mount.c revision 175949
128671Ssteve/*- 21558Srgrimes * Copyright (c) 1980, 1989, 1993, 1994 31558Srgrimes * The Regents of the University of California. All rights reserved. 41558Srgrimes * 51558Srgrimes * Redistribution and use in source and binary forms, with or without 61558Srgrimes * modification, are permitted provided that the following conditions 71558Srgrimes * are met: 81558Srgrimes * 1. Redistributions of source code must retain the above copyright 91558Srgrimes * notice, this list of conditions and the following disclaimer. 101558Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111558Srgrimes * notice, this list of conditions and the following disclaimer in the 121558Srgrimes * documentation and/or other materials provided with the distribution. 131558Srgrimes * 4. Neither the name of the University nor the names of its contributors 141558Srgrimes * may be used to endorse or promote products derived from this software 151558Srgrimes * without specific prior written permission. 161558Srgrimes * 171558Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181558Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191558Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201558Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221558Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251558Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261558Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271558Srgrimes * SUCH DAMAGE. 281558Srgrimes */ 291558Srgrimes 301558Srgrimes#ifndef lint 3128671Sstevestatic const char copyright[] = 321558Srgrimes"@(#) Copyright (c) 1980, 1989, 1993, 1994\n\ 331558Srgrimes The Regents of the University of California. All rights reserved.\n"; 341558Srgrimes#endif /* not lint */ 351558Srgrimes 361558Srgrimes#ifndef lint 3728671Ssteve#if 0 3823678Speterstatic char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 3937425Scharnier#endif 4028671Sstevestatic const char rcsid[] = 4150476Speter "$FreeBSD: head/sbin/mount/mount.c 175949 2008-02-03 17:23:58Z matteo $"; 421558Srgrimes#endif /* not lint */ 431558Srgrimes 441558Srgrimes#include <sys/param.h> 451558Srgrimes#include <sys/mount.h> 4623805Sbde#include <sys/stat.h> 471558Srgrimes#include <sys/wait.h> 481558Srgrimes 4995289Smux#include <ctype.h> 501558Srgrimes#include <err.h> 511558Srgrimes#include <errno.h> 521558Srgrimes#include <fstab.h> 53117031Sgordon#include <paths.h> 5423678Speter#include <pwd.h> 551558Srgrimes#include <signal.h> 56123242Siedowse#include <stdint.h> 571558Srgrimes#include <stdio.h> 581558Srgrimes#include <stdlib.h> 591558Srgrimes#include <string.h> 601558Srgrimes#include <unistd.h> 61166439Spjd#include <libutil.h> 621558Srgrimes 6328671Ssteve#include "extern.h" 6452055Sphk#include "mntopts.h" 651558Srgrimes#include "pathnames.h" 661558Srgrimes 6746619Sjkoshy/* `meta' options */ 68125933Sgrog#define MOUNT_META_OPTION_FSTAB "fstab" 6946619Sjkoshy#define MOUNT_META_OPTION_CURRENT "current" 7046619Sjkoshy 7123805Sbdeint debug, fstab_style, verbose; 721558Srgrimes 7392882Simpchar *catopt(char *, const char *); 7492882Simpstruct statfs *getmntpt(const char *); 7592882Simpint hasopt(const char *, const char *); 7692882Simpint ismounted(struct fstab *, struct statfs *, int); 7792882Simpint isremountable(const char *); 78159473Sjmallettvoid mangle(char *, int *, char *[]); 7992882Simpchar *update_options(char *, char *, int); 8092882Simpint mountfs(const char *, const char *, const char *, 8192882Simp int, const char *, const char *); 8292882Simpvoid remopt(char *, const char *); 8392882Simpvoid prmount(struct statfs *); 84175949Smatteovoid putfsent(struct statfs *); 8592882Simpvoid usage(void); 8692882Simpchar *flags2opts(int); 871558Srgrimes 8837425Scharnier/* Map from mount options to printable formats. */ 891558Srgrimesstatic struct opt { 901558Srgrimes int o_opt; 911558Srgrimes const char *o_name; 921558Srgrimes} optnames[] = { 931558Srgrimes { MNT_ASYNC, "asynchronous" }, 941558Srgrimes { MNT_EXPORTED, "NFS exported" }, 951558Srgrimes { MNT_LOCAL, "local" }, 9618007Sdg { MNT_NOATIME, "noatime" }, 971558Srgrimes { MNT_NOEXEC, "noexec" }, 981558Srgrimes { MNT_NOSUID, "nosuid" }, 9935105Swosch { MNT_NOSYMFOLLOW, "nosymfollow" }, 1001558Srgrimes { MNT_QUOTA, "with quotas" }, 1011558Srgrimes { MNT_RDONLY, "read-only" }, 1021558Srgrimes { MNT_SYNCHRONOUS, "synchronous" }, 1031558Srgrimes { MNT_UNION, "union" }, 10429890Skato { MNT_NOCLUSTERR, "noclusterr" }, 10529890Skato { MNT_NOCLUSTERW, "noclusterw" }, 10631144Sjulian { MNT_SUIDDIR, "suiddir" }, 10734266Sjulian { MNT_SOFTDEP, "soft-updates" }, 108101205Srwatson { MNT_MULTILABEL, "multilabel" }, 109105118Srwatson { MNT_ACLS, "acls" }, 110163843Spjd { MNT_GJOURNAL, "gjournal" }, 11146619Sjkoshy { 0, NULL } 1121558Srgrimes}; 1131558Srgrimes 11428671Ssteve/* 11528671Ssteve * List of VFS types that can be remounted without becoming mounted on top 11628671Ssteve * of each other. 11728671Ssteve * XXX Is this list correct? 11828671Ssteve */ 11928671Sstevestatic const char * 12028671Ssteveremountable_fs_names[] = { 12169056Sphantom "ufs", "ffs", "ext2fs", 12228671Ssteve 0 12328671Ssteve}; 12428671Ssteve 125158400Smaximstatic const char userquotaeq[] = "userquota="; 126158400Smaximstatic const char groupquotaeq[] = "groupquota="; 127158400Smaxim 128152344Srodrigcstatic int 129152344Srodrigcuse_mountprog(const char *vfstype) 130152344Srodrigc{ 131152344Srodrigc /* XXX: We need to get away from implementing external mount 132152344Srodrigc * programs for every filesystem, and move towards having 133152344Srodrigc * each filesystem properly implement the nmount() system call. 134152344Srodrigc */ 135152344Srodrigc unsigned int i; 136152344Srodrigc const char *fs[] = { 137152778Savatar "cd9660", "mfs", "msdosfs", "nfs", "nfs4", "ntfs", 138171023Srafan "nwfs", "nullfs", "portalfs", "smbfs", "udf", "unionfs", 139152344Srodrigc NULL 140152344Srodrigc }; 141152344Srodrigc 142159473Sjmallett for (i = 0; fs[i] != NULL; ++i) { 143152344Srodrigc if (strcmp(vfstype, fs[i]) == 0) 144159473Sjmallett return (1); 145152344Srodrigc } 146152344Srodrigc 147159473Sjmallett return (0); 148152344Srodrigc} 149152344Srodrigc 150152344Srodrigcstatic int 151159473Sjmallettexec_mountprog(const char *name, const char *execname, char *const argv[]) 152152344Srodrigc{ 153152344Srodrigc pid_t pid; 154152344Srodrigc int status; 155152344Srodrigc 156152344Srodrigc switch (pid = fork()) { 157152344Srodrigc case -1: /* Error. */ 158152344Srodrigc warn("fork"); 159152344Srodrigc exit (1); 160152344Srodrigc case 0: /* Child. */ 161152344Srodrigc /* Go find an executable. */ 162152344Srodrigc execvP(execname, _PATH_SYSPATH, argv); 163152344Srodrigc if (errno == ENOENT) { 164152344Srodrigc warn("exec %s not found in %s", execname, 165152344Srodrigc _PATH_SYSPATH); 166152344Srodrigc } 167152344Srodrigc exit(1); 168152344Srodrigc default: /* Parent. */ 169152344Srodrigc if (waitpid(pid, &status, 0) < 0) { 170152344Srodrigc warn("waitpid"); 171152344Srodrigc return (1); 172152344Srodrigc } 173152344Srodrigc 174152344Srodrigc if (WIFEXITED(status)) { 175152344Srodrigc if (WEXITSTATUS(status) != 0) 176152344Srodrigc return (WEXITSTATUS(status)); 177152344Srodrigc } else if (WIFSIGNALED(status)) { 178152344Srodrigc warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 179152344Srodrigc return (1); 180152344Srodrigc } 181152344Srodrigc break; 182152344Srodrigc } 183152344Srodrigc 184152344Srodrigc return (0); 185152344Srodrigc} 186152344Srodrigc 187163672Srustatic int 188163672Sruspecified_ro(const char *arg) 189163671Sru{ 190163671Sru char *optbuf, *opt; 191163671Sru int ret = 0; 192163671Sru 193163671Sru optbuf = strdup(arg); 194163671Sru if (optbuf == NULL) 195163671Sru err(1, NULL); 196163671Sru 197163671Sru for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 198163671Sru if (strcmp(opt, "ro") == 0) { 199163671Sru ret = 1; 200163671Sru break; 201163671Sru } 202163671Sru } 203163671Sru free(optbuf); 204163671Sru return (ret); 205163671Sru} 206163671Sru 207166439Spjdstatic void 208166439Spjdrestart_mountd(void) 209166439Spjd{ 210166439Spjd struct pidfh *pfh; 211166439Spjd pid_t mountdpid; 212166439Spjd 213166439Spjd pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid); 214166439Spjd if (pfh != NULL) { 215166439Spjd /* Mountd is not running. */ 216166439Spjd pidfile_remove(pfh); 217166439Spjd return; 218166439Spjd } 219166439Spjd if (errno != EEXIST) { 220166439Spjd /* Cannot open pidfile for some reason. */ 221166439Spjd return; 222166439Spjd } 223166439Spjd /* We have mountd(8) PID in mountdpid varible, let's signal it. */ 224166439Spjd if (kill(mountdpid, SIGHUP) == -1) 225166439Spjd err(1, "signal mountd"); 226166439Spjd} 227166439Spjd 2281558Srgrimesint 229151042Srodrigcmain(int argc, char *argv[]) 2301558Srgrimes{ 23123678Speter const char *mntfromname, **vfslist, *vfstype; 2321558Srgrimes struct fstab *fs; 2331558Srgrimes struct statfs *mntbuf; 234163671Sru int all, ch, i, init_flags, late, mntsize, rval, have_fstab, ro; 23595289Smux char *cp, *ep, *options; 2361558Srgrimes 237160303Sdes all = init_flags = late = 0; 238163671Sru ro = 0; 239163671Sru options = NULL; 2401558Srgrimes vfslist = NULL; 2411558Srgrimes vfstype = "ufs"; 242163672Sru while ((ch = getopt(argc, argv, "adF:flo:prt:uvw")) != -1) 2431558Srgrimes switch (ch) { 2441558Srgrimes case 'a': 2451558Srgrimes all = 1; 2461558Srgrimes break; 2471558Srgrimes case 'd': 2481558Srgrimes debug = 1; 2491558Srgrimes break; 250113220Smdodd case 'F': 251113220Smdodd setfstab(optarg); 252113220Smdodd break; 2531558Srgrimes case 'f': 2541558Srgrimes init_flags |= MNT_FORCE; 2551558Srgrimes break; 256160303Sdes case 'l': 257160303Sdes late = 1; 258160303Sdes break; 2591558Srgrimes case 'o': 260163671Sru if (*optarg) { 261163671Sru options = catopt(options, optarg); 262163671Sru if (specified_ro(optarg)) 263163671Sru ro = 1; 264163671Sru } 2651558Srgrimes break; 26623805Sbde case 'p': 26723805Sbde fstab_style = 1; 26823805Sbde verbose = 1; 26923805Sbde break; 2701558Srgrimes case 'r': 27176198Sdd options = catopt(options, "ro"); 272163671Sru ro = 1; 2731558Srgrimes break; 2741558Srgrimes case 't': 2751558Srgrimes if (vfslist != NULL) 27637425Scharnier errx(1, "only one -t option may be specified"); 2771558Srgrimes vfslist = makevfslist(optarg); 2781558Srgrimes vfstype = optarg; 2791558Srgrimes break; 2801558Srgrimes case 'u': 2811558Srgrimes init_flags |= MNT_UPDATE; 2821558Srgrimes break; 2831558Srgrimes case 'v': 2841558Srgrimes verbose = 1; 2851558Srgrimes break; 2861558Srgrimes case 'w': 28776198Sdd options = catopt(options, "noro"); 2881558Srgrimes break; 2891558Srgrimes case '?': 2901558Srgrimes default: 2911558Srgrimes usage(); 2921558Srgrimes /* NOTREACHED */ 2931558Srgrimes } 2941558Srgrimes argc -= optind; 2951558Srgrimes argv += optind; 2961558Srgrimes 2971558Srgrimes#define BADTYPE(type) \ 2981558Srgrimes (strcmp(type, FSTAB_RO) && \ 2991558Srgrimes strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 3001558Srgrimes 301163671Sru if ((init_flags & MNT_UPDATE) && (ro == 0)) 302163671Sru options = catopt(options, "noro"); 303163671Sru 3041558Srgrimes rval = 0; 3051558Srgrimes switch (argc) { 3061558Srgrimes case 0: 30728671Ssteve if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 30828671Ssteve err(1, "getmntinfo"); 30928671Ssteve if (all) { 3101558Srgrimes while ((fs = getfsent()) != NULL) { 3111558Srgrimes if (BADTYPE(fs->fs_type)) 3121558Srgrimes continue; 31323678Speter if (checkvfsname(fs->fs_vfstype, vfslist)) 3141558Srgrimes continue; 31523678Speter if (hasopt(fs->fs_mntops, "noauto")) 31610288Sdg continue; 317160303Sdes if (hasopt(fs->fs_mntops, "late") && !late) 318160303Sdes continue; 31944811Sbde if (!(init_flags & MNT_UPDATE) && 32044811Sbde ismounted(fs, mntbuf, mntsize)) 32128671Ssteve continue; 322125194Sguido options = update_options(options, fs->fs_mntops, 323125194Sguido mntbuf->f_flags); 3241558Srgrimes if (mountfs(fs->fs_vfstype, fs->fs_spec, 32523805Sbde fs->fs_file, init_flags, options, 32623805Sbde fs->fs_mntops)) 32723805Sbde rval = 1; 3281558Srgrimes } 32928671Ssteve } else if (fstab_style) { 33017243Sjkh for (i = 0; i < mntsize; i++) { 33123678Speter if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 33217243Sjkh continue; 33323805Sbde putfsent(&mntbuf[i]); 33417243Sjkh } 33523805Sbde } else { 3361558Srgrimes for (i = 0; i < mntsize; i++) { 33723805Sbde if (checkvfsname(mntbuf[i].f_fstypename, 33823805Sbde vfslist)) 3391558Srgrimes continue; 34023678Speter prmount(&mntbuf[i]); 3411558Srgrimes } 3421558Srgrimes } 3431558Srgrimes exit(rval); 3441558Srgrimes case 1: 3451558Srgrimes if (vfslist != NULL) 3461558Srgrimes usage(); 3471558Srgrimes 348124201Sanholt rmslashes(*argv, *argv); 3491558Srgrimes if (init_flags & MNT_UPDATE) { 35052678Sgreen mntfromname = NULL; 35152678Sgreen have_fstab = 0; 3521558Srgrimes if ((mntbuf = getmntpt(*argv)) == NULL) 35352678Sgreen errx(1, "not currently mounted %s", *argv); 35452678Sgreen /* 35552678Sgreen * Only get the mntflags from fstab if both mntpoint 35652678Sgreen * and mntspec are identical. Also handle the special 35752678Sgreen * case where just '/' is mounted and 'spec' is not 35852678Sgreen * identical with the one from fstab ('/dev' is missing 35952678Sgreen * in the spec-string at boot-time). 36052678Sgreen */ 36146619Sjkoshy if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 36252678Sgreen if (strcmp(fs->fs_spec, 36352678Sgreen mntbuf->f_mntfromname) == 0 && 36452678Sgreen strcmp(fs->fs_file, 36552678Sgreen mntbuf->f_mntonname) == 0) { 36652678Sgreen have_fstab = 1; 36752678Sgreen mntfromname = mntbuf->f_mntfromname; 36852678Sgreen } else if (argv[0][0] == '/' && 36952678Sgreen argv[0][1] == '\0') { 37052678Sgreen fs = getfsfile("/"); 37152678Sgreen have_fstab = 1; 37252678Sgreen mntfromname = fs->fs_spec; 37352678Sgreen } 37452678Sgreen } 37552678Sgreen if (have_fstab) { 37646619Sjkoshy options = update_options(options, fs->fs_mntops, 37746619Sjkoshy mntbuf->f_flags); 37846619Sjkoshy } else { 37923678Speter mntfromname = mntbuf->f_mntfromname; 38046619Sjkoshy options = update_options(options, NULL, 38146619Sjkoshy mntbuf->f_flags); 38246619Sjkoshy } 38323678Speter rval = mountfs(mntbuf->f_fstypename, mntfromname, 38423678Speter mntbuf->f_mntonname, init_flags, options, 0); 38523678Speter break; 3861558Srgrimes } 38723678Speter if ((fs = getfsfile(*argv)) == NULL && 38823678Speter (fs = getfsspec(*argv)) == NULL) 389102231Strhodes errx(1, "%s: unknown special file or file system", 39023678Speter *argv); 39123678Speter if (BADTYPE(fs->fs_type)) 392102231Strhodes errx(1, "%s has unknown file system type", 39323678Speter *argv); 39423678Speter rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 39523678Speter init_flags, options, fs->fs_mntops); 3961558Srgrimes break; 3971558Srgrimes case 2: 3981558Srgrimes /* 39952678Sgreen * If -t flag has not been specified, the path cannot be 40095289Smux * found, spec contains either a ':' or a '@', then assume 401102231Strhodes * that an NFS file system is being specified ala Sun. 40295289Smux * Check if the hostname contains only allowed characters 40395289Smux * to reduce false positives. IPv6 addresses containing 40495289Smux * ':' will be correctly parsed only if the separator is '@'. 40595289Smux * The definition of a valid hostname is taken from RFC 1034. 4061558Srgrimes */ 407123162Siedowse if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 408123162Siedowse (ep = strchr(argv[0], ':')) != NULL)) { 40995318Smux if (*ep == '@') { 41095318Smux cp = ep + 1; 41195318Smux ep = cp + strlen(cp); 41295318Smux } else 41395318Smux cp = argv[0]; 41495289Smux while (cp != ep) { 41595289Smux if (!isdigit(*cp) && !isalpha(*cp) && 41695289Smux *cp != '.' && *cp != '-' && *cp != ':') 41795289Smux break; 41895289Smux cp++; 41995289Smux } 42095289Smux if (cp == ep) 42195289Smux vfstype = "nfs"; 42295289Smux } 4231558Srgrimes rval = mountfs(vfstype, 4241558Srgrimes argv[0], argv[1], init_flags, options, NULL); 4251558Srgrimes break; 4261558Srgrimes default: 4271558Srgrimes usage(); 4281558Srgrimes /* NOTREACHED */ 4291558Srgrimes } 4301558Srgrimes 4311558Srgrimes /* 4321558Srgrimes * If the mount was successfully, and done by root, tell mountd the 433166439Spjd * good news. 4341558Srgrimes */ 435166439Spjd if (rval == 0 && getuid() == 0) 436166439Spjd restart_mountd(); 4371558Srgrimes 4381558Srgrimes exit(rval); 4391558Srgrimes} 4401558Srgrimes 4411558Srgrimesint 442151042Srodrigcismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 44328671Ssteve{ 444154512Spjd char realfsfile[PATH_MAX]; 44528671Ssteve int i; 44628671Ssteve 44728671Ssteve if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 448102231Strhodes /* the root file system can always be remounted */ 44928671Ssteve return (0); 45028671Ssteve 451154512Spjd /* The user may have specified a symlink in fstab, resolve the path */ 452154512Spjd if (realpath(fs->fs_file, realfsfile) == NULL) { 453154512Spjd /* Cannot resolve the path, use original one */ 454154512Spjd strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 455154512Spjd } 456154512Spjd 45728671Ssteve for (i = mntsize - 1; i >= 0; --i) 458154512Spjd if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 45928671Ssteve (!isremountable(fs->fs_vfstype) || 46028671Ssteve strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 46128671Ssteve return (1); 46228671Ssteve return (0); 46328671Ssteve} 46428671Ssteve 46528671Ssteveint 466151042Srodrigcisremountable(const char *vfsname) 46728671Ssteve{ 46828671Ssteve const char **cp; 46928671Ssteve 47028671Ssteve for (cp = remountable_fs_names; *cp; cp++) 47128671Ssteve if (strcmp(*cp, vfsname) == 0) 47228671Ssteve return (1); 47328671Ssteve return (0); 47428671Ssteve} 47528671Ssteve 47628671Ssteveint 477151042Srodrigchasopt(const char *mntopts, const char *option) 47823678Speter{ 47923678Speter int negative, found; 48023678Speter char *opt, *optbuf; 48123678Speter 48223678Speter if (option[0] == 'n' && option[1] == 'o') { 48323678Speter negative = 1; 48423678Speter option += 2; 48523678Speter } else 48623678Speter negative = 0; 48723678Speter optbuf = strdup(mntopts); 48823678Speter found = 0; 48923678Speter for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 49023678Speter if (opt[0] == 'n' && opt[1] == 'o') { 49123678Speter if (!strcasecmp(opt + 2, option)) 49223678Speter found = negative; 49323678Speter } else if (!strcasecmp(opt, option)) 49423678Speter found = !negative; 49523678Speter } 49623678Speter free(optbuf); 49723678Speter return (found); 49823678Speter} 49923678Speter 50023678Speterint 501151042Srodrigcmountfs(const char *vfstype, const char *spec, const char *name, int flags, 502151042Srodrigc const char *options, const char *mntopts) 5031558Srgrimes{ 504152344Srodrigc char *argv[100]; 5051558Srgrimes struct statfs sf; 506152344Srodrigc int argc, i, ret; 507118580Simp char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 5081558Srgrimes 50952055Sphk /* resolve the mountpoint with realpath(3) */ 51052055Sphk (void)checkpath(name, mntpath); 5111558Srgrimes name = mntpath; 5121558Srgrimes 51323678Speter if (mntopts == NULL) 51423678Speter mntopts = ""; 5151558Srgrimes optbuf = catopt(strdup(mntopts), options); 5161558Srgrimes 5171558Srgrimes if (strcmp(name, "/") == 0) 5181558Srgrimes flags |= MNT_UPDATE; 5191558Srgrimes if (flags & MNT_FORCE) 5201558Srgrimes optbuf = catopt(optbuf, "force"); 5211558Srgrimes if (flags & MNT_RDONLY) 5221558Srgrimes optbuf = catopt(optbuf, "ro"); 5231558Srgrimes /* 5241558Srgrimes * XXX 5251558Srgrimes * The mount_mfs (newfs) command uses -o to select the 52637425Scharnier * optimization mode. We don't pass the default "-o rw" 5271558Srgrimes * for that reason. 5281558Srgrimes */ 5291558Srgrimes if (flags & MNT_UPDATE) 5301558Srgrimes optbuf = catopt(optbuf, "update"); 5311558Srgrimes 53277577Sru /* Compatibility glue. */ 533166526Srodrigc if (strcmp(vfstype, "msdos") == 0) { 534166526Srodrigc warnx( 535166526Srodrigc "Using \"-t msdosfs\", since \"-t msdos\" is deprecated."); 53677577Sru vfstype = "msdosfs"; 537166526Srodrigc } 53877577Sru 539144133Scperciva /* Construct the name of the appropriate mount command */ 540144133Scperciva (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 541144133Scperciva 5421558Srgrimes argc = 0; 543144133Scperciva argv[argc++] = execname; 5441558Srgrimes mangle(optbuf, &argc, argv); 545152344Srodrigc argv[argc++] = strdup(spec); 546152344Srodrigc argv[argc++] = strdup(name); 5471558Srgrimes argv[argc] = NULL; 5481558Srgrimes 5491558Srgrimes if (debug) { 550164266Srodrigc if (use_mountprog(vfstype)) 551164266Srodrigc printf("exec: mount_%s", vfstype); 552164266Srodrigc else 553164266Srodrigc printf("mount -t %s", vfstype); 5541558Srgrimes for (i = 1; i < argc; i++) 5551558Srgrimes (void)printf(" %s", argv[i]); 5561558Srgrimes (void)printf("\n"); 5571558Srgrimes return (0); 5581558Srgrimes } 5591558Srgrimes 560152668Srodrigc if (use_mountprog(vfstype)) { 561152344Srodrigc ret = exec_mountprog(name, execname, argv); 562152344Srodrigc } else { 563152344Srodrigc ret = mount_fs(vfstype, argc, argv); 564152344Srodrigc } 5651558Srgrimes 566152344Srodrigc free(optbuf); 5671558Srgrimes 568152344Srodrigc if (verbose) { 569152344Srodrigc if (statfs(name, &sf) < 0) { 570152344Srodrigc warn("statfs %s", name); 5711558Srgrimes return (1); 5721558Srgrimes } 573152344Srodrigc if (fstab_style) 574152344Srodrigc putfsent(&sf); 575152344Srodrigc else 576152344Srodrigc prmount(&sf); 5771558Srgrimes } 5781558Srgrimes 5791558Srgrimes return (0); 5801558Srgrimes} 5811558Srgrimes 5821558Srgrimesvoid 583151042Srodrigcprmount(struct statfs *sfp) 58423678Speter{ 585151043Srodrigc int flags; 586151043Srodrigc unsigned int i; 5871558Srgrimes struct opt *o; 58823678Speter struct passwd *pw; 5891558Srgrimes 59052036Sn_hibma (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 59152036Sn_hibma sfp->f_fstypename); 5921558Srgrimes 59323678Speter flags = sfp->f_flags & MNT_VISFLAGMASK; 59452036Sn_hibma for (o = optnames; flags && o->o_opt; o++) 5951558Srgrimes if (flags & o->o_opt) { 59652036Sn_hibma (void)printf(", %s", o->o_name); 5971558Srgrimes flags &= ~o->o_opt; 5981558Srgrimes } 599125339Spjd /* 600125339Spjd * Inform when file system is mounted by an unprivileged user 601125339Spjd * or privileged non-root user. 602125339Spjd */ 603125365Snectar if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 60452036Sn_hibma (void)printf(", mounted by "); 60523678Speter if ((pw = getpwuid(sfp->f_owner)) != NULL) 60623678Speter (void)printf("%s", pw->pw_name); 60723678Speter else 60823678Speter (void)printf("%d", sfp->f_owner); 60923678Speter } 61065023Ssheldonh if (verbose) { 61165023Ssheldonh if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 612123242Siedowse (void)printf(", writes: sync %ju async %ju", 613123242Siedowse (uintmax_t)sfp->f_syncwrites, 614123242Siedowse (uintmax_t)sfp->f_asyncwrites); 61565023Ssheldonh if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 616123242Siedowse (void)printf(", reads: sync %ju async %ju", 617123242Siedowse (uintmax_t)sfp->f_syncreads, 618123242Siedowse (uintmax_t)sfp->f_asyncreads); 619123162Siedowse if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 620123162Siedowse printf(", fsid "); 621123162Siedowse for (i = 0; i < sizeof(sfp->f_fsid); i++) 622123162Siedowse printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 623123162Siedowse } 62465023Ssheldonh } 62552036Sn_hibma (void)printf(")\n"); 6261558Srgrimes} 6271558Srgrimes 6281558Srgrimesstruct statfs * 629151042Srodrigcgetmntpt(const char *name) 6301558Srgrimes{ 6311558Srgrimes struct statfs *mntbuf; 6321558Srgrimes int i, mntsize; 6331558Srgrimes 6341558Srgrimes mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 63552678Sgreen for (i = mntsize - 1; i >= 0; i--) { 6361558Srgrimes if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 6371558Srgrimes strcmp(mntbuf[i].f_mntonname, name) == 0) 6381558Srgrimes return (&mntbuf[i]); 63952678Sgreen } 6401558Srgrimes return (NULL); 6411558Srgrimes} 6421558Srgrimes 6431558Srgrimeschar * 644151042Srodrigccatopt(char *s0, const char *s1) 6451558Srgrimes{ 6461558Srgrimes size_t i; 6471558Srgrimes char *cp; 6481558Srgrimes 64946619Sjkoshy if (s1 == NULL || *s1 == '\0') 650159473Sjmallett return (s0); 65146619Sjkoshy 6521558Srgrimes if (s0 && *s0) { 6531558Srgrimes i = strlen(s0) + strlen(s1) + 1 + 1; 6541558Srgrimes if ((cp = malloc(i)) == NULL) 65537425Scharnier errx(1, "malloc failed"); 6561558Srgrimes (void)snprintf(cp, i, "%s,%s", s0, s1); 6571558Srgrimes } else 6581558Srgrimes cp = strdup(s1); 6591558Srgrimes 6601558Srgrimes if (s0) 6611558Srgrimes free(s0); 6621558Srgrimes return (cp); 6631558Srgrimes} 6641558Srgrimes 6651558Srgrimesvoid 666159473Sjmallettmangle(char *options, int *argcp, char *argv[]) 6671558Srgrimes{ 6681558Srgrimes char *p, *s; 6691558Srgrimes int argc; 6701558Srgrimes 6711558Srgrimes argc = *argcp; 6721558Srgrimes for (s = options; (p = strsep(&s, ",")) != NULL;) 67346619Sjkoshy if (*p != '\0') { 674152465Srodrigc if (strcmp(p, "noauto") == 0) { 675152465Srodrigc /* 676152465Srodrigc * Do not pass noauto option to nmount(). 677152465Srodrigc * or external mount program. noauto is 678152465Srodrigc * only used to prevent mounting a filesystem 679152465Srodrigc * when 'mount -a' is specified, and is 680152465Srodrigc * not a real mount option. 681152465Srodrigc */ 682152465Srodrigc continue; 683160303Sdes } else if (strcmp(p, "late") == 0) { 684160303Sdes /* 685160303Sdes * "late" is used to prevent certain file 686160303Sdes * systems from being mounted before late 687160303Sdes * in the boot cycle; for instance, 688160303Sdes * loopback NFS mounts can't be mounted 689160303Sdes * before mountd starts. 690160303Sdes */ 691160303Sdes continue; 692152732Srodrigc } else if (strcmp(p, "userquota") == 0) { 693152732Srodrigc continue; 694158400Smaxim } else if (strncmp(p, userquotaeq, 695158400Smaxim sizeof(userquotaeq) - 1) == 0) { 696158400Smaxim continue; 697152732Srodrigc } else if (strcmp(p, "groupquota") == 0) { 698152732Srodrigc continue; 699158400Smaxim } else if (strncmp(p, groupquotaeq, 700158400Smaxim sizeof(groupquotaeq) - 1) == 0) { 701158400Smaxim continue; 702152465Srodrigc } else if (*p == '-') { 7031558Srgrimes argv[argc++] = p; 7041558Srgrimes p = strchr(p, '='); 705123268Strhodes if (p != NULL) { 7061558Srgrimes *p = '\0'; 7071558Srgrimes argv[argc++] = p+1; 7081558Srgrimes } 709153038Srodrigc } else { 710152344Srodrigc argv[argc++] = strdup("-o"); 7111558Srgrimes argv[argc++] = p; 7121558Srgrimes } 71346619Sjkoshy } 7141558Srgrimes 7151558Srgrimes *argcp = argc; 7161558Srgrimes} 7171558Srgrimes 71846619Sjkoshy 71946619Sjkoshychar * 720159473Sjmallettupdate_options(char *opts, char *fstab, int curflags) 72146619Sjkoshy{ 72246619Sjkoshy char *o, *p; 72346619Sjkoshy char *cur; 72446619Sjkoshy char *expopt, *newopt, *tmpopt; 72546619Sjkoshy 72646619Sjkoshy if (opts == NULL) 727159473Sjmallett return (strdup("")); 72846619Sjkoshy 72946619Sjkoshy /* remove meta options from list */ 73046619Sjkoshy remopt(fstab, MOUNT_META_OPTION_FSTAB); 73146619Sjkoshy remopt(fstab, MOUNT_META_OPTION_CURRENT); 73246619Sjkoshy cur = flags2opts(curflags); 73346619Sjkoshy 73446619Sjkoshy /* 73546619Sjkoshy * Expand all meta-options passed to us first. 73646619Sjkoshy */ 73746619Sjkoshy expopt = NULL; 73846619Sjkoshy for (p = opts; (o = strsep(&p, ",")) != NULL;) { 73946619Sjkoshy if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 74046619Sjkoshy expopt = catopt(expopt, fstab); 74146619Sjkoshy else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 74246619Sjkoshy expopt = catopt(expopt, cur); 74346619Sjkoshy else 74446619Sjkoshy expopt = catopt(expopt, o); 74546619Sjkoshy } 74646619Sjkoshy free(cur); 74746619Sjkoshy free(opts); 74846619Sjkoshy 74946619Sjkoshy /* 75046619Sjkoshy * Remove previous contradictory arguments. Given option "foo" we 75146619Sjkoshy * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 75246619Sjkoshy * and "foo" - so we can deal with possible options like "notice". 75346619Sjkoshy */ 75446619Sjkoshy newopt = NULL; 75546619Sjkoshy for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 75646619Sjkoshy if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 75746619Sjkoshy errx(1, "malloc failed"); 758125933Sgrog 75946619Sjkoshy strcpy(tmpopt, "no"); 76046619Sjkoshy strcat(tmpopt, o); 76146619Sjkoshy remopt(newopt, tmpopt); 76246619Sjkoshy free(tmpopt); 76346619Sjkoshy 76446619Sjkoshy if (strncmp("no", o, 2) == 0) 76546619Sjkoshy remopt(newopt, o+2); 76646619Sjkoshy 76746619Sjkoshy newopt = catopt(newopt, o); 76846619Sjkoshy } 76946619Sjkoshy free(expopt); 77046619Sjkoshy 771159473Sjmallett return (newopt); 77246619Sjkoshy} 77346619Sjkoshy 7741558Srgrimesvoid 775159473Sjmallettremopt(char *string, const char *opt) 77646619Sjkoshy{ 77746619Sjkoshy char *o, *p, *r; 77846619Sjkoshy 77946619Sjkoshy if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 78046619Sjkoshy return; 78146619Sjkoshy 78246619Sjkoshy r = string; 78346619Sjkoshy 78446619Sjkoshy for (p = string; (o = strsep(&p, ",")) != NULL;) { 78546619Sjkoshy if (strcmp(opt, o) != 0) { 78646619Sjkoshy if (*r == ',' && *o != '\0') 78746619Sjkoshy r++; 78846619Sjkoshy while ((*r++ = *o++) != '\0') 78946619Sjkoshy ; 79046619Sjkoshy *--r = ','; 79146619Sjkoshy } 79246619Sjkoshy } 79346619Sjkoshy *r = '\0'; 79446619Sjkoshy} 79546619Sjkoshy 79646619Sjkoshyvoid 797159473Sjmallettusage(void) 7981558Srgrimes{ 7991558Srgrimes 80037425Scharnier (void)fprintf(stderr, "%s\n%s\n%s\n", 801160303Sdes"usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 802141611Sru" mount [-dfpruvw] special | node", 803141611Sru" mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 8041558Srgrimes exit(1); 8051558Srgrimes} 80617243Sjkh 80717243Sjkhvoid 808175949Smatteoputfsent(struct statfs *ent) 80917243Sjkh{ 81023805Sbde struct fstab *fst; 81146619Sjkoshy char *opts; 812168698Sphk int l; 813125933Sgrog 81446619Sjkoshy opts = flags2opts(ent->f_flags); 815156229Skeramida 816175949Smatteo if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 817175949Smatteo strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 818175949Smatteo strcpy(ent->f_mntfromname, (strnstr(ent->f_mntfromname, ":", 8) 819175949Smatteo +1)); 820175949Smatteo } 821175949Smatteo 822156229Skeramida /* 823156229Skeramida * "rw" is not a real mount option; this is why we print NULL as "rw" 824156229Skeramida * if opts is still NULL here. 825156229Skeramida */ 826168698Sphk l = strlen(ent->f_mntfromname); 827168698Sphk printf("%s%s%s%s", ent->f_mntfromname, 828168698Sphk l < 8 ? "\t" : "", 829168698Sphk l < 16 ? "\t" : "", 830168698Sphk l < 24 ? "\t" : " "); 831168698Sphk l = strlen(ent->f_mntonname); 832168698Sphk printf("%s%s%s%s", ent->f_mntonname, 833168698Sphk l < 8 ? "\t" : "", 834168698Sphk l < 16 ? "\t" : "", 835168698Sphk l < 24 ? "\t" : " "); 836168698Sphk printf("%s\t", ent->f_fstypename); 837168698Sphk if (opts == NULL) { 838168698Sphk printf("%s\t", "rw"); 839168698Sphk } else { 840168698Sphk l = strlen(opts); 841168698Sphk printf("%s%s", opts, 842168698Sphk l < 8 ? "\t" : " "); 843168698Sphk } 84446619Sjkoshy free(opts); 84517243Sjkh 84628671Ssteve if ((fst = getfsspec(ent->f_mntfromname))) 84723805Sbde printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 84828671Ssteve else if ((fst = getfsfile(ent->f_mntonname))) 84923805Sbde printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 85056038Sgreen else if (strcmp(ent->f_fstypename, "ufs") == 0) { 85156038Sgreen if (strcmp(ent->f_mntonname, "/") == 0) 85256038Sgreen printf("\t1 1\n"); 85356038Sgreen else 85456038Sgreen printf("\t2 2\n"); 85556038Sgreen } else 85623805Sbde printf("\t0 0\n"); 85717243Sjkh} 85846619Sjkoshy 85946619Sjkoshy 86046619Sjkoshychar * 861159473Sjmallettflags2opts(int flags) 86246619Sjkoshy{ 86346619Sjkoshy char *res; 86446619Sjkoshy 86546619Sjkoshy res = NULL; 86646619Sjkoshy 867155997Srodrigc if (flags & MNT_RDONLY) res = catopt(res, "ro"); 86846619Sjkoshy if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 86946619Sjkoshy if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 87046619Sjkoshy if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 87146619Sjkoshy if (flags & MNT_UNION) res = catopt(res, "union"); 87246619Sjkoshy if (flags & MNT_ASYNC) res = catopt(res, "async"); 87346619Sjkoshy if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 87446619Sjkoshy if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 87546619Sjkoshy if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 87646619Sjkoshy if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 87746619Sjkoshy if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 878101205Srwatson if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 879105118Srwatson if (flags & MNT_ACLS) res = catopt(res, "acls"); 880163843Spjd if (flags & MNT_GJOURNAL) res = catopt(res, "gjournal"); 88146619Sjkoshy 882159473Sjmallett return (res); 88346619Sjkoshy} 884