1 /* Work around a bug of lstat on some systems 2 3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free 4 Software Foundation, Inc. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software Foundation, 18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 19 20 /* written by Jim Meyering */ 21 22 #ifdef HAVE_CONFIG_H 23 # include <config.h> 24 #endif 25 26 /* The specification of these functions is in sys_stat.h. But we cannot 27 include this include file here, because on some systems, a 28 "#define lstat lstat64" is being used, and sys_stat.h deletes this 29 definition. */ 30 31 #include <sys/types.h> 32 #include <sys/stat.h> 33 #include <stdlib.h> 34 #include <string.h> 35 36 #include "stat-macros.h" 37 #include "xalloc.h" 38 39 /* lstat works differently on Linux and Solaris systems. POSIX (see 40 `pathname resolution' in the glossary) requires that programs like `ls' 41 take into consideration the fact that FILE has a trailing slash when 42 FILE is a symbolic link. On Linux systems, the lstat function already 43 has the desired semantics (in treating `lstat("symlink/",sbuf)' just like 44 `lstat("symlink/.",sbuf)', but on Solaris it does not. 45 46 If FILE has a trailing slash and specifies a symbolic link, 47 then append a `.' to FILE and call lstat a second time. */ 48 49 int 50 rpl_lstat (const char *file, struct stat *sbuf) 51 { 52 size_t len; 53 char *new_file; 54 55 int lstat_result = lstat (file, sbuf); 56 57 if (lstat_result != 0 || !S_ISLNK (sbuf->st_mode)) 58 return lstat_result; 59 60 len = strlen (file); 61 if (len == 0 || file[len - 1] != '/') 62 return lstat_result; 63 64 /* FILE refers to a symbolic link and the name ends with a slash. 65 Append a `.' to FILE and repeat the lstat call. */ 66 67 /* Add one for the `.' we'll append, and one more for the trailing NUL. */ 68 new_file = xmalloc (len + 1 + 1); 69 memcpy (new_file, file, len); 70 new_file[len] = '.'; 71 new_file[len + 1] = 0; 72 73 lstat_result = lstat (new_file, sbuf); 74 free (new_file); 75 76 return lstat_result; 77 } 78