially legal additions
	 */

	/* commit to configuration if not a dryrun */
	if (!dryrun && ret == 0) {
	    if (change && worklist != NULL) {
		/* properties changed, so update all shares */
		(void) enable_all_groups(worklist, 0, 0, protocol);
	    }
	    ret = sa_update_config();
	}
	if (worklist != NULL)
	    free_list(worklist);
	return (ret);
}

/*
 * sa_set(flags, argc, argv)
 *
 * Implements the set subcommand. It keys off of -S to determine which
 * set of operations to actually do.
 */

int
sa_set(int flags, int argc, char *argv[])
{
	char *groupname;
	int verbose = 0;
	int dryrun = 0;
	int c;
	char *protocol = NULL;
	int ret = SA_OK;
	struct options *optlist = NULL;
	char *sharepath = NULL;
	char *optset = NULL;
	int auth;

	while ((c = getopt(argc, argv, "?hvnP:p:s:S:")) != EOF) {
	    switch (c) {
	    case 'v':
		verbose++;
		break;
	    case 'n':
		dryrun++;
		break;
	    case 'P':
		protocol = optarg;
		if (!sa_valid_protocol(protocol)) {
		    (void) printf(gettext("Invalid protocol specified:"
				    "%s\n"),
					protocol);
		    return (SA_INVALID_PROTOCOL);
		}
		break;
	    case 'p':
		ret = add_opt(&optlist, optarg, 0);
		switch (ret) {
		case OPT_ADD_SYNTAX:
		    (void) printf(gettext("Property syntax error: %s\n"),
					optarg);
		    return (SA_SYNTAX_ERR);
		case OPT_ADD_MEMORY:
		    (void) printf(gettext("No memory to set property: %s\n"),
					optarg);
		    return (SA_NO_MEMORY);
		default:
		    break;
		}
		break;
	    case 's':
		sharepath = optarg;
		break;
	    case 'S':
		optset = optarg;
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_SET));
		return (SA_OK);
	    }
	}

	if (optlist != NULL)
	    ret = chk_opt(optlist, optset != NULL, protocol);

	if (optind >= argc || (optlist == NULL && optset == NULL) ||
	    protocol == NULL ||
	    ret != OPT_ADD_OK) {
	    char *sep = "\t";
	    (void) printf(gettext("usage: %s\n"), sa_get_usage(USAGE_SET));
	    if (optind >= argc) {
		(void) printf(gettext("%sgroup must be specified"), sep);
		sep = ", ";
	    }
	    if (optlist == NULL) {
		(void) printf(gettext("%sat least one property must be"
				" specified"), sep);
		sep = ", ";
	    }
	    if (protocol == NULL) {
		(void) printf(gettext("%sprotocol must be specified"), sep);
		sep = ", ";
	    }
	    (void) printf("\n");
	    ret = SA_SYNTAX_ERR;
	} else {
		/*
		 * if a group already exists, we can only add a new
		 * protocol to it and not create a new one or add the
		 * same protocol again.
		 */

	    groupname = argv[optind];
	    auth = check_authorizations(groupname, flags);
	    if (optset == NULL)
		ret = basic_set(groupname, optlist, protocol,
				sharepath, dryrun);
	    else
		ret = space_set(groupname, optlist, protocol,
				sharepath, dryrun, optset);
	    if (dryrun && ret == SA_OK && !auth && verbose) {
		(void) printf(gettext("Command would fail: %s\n"),
			sa_errorstr(SA_NO_PERMISSION));
	    }
	}
	return (ret);
}

/*
 * remove_options(group, optlist, proto, *err)
 *
 * helper function to actually remove options from a group after all
 * preprocessing is done.
 */

static int
remove_options(sa_group_t group, struct options *optlist,
		char *proto, int *err)
{
	struct options *cur;
	sa_optionset_t optionset;
	sa_property_t prop;
	int change = 0;
	int ret = SA_OK;

	optionset = sa_get_optionset(group, proto);
	if (optionset != NULL) {
	    for (cur = optlist; cur != NULL; cur = cur->next) {
		prop = sa_get_property(optionset, cur->optname);
		if (prop != NULL) {
		    ret = sa_remove_property(prop);
		    if (ret != SA_OK)
			break;
		    change = 1;
		}
	    }
	}
	if (ret == SA_OK && change)
	    ret = sa_commit_properties(optionset, 0);

	if (err != NULL)
	    *err = ret;
	return (change);
}

/*
 * valid_unset(group, optlist, proto)
 *
 * Sanity check the optlist to make sure they can be removed. Issue an
 * error if a property doesn't exist.
 */

static int
valid_unset(sa_group_t group, struct options *optlist, char *proto)
{
	struct options *cur;
	sa_optionset_t optionset;
	sa_property_t prop;
	int ret = SA_OK;

	optionset = sa_get_optionset(group, proto);
	if (optionset != NULL) {
	    for (cur = optlist; cur != NULL; cur = cur->next) {
		prop = sa_get_property(optionset, cur->optname);
		if (prop == NULL) {
		    (void) printf(gettext("Could not unset property %s:"
						" not set\n"),
			    cur->optname);
		    ret = SA_NO_SUCH_PROP;
		}
	    }
	}
	return (ret);
}

/*
 * valid_unset_security(group, optlist, proto)
 *
 * Sanity check the optlist to make sure they can be removed. Issue an
 * error if a property doesn't exist.
 */

static int
valid_unset_security(sa_group_t group, struct options *optlist, char *proto,
	    char *sectype)
{
	struct options *cur;
	sa_security_t security;
	sa_property_t prop;
	int ret = SA_OK;
	char *sec;

	sec = sa_proto_space_alias(proto, sectype);
	security = sa_get_security(group, sec, proto);
	if (security != NULL) {
	    for (cur = optlist; cur != NULL; cur = cur->next) {
		prop = sa_get_property(security, cur->optname);
		if (prop == NULL) {
		    (void) printf(gettext("Could not unset property %s:"
						" not set\n"),
					cur->optname);
		    ret = SA_NO_SUCH_PROP;
		}
	    }
	} else {
	    (void) printf(gettext("Could not unset %s: space not defined\n"),
			    sectype);
	    ret = SA_NO_SUCH_SECURITY;
	}
	if (sec != NULL)
	    sa_free_attr_string(sec);
	return (ret);
}

/*
 * remove_security(group, optlist, proto)
 *
 * Remove the properties since they were checked as valid.
 */

static int
remove_security(sa_group_t group, char *sectype,
		struct options *optlist, char *proto, int *err)
{
	sa_security_t security;
	int ret = SA_OK;
	int change = 0;

	sectype = sa_proto_space_alias(proto, sectype);
	security = sa_get_security(group, sectype, proto);
	if (sectype != NULL)
	    sa_free_attr_string(sectype);

	if (security != NULL) {
	    while (optlist != NULL) {
		sa_property_t prop;
		prop = sa_get_property(security, optlist->optname);
		if (prop != NULL) {
		    ret = sa_remove_property(prop);
		    if (ret != SA_OK)
			break;
		    change = 1;
		}
		optlist = optlist->next;
	    }
		/*
		 * when done, properties may have all been removed but
		 * we need to keep the security type itself until
		 * explicitly removed.
		 */
	    if (ret == SA_OK && change)
		ret = sa_commit_properties(security, 0);
	} else {
	    ret = SA_NO_SUCH_PROP;
	}
	if (err != NULL)
	    *err = ret;
	return (change);
}

/*
 * basic_unset(groupname, optlist, protocol, sharepath, dryrun)
 *
 * unset non-named optionset properties.
 */

static int
basic_unset(char *groupname, struct options *optlist, char *protocol,
		char *sharepath, int dryrun)
{
	sa_group_t group;
	int ret = SA_OK;
	int change = 0;
	struct list *worklist = NULL;

	group = sa_get_group(groupname);
	if (group != NULL) {
	    sa_share_t share = NULL;
	    if (sharepath != NULL) {
		share = sa_get_share(group, sharepath);
		if (share == NULL) {
		    (void) printf(gettext("Share does not exist in group %s\n"),
				groupname, sharepath);
		    ret = SA_NO_SUCH_PATH;
		}
	    }
	    if (ret == SA_OK) {
		/* group must exist */
		ret = valid_unset(share != NULL ? share : group,
					optlist, protocol);
		if (ret == SA_OK && !dryrun) {
		    if (share != NULL) {
			sa_optionset_t optionset;
			sa_property_t prop;
			change |= remove_options(share, optlist, protocol,
							&ret);
			/* if a share optionset is empty, remove it */
			optionset = sa_get_optionset((sa_share_t)share,
							protocol);
			if (optionset != NULL) {
			    prop = sa_get_property(optionset, NULL);
			    if (prop == NULL)
				(void) sa_destroy_optionset(optionset);
			}
		    } else {
			change |= remove_options(group, optlist, protocol,
							&ret);
		    }
		    if (ret == SA_OK && change)
			worklist = add_list(worklist, group, share);
		    if (ret != SA_OK)
			(void) printf(gettext("Could not remove properties:"
						"%s\n"),
				sa_errorstr(ret));
		}
	    } else {
		(void) printf(gettext("Group \"%s\" not found\n"), groupname);
		ret = SA_NO_SUCH_GROUP;
	    }
	    free_opt(optlist);
	}

	/*
	 * we have a group and potentially legal additions
	 */
	/* commit to configuration if not a dryrun */
	if (!dryrun && ret == SA_OK) {
	    if (change && worklist != NULL) {
		/* properties changed, so update all shares */
		(void) enable_all_groups(worklist, 0, 0, protocol);
	    }
	}
	if (worklist != NULL)
	    free_list(worklist);
	return (ret);
}

/*
 * space_unset(groupname, optlist, protocol, sharepath, dryrun)
 *
 * unset named optionset properties.
 */
static int
space_unset(char *groupname, struct options *optlist, char *protocol,
		char *sharepath, int dryrun, char *sectype)
{
	sa_group_t group;
	int ret = SA_OK;
	int change = 0;
	struct list *worklist = NULL;

	group = sa_get_group(groupname);
	if (group != NULL) {
	    sa_share_t share = NULL;
	    if (sharepath != NULL) {
		share = sa_get_share(group, sharepath);
		if (share == NULL) {
		    (void) printf(gettext("Share does not exist in group %s\n"),
				groupname, sharepath);
		    ret = SA_NO_SUCH_PATH;
		}
	    }
	    if (ret == SA_OK) {
		ret = valid_unset_security(share != NULL ? share : group,
						optlist, protocol, sectype);
		if (ret == SA_OK && !dryrun) {
		    if (optlist != NULL) {
			if (share != NULL) {
			    sa_security_t optionset;
			    sa_property_t prop;
			    change = remove_security(share, sectype,
							optlist, protocol,
							&ret);
			    /* if a share security is empty, remove it */
			    optionset = sa_get_security((sa_group_t)share,
							sectype,
							protocol);
			    if (optionset != NULL) {
				prop = sa_get_property(optionset, NULL);
				if (prop == NULL)
				    ret = sa_destroy_security(optionset);
			    }
			} else {
			    change = remove_security(group, sectype,
							optlist, protocol,
							&ret);
			}
		    } else {
			sa_security_t security;
			char *sec;
			sec = sa_proto_space_alias(protocol, sectype);
			security = sa_get_security(group, sec, protocol);
			if (sec != NULL)
			    sa_free_attr_string(sec);
			if (security != NULL) {
			    ret = sa_destroy_security(security);
			    if (ret == SA_OK)
				change = 1;
			} else {
			    ret = SA_NO_SUCH_PROP;
			}
		    }
		    if (ret != SA_OK)
			(void) printf(gettext("Could not unset property: %s\n"),
				sa_errorstr(ret));
		}

		if (ret == SA_OK && change)
		    worklist = add_list(worklist, group, 0);
	    }
	} else {
	    (void) printf(gettext("Group \"%s\" not found\n"), groupname);
	    ret = SA_NO_SUCH_GROUP;
	}
	free_opt(optlist);
	/*
	 * we have a group and potentially legal additions
	 */

	/* commit to configuration if not a dryrun */
	if (!dryrun && ret == 0) {
	    if (change && worklist != NULL) {
		/* properties changed, so update all shares */
		(void) enable_all_groups(worklist, 0, 0, protocol);
	    }
	    ret = sa_update_config();
	}
	if (worklist != NULL)
	    free_list(worklist);
	return (ret);
}

/*
 * sa_unset(flags, argc, argv)
 *
 * implements the unset subcommand. Parsing done here and then basic
 * or space versions of the real code are called.
 */

int
sa_unset(int flags, int argc, char *argv[])
{
	char *groupname;
	int verbose = 0;
	int dryrun = 0;
	int c;
	char *protocol = NULL;
	int ret = SA_OK;
	struct options *optlist = NULL;
	char *sharepath = NULL;
	char *optset = NULL;
	int auth;

	while ((c = getopt(argc, argv, "?hvnP:p:s:S:")) != EOF) {
	    switch (c) {
	    case 'v':
		verbose++;
		break;
	    case 'n':
		dryrun++;
		break;
	    case 'P':
		protocol = optarg;
		if (!sa_valid_protocol(protocol)) {
		    (void) printf(gettext("Invalid protocol specified: %s\n"),
					protocol);
		    return (SA_INVALID_PROTOCOL);
		}
		break;
	    case 'p':
		ret = add_opt(&optlist, optarg, 1);
		switch (ret) {
		case OPT_ADD_SYNTAX:
		    (void) printf(gettext("Property syntax error for "
						"property %s\n"),
					optarg);
		    return (SA_SYNTAX_ERR);
		case OPT_ADD_PROPERTY:
		    (void) printf(gettext("Properties need to be set"
						" with set command: %s\n"),
					optarg);
		    return (SA_SYNTAX_ERR);
		default:
		    break;
		}
		break;
	    case 's':
		sharepath = optarg;
		break;
	    case 'S':
		optset = optarg;
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_UNSET));
		return (SA_OK);
	    }
	}

	if (optlist != NULL)
	    ret = chk_opt(optlist, optset != NULL, protocol);

	if (optind >= argc || (optlist == NULL && optset == NULL) ||
	    protocol == NULL) {
	    char *sep = "\t";
	    (void) printf(gettext("usage: %s\n"), sa_get_usage(USAGE_UNSET));
	    if (optind >= argc) {
		(void) printf(gettext("%sgroup must be specified"), sep);
		sep = ", ";
	    }
	    if (optlist == NULL) {
		(void) printf(gettext("%sat least one property must be "
					"specified"),
			sep);
		sep = ", ";
	    }
	    if (protocol == NULL) {
		(void) printf(gettext("%sprotocol must be specified"), sep);
		sep = ", ";
	    }
	    (void) printf("\n");
	    ret = SA_SYNTAX_ERR;
	} else {

		/*
		 * if a group already exists, we can only add a new
		 * protocol to it and not create a new one or add the
		 * same protocol again.
		 */

	    groupname = argv[optind];
	    auth = check_authorizations(groupname, flags);
	    if (optset == NULL)
		ret = basic_unset(groupname, optlist, protocol,
					sharepath, dryrun);
	    else
		ret = space_unset(groupname, optlist, protocol,
					sharepath, dryrun, optset);

	    if (dryrun && ret == SA_OK && !auth && verbose) {
		(void) printf(gettext("Command would fail: %s\n"),
			sa_errorstr(SA_NO_PERMISSION));
	    }
	}
	return (ret);
}

/*
 * sa_enable_group(flags, argc, argv)
 *
 * Implements the enable subcommand
 */

int
sa_enable_group(int flags, int argc, char *argv[])
{
	int verbose = 0;
	int dryrun = 0;
	int all = 0;
	int c;
	int ret = SA_OK;
	char *protocol = NULL;
	char *state;
	struct list *worklist = NULL;
	int auth = 1;

	while ((c = getopt(argc, argv, "?havnP:")) != EOF) {
	    switch (c) {
	    case 'a':
		all = 1;
		break;
	    case 'n':
		dryrun++;
		break;
	    case 'P':
		protocol = optarg;
		if (!sa_valid_protocol(protocol)) {
		    (void) printf(gettext("Invalid protocol specified: %s\n"),
				    protocol);
		    return (SA_INVALID_PROTOCOL);
		}
		break;
	    case 'v':
		verbose++;
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_ENABLE));
		return (0);
	    }
	}

	if (optind == argc && !all) {
	    (void) printf(gettext("usage: %s\n"), sa_get_usage(USAGE_ENABLE));
	    (void) printf(gettext("\tmust specify group\n"));
	    ret = SA_NO_SUCH_PATH;
	} else {
	    sa_group_t group;
	    if (!all) {
		while (optind < argc) {
		    group = sa_get_group(argv[optind]);
		    if (group != NULL) {
			auth &= check_authorizations(argv[optind], flags);
			state = sa_get_group_attr(group, "state");
			if (state != NULL &&
			    strcmp(state, "enabled") == 0) {
			    /* already enabled */
			    if (verbose)
				(void) printf(gettext("Group \"%s\" is already "
						"enabled\n"),
					argv[optind]);
			    ret = SA_BUSY; /* already enabled */
			} else {
			    worklist = add_list(worklist, group, 0);
			    if (verbose)
				(void) printf(gettext("Enabling group "
							"\"%s\"\n"),
					argv[optind]);
			}
			if (state != NULL)
			    sa_free_attr_string(state);
		    } else {
			ret = SA_NO_SUCH_GROUP;
		    }
		    optind++;
		}
	    } else {
		for (group = sa_get_group(NULL); group != NULL;
		    group = sa_get_next_group(group)) {
		    worklist = add_list(worklist, group, 0);
		}
	    }
	    if (!dryrun && ret == SA_OK) {
		ret = enable_all_groups(worklist, 1, 0, NULL);
	    }
	    if (ret != SA_OK && ret != SA_BUSY)
		(void) printf(gettext("Could not enable group: %s\n"),
			sa_errorstr(ret));
	    if (ret == SA_BUSY)
		ret = SA_OK;
	}
	if (worklist != NULL)
	    free_list(worklist);
	if (dryrun && ret == SA_OK && !auth && verbose) {
	    (void) printf(gettext("Command would fail: %s\n"),
			sa_errorstr(SA_NO_PERMISSION));
	}
	return (ret);
}

/*
 * disable_group(group, setstate)
 *
 * disable all the shares in the specified group honoring the setstate
 * argument. This is a helper for disable_all_groups in order to
 * simplify regular and subgroup (zfs) disabling. Group has already
 * been checked for non-NULL.
 */

static int
disable_group(sa_group_t group)
{
	sa_share_t share;
	int ret = SA_OK;

	for (share = sa_get_share(group, NULL);
	    share != NULL && ret == SA_OK;
	    share = sa_get_next_share(share)) {
	    ret = sa_disable_share(share, NULL);
	    if (ret == SA_NO_SUCH_PATH) {
		/*
		 * this is OK since the path is gone. we can't
		 * re-share it anyway so no error.
		 */
		ret = SA_OK;
	    }
	}
	return (ret);
}


/*
 * disable_all_groups(work, setstate)
 *
 * helper function that disables the shares in the list of groups
 * provided. It optionally marks the group as disabled. Used by both
 * enable and start subcommands.
 */

static int
disable_all_groups(struct list *work, int setstate)
{
	int ret = SA_OK;
	sa_group_t subgroup, group;

	while (work != NULL && ret == SA_OK) {
	    group = (sa_group_t)work->item;
	    if (setstate)
		ret = sa_set_group_attr(group, "state", "disabled");
	    if (ret == SA_OK) {
		char *name;
		name = sa_get_group_attr(group, "name");
		if (name != NULL && strcmp(name, "zfs") == 0) {
		    /* need to get the sub-groups for stopping */
		    for (subgroup = sa_get_sub_group(group); subgroup != NULL;
			subgroup = sa_get_next_group(subgroup)) {
			ret = disable_group(subgroup);
		    }
		} else {
		    ret = disable_group(group);
		}
		/*
		 * we don't want to "disable" since it won't come
		 * up after a reboot.  The SMF framework should do
		 * the right thing. On enable we do want to do
		 * something.
		 */
	    }
	    work = work->next;
	}
	if (ret == SA_OK)
	    ret = sa_update_config();
	return (ret);
}

/*
 * sa_disable_group(flags, argc, argv)
 *
 * Implements the disable subcommand
 */

int
sa_disable_group(int flags, int argc, char *argv[])
{
	int verbose = 0;
	int dryrun = 0;
	int all = 0;
	int c;
	int ret = SA_OK;
	char *protocol;
	char *state;
	struct list *worklist = NULL;
	int auth = 1;

	while ((c = getopt(argc, argv, "?havn")) != EOF) {
	    switch (c) {
	    case 'a':
		all = 1;
		break;
	    case 'n':
		dryrun++;
		break;
	    case 'P':
		protocol = optarg;
		if (!sa_valid_protocol(protocol)) {
		    (void) printf(gettext("Invalid protocol specified: %s\n"),
					protocol);
		    return (SA_INVALID_PROTOCOL);
		}
		break;
	    case 'v':
		verbose++;
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_DISABLE));
		return (0);
	    }
	}

	if (optind == argc && !all) {
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_DISABLE));
		(void) printf(gettext("\tmust specify group\n"));
		ret = SA_NO_SUCH_PATH;
	} else {
		sa_group_t group;
		if (!all) {
		    while (optind < argc) {
			group = sa_get_group(argv[optind]);
			if (group != NULL) {
			    auth &= check_authorizations(argv[optind], flags);
			    state = sa_get_group_attr(group, "state");
			    if (state == NULL ||
				strcmp(state, "disabled") == 0) {
				/* already disabled */
				if (verbose)
				    (void) printf(gettext("Group \"%s\" is "
							"already disabled\n"),
					    argv[optind]);
				ret = SA_BUSY; /* already disable */
			    } else {
				worklist = add_list(worklist, group, 0);
				if (verbose)
				    (void) printf(gettext("Disabling group "
							    "\"%s\"\n"),
					    argv[optind]);
			    }
			    if (state != NULL)
				sa_free_attr_string(state);
			} else {
			    ret = SA_NO_SUCH_GROUP;
			}
			optind++;
		    }
		} else {
		    for (group = sa_get_group(NULL); group != NULL;
			    group = sa_get_next_group(group)) {
			worklist = add_list(worklist, group, 0);
		    }
		}
		if (ret == SA_OK && !dryrun) {
			ret = disable_all_groups(worklist, 1);
		}
		if (ret != SA_OK && ret != SA_BUSY)
		    (void) printf(gettext("Could not disable group: %s\n"),
				sa_errorstr(ret));
		if (ret == SA_BUSY)
		    ret = SA_OK;
	}
	if (worklist != NULL)
	    free_list(worklist);
	if (dryrun && ret == SA_OK && !auth && verbose) {
	    (void) printf(gettext("Command would fail: %s\n"),
			sa_errorstr(SA_NO_PERMISSION));
	}
	return (ret);
}

/*
 * check_sharetab()
 *
 * Checks to see if the /etc/dfs/sharetab file is stale (exists from
 * before the current boot). If it is, truncate it since nothing is
 * really shared.
 */

static void
check_sharetab()
{
	int fd;
	struct utmpx *utmpxp;
	struct stat st;

	fd = open(SA_LEGACY_SHARETAB, O_RDWR);
	if (fd >= 0) {
		/*
		 * Attempt to get a lock on the file. Whgen we get
		 * one, then check to see if it is older than the boot
		 * time. Truncate if older than boot.
		 */
	    (void) lockf(fd, F_LOCK, 0);
	    if ((fstat(fd, &st) == 0) && /* does sharetab exist? */
		(utmpxp = getutxent()) != NULL && /* does utmpx exist? */
			(utmpxp->ut_xtime > st.st_mtime)) /* sharetab older? */
		(void) ftruncate(fd, 0);

	    (void) lockf(fd, F_ULOCK, 0);
	    (void) close(fd);
	    endutxent();
	}
}

/*
 * sa_start_group(flags, argc, argv)
 *
 * Implements the start command.
 * This is similar to enable except it doesn't change the state
 * of the group(s) and only enables shares if the group is already
 * enabled.
 */

int
sa_start_group(int flags, int argc, char *argv[])
{
	int verbose = 0;
	int all = 0;
	int c;
	int ret = SMF_EXIT_OK;
	char *protocol = NULL;
	char *state;
	struct list *worklist = NULL;
#ifdef lint
	flags = flags;
#endif

	while ((c = getopt(argc, argv, "?havP:")) != EOF) {
	    switch (c) {
	    case 'a':
		all = 1;
		break;
	    case 'P':
		protocol = optarg;
		if (!sa_valid_protocol(protocol)) {
		    (void) printf(gettext("Invalid protocol specified: %s\n"),
				    protocol);
		    return (SA_INVALID_PROTOCOL);
		}
		break;
	    case 'v':
		verbose++;
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_START));
		return (SA_OK);
	    }
	}

	if (optind == argc && !all) {
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_START));
		ret = SMF_EXIT_ERR_FATAL;
	} else {
		sa_group_t group;

		check_sharetab();

		if (!all) {
		    while (optind < argc) {
			group = sa_get_group(argv[optind]);
			if (group != NULL) {
			    state = sa_get_group_attr(group, "state");
			    if (state == NULL ||
				strcmp(state, "enabled") == 0) {
				worklist = add_list(worklist, group, 0);
				if (verbose)
				    (void) printf(gettext("Starting group "
								"\"%s\"\n"),
					    argv[optind]);
			    } else {
				/*
				 * determine if there are any
				 * protocols.  if there aren't any,
				 * then there isn't anything to do in
				 * any case so no error.
				 */
				if (sa_get_optionset(group, protocol) != NULL) {
				    ret = SMF_EXIT_OK;
				}
			    }
			    if (state != NULL)
				sa_free_attr_string(state);
			}
			optind++;
		    }
		} else {
		    for (group = sa_get_group(NULL); group != NULL;
			    group = sa_get_next_group(group)) {
			state = sa_get_group_attr(group, "state");
			if (state == NULL || strcmp(state, "enabled") == 0)
			    worklist = add_list(worklist, group, 0);
			if (state != NULL)
			    sa_free_attr_string(state);
		    }
		}
		(void) enable_all_groups(worklist, 0, 1, NULL);
	}
	if (worklist != NULL)
	    free_list(worklist);
	return (ret);
}

/*
 * sa_stop_group(flags, argc, argv)
 *
 * Implements the stop command.
 * This is similar to disable except it doesn't change the state
 * of the group(s) and only disables shares if the group is already
 * enabled.
 */

int
sa_stop_group(int flags, int argc, char *argv[])
{
	int verbose = 0;
	int all = 0;
	int c;
	int ret = SMF_EXIT_OK;
	char *protocol = NULL;
	char *state;
	struct list *worklist = NULL;
#ifdef lint
	flags = flags;
#endif

	while ((c = getopt(argc, argv, "?havP:")) != EOF) {
	    switch (c) {
	    case 'a':
		all = 1;
		break;
	    case 'P':
		protocol = optarg;
		if (!sa_valid_protocol(protocol)) {
		    (void) printf(gettext("Invalid protocol specified: %s\n"),
					protocol);
		    return (SA_INVALID_PROTOCOL);
		}
		break;
	    case 'v':
		verbose++;
		break;
	    default:
	    case 'h':
	    case '?':
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_STOP));
		return (0);
	    }
	}

	if (optind == argc && !all) {
		(void) printf(gettext("usage: %s\n"), sa_get_usage(USAGE_STOP));
		ret = SMF_EXIT_ERR_FATAL;
	} else {
		sa_group_t group;
		if (!all) {
		    while (optind < argc) {
			group = sa_get_group(argv[optind]);
			if (group != NULL) {
			    state = sa_get_group_attr(group, "state");
			    if (state == NULL ||
				strcmp(state, "enabled") == 0) {
				worklist = add_list(worklist, group, 0);
				if (verbose)
				    (void) printf(gettext("Stopping group "
								"\"%s\"\n"),
					    argv[optind]);
			    } else {
				ret = SMF_EXIT_OK;
			    }
			    if (state != NULL)
				sa_free_attr_string(state);
			}
			optind++;
		    }
		} else {
		    for (group = sa_get_group(NULL); group != NULL;
			    group = sa_get_next_group(group)) {
			state = sa_get_group_attr(group, "state");
			if (state == NULL || strcmp(state, "enabled") == 0)
			    worklist = add_list(worklist, group, 0);
			if (state != NULL)
			    sa_free_attr_string(state);
		    }
		}
		(void) disable_all_groups(worklist, 0);
		ret = sa_update_config();
	}
	if (worklist != NULL)
	    free_list(worklist);
	return (ret);
}

/*
 * remove_all_options(share, proto)
 *
 * Removes all options on a share.
 */

static void
remove_all_options(sa_share_t share, char *proto)
{
	sa_optionset_t optionset;
	sa_security_t security;
	sa_security_t prevsec = NULL;

	optionset = sa_get_optionset(share, proto);
	if (optionset != NULL)
	    (void) sa_destroy_optionset(optionset);
	for (security = sa_get_security(share, NULL, NULL);
	    security != NULL;
	    security = sa_get_next_security(security)) {
	    char *type;
		/*
		 * we walk through the list.  prevsec keeps the
		 * previous security so we can delete it without
		 * destroying the list.
		 */
	    if (prevsec != NULL) {
		/* remove the previously seen security */
		(void) sa_destroy_security(prevsec);
		/* set to NULL so we don't try multiple times */
		prevsec = NULL;
	    }
	    type = sa_get_security_attr(security, "type");
	    if (type != NULL) {
		/*
		 * if the security matches the specified protocol, we
		 * want to remove it. prevsec holds it until either
		 * the next pass or we fall out of the loop.
		 */
		if (strcmp(type, proto) == 0)
		    prevsec = security;
		sa_free_attr_string(type);
	    }
	}
	/* in case there is one left */
	if (prevsec != NULL)
	    (void) sa_destroy_security(prevsec);
}


/*
 * for legacy support, we need to handle the old syntax. This is what
 * we get if sharemgr is called with the name "share" rather than
 * sharemgr.
 */

static int
format_legacy_path(char *buff, int buffsize, char *proto, char *cmd)
{
	int err;

	err = snprintf(buff, buffsize, "/usr/lib/fs/%s/%s", proto, cmd);
	if (err > buffsize)
	    return (-1);
	return (0);
}


/*
 * check_legacy_cmd(proto, cmd)
 *
 * Check to see if the cmd exists in /usr/lib/fs/<proto>/<cmd> and is
 * executable.
 */

static int
check_legacy_cmd(char *path)
{
	struct stat st;
	int ret = 0;

	if (stat(path, &st) == 0) {
	    if (S_ISREG(st.st_mode) && st.st_mode & (S_IXUSR|S_IXGRP|S_IXOTH))
		ret = 1;
	}
	return (ret);
}

/*
 * run_legacy_command(proto, cmd, argv)
 *
 * we know the command exists, so attempt to execute it with all the
 * arguments. This implements full legacy share support for those
 * protocols that don't have plugin providers.
 */

static int
run_legacy_command(char *path, char *argv[])
{
	int ret;

	ret = execv(path, argv);
	if (ret < 0) {
	    switch (errno) {
	    case EACCES:
		ret = SA_NO_PERMISSION;
		break;
	    default:
		ret = SA_SYSTEM_ERR;
		break;
	    }
	}
	return (ret);
}

/*
 * out_share(out, group, proto, options)
 *
 * Display the share information in the format that the "share"
 * command has traditionally used.
 */

static void
out_share(FILE *out, sa_group_t group, char *proto, char *options)
{
	sa_share_t share;
	char resfmt[128];

	for (share = sa_get_share(group, NULL); share != NULL;
		share = sa_get_next_share(share)) {
	    char *path;
	    char *type;
	    char *resource;
	    char *description;
	    char *groupname;
	    char *sharedstate;
	    int shared = 1;
	    char *soptions;

	    sharedstate = sa_get_share_attr(share, "shared");
	    path = sa_get_share_attr(share, "path");
	    type = sa_get_share_attr(share, "type");
	    resource = sa_get_share_attr(share, "resource");
	    groupname = sa_get_group_attr(group, "name");

	    if (groupname != NULL && strcmp(groupname, "default") == 0) {
		sa_free_attr_string(groupname);
		groupname = NULL;
	    }
	    description = sa_get_share_description(share);
	    soptions = options;

	    if (sharedstate == NULL)
		shared = 0;

	    soptions = sa_proto_legacy_format(proto, share, 1);

	    if (shared) {
		/* only persisting share go here */
		(void) snprintf(resfmt, sizeof (resfmt), "%s%s%s",
			resource != NULL ? resource : "-",
			groupname != NULL ? "@" : "",
			groupname != NULL ? groupname : "");
		(void) fprintf(out, "%-14.14s  %s   %s   \"%s\"  \n",
			resfmt,
			path,
			(soptions != NULL && strlen(soptions) > 0) ?
					soptions : "rw",
			(description != NULL) ? description : "");
	    }

	    if (path != NULL)
		sa_free_attr_string(path);
	    if (type != NULL)
		sa_free_attr_string(type);
	    if (resource != NULL)
		sa_free_attr_string(resource);
	    if (groupname != NULL)
		sa_free_attr_string(groupname);
	    if (description != NULL)
		sa_free_share_description(description);
	    if (sharedstate != NULL)
		sa_free_attr_string(sharedstate);
	    if (soptions != NULL && soptions != options)
		sa_format_free(soptions);
	}
}

/*
 * output_legacy_file(out, proto)
 *
 * Walk all of the groups for the specified protocol and call
 * out_share() to format and write in the format displayed by the
 * "share" command with no arguments.
 */

static void
output_legacy_file(FILE *out, char *proto)
{
	sa_group_t group;

	for (group = sa_get_group(NULL); group != NULL;
		group = sa_get_next_group(group)) {
	    char *options;
	    char *zfs;

		/*
		 * get default options preformated, being careful to
		 * handle legacy shares differently from new style
		 * shares. Legacy share have options on the share.
		 */

	    zfs = sa_get_group_attr(group, "zfs");
	    if (zfs != NULL) {
		sa_group_t zgroup;
		sa_free_attr_string(zfs);
		options = sa_proto_legacy_format(proto, group, 1);
		for (zgroup = sa_get_sub_group(group); zgroup != NULL;
		    zgroup = sa_get_next_group(zgroup)) {

		    /* got a group, so display it */
		    out_share(out, zgroup, proto, options);
		}
	    } else {
		options = sa_proto_legacy_format(proto, group, 1);
		out_share(out, group, proto, options);
	    }
	    if (options != NULL)
		free(options);
	}
}

int
sa_legacy_share(int flags, int argc, char *argv[])
{
	char *protocol = "nfs";
	char *options = NULL;
	char *description = NULL;
	char *groupname = NULL;
	char *sharepath = NULL;
	char *resource = NULL;
	char *groupstatus = NULL;
	int persist = SA_SHARE_TRANSIENT;
	int argsused = 0;
	int c;
	int ret = SA_OK;
	int zfs = 0;
	int true_legacy = 0;
	int curtype = SA_SHARE_TRANSIENT;
	char cmd[MAXPATHLEN];
#ifdef lint
	flags = flags;
#endif

	while ((c = getopt(argc, argv, "?hF:d:o:p")) != EOF) {
	    switch (c) {
	    case 'd':
		description = optarg;
		argsused++;
		break;
	    case 'F':
		protocol = optarg;
		if (!sa_valid_protocol(protocol)) {
		    if (format_legacy_path(cmd, MAXPATHLEN,
			    protocol, "share") == 0 && check_legacy_cmd(cmd)) {
			true_legacy++;
		    } else {
			(void) fprintf(stderr,
					gettext("Invalid protocol specified:"
						"%s\n"),
				protocol);
			return (SA_INVALID_PROTOCOL);
		    }
		}
		break;
	    case 'o':
		options = optarg;
		argsused++;
		break;
	    case 'p':
		persist = SA_SHARE_PERMANENT;
		argsused++;
		break;
	    case 'h':
	    case '?':
	    default:
		(void) fprintf(stderr, gettext("usage: %s\n"),
						sa_get_usage(USAGE_SHARE));
		return (SA_OK);
	    }
	}

	/* have the info so construct what is needed */
	if (!argsused && optind == argc) {
	    /* display current info in share format */
	    (void) output_legacy_file(stdout, "nfs");
	} else {
	    sa_group_t group = NULL;
	    sa_share_t share;
	    char dir[MAXPATHLEN];

	    /* we are modifying the configuration */
	    if (optind == argc) {
		(void) fprintf(stderr, gettext("usage: %s\n"),
				sa_get_usage(USAGE_SHARE));
		return (SA_LEGACY_ERR);
	    }

	    if (true_legacy) {
		/* if still using legacy share/unshare, exec it */
		ret = run_legacy_command(cmd, argv);
		return (ret);
	    }

	    sharepath = argv[optind++];
	    if (optind < argc) {
		resource = argv[optind];
		groupname = strchr(resource, '@');
		if (groupname != NULL)
		    *groupname++ = '\0';
	    }
	    if (realpath(sharepath, dir) == NULL)
		ret = SA_BAD_PATH;
	    else
		sharepath = dir;
	    if (ret == SA_OK) {
		share = sa_find_share(sharepath);
	    } else {
		share = NULL;
	    }
	    if (groupname != NULL) {
		    ret = SA_NOT_ALLOWED;
	    } else if (ret == SA_OK) {
		char *legacygroup = "default";
		/*
		 * the legacy group is always present and zfs groups
		 * come and go.  zfs shares may be in sub-groups and
		 * the zfs share will already be in that group so it
		 * isn't an error.
		 */
		if (share != NULL) {
		/*
		 * if the share exists, then make sure it is one we
		 * want to handle.
		 */
		    group = sa_get_parent_group(share);
		} else {
		    group = sa_get_group(legacygroup);
		}
		if (group != NULL) {
		    groupstatus = group_status(group);
		    if (share == NULL) {
			share = sa_add_share(group, sharepath, persist, &ret);
			if (share == NULL && ret == SA_DUPLICATE_NAME) {
			    /* could be a ZFS path being started */
			    if (sa_zfs_is_shared(sharepath)) {
				ret = SA_OK;
				group = sa_get_group("zfs");
				if (group == NULL) {
				    /* this shouldn't happen */
				    ret = SA_CONFIG_ERR;
				}
				if (group != NULL) {
				    share = sa_add_share(group, sharepath,
							    persist, &ret);
				}
			    }
			}
		    } else {
			/*
			 * may want to change persist state, but the
			 * important thing is to change options unless
			 * this is ZFS where we just want to do the
			 * enable since everything is current.
			 */
			if (!sa_zfs_is_shared(sharepath)) {
			    char *type;
			    remove_all_options(share, protocol);
			    type = sa_get_share_attr(share, "type");
			    if (type != NULL &&
				strcmp(type, "transient") != 0) {
				curtype = SA_SHARE_PERMANENT;
			    }
			    if (type != NULL)
				sa_free_attr_string(type);
			    if (curtype != persist) {
				(void) sa_set_share_attr(share, "type",
					persist == SA_SHARE_PERMANENT ?
						"persist" : "transient");
			    }
			} else {
			    zfs++;
			}
		    }
		    if (!zfs) {
			/* have a group to hold this share path */
			if (ret == SA_OK && options != NULL &&
				strlen(options) > 0) {
			    ret = sa_parse_legacy_options(share,
							    options,
							    protocol);
			}
			if (ret == SA_OK && description != NULL)
			    ret = sa_set_share_description(share, description);
			if (ret == SA_OK && resource != NULL)
			    ret = sa_set_share_attr(share, "resource",
						    resource);
		    }
		    if (ret == SA_OK) {
			if (strcmp(groupstatus, "enabled") == 0)
			    ret = sa_enable_share(share, protocol);
			if (ret == SA_OK && persist == SA_SHARE_PERMANENT) {
			    (void) sa_update_legacy(share, protocol);
			}
			if (ret == SA_OK)
			    ret = sa_update_config();
		    }
		} else {
		    ret = SA_SYSTEM_ERR;
		}
	    }
	}
	if (ret != SA_OK) {
	    (void) fprintf(stderr, gettext("Could not share: %s: %s\n"),
				sharepath, sa_errorstr(ret));
	    ret = SA_LEGACY_ERR;

	}
	return (ret);
}

/*
 * sa_legacy_unshare(flags, argc, argv)
 *
 * Implements the original unshare command.
 */

int
sa_legacy_unshare(int flags, int argc, char *argv[])
{
	char *protocol = "nfs"; /* for now */
	char *options = NULL;
	char *sharepath = NULL;
	int persist = SA_SHARE_TRANSIENT;
	int argsused = 0;
	int c;
	int ret = SA_OK;
	int true_legacy = 0;
	char cmd[MAXPATHLEN];
#ifdef lint
	flags = flags;
	options = options;
#endif

	while ((c = getopt(argc, argv, "?hF:o:p")) != EOF) {
	    switch (c) {
	    case 'h':
	    case '?':
		break;
	    case 'F':
		protocol = optarg;
		if (!sa_valid_protocol(protocol)) {
		    if (format_legacy_path(cmd, MAXPATHLEN,
						protocol, "unshare") == 0 &&
			check_legacy_cmd(cmd)) {
			true_legacy++;
		    } else {
			(void) printf(gettext("Invalid file system name\n"));
			return (SA_INVALID_PROTOCOL);
		    }
		}
		break;
	    case 'o':
		options = optarg;
		argsused++;
		break;
	    case 'p':
		persist = SA_SHARE_PERMANENT;
		argsused++;
		break;
	    default:
		(void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_UNSHARE));
		return (SA_OK);
	    }
	}

	/* have the info so construct what is needed */
	if (optind == argc || (optind + 1) < argc) {
	    ret = SA_SYNTAX_ERR;
	} else {
	    sa_share_t share;
	    char dir[MAXPATHLEN];
	    if (true_legacy) {
		/* if still using legacy share/unshare, exec it */
		ret = run_legacy_command(cmd, argv);
		return (ret);
	    }
	    sharepath = argv[optind++];
	    if (realpath(sharepath, dir) == NULL) {
		ret = SA_NO_SUCH_PATH;
	    } else {
		sharepath = dir;
		share = sa_find_share(sharepath);
		if (share != NULL) {
		    ret = sa_disable_share(share, protocol);
		    if (ret == SA_OK) {
			if (persist == SA_SHARE_PERMANENT)
			    ret = sa_remove_share(share);
			ret = sa_update_config();
		    }
		} else {
		    ret = SA_NOT_SHARED;
		}
	    }
	}
	switch (ret) {
	default:
	    (void) printf("%s: %s\n", sharepath, sa_errorstr(ret));
	    ret = SA_LEGACY_ERR;
	    break;
	case SA_SYNTAX_ERR:
	    (void) printf(gettext("usage: %s\n"),
				sa_get_usage(USAGE_UNSHARE));
	    break;
	case SA_OK:
	    break;
	}
	return (ret);
}

/*
 * common commands that implement the sub-commands used by all
 * protcols. The entries are found via the lookup command
 */

static sa_command_t commands[] = {
	{"add-share", 0, sa_addshare, USAGE_ADD_SHARE, SVC_SET},
	{"create", 0, sa_create, USAGE_CREATE, SVC_SET|SVC_ACTION},
	{"delete", 0, sa_delete, USAGE_DELETE, SVC_SET|SVC_ACTION},
	{"disable", 0, sa_disable_group, USAGE_DISABLE, SVC_SET|SVC_ACTION},
	{"enable", 0, sa_enable_group, USAGE_ENABLE, SVC_SET|SVC_ACTION},
	{"list", 0, sa_list, USAGE_LIST},
	{"move-share", 0, sa_moveshare, USAGE_MOVE_SHARE, SVC_SET},
	{"remove-share", 0, sa_removeshare, USAGE_REMOVE_SHARE, SVC_SET},
	{"set", 0, sa_set, USAGE_SET, SVC_SET},
	{"set-share", 0, sa_set_share, USAGE_SET_SHARE, SVC_SET},
	{"show", 0, sa_show, USAGE_SHOW},
	{"share", 0, sa_legacy_share, USAGE_SHARE, SVC_SET|SVC_ACTION},
	{"start", CMD_NODISPLAY, sa_start_group, USAGE_START,
		SVC_SET|SVC_ACTION},
	{"stop", CMD_NODISPLAY, sa_stop_group, USAGE_STOP, SVC_SET|SVC_ACTION},
	{"unset", 0, sa_unset, USAGE_UNSET, SVC_SET},
	{"unshare", 0, sa_legacy_unshare, USAGE_UNSHARE, SVC_SET|SVC_ACTION},
	{NULL, 0, NULL, NULL}
};

static char *
sa_get_usage(sa_usage_t index)
{
	char *ret = NULL;
	switch (index) {
	case USAGE_ADD_SHARE:
	    ret = gettext("add-share [-nth] [-r resource-name] "
			    "[-d \"description text\"] -s sharepath group");
	    break;
	case USAGE_CREATE:
	    ret = gettext("create [-nvh] [-P proto [-p property=value]] group");
	    break;
	case USAGE_DELETE:
	    ret = gettext("delete [-nvh] [-P proto] [-f] group");
	    break;
	case USAGE_DISABLE:
	    ret = gettext("disable [-nvh] {-a | group ...}");
	    break;
	case USAGE_ENABLE:
	    ret = gettext("enable [-nvh] {-a | group ...}");
	    break;
	case USAGE_LIST:
	    ret = gettext("list [-vh] [-P proto]");
	    break;
	case USAGE_MOVE_SHARE:
	    ret = gettext("move-share [-nvh] -s sharepath destination-group");
	    break;
	case USAGE_REMOVE_SHARE:
	    ret = gettext("remove-share [-fnvh] -s sharepath group");
	    break;
	case USAGE_SET:
	    ret = gettext("set [-nvh] -P proto [-S optspace] "
				"[-p property=value]* [-s sharepath] group");
	    break;
	case USAGE_SET_SECURITY:
	    ret = gettext("set-security [-nvh] -P proto -S security-type "
			    "[-p property=value]* group");
	    break;
	case USAGE_SET_SHARE:
	    ret = gettext("set-share [-nh] [-r resource] "
			    "[-d \"description text\"] -s sharepath group");
	    break;
	case USAGE_SHOW:
	    ret = gettext("show [-pvxh] [-P proto] [group ...]");
	    break;
	case USAGE_SHARE:
	    ret = gettext("share [-F fstype] [-p] [-o optionlist]"
			    "[-d description] [pathname [resourcename]]");
	    break;
	case USAGE_START:
	    ret = gettext("start [-vh] [-P proto] {-a | group ...}");
	    break;
	case USAGE_STOP:
	    ret = gettext("stop [-vh] [-P proto] {-a | group ...}");
	    break;
	case USAGE_UNSET:
	    ret = gettext("unset [-nvh] -P proto [-S optspace] "
			    "[-p property]* group");
	    break;
	case USAGE_UNSET_SECURITY:
	    ret = gettext("unset-security [-nvh] -P proto -S security-type "
				"[-p property]* group");
	    break;
	case USAGE_UNSHARE:
	    ret = gettext("unshare [-F fstype] [-p] [-o optionlist] sharepath");
	    break;
	}
	return (ret);
}

/*
 * sa_lookup(cmd, proto)
 *
 * Lookup the sub-command. proto isn't currently used, but it may
 * eventually provide a way to provide protocol specific sub-commands.
 */

sa_command_t *
sa_lookup(char *cmd, char *proto)
{
	int i;
	size_t len;
#ifdef lint
	proto = proto;
#endif

	len = strlen(cmd);
	for (i = 0; commands[i].cmdname != NULL; i++) {
	    if (strncmp(cmd, commands[i].cmdname, len) == 0)
		return (&commands[i]);
	}
	return (NULL);
}

void
sub_command_help(char *proto)
{
	int i;
#ifdef lint
	proto = proto;
#endif

	(void) printf(gettext("\tsub-commands:\n"));
	for (i = 0; commands[i].cmdname != NULL; i++) {
	    if (!(commands[i].flags & (CMD_ALIAS|CMD_NODISPLAY)))
		(void) printf("\t%s\n",
				sa_get_usage((sa_usage_t)commands[i].cmdidx));
	}
}