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Resolve the mount point's path with realpath(2) before checking if file
system is mounted. This prevevents duplicated mounts. The change I made against the original patch is to fall back to the given path on realpath(2) failure instead of exiting with an error. Submitted by: Andreas Kohn <andreas@syndrom23.de> PR: bin/89782 MFC after: 3 days
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=154512
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@ -391,14 +391,21 @@ main(int argc, char *argv[])
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int
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ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize)
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{
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char realfsfile[PATH_MAX];
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int i;
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if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0')
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/* the root file system can always be remounted */
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return (0);
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/* The user may have specified a symlink in fstab, resolve the path */
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if (realpath(fs->fs_file, realfsfile) == NULL) {
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/* Cannot resolve the path, use original one */
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strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile));
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}
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for (i = mntsize - 1; i >= 0; --i)
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if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 &&
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if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 &&
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(!isremountable(fs->fs_vfstype) ||
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strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))
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return (1);
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