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annotate lib/lstat.c @ 6163:bba2240c9260

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* iconvme.h: Add prototype for iconv_alloc.
author Simon Josefsson <simon@josefsson.org>
date Tue, 30 Aug 2005 07:38:53 +0000
parents 35504bd557fa
children 96c32553b4c6
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1 /* Work around a bug of lstat on some systems
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2
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free
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4 Software Foundation, Inc.
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b8665a9e1ed0 New file. Simply #define LSTAT and include stat.c.
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5
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6 This program is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2, or (at your option)
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9 any later version.
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10
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
b8665a9e1ed0 New file. Simply #define LSTAT and include stat.c.
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16 You should have received a copy of the GNU General Public License
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17 along with this program; if not, write to the Free Software Foundation,
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a48fb0e98c8c *** empty log message ***
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18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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19
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20 /* written by Jim Meyering */
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21
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22 #include <config.h>
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23
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24 /* The specification of these functions is in sys_stat.h. But we cannot
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25 include this include file here, because on some systems, a
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26 "#define lstat lstat64" is being used, and sys_stat.h deletes this
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27 definition. */
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28
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29 #include <sys/types.h>
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30 #include <sys/stat.h>
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31 #include <stdlib.h>
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32 #include <string.h>
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33
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34 #include "stat-macros.h"
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35 #include "xalloc.h"
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36
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37 /* lstat works differently on Linux and Solaris systems. POSIX (see
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38 `pathname resolution' in the glossary) requires that programs like `ls'
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39 take into consideration the fact that FILE has a trailing slash when
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40 FILE is a symbolic link. On Linux systems, the lstat function already
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41 has the desired semantics (in treating `lstat("symlink/",sbuf)' just like
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42 `lstat("symlink/.",sbuf)', but on Solaris it does not.
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43
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44 If FILE has a trailing slash and specifies a symbolic link,
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45 then append a `.' to FILE and call lstat a second time. */
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46
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47 int
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48 rpl_lstat (const char *file, struct stat *sbuf)
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49 {
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50 size_t len;
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51 char *new_file;
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52
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53 int lstat_result = lstat (file, sbuf);
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54
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55 if (lstat_result != 0 || !S_ISLNK (sbuf->st_mode))
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56 return lstat_result;
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57
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58 len = strlen (file);
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59 if (len == 0 || file[len - 1] != '/')
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60 return lstat_result;
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61
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62 /* FILE refers to a symbolic link and the name ends with a slash.
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63 Append a `.' to FILE and repeat the lstat call. */
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64
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65 /* Add one for the `.' we'll append, and one more for the trailing NUL. */
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66 new_file = xmalloc (len + 1 + 1);
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67 memcpy (new_file, file, len);
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68 new_file[len] = '.';
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69 new_file[len + 1] = 0;
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70
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71 lstat_result = lstat (new_file, sbuf);
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72 free (new_file);
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73
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74 return lstat_result;
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75 }