| Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * Utility routines. |
| 4 | * |
| 5 | * Copyright (C) tons of folks. Tracking down who wrote what |
| 6 | * isn't something I'm going to worry about... If you wrote something |
| 7 | * here, please feel free to acknowledge your work. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | * |
| 23 | * Based in part on code from sash, Copyright (c) 1999 by David I. Bell |
| 24 | * Permission has been granted to redistribute this code under the GPL. |
| 25 | * |
| 26 | */ |
| 27 | |
| 28 | #include <stdio.h> |
| 29 | #include "libbb.h" |
| 30 | |
| 31 | |
| 32 | #include <mntent.h> |
| 33 | /* |
| 34 | * Given a block device, find the mount table entry if that block device |
| 35 | * is mounted. |
| 36 | * |
| 37 | * Given any other file (or directory), find the mount table entry for its |
| 38 | * filesystem. |
| 39 | */ |
| 40 | extern struct mntent *find_mount_point(const char *name, const char *table) |
| 41 | { |
| 42 | struct stat s; |
| 43 | dev_t mountDevice; |
| 44 | FILE *mountTable; |
| 45 | struct mntent *mountEntry; |
| 46 | |
| 47 | if (stat(name, &s) != 0) |
| 48 | return 0; |
| 49 | |
| 50 | if ((s.st_mode & S_IFMT) == S_IFBLK) |
| 51 | mountDevice = s.st_rdev; |
| 52 | else |
| 53 | mountDevice = s.st_dev; |
| 54 | |
| 55 | |
| 56 | if ((mountTable = setmntent(table, "r")) == 0) |
| 57 | return 0; |
| 58 | |
| 59 | while ((mountEntry = getmntent(mountTable)) != 0) { |
| 60 | if (strcmp(name, mountEntry->mnt_dir) == 0 |
| 61 | || strcmp(name, mountEntry->mnt_fsname) == 0) /* String match. */ |
| 62 | break; |
| 63 | if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */ |
| 64 | break; |
| 65 | if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */ |
| 66 | break; |
| 67 | } |
| 68 | endmntent(mountTable); |
| 69 | return mountEntry; |
| 70 | } |
| 71 | |
| 72 | |
| 73 | /* END CODE */ |
| 74 | /* |
| 75 | Local Variables: |
| 76 | c-file-style: "linux" |
| 77 | c-basic-offset: 4 |
| 78 | tab-width: 4 |
| 79 | End: |
| 80 | */ |