mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 17:18:32 +00:00
1. Enhanced syntax for mount(8). The -o option now supports two 'meta'
options:
-o fstab brings in filesystem options specified in /etc/fstab
-o current incorporates the current set of options for the file
system
The rightmost option wins in the case of conflicting options being
specified.
E.g.:-
# mount -u -o current,nosuid /home
will preserve the current mount options while adding the 'nosuid' flag.
2. Rewording of manual page to be hopefully clearer; small -Wall
cleanups.
Thanks to David Malone for his patience and willingness to work
multiple patches on request.
PR: bin/6399
Submitted by: David Malone <dwmalone@maths.tcd.ie>
This commit is contained in:
Joseph Koshy
parent
36cfb417de
commit
18af604492
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=46619
|
|
@ -30,7 +30,7 @@
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)mount.8 8.8 (Berkeley) 6/16/94
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.\" $Id: mount.8,v 1.24 1998/10/16 00:06:56 des Exp $
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.\" $Id: mount.8,v 1.25 1999/04/08 13:59:42 ghelmer Exp $
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.\"
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.Dd June 16, 1994
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.Dt MOUNT 8
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|
|
@ -101,6 +101,8 @@ caution).
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Options are specified with a
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.Fl o
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flag followed by a comma separated string of options.
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In case of conflicting options being specified, the rightmost option
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takes effect.
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The following options are available:
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.Bl -tag -width indent
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.It async
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|
|
@ -112,12 +114,23 @@ This is a
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flag to set,
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and should not be used unless you are prepared to recreate the file
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system should your system crash.
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.It current
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When used with the
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.Fl u
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flag, this is the same as specifying the options currently in effect for
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the mounted filesystem.
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.It force
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The same as
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.Fl f ;
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forces the revocation of write access when trying to downgrade
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a filesystem mount status from read-write to read-only. Also
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forces the R/W mount of an unclean filesystem (dangerous; use with caution).
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.It fstab
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When used with the
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.Fl u
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flag, this is the same as specifying all the options listed in the
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.Xr fstab 5
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file for the filesystem.
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.It noatime
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Do not update the file access time when reading from a file. This option
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is useful on filesystems where there are large numbers of files and
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|
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@ -287,13 +300,9 @@ An attempt to change from read-write to read-only will fail if any
|
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files on the filesystem are currently open for writing unless the
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.Fl f
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flag is also specified.
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The set of options is determined by first extracting the options
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for the file system from the
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.Xr fstab 5
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table,
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then applying any options specified by the
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.Fl o
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argument,
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The set of options is determined by applying the options specified
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in the argument to
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.Fl o
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and finally applying the
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.Fl r
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or
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|
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@ -42,7 +42,7 @@ static const char copyright[] =
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static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95";
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#endif
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static const char rcsid[] =
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"$Id: mount.c,v 1.28 1998/07/06 07:12:38 charnier Exp $";
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"$Id: mount.c,v 1.29 1999/03/16 22:26:51 bde Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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@ -63,6 +63,10 @@ static const char rcsid[] =
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#include "extern.h"
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#include "pathnames.h"
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/* `meta' options */
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#define MOUNT_META_OPTION_FSTAB "fstab"
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#define MOUNT_META_OPTION_CURRENT "current"
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int debug, fstab_style, verbose;
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char *catopt __P((char *, const char *));
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@ -72,11 +76,14 @@ int hasopt __P((const char *, const char *));
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int ismounted __P((struct fstab *, struct statfs *, int));
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int isremountable __P((const char *));
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void mangle __P((char *, int *, const char **));
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char *update_options __P((char *, char *, int));
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int mountfs __P((const char *, const char *, const char *,
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int, const char *, const char *));
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void remopt __P((char *, const char *));
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void prmount __P((struct statfs *));
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void putfsent __P((const struct statfs *));
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void usage __P((void));
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char *flags2opts __P((int));
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/* Map from mount options to printable formats. */
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static struct opt {
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@ -99,7 +106,7 @@ static struct opt {
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{ MNT_NOCLUSTERW, "noclusterw" },
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{ MNT_SUIDDIR, "suiddir" },
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{ MNT_SOFTDEP, "soft-updates" },
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{ NULL }
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{ 0, NULL }
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};
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/*
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@ -224,10 +231,15 @@ main(argc, argv)
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errx(1,
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"unknown special file or file system %s",
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*argv);
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if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL)
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if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
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mntfromname = fs->fs_spec;
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else
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options = update_options(options, fs->fs_mntops,
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mntbuf->f_flags);
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} else {
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mntfromname = mntbuf->f_mntfromname;
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options = update_options(options, NULL,
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mntbuf->f_flags);
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}
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rval = mountfs(mntbuf->f_fstypename, mntfromname,
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mntbuf->f_mntonname, init_flags, options, 0);
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break;
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@ -524,6 +536,9 @@ catopt(s0, s1)
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size_t i;
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char *cp;
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if (s1 == NULL || *s1 == '\0')
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return s0;
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if (s0 && *s0) {
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i = strlen(s0) + strlen(s1) + 1 + 1;
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if ((cp = malloc(i)) == NULL)
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@ -548,7 +563,7 @@ mangle(options, argcp, argv)
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argc = *argcp;
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for (s = options; (p = strsep(&s, ",")) != NULL;)
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if (*p != '\0')
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if (*p != '\0') {
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if (*p == '-') {
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argv[argc++] = p;
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p = strchr(p, '=');
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@ -560,10 +575,97 @@ mangle(options, argcp, argv)
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argv[argc++] = "-o";
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argv[argc++] = p;
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}
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}
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*argcp = argc;
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}
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char *
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update_options(opts, fstab, curflags)
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char *opts;
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char *fstab;
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int curflags;
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{
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char *o, *p;
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char *cur;
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char *expopt, *newopt, *tmpopt;
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if (opts == NULL)
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return strdup("");
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fstab = strdup(fstab);
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/* remove meta options from list */
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remopt(fstab, MOUNT_META_OPTION_FSTAB);
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remopt(fstab, MOUNT_META_OPTION_CURRENT);
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cur = flags2opts(curflags);
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/*
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* Expand all meta-options passed to us first.
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*/
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expopt = NULL;
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for (p = opts; (o = strsep(&p, ",")) != NULL;) {
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if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
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expopt = catopt(expopt, fstab);
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else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
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expopt = catopt(expopt, cur);
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else
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expopt = catopt(expopt, o);
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}
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free(fstab);
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free(cur);
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free(opts);
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/*
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* Remove previous contradictory arguments. Given option "foo" we
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* remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
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* and "foo" - so we can deal with possible options like "notice".
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*/
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newopt = NULL;
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for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
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if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
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errx(1, "malloc failed");
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strcpy(tmpopt, "no");
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strcat(tmpopt, o);
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remopt(newopt, tmpopt);
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free(tmpopt);
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if (strncmp("no", o, 2) == 0)
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remopt(newopt, o+2);
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newopt = catopt(newopt, o);
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}
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free(expopt);
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return newopt;
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}
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void
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remopt(string, opt)
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char *string;
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const char *opt;
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{
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char *o, *p, *r;
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if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
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return;
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r = string;
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for (p = string; (o = strsep(&p, ",")) != NULL;) {
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if (strcmp(opt, o) != 0) {
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if (*r == ',' && *o != '\0')
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r++;
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while ((*r++ = *o++) != '\0')
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;
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*--r = ',';
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}
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}
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*r = '\0';
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}
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void
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usage()
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{
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@ -580,33 +682,12 @@ putfsent(ent)
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const struct statfs *ent;
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{
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struct fstab *fst;
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char *opts;
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opts = flags2opts(ent->f_flags);
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printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname,
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ent->f_fstypename, (ent->f_flags & MNT_RDONLY) ? "ro" : "rw");
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/* XXX should use optnames[] - put shorter names in it. */
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if (ent->f_flags & MNT_SYNCHRONOUS)
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printf(",sync");
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if (ent->f_flags & MNT_NOEXEC)
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printf(",noexec");
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if (ent->f_flags & MNT_NOSUID)
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printf(",nosuid");
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if (ent->f_flags & MNT_NODEV)
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printf(",nodev");
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if (ent->f_flags & MNT_UNION)
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printf(",union");
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if (ent->f_flags & MNT_ASYNC)
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printf(",async");
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if (ent->f_flags & MNT_NOATIME)
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printf(",noatime");
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if (ent->f_flags & MNT_NOCLUSTERR)
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printf(",noclusterr");
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if (ent->f_flags & MNT_NOCLUSTERW)
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printf(",noclusterw");
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if (ent->f_flags & MNT_NOSYMFOLLOW)
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printf (",nosymfollow");
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if (ent->f_flags & MNT_SUIDDIR)
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printf(",suiddir");
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ent->f_fstypename, opts);
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free(opts);
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if ((fst = getfsspec(ent->f_mntfromname)))
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printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
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@ -617,3 +698,29 @@ putfsent(ent)
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else
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printf("\t0 0\n");
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}
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char *
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flags2opts(flags)
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int flags;
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{
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char *res;
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res = NULL;
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res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw");
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if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync");
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if (flags & MNT_NOEXEC) res = catopt(res, "noexec");
|
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if (flags & MNT_NOSUID) res = catopt(res, "nosuid");
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if (flags & MNT_NODEV) res = catopt(res, "nodev");
|
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if (flags & MNT_UNION) res = catopt(res, "union");
|
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if (flags & MNT_ASYNC) res = catopt(res, "async");
|
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if (flags & MNT_NOATIME) res = catopt(res, "noatime");
|
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if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr");
|
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if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw");
|
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if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow");
|
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if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir");
|
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|
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return res;
|
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}
|
||||
|
|
|
|||
|
|
@ -30,7 +30,7 @@
|
|||
.\" SUCH DAMAGE.
|
||||
.\"
|
||||
.\" @(#)mount.8 8.8 (Berkeley) 6/16/94
|
||||
.\" $Id: mount.8,v 1.24 1998/10/16 00:06:56 des Exp $
|
||||
.\" $Id: mount.8,v 1.25 1999/04/08 13:59:42 ghelmer Exp $
|
||||
.\"
|
||||
.Dd June 16, 1994
|
||||
.Dt MOUNT 8
|
||||
|
|
@ -101,6 +101,8 @@ caution).
|
|||
Options are specified with a
|
||||
.Fl o
|
||||
flag followed by a comma separated string of options.
|
||||
In case of conflicting options being specified, the rightmost option
|
||||
takes effect.
|
||||
The following options are available:
|
||||
.Bl -tag -width indent
|
||||
.It async
|
||||
|
|
@ -112,12 +114,23 @@ This is a
|
|||
flag to set,
|
||||
and should not be used unless you are prepared to recreate the file
|
||||
system should your system crash.
|
||||
.It current
|
||||
When used with the
|
||||
.Fl u
|
||||
flag, this is the same as specifying the options currently in effect for
|
||||
the mounted filesystem.
|
||||
.It force
|
||||
The same as
|
||||
.Fl f ;
|
||||
forces the revocation of write access when trying to downgrade
|
||||
a filesystem mount status from read-write to read-only. Also
|
||||
forces the R/W mount of an unclean filesystem (dangerous; use with caution).
|
||||
.It fstab
|
||||
When used with the
|
||||
.Fl u
|
||||
flag, this is the same as specifying all the options listed in the
|
||||
.Xr fstab 5
|
||||
file for the filesystem.
|
||||
.It noatime
|
||||
Do not update the file access time when reading from a file. This option
|
||||
is useful on filesystems where there are large numbers of files and
|
||||
|
|
@ -287,13 +300,9 @@ An attempt to change from read-write to read-only will fail if any
|
|||
files on the filesystem are currently open for writing unless the
|
||||
.Fl f
|
||||
flag is also specified.
|
||||
The set of options is determined by first extracting the options
|
||||
for the file system from the
|
||||
.Xr fstab 5
|
||||
table,
|
||||
then applying any options specified by the
|
||||
.Fl o
|
||||
argument,
|
||||
The set of options is determined by applying the options specified
|
||||
in the argument to
|
||||
.Fl o
|
||||
and finally applying the
|
||||
.Fl r
|
||||
or
|
||||
|
|
|
|||
|
|
@ -42,7 +42,7 @@ static const char copyright[] =
|
|||
static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95";
|
||||
#endif
|
||||
static const char rcsid[] =
|
||||
"$Id: mount.c,v 1.28 1998/07/06 07:12:38 charnier Exp $";
|
||||
"$Id: mount.c,v 1.29 1999/03/16 22:26:51 bde Exp $";
|
||||
#endif /* not lint */
|
||||
|
||||
#include <sys/param.h>
|
||||
|
|
@ -63,6 +63,10 @@ static const char rcsid[] =
|
|||
#include "extern.h"
|
||||
#include "pathnames.h"
|
||||
|
||||
/* `meta' options */
|
||||
#define MOUNT_META_OPTION_FSTAB "fstab"
|
||||
#define MOUNT_META_OPTION_CURRENT "current"
|
||||
|
||||
int debug, fstab_style, verbose;
|
||||
|
||||
char *catopt __P((char *, const char *));
|
||||
|
|
@ -72,11 +76,14 @@ int hasopt __P((const char *, const char *));
|
|||
int ismounted __P((struct fstab *, struct statfs *, int));
|
||||
int isremountable __P((const char *));
|
||||
void mangle __P((char *, int *, const char **));
|
||||
char *update_options __P((char *, char *, int));
|
||||
int mountfs __P((const char *, const char *, const char *,
|
||||
int, const char *, const char *));
|
||||
void remopt __P((char *, const char *));
|
||||
void prmount __P((struct statfs *));
|
||||
void putfsent __P((const struct statfs *));
|
||||
void usage __P((void));
|
||||
char *flags2opts __P((int));
|
||||
|
||||
/* Map from mount options to printable formats. */
|
||||
static struct opt {
|
||||
|
|
@ -99,7 +106,7 @@ static struct opt {
|
|||
{ MNT_NOCLUSTERW, "noclusterw" },
|
||||
{ MNT_SUIDDIR, "suiddir" },
|
||||
{ MNT_SOFTDEP, "soft-updates" },
|
||||
{ NULL }
|
||||
{ 0, NULL }
|
||||
};
|
||||
|
||||
/*
|
||||
|
|
@ -224,10 +231,15 @@ main(argc, argv)
|
|||
errx(1,
|
||||
"unknown special file or file system %s",
|
||||
*argv);
|
||||
if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL)
|
||||
if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) {
|
||||
mntfromname = fs->fs_spec;
|
||||
else
|
||||
options = update_options(options, fs->fs_mntops,
|
||||
mntbuf->f_flags);
|
||||
} else {
|
||||
mntfromname = mntbuf->f_mntfromname;
|
||||
options = update_options(options, NULL,
|
||||
mntbuf->f_flags);
|
||||
}
|
||||
rval = mountfs(mntbuf->f_fstypename, mntfromname,
|
||||
mntbuf->f_mntonname, init_flags, options, 0);
|
||||
break;
|
||||
|
|
@ -524,6 +536,9 @@ catopt(s0, s1)
|
|||
size_t i;
|
||||
char *cp;
|
||||
|
||||
if (s1 == NULL || *s1 == '\0')
|
||||
return s0;
|
||||
|
||||
if (s0 && *s0) {
|
||||
i = strlen(s0) + strlen(s1) + 1 + 1;
|
||||
if ((cp = malloc(i)) == NULL)
|
||||
|
|
@ -548,7 +563,7 @@ mangle(options, argcp, argv)
|
|||
|
||||
argc = *argcp;
|
||||
for (s = options; (p = strsep(&s, ",")) != NULL;)
|
||||
if (*p != '\0')
|
||||
if (*p != '\0') {
|
||||
if (*p == '-') {
|
||||
argv[argc++] = p;
|
||||
p = strchr(p, '=');
|
||||
|
|
@ -560,10 +575,97 @@ mangle(options, argcp, argv)
|
|||
argv[argc++] = "-o";
|
||||
argv[argc++] = p;
|
||||
}
|
||||
}
|
||||
|
||||
*argcp = argc;
|
||||
}
|
||||
|
||||
|
||||
char *
|
||||
update_options(opts, fstab, curflags)
|
||||
char *opts;
|
||||
char *fstab;
|
||||
int curflags;
|
||||
{
|
||||
char *o, *p;
|
||||
char *cur;
|
||||
char *expopt, *newopt, *tmpopt;
|
||||
|
||||
if (opts == NULL)
|
||||
return strdup("");
|
||||
|
||||
fstab = strdup(fstab);
|
||||
|
||||
/* remove meta options from list */
|
||||
remopt(fstab, MOUNT_META_OPTION_FSTAB);
|
||||
remopt(fstab, MOUNT_META_OPTION_CURRENT);
|
||||
cur = flags2opts(curflags);
|
||||
|
||||
/*
|
||||
* Expand all meta-options passed to us first.
|
||||
*/
|
||||
expopt = NULL;
|
||||
for (p = opts; (o = strsep(&p, ",")) != NULL;) {
|
||||
if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0)
|
||||
expopt = catopt(expopt, fstab);
|
||||
else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0)
|
||||
expopt = catopt(expopt, cur);
|
||||
else
|
||||
expopt = catopt(expopt, o);
|
||||
}
|
||||
free(fstab);
|
||||
free(cur);
|
||||
free(opts);
|
||||
|
||||
/*
|
||||
* Remove previous contradictory arguments. Given option "foo" we
|
||||
* remove all the "nofoo" options. Given "nofoo" we remove "nonofoo"
|
||||
* and "foo" - so we can deal with possible options like "notice".
|
||||
*/
|
||||
newopt = NULL;
|
||||
for (p = expopt; (o = strsep(&p, ",")) != NULL;) {
|
||||
if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL)
|
||||
errx(1, "malloc failed");
|
||||
|
||||
strcpy(tmpopt, "no");
|
||||
strcat(tmpopt, o);
|
||||
remopt(newopt, tmpopt);
|
||||
free(tmpopt);
|
||||
|
||||
if (strncmp("no", o, 2) == 0)
|
||||
remopt(newopt, o+2);
|
||||
|
||||
newopt = catopt(newopt, o);
|
||||
}
|
||||
free(expopt);
|
||||
|
||||
return newopt;
|
||||
}
|
||||
|
||||
void
|
||||
remopt(string, opt)
|
||||
char *string;
|
||||
const char *opt;
|
||||
{
|
||||
char *o, *p, *r;
|
||||
|
||||
if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0')
|
||||
return;
|
||||
|
||||
r = string;
|
||||
|
||||
for (p = string; (o = strsep(&p, ",")) != NULL;) {
|
||||
if (strcmp(opt, o) != 0) {
|
||||
if (*r == ',' && *o != '\0')
|
||||
r++;
|
||||
while ((*r++ = *o++) != '\0')
|
||||
;
|
||||
*--r = ',';
|
||||
}
|
||||
}
|
||||
*r = '\0';
|
||||
}
|
||||
|
||||
void
|
||||
usage()
|
||||
{
|
||||
|
|
@ -580,33 +682,12 @@ putfsent(ent)
|
|||
const struct statfs *ent;
|
||||
{
|
||||
struct fstab *fst;
|
||||
|
||||
char *opts;
|
||||
|
||||
opts = flags2opts(ent->f_flags);
|
||||
printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname,
|
||||
ent->f_fstypename, (ent->f_flags & MNT_RDONLY) ? "ro" : "rw");
|
||||
|
||||
/* XXX should use optnames[] - put shorter names in it. */
|
||||
if (ent->f_flags & MNT_SYNCHRONOUS)
|
||||
printf(",sync");
|
||||
if (ent->f_flags & MNT_NOEXEC)
|
||||
printf(",noexec");
|
||||
if (ent->f_flags & MNT_NOSUID)
|
||||
printf(",nosuid");
|
||||
if (ent->f_flags & MNT_NODEV)
|
||||
printf(",nodev");
|
||||
if (ent->f_flags & MNT_UNION)
|
||||
printf(",union");
|
||||
if (ent->f_flags & MNT_ASYNC)
|
||||
printf(",async");
|
||||
if (ent->f_flags & MNT_NOATIME)
|
||||
printf(",noatime");
|
||||
if (ent->f_flags & MNT_NOCLUSTERR)
|
||||
printf(",noclusterr");
|
||||
if (ent->f_flags & MNT_NOCLUSTERW)
|
||||
printf(",noclusterw");
|
||||
if (ent->f_flags & MNT_NOSYMFOLLOW)
|
||||
printf (",nosymfollow");
|
||||
if (ent->f_flags & MNT_SUIDDIR)
|
||||
printf(",suiddir");
|
||||
ent->f_fstypename, opts);
|
||||
free(opts);
|
||||
|
||||
if ((fst = getfsspec(ent->f_mntfromname)))
|
||||
printf("\t%u %u\n", fst->fs_freq, fst->fs_passno);
|
||||
|
|
@ -617,3 +698,29 @@ putfsent(ent)
|
|||
else
|
||||
printf("\t0 0\n");
|
||||
}
|
||||
|
||||
|
||||
char *
|
||||
flags2opts(flags)
|
||||
int flags;
|
||||
{
|
||||
char *res;
|
||||
|
||||
res = NULL;
|
||||
|
||||
res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw");
|
||||
|
||||
if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync");
|
||||
if (flags & MNT_NOEXEC) res = catopt(res, "noexec");
|
||||
if (flags & MNT_NOSUID) res = catopt(res, "nosuid");
|
||||
if (flags & MNT_NODEV) res = catopt(res, "nodev");
|
||||
if (flags & MNT_UNION) res = catopt(res, "union");
|
||||
if (flags & MNT_ASYNC) res = catopt(res, "async");
|
||||
if (flags & MNT_NOATIME) res = catopt(res, "noatime");
|
||||
if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr");
|
||||
if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw");
|
||||
if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow");
|
||||
if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir");
|
||||
|
||||
return res;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue