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47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
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#include "internal.h"
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#include <stdio.h>
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#include <mntent.h>
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#include <sys/stat.h>
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/*
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* Given a block device, find the mount table entry if that block device
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* is mounted.
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*
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* Given any other file (or directory), find the mount table entry for its
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* filesystem.
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*/
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extern struct mntent *
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findMountPoint(const char * name, const char * table)
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{
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struct stat s;
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dev_t mountDevice;
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FILE * mountTable;
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struct mntent * mountEntry;
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if ( stat(name, &s) != 0 )
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return 0;
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if ( (s.st_mode & S_IFMT) == S_IFBLK )
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mountDevice = s.st_rdev;
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else
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mountDevice = s.st_dev;
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if ( (mountTable = setmntent(table, "r")) == 0 )
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return 0;
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while ( (mountEntry = getmntent(mountTable)) != 0 ) {
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if ( strcmp(name, mountEntry->mnt_dir) == 0
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|| strcmp(name, mountEntry->mnt_fsname) == 0 ) /* String match. */
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break;
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if ( stat(mountEntry->mnt_fsname, &s) == 0
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&& s.st_rdev == mountDevice ) /* Match the device. */
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break;
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if ( stat(mountEntry->mnt_dir, &s) == 0
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&& s.st_dev == mountDevice ) /* Match the directory's mount point. */
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break;
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}
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endmntent(mountTable);
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return mountEntry;
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}
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