| 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 1, or (at your option) |
| 7 | 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 17 | \f |
| 18 | #include <sys/types.h> |
| 19 | #include <sys/stat.h> |
| 20 | |
| 21 | void mode_string (); |
| 22 | static char ftypelet (); |
| 23 | static void rwx (); |
| 24 | static void setst (); |
| 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 | void |
| 63 | filemodestring (statp, str) |
| 64 | struct stat *statp; |
| 65 | char *str; |
| 66 | { |
| 67 | mode_string (statp->st_mode, str); |
| 68 | } |
| 69 | |
| 70 | /* Like filemodestring, but only the relevant part of the `struct stat' |
| 71 | is given as an argument. */ |
| 72 | |
| 73 | void |
| 74 | mode_string (mode, str) |
| 75 | unsigned short mode; |
| 76 | char *str; |
| 77 | { |
| 78 | str[0] = ftypelet (mode); |
| 79 | rwx ((mode & 0700) << 0, &str[1]); |
| 80 | rwx ((mode & 0070) << 3, &str[4]); |
| 81 | rwx ((mode & 0007) << 6, &str[7]); |
| 82 | setst (mode, str); |
| 83 | } |
| 84 | |
| 85 | /* Return a character indicating the type of file described by |
| 86 | file mode BITS: |
| 87 | 'd' for directories |
| 88 | 'b' for block special files |
| 89 | 'c' for character special files |
| 90 | 'm' for multiplexor files |
| 91 | 'l' for symbolic links |
| 92 | 's' for sockets |
| 93 | 'p' for fifos |
| 94 | '-' for any other file type. */ |
| 95 | |
| 96 | static char |
| 97 | ftypelet (bits) |
| 98 | unsigned short bits; |
| 99 | { |
| 100 | switch (bits & S_IFMT) |
| 101 | { |
| 102 | default: |
| 103 | return '-'; |
| 104 | case S_IFDIR: |
| 105 | return 'd'; |
| 106 | #ifdef S_IFLNK |
| 107 | case S_IFLNK: |
| 108 | return 'l'; |
| 109 | #endif |
| 110 | #ifdef S_IFCHR |
| 111 | case S_IFCHR: |
| 112 | return 'c'; |
| 113 | #endif |
| 114 | #ifdef S_IFBLK |
| 115 | case S_IFBLK: |
| 116 | return 'b'; |
| 117 | #endif |
| 118 | #ifdef S_IFMPC |
| 119 | case S_IFMPC: |
| 120 | case S_IFMPB: |
| 121 | return 'm'; |
| 122 | #endif |
| 123 | #ifdef S_IFSOCK |
| 124 | case S_IFSOCK: |
| 125 | return 's'; |
| 126 | #endif |
| 127 | #ifdef S_IFIFO |
| 128 | #if S_IFIFO != S_IFSOCK |
| 129 | case S_IFIFO: |
| 130 | return 'p'; |
| 131 | #endif |
| 132 | #endif |
| 133 | #ifdef S_IFNWK /* HP-UX */ |
| 134 | case S_IFNWK: |
| 135 | return 'n'; |
| 136 | #endif |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /* Look at read, write, and execute bits in BITS and set |
| 141 | flags in CHARS accordingly. */ |
| 142 | |
| 143 | static void |
| 144 | rwx (bits, chars) |
| 145 | unsigned short bits; |
| 146 | char *chars; |
| 147 | { |
| 148 | chars[0] = (bits & S_IREAD) ? 'r' : '-'; |
| 149 | chars[1] = (bits & S_IWRITE) ? 'w' : '-'; |
| 150 | chars[2] = (bits & S_IEXEC) ? 'x' : '-'; |
| 151 | } |
| 152 | |
| 153 | /* Set the 's' and 't' flags in file attributes string CHARS, |
| 154 | according to the file mode BITS. */ |
| 155 | |
| 156 | static void |
| 157 | setst (bits, chars) |
| 158 | unsigned short bits; |
| 159 | char *chars; |
| 160 | { |
| 161 | #ifdef S_ISUID |
| 162 | if (bits & S_ISUID) |
| 163 | { |
| 164 | if (chars[3] != 'x') |
| 165 | /* Set-uid, but not executable by owner. */ |
| 166 | chars[3] = 'S'; |
| 167 | else |
| 168 | chars[3] = 's'; |
| 169 | } |
| 170 | #endif |
| 171 | #ifdef S_ISGID |
| 172 | if (bits & S_ISGID) |
| 173 | { |
| 174 | if (chars[6] != 'x') |
| 175 | /* Set-gid, but not executable by group. */ |
| 176 | chars[6] = 'S'; |
| 177 | else |
| 178 | chars[6] = 's'; |
| 179 | } |
| 180 | #endif |
| 181 | #ifdef S_ISVTX |
| 182 | if (bits & S_ISVTX) |
| 183 | { |
| 184 | if (chars[9] != 'x') |
| 185 | /* Sticky, but not executable by others. */ |
| 186 | chars[9] = 'T'; |
| 187 | else |
| 188 | chars[9] = 't'; |
| 189 | } |
| 190 | #endif |
| 191 | } |
| 192 | |
| 193 | |