1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 1999 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28*0Sstevel@tonic-gate /* All Rights Reserved */ 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate /* 31*0Sstevel@tonic-gate * Portions of this source code were derived from Berkeley 4.3 BSD 32*0Sstevel@tonic-gate * under license from the Regents of the University of California. 33*0Sstevel@tonic-gate */ 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate #include <stdio.h> 38*0Sstevel@tonic-gate #include <stdlib.h> 39*0Sstevel@tonic-gate #include <string.h> 40*0Sstevel@tonic-gate #include <unistd.h> 41*0Sstevel@tonic-gate #include "sharetab.h" 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate static int logging_specified(char *); 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate /* 46*0Sstevel@tonic-gate * Get an entry from the share table. 47*0Sstevel@tonic-gate * There should be at least 4 fields: 48*0Sstevel@tonic-gate * 49*0Sstevel@tonic-gate * pathname resource fstype options [ description ] 50*0Sstevel@tonic-gate * 51*0Sstevel@tonic-gate * A fifth field (description) is optional. 52*0Sstevel@tonic-gate * 53*0Sstevel@tonic-gate * Returns: 54*0Sstevel@tonic-gate * > 1 valid entry 55*0Sstevel@tonic-gate * = 0 end of file 56*0Sstevel@tonic-gate * < 0 error 57*0Sstevel@tonic-gate */ 58*0Sstevel@tonic-gate int 59*0Sstevel@tonic-gate getshare(fd, shp) 60*0Sstevel@tonic-gate FILE *fd; 61*0Sstevel@tonic-gate struct share **shp; 62*0Sstevel@tonic-gate { 63*0Sstevel@tonic-gate static char *line = NULL; 64*0Sstevel@tonic-gate static struct share *sh = NULL; 65*0Sstevel@tonic-gate char *p; 66*0Sstevel@tonic-gate char *lasts; 67*0Sstevel@tonic-gate char *w = " \t"; 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate if (line == NULL) { 70*0Sstevel@tonic-gate line = (char *)malloc(MAXBUFSIZE+1); 71*0Sstevel@tonic-gate if (line == NULL) 72*0Sstevel@tonic-gate return (-1); 73*0Sstevel@tonic-gate } 74*0Sstevel@tonic-gate if (sh == NULL) { 75*0Sstevel@tonic-gate sh = (struct share *)malloc(sizeof (*sh)); 76*0Sstevel@tonic-gate if (sh == NULL) 77*0Sstevel@tonic-gate return (-1); 78*0Sstevel@tonic-gate } 79*0Sstevel@tonic-gate 80*0Sstevel@tonic-gate p = fgets(line, MAXBUFSIZE, fd); 81*0Sstevel@tonic-gate if (p == NULL) 82*0Sstevel@tonic-gate return (0); 83*0Sstevel@tonic-gate line[strlen(line) - 1] = '\0'; 84*0Sstevel@tonic-gate 85*0Sstevel@tonic-gate sh->sh_path = (char *)strtok_r(p, w, &lasts); 86*0Sstevel@tonic-gate if (sh->sh_path == NULL) 87*0Sstevel@tonic-gate return (-3); 88*0Sstevel@tonic-gate sh->sh_res = (char *)strtok_r(NULL, w, &lasts); 89*0Sstevel@tonic-gate if (sh->sh_res == NULL) 90*0Sstevel@tonic-gate return (-3); 91*0Sstevel@tonic-gate sh->sh_fstype = (char *)strtok_r(NULL, w, &lasts); 92*0Sstevel@tonic-gate if (sh->sh_fstype == NULL) 93*0Sstevel@tonic-gate return (-3); 94*0Sstevel@tonic-gate sh->sh_opts = (char *)strtok_r(NULL, w, &lasts); 95*0Sstevel@tonic-gate if (sh->sh_opts == NULL) 96*0Sstevel@tonic-gate return (-3); 97*0Sstevel@tonic-gate sh->sh_descr = (char *)strtok_r(NULL, "", &lasts); 98*0Sstevel@tonic-gate if (sh->sh_descr == NULL) 99*0Sstevel@tonic-gate sh->sh_descr = ""; 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate *shp = sh; 102*0Sstevel@tonic-gate return (1); 103*0Sstevel@tonic-gate } 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate /* 106*0Sstevel@tonic-gate * Append an entry to the sharetab file. 107*0Sstevel@tonic-gate */ 108*0Sstevel@tonic-gate int 109*0Sstevel@tonic-gate putshare(fd, sh) 110*0Sstevel@tonic-gate FILE *fd; 111*0Sstevel@tonic-gate struct share *sh; 112*0Sstevel@tonic-gate { 113*0Sstevel@tonic-gate int r; 114*0Sstevel@tonic-gate 115*0Sstevel@tonic-gate if (fseek(fd, 0L, 2) < 0) 116*0Sstevel@tonic-gate return (-1); 117*0Sstevel@tonic-gate 118*0Sstevel@tonic-gate r = fprintf(fd, "%s\t%s\t%s\t%s\t%s\n", 119*0Sstevel@tonic-gate sh->sh_path, 120*0Sstevel@tonic-gate sh->sh_res, 121*0Sstevel@tonic-gate sh->sh_fstype, 122*0Sstevel@tonic-gate sh->sh_opts, 123*0Sstevel@tonic-gate sh->sh_descr); 124*0Sstevel@tonic-gate return (r); 125*0Sstevel@tonic-gate } 126*0Sstevel@tonic-gate 127*0Sstevel@tonic-gate /* 128*0Sstevel@tonic-gate * The entry corresponding to path is removed from the 129*0Sstevel@tonic-gate * sharetab file. The file is assumed to be locked. 130*0Sstevel@tonic-gate * Read the entries into a linked list of share structures 131*0Sstevel@tonic-gate * minus the entry to be removed. Then truncate the sharetab 132*0Sstevel@tonic-gate * file and write almost all of it back to the file from the 133*0Sstevel@tonic-gate * linked list. 134*0Sstevel@tonic-gate * 135*0Sstevel@tonic-gate * If logging information is requested then 'logging' is set 136*0Sstevel@tonic-gate * to non-zero if the entry is shared with logging enabled. 137*0Sstevel@tonic-gate * 138*0Sstevel@tonic-gate * Note: The file is assumed to be locked. 139*0Sstevel@tonic-gate */ 140*0Sstevel@tonic-gate int 141*0Sstevel@tonic-gate remshare(fd, path, logging) 142*0Sstevel@tonic-gate FILE *fd; 143*0Sstevel@tonic-gate char *path; 144*0Sstevel@tonic-gate int *logging; 145*0Sstevel@tonic-gate { 146*0Sstevel@tonic-gate struct share *sh_tmp; 147*0Sstevel@tonic-gate struct shl { /* the linked list */ 148*0Sstevel@tonic-gate struct shl *shl_next; 149*0Sstevel@tonic-gate struct share *shl_sh; 150*0Sstevel@tonic-gate }; 151*0Sstevel@tonic-gate struct shl *shl_head = NULL; 152*0Sstevel@tonic-gate struct shl *shl, *prev, *next; 153*0Sstevel@tonic-gate int res, remcnt; 154*0Sstevel@tonic-gate 155*0Sstevel@tonic-gate rewind(fd); 156*0Sstevel@tonic-gate remcnt = 0; 157*0Sstevel@tonic-gate shl = NULL; 158*0Sstevel@tonic-gate while ((res = getshare(fd, &sh_tmp)) > 0) { 159*0Sstevel@tonic-gate if (strcmp(path, sh_tmp->sh_path) == 0 || 160*0Sstevel@tonic-gate strcmp(path, sh_tmp->sh_res) == 0) { 161*0Sstevel@tonic-gate remcnt++; 162*0Sstevel@tonic-gate if (logging != NULL) 163*0Sstevel@tonic-gate *logging = logging_specified(sh_tmp->sh_opts); 164*0Sstevel@tonic-gate } else { 165*0Sstevel@tonic-gate prev = shl; 166*0Sstevel@tonic-gate shl = (struct shl *)malloc(sizeof (*shl)); 167*0Sstevel@tonic-gate if (shl == NULL) { 168*0Sstevel@tonic-gate res = -1; 169*0Sstevel@tonic-gate goto dealloc; 170*0Sstevel@tonic-gate } 171*0Sstevel@tonic-gate if (shl_head == NULL) 172*0Sstevel@tonic-gate shl_head = shl; 173*0Sstevel@tonic-gate else 174*0Sstevel@tonic-gate prev->shl_next = shl; 175*0Sstevel@tonic-gate shl->shl_next = NULL; 176*0Sstevel@tonic-gate shl->shl_sh = sharedup(sh_tmp); 177*0Sstevel@tonic-gate if (shl->shl_sh == NULL) { 178*0Sstevel@tonic-gate res = -3; 179*0Sstevel@tonic-gate goto dealloc; 180*0Sstevel@tonic-gate } 181*0Sstevel@tonic-gate } 182*0Sstevel@tonic-gate } 183*0Sstevel@tonic-gate if (res < 0) 184*0Sstevel@tonic-gate goto dealloc; 185*0Sstevel@tonic-gate if (remcnt == 0) { 186*0Sstevel@tonic-gate res = 1; /* nothing removed */ 187*0Sstevel@tonic-gate goto dealloc; 188*0Sstevel@tonic-gate } 189*0Sstevel@tonic-gate 190*0Sstevel@tonic-gate if (ftruncate(fileno(fd), 0) < 0) { 191*0Sstevel@tonic-gate res = -2; 192*0Sstevel@tonic-gate goto dealloc; 193*0Sstevel@tonic-gate } 194*0Sstevel@tonic-gate 195*0Sstevel@tonic-gate for (shl = shl_head; shl; shl = shl->shl_next) 196*0Sstevel@tonic-gate putshare(fd, shl->shl_sh); 197*0Sstevel@tonic-gate res = 1; 198*0Sstevel@tonic-gate 199*0Sstevel@tonic-gate dealloc: 200*0Sstevel@tonic-gate for (shl = shl_head; shl; shl = next) { 201*0Sstevel@tonic-gate /* 202*0Sstevel@tonic-gate * make sure we don't reference sharefree with NULL shl->shl_sh 203*0Sstevel@tonic-gate */ 204*0Sstevel@tonic-gate if (shl->shl_sh != NULL) 205*0Sstevel@tonic-gate sharefree(shl->shl_sh); 206*0Sstevel@tonic-gate next = shl->shl_next; 207*0Sstevel@tonic-gate free(shl); 208*0Sstevel@tonic-gate } 209*0Sstevel@tonic-gate return (res); 210*0Sstevel@tonic-gate } 211*0Sstevel@tonic-gate 212*0Sstevel@tonic-gate struct share * 213*0Sstevel@tonic-gate sharedup(sh) 214*0Sstevel@tonic-gate struct share *sh; 215*0Sstevel@tonic-gate { 216*0Sstevel@tonic-gate struct share *nsh; 217*0Sstevel@tonic-gate 218*0Sstevel@tonic-gate nsh = (struct share *)malloc(sizeof (*nsh)); 219*0Sstevel@tonic-gate if (nsh == NULL) 220*0Sstevel@tonic-gate return (NULL); 221*0Sstevel@tonic-gate 222*0Sstevel@tonic-gate (void) memset((char *)nsh, 0, sizeof (*nsh)); 223*0Sstevel@tonic-gate if (sh->sh_path) { 224*0Sstevel@tonic-gate nsh->sh_path = strdup(sh->sh_path); 225*0Sstevel@tonic-gate if (nsh->sh_path == NULL) 226*0Sstevel@tonic-gate goto alloc_failed; 227*0Sstevel@tonic-gate } 228*0Sstevel@tonic-gate 229*0Sstevel@tonic-gate if (sh->sh_res) { 230*0Sstevel@tonic-gate nsh->sh_res = strdup(sh->sh_res); 231*0Sstevel@tonic-gate if (nsh->sh_res == NULL) 232*0Sstevel@tonic-gate goto alloc_failed; 233*0Sstevel@tonic-gate } 234*0Sstevel@tonic-gate if (sh->sh_fstype) { 235*0Sstevel@tonic-gate nsh->sh_fstype = strdup(sh->sh_fstype); 236*0Sstevel@tonic-gate if (nsh->sh_fstype == NULL) 237*0Sstevel@tonic-gate goto alloc_failed; 238*0Sstevel@tonic-gate } 239*0Sstevel@tonic-gate if (sh->sh_opts) { 240*0Sstevel@tonic-gate nsh->sh_opts = strdup(sh->sh_opts); 241*0Sstevel@tonic-gate if (nsh->sh_opts == NULL) 242*0Sstevel@tonic-gate goto alloc_failed; 243*0Sstevel@tonic-gate } 244*0Sstevel@tonic-gate if (sh->sh_descr) { 245*0Sstevel@tonic-gate nsh->sh_descr = strdup(sh->sh_descr); 246*0Sstevel@tonic-gate if (nsh->sh_descr == NULL) 247*0Sstevel@tonic-gate goto alloc_failed; 248*0Sstevel@tonic-gate } 249*0Sstevel@tonic-gate return (nsh); 250*0Sstevel@tonic-gate 251*0Sstevel@tonic-gate alloc_failed: 252*0Sstevel@tonic-gate sharefree(nsh); 253*0Sstevel@tonic-gate return (NULL); 254*0Sstevel@tonic-gate } 255*0Sstevel@tonic-gate 256*0Sstevel@tonic-gate void 257*0Sstevel@tonic-gate sharefree(sh) 258*0Sstevel@tonic-gate struct share *sh; 259*0Sstevel@tonic-gate { 260*0Sstevel@tonic-gate if (sh->sh_path != NULL) 261*0Sstevel@tonic-gate free(sh->sh_path); 262*0Sstevel@tonic-gate if (sh->sh_res != NULL) 263*0Sstevel@tonic-gate free(sh->sh_res); 264*0Sstevel@tonic-gate if (sh->sh_fstype != NULL) 265*0Sstevel@tonic-gate free(sh->sh_fstype); 266*0Sstevel@tonic-gate if (sh->sh_opts != NULL) 267*0Sstevel@tonic-gate free(sh->sh_opts); 268*0Sstevel@tonic-gate if (sh->sh_descr != NULL) 269*0Sstevel@tonic-gate free(sh->sh_descr); 270*0Sstevel@tonic-gate free(sh); 271*0Sstevel@tonic-gate } 272*0Sstevel@tonic-gate 273*0Sstevel@tonic-gate /* 274*0Sstevel@tonic-gate * Return the value after "=" for option "opt" 275*0Sstevel@tonic-gate * in option string "optlist". Caller must 276*0Sstevel@tonic-gate * free returned value. 277*0Sstevel@tonic-gate */ 278*0Sstevel@tonic-gate char * 279*0Sstevel@tonic-gate getshareopt(optlist, opt) 280*0Sstevel@tonic-gate char *optlist, *opt; 281*0Sstevel@tonic-gate { 282*0Sstevel@tonic-gate char *p, *pe; 283*0Sstevel@tonic-gate char *b; 284*0Sstevel@tonic-gate char *bb; 285*0Sstevel@tonic-gate char *lasts; 286*0Sstevel@tonic-gate char *val = NULL; 287*0Sstevel@tonic-gate 288*0Sstevel@tonic-gate b = bb = strdup(optlist); 289*0Sstevel@tonic-gate if (b == NULL) 290*0Sstevel@tonic-gate return (NULL); 291*0Sstevel@tonic-gate 292*0Sstevel@tonic-gate while (p = (char *)strtok_r(b, ",", &lasts)) { 293*0Sstevel@tonic-gate b = NULL; 294*0Sstevel@tonic-gate if (pe = strchr(p, '=')) { 295*0Sstevel@tonic-gate *pe = '\0'; 296*0Sstevel@tonic-gate if (strcmp(opt, p) == 0) { 297*0Sstevel@tonic-gate val = strdup(pe + 1); 298*0Sstevel@tonic-gate goto done; 299*0Sstevel@tonic-gate } 300*0Sstevel@tonic-gate } 301*0Sstevel@tonic-gate if (strcmp(opt, p) == 0) { 302*0Sstevel@tonic-gate val = strdup(""); 303*0Sstevel@tonic-gate goto done; 304*0Sstevel@tonic-gate } 305*0Sstevel@tonic-gate } 306*0Sstevel@tonic-gate done: 307*0Sstevel@tonic-gate free(bb); 308*0Sstevel@tonic-gate return (val); 309*0Sstevel@tonic-gate } 310*0Sstevel@tonic-gate 311*0Sstevel@tonic-gate /* 312*0Sstevel@tonic-gate * Return 1 if the "log" option was specified in the optlist. 313*0Sstevel@tonic-gate * Return 0 otherwise. 314*0Sstevel@tonic-gate */ 315*0Sstevel@tonic-gate static int 316*0Sstevel@tonic-gate logging_specified(optlist) 317*0Sstevel@tonic-gate char *optlist; 318*0Sstevel@tonic-gate { 319*0Sstevel@tonic-gate char *p; 320*0Sstevel@tonic-gate char *b, *bb, *lasts; 321*0Sstevel@tonic-gate int specified = 0; 322*0Sstevel@tonic-gate 323*0Sstevel@tonic-gate b = bb = strdup(optlist); 324*0Sstevel@tonic-gate if (b == NULL) 325*0Sstevel@tonic-gate return (0); 326*0Sstevel@tonic-gate 327*0Sstevel@tonic-gate while (p = (char *)strtok_r(b, ",", &lasts)) { 328*0Sstevel@tonic-gate b = NULL; 329*0Sstevel@tonic-gate if (strncmp(p, "log", 3) == 0) 330*0Sstevel@tonic-gate specified++; 331*0Sstevel@tonic-gate } 332*0Sstevel@tonic-gate 333*0Sstevel@tonic-gate free(bb); 334*0Sstevel@tonic-gate return (specified ? 1 : 0); 335*0Sstevel@tonic-gate } 336