binutils/filemode.c

   1 /* filemode.c -- make a string describing file modes
   2    Copyright 1985, 1990, 1991, 1994, 1995, 1997
   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 PARAMS ((unsigned long));
  24 static void setst PARAMS ((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 (statp, str)
  68      struct stat *statp;
  69      char *str;
  70 {
  71   mode_string ((unsigned long) statp->st_mode, str);
  72 }
  73
  74 #endif
  75
  76 /* Get definitions for the file permission bits.  */
  77
  78 #ifndef S_IRWXU
  79 #define S_IRWXU 0700
  80 #endif
  81 #ifndef S_IRUSR
  82 #define S_IRUSR 0400
  83 #endif
  84 #ifndef S_IWUSR
  85 #define S_IWUSR 0200
  86 #endif
  87 #ifndef S_IXUSR
  88 #define S_IXUSR 0100
  89 #endif
  90
  91 #ifndef S_IRWXG
  92 #define S_IRWXG 0070
  93 #endif
  94 #ifndef S_IRGRP
  95 #define S_IRGRP 0040
  96 #endif
  97 #ifndef S_IWGRP
  98 #define S_IWGRP 0020
  99 #endif
 100 #ifndef S_IXGRP
 101 #define S_IXGRP 0010
 102 #endif
 103
 104 #ifndef S_IRWXO
 105 #define S_IRWXO 0007
 106 #endif
 107 #ifndef S_IROTH
 108 #define S_IROTH 0004
 109 #endif
 110 #ifndef S_IWOTH
 111 #define S_IWOTH 0002
 112 #endif
 113 #ifndef S_IXOTH
 114 #define S_IXOTH 0001
 115 #endif
 116
 117 /* Like filemodestring, but only the relevant part of the `struct stat'
 118    is given as an argument. */
 119
 120 void
 121 mode_string (mode, str)
 122      unsigned long mode;
 123      char *str;
 124 {
 125   str[0] = ftypelet ((unsigned long) mode);
 126   str[1] = (mode & S_IRUSR) != 0 ? 'r' : '-';
 127   str[2] = (mode & S_IWUSR) != 0 ? 'w' : '-';
 128   str[3] = (mode & S_IXUSR) != 0 ? 'x' : '-';
 129   str[4] = (mode & S_IRGRP) != 0 ? 'r' : '-';
 130   str[5] = (mode & S_IWGRP) != 0 ? 'w' : '-';
 131   str[6] = (mode & S_IXGRP) != 0 ? 'x' : '-';
 132   str[7] = (mode & S_IROTH) != 0 ? 'r' : '-';
 133   str[8] = (mode & S_IWOTH) != 0 ? 'w' : '-';
 134   str[9] = (mode & S_IXOTH) != 0 ? 'x' : '-';
 135   setst ((unsigned long) mode, str);
 136 }
 137
 138 /* Return a character indicating the type of file described by
 139    file mode BITS:
 140    'd' for directories
 141    'b' for block special files
 142    'c' for character special files
 143    'm' for multiplexor files
 144    'l' for symbolic links
 145    's' for sockets
 146    'p' for fifos
 147    '-' for any other file type. */
 148
 149 #ifndef S_ISDIR
 150 #ifdef S_IFDIR
 151 #define S_ISDIR(i) (((i) & S_IFMT) == S_IFDIR)
 152 #else /* ! defined (S_IFDIR) */
 153 #define S_ISDIR(i) (((i) & 0170000) == 040000)
 154 #endif /* ! defined (S_IFDIR) */
 155 #endif /* ! defined (S_ISDIR) */
 156
 157 #ifndef S_ISBLK
 158 #ifdef S_IFBLK
 159 #define S_ISBLK(i) (((i) & S_IFMT) == S_IFBLK)
 160 #else /* ! defined (S_IFBLK) */
 161 #define S_ISBLK(i) 0
 162 #endif /* ! defined (S_IFBLK) */
 163 #endif /* ! defined (S_ISBLK) */
 164
 165 #ifndef S_ISCHR
 166 #ifdef S_IFCHR
 167 #define S_ISCHR(i) (((i) & S_IFMT) == S_IFCHR)
 168 #else /* ! defined (S_IFCHR) */
 169 #define S_ISCHR(i) 0
 170 #endif /* ! defined (S_IFCHR) */
 171 #endif /* ! defined (S_ISCHR) */
 172
 173 #ifndef S_ISFIFO
 174 #ifdef S_IFIFO
 175 #define S_ISFIFO(i) (((i) & S_IFMT) == S_IFIFO)
 176 #else /* ! defined (S_IFIFO) */
 177 #define S_ISFIFO(i) 0
 178 #endif /* ! defined (S_IFIFO) */
 179 #endif /* ! defined (S_ISFIFO) */
 180
 181 #ifndef S_ISSOCK
 182 #ifdef S_IFSOCK
 183 #define S_ISSOCK(i) (((i) & S_IFMT) == S_IFSOCK)
 184 #else /* ! defined (S_IFSOCK) */
 185 #define S_ISSOCK(i) 0
 186 #endif /* ! defined (S_IFSOCK) */
 187 #endif /* ! defined (S_ISSOCK) */
 188
 189 #ifndef S_ISLNK
 190 #ifdef S_IFLNK
 191 #define S_ISLNK(i) (((i) & S_IFMT) == S_IFLNK)
 192 #else /* ! defined (S_IFLNK) */
 193 #define S_ISLNK(i) 0
 194 #endif /* ! defined (S_IFLNK) */
 195 #endif /* ! defined (S_ISLNK) */
 196
 197 static char
 198 ftypelet (bits)
 199      unsigned long bits;
 200 {
 201   if (S_ISDIR (bits))
 202     return 'd';
 203   if (S_ISLNK (bits))
 204     return 'l';
 205   if (S_ISBLK (bits))
 206     return 'b';
 207   if (S_ISCHR (bits))
 208     return 'c';
 209   if (S_ISSOCK (bits))
 210     return 's';
 211   if (S_ISFIFO (bits))
 212     return 'p';
 213
 214 #ifdef S_IFMT
 215 #ifdef S_IFMPC
 216   if ((bits & S_IFMT) == S_IFMPC
 217       || (bits & S_IFMT) == S_IFMPB)
 218     return 'm';
 219 #endif
 220 #ifdef S_IFNWK
 221   if ((bits & S_IFMT) == S_IFNWK)
 222     return 'n';
 223 #endif
 224 #endif
 225
 226   return '-';
 227 }
 228
 229 /* Set the 's' and 't' flags in file attributes string CHARS,
 230    according to the file mode BITS. */
 231
 232 static void
 233 setst (bits, chars)
 234      unsigned long bits ATTRIBUTE_UNUSED;
 235      char *chars ATTRIBUTE_UNUSED;
 236 {
 237 #ifdef S_ISUID
 238   if (bits & S_ISUID)
 239     {
 240       if (chars[3] != 'x')
 241         /* Set-uid, but not executable by owner. */
 242         chars[3] = 'S';
 243       else
 244         chars[3] = 's';
 245     }
 246 #endif
 247 #ifdef S_ISGID
 248   if (bits & S_ISGID)
 249     {
 250       if (chars[6] != 'x')
 251         /* Set-gid, but not executable by group. */
 252         chars[6] = 'S';
 253       else
 254         chars[6] = 's';
 255     }
 256 #endif
 257 #ifdef S_ISVTX
 258   if (bits & S_ISVTX)
 259     {
 260       if (chars[9] != 'x')
 261         /* Sticky, but not executable by others. */
 262         chars[9] = 'T';
 263       else
 264         chars[9] = 't';
 265     }
 266 #endif
 267 }