1 | /* fstab-decode(8). |
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2 | |
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3 | Copyright (c) 2006 Red Hat, Inc. All rights reserved. |
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4 | |
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5 | This copyrighted material is made available to anyone wishing to use, modify, |
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6 | copy, or redistribute it subject to the terms and conditions of the GNU General |
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7 | Public License v.2. |
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8 | |
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9 | This program is distributed in the hope that it will be useful, but WITHOUT ANY |
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10 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A |
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11 | PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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12 | |
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13 | You should have received a copy of the GNU General Public License along with |
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14 | this program; if not, write to the Free Software Foundation, Inc., 51 Franklin |
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15 | Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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16 | |
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17 | Author: Miloslav Trmac <mitr@redhat.com> */ |
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18 | |
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19 | #include <errno.h> |
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20 | #include <stdio.h> |
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21 | #include <stdlib.h> |
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22 | #include <string.h> |
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23 | #include <unistd.h> |
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24 | |
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25 | /* Decode the fstab-encoded string in place. */ |
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26 | static void |
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27 | decode(char *s) |
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28 | { |
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29 | const char *src; |
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30 | char *dest; |
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31 | |
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32 | src = s; |
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33 | dest = s; |
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34 | while (*src != '\0') { |
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35 | if (*src != '\\') |
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36 | *dest = *src++; |
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37 | else { |
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38 | static const struct repl { |
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39 | char orig[4]; |
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40 | size_t len; |
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41 | char new; |
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42 | } repls[] = { |
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43 | #define R(X, Y) { X, sizeof(X) - 1, Y } |
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44 | R("\\", '\\'), |
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45 | R("011", '\t'), |
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46 | R("012", '\n'), |
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47 | R("040", ' '), |
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48 | R("134", '\\') |
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49 | #undef R |
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50 | }; |
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51 | |
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52 | size_t i; |
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53 | |
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54 | for (i = 0; i < sizeof (repls) / sizeof (repls[0]); |
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55 | i++) { |
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56 | if (memcmp(src + 1, repls[i].orig, |
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57 | repls[i].len) == 0) { |
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58 | *dest = repls[i].new; |
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59 | src += 1 + repls[i].len; |
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60 | goto found; |
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61 | } |
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62 | } |
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63 | *dest = *src++; |
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64 | found: |
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65 | ; |
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66 | } |
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67 | dest++; |
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68 | } |
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69 | *dest = '\0'; |
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70 | } |
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71 | |
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72 | int |
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73 | main (int argc, char *argv[]) |
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74 | { |
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75 | size_t i; |
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76 | |
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77 | if (argc < 2) { |
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78 | fprintf(stderr, "Usage: fstab-decode command [arguments]\n"); |
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79 | return EXIT_FAILURE; |
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80 | } |
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81 | for (i = 2; i < (size_t)argc; i++) |
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82 | decode(argv[i]); |
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83 | execvp(argv[1], argv + 1); |
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84 | fprintf(stderr, "fstab-decode: %s: %s\n", argv[1], strerror(errno)); |
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85 | return 127; |
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86 | } |
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