1 | /* vi: set sw=4 ts=4: */ |
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2 | /* |
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3 | * Utility routines. |
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4 | * |
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5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
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6 | * |
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7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
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8 | */ |
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9 | |
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10 | #include <mntent.h> |
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11 | #include "libbb.h" |
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12 | |
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13 | #if ENABLE_FEATURE_MTAB_SUPPORT |
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14 | void erase_mtab(const char *name) |
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15 | { |
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16 | struct mntent *entries = NULL; |
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17 | int i, count = 0; |
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18 | FILE *mountTable; |
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19 | struct mntent *m; |
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20 | |
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21 | mountTable = setmntent(bb_path_mtab_file, "r"); |
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22 | /* Bummer. Fall back on trying the /proc filesystem */ |
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23 | if (!mountTable) mountTable = setmntent("/proc/mounts", "r"); |
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24 | if (!mountTable) { |
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25 | bb_perror_msg(bb_path_mtab_file); |
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26 | return; |
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27 | } |
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28 | |
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29 | while ((m = getmntent(mountTable)) != 0) { |
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30 | i = count++; |
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31 | entries = xrealloc(entries, count * sizeof(entries[0])); |
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32 | entries[i].mnt_fsname = xstrdup(m->mnt_fsname); |
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33 | entries[i].mnt_dir = xstrdup(m->mnt_dir); |
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34 | entries[i].mnt_type = xstrdup(m->mnt_type); |
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35 | entries[i].mnt_opts = xstrdup(m->mnt_opts); |
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36 | entries[i].mnt_freq = m->mnt_freq; |
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37 | entries[i].mnt_passno = m->mnt_passno; |
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38 | } |
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39 | endmntent(mountTable); |
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40 | |
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41 | mountTable = setmntent(bb_path_mtab_file, "w"); |
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42 | if (mountTable) { |
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43 | for (i = 0; i < count; i++) { |
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44 | if (strcmp(entries[i].mnt_fsname, name) != 0 |
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45 | && strcmp(entries[i].mnt_dir, name) != 0) |
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46 | addmntent(mountTable, &entries[i]); |
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47 | } |
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48 | endmntent(mountTable); |
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49 | } else if (errno != EROFS) |
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50 | bb_perror_msg(bb_path_mtab_file); |
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51 | } |
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52 | #endif |
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