binutils/filemode.c

   1 /* filemode.c -- make a string describing file modes
   2    Copyright 1985, 1990, 1991, 1994, 1995, 1997, 2003
   3    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 2, 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., 59 Temple Place - Suite 330, Boston, MA
  18    02111-1307, USA.  */
  19 \f
  20 #include "bfd.h"
  21 #include "bucomm.h"
  22
  23 static char ftypelet (unsigned long);
  24 static void setst (unsigned long, char *);
  25
  26 /* filemodestring - fill in string STR with an ls-style ASCII
  27    representation of the st_mode field of file stats block STATP.
  28    10 characters are stored in STR; no terminating null is added.
  29    The characters stored in STR are:
  30
  31    0    File type.  'd' for directory, 'c' for character
  32         special, 'b' for block special, 'm' for multiplex,
  33         'l' for symbolic link, 's' for socket, 'p' for fifo,
  34         '-' for any other file type
  35
  36    1    'r' if the owner may read, '-' otherwise.
  37
  38    2    'w' if the owner may write, '-' otherwise.
  39
  40    3    'x' if the owner may execute, 's' if the file is
  41         set-user-id, '-' otherwise.
  42         'S' if the file is set-user-id, but the execute
  43         bit isn't set.
  44
  45    4    'r' if group members may read, '-' otherwise.
  46
  47    5    'w' if group members may write, '-' otherwise.
  48
  49    6    'x' if group members may execute, 's' if the file is
  50         set-group-id, '-' otherwise.
  51         'S' if it is set-group-id but not executable.
  52
  53    7    'r' if any user may read, '-' otherwise.
  54
  55    8    'w' if any user may write, '-' otherwise.
  56
  57    9    'x' if any user may execute, 't' if the file is "sticky"
  58         (will be retained in swap space after execution), '-'
  59         otherwise.
  60         'T' if the file is sticky but not executable.  */
  61
  62 #if 0
  63
  64 /* This is not used; only mode_string is used.  */
  65
  66 void
  67 filemodestring (struct stat *statp, char *str)
  68 {
  69   mode_string ((unsigned long) statp->st_mode, str);
  70 }
  71
  72 #endif
  73
  74 /* Get definitions for the file permission bits.  */
  75
  76 #ifndef S_IRWXU
  77 #define S_IRWXU 0700
  78 #endif
  79 #ifndef S_IRUSR
  80 #define S_IRUSR 0400
  81 #endif
  82 #ifndef S_IWUSR
  83 #define S_IWUSR 0200
  84 #endif
  85 #ifndef S_IXUSR
  86 #define S_IXUSR 0100
  87 #endif
  88
  89 #ifndef S_IRWXG
  90 #define S_IRWXG 0070
  91 #endif
  92 #ifndef S_IRGRP
  93 #define S_IRGRP 0040
  94 #endif
  95 #ifndef S_IWGRP
  96 #define S_IWGRP 0020
  97 #endif
  98 #ifndef S_IXGRP
  99 #define S_IXGRP 0010
 100 #endif
 101
 102 #ifndef S_IRWXO
 103 #define S_IRWXO 0007
 104 #endif
 105 #ifndef S_IROTH
 106 #define S_IROTH 0004
 107 #endif
 108 #ifndef S_IWOTH
 109 #define S_IWOTH 0002
 110 #endif
 111 #ifndef S_IXOTH
 112 #define S_IXOTH 0001
 113 #endif
 114
 115 /* Like filemodestring, but only the relevant part of the `struct stat'
 116    is given as an argument.  */
 117
 118 void
 119 mode_string (unsigned long mode, char *str)
 120 {
 121   str[0] = ftypelet ((unsigned long) mode);
 122   str[1] = (mode & S_IRUSR) != 0 ? 'r' : '-';
 123   str[2] = (mode & S_IWUSR) != 0 ? 'w' : '-';
 124   str[3] = (mode & S_IXUSR) != 0 ? 'x' : '-';
 125   str[4] = (mode & S_IRGRP) != 0 ? 'r' : '-';
 126   str[5] = (mode & S_IWGRP) != 0 ? 'w' : '-';
 127   str[6] = (mode & S_IXGRP) != 0 ? 'x' : '-';
 128   str[7] = (mode & S_IROTH) != 0 ? 'r' : '-';
 129   str[8] = (mode & S_IWOTH) != 0 ? 'w' : '-';
 130   str[9] = (mode & S_IXOTH) != 0 ? 'x' : '-';
 131   setst ((unsigned long) mode, str);
 132 }
 133
 134 /* Return a character indicating the type of file described by
 135    file mode BITS:
 136    'd' for directories
 137    'b' for block special files
 138    'c' for character special files
 139    'm' for multiplexer files
 140    'l' for symbolic links
 141    's' for sockets
 142    'p' for fifos
 143    '-' for any other file type.  */
 144
 145 #ifndef S_ISDIR
 146 #ifdef S_IFDIR
 147 #define S_ISDIR(i) (((i) & S_IFMT) == S_IFDIR)
 148 #else /* ! defined (S_IFDIR) */
 149 #define S_ISDIR(i) (((i) & 0170000) == 040000)
 150 #endif /* ! defined (S_IFDIR) */
 151 #endif /* ! defined (S_ISDIR) */
 152
 153 #ifndef S_ISBLK
 154 #ifdef S_IFBLK
 155 #define S_ISBLK(i) (((i) & S_IFMT) == S_IFBLK)
 156 #else /* ! defined (S_IFBLK) */
 157 #define S_ISBLK(i) 0
 158 #endif /* ! defined (S_IFBLK) */
 159 #endif /* ! defined (S_ISBLK) */
 160
 161 #ifndef S_ISCHR
 162 #ifdef S_IFCHR
 163 #define S_ISCHR(i) (((i) & S_IFMT) == S_IFCHR)
 164 #else /* ! defined (S_IFCHR) */
 165 #define S_ISCHR(i) 0
 166 #endif /* ! defined (S_IFCHR) */
 167 #endif /* ! defined (S_ISCHR) */
 168
 169 #ifndef S_ISFIFO
 170 #ifdef S_IFIFO
 171 #define S_ISFIFO(i) (((i) & S_IFMT) == S_IFIFO)
 172 #else /* ! defined (S_IFIFO) */
 173 #define S_ISFIFO(i) 0
 174 #endif /* ! defined (S_IFIFO) */
 175 #endif /* ! defined (S_ISFIFO) */
 176
 177 #ifndef S_ISSOCK
 178 #ifdef S_IFSOCK
 179 #define S_ISSOCK(i) (((i) & S_IFMT) == S_IFSOCK)
 180 #else /* ! defined (S_IFSOCK) */
 181 #define S_ISSOCK(i) 0
 182 #endif /* ! defined (S_IFSOCK) */
 183 #endif /* ! defined (S_ISSOCK) */
 184
 185 #ifndef S_ISLNK
 186 #ifdef S_IFLNK
 187 #define S_ISLNK(i) (((i) & S_IFMT) == S_IFLNK)
 188 #else /* ! defined (S_IFLNK) */
 189 #define S_ISLNK(i) 0
 190 #endif /* ! defined (S_IFLNK) */
 191 #endif /* ! defined (S_ISLNK) */
 192
 193 static char
 194 ftypelet (unsigned long bits)
 195 {
 196   if (S_ISDIR (bits))
 197     return 'd';
 198   if (S_ISLNK (bits))
 199     return 'l';
 200   if (S_ISBLK (bits))
 201     return 'b';
 202   if (S_ISCHR (bits))
 203     return 'c';
 204   if (S_ISSOCK (bits))
 205     return 's';
 206   if (S_ISFIFO (bits))
 207     return 'p';
 208
 209 #ifdef S_IFMT
 210 #ifdef S_IFMPC
 211   if ((bits & S_IFMT) == S_IFMPC
 212       || (bits & S_IFMT) == S_IFMPB)
 213     return 'm';
 214 #endif
 215 #ifdef S_IFNWK
 216   if ((bits & S_IFMT) == S_IFNWK)
 217     return 'n';
 218 #endif
 219 #endif
 220
 221   return '-';
 222 }
 223
 224 /* Set the 's' and 't' flags in file attributes string CHARS,
 225    according to the file mode BITS.  */
 226
 227 static void
 228 setst (unsigned long bits ATTRIBUTE_UNUSED, char *chars ATTRIBUTE_UNUSED)
 229 {
 230 #ifdef S_ISUID
 231   if (bits & S_ISUID)
 232     {
 233       if (chars[3] != 'x')
 234         /* Set-uid, but not executable by owner.  */
 235         chars[3] = 'S';
 236       else
 237         chars[3] = 's';
 238     }
 239 #endif
 240 #ifdef S_ISGID
 241   if (bits & S_ISGID)
 242     {
 243       if (chars[6] != 'x')
 244         /* Set-gid, but not executable by group.  */
 245         chars[6] = 'S';
 246       else
 247         chars[6] = 's';
 248     }
 249 #endif
 250 #ifdef S_ISVTX
 251   if (bits & S_ISVTX)
 252     {
 253       if (chars[9] != 'x')
 254         /* Sticky, but not executable by others.  */
 255         chars[9] = 'T';
 256       else
 257         chars[9] = 't';
 258     }
 259 #endif
 260 }