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33682909 | 1 | /* filemode.c -- make a string describing file modes |
73b0cd50 | 2 | Copyright (C) 1985, 1990, 1993, 2001-2011 Free Software Foundation, Inc. |
33682909 DL |
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 | |
684d6f5b | 6 | the Free Software Foundation; either version 3, or (at your option) |
33682909 DL |
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 | |
4fc5845f | 16 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
33682909 DL |
17 | USA. */ |
18 | \f | |
33682909 | 19 | #include <config.h> |
33682909 DL |
20 | #include <sys/types.h> |
21 | #include <sys/stat.h> | |
22 | ||
23 | #if !S_IRUSR | |
24 | # if S_IREAD | |
25 | # define S_IRUSR S_IREAD | |
26 | # else | |
27 | # define S_IRUSR 00400 | |
28 | # endif | |
29 | #endif | |
30 | ||
31 | #if !S_IWUSR | |
32 | # if S_IWRITE | |
33 | # define S_IWUSR S_IWRITE | |
34 | # else | |
35 | # define S_IWUSR 00200 | |
36 | # endif | |
37 | #endif | |
38 | ||
39 | #if !S_IXUSR | |
40 | # if S_IEXEC | |
41 | # define S_IXUSR S_IEXEC | |
42 | # else | |
43 | # define S_IXUSR 00100 | |
44 | # endif | |
45 | #endif | |
46 | ||
47 | #ifdef STAT_MACROS_BROKEN | |
48 | #undef S_ISBLK | |
49 | #undef S_ISCHR | |
50 | #undef S_ISDIR | |
51 | #undef S_ISFIFO | |
52 | #undef S_ISLNK | |
53 | #undef S_ISMPB | |
54 | #undef S_ISMPC | |
55 | #undef S_ISNWK | |
56 | #undef S_ISREG | |
57 | #undef S_ISSOCK | |
58 | #endif /* STAT_MACROS_BROKEN. */ | |
59 | ||
60 | #if !defined(S_ISBLK) && defined(S_IFBLK) | |
61 | #define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK) | |
62 | #endif | |
63 | #if !defined(S_ISCHR) && defined(S_IFCHR) | |
64 | #define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR) | |
65 | #endif | |
66 | #if !defined(S_ISDIR) && defined(S_IFDIR) | |
67 | #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) | |
68 | #endif | |
69 | #if !defined(S_ISREG) && defined(S_IFREG) | |
70 | #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) | |
71 | #endif | |
72 | #if !defined(S_ISFIFO) && defined(S_IFIFO) | |
73 | #define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO) | |
74 | #endif | |
75 | #if !defined(S_ISLNK) && defined(S_IFLNK) | |
76 | #define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK) | |
77 | #endif | |
78 | #if !defined(S_ISSOCK) && defined(S_IFSOCK) | |
79 | #define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK) | |
80 | #endif | |
81 | #if !defined(S_ISMPB) && defined(S_IFMPB) /* V7 */ | |
82 | #define S_ISMPB(m) (((m) & S_IFMT) == S_IFMPB) | |
83 | #define S_ISMPC(m) (((m) & S_IFMT) == S_IFMPC) | |
84 | #endif | |
85 | #if !defined(S_ISNWK) && defined(S_IFNWK) /* HP/UX */ | |
86 | #define S_ISNWK(m) (((m) & S_IFMT) == S_IFNWK) | |
87 | #endif | |
88 | ||
971de7fb DN |
89 | void mode_string (short unsigned int mode, char *str); |
90 | static char ftypelet (long int bits); | |
91 | static void rwx (short unsigned int bits, char *chars); | |
92 | static void setst (short unsigned int bits, char *chars); | |
33682909 DL |
93 | |
94 | /* filemodestring - fill in string STR with an ls-style ASCII | |
95 | representation of the st_mode field of file stats block STATP. | |
96 | 10 characters are stored in STR; no terminating null is added. | |
97 | The characters stored in STR are: | |
98 | ||
99 | 0 File type. 'd' for directory, 'c' for character | |
100 | special, 'b' for block special, 'm' for multiplex, | |
101 | 'l' for symbolic link, 's' for socket, 'p' for fifo, | |
102 | '-' for regular, '?' for any other file type | |
103 | ||
104 | 1 'r' if the owner may read, '-' otherwise. | |
105 | ||
106 | 2 'w' if the owner may write, '-' otherwise. | |
107 | ||
108 | 3 'x' if the owner may execute, 's' if the file is | |
109 | set-user-id, '-' otherwise. | |
110 | 'S' if the file is set-user-id, but the execute | |
111 | bit isn't set. | |
112 | ||
113 | 4 'r' if group members may read, '-' otherwise. | |
114 | ||
115 | 5 'w' if group members may write, '-' otherwise. | |
116 | ||
117 | 6 'x' if group members may execute, 's' if the file is | |
118 | set-group-id, '-' otherwise. | |
119 | 'S' if it is set-group-id but not executable. | |
120 | ||
121 | 7 'r' if any user may read, '-' otherwise. | |
122 | ||
123 | 8 'w' if any user may write, '-' otherwise. | |
124 | ||
125 | 9 'x' if any user may execute, 't' if the file is "sticky" | |
126 | (will be retained in swap space after execution), '-' | |
127 | otherwise. | |
128 | 'T' if the file is sticky but not executable. */ | |
129 | ||
130 | void | |
971de7fb | 131 | filemodestring (struct stat *statp, char *str) |
33682909 DL |
132 | { |
133 | mode_string (statp->st_mode, str); | |
134 | } | |
135 | ||
136 | /* Like filemodestring, but only the relevant part of the `struct stat' | |
137 | is given as an argument. */ | |
138 | ||
139 | void | |
971de7fb | 140 | mode_string (short unsigned int mode, char *str) |
33682909 DL |
141 | { |
142 | str[0] = ftypelet ((long) mode); | |
143 | rwx ((mode & 0700) << 0, &str[1]); | |
144 | rwx ((mode & 0070) << 3, &str[4]); | |
145 | rwx ((mode & 0007) << 6, &str[7]); | |
146 | setst (mode, str); | |
147 | } | |
148 | ||
149 | /* Return a character indicating the type of file described by | |
150 | file mode BITS: | |
151 | 'd' for directories | |
152 | 'b' for block special files | |
153 | 'c' for character special files | |
154 | 'm' for multiplexor files | |
155 | 'l' for symbolic links | |
156 | 's' for sockets | |
157 | 'p' for fifos | |
158 | '-' for regular files | |
159 | '?' for any other file type. */ | |
160 | ||
161 | static char | |
971de7fb | 162 | ftypelet (long int bits) |
33682909 DL |
163 | { |
164 | #ifdef S_ISBLK | |
165 | if (S_ISBLK (bits)) | |
166 | return 'b'; | |
167 | #endif | |
168 | if (S_ISCHR (bits)) | |
169 | return 'c'; | |
170 | if (S_ISDIR (bits)) | |
171 | return 'd'; | |
172 | if (S_ISREG (bits)) | |
173 | return '-'; | |
174 | #ifdef S_ISFIFO | |
175 | if (S_ISFIFO (bits)) | |
176 | return 'p'; | |
177 | #endif | |
178 | #ifdef S_ISLNK | |
179 | if (S_ISLNK (bits)) | |
180 | return 'l'; | |
181 | #endif | |
182 | #ifdef S_ISSOCK | |
183 | if (S_ISSOCK (bits)) | |
184 | return 's'; | |
185 | #endif | |
186 | #ifdef S_ISMPC | |
187 | if (S_ISMPC (bits)) | |
188 | return 'm'; | |
189 | #endif | |
190 | #ifdef S_ISNWK | |
191 | if (S_ISNWK (bits)) | |
192 | return 'n'; | |
193 | #endif | |
194 | return '?'; | |
195 | } | |
196 | ||
197 | /* Look at read, write, and execute bits in BITS and set | |
198 | flags in CHARS accordingly. */ | |
199 | ||
200 | static void | |
971de7fb | 201 | rwx (short unsigned int bits, char *chars) |
33682909 DL |
202 | { |
203 | chars[0] = (bits & S_IRUSR) ? 'r' : '-'; | |
204 | chars[1] = (bits & S_IWUSR) ? 'w' : '-'; | |
205 | chars[2] = (bits & S_IXUSR) ? 'x' : '-'; | |
206 | } | |
207 | ||
208 | /* Set the 's' and 't' flags in file attributes string CHARS, | |
209 | according to the file mode BITS. */ | |
210 | ||
211 | static void | |
971de7fb | 212 | setst (short unsigned int bits, char *chars) |
33682909 DL |
213 | { |
214 | #ifdef S_ISUID | |
215 | if (bits & S_ISUID) | |
216 | { | |
217 | if (chars[3] != 'x') | |
218 | /* Set-uid, but not executable by owner. */ | |
219 | chars[3] = 'S'; | |
220 | else | |
221 | chars[3] = 's'; | |
222 | } | |
223 | #endif | |
224 | #ifdef S_ISGID | |
225 | if (bits & S_ISGID) | |
226 | { | |
227 | if (chars[6] != 'x') | |
228 | /* Set-gid, but not executable by group. */ | |
229 | chars[6] = 'S'; | |
230 | else | |
231 | chars[6] = 's'; | |
232 | } | |
233 | #endif | |
234 | #ifdef S_ISVTX | |
235 | if (bits & S_ISVTX) | |
236 | { | |
237 | if (chars[9] != 'x') | |
238 | /* Sticky, but not executable by others. */ | |
239 | chars[9] = 'T'; | |
240 | else | |
241 | chars[9] = 't'; | |
242 | } | |
243 | #endif | |
244 | } | |
ab5796a9 | 245 |