binutils/filemode.c

   1 /* filemode.c -- make a string describing file modes
   2    Copyright 1985, 1990, 1991, 1994, 1995, 1997, 1999, 2002, 2003, 2005,
   3    2007 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  18    02110-1301, USA.  */
  19 \f
  20 #include "sysdep.h"
  21 #include "bfd.h"
  22 #include "bucomm.h"
  23
  24 static char ftypelet (unsigned long);
  25 static void setst (unsigned long, char *);
  26
  27 /* filemodestring - fill in string STR with an ls-style ASCII
  28    representation of the st_mode field of file stats block STATP.
  29    10 characters are stored in STR; no terminating null is added.
  30    The characters stored in STR are:
  31
  32    0    File type.  'd' for directory, 'c' for character
  33         special, 'b' for block special, 'm' for multiplex,
  34         'l' for symbolic link, 's' for socket, 'p' for fifo,
  35         '-' for any other file type
  36
  37    1    'r' if the owner may read, '-' otherwise.
  38
  39    2    'w' if the owner may write, '-' otherwise.
  40
  41    3    'x' if the owner may execute, 's' if the file is
  42         set-user-id, '-' otherwise.
  43         'S' if the file is set-user-id, but the execute
  44         bit isn't set.
  45
  46    4    'r' if group members may read, '-' otherwise.
  47
  48    5    'w' if group members may write, '-' otherwise.
  49
  50    6    'x' if group members may execute, 's' if the file is
  51         set-group-id, '-' otherwise.
  52         'S' if it is set-group-id but not executable.
  53
  54    7    'r' if any user may read, '-' otherwise.
  55
  56    8    'w' if any user may write, '-' otherwise.
  57
  58    9    'x' if any user may execute, 't' if the file is "sticky"
  59         (will be retained in swap space after execution), '-'
  60         otherwise.
  61         'T' if the file is sticky but not executable.  */
  62
  63 /* Get definitions for the file permission bits.  */
  64
  65 #ifndef S_IRWXU
  66 #define S_IRWXU 0700
  67 #endif
  68 #ifndef S_IRUSR
  69 #define S_IRUSR 0400
  70 #endif
  71 #ifndef S_IWUSR
  72 #define S_IWUSR 0200
  73 #endif
  74 #ifndef S_IXUSR
  75 #define S_IXUSR 0100
  76 #endif
  77
  78 #ifndef S_IRWXG
  79 #define S_IRWXG 0070
  80 #endif
  81 #ifndef S_IRGRP
  82 #define S_IRGRP 0040
  83 #endif
  84 #ifndef S_IWGRP
  85 #define S_IWGRP 0020
  86 #endif
  87 #ifndef S_IXGRP
  88 #define S_IXGRP 0010
  89 #endif
  90
  91 #ifndef S_IRWXO
  92 #define S_IRWXO 0007
  93 #endif
  94 #ifndef S_IROTH
  95 #define S_IROTH 0004
  96 #endif
  97 #ifndef S_IWOTH
  98 #define S_IWOTH 0002
  99 #endif
 100 #ifndef S_IXOTH
 101 #define S_IXOTH 0001
 102 #endif
 103
 104 /* Like filemodestring, but only the relevant part of the `struct stat'
 105    is given as an argument.  */
 106
 107 void
 108 mode_string (unsigned long mode, char *str)
 109 {
 110   str[0] = ftypelet ((unsigned long) mode);
 111   str[1] = (mode & S_IRUSR) != 0 ? 'r' : '-';
 112   str[2] = (mode & S_IWUSR) != 0 ? 'w' : '-';
 113   str[3] = (mode & S_IXUSR) != 0 ? 'x' : '-';
 114   str[4] = (mode & S_IRGRP) != 0 ? 'r' : '-';
 115   str[5] = (mode & S_IWGRP) != 0 ? 'w' : '-';
 116   str[6] = (mode & S_IXGRP) != 0 ? 'x' : '-';
 117   str[7] = (mode & S_IROTH) != 0 ? 'r' : '-';
 118   str[8] = (mode & S_IWOTH) != 0 ? 'w' : '-';
 119   str[9] = (mode & S_IXOTH) != 0 ? 'x' : '-';
 120   setst ((unsigned long) mode, str);
 121 }
 122
 123 /* Return a character indicating the type of file described by
 124    file mode BITS:
 125    'd' for directories
 126    'b' for block special files
 127    'c' for character special files
 128    'm' for multiplexer files
 129    'l' for symbolic links
 130    's' for sockets
 131    'p' for fifos
 132    '-' for any other file type.  */
 133
 134 #ifndef S_ISDIR
 135 #ifdef S_IFDIR
 136 #define S_ISDIR(i) (((i) & S_IFMT) == S_IFDIR)
 137 #else /* ! defined (S_IFDIR) */
 138 #define S_ISDIR(i) (((i) & 0170000) == 040000)
 139 #endif /* ! defined (S_IFDIR) */
 140 #endif /* ! defined (S_ISDIR) */
 141
 142 #ifndef S_ISBLK
 143 #ifdef S_IFBLK
 144 #define S_ISBLK(i) (((i) & S_IFMT) == S_IFBLK)
 145 #else /* ! defined (S_IFBLK) */
 146 #define S_ISBLK(i) 0
 147 #endif /* ! defined (S_IFBLK) */
 148 #endif /* ! defined (S_ISBLK) */
 149
 150 #ifndef S_ISCHR
 151 #ifdef S_IFCHR
 152 #define S_ISCHR(i) (((i) & S_IFMT) == S_IFCHR)
 153 #else /* ! defined (S_IFCHR) */
 154 #define S_ISCHR(i) 0
 155 #endif /* ! defined (S_IFCHR) */
 156 #endif /* ! defined (S_ISCHR) */
 157
 158 #ifndef S_ISFIFO
 159 #ifdef S_IFIFO
 160 #define S_ISFIFO(i) (((i) & S_IFMT) == S_IFIFO)
 161 #else /* ! defined (S_IFIFO) */
 162 #define S_ISFIFO(i) 0
 163 #endif /* ! defined (S_IFIFO) */
 164 #endif /* ! defined (S_ISFIFO) */
 165
 166 #ifndef S_ISSOCK
 167 #ifdef S_IFSOCK
 168 #define S_ISSOCK(i) (((i) & S_IFMT) == S_IFSOCK)
 169 #else /* ! defined (S_IFSOCK) */
 170 #define S_ISSOCK(i) 0
 171 #endif /* ! defined (S_IFSOCK) */
 172 #endif /* ! defined (S_ISSOCK) */
 173
 174 #ifndef S_ISLNK
 175 #ifdef S_IFLNK
 176 #define S_ISLNK(i) (((i) & S_IFMT) == S_IFLNK)
 177 #else /* ! defined (S_IFLNK) */
 178 #define S_ISLNK(i) 0
 179 #endif /* ! defined (S_IFLNK) */
 180 #endif /* ! defined (S_ISLNK) */
 181
 182 static char
 183 ftypelet (unsigned long bits)
 184 {
 185   if (S_ISDIR (bits))
 186     return 'd';
 187   if (S_ISLNK (bits))
 188     return 'l';
 189   if (S_ISBLK (bits))
 190     return 'b';
 191   if (S_ISCHR (bits))
 192     return 'c';
 193   if (S_ISSOCK (bits))
 194     return 's';
 195   if (S_ISFIFO (bits))
 196     return 'p';
 197
 198 #ifdef S_IFMT
 199 #ifdef S_IFMPC
 200   if ((bits & S_IFMT) == S_IFMPC
 201       || (bits & S_IFMT) == S_IFMPB)
 202     return 'm';
 203 #endif
 204 #ifdef S_IFNWK
 205   if ((bits & S_IFMT) == S_IFNWK)
 206     return 'n';
 207 #endif
 208 #endif
 209
 210   return '-';
 211 }
 212
 213 /* Set the 's' and 't' flags in file attributes string CHARS,
 214    according to the file mode BITS.  */
 215
 216 static void
 217 setst (unsigned long bits ATTRIBUTE_UNUSED, char *chars ATTRIBUTE_UNUSED)
 218 {
 219 #ifdef S_ISUID
 220   if (bits & S_ISUID)
 221     {
 222       if (chars[3] != 'x')
 223         /* Set-uid, but not executable by owner.  */
 224         chars[3] = 'S';
 225       else
 226         chars[3] = 's';
 227     }
 228 #endif
 229 #ifdef S_ISGID
 230   if (bits & S_ISGID)
 231     {
 232       if (chars[6] != 'x')
 233         /* Set-gid, but not executable by group.  */
 234         chars[6] = 'S';
 235       else
 236         chars[6] = 's';
 237     }
 238 #endif
 239 #ifdef S_ISVTX
 240   if (bits & S_ISVTX)
 241     {
 242       if (chars[9] != 'x')
 243         /* Sticky, but not executable by others.  */
 244         chars[9] = 'T';
 245       else
 246         chars[9] = 't';
 247     }
 248 #endif
 249 }