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umask.def

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1This file is umask.def, from which is created umask.c.-
2It implements the builtin "umask" in Bash.-
3-
4Copyright (C) 1987-2015 Free Software Foundation, Inc.-
5-
6This file is part of GNU Bash, the Bourne Again SHell.-
7-
8Bash is free software: you can redistribute it and/or modify-
9it under the terms of the GNU General Public License as published by-
10the Free Software Foundation, either version 3 of the License, or-
11(at your option) any later version.-
12-
13Bash is distributed in the hope that it will be useful,-
14but WITHOUT ANY WARRANTY; without even the implied warranty of-
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the-
16GNU General Public License for more details.-
17-
18You should have received a copy of the GNU General Public License-
19along with Bash. If not, see <http://www.gnu.org/licenses/>.-
20-
21$PRODUCES umask.c-
22-
23$BUILTIN umask-
24$FUNCTION umask_builtin-
25$SHORT_DOC umask [-p] [-S] [mode]-
26Display or set file mode mask.-
27-
28Sets the user file-creation mask to MODE. If MODE is omitted, prints-
29the current value of the mask.-
30-
31If MODE begins with a digit, it is interpreted as an octal number;-
32otherwise it is a symbolic mode string like that accepted by chmod(1).-
33-
34Options:-
35 -p if MODE is omitted, output in a form that may be reused as input-
36 -S makes the output symbolic; otherwise an octal number is output-
37-
38Exit Status:-
39Returns success unless MODE is invalid or an invalid option is given.-
40$END-
41-
42#include <config.h>-
43-
44#include "../bashtypes.h"-
45#include "filecntl.h"-
46#if ! defined(_MINIX) && defined (HAVE_SYS_FILE_H)-
47# include <sys/file.h>-
48#endif-
49-
50#if defined (HAVE_UNISTD_H)-
51#include <unistd.h>-
52#endif-
53-
54#include <stdio.h>-
55#include <chartypes.h>-
56-
57#include "../bashintl.h"-
58-
59#include "../shell.h"-
60#include "posixstat.h"-
61#include "common.h"-
62#include "bashgetopt.h"-
63-
64/* **************************************************************** */-
65/* */-
66/* UMASK Builtin and Helpers */-
67/* */-
68/* **************************************************************** */-
69-
70static void print_symbolic_umask __P((mode_t));-
71static int symbolic_umask __P((WORD_LIST *));-
72-
73/* Set or display the mask used by the system when creating files. Flag-
74 of -S means display the umask in a symbolic mode. */-
75int-
76umask_builtin (list)-
77 WORD_LIST *list;-
78{-
79 int print_symbolically, opt, umask_value, pflag;-
80 mode_t umask_arg;-
81-
82 print_symbolically = pflag = 0;-
83 reset_internal_getopt ();-
84 while ((opt = internal_getopt (list, "Sp")) != -1)
(opt = interna..., "Sp")) != -1Description
TRUEevaluated 78 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 121 times by 1 test
Evaluated by:
  • Self test
78-121
85 {-
86 switch (opt)-
87 {-
88 case 'S':
executed 55 times by 1 test: case 'S':
Executed by:
  • Self test
55
89 print_symbolically++;-
90 break;
executed 55 times by 1 test: break;
Executed by:
  • Self test
55
91 case 'p':
executed 18 times by 1 test: case 'p':
Executed by:
  • Self test
18
92 pflag++;-
93 break;
executed 18 times by 1 test: break;
Executed by:
  • Self test
18
94 CASE_HELPOPT;
never executed: return (258);
never executed: case -99:
0
95 default:
executed 5 times by 1 test: default:
Executed by:
  • Self test
5
96 builtin_usage ();-
97 return (EX_USAGE);
executed 5 times by 1 test: return (258);
Executed by:
  • Self test
5
98 }-
99 }-
100-
101 list = loptend;-
102-
103 if (list)
listDescription
TRUEevaluated 55 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 66 times by 1 test
Evaluated by:
  • Self test
55-66
104 {-
105 if (DIGIT (*list->word->word))
(*list->word->word) >= '0'Description
TRUEevaluated 55 times by 1 test
Evaluated by:
  • Self test
FALSEnever evaluated
(*list->word->word) <= '9'Description
TRUEevaluated 32 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 23 times by 1 test
Evaluated by:
  • Self test
0-55
106 {-
107 umask_value = read_octal (list->word->word);-
108-
109 /* Note that other shells just let you set the umask to zero-
110 by specifying a number out of range. This is a problem-
111 with those shells. We don't change the umask if the input-
112 is lousy. */-
113 if (umask_value == -1)
umask_value == -1Description
TRUEevaluated 5 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 27 times by 1 test
Evaluated by:
  • Self test
5-27
114 {-
115 sh_erange (list->word->word, _("octal number"));-
116 return (EXECUTION_FAILURE);
executed 5 times by 1 test: return (1);
Executed by:
  • Self test
5
117 }-
118 }
executed 27 times by 1 test: end of block
Executed by:
  • Self test
27
119 else-
120 {-
121 umask_value = symbolic_umask (list);-
122 if (umask_value == -1)
umask_value == -1Description
TRUEevaluated 14 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 9 times by 1 test
Evaluated by:
  • Self test
9-14
123 return (EXECUTION_FAILURE);
executed 14 times by 1 test: return (1);
Executed by:
  • Self test
14
124 }
executed 9 times by 1 test: end of block
Executed by:
  • Self test
9
125 umask_arg = (mode_t)umask_value;-
126 umask (umask_arg);-
127 if (print_symbolically)
print_symbolicallyDescription
TRUEevaluated 9 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 27 times by 1 test
Evaluated by:
  • Self test
9-27
128 print_symbolic_umask (umask_arg);
executed 9 times by 1 test: print_symbolic_umask (umask_arg);
Executed by:
  • Self test
9
129 }
executed 36 times by 1 test: end of block
Executed by:
  • Self test
36
130 else /* Display the UMASK for this user. */-
131 {-
132 umask_arg = umask (022);-
133 umask (umask_arg);-
134-
135 if (pflag)
pflagDescription
TRUEevaluated 18 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 48 times by 1 test
Evaluated by:
  • Self test
18-48
136 printf ("umask%s ", (print_symbolically ? " -S" : ""));
executed 18 times by 1 test: printf ("umask%s ", (print_symbolically ? " -S" : ""));
Executed by:
  • Self test
18
137 if (print_symbolically)
print_symbolicallyDescription
TRUEevaluated 36 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 30 times by 1 test
Evaluated by:
  • Self test
30-36
138 print_symbolic_umask (umask_arg);
executed 36 times by 1 test: print_symbolic_umask (umask_arg);
Executed by:
  • Self test
36
139 else-
140 printf ("%04lo\n", (unsigned long)umask_arg);
executed 30 times by 1 test: printf ("%04lo\n", (unsigned long)umask_arg);
Executed by:
  • Self test
30
141 }-
142-
143 return (sh_chkwrite (EXECUTION_SUCCESS));
executed 102 times by 1 test: return (sh_chkwrite (0));
Executed by:
  • Self test
102
144}-
145-
146/* Print the umask in a symbolic form. In the output, a letter is-
147 printed if the corresponding bit is clear in the umask. */-
148static void-
149#if defined (__STDC__)-
150print_symbolic_umask (mode_t um)-
151#else-
152print_symbolic_umask (um)-
153 mode_t um;-
154#endif-
155{-
156 char ubits[4], gbits[4], obits[4]; /* u=rwx,g=rwx,o=rwx */-
157 int i;-
158-
159 i = 0;-
160 if ((um & S_IRUSR) == 0)
(um & 0400 ) == 0Description
TRUEevaluated 45 times by 1 test
Evaluated by:
  • Self test
FALSEnever evaluated
0-45
161 ubits[i++] = 'r';
executed 45 times by 1 test: ubits[i++] = 'r';
Executed by:
  • Self test
45
162 if ((um & S_IWUSR) == 0)
(um & 0200 ) == 0Description
TRUEevaluated 45 times by 1 test
Evaluated by:
  • Self test
FALSEnever evaluated
0-45
163 ubits[i++] = 'w';
executed 45 times by 1 test: ubits[i++] = 'w';
Executed by:
  • Self test
45
164 if ((um & S_IXUSR) == 0)
(um & 0100 ) == 0Description
TRUEevaluated 45 times by 1 test
Evaluated by:
  • Self test
FALSEnever evaluated
0-45
165 ubits[i++] = 'x';
executed 45 times by 1 test: ubits[i++] = 'x';
Executed by:
  • Self test
45
166 ubits[i] = '\0';-
167-
168 i = 0;-
169 if ((um & S_IRGRP) == 0)
(um & (0400 >> 3) ) == 0Description
TRUEevaluated 45 times by 1 test
Evaluated by:
  • Self test
FALSEnever evaluated
0-45
170 gbits[i++] = 'r';
executed 45 times by 1 test: gbits[i++] = 'r';
Executed by:
  • Self test
45
171 if ((um & S_IWGRP) == 0)
(um & (0200 >> 3) ) == 0Description
TRUEevaluated 36 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 9 times by 1 test
Evaluated by:
  • Self test
9-36
172 gbits[i++] = 'w';
executed 36 times by 1 test: gbits[i++] = 'w';
Executed by:
  • Self test
36
173 if ((um & S_IXGRP) == 0)
(um & (0100 >> 3) ) == 0Description
TRUEevaluated 45 times by 1 test
Evaluated by:
  • Self test
FALSEnever evaluated
0-45
174 gbits[i++] = 'x';
executed 45 times by 1 test: gbits[i++] = 'x';
Executed by:
  • Self test
45
175 gbits[i] = '\0';-
176-
177 i = 0;-
178 if ((um & S_IROTH) == 0)
(um & ((0400 >...) >> 3) ) == 0Description
TRUEevaluated 45 times by 1 test
Evaluated by:
  • Self test
FALSEnever evaluated
0-45
179 obits[i++] = 'r';
executed 45 times by 1 test: obits[i++] = 'r';
Executed by:
  • Self test
45
180 if ((um & S_IWOTH) == 0)
(um & ((0200 >...) >> 3) ) == 0Description
TRUEevaluated 9 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 36 times by 1 test
Evaluated by:
  • Self test
9-36
181 obits[i++] = 'w';
executed 9 times by 1 test: obits[i++] = 'w';
Executed by:
  • Self test
9
182 if ((um & S_IXOTH) == 0)
(um & ((0100 >...) >> 3) ) == 0Description
TRUEevaluated 45 times by 1 test
Evaluated by:
  • Self test
FALSEnever evaluated
0-45
183 obits[i++] = 'x';
executed 45 times by 1 test: obits[i++] = 'x';
Executed by:
  • Self test
45
184 obits[i] = '\0';-
185-
186 printf ("u=%s,g=%s,o=%s\n", ubits, gbits, obits);-
187}
executed 45 times by 1 test: end of block
Executed by:
  • Self test
45
188-
189int-
190parse_symbolic_mode (mode, initial_bits)-
191 char *mode;-
192 int initial_bits;-
193{-
194 int who, op, perm, bits, c;-
195 char *s;-
196-
197 for (s = mode, bits = initial_bits;;)-
198 {-
199 who = op = perm = 0;-
200-
201 /* Parse the `who' portion of the symbolic mode clause. */-
202 while (member (*s, "agou"))
((*s) ? ((char...id *)0) ) : 0)Description
TRUEevaluated 41 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 41 times by 1 test
Evaluated by:
  • Self test
(*s)Description
TRUEevaluated 82 times by 1 test
Evaluated by:
  • Self test
FALSEnever evaluated
0-82
203 {-
204 switch (c = *s++)-
205 {-
206 case 'u':
executed 19 times by 1 test: case 'u':
Executed by:
  • Self test
19
207 who |= S_IRWXU;-
208 continue;
executed 19 times by 1 test: continue;
Executed by:
  • Self test
19
209 case 'g':
executed 13 times by 1 test: case 'g':
Executed by:
  • Self test
13
210 who |= S_IRWXG;-
211 continue;
executed 13 times by 1 test: continue;
Executed by:
  • Self test
13
212 case 'o':
executed 9 times by 1 test: case 'o':
Executed by:
  • Self test
9
213 who |= S_IRWXO;-
214 continue;
executed 9 times by 1 test: continue;
Executed by:
  • Self test
9
215 case 'a':
never executed: case 'a':
0
216 who |= S_IRWXU | S_IRWXG | S_IRWXO;-
217 continue;
never executed: continue;
0
218 default:
never executed: default:
0
219 break;
never executed: break;
0
220 }-
221 }-
222-
223 /* The operation is now sitting in *s. */-
224 op = *s++;-
225 switch (op)-
226 {-
227 case '+':
never executed: case '+':
0
228 case '-':
never executed: case '-':
0
229 case '=':
executed 36 times by 1 test: case '=':
Executed by:
  • Self test
36
230 break;
executed 36 times by 1 test: break;
Executed by:
  • Self test
36
231 default:
executed 5 times by 1 test: default:
Executed by:
  • Self test
5
232 builtin_error (_("`%c': invalid symbolic mode operator"), op);-
233 return (-1);
executed 5 times by 1 test: return (-1);
Executed by:
  • Self test
5
234 }-
235-
236 /* Parse out the `perm' section of the symbolic mode clause. */-
237 while (member (*s, "rwx"))
((*s) ? ((char...id *)0) ) : 0)Description
TRUEevaluated 87 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 36 times by 1 test
Evaluated by:
  • Self test
(*s)Description
TRUEevaluated 114 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 9 times by 1 test
Evaluated by:
  • Self test
9-114
238 {-
239 c = *s++;-
240-
241 switch (c)-
242 {-
243 case 'r':
executed 32 times by 1 test: case 'r':
Executed by:
  • Self test
32
244 perm |= S_IRUGO;-
245 break;
executed 32 times by 1 test: break;
Executed by:
  • Self test
32
246 case 'w':
executed 23 times by 1 test: case 'w':
Executed by:
  • Self test
23
247 perm |= S_IWUGO;-
248 break;
executed 23 times by 1 test: break;
Executed by:
  • Self test
23
249 case 'x':
executed 32 times by 1 test: case 'x':
Executed by:
  • Self test
32
250 perm |= S_IXUGO;-
251 break;
executed 32 times by 1 test: break;
Executed by:
  • Self test
32
252 }-
253 }
executed 87 times by 1 test: end of block
Executed by:
  • Self test
87
254-
255 /* Now perform the operation or return an error for a-
256 bad permission string. */-
257 if (!*s || *s == ',')
!*sDescription
TRUEevaluated 9 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 27 times by 1 test
Evaluated by:
  • Self test
*s == ','Description
TRUEevaluated 18 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 9 times by 1 test
Evaluated by:
  • Self test
9-27
258 {-
259 if (who)
whoDescription
TRUEevaluated 27 times by 1 test
Evaluated by:
  • Self test
FALSEnever evaluated
0-27
260 perm &= who;
executed 27 times by 1 test: perm &= who;
Executed by:
  • Self test
27
261-
262 switch (op)-
263 {-
264 case '+':
never executed: case '+':
0
265 bits |= perm;-
266 break;
never executed: break;
0
267 case '-':
never executed: case '-':
0
268 bits &= ~perm;-
269 break;
never executed: break;
0
270 case '=':
executed 27 times by 1 test: case '=':
Executed by:
  • Self test
27
271 if (who == 0)
who == 0Description
TRUEnever evaluated
FALSEevaluated 27 times by 1 test
Evaluated by:
  • Self test
0-27
272 who = S_IRWXU | S_IRWXG | S_IRWXO;
never executed: who = (0400|0200|0100) | ((0400|0200|0100) >> 3) | (((0400|0200|0100) >> 3) >> 3) ;
0
273 bits &= ~who;-
274 bits |= perm;-
275 break;
executed 27 times by 1 test: break;
Executed by:
  • Self test
27
276-
277 /* No other values are possible. */-
278 }-
279-
280 if (*s == '\0')
*s == '\0'Description
TRUEevaluated 9 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 18 times by 1 test
Evaluated by:
  • Self test
9-18
281 break;
executed 9 times by 1 test: break;
Executed by:
  • Self test
9
282 else-
283 s++; /* skip past ',' */
executed 18 times by 1 test: s++;
Executed by:
  • Self test
18
284 }-
285 else-
286 {-
287 builtin_error (_("`%c': invalid symbolic mode character"), *s);-
288 return (-1);
executed 9 times by 1 test: return (-1);
Executed by:
  • Self test
9
289 }-
290 }-
291-
292 return (bits);
executed 9 times by 1 test: return (bits);
Executed by:
  • Self test
9
293}-
294-
295/* Set the umask from a symbolic mode string similar to that accepted-
296 by chmod. If the -S argument is given, then print the umask in a-
297 symbolic form. */-
298static int-
299symbolic_umask (list)-
300 WORD_LIST *list;-
301{-
302 int um, bits;-
303-
304 /* Get the initial umask. Don't change it yet. */-
305 um = umask (022);-
306 umask (um);-
307-
308 /* All work is done with the complement of the umask -- it's-
309 more intuitive and easier to deal with. It is complemented-
310 again before being returned. */-
311 bits = parse_symbolic_mode (list->word->word, ~um & 0777);-
312 if (bits == -1)
bits == -1Description
TRUEevaluated 14 times by 1 test
Evaluated by:
  • Self test
FALSEevaluated 9 times by 1 test
Evaluated by:
  • Self test
9-14
313 return (-1);
executed 14 times by 1 test: return (-1);
Executed by:
  • Self test
14
314-
315 um = ~bits & 0777;-
316 return (um);
executed 9 times by 1 test: return (um);
Executed by:
  • Self test
9
317}-
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