| 1 | /* filemode.c -- make a string describing file modes |
| 2 | Copyright (C) 1985, 1990 Free Software Foundation, Inc. |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 2 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software |
| 16 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 17 | |
| 18 | #include "sysdep.h" |
| 19 | #include <sys/types.h> |
| 20 | #include <sys/stat.h> |
| 21 | |
| 22 | void mode_string (); |
| 23 | static char ftypelet (); |
| 24 | static void rwx (); |
| 25 | static void setst (); |
| 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 | void |
| 64 | filemodestring (statp, str) |
| 65 | struct stat *statp; |
| 66 | char *str; |
| 67 | { |
| 68 | mode_string (statp->st_mode, str); |
| 69 | } |
| 70 | |
| 71 | /* Like filemodestring, but only the relevant part of the `struct stat' |
| 72 | is given as an argument. */ |
| 73 | |
| 74 | void |
| 75 | mode_string (mode, str) |
| 76 | unsigned short mode; |
| 77 | char *str; |
| 78 | { |
| 79 | str[0] = ftypelet (mode); |
| 80 | rwx ((mode & 0700) << 0, &str[1]); |
| 81 | rwx ((mode & 0070) << 3, &str[4]); |
| 82 | rwx ((mode & 0007) << 6, &str[7]); |
| 83 | setst (mode, str); |
| 84 | } |
| 85 | |
| 86 | /* Return a character indicating the type of file described by |
| 87 | file mode BITS: |
| 88 | 'd' for directories |
| 89 | 'b' for block special files |
| 90 | 'c' for character special files |
| 91 | 'm' for multiplexor files |
| 92 | 'l' for symbolic links |
| 93 | 's' for sockets |
| 94 | 'p' for fifos |
| 95 | '-' for any other file type. */ |
| 96 | |
| 97 | static char |
| 98 | ftypelet (bits) |
| 99 | unsigned short bits; |
| 100 | { |
| 101 | switch (bits & S_IFMT) |
| 102 | { |
| 103 | default: |
| 104 | return '-'; |
| 105 | case S_IFDIR: |
| 106 | return 'd'; |
| 107 | #ifdef S_IFLNK |
| 108 | case S_IFLNK: |
| 109 | return 'l'; |
| 110 | #endif |
| 111 | #ifdef S_IFCHR |
| 112 | case S_IFCHR: |
| 113 | return 'c'; |
| 114 | #endif |
| 115 | #ifdef S_IFBLK |
| 116 | case S_IFBLK: |
| 117 | return 'b'; |
| 118 | #endif |
| 119 | #ifdef S_IFMPC |
| 120 | case S_IFMPC: |
| 121 | case S_IFMPB: |
| 122 | return 'm'; |
| 123 | #endif |
| 124 | #ifdef S_IFSOCK |
| 125 | case S_IFSOCK: |
| 126 | return 's'; |
| 127 | #endif |
| 128 | #ifdef S_IFIFO |
| 129 | #if S_IFIFO != S_IFSOCK |
| 130 | case S_IFIFO: |
| 131 | return 'p'; |
| 132 | #endif |
| 133 | #endif |
| 134 | #ifdef S_IFNWK /* HP-UX */ |
| 135 | case S_IFNWK: |
| 136 | return 'n'; |
| 137 | #endif |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | /* Look at read, write, and execute bits in BITS and set |
| 142 | flags in CHARS accordingly. */ |
| 143 | |
| 144 | static void |
| 145 | rwx (bits, chars) |
| 146 | unsigned short bits; |
| 147 | char *chars; |
| 148 | { |
| 149 | chars[0] = (bits & S_IREAD) ? 'r' : '-'; |
| 150 | chars[1] = (bits & S_IWRITE) ? 'w' : '-'; |
| 151 | chars[2] = (bits & S_IEXEC) ? 'x' : '-'; |
| 152 | } |
| 153 | |
| 154 | /* Set the 's' and 't' flags in file attributes string CHARS, |
| 155 | according to the file mode BITS. */ |
| 156 | |
| 157 | static void |
| 158 | setst (bits, chars) |
| 159 | unsigned short bits; |
| 160 | char *chars; |
| 161 | { |
| 162 | #ifdef S_ISUID |
| 163 | if (bits & S_ISUID) |
| 164 | { |
| 165 | if (chars[3] != 'x') |
| 166 | /* Set-uid, but not executable by owner. */ |
| 167 | chars[3] = 'S'; |
| 168 | else |
| 169 | chars[3] = 's'; |
| 170 | } |
| 171 | #endif |
| 172 | #ifdef S_ISGID |
| 173 | if (bits & S_ISGID) |
| 174 | { |
| 175 | if (chars[6] != 'x') |
| 176 | /* Set-gid, but not executable by group. */ |
| 177 | chars[6] = 'S'; |
| 178 | else |
| 179 | chars[6] = 's'; |
| 180 | } |
| 181 | #endif |
| 182 | #ifdef S_ISVTX |
| 183 | if (bits & S_ISVTX) |
| 184 | { |
| 185 | if (chars[9] != 'x') |
| 186 | /* Sticky, but not executable by others. */ |
| 187 | chars[9] = 'T'; |
| 188 | else |
| 189 | chars[9] = 't'; |
| 190 | } |
| 191 | #endif |
| 192 | } |
| 193 | |
| 194 | |