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1 | /* filemode.c -- make a string describing file modes |
2 | ||
9ff99d22 | 3 | Copyright (C) 1985, 1990, 1993, 1998-2000, 2004, 2006, 2009-2013 Free |
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4 | Software Foundation, Inc. |
5 | ||
6 | This program is free software: you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <config.h> | |
20 | ||
21 | #include "filemode.h" | |
22 | ||
23 | /* The following is for Cray DMF (Data Migration Facility), which is a | |
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24 | HSM file system. A migrated file has a 'st_dm_mode' that is |
25 | different from the normal 'st_mode', so any tests for migrated | |
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26 | files should use the former. */ |
27 | #if HAVE_ST_DM_MODE | |
28 | # define IS_MIGRATED_FILE(statp) \ | |
29 | (S_ISOFD (statp->st_dm_mode) || S_ISOFL (statp->st_dm_mode)) | |
30 | #else | |
31 | # define IS_MIGRATED_FILE(statp) 0 | |
32 | #endif | |
33 | ||
34 | #if ! HAVE_DECL_STRMODE | |
35 | ||
36 | /* Return a character indicating the type of file described by | |
37 | file mode BITS: | |
38 | '-' regular file | |
39 | 'b' block special file | |
40 | 'c' character special file | |
41 | 'C' high performance ("contiguous data") file | |
42 | 'd' directory | |
43 | 'D' door | |
44 | 'l' symbolic link | |
45 | 'm' multiplexed file (7th edition Unix; obsolete) | |
46 | 'n' network special file (HP-UX) | |
47 | 'p' fifo (named pipe) | |
48 | 'P' port | |
49 | 's' socket | |
50 | 'w' whiteout (4.4BSD) | |
51 | '?' some other file type */ | |
52 | ||
53 | static char | |
54 | ftypelet (mode_t bits) | |
55 | { | |
56 | /* These are the most common, so test for them first. */ | |
57 | if (S_ISREG (bits)) | |
58 | return '-'; | |
59 | if (S_ISDIR (bits)) | |
60 | return 'd'; | |
61 | ||
62 | /* Other letters standardized by POSIX 1003.1-2004. */ | |
63 | if (S_ISBLK (bits)) | |
64 | return 'b'; | |
65 | if (S_ISCHR (bits)) | |
66 | return 'c'; | |
67 | if (S_ISLNK (bits)) | |
68 | return 'l'; | |
69 | if (S_ISFIFO (bits)) | |
70 | return 'p'; | |
71 | ||
72 | /* Other file types (though not letters) standardized by POSIX. */ | |
73 | if (S_ISSOCK (bits)) | |
74 | return 's'; | |
75 | ||
76 | /* Nonstandard file types. */ | |
77 | if (S_ISCTG (bits)) | |
78 | return 'C'; | |
79 | if (S_ISDOOR (bits)) | |
80 | return 'D'; | |
219023c4 | 81 | if (S_ISMPB (bits) || S_ISMPC (bits) || S_ISMPX (bits)) |
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82 | return 'm'; |
83 | if (S_ISNWK (bits)) | |
84 | return 'n'; | |
85 | if (S_ISPORT (bits)) | |
86 | return 'P'; | |
87 | if (S_ISWHT (bits)) | |
88 | return 'w'; | |
89 | ||
90 | return '?'; | |
91 | } | |
92 | ||
93 | /* Like filemodestring, but rely only on MODE. */ | |
94 | ||
95 | void | |
96 | strmode (mode_t mode, char *str) | |
97 | { | |
98 | str[0] = ftypelet (mode); | |
99 | str[1] = mode & S_IRUSR ? 'r' : '-'; | |
100 | str[2] = mode & S_IWUSR ? 'w' : '-'; | |
101 | str[3] = (mode & S_ISUID | |
102 | ? (mode & S_IXUSR ? 's' : 'S') | |
103 | : (mode & S_IXUSR ? 'x' : '-')); | |
104 | str[4] = mode & S_IRGRP ? 'r' : '-'; | |
105 | str[5] = mode & S_IWGRP ? 'w' : '-'; | |
106 | str[6] = (mode & S_ISGID | |
107 | ? (mode & S_IXGRP ? 's' : 'S') | |
108 | : (mode & S_IXGRP ? 'x' : '-')); | |
109 | str[7] = mode & S_IROTH ? 'r' : '-'; | |
110 | str[8] = mode & S_IWOTH ? 'w' : '-'; | |
111 | str[9] = (mode & S_ISVTX | |
112 | ? (mode & S_IXOTH ? 't' : 'T') | |
113 | : (mode & S_IXOTH ? 'x' : '-')); | |
114 | str[10] = ' '; | |
115 | str[11] = '\0'; | |
116 | } | |
117 | ||
118 | #endif /* ! HAVE_DECL_STRMODE */ | |
119 | ||
120 | /* filemodestring - fill in string STR with an ls-style ASCII | |
121 | representation of the st_mode field of file stats block STATP. | |
122 | 12 characters are stored in STR. | |
123 | The characters stored in STR are: | |
124 | ||
125 | 0 File type, as in ftypelet above, except that other letters are used | |
126 | for files whose type cannot be determined solely from st_mode: | |
127 | ||
128 | 'F' semaphore | |
129 | 'M' migrated file (Cray DMF) | |
130 | 'Q' message queue | |
131 | 'S' shared memory object | |
132 | 'T' typed memory object | |
133 | ||
134 | 1 'r' if the owner may read, '-' otherwise. | |
135 | ||
136 | 2 'w' if the owner may write, '-' otherwise. | |
137 | ||
138 | 3 'x' if the owner may execute, 's' if the file is | |
139 | set-user-id, '-' otherwise. | |
140 | 'S' if the file is set-user-id, but the execute | |
141 | bit isn't set. | |
142 | ||
143 | 4 'r' if group members may read, '-' otherwise. | |
144 | ||
145 | 5 'w' if group members may write, '-' otherwise. | |
146 | ||
147 | 6 'x' if group members may execute, 's' if the file is | |
148 | set-group-id, '-' otherwise. | |
149 | 'S' if it is set-group-id but not executable. | |
150 | ||
151 | 7 'r' if any user may read, '-' otherwise. | |
152 | ||
153 | 8 'w' if any user may write, '-' otherwise. | |
154 | ||
155 | 9 'x' if any user may execute, 't' if the file is "sticky" | |
156 | (will be retained in swap space after execution), '-' | |
157 | otherwise. | |
158 | 'T' if the file is sticky but not executable. | |
159 | ||
160 | 10 ' ' for compatibility with 4.4BSD strmode, | |
161 | since this interface does not support ACLs. | |
162 | ||
163 | 11 '\0'. */ | |
164 | ||
165 | void | |
166 | filemodestring (struct stat const *statp, char *str) | |
167 | { | |
168 | strmode (statp->st_mode, str); | |
169 | ||
170 | if (S_TYPEISSEM (statp)) | |
171 | str[0] = 'F'; | |
172 | else if (IS_MIGRATED_FILE (statp)) | |
173 | str[0] = 'M'; | |
174 | else if (S_TYPEISMQ (statp)) | |
175 | str[0] = 'Q'; | |
176 | else if (S_TYPEISSHM (statp)) | |
177 | str[0] = 'S'; | |
178 | else if (S_TYPEISTMO (statp)) | |
179 | str[0] = 'T'; | |
180 | } |