File:  [DragonFly] / src / sbin / mount / mount.c
Revision 1.5: download - view: text, annotated - select for diffs
Mon Nov 3 19:51:05 2003 UTC (10 years, 9 months ago) by eirikn
Branches: MAIN
CVS tags: HEAD
Remove some __P macros in sbin that my script missed.

Reviewed by: Matthew Dillon <dillon@apollo.backplane.com>

    1: /*-
    2:  * Copyright (c) 1980, 1989, 1993, 1994
    3:  *	The Regents of the University of California.  All rights reserved.
    4:  *
    5:  * Redistribution and use in source and binary forms, with or without
    6:  * modification, are permitted provided that the following conditions
    7:  * are met:
    8:  * 1. Redistributions of source code must retain the above copyright
    9:  *    notice, this list of conditions and the following disclaimer.
   10:  * 2. Redistributions in binary form must reproduce the above copyright
   11:  *    notice, this list of conditions and the following disclaimer in the
   12:  *    documentation and/or other materials provided with the distribution.
   13:  * 3. All advertising materials mentioning features or use of this software
   14:  *    must display the following acknowledgement:
   15:  *	This product includes software developed by the University of
   16:  *	California, Berkeley and its contributors.
   17:  * 4. Neither the name of the University nor the names of its contributors
   18:  *    may be used to endorse or promote products derived from this software
   19:  *    without specific prior written permission.
   20:  *
   21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31:  * SUCH DAMAGE.
   32:  *
   33:  * @(#) Copyright (c) 1980, 1989, 1993, 1994 The Regents of the University of California.  All rights reserved.
   34:  * @(#)mount.c	8.25 (Berkeley) 5/8/95
   35:  * $FreeBSD: src/sbin/mount/mount.c,v 1.39.2.3 2001/08/01 08:26:23 obrien Exp $
   36:  * $DragonFly: src/sbin/mount/mount.c,v 1.5 2003/11/03 19:51:05 eirikn Exp $
   37:  */
   38: 
   39: #include <sys/param.h>
   40: #include <sys/mount.h>
   41: #include <sys/stat.h>
   42: #include <sys/wait.h>
   43: 
   44: #include <err.h>
   45: #include <errno.h>
   46: #include <fstab.h>
   47: #include <pwd.h>
   48: #include <signal.h>
   49: #include <stdio.h>
   50: #include <stdlib.h>
   51: #include <string.h>
   52: #include <unistd.h>
   53: 
   54: #include "extern.h"
   55: #include "mntopts.h"
   56: #include "pathnames.h"
   57: 
   58: /* `meta' options */
   59: #define MOUNT_META_OPTION_FSTAB		"fstab"	
   60: #define MOUNT_META_OPTION_CURRENT	"current"
   61: 
   62: int debug, fstab_style, verbose;
   63: 
   64: char   *catopt(char *, const char *);
   65: struct statfs
   66:        *getmntpt(const char *);
   67: int	hasopt(const char *, const char *);
   68: int	ismounted(struct fstab *, struct statfs *, int);
   69: int	isremountable(const char *);
   70: void	mangle(char *, int *, const char **);
   71: char   *update_options(char *, char *, int);
   72: int	mountfs(const char *, const char *, const char *,
   73: 			int, const char *, const char *);
   74: void	remopt(char *, const char *);
   75: void	prmount(struct statfs *);
   76: void	putfsent(const struct statfs *);
   77: void	usage(void);
   78: char   *flags2opts(int);
   79: 
   80: /* Map from mount options to printable formats. */
   81: static struct opt {
   82: 	int o_opt;
   83: 	const char *o_name;
   84: } optnames[] = {
   85: 	{ MNT_ASYNC,		"asynchronous" },
   86: 	{ MNT_EXPORTED,		"NFS exported" },
   87: 	{ MNT_LOCAL,		"local" },
   88: 	{ MNT_NOATIME,		"noatime" },
   89: 	{ MNT_NODEV,		"nodev" },
   90: 	{ MNT_NOEXEC,		"noexec" },
   91: 	{ MNT_NOSUID,		"nosuid" },
   92: 	{ MNT_NOSYMFOLLOW,	"nosymfollow" },
   93: 	{ MNT_QUOTA,		"with quotas" },
   94: 	{ MNT_RDONLY,		"read-only" },
   95: 	{ MNT_SYNCHRONOUS,	"synchronous" },
   96: 	{ MNT_UNION,		"union" },
   97: 	{ MNT_NOCLUSTERR,	"noclusterr" },
   98: 	{ MNT_NOCLUSTERW,	"noclusterw" },
   99: 	{ MNT_SUIDDIR,		"suiddir" },
  100: 	{ MNT_SOFTDEP,		"soft-updates" },
  101: 	{ 0, NULL }
  102: };
  103: 
  104: /*
  105:  * List of VFS types that can be remounted without becoming mounted on top
  106:  * of each other.
  107:  * XXX Is this list correct?
  108:  */
  109: static const char *
  110: remountable_fs_names[] = {
  111: 	"ufs", "ffs", "ext2fs",
  112: 	0
  113: };
  114: 
  115: int
  116: main(int argc, char **argv)
  117: {
  118: 	const char *mntfromname, **vfslist, *vfstype;
  119: 	struct fstab *fs;
  120: 	struct statfs *mntbuf;
  121: 	FILE *mountdfp;
  122: 	pid_t pid;
  123: 	int all, ch, i, init_flags, mntsize, rval, have_fstab;
  124: 	char *options;
  125: 
  126: 	all = init_flags = 0;
  127: 	options = NULL;
  128: 	vfslist = NULL;
  129: 	vfstype = "ufs";
  130: 	while ((ch = getopt(argc, argv, "adfo:prwt:uv")) != -1)
  131: 		switch (ch) {
  132: 		case 'a':
  133: 			all = 1;
  134: 			break;
  135: 		case 'd':
  136: 			debug = 1;
  137: 			break;
  138: 		case 'f':
  139: 			init_flags |= MNT_FORCE;
  140: 			break;
  141: 		case 'o':
  142: 			if (*optarg)
  143: 				options = catopt(options, optarg);
  144: 			break;
  145: 		case 'p':
  146: 			fstab_style = 1;
  147: 			verbose = 1;
  148: 			break;
  149: 		case 'r':
  150: 			options = catopt(options, "ro");
  151: 			break;
  152: 		case 't':
  153: 			if (vfslist != NULL)
  154: 				errx(1, "only one -t option may be specified");
  155: 			vfslist = makevfslist(optarg);
  156: 			vfstype = optarg;
  157: 			break;
  158: 		case 'u':
  159: 			init_flags |= MNT_UPDATE;
  160: 			break;
  161: 		case 'v':
  162: 			verbose = 1;
  163: 			break;
  164: 		case 'w':
  165: 			options = catopt(options, "noro");
  166: 			break;
  167: 		case '?':
  168: 		default:
  169: 			usage();
  170: 			/* NOTREACHED */
  171: 		}
  172: 	argc -= optind;
  173: 	argv += optind;
  174: 
  175: #define	BADTYPE(type)							\
  176: 	(strcmp(type, FSTAB_RO) &&					\
  177: 	    strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ))
  178: 
  179: 	rval = 0;
  180: 	switch (argc) {
  181: 	case 0:
  182: 		if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
  183: 			err(1, "getmntinfo");
  184: 		if (all) {
  185: 			while ((fs = getfsent()) != NULL) {
  186: 				if (BADTYPE(fs->fs_type))
  187: 					continue;
  188: 				if (checkvfsname(fs->fs_vfstype, vfslist))
  189: 					continue;
  190: 				if (hasopt(fs->fs_mntops, "noauto"))
  191: 					continue;
  192: 				if (!(init_flags & MNT_UPDATE) &&
  193: 				    ismounted(fs, mntbuf, mntsize))
  194: 					continue;
  195: 				if (mountfs(fs->fs_vfstype, fs->fs_spec,
  196: 				    fs->fs_file, init_flags, options,
  197: 				    fs->fs_mntops))
  198: 					rval = 1;
  199: 			}
  200: 		} else if (fstab_style) {
  201: 			for (i = 0; i < mntsize; i++) {
  202: 				if (checkvfsname(mntbuf[i].f_fstypename, vfslist))
  203: 					continue;
  204: 				putfsent(&mntbuf[i]);
  205: 			}
  206: 		} else {
  207: 			for (i = 0; i < mntsize; i++) {
  208: 				if (checkvfsname(mntbuf[i].f_fstypename,
  209: 				    vfslist))
  210: 					continue;
  211: 				prmount(&mntbuf[i]);
  212: 			}
  213: 		}
  214: 		exit(rval);
  215: 	case 1:
  216: 		if (vfslist != NULL)
  217: 			usage();
  218: 
  219: 		if (init_flags & MNT_UPDATE) {
  220: 			mntfromname = NULL;
  221: 			have_fstab = 0;
  222: 			if ((mntbuf = getmntpt(*argv)) == NULL)
  223: 				errx(1, "not currently mounted %s", *argv);
  224: 			/*
  225: 			 * Only get the mntflags from fstab if both mntpoint
  226: 			 * and mntspec are identical. Also handle the special
  227: 			 * case where just '/' is mounted and 'spec' is not
  228: 			 * identical with the one from fstab ('/dev' is missing
  229: 			 * in the spec-string at boot-time).
  230: 			 */
  231: 			if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
  232: 				if (strcmp(fs->fs_spec,
  233: 				    mntbuf->f_mntfromname) == 0 &&
  234: 				    strcmp(fs->fs_file,
  235: 				    mntbuf->f_mntonname) == 0) {
  236: 					have_fstab = 1;
  237: 					mntfromname = mntbuf->f_mntfromname;
  238: 				} else if (argv[0][0] == '/' &&
  239: 				    argv[0][1] == '\0') {
  240: 					fs = getfsfile("/");
  241: 					have_fstab = 1;
  242: 					mntfromname = fs->fs_spec;
  243: 				}
  244: 			}
  245: 			if (have_fstab) {
  246: 				options = update_options(options, fs->fs_mntops,
  247: 				    mntbuf->f_flags);
  248: 			} else {
  249: 				mntfromname = mntbuf->f_mntfromname;
  250: 				options = update_options(options, NULL,
  251: 				    mntbuf->f_flags);
  252: 			}
  253: 			rval = mountfs(mntbuf->f_fstypename, mntfromname,
  254: 			    mntbuf->f_mntonname, init_flags, options, 0);
  255: 			break;
  256: 		}
  257: 		rmslashes(*argv, *argv);
  258: 		if ((fs = getfsfile(*argv)) == NULL &&
  259: 		    (fs = getfsspec(*argv)) == NULL)
  260: 			errx(1, "%s: unknown special file or file system",
  261: 			    *argv);
  262: 		if (BADTYPE(fs->fs_type))
  263: 			errx(1, "%s has unknown file system type",
  264: 			    *argv);
  265: 		rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file,
  266: 		    init_flags, options, fs->fs_mntops);
  267: 		break;
  268: 	case 2:
  269: 		/*
  270: 		 * If -t flag has not been specified, the path cannot be
  271: 		 * found, spec contains either a ':' or a '@', and the
  272: 		 * spec is not a file with those characters, then assume
  273: 		 * that an NFS filesystem is being specified ala Sun.
  274: 		 */
  275: 		if (vfslist == NULL && strpbrk(argv[0], ":@") != NULL &&
  276: 		    access(argv[0], 0) == -1)
  277: 			vfstype = "nfs";
  278: 		rval = mountfs(vfstype,
  279: 		    argv[0], argv[1], init_flags, options, NULL);
  280: 		break;
  281: 	default:
  282: 		usage();
  283: 		/* NOTREACHED */
  284: 	}
  285: 
  286: 	/*
  287: 	 * If the mount was successfully, and done by root, tell mountd the
  288: 	 * good news.  Pid checks are probably unnecessary, but don't hurt.
  289: 	 */
  290: 	if (rval == 0 && getuid() == 0 &&
  291: 	    (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) {
  292: 		if (fscanf(mountdfp, "%d", &pid) == 1 &&
  293: 		     pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH)
  294: 			err(1, "signal mountd");
  295: 		(void)fclose(mountdfp);
  296: 	}
  297: 
  298: 	exit(rval);
  299: }
  300: 
  301: int
  302: ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
  303: {
  304: 	int i;
  305: 
  306: 	if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
  307: 		/* the root file system can always be remounted */
  308: 		return (0);
  309: 
  310: 	for (i = mntsize - 1; i >= 0; --i)
  311: 		if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 &&
  312: 		    (!isremountable(fs->fs_vfstype) ||
  313: 		     strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
  314: 			return (1);
  315: 	return (0);
  316: }
  317: 
  318: int
  319: isremountable(const char *vfsname)
  320: {
  321: 	const char **cp;
  322: 
  323: 	for (cp = remountable_fs_names; *cp; cp++)
  324: 		if (strcmp(*cp, vfsname) == 0)
  325: 			return (1);
  326: 	return (0);
  327: }
  328: 
  329: int
  330: hasopt(const char *mntopts, const char *option)
  331: {
  332: 	int negative, found;
  333: 	char *opt, *optbuf;
  334: 
  335: 	if (option[0] == 'n' && option[1] == 'o') {
  336: 		negative = 1;
  337: 		option += 2;
  338: 	} else
  339: 		negative = 0;
  340: 	optbuf = strdup(mntopts);
  341: 	found = 0;
  342: 	for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
  343: 		if (opt[0] == 'n' && opt[1] == 'o') {
  344: 			if (!strcasecmp(opt + 2, option))
  345: 				found = negative;
  346: 		} else if (!strcasecmp(opt, option))
  347: 			found = !negative;
  348: 	}
  349: 	free(optbuf);
  350: 	return (found);
  351: }
  352: 
  353: int
  354: mountfs(const char *vfstype, const char *spec, const char *name, int flags,
  355:         const char *options, const char *mntopts)
  356: {
  357: 	/* List of directories containing mount_xxx subcommands. */
  358: 	static const char *edirs[] = {
  359: 		_PATH_SBIN,
  360: 		_PATH_USRSBIN,
  361: 		NULL
  362: 	};
  363: 	const char *argv[100], **edir;
  364: 	struct statfs sf;
  365: 	pid_t pid;
  366: 	int argc, i, status;
  367: 	char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN];
  368: 
  369: #if __GNUC__
  370: 	(void)&optbuf;
  371: 	(void)&name;
  372: #endif
  373: 
  374: 	/* resolve the mountpoint with realpath(3) */
  375: 	(void)checkpath(name, mntpath);
  376: 	name = mntpath;
  377: 
  378: 	if (mntopts == NULL)
  379: 		mntopts = "";
  380: 	if (options == NULL) {
  381: 		if (*mntopts == '\0') {
  382: 			options = "rw";
  383: 		} else {
  384: 			options = mntopts;
  385: 			mntopts = "";
  386: 		}
  387: 	}
  388: 	optbuf = catopt(strdup(mntopts), options);
  389: 
  390: 	if (strcmp(name, "/") == 0)
  391: 		flags |= MNT_UPDATE;
  392: 	if (flags & MNT_FORCE)
  393: 		optbuf = catopt(optbuf, "force");
  394: 	if (flags & MNT_RDONLY)
  395: 		optbuf = catopt(optbuf, "ro");
  396: 	/*
  397: 	 * XXX
  398: 	 * The mount_mfs (newfs) command uses -o to select the
  399: 	 * optimization mode.  We don't pass the default "-o rw"
  400: 	 * for that reason.
  401: 	 */
  402: 	if (flags & MNT_UPDATE)
  403: 		optbuf = catopt(optbuf, "update");
  404: 
  405: 	argc = 0;
  406: 	argv[argc++] = vfstype;
  407: 	mangle(optbuf, &argc, argv);
  408: 	argv[argc++] = spec;
  409: 	argv[argc++] = name;
  410: 	argv[argc] = NULL;
  411: 
  412: 	if (debug) {
  413: 		(void)printf("exec: mount_%s", vfstype);
  414: 		for (i = 1; i < argc; i++)
  415: 			(void)printf(" %s", argv[i]);
  416: 		(void)printf("\n");
  417: 		return (0);
  418: 	}
  419: 
  420: 	switch (pid = fork()) {
  421: 	case -1:				/* Error. */
  422: 		warn("fork");
  423: 		free(optbuf);
  424: 		return (1);
  425: 	case 0:					/* Child. */
  426: 		if (strcmp(vfstype, "ufs") == 0)
  427: 			exit(mount_ufs(argc, (char * const *) argv));
  428: 
  429: 		/* Go find an executable. */
  430: 		for (edir = edirs; *edir; edir++) {
  431: 			(void)snprintf(execname,
  432: 			    sizeof(execname), "%s/mount_%s", *edir, vfstype);
  433: 			execv(execname, (char * const *)argv);
  434: 		}
  435: 		if (errno == ENOENT) {
  436: 			int len = 0;
  437: 			char *cp;
  438: 			for (edir = edirs; *edir; edir++)
  439: 				len += strlen(*edir) + 2;	/* ", " */
  440: 			if ((cp = malloc(len)) == NULL)
  441: 				errx(1, "malloc failed");
  442: 			cp[0] = '\0';
  443: 			for (edir = edirs; *edir; edir++) {
  444: 				strcat(cp, *edir);
  445: 				if (edir[1] != NULL)
  446: 					strcat(cp, ", ");
  447: 			}
  448: 			warn("exec mount_%s not found in %s", vfstype, cp);
  449: 		}
  450: 		exit(1);
  451: 		/* NOTREACHED */
  452: 	default:				/* Parent. */
  453: 		free(optbuf);
  454: 
  455: 		if (waitpid(pid, &status, 0) < 0) {
  456: 			warn("waitpid");
  457: 			return (1);
  458: 		}
  459: 
  460: 		if (WIFEXITED(status)) {
  461: 			if (WEXITSTATUS(status) != 0)
  462: 				return (WEXITSTATUS(status));
  463: 		} else if (WIFSIGNALED(status)) {
  464: 			warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]);
  465: 			return (1);
  466: 		}
  467: 
  468: 		if (verbose) {
  469: 			if (statfs(name, &sf) < 0) {
  470: 				warn("statfs %s", name);
  471: 				return (1);
  472: 			}
  473: 			if (fstab_style)
  474: 				putfsent(&sf);
  475: 			else
  476: 				prmount(&sf);
  477: 		}
  478: 		break;
  479: 	}
  480: 
  481: 	return (0);
  482: }
  483: 
  484: void
  485: prmount(struct statfs *sfp)
  486: {
  487: 	int flags;
  488: 	struct opt *o;
  489: 	struct passwd *pw;
  490: 
  491: 	(void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname,
  492: 	    sfp->f_fstypename);
  493: 
  494: 	flags = sfp->f_flags & MNT_VISFLAGMASK;
  495: 	for (o = optnames; flags && o->o_opt; o++)
  496: 		if (flags & o->o_opt) {
  497: 			(void)printf(", %s", o->o_name);
  498: 			flags &= ~o->o_opt;
  499: 		}
  500: 	if (sfp->f_owner) {
  501: 		(void)printf(", mounted by ");
  502: 		if ((pw = getpwuid(sfp->f_owner)) != NULL)
  503: 			(void)printf("%s", pw->pw_name);
  504: 		else
  505: 			(void)printf("%d", sfp->f_owner);
  506: 	}
  507: 	if (verbose) {
  508: 		if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0)
  509: 			(void)printf(", writes: sync %ld async %ld",
  510: 			    sfp->f_syncwrites, sfp->f_asyncwrites);
  511: 		if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0)
  512: 			(void)printf(", reads: sync %ld async %ld",
  513: 			    sfp->f_syncreads, sfp->f_asyncreads);
  514: 	}
  515: 	(void)printf(")\n");
  516: }
  517: 
  518: struct statfs *
  519: getmntpt(const char *name)
  520: {
  521: 	struct statfs *mntbuf;
  522: 	int i, mntsize;
  523: 
  524: 	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
  525: 	for (i = mntsize - 1; i >= 0; i--) {
  526: 		if (strcmp(mntbuf[i].f_mntfromname, name) == 0 ||
  527: 		    strcmp(mntbuf[i].f_mntonname, name) == 0)
  528: 			return (&mntbuf[i]);
  529: 	}
  530: 	return (NULL);
  531: }
  532: 
  533: char *
  534: catopt(char *s0, const char *s1)
  535: {
  536: 	size_t i;
  537: 	char *cp;
  538: 
  539: 	if (s1 == NULL || *s1 == '\0')
  540: 		return s0;
  541: 
  542: 	if (s0 && *s0) {
  543: 		i = strlen(s0) + strlen(s1) + 1 + 1;
  544: 		if ((cp = malloc(i)) == NULL)
  545: 			errx(1, "malloc failed");
  546: 		(void)snprintf(cp, i, "%s,%s", s0, s1);
  547: 	} else
  548: 		cp = strdup(s1);
  549: 
  550: 	if (s0)
  551: 		free(s0);
  552: 	return (cp);
  553: }
  554: 
  555: void
  556: mangle(char *options, int *argcp, const char **argv)
  557: {
  558: 	char *p, *s;
  559: 	int argc;
  560: 
  561: 	argc = *argcp;
  562: 	for (s = options; (p = strsep(&s, ",")) != NULL;)
  563: 		if (*p != '\0') {
  564: 			if (*p == '-') {
  565: 				argv[argc++] = p;
  566: 				p = strchr(p, '=');
  567: 				if (p) {
  568: 					*p = '\0';
  569: 					argv[argc++] = p+1;
  570: 				}
  571: 			} else if (strcmp(p, "rw") != 0) {
  572: 				argv[argc++] = "-o";
  573: 				argv[argc++] = p;
  574: 			}
  575: 		}
  576: 
  577: 	*argcp = argc;
  578: }
  579: 
  580: 
  581: char *
  582: update_options(char *opts, char *fstab, int curflags)
  583: {
  584: 	char *o, *p;
  585: 	char *cur;
  586: 	char *expopt, *newopt, *tmpopt;
  587: 
  588: 	if (opts == NULL)
  589: 		return strdup("");
  590: 
  591: 	/* remove meta options from list */
  592: 	remopt(fstab, MOUNT_META_OPTION_FSTAB);
  593: 	remopt(fstab, MOUNT_META_OPTION_CURRENT);
  594: 	cur = flags2opts(curflags);
  595: 
  596: 	/*
  597: 	 * Expand all meta-options passed to us first.
  598: 	 */
  599: 	expopt = NULL;
  600: 	for (p = opts; (o = strsep(&p, ",")) != NULL;) {
  601: 		if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
  602: 			expopt = catopt(expopt, fstab);
  603: 		else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
  604: 			expopt = catopt(expopt, cur);
  605: 		else
  606: 			expopt = catopt(expopt, o);
  607: 	}
  608: 	free(cur);
  609: 	free(opts);
  610: 
  611: 	/*
  612: 	 * Remove previous contradictory arguments. Given option "foo" we
  613: 	 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
  614: 	 * and "foo" - so we can deal with possible options like "notice".
  615: 	 */
  616: 	newopt = NULL;
  617: 	for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
  618: 		if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
  619: 			errx(1, "malloc failed");
  620: 	
  621: 		strcpy(tmpopt, "no");
  622: 		strcat(tmpopt, o);
  623: 		remopt(newopt, tmpopt);
  624: 		free(tmpopt);
  625: 
  626: 		if (strncmp("no", o, 2) == 0)
  627: 			remopt(newopt, o+2);
  628: 
  629: 		newopt = catopt(newopt, o);
  630: 	}
  631: 	free(expopt);
  632: 
  633: 	return newopt;
  634: }
  635: 
  636: void
  637: remopt(char *string, const char *opt)
  638: {
  639: 	char *o, *p, *r;
  640: 
  641: 	if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
  642: 		return;
  643: 
  644: 	r = string;
  645: 
  646: 	for (p = string; (o = strsep(&p, ",")) != NULL;) {
  647: 		if (strcmp(opt, o) != 0) {
  648: 			if (*r == ',' && *o != '\0')
  649: 				r++;
  650: 			while ((*r++ = *o++) != '\0')
  651: 			    ;
  652: 			*--r = ',';
  653: 		}
  654: 	}
  655: 	*r = '\0';
  656: }
  657: 
  658: void
  659: usage(void)
  660: {
  661: 
  662: 	(void)fprintf(stderr, "%s\n%s\n%s\n",
  663: "usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node",
  664: "       mount [-adfpruvw] [-t ufs | external_type]",
  665: "       mount [-dfpruvw] special | node");
  666: 	exit(1);
  667: }
  668: 
  669: void
  670: putfsent(const struct statfs *ent)
  671: {
  672: 	struct fstab *fst;
  673: 	char *opts;
  674:   
  675: 	opts = flags2opts(ent->f_flags);
  676: 	printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname,
  677: 	    ent->f_fstypename, opts);
  678: 	free(opts);
  679: 
  680: 	if ((fst = getfsspec(ent->f_mntfromname)))
  681: 		printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
  682: 	else if ((fst = getfsfile(ent->f_mntonname)))
  683: 		printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
  684: 	else if (strcmp(ent->f_fstypename, "ufs") == 0) {
  685: 		if (strcmp(ent->f_mntonname, "/") == 0)
  686: 			printf("\t1 1\n");
  687: 		else
  688: 			printf("\t2 2\n");
  689: 	} else
  690: 		printf("\t0 0\n");
  691: }
  692: 
  693: 
  694: char *
  695: flags2opts(int flags)
  696: {
  697: 	char *res;
  698: 
  699: 	res = NULL;
  700: 
  701: 	res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw");
  702: 
  703: 	if (flags & MNT_SYNCHRONOUS)	res = catopt(res, "sync");
  704: 	if (flags & MNT_NOEXEC)		res = catopt(res, "noexec");
  705: 	if (flags & MNT_NOSUID)		res = catopt(res, "nosuid");
  706: 	if (flags & MNT_NODEV)		res = catopt(res, "nodev");
  707: 	if (flags & MNT_UNION)		res = catopt(res, "union");
  708: 	if (flags & MNT_ASYNC)		res = catopt(res, "async");
  709: 	if (flags & MNT_NOATIME)	res = catopt(res, "noatime");
  710: 	if (flags & MNT_NOCLUSTERR)	res = catopt(res, "noclusterr");
  711: 	if (flags & MNT_NOCLUSTERW)	res = catopt(res, "noclusterw");
  712: 	if (flags & MNT_NOSYMFOLLOW)	res = catopt(res, "nosymfollow");
  713: 	if (flags & MNT_SUIDDIR)	res = catopt(res, "suiddir");
  714: 
  715: 	return res;
  716: }