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1 /* readlink -- obtain contents of symlink. |
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2 Copyright (C) 1998 Olaf Weber. |
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3 |
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4 This program is free software; you can redistribute it and/or modify |
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5 it under the terms of the GNU General Public License as published by |
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6 the Free Software Foundation; either version 2, or (at your option) |
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7 any later version. |
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8 |
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9 This program is distributed in the hope that it will be useful, |
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 GNU General Public License for more details. |
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13 |
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14 You should have received a copy of the GNU General Public License |
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15 along with this program; if not, write to the Free Software Foundation, |
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16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
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17 |
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18 #include <stdio.h> |
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19 #include <kpathsea/config.h> |
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20 #include <kpathsea/c-pathmx.h> |
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21 #include <kpathsea/c-unistd.h> |
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22 #include <kpathsea/c-stat.h> |
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23 |
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24 #ifdef WIN32 |
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25 #include <string.h> |
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26 #endif |
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27 |
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28 /* |
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29 * readlink name |
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30 * Returns 0 if name exists and is a symlink, 1 otherwise. The contents |
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31 * of the link are printed on standard output. |
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32 */ |
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33 |
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34 int main (argc, argv) |
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35 int argc; |
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36 char *argv[]; |
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37 { |
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38 #ifdef S_ISLNK |
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39 int status; |
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40 char path[PATH_MAX]; |
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41 #endif |
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42 |
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43 if (argc > 1 && strcmp (argv[1], "--help") == 0) { |
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44 printf("Usage: %s FILE\n\ |
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45 If FILE exists and is a symlink, print the contents of the link and\n\ |
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46 exit successfully. Otherwise print nothing and fail.\n\ |
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47 \n\ |
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48 --help display this help and exit\n\ |
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49 --version output version information and exit\n\n", argv[0]); |
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50 fputs ("Email bug reports to tex-k@mail.tug.org.\n", stdout); |
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51 exit(0); |
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52 } else if (argc > 1 && strcmp (argv[1], "--version") == 0) { |
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53 printf ("%s (%s)\n\ |
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54 Copyright (C) 1998 Olaf Weber.\n\ |
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55 There is NO warranty. You may redistribute this software\n\ |
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56 under the terms of the GNU General Public License\n\ |
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57 For more information about these matters, see the file named COPYING.\n\ |
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58 Primary author of %s: Olaf Weber.\n", |
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59 argv[0], KPSEVERSION, argv[0]); |
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60 exit (0); |
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61 } |
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62 |
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63 /* insist on exactly one arg */ |
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64 if (argc != 2) { |
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65 fprintf(stderr, "%s: Need exactly one argument.\n\ |
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66 Try `access --help' for more information.\n", argv[0]); |
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67 exit(1); |
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68 } |
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69 |
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70 #ifdef S_ISLNK |
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71 status = readlink(argv[1], path, PATH_MAX); |
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72 if (status != -1) { |
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73 printf("%.*s\n", status, path); |
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74 return 0; |
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75 } |
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76 #endif |
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77 return 1; |
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78 } |
