]>
Commit | Line | Data |
---|---|---|
726f6388 JA |
1 | /* GNU test program (ksb and mjb) */ |
2 | ||
3 | /* Modified to run with the GNU shell Apr 25, 1988 by bfox. */ | |
4 | ||
7117c2d2 | 5 | /* Copyright (C) 1987-2002 Free Software Foundation, Inc. |
726f6388 JA |
6 | |
7 | This file is part of GNU Bash, the Bourne Again SHell. | |
8 | ||
9 | Bash is free software; you can redistribute it and/or modify it under | |
10 | the terms of the GNU General Public License as published by the Free | |
11 | Software Foundation; either version 2, or (at your option) any later | |
12 | version. | |
13 | ||
14 | Bash is distributed in the hope that it will be useful, but WITHOUT ANY | |
15 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
17 | for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License along | |
20 | with Bash; see the file COPYING. If not, write to the Free Software | |
bb70624e | 21 | Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
726f6388 | 22 | |
ccc6cda3 JA |
23 | /* Define PATTERN_MATCHING to get the csh-like =~ and !~ pattern-matching |
24 | binary operators. */ | |
25 | /* #define PATTERN_MATCHING */ | |
26 | ||
27 | #if defined (HAVE_CONFIG_H) | |
28 | # include <config.h> | |
29 | #endif | |
30 | ||
726f6388 | 31 | #include <stdio.h> |
ccc6cda3 | 32 | |
d166f048 | 33 | #include "bashtypes.h" |
ccc6cda3 | 34 | |
f73dda09 | 35 | #if !defined (HAVE_LIMITS_H) |
ccc6cda3 JA |
36 | # include <sys/param.h> |
37 | #endif | |
38 | ||
39 | #if defined (HAVE_UNISTD_H) | |
40 | # include <unistd.h> | |
41 | #endif | |
42 | ||
e8ce775d JA |
43 | #include <errno.h> |
44 | #if !defined (errno) | |
45 | extern int errno; | |
46 | #endif /* !errno */ | |
47 | ||
b80f6443 | 48 | #if !defined (_POSIX_VERSION) && defined (HAVE_SYS_FILE_H) |
ccc6cda3 JA |
49 | # include <sys/file.h> |
50 | #endif /* !_POSIX_VERSION */ | |
51 | #include "posixstat.h" | |
52 | #include "filecntl.h" | |
726f6388 | 53 | |
b80f6443 JA |
54 | #include "bashintl.h" |
55 | ||
d166f048 | 56 | #include "shell.h" |
cce855bc JA |
57 | #include "pathexp.h" |
58 | #include "test.h" | |
d166f048 | 59 | #include "builtins/common.h" |
726f6388 | 60 | |
f73dda09 | 61 | #include <glob/strmatch.h> |
cce855bc | 62 | |
726f6388 JA |
63 | #if !defined (STRLEN) |
64 | # define STRLEN(s) ((s)[0] ? ((s)[1] ? ((s)[2] ? strlen(s) : 2) : 1) : 0) | |
65 | #endif | |
66 | ||
726f6388 JA |
67 | #if !defined (STREQ) |
68 | # define STREQ(a, b) ((a)[0] == (b)[0] && strcmp (a, b) == 0) | |
69 | #endif /* !STREQ */ | |
70 | ||
726f6388 JA |
71 | #if !defined (R_OK) |
72 | #define R_OK 4 | |
73 | #define W_OK 2 | |
74 | #define X_OK 1 | |
75 | #define F_OK 0 | |
76 | #endif /* R_OK */ | |
77 | ||
ccc6cda3 JA |
78 | #define EQ 0 |
79 | #define NE 1 | |
80 | #define LT 2 | |
81 | #define GT 3 | |
82 | #define LE 4 | |
83 | #define GE 5 | |
84 | ||
85 | #define NT 0 | |
86 | #define OT 1 | |
87 | #define EF 2 | |
88 | ||
726f6388 JA |
89 | /* The following few defines control the truth and false output of each stage. |
90 | TRUE and FALSE are what we use to compute the final output value. | |
91 | SHELL_BOOLEAN is the form which returns truth or falseness in shell terms. | |
ccc6cda3 | 92 | Default is TRUE = 1, FALSE = 0, SHELL_BOOLEAN = (!value). */ |
726f6388 JA |
93 | #define TRUE 1 |
94 | #define FALSE 0 | |
95 | #define SHELL_BOOLEAN(value) (!(value)) | |
726f6388 | 96 | |
b72432fd JA |
97 | #define TEST_ERREXIT_STATUS 2 |
98 | ||
ccc6cda3 JA |
99 | static procenv_t test_exit_buf; |
100 | static int test_error_return; | |
d166f048 | 101 | #define test_exit(val) \ |
726f6388 | 102 | do { test_error_return = val; longjmp (test_exit_buf, 1); } while (0) |
726f6388 | 103 | |
cce855bc JA |
104 | /* We have to use access(2) for machines running AFS, because it's |
105 | not a Unix file system. This may produce incorrect answers for | |
106 | non-AFS files. I hate AFS. */ | |
726f6388 | 107 | #if defined (AFS) |
726f6388 JA |
108 | # define EACCESS(path, mode) access(path, mode) |
109 | #else | |
ccc6cda3 | 110 | # define EACCESS(path, mode) test_eaccess(path, mode) |
726f6388 JA |
111 | #endif /* AFS */ |
112 | ||
113 | static int pos; /* The offset of the current argument in ARGV. */ | |
114 | static int argc; /* The number of arguments present in ARGV. */ | |
115 | static char **argv; /* The argument list. */ | |
116 | static int noeval; | |
117 | ||
f73dda09 JA |
118 | static void test_syntax_error __P((char *, char *)) __attribute__((__noreturn__)); |
119 | static void beyond __P((void)) __attribute__((__noreturn__)); | |
120 | static void integer_expected_error __P((char *)) __attribute__((__noreturn__)); | |
121 | ||
122 | static int test_stat __P((char *, struct stat *)); | |
123 | ||
124 | static int unary_operator __P((void)); | |
125 | static int binary_operator __P((void)); | |
126 | static int two_arguments __P((void)); | |
127 | static int three_arguments __P((void)); | |
128 | static int posixtest __P((void)); | |
726f6388 | 129 | |
f73dda09 JA |
130 | static int expr __P((void)); |
131 | static int term __P((void)); | |
132 | static int and __P((void)); | |
133 | static int or __P((void)); | |
726f6388 | 134 | |
f73dda09 JA |
135 | static int filecomp __P((char *, char *, int)); |
136 | static int arithcomp __P((char *, char *, int, int)); | |
137 | static int patcomp __P((char *, char *, int)); | |
ccc6cda3 | 138 | |
726f6388 JA |
139 | static void |
140 | test_syntax_error (format, arg) | |
141 | char *format, *arg; | |
142 | { | |
7117c2d2 | 143 | builtin_error (format, arg); |
b72432fd | 144 | test_exit (TEST_ERREXIT_STATUS); |
726f6388 JA |
145 | } |
146 | ||
cce855bc JA |
147 | /* |
148 | * beyond - call when we're beyond the end of the argument list (an | |
149 | * error condition) | |
150 | */ | |
151 | static void | |
152 | beyond () | |
153 | { | |
b80f6443 | 154 | test_syntax_error (_("argument expected"), (char *)NULL); |
cce855bc JA |
155 | } |
156 | ||
157 | /* Syntax error for when an integer argument was expected, but | |
158 | something else was found. */ | |
159 | static void | |
160 | integer_expected_error (pch) | |
161 | char *pch; | |
162 | { | |
b80f6443 | 163 | test_syntax_error (_("%s: integer expression expected"), pch); |
cce855bc JA |
164 | } |
165 | ||
726f6388 JA |
166 | /* A wrapper for stat () which disallows pathnames that are empty strings |
167 | and handles /dev/fd emulation on systems that don't have it. */ | |
168 | static int | |
169 | test_stat (path, finfo) | |
170 | char *path; | |
171 | struct stat *finfo; | |
172 | { | |
173 | if (*path == '\0') | |
174 | { | |
175 | errno = ENOENT; | |
176 | return (-1); | |
177 | } | |
726f6388 JA |
178 | if (path[0] == '/' && path[1] == 'd' && strncmp (path, "/dev/fd/", 8) == 0) |
179 | { | |
ccc6cda3 | 180 | #if !defined (HAVE_DEV_FD) |
7117c2d2 | 181 | intmax_t fd; |
f73dda09 JA |
182 | int r; |
183 | ||
184 | if (legal_number (path + 8, &fd) && fd == (int)fd) | |
185 | { | |
186 | r = fstat ((int)fd, finfo); | |
187 | if (r == 0 || errno != EBADF) | |
188 | return (r); | |
189 | } | |
190 | errno = ENOENT; | |
191 | return (-1); | |
ccc6cda3 JA |
192 | #else |
193 | /* If HAVE_DEV_FD is defined, DEV_FD_PREFIX is defined also, and has a | |
194 | trailing slash. Make sure /dev/fd/xx really uses DEV_FD_PREFIX/xx. | |
195 | On most systems, with the notable exception of linux, this is | |
196 | effectively a no-op. */ | |
197 | char pbuf[32]; | |
198 | strcpy (pbuf, DEV_FD_PREFIX); | |
199 | strcat (pbuf, path + 8); | |
200 | return (stat (pbuf, finfo)); | |
726f6388 | 201 | #endif /* !HAVE_DEV_FD */ |
ccc6cda3 | 202 | } |
bb70624e JA |
203 | #if !defined (HAVE_DEV_STDIN) |
204 | else if (STREQN (path, "/dev/std", 8)) | |
205 | { | |
206 | if (STREQ (path+8, "in")) | |
207 | return (fstat (0, finfo)); | |
208 | else if (STREQ (path+8, "out")) | |
209 | return (fstat (1, finfo)); | |
210 | else if (STREQ (path+8, "err")) | |
211 | return (fstat (2, finfo)); | |
212 | else | |
213 | return (stat (path, finfo)); | |
214 | } | |
215 | #endif /* !HAVE_DEV_STDIN */ | |
726f6388 JA |
216 | return (stat (path, finfo)); |
217 | } | |
218 | ||
219 | /* Do the same thing access(2) does, but use the effective uid and gid, | |
220 | and don't make the mistake of telling root that any file is | |
221 | executable. */ | |
cce855bc | 222 | int |
ccc6cda3 | 223 | test_eaccess (path, mode) |
726f6388 JA |
224 | char *path; |
225 | int mode; | |
226 | { | |
227 | struct stat st; | |
726f6388 JA |
228 | |
229 | if (test_stat (path, &st) < 0) | |
230 | return (-1); | |
231 | ||
d166f048 | 232 | if (current_user.euid == 0) |
726f6388 JA |
233 | { |
234 | /* Root can read or write any file. */ | |
235 | if (mode != X_OK) | |
236 | return (0); | |
237 | ||
238 | /* Root can execute any file that has any one of the execute | |
239 | bits set. */ | |
240 | if (st.st_mode & S_IXUGO) | |
241 | return (0); | |
242 | } | |
243 | ||
28ef6c31 | 244 | if (st.st_uid == current_user.euid) /* owner */ |
726f6388 JA |
245 | mode <<= 6; |
246 | else if (group_member (st.st_gid)) | |
247 | mode <<= 3; | |
248 | ||
249 | if (st.st_mode & mode) | |
250 | return (0); | |
251 | ||
cce855bc | 252 | errno = EACCES; |
726f6388 JA |
253 | return (-1); |
254 | } | |
255 | ||
726f6388 JA |
256 | /* Increment our position in the argument list. Check that we're not |
257 | past the end of the argument list. This check is supressed if the | |
258 | argument is FALSE. Made a macro for efficiency. */ | |
726f6388 | 259 | #define advance(f) do { ++pos; if (f && pos >= argc) beyond (); } while (0) |
726f6388 JA |
260 | #define unary_advance() do { advance (1); ++pos; } while (0) |
261 | ||
262 | /* | |
cce855bc JA |
263 | * expr: |
264 | * or | |
726f6388 | 265 | */ |
cce855bc JA |
266 | static int |
267 | expr () | |
726f6388 | 268 | { |
cce855bc JA |
269 | if (pos >= argc) |
270 | beyond (); | |
271 | ||
272 | return (FALSE ^ or ()); /* Same with this. */ | |
726f6388 JA |
273 | } |
274 | ||
cce855bc JA |
275 | /* |
276 | * or: | |
277 | * and | |
278 | * and '-o' or | |
279 | */ | |
280 | static int | |
281 | or () | |
726f6388 | 282 | { |
cce855bc JA |
283 | int value, v2; |
284 | ||
285 | value = and (); | |
f73dda09 | 286 | if (pos < argc && argv[pos][0] == '-' && argv[pos][1] == 'o' && !argv[pos][2]) |
cce855bc JA |
287 | { |
288 | advance (0); | |
289 | v2 = or (); | |
290 | return (value || v2); | |
291 | } | |
292 | ||
293 | return (value); | |
294 | } | |
295 | ||
296 | /* | |
297 | * and: | |
298 | * term | |
299 | * term '-a' and | |
300 | */ | |
301 | static int | |
302 | and () | |
303 | { | |
304 | int value, v2; | |
305 | ||
306 | value = term (); | |
f73dda09 | 307 | if (pos < argc && argv[pos][0] == '-' && argv[pos][1] == 'a' && !argv[pos][2]) |
cce855bc JA |
308 | { |
309 | advance (0); | |
310 | v2 = and (); | |
311 | return (value && v2); | |
312 | } | |
313 | return (value); | |
726f6388 JA |
314 | } |
315 | ||
726f6388 JA |
316 | /* |
317 | * term - parse a term and return 1 or 0 depending on whether the term | |
318 | * evaluates to true or false, respectively. | |
319 | * | |
320 | * term ::= | |
cce855bc JA |
321 | * '-'('a'|'b'|'c'|'d'|'e'|'f'|'g'|'h'|'k'|'p'|'r'|'s'|'u'|'w'|'x') filename |
322 | * '-'('G'|'L'|'O'|'S'|'N') filename | |
ccc6cda3 | 323 | * '-t' [int] |
726f6388 | 324 | * '-'('z'|'n') string |
cce855bc | 325 | * '-o' option |
726f6388 | 326 | * string |
ccc6cda3 | 327 | * string ('!='|'='|'==') string |
726f6388 JA |
328 | * <int> '-'(eq|ne|le|lt|ge|gt) <int> |
329 | * file '-'(nt|ot|ef) file | |
330 | * '(' <expr> ')' | |
331 | * int ::= | |
726f6388 JA |
332 | * positive and negative integers |
333 | */ | |
334 | static int | |
335 | term () | |
336 | { | |
337 | int value; | |
338 | ||
339 | if (pos >= argc) | |
340 | beyond (); | |
341 | ||
ccc6cda3 JA |
342 | /* Deal with leading `not's. */ |
343 | if (argv[pos][0] == '!' && argv[pos][1] == '\0') | |
726f6388 | 344 | { |
ccc6cda3 JA |
345 | value = 0; |
346 | while (pos < argc && argv[pos][0] == '!' && argv[pos][1] == '\0') | |
726f6388 JA |
347 | { |
348 | advance (1); | |
ccc6cda3 | 349 | value = 1 - value; |
726f6388 JA |
350 | } |
351 | ||
ccc6cda3 | 352 | return (value ? !term() : term()); |
726f6388 JA |
353 | } |
354 | ||
ccc6cda3 | 355 | /* A paren-bracketed argument. */ |
b80f6443 | 356 | if (argv[pos][0] == '(' && argv[pos][1] == '\0') /* ) */ |
726f6388 JA |
357 | { |
358 | advance (1); | |
359 | value = expr (); | |
b80f6443 JA |
360 | if (argv[pos] == 0) /* ( */ |
361 | test_syntax_error (_("`)' expected"), (char *)NULL); | |
362 | else if (argv[pos][0] != ')' || argv[pos][1]) /* ( */ | |
363 | test_syntax_error (_("`)' expected, found %s"), argv[pos]); | |
726f6388 | 364 | advance (0); |
ccc6cda3 | 365 | return (value); |
726f6388 JA |
366 | } |
367 | ||
368 | /* are there enough arguments left that this could be dyadic? */ | |
cce855bc | 369 | if ((pos + 3 <= argc) && test_binop (argv[pos + 1])) |
726f6388 JA |
370 | value = binary_operator (); |
371 | ||
372 | /* Might be a switch type argument */ | |
ccc6cda3 | 373 | else if (argv[pos][0] == '-' && argv[pos][2] == '\0') |
726f6388 | 374 | { |
cce855bc | 375 | if (test_unop (argv[pos])) |
726f6388 JA |
376 | value = unary_operator (); |
377 | else | |
b80f6443 | 378 | test_syntax_error (_("%s: unary operator expected"), argv[pos]); |
726f6388 JA |
379 | } |
380 | else | |
381 | { | |
ccc6cda3 | 382 | value = argv[pos][0] != '\0'; |
726f6388 JA |
383 | advance (0); |
384 | } | |
385 | ||
386 | return (value); | |
387 | } | |
388 | ||
389 | static int | |
ccc6cda3 JA |
390 | filecomp (s, t, op) |
391 | char *s, *t; | |
392 | int op; | |
726f6388 | 393 | { |
ccc6cda3 | 394 | struct stat st1, st2; |
7117c2d2 | 395 | int r1, r2; |
726f6388 | 396 | |
7117c2d2 | 397 | if ((r1 = test_stat (s, &st1)) < 0) |
28ef6c31 | 398 | { |
28ef6c31 JA |
399 | if (op == EF) |
400 | return (FALSE); | |
401 | } | |
7117c2d2 | 402 | if ((r2 = test_stat (t, &st2)) < 0) |
28ef6c31 | 403 | { |
28ef6c31 JA |
404 | if (op == EF) |
405 | return (FALSE); | |
406 | } | |
407 | ||
ccc6cda3 | 408 | switch (op) |
726f6388 | 409 | { |
7117c2d2 JA |
410 | case OT: return (r1 < r2 || (r2 == 0 && st1.st_mtime < st2.st_mtime)); |
411 | case NT: return (r1 > r2 || (r1 == 0 && st1.st_mtime > st2.st_mtime)); | |
ccc6cda3 JA |
412 | case EF: return ((st1.st_dev == st2.st_dev) && (st1.st_ino == st2.st_ino)); |
413 | } | |
414 | return (FALSE); | |
415 | } | |
726f6388 | 416 | |
ccc6cda3 | 417 | static int |
cce855bc | 418 | arithcomp (s, t, op, flags) |
ccc6cda3 | 419 | char *s, *t; |
cce855bc | 420 | int op, flags; |
ccc6cda3 | 421 | { |
7117c2d2 | 422 | intmax_t l, r; |
cce855bc JA |
423 | int expok; |
424 | ||
425 | if (flags & TEST_ARITHEXP) | |
426 | { | |
427 | l = evalexp (s, &expok); | |
428 | if (expok == 0) | |
429 | return (FALSE); /* should probably longjmp here */ | |
430 | r = evalexp (t, &expok); | |
431 | if (expok == 0) | |
432 | return (FALSE); /* ditto */ | |
433 | } | |
434 | else | |
435 | { | |
436 | if (legal_number (s, &l) == 0) | |
437 | integer_expected_error (s); | |
438 | if (legal_number (t, &r) == 0) | |
439 | integer_expected_error (t); | |
440 | } | |
726f6388 | 441 | |
ccc6cda3 JA |
442 | switch (op) |
443 | { | |
444 | case EQ: return (l == r); | |
445 | case NE: return (l != r); | |
446 | case LT: return (l < r); | |
447 | case GT: return (l > r); | |
448 | case LE: return (l <= r); | |
449 | case GE: return (l >= r); | |
726f6388 | 450 | } |
cce855bc | 451 | |
ccc6cda3 JA |
452 | return (FALSE); |
453 | } | |
454 | ||
ccc6cda3 JA |
455 | static int |
456 | patcomp (string, pat, op) | |
457 | char *string, *pat; | |
458 | int op; | |
459 | { | |
460 | int m; | |
461 | ||
f73dda09 | 462 | m = strmatch (pat, string, FNMATCH_EXTFLAG); |
cce855bc JA |
463 | return ((op == EQ) ? (m == 0) : (m != 0)); |
464 | } | |
465 | ||
466 | int | |
467 | binary_test (op, arg1, arg2, flags) | |
468 | char *op, *arg1, *arg2; | |
469 | int flags; | |
470 | { | |
471 | int patmatch; | |
472 | ||
473 | patmatch = (flags & TEST_PATMATCH); | |
474 | ||
475 | if (op[0] == '=' && (op[1] == '\0' || (op[1] == '=' && op[2] == '\0'))) | |
476 | return (patmatch ? patcomp (arg1, arg2, EQ) : STREQ (arg1, arg2)); | |
477 | ||
478 | else if ((op[0] == '>' || op[0] == '<') && op[1] == '\0') | |
479 | return ((op[0] == '>') ? (strcmp (arg1, arg2) > 0) : (strcmp (arg1, arg2) < 0)); | |
480 | ||
481 | else if (op[0] == '!' && op[1] == '=' && op[2] == '\0') | |
482 | return (patmatch ? patcomp (arg1, arg2, NE) : (STREQ (arg1, arg2) == 0)); | |
483 | ||
484 | else if (op[2] == 't') | |
485 | { | |
486 | switch (op[1]) | |
487 | { | |
28ef6c31 JA |
488 | case 'n': return (filecomp (arg1, arg2, NT)); /* -nt */ |
489 | case 'o': return (filecomp (arg1, arg2, OT)); /* -ot */ | |
cce855bc JA |
490 | case 'l': return (arithcomp (arg1, arg2, LT, flags)); /* -lt */ |
491 | case 'g': return (arithcomp (arg1, arg2, GT, flags)); /* -gt */ | |
492 | } | |
493 | } | |
494 | else if (op[1] == 'e') | |
726f6388 | 495 | { |
cce855bc JA |
496 | switch (op[2]) |
497 | { | |
498 | case 'f': return (filecomp (arg1, arg2, EF)); /* -ef */ | |
499 | case 'q': return (arithcomp (arg1, arg2, EQ, flags)); /* -eq */ | |
500 | } | |
501 | } | |
502 | else if (op[2] == 'e') | |
503 | { | |
504 | switch (op[1]) | |
505 | { | |
506 | case 'n': return (arithcomp (arg1, arg2, NE, flags)); /* -ne */ | |
507 | case 'g': return (arithcomp (arg1, arg2, GE, flags)); /* -ge */ | |
508 | case 'l': return (arithcomp (arg1, arg2, LE, flags)); /* -le */ | |
509 | } | |
726f6388 | 510 | } |
cce855bc JA |
511 | |
512 | return (FALSE); /* should never get here */ | |
ccc6cda3 | 513 | } |
cce855bc | 514 | |
726f6388 | 515 | |
ccc6cda3 JA |
516 | static int |
517 | binary_operator () | |
518 | { | |
519 | int value; | |
520 | char *w; | |
521 | ||
522 | w = argv[pos + 1]; | |
cce855bc JA |
523 | if ((w[0] == '=' && (w[1] == '\0' || (w[1] == '=' && w[2] == '\0'))) || /* =, == */ |
524 | ((w[0] == '>' || w[0] == '<') && w[1] == '\0') || /* <, > */ | |
525 | (w[0] == '!' && w[1] == '=' && w[2] == '\0')) /* != */ | |
726f6388 | 526 | { |
cce855bc | 527 | value = binary_test (w, argv[pos], argv[pos + 2], 0); |
ccc6cda3 JA |
528 | pos += 3; |
529 | return (value); | |
530 | } | |
cce855bc | 531 | |
ccc6cda3 JA |
532 | #if defined (PATTERN_MATCHING) |
533 | if ((w[0] == '=' || w[0] == '!') && w[1] == '~' && w[2] == '\0') | |
534 | { | |
535 | value = patcomp (argv[pos], argv[pos + 2], w[0] == '=' ? EQ : NE); | |
536 | pos += 3; | |
537 | return (value); | |
538 | } | |
539 | #endif | |
ccc6cda3 | 540 | |
cce855bc | 541 | if ((w[0] != '-' || w[3] != '\0') || test_binop (w) == 0) |
ccc6cda3 | 542 | { |
b80f6443 | 543 | test_syntax_error (_("%s: binary operator expected"), w); |
ccc6cda3 JA |
544 | /* NOTREACHED */ |
545 | return (FALSE); | |
726f6388 | 546 | } |
726f6388 | 547 | |
cce855bc | 548 | value = binary_test (w, argv[pos], argv[pos + 2], 0); |
ccc6cda3 JA |
549 | pos += 3; |
550 | return value; | |
726f6388 JA |
551 | } |
552 | ||
553 | static int | |
554 | unary_operator () | |
555 | { | |
f73dda09 | 556 | char *op; |
7117c2d2 | 557 | intmax_t r; |
726f6388 | 558 | |
cce855bc JA |
559 | op = argv[pos]; |
560 | if (test_unop (op) == 0) | |
561 | return (FALSE); | |
562 | ||
563 | /* the only tricky case is `-t', which may or may not take an argument. */ | |
564 | if (op[1] == 't') | |
726f6388 | 565 | { |
cce855bc | 566 | advance (0); |
28ef6c31 | 567 | if (pos < argc) |
cce855bc | 568 | { |
28ef6c31 JA |
569 | if (legal_number (argv[pos], &r)) |
570 | { | |
571 | advance (0); | |
572 | return (unary_test (op, argv[pos - 1])); | |
573 | } | |
574 | else | |
575 | return (FALSE); | |
cce855bc JA |
576 | } |
577 | else | |
578 | return (unary_test (op, "1")); | |
579 | } | |
726f6388 | 580 | |
cce855bc JA |
581 | /* All of the unary operators take an argument, so we first call |
582 | unary_advance (), which checks to make sure that there is an | |
583 | argument, and then advances pos right past it. This means that | |
584 | pos - 1 is the location of the argument. */ | |
585 | unary_advance (); | |
586 | return (unary_test (op, argv[pos - 1])); | |
587 | } | |
726f6388 | 588 | |
cce855bc JA |
589 | int |
590 | unary_test (op, arg) | |
591 | char *op, *arg; | |
592 | { | |
7117c2d2 | 593 | intmax_t r; |
cce855bc JA |
594 | struct stat stat_buf; |
595 | ||
596 | switch (op[1]) | |
597 | { | |
726f6388 JA |
598 | case 'a': /* file exists in the file system? */ |
599 | case 'e': | |
cce855bc | 600 | return (test_stat (arg, &stat_buf) == 0); |
726f6388 JA |
601 | |
602 | case 'r': /* file is readable? */ | |
cce855bc | 603 | return (EACCESS (arg, R_OK) == 0); |
726f6388 JA |
604 | |
605 | case 'w': /* File is writeable? */ | |
cce855bc | 606 | return (EACCESS (arg, W_OK) == 0); |
726f6388 JA |
607 | |
608 | case 'x': /* File is executable? */ | |
cce855bc | 609 | return (EACCESS (arg, X_OK) == 0); |
726f6388 JA |
610 | |
611 | case 'O': /* File is owned by you? */ | |
cce855bc | 612 | return (test_stat (arg, &stat_buf) == 0 && |
d166f048 | 613 | (uid_t) current_user.euid == (uid_t) stat_buf.st_uid); |
726f6388 JA |
614 | |
615 | case 'G': /* File is owned by your group? */ | |
cce855bc | 616 | return (test_stat (arg, &stat_buf) == 0 && |
d166f048 | 617 | (gid_t) current_user.egid == (gid_t) stat_buf.st_gid); |
726f6388 | 618 | |
cce855bc JA |
619 | case 'N': |
620 | return (test_stat (arg, &stat_buf) == 0 && | |
621 | stat_buf.st_atime <= stat_buf.st_mtime); | |
622 | ||
726f6388 | 623 | case 'f': /* File is a file? */ |
cce855bc | 624 | if (test_stat (arg, &stat_buf) < 0) |
726f6388 JA |
625 | return (FALSE); |
626 | ||
ccc6cda3 | 627 | /* -f is true if the given file exists and is a regular file. */ |
726f6388 | 628 | #if defined (S_IFMT) |
ccc6cda3 | 629 | return (S_ISREG (stat_buf.st_mode) || (stat_buf.st_mode & S_IFMT) == 0); |
726f6388 | 630 | #else |
ccc6cda3 | 631 | return (S_ISREG (stat_buf.st_mode)); |
726f6388 JA |
632 | #endif /* !S_IFMT */ |
633 | ||
634 | case 'd': /* File is a directory? */ | |
cce855bc | 635 | return (test_stat (arg, &stat_buf) == 0 && (S_ISDIR (stat_buf.st_mode))); |
726f6388 JA |
636 | |
637 | case 's': /* File has something in it? */ | |
cce855bc | 638 | return (test_stat (arg, &stat_buf) == 0 && stat_buf.st_size > (off_t) 0); |
726f6388 JA |
639 | |
640 | case 'S': /* File is a socket? */ | |
641 | #if !defined (S_ISSOCK) | |
642 | return (FALSE); | |
643 | #else | |
cce855bc | 644 | return (test_stat (arg, &stat_buf) == 0 && S_ISSOCK (stat_buf.st_mode)); |
ccc6cda3 | 645 | #endif /* S_ISSOCK */ |
726f6388 JA |
646 | |
647 | case 'c': /* File is character special? */ | |
cce855bc | 648 | return (test_stat (arg, &stat_buf) == 0 && S_ISCHR (stat_buf.st_mode)); |
726f6388 JA |
649 | |
650 | case 'b': /* File is block special? */ | |
cce855bc | 651 | return (test_stat (arg, &stat_buf) == 0 && S_ISBLK (stat_buf.st_mode)); |
726f6388 JA |
652 | |
653 | case 'p': /* File is a named pipe? */ | |
726f6388 JA |
654 | #ifndef S_ISFIFO |
655 | return (FALSE); | |
656 | #else | |
cce855bc | 657 | return (test_stat (arg, &stat_buf) == 0 && S_ISFIFO (stat_buf.st_mode)); |
ccc6cda3 | 658 | #endif /* S_ISFIFO */ |
726f6388 JA |
659 | |
660 | case 'L': /* Same as -h */ | |
726f6388 | 661 | case 'h': /* File is a symbolic link? */ |
ccc6cda3 | 662 | #if !defined (S_ISLNK) || !defined (HAVE_LSTAT) |
726f6388 JA |
663 | return (FALSE); |
664 | #else | |
cce855bc JA |
665 | return ((arg[0] != '\0') && |
666 | (lstat (arg, &stat_buf) == 0) && S_ISLNK (stat_buf.st_mode)); | |
ccc6cda3 | 667 | #endif /* S_IFLNK && HAVE_LSTAT */ |
726f6388 JA |
668 | |
669 | case 'u': /* File is setuid? */ | |
cce855bc | 670 | return (test_stat (arg, &stat_buf) == 0 && (stat_buf.st_mode & S_ISUID) != 0); |
726f6388 JA |
671 | |
672 | case 'g': /* File is setgid? */ | |
cce855bc | 673 | return (test_stat (arg, &stat_buf) == 0 && (stat_buf.st_mode & S_ISGID) != 0); |
726f6388 JA |
674 | |
675 | case 'k': /* File has sticky bit set? */ | |
726f6388 JA |
676 | #if !defined (S_ISVTX) |
677 | /* This is not Posix, and is not defined on some Posix systems. */ | |
678 | return (FALSE); | |
679 | #else | |
cce855bc | 680 | return (test_stat (arg, &stat_buf) == 0 && (stat_buf.st_mode & S_ISVTX) != 0); |
726f6388 JA |
681 | #endif |
682 | ||
cce855bc JA |
683 | case 't': /* File fd is a terminal? */ |
684 | if (legal_number (arg, &r) == 0) | |
685 | return (FALSE); | |
f73dda09 | 686 | return ((r == (int)r) && isatty ((int)r)); |
726f6388 JA |
687 | |
688 | case 'n': /* True if arg has some length. */ | |
cce855bc | 689 | return (arg[0] != '\0'); |
726f6388 JA |
690 | |
691 | case 'z': /* True if arg has no length. */ | |
cce855bc | 692 | return (arg[0] == '\0'); |
726f6388 | 693 | |
cce855bc JA |
694 | case 'o': /* True if option `arg' is set. */ |
695 | return (minus_o_option_value (arg) == 1); | |
726f6388 | 696 | } |
f73dda09 JA |
697 | |
698 | /* We can't actually get here, but this shuts up gcc. */ | |
699 | return (FALSE); | |
726f6388 JA |
700 | } |
701 | ||
cce855bc JA |
702 | /* Return TRUE if OP is one of the test command's binary operators. */ |
703 | int | |
704 | test_binop (op) | |
705 | char *op; | |
726f6388 | 706 | { |
cce855bc | 707 | if (op[0] == '=' && op[1] == '\0') |
ccc6cda3 | 708 | return (1); /* '=' */ |
cce855bc | 709 | else if ((op[0] == '<' || op[0] == '>') && op[1] == '\0') /* string <, > */ |
ccc6cda3 | 710 | return (1); |
cce855bc | 711 | else if ((op[0] == '=' || op[0] == '!') && op[1] == '=' && op[2] == '\0') |
ccc6cda3 JA |
712 | return (1); /* `==' and `!=' */ |
713 | #if defined (PATTERN_MATCHING) | |
cce855bc | 714 | else if (op[2] == '\0' && op[1] == '~' && (op[0] == '=' || op[0] == '!')) |
ccc6cda3 JA |
715 | return (1); |
716 | #endif | |
cce855bc | 717 | else if (op[0] != '-' || op[2] == '\0' || op[3] != '\0') |
ccc6cda3 JA |
718 | return (0); |
719 | else | |
720 | { | |
cce855bc JA |
721 | if (op[2] == 't') |
722 | switch (op[1]) | |
ccc6cda3 | 723 | { |
cce855bc JA |
724 | case 'n': /* -nt */ |
725 | case 'o': /* -ot */ | |
726 | case 'l': /* -lt */ | |
727 | case 'g': /* -gt */ | |
728 | return (1); | |
729 | default: | |
730 | return (0); | |
ccc6cda3 | 731 | } |
cce855bc JA |
732 | else if (op[1] == 'e') |
733 | switch (op[2]) | |
ccc6cda3 | 734 | { |
cce855bc JA |
735 | case 'q': /* -eq */ |
736 | case 'f': /* -ef */ | |
737 | return (1); | |
738 | default: | |
739 | return (0); | |
ccc6cda3 | 740 | } |
cce855bc JA |
741 | else if (op[2] == 'e') |
742 | switch (op[1]) | |
ccc6cda3 | 743 | { |
cce855bc JA |
744 | case 'n': /* -ne */ |
745 | case 'g': /* -ge */ | |
746 | case 'l': /* -le */ | |
747 | return (1); | |
748 | default: | |
749 | return (0); | |
ccc6cda3 JA |
750 | } |
751 | else | |
28ef6c31 | 752 | return (0); |
ccc6cda3 | 753 | } |
726f6388 JA |
754 | } |
755 | ||
756 | /* Return non-zero if OP is one of the test command's unary operators. */ | |
cce855bc JA |
757 | int |
758 | test_unop (op) | |
759 | char *op; | |
726f6388 | 760 | { |
cce855bc JA |
761 | if (op[0] != '-') |
762 | return (0); | |
763 | ||
764 | switch (op[1]) | |
ccc6cda3 JA |
765 | { |
766 | case 'a': case 'b': case 'c': case 'd': case 'e': | |
767 | case 'f': case 'g': case 'h': case 'k': case 'n': | |
cce855bc JA |
768 | case 'o': case 'p': case 'r': case 's': case 't': |
769 | case 'u': case 'w': case 'x': case 'z': | |
770 | case 'G': case 'L': case 'O': case 'S': case 'N': | |
ccc6cda3 JA |
771 | return (1); |
772 | } | |
cce855bc | 773 | |
ccc6cda3 | 774 | return (0); |
726f6388 JA |
775 | } |
776 | ||
777 | static int | |
778 | two_arguments () | |
779 | { | |
ccc6cda3 JA |
780 | if (argv[pos][0] == '!' && argv[pos][1] == '\0') |
781 | return (argv[pos + 1][0] == '\0'); | |
782 | else if (argv[pos][0] == '-' && argv[pos][2] == '\0') | |
726f6388 | 783 | { |
cce855bc | 784 | if (test_unop (argv[pos])) |
ccc6cda3 | 785 | return (unary_operator ()); |
726f6388 | 786 | else |
b80f6443 | 787 | test_syntax_error (_("%s: unary operator expected"), argv[pos]); |
726f6388 JA |
788 | } |
789 | else | |
b80f6443 | 790 | test_syntax_error (_("%s: unary operator expected"), argv[pos]); |
726f6388 | 791 | |
ccc6cda3 | 792 | return (0); |
726f6388 JA |
793 | } |
794 | ||
ccc6cda3 JA |
795 | #define ANDOR(s) (s[0] == '-' && !s[2] && (s[1] == 'a' || s[1] == 'o')) |
796 | ||
f73dda09 JA |
797 | /* This could be augmented to handle `-t' as equivalent to `-t 1', but |
798 | POSIX requires that `-t' be given an argument. */ | |
ccc6cda3 JA |
799 | #define ONE_ARG_TEST(s) ((s)[0] != '\0') |
800 | ||
726f6388 JA |
801 | static int |
802 | three_arguments () | |
803 | { | |
804 | int value; | |
805 | ||
cce855bc | 806 | if (test_binop (argv[pos+1])) |
ccc6cda3 JA |
807 | { |
808 | value = binary_operator (); | |
809 | pos = argc; | |
810 | } | |
811 | else if (ANDOR (argv[pos+1])) | |
812 | { | |
813 | if (argv[pos+1][1] == 'a') | |
28ef6c31 | 814 | value = ONE_ARG_TEST(argv[pos]) && ONE_ARG_TEST(argv[pos+2]); |
ccc6cda3 | 815 | else |
28ef6c31 | 816 | value = ONE_ARG_TEST(argv[pos]) || ONE_ARG_TEST(argv[pos+2]); |
ccc6cda3 JA |
817 | pos = argc; |
818 | } | |
cce855bc | 819 | else if (argv[pos][0] == '!' && argv[pos][1] == '\0') |
726f6388 JA |
820 | { |
821 | advance (1); | |
822 | value = !two_arguments (); | |
823 | } | |
ccc6cda3 | 824 | else if (argv[pos][0] == '(' && argv[pos+2][0] == ')') |
726f6388 | 825 | { |
ccc6cda3 | 826 | value = ONE_ARG_TEST(argv[pos+1]); |
726f6388 JA |
827 | pos = argc; |
828 | } | |
726f6388 | 829 | else |
b80f6443 | 830 | test_syntax_error (_("%s: binary operator expected"), argv[pos+1]); |
ccc6cda3 | 831 | |
726f6388 JA |
832 | return (value); |
833 | } | |
834 | ||
835 | /* This is an implementation of a Posix.2 proposal by David Korn. */ | |
836 | static int | |
837 | posixtest () | |
838 | { | |
839 | int value; | |
840 | ||
841 | switch (argc - 1) /* one extra passed in */ | |
842 | { | |
843 | case 0: | |
844 | value = FALSE; | |
845 | pos = argc; | |
846 | break; | |
847 | ||
848 | case 1: | |
ccc6cda3 | 849 | value = ONE_ARG_TEST(argv[1]); |
726f6388 JA |
850 | pos = argc; |
851 | break; | |
852 | ||
853 | case 2: | |
854 | value = two_arguments (); | |
855 | pos = argc; | |
856 | break; | |
857 | ||
858 | case 3: | |
859 | value = three_arguments (); | |
860 | break; | |
861 | ||
862 | case 4: | |
ccc6cda3 | 863 | if (argv[pos][0] == '!' && argv[pos][1] == '\0') |
726f6388 JA |
864 | { |
865 | advance (1); | |
866 | value = !three_arguments (); | |
867 | break; | |
868 | } | |
869 | /* FALLTHROUGH */ | |
726f6388 JA |
870 | default: |
871 | value = expr (); | |
872 | } | |
873 | ||
874 | return (value); | |
875 | } | |
876 | ||
877 | /* | |
878 | * [: | |
879 | * '[' expr ']' | |
880 | * test: | |
881 | * test expr | |
882 | */ | |
883 | int | |
d166f048 | 884 | test_command (margc, margv) |
726f6388 JA |
885 | int margc; |
886 | char **margv; | |
887 | { | |
888 | int value; | |
726f6388 JA |
889 | int code; |
890 | ||
f73dda09 JA |
891 | USE_VAR(margc); |
892 | ||
726f6388 JA |
893 | code = setjmp (test_exit_buf); |
894 | ||
895 | if (code) | |
896 | return (test_error_return); | |
726f6388 JA |
897 | |
898 | argv = margv; | |
899 | ||
ccc6cda3 | 900 | if (margv[0] && margv[0][0] == '[' && margv[0][1] == '\0') |
726f6388 JA |
901 | { |
902 | --margc; | |
903 | ||
726f6388 | 904 | if (margv[margc] && (margv[margc][0] != ']' || margv[margc][1])) |
b80f6443 | 905 | test_syntax_error (_("missing `]'"), (char *)NULL); |
28ef6c31 JA |
906 | |
907 | if (margc < 2) | |
908 | test_exit (SHELL_BOOLEAN (FALSE)); | |
726f6388 JA |
909 | } |
910 | ||
911 | argc = margc; | |
912 | pos = 1; | |
913 | ||
914 | if (pos >= argc) | |
915 | test_exit (SHELL_BOOLEAN (FALSE)); | |
916 | ||
917 | noeval = 0; | |
918 | value = posixtest (); | |
919 | ||
920 | if (pos != argc) | |
b80f6443 | 921 | test_syntax_error (_("too many arguments"), (char *)NULL); |
726f6388 JA |
922 | |
923 | test_exit (SHELL_BOOLEAN (value)); | |
924 | } |