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33682909 DL |
1 | /* filemode.c -- make a string describing file modes |
2 | Copyright (C) 1985, 1990, 1993 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, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
17 | USA. */ | |
18 | \f | |
19 | #ifdef HAVE_CONFIG_H | |
20 | #include <config.h> | |
21 | #endif | |
22 | ||
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | ||
26 | #if !S_IRUSR | |
27 | # if S_IREAD | |
28 | # define S_IRUSR S_IREAD | |
29 | # else | |
30 | # define S_IRUSR 00400 | |
31 | # endif | |
32 | #endif | |
33 | ||
34 | #if !S_IWUSR | |
35 | # if S_IWRITE | |
36 | # define S_IWUSR S_IWRITE | |
37 | # else | |
38 | # define S_IWUSR 00200 | |
39 | # endif | |
40 | #endif | |
41 | ||
42 | #if !S_IXUSR | |
43 | # if S_IEXEC | |
44 | # define S_IXUSR S_IEXEC | |
45 | # else | |
46 | # define S_IXUSR 00100 | |
47 | # endif | |
48 | #endif | |
49 | ||
50 | #ifdef STAT_MACROS_BROKEN | |
51 | #undef S_ISBLK | |
52 | #undef S_ISCHR | |
53 | #undef S_ISDIR | |
54 | #undef S_ISFIFO | |
55 | #undef S_ISLNK | |
56 | #undef S_ISMPB | |
57 | #undef S_ISMPC | |
58 | #undef S_ISNWK | |
59 | #undef S_ISREG | |
60 | #undef S_ISSOCK | |
61 | #endif /* STAT_MACROS_BROKEN. */ | |
62 | ||
63 | #if !defined(S_ISBLK) && defined(S_IFBLK) | |
64 | #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK) | |
65 | #endif | |
66 | #if !defined(S_ISCHR) && defined(S_IFCHR) | |
67 | #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR) | |
68 | #endif | |
69 | #if !defined(S_ISDIR) && defined(S_IFDIR) | |
70 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
71 | #endif | |
72 | #if !defined(S_ISREG) && defined(S_IFREG) | |
73 | #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) | |
74 | #endif | |
75 | #if !defined(S_ISFIFO) && defined(S_IFIFO) | |
76 | #define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) | |
77 | #endif | |
78 | #if !defined(S_ISLNK) && defined(S_IFLNK) | |
79 | #define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) | |
80 | #endif | |
81 | #if !defined(S_ISSOCK) && defined(S_IFSOCK) | |
82 | #define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK) | |
83 | #endif | |
84 | #if !defined(S_ISMPB) && defined(S_IFMPB) /* V7 */ | |
85 | #define S_ISMPB(m) (((m) & S_IFMT) == S_IFMPB) | |
86 | #define S_ISMPC(m) (((m) & S_IFMT) == S_IFMPC) | |
87 | #endif | |
88 | #if !defined(S_ISNWK) && defined(S_IFNWK) /* HP/UX */ | |
89 | #define S_ISNWK(m) (((m) & S_IFMT) == S_IFNWK) | |
90 | #endif | |
91 | ||
92 | void mode_string (); | |
93 | static char ftypelet (); | |
94 | static void rwx (); | |
95 | static void setst (); | |
96 | ||
97 | /* filemodestring - fill in string STR with an ls-style ASCII | |
98 | representation of the st_mode field of file stats block STATP. | |
99 | 10 characters are stored in STR; no terminating null is added. | |
100 | The characters stored in STR are: | |
101 | ||
102 | 0 File type. 'd' for directory, 'c' for character | |
103 | special, 'b' for block special, 'm' for multiplex, | |
104 | 'l' for symbolic link, 's' for socket, 'p' for fifo, | |
105 | '-' for regular, '?' for any other file type | |
106 | ||
107 | 1 'r' if the owner may read, '-' otherwise. | |
108 | ||
109 | 2 'w' if the owner may write, '-' otherwise. | |
110 | ||
111 | 3 'x' if the owner may execute, 's' if the file is | |
112 | set-user-id, '-' otherwise. | |
113 | 'S' if the file is set-user-id, but the execute | |
114 | bit isn't set. | |
115 | ||
116 | 4 'r' if group members may read, '-' otherwise. | |
117 | ||
118 | 5 'w' if group members may write, '-' otherwise. | |
119 | ||
120 | 6 'x' if group members may execute, 's' if the file is | |
121 | set-group-id, '-' otherwise. | |
122 | 'S' if it is set-group-id but not executable. | |
123 | ||
124 | 7 'r' if any user may read, '-' otherwise. | |
125 | ||
126 | 8 'w' if any user may write, '-' otherwise. | |
127 | ||
128 | 9 'x' if any user may execute, 't' if the file is "sticky" | |
129 | (will be retained in swap space after execution), '-' | |
130 | otherwise. | |
131 | 'T' if the file is sticky but not executable. */ | |
132 | ||
133 | void | |
134 | filemodestring (statp, str) | |
135 | struct stat *statp; | |
136 | char *str; | |
137 | { | |
138 | mode_string (statp->st_mode, str); | |
139 | } | |
140 | ||
141 | /* Like filemodestring, but only the relevant part of the `struct stat' | |
142 | is given as an argument. */ | |
143 | ||
144 | void | |
145 | mode_string (mode, str) | |
146 | unsigned short mode; | |
147 | char *str; | |
148 | { | |
149 | str[0] = ftypelet ((long) mode); | |
150 | rwx ((mode & 0700) << 0, &str[1]); | |
151 | rwx ((mode & 0070) << 3, &str[4]); | |
152 | rwx ((mode & 0007) << 6, &str[7]); | |
153 | setst (mode, str); | |
154 | } | |
155 | ||
156 | /* Return a character indicating the type of file described by | |
157 | file mode BITS: | |
158 | 'd' for directories | |
159 | 'b' for block special files | |
160 | 'c' for character special files | |
161 | 'm' for multiplexor files | |
162 | 'l' for symbolic links | |
163 | 's' for sockets | |
164 | 'p' for fifos | |
165 | '-' for regular files | |
166 | '?' for any other file type. */ | |
167 | ||
168 | static char | |
169 | ftypelet (bits) | |
170 | long bits; | |
171 | { | |
172 | #ifdef S_ISBLK | |
173 | if (S_ISBLK (bits)) | |
174 | return 'b'; | |
175 | #endif | |
176 | if (S_ISCHR (bits)) | |
177 | return 'c'; | |
178 | if (S_ISDIR (bits)) | |
179 | return 'd'; | |
180 | if (S_ISREG (bits)) | |
181 | return '-'; | |
182 | #ifdef S_ISFIFO | |
183 | if (S_ISFIFO (bits)) | |
184 | return 'p'; | |
185 | #endif | |
186 | #ifdef S_ISLNK | |
187 | if (S_ISLNK (bits)) | |
188 | return 'l'; | |
189 | #endif | |
190 | #ifdef S_ISSOCK | |
191 | if (S_ISSOCK (bits)) | |
192 | return 's'; | |
193 | #endif | |
194 | #ifdef S_ISMPC | |
195 | if (S_ISMPC (bits)) | |
196 | return 'm'; | |
197 | #endif | |
198 | #ifdef S_ISNWK | |
199 | if (S_ISNWK (bits)) | |
200 | return 'n'; | |
201 | #endif | |
202 | return '?'; | |
203 | } | |
204 | ||
205 | /* Look at read, write, and execute bits in BITS and set | |
206 | flags in CHARS accordingly. */ | |
207 | ||
208 | static void | |
209 | rwx (bits, chars) | |
210 | unsigned short bits; | |
211 | char *chars; | |
212 | { | |
213 | chars[0] = (bits & S_IRUSR) ? 'r' : '-'; | |
214 | chars[1] = (bits & S_IWUSR) ? 'w' : '-'; | |
215 | chars[2] = (bits & S_IXUSR) ? 'x' : '-'; | |
216 | } | |
217 | ||
218 | /* Set the 's' and 't' flags in file attributes string CHARS, | |
219 | according to the file mode BITS. */ | |
220 | ||
221 | static void | |
222 | setst (bits, chars) | |
223 | unsigned short bits; | |
224 | char *chars; | |
225 | { | |
226 | #ifdef S_ISUID | |
227 | if (bits & S_ISUID) | |
228 | { | |
229 | if (chars[3] != 'x') | |
230 | /* Set-uid, but not executable by owner. */ | |
231 | chars[3] = 'S'; | |
232 | else | |
233 | chars[3] = 's'; | |
234 | } | |
235 | #endif | |
236 | #ifdef S_ISGID | |
237 | if (bits & S_ISGID) | |
238 | { | |
239 | if (chars[6] != 'x') | |
240 | /* Set-gid, but not executable by group. */ | |
241 | chars[6] = 'S'; | |
242 | else | |
243 | chars[6] = 's'; | |
244 | } | |
245 | #endif | |
246 | #ifdef S_ISVTX | |
247 | if (bits & S_ISVTX) | |
248 | { | |
249 | if (chars[9] != 'x') | |
250 | /* Sticky, but not executable by others. */ | |
251 | chars[9] = 'T'; | |
252 | else | |
253 | chars[9] = 't'; | |
254 | } | |
255 | #endif | |
256 | } |