xref: /netbsd-src/external/bsd/am-utils/dist/amd/ops_pcfs.c (revision 8bae5d409deb915cf7c8f0539fae22ff2cb8a313)
1 /*	$NetBSD: ops_pcfs.c,v 1.1.1.3 2015/01/17 16:34:15 christos Exp $	*/
2 
3 /*
4  * Copyright (c) 1997-2014 Erez Zadok
5  * Copyright (c) 1990 Jan-Simon Pendry
6  * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
7  * Copyright (c) 1990 The Regents of the University of California.
8  * All rights reserved.
9  *
10  * This code is derived from software contributed to Berkeley by
11  * Jan-Simon Pendry at Imperial College, London.
12  *
13  * Redistribution and use in source and binary forms, with or without
14  * modification, are permitted provided that the following conditions
15  * are met:
16  * 1. Redistributions of source code must retain the above copyright
17  *    notice, this list of conditions and the following disclaimer.
18  * 2. Redistributions in binary form must reproduce the above copyright
19  *    notice, this list of conditions and the following disclaimer in the
20  *    documentation and/or other materials provided with the distribution.
21  * 3. Neither the name of the University nor the names of its contributors
22  *    may be used to endorse or promote products derived from this software
23  *    without specific prior written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35  * SUCH DAMAGE.
36  *
37  *
38  * File: am-utils/amd/ops_pcfs.c
39  *
40  */
41 
42 /*
43  * PC (MS-DOS) file system
44  */
45 
46 #ifdef HAVE_CONFIG_H
47 # include <config.h>
48 #endif /* HAVE_CONFIG_H */
49 #include <am_defs.h>
50 #include <amd.h>
51 
52 /* forward definitions */
53 static char *pcfs_match(am_opts *fo);
54 static int pcfs_mount(am_node *am, mntfs *mf);
55 static int pcfs_umount(am_node *am, mntfs *mf);
56 
57 /*
58  * Ops structure
59  */
60 am_ops pcfs_ops =
61 {
62   "pcfs",
63   pcfs_match,
64   0,				/* pcfs_init */
65   pcfs_mount,
66   pcfs_umount,
67   amfs_error_lookup_child,
68   amfs_error_mount_child,
69   amfs_error_readdir,
70   0,				/* pcfs_readlink */
71   0,				/* pcfs_mounted */
72   0,				/* pcfs_umounted */
73   amfs_generic_find_srvr,
74   0,				/* pcfs_get_wchan */
75   FS_MKMNT | FS_UBACKGROUND | FS_AMQINFO,	/* nfs_fs_flags */
76 #ifdef HAVE_FS_AUTOFS
77   AUTOFS_PCFS_FS_FLAGS,
78 #endif /* HAVE_FS_AUTOFS */
79 };
80 
81 
82 
83 /*
84  * PCFS needs remote filesystem.
85  */
86 static char *
pcfs_match(am_opts * fo)87 pcfs_match(am_opts *fo)
88 {
89   if (!fo->opt_dev) {
90     plog(XLOG_USER, "pcfs: no source device specified");
91     return 0;
92   }
93   dlog("PCFS: mounting device \"%s\" on \"%s\"", fo->opt_dev, fo->opt_fs);
94 
95   /*
96    * Determine magic cookie to put in mtab
97    */
98   return xstrdup(fo->opt_dev);
99 }
100 
101 
102 static int
mount_pcfs(char * mntdir,char * fs_name,char * opts,int on_autofs)103 mount_pcfs(char *mntdir, char *fs_name, char *opts, int on_autofs)
104 {
105   pcfs_args_t pcfs_args;
106   mntent_t mnt;
107   int flags;
108 #if defined(HAVE_PCFS_ARGS_T_MASK) || defined(HAVE_PCFS_ARGS_T_DIRMASK)
109   int mask;
110 #endif /* defined(HAVE_PCFS_ARGS_T_MASK) || defined(HAVE_PCFS_ARGS_T_DIRMASK) */
111 #if defined(HAVE_PCFS_ARGS_T_UID) || defined(HAVE_PCFS_ARGS_T_UID)
112   char *str;
113 #endif /* defined(HAVE_PCFS_ARGS_T_UID) || defined(HAVE_PCFS_ARGS_T_UID) */
114 
115   /*
116    * Figure out the name of the file system type.
117    */
118   MTYPE_TYPE type = MOUNT_TYPE_PCFS;
119 
120   memset((voidp) &pcfs_args, 0, sizeof(pcfs_args)); /* Paranoid */
121 
122   /*
123    * Fill in the mount structure
124    */
125   memset((voidp) &mnt, 0, sizeof(mnt));
126   mnt.mnt_dir = mntdir;
127   mnt.mnt_fsname = fs_name;
128   mnt.mnt_type = MNTTAB_TYPE_PCFS;
129   mnt.mnt_opts = opts;
130 
131   flags = compute_mount_flags(&mnt);
132 #ifdef HAVE_FS_AUTOFS
133   if (on_autofs)
134     flags |= autofs_compute_mount_flags(&mnt);
135 #endif /* HAVE_FS_AUTOFS */
136   if (amuDebug(D_TRACE))
137     plog(XLOG_DEBUG, "mount_pcfs: flags=0x%x", (u_int) flags);
138 
139 #ifdef HAVE_PCFS_ARGS_T_FSPEC
140   pcfs_args.fspec = fs_name;
141 #endif /* HAVE_PCFS_ARGS_T_FSPEC */
142 
143 #ifdef HAVE_PCFS_ARGS_T_MASK
144   pcfs_args.mask = 0777;	/* this may be the msdos file modes */
145   if ((mask = hasmntval(&mnt, MNTTAB_OPT_MASK)) > 0)
146     pcfs_args.mask = mask;
147   if (amuDebug(D_TRACE))
148     plog(XLOG_DEBUG, "mount_pcfs: mask=%o (octal)", (u_int) pcfs_args.mask);
149 #endif /* HAVE_PCFS_ARGS_T_MASK */
150 
151 #ifdef HAVE_PCFS_ARGS_T_DIRMASK
152   pcfs_args.dirmask = 0777;    /* this may be the msdos dir modes */
153   if ((mask = hasmntval(&mnt, MNTTAB_OPT_DIRMASK)) > 0)
154     pcfs_args.dirmask = mask;
155   if (amuDebug(D_TRACE))
156     plog(XLOG_DEBUG, "mount_pcfs: dirmask=%o (octal)", (u_int) pcfs_args.dirmask);
157 #endif /* HAVE_PCFS_ARGS_T_DIRMASK */
158 
159 #ifdef HAVE_PCFS_ARGS_T_UID
160   pcfs_args.uid = 0;		/* default to root */
161   if ((str = hasmntstr(&mnt, MNTTAB_OPT_USER)) != NULL) {
162     struct passwd *pw;
163     if ((pw = getpwnam(str)) != NULL)
164       pcfs_args.uid = pw->pw_uid;
165     else		 /* maybe used passed a UID number, not user name */
166       pcfs_args.uid = atoi(str); /* atoi returns '0' if it failed */
167     XFREE(str);
168   }
169   if (amuDebug(D_TRACE))
170     plog(XLOG_DEBUG, "mount_pcfs: uid=%d", (int) pcfs_args.uid);
171 #endif /* HAVE_PCFS_ARGS_T_UID */
172 
173 #ifdef HAVE_PCFS_ARGS_T_GID
174   pcfs_args.gid = 0;		/* default to wheel/root group */
175   if ((str = hasmntstr(&mnt, MNTTAB_OPT_GROUP)) != NULL) {
176     struct group *gr;
177     if ((gr = getgrnam(str)) != NULL)
178       pcfs_args.gid = gr->gr_gid;
179     else		/* maybe used passed a GID number, not group name */
180       pcfs_args.gid = atoi(str); /* atoi returns '0' if it failed */
181     XFREE(str);
182   }
183   if (amuDebug(D_TRACE))
184     plog(XLOG_DEBUG, "mount_pcfs: gid=%d", (int) pcfs_args.gid);
185 #endif /* HAVE_PCFS_ARGS_T_GID */
186 
187 #ifdef HAVE_PCFS_ARGS_T_SECONDSWEST
188   pcfs_args.secondswest = 0;	/* XXX: fill in correct values */
189 #endif /* HAVE_PCFS_ARGS_T_SECONDSWEST */
190 #ifdef HAVE_PCFS_ARGS_T_DSTTIME
191   pcfs_args.dsttime = 0;	/* XXX: fill in correct values */
192 #endif /* HAVE_PCFS_ARGS_T_DSTTIME */
193 
194   /*
195    * Call generic mount routine
196    */
197   return mount_fs(&mnt, flags, (caddr_t) & pcfs_args, 0, type, 0, NULL, mnttab_file_name, on_autofs);
198 }
199 
200 
201 static int
pcfs_mount(am_node * am,mntfs * mf)202 pcfs_mount(am_node *am, mntfs *mf)
203 {
204   int on_autofs = mf->mf_flags & MFF_ON_AUTOFS;
205   int error;
206 
207   error = mount_pcfs(mf->mf_mount, mf->mf_info, mf->mf_mopts, on_autofs);
208   if (error) {
209     errno = error;
210     plog(XLOG_ERROR, "mount_pcfs: %m");
211     return error;
212   }
213 
214   return 0;
215 }
216 
217 
218 static int
pcfs_umount(am_node * am,mntfs * mf)219 pcfs_umount(am_node *am, mntfs *mf)
220 {
221   int unmount_flags = (mf->mf_flags & MFF_ON_AUTOFS) ? AMU_UMOUNT_AUTOFS : 0;
222 
223   return UMOUNT_FS(mf->mf_mount, mnttab_file_name, unmount_flags);
224 }
225