1 /* filemode.c -- make a string describing file modes
2 Copyright (C) 1985, 1990, 1993 Free Software Foundation, Inc.
4 This file is part of XEmacs.
6 XEmacs is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* Synched up with: FSF 19.30. */
28 static void mode_string (unsigned short mode, char *str);
29 static char ftypelet (mode_t bits);
30 static void rwx (unsigned short bits, char *chars);
31 static void setst (unsigned short bits, char *chars);
33 /* filemodestring - fill in string STR with an ls-style ASCII
34 representation of the st_mode field of file stats block STATP.
35 10 characters are stored in STR; no terminating null is added.
36 The characters stored in STR are:
38 0 File type. 'd' for directory, 'c' for character
39 special, 'b' for block special, 'm' for multiplex,
40 'l' for symbolic link, 's' for socket, 'p' for fifo,
41 '-' for regular, '?' for any other file type
43 1 'r' if the owner may read, '-' otherwise.
45 2 'w' if the owner may write, '-' otherwise.
47 3 'x' if the owner may execute, 's' if the file is
48 set-user-id, '-' otherwise.
49 'S' if the file is set-user-id, but the execute
52 4 'r' if group members may read, '-' otherwise.
54 5 'w' if group members may write, '-' otherwise.
56 6 'x' if group members may execute, 's' if the file is
57 set-group-id, '-' otherwise.
58 'S' if it is set-group-id but not executable.
60 7 'r' if any user may read, '-' otherwise.
62 8 'w' if any user may write, '-' otherwise.
64 9 'x' if any user may execute, 't' if the file is "sticky"
65 (will be retained in swap space after execution), '-'
67 'T' if the file is sticky but not executable. */
70 filemodestring (struct stat *statp, char *str)
72 mode_string (statp->st_mode, str);
75 /* Like filemodestring, but only the relevant part of the `struct stat'
76 is given as an argument. */
79 mode_string (unsigned short mode, char *str)
81 str[0] = ftypelet (mode);
82 rwx ((unsigned short) ((mode & 0700) << 0), &str[1]);
83 rwx ((unsigned short) ((mode & 0070) << 3), &str[4]);
84 rwx ((unsigned short) ((mode & 0007) << 6), &str[7]);
88 /* Return a character indicating the type of file described by
91 'b' for block special files
92 'c' for character special files
93 'm' for multiplexor files
94 'l' for symbolic links
98 '?' for any other file type. */
101 ftypelet (mode_t bits)
136 /* Look at read, write, and execute bits in BITS and set
137 flags in CHARS accordingly. */
140 rwx (unsigned short bits, char *chars)
142 chars[0] = (bits & S_IRUSR) ? 'r' : '-';
143 chars[1] = (bits & S_IWUSR) ? 'w' : '-';
144 chars[2] = (bits & S_IXUSR) ? 'x' : '-';
147 /* Set the 's' and 't' flags in file attributes string CHARS,
148 according to the file mode BITS. */
151 setst (unsigned short bits, char *chars)
157 /* Set-uid, but not executable by owner. */
167 /* Set-gid, but not executable by group. */
177 /* Sticky, but not executable by others. */