1 /* GNU test program (ksb and mjb) */
3 /* Modified to run with the GNU shell by bfox. */
5 /* Copyright (C) 1987-2005 Free Software Foundation, Inc.
7 This file is part of GNU Bash, the Bourne Again SHell.
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
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
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software Foundation,
21 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
23 /* Define TEST_STANDALONE to get the /bin/test version. Otherwise, you get
24 the shell builtin version. */
28 #include <sys/types.h>
30 #define TEST_STANDALONE 1
36 /* The official name of this program (e.g., no `g' prefix). */
38 # define PROGRAM_NAME "["
40 # define PROGRAM_NAME "test"
45 #include "euidaccess.h"
48 #include "stat-time.h"
49 #include "strnumcmp.h"
52 # include <sys/param.h>
57 /* Exit status for syntax errors, etc. */
58 enum { TEST_TRUE, TEST_FALSE, TEST_FAILURE };
60 #if defined TEST_STANDALONE
61 # define test_exit(val) exit (val)
63 static jmp_buf test_exit_buf;
64 static int test_error_return = 0;
65 # define test_exit(val) test_error_return = val, longjmp (test_exit_buf, 1)
66 #endif /* !TEST_STANDALONE */
68 static int pos; /* The offset of the current argument in ARGV. */
69 static int argc; /* The number of arguments present in ARGV. */
70 static char **argv; /* The argument list. */
72 static bool test_unop (char const *s);
73 static bool unary_operator (void);
74 static bool binary_operator (bool);
75 static bool two_arguments (void);
76 static bool three_arguments (void);
77 static bool posixtest (int);
79 static bool expr (void);
80 static bool term (void);
81 static bool and (void);
82 static bool or (void);
84 static void test_syntax_error (char const *format, char const *arg)
86 static void beyond (void) ATTRIBUTE_NORETURN;
89 test_syntax_error (char const *format, char const *arg)
91 fprintf (stderr, "%s: ", argv[0]);
92 fprintf (stderr, format, arg);
95 test_exit (TEST_FAILURE);
98 /* Increment our position in the argument list. Check that we're not
99 past the end of the argument list. This check is supressed if the
100 argument is false. */
107 if (f && pos >= argc)
119 * beyond - call when we're beyond the end of the argument list (an
125 test_syntax_error (_("missing argument after %s"), quote (argv[argc - 1]));
128 /* If the characters pointed to by STRING constitute a valid number,
129 return a pointer to the start of the number, skipping any blanks or
130 leading '+'. Otherwise, report an error and exit. */
132 find_int (char const *string)
135 char const *number_start;
137 for (p = string; isblank (to_uchar (*p)); p++)
155 while (isblank (to_uchar (*p)))
161 test_syntax_error (_("invalid integer %s"), quote (string));
164 /* Find the modification time of FILE, and stuff it into *MTIME.
165 Return true if successful. */
167 get_mtime (char const *filename, struct timespec *mtime)
170 bool ok = (stat (filename, &finfo) == 0);
172 static struct timespec const zero;
176 *mtime = get_stat_mtime (&finfo);
180 /* Return true if S is one of the test command's binary operators. */
182 binop (char const *s)
184 return ((STREQ (s, "=")) || (STREQ (s, "!=")) || (STREQ (s, "-nt")) ||
185 (STREQ (s, "-ot")) || (STREQ (s, "-ef")) || (STREQ (s, "-eq")) ||
186 (STREQ (s, "-ne")) || (STREQ (s, "-lt")) || (STREQ (s, "-le")) ||
187 (STREQ (s, "-gt")) || (STREQ (s, "-ge")));
191 * term - parse a term and return 1 or 0 depending on whether the term
192 * evaluates to true or false, respectively.
195 * '-'('h'|'d'|'f'|'r'|'s'|'w'|'c'|'b'|'p'|'u'|'g'|'k') filename
196 * '-'('L'|'x') filename
198 * '-'('z'|'n') string
200 * string ('!='|'=') string
201 * <int> '-'(eq|ne|le|lt|ge|gt) <int>
202 * file '-'(nt|ot|ef) file
206 * positive and negative integers
212 bool negated = false;
214 /* Deal with leading `not's. */
215 while (pos < argc && argv[pos][0] == '!' && argv[pos][1] == '\0')
224 /* A paren-bracketed argument. */
225 if (argv[pos][0] == '(' && argv[pos][1] == '\0')
232 pos + nargs < argc && ! STREQ (argv[pos + nargs], ")");
240 value = posixtest (nargs);
242 test_syntax_error (_("')' expected"), NULL);
244 if (argv[pos][0] != ')' || argv[pos][1])
245 test_syntax_error (_("')' expected, found %s"), argv[pos]);
249 /* Are there enough arguments left that this could be dyadic? */
250 else if (4 <= argc - pos && STREQ (argv[pos], "-l") && binop (argv[pos + 2]))
251 value = binary_operator (true);
252 else if (3 <= argc - pos && binop (argv[pos + 1]))
253 value = binary_operator (false);
255 /* It might be a switch type argument. */
256 else if (argv[pos][0] == '-' && argv[pos][1] && argv[pos][2] == '\0')
258 if (test_unop (argv[pos]))
259 value = unary_operator ();
261 test_syntax_error (_("%s: unary operator expected"), argv[pos]);
265 value = (argv[pos][0] != '\0');
269 return negated ^ value;
273 binary_operator (bool l_is_l)
276 struct stat stat_buf, stat_spare;
277 /* Is the right integer expression of the form '-l string'? */
284 if ((op < argc - 2) && STREQ (argv[op + 1], "-l"))
292 if (argv[op][0] == '-')
294 /* check for eq, nt, and stuff */
295 if ((((argv[op][1] == 'l' || argv[op][1] == 'g')
296 && (argv[op][2] == 'e' || argv[op][2] == 't'))
297 || (argv[op][1] == 'e' && argv[op][2] == 'q')
298 || (argv[op][1] == 'n' && argv[op][2] == 'e'))
301 char lbuf[INT_BUFSIZE_BOUND (uintmax_t)];
302 char rbuf[INT_BUFSIZE_BOUND (uintmax_t)];
303 char const *l = (l_is_l
304 ? umaxtostr (strlen (argv[op - 1]), lbuf)
305 : find_int (argv[op - 1]));
306 char const *r = (r_is_l
307 ? umaxtostr (strlen (argv[op + 2]), rbuf)
308 : find_int (argv[op + 1]));
309 int cmp = strintcmp (l, r);
310 bool xe_operator = (argv[op][2] == 'e');
312 return (argv[op][1] == 'l' ? cmp < xe_operator
313 : argv[op][1] == 'g' ? cmp > - xe_operator
314 : (cmp != 0) == xe_operator);
323 if (argv[op][2] == 't' && !argv[op][3])
325 /* nt - newer than */
326 struct timespec lt, rt;
330 test_syntax_error (_("-nt does not accept -l"), NULL);
331 le = get_mtime (argv[op - 1], <);
332 re = get_mtime (argv[op + 1], &rt);
333 return le && (!re || timespec_cmp (lt, rt) > 0);
338 if (argv[op][2] == 'f' && !argv[op][3])
340 /* ef - hard link? */
343 test_syntax_error (_("-ef does not accept -l"), NULL);
344 return (stat (argv[op - 1], &stat_buf) == 0
345 && stat (argv[op + 1], &stat_spare) == 0
346 && stat_buf.st_dev == stat_spare.st_dev
347 && stat_buf.st_ino == stat_spare.st_ino);
352 if ('t' == argv[op][2] && '\000' == argv[op][3])
354 /* ot - older than */
355 struct timespec lt, rt;
359 test_syntax_error (_("-ot does not accept -l"), NULL);
360 le = get_mtime (argv[op - 1], <);
361 re = get_mtime (argv[op + 1], &rt);
362 return re && (!le || timespec_cmp (lt, rt) < 0);
367 /* FIXME: is this dead code? */
368 test_syntax_error (_("unknown binary operator"), argv[op]);
371 if (argv[op][0] == '=' && !argv[op][1])
373 bool value = STREQ (argv[pos], argv[pos + 2]);
378 if (STREQ (argv[op], "!="))
380 bool value = !STREQ (argv[pos], argv[pos + 2]);
390 unary_operator (void)
392 struct stat stat_buf;
394 switch (argv[pos][1])
399 /* All of the following unary operators use unary_advance (), which
400 checks to make sure that there is an argument, and then advances
401 pos right past it. This means that pos - 1 is the location of the
404 case 'a': /* file exists in the file system? */
407 return stat (argv[pos - 1], &stat_buf) == 0;
409 case 'r': /* file is readable? */
411 return euidaccess (argv[pos - 1], R_OK) == 0;
413 case 'w': /* File is writable? */
415 return euidaccess (argv[pos - 1], W_OK) == 0;
417 case 'x': /* File is executable? */
419 return euidaccess (argv[pos - 1], X_OK) == 0;
421 case 'O': /* File is owned by you? */
423 return (stat (argv[pos - 1], &stat_buf) == 0
424 && (geteuid () == stat_buf.st_uid));
426 case 'G': /* File is owned by your group? */
428 return (stat (argv[pos - 1], &stat_buf) == 0
429 && (getegid () == stat_buf.st_gid));
431 case 'f': /* File is a file? */
433 /* Under POSIX, -f is true if the given file exists
434 and is a regular file. */
435 return (stat (argv[pos - 1], &stat_buf) == 0
436 && S_ISREG (stat_buf.st_mode));
438 case 'd': /* File is a directory? */
440 return (stat (argv[pos - 1], &stat_buf) == 0
441 && S_ISDIR (stat_buf.st_mode));
443 case 's': /* File has something in it? */
445 return (stat (argv[pos - 1], &stat_buf) == 0
446 && 0 < stat_buf.st_size);
448 case 'S': /* File is a socket? */
450 return (stat (argv[pos - 1], &stat_buf) == 0
451 && S_ISSOCK (stat_buf.st_mode));
453 case 'c': /* File is character special? */
455 return (stat (argv[pos - 1], &stat_buf) == 0
456 && S_ISCHR (stat_buf.st_mode));
458 case 'b': /* File is block special? */
460 return (stat (argv[pos - 1], &stat_buf) == 0
461 && S_ISBLK (stat_buf.st_mode));
463 case 'p': /* File is a named pipe? */
465 return (stat (argv[pos - 1], &stat_buf) == 0
466 && S_ISFIFO (stat_buf.st_mode));
468 case 'L': /* Same as -h */
471 case 'h': /* File is a symbolic link? */
473 return (lstat (argv[pos - 1], &stat_buf) == 0
474 && S_ISLNK (stat_buf.st_mode));
476 case 'u': /* File is setuid? */
478 return (stat (argv[pos - 1], &stat_buf) == 0
479 && (stat_buf.st_mode & S_ISUID));
481 case 'g': /* File is setgid? */
483 return (stat (argv[pos - 1], &stat_buf) == 0
484 && (stat_buf.st_mode & S_ISGID));
486 case 'k': /* File has sticky bit set? */
488 return (stat (argv[pos - 1], &stat_buf) == 0
489 && (stat_buf.st_mode & S_ISVTX));
491 case 't': /* File (fd) is a terminal? */
496 arg = find_int (argv[pos - 1]);
498 fd = strtol (arg, NULL, 10);
499 return (errno != ERANGE && 0 <= fd && fd <= INT_MAX && isatty (fd));
502 case 'n': /* True if arg has some length. */
504 return argv[pos - 1][0] != 0;
506 case 'z': /* True if arg has no length. */
508 return argv[pos - 1][0] == '\0';
525 if (! (pos < argc && STREQ (argv[pos], "-a")))
544 if (! (pos < argc && STREQ (argv[pos], "-o")))
560 return or (); /* Same with this. */
563 /* Return true if OP is one of the test command's unary operators. */
565 test_unop (char const *op)
572 case 'a': case 'b': case 'c': case 'd': case 'e':
573 case 'f': case 'g': case 'h': case 'k': case 'n':
574 case 'o': case 'p': case 'r': case 's': case 't':
575 case 'u': case 'w': case 'x': case 'z':
576 case 'G': case 'L': case 'O': case 'S': case 'N':
586 return argv[pos++][0] != '\0';
594 if (STREQ (argv[pos], "!"))
597 value = ! one_argument ();
599 else if (argv[pos][0] == '-'
600 && argv[pos][1] != '\0'
601 && argv[pos][2] == '\0')
603 if (test_unop (argv[pos]))
604 value = unary_operator ();
606 test_syntax_error (_("%s: unary operator expected"), argv[pos]);
614 three_arguments (void)
618 if (binop (argv[pos + 1]))
619 value = binary_operator (false);
620 else if (STREQ (argv[pos], "!"))
623 value = !two_arguments ();
625 else if (STREQ (argv[pos], "(") && STREQ (argv[pos + 2], ")"))
628 value = one_argument ();
631 else if (STREQ (argv[pos + 1], "-a") || STREQ (argv[pos + 1], "-o"))
634 test_syntax_error (_("%s: binary operator expected"), argv[pos+1]);
638 /* This is an implementation of a Posix.2 proposal by David Korn. */
640 posixtest (int nargs)
647 value = one_argument ();
651 value = two_arguments ();
655 value = three_arguments ();
659 if (STREQ (argv[pos], "!"))
662 value = !three_arguments ();
665 if (STREQ (argv[pos], "(") && STREQ (argv[pos + 3], ")"))
668 value = two_arguments ();
683 #if defined TEST_STANDALONE
684 # include "long-options.h"
689 if (status != EXIT_SUCCESS)
690 fprintf (stderr, _("Try `%s --help' for more information.\n"),
695 Usage: test EXPRESSION\n\
697 or: [ EXPRESSION ]\n\
702 Exit with the status determined by EXPRESSION.\n\
705 fputs (HELP_OPTION_DESCRIPTION, stdout);
706 fputs (VERSION_OPTION_DESCRIPTION, stdout);
709 An omitted EXPRESSION defaults to false. Otherwise,\n\
710 EXPRESSION is true or false and sets exit status. It is one of:\n\
714 ( EXPRESSION ) EXPRESSION is true\n\
715 ! EXPRESSION EXPRESSION is false\n\
716 EXPRESSION1 -a EXPRESSION2 both EXPRESSION1 and EXPRESSION2 are true\n\
717 EXPRESSION1 -o EXPRESSION2 either EXPRESSION1 or EXPRESSION2 is true\n\
721 -n STRING the length of STRING is nonzero\n\
722 STRING equivalent to -n STRING\n\
723 -z STRING the length of STRING is zero\n\
724 STRING1 = STRING2 the strings are equal\n\
725 STRING1 != STRING2 the strings are not equal\n\
729 INTEGER1 -eq INTEGER2 INTEGER1 is equal to INTEGER2\n\
730 INTEGER1 -ge INTEGER2 INTEGER1 is greater than or equal to INTEGER2\n\
731 INTEGER1 -gt INTEGER2 INTEGER1 is greater than INTEGER2\n\
732 INTEGER1 -le INTEGER2 INTEGER1 is less than or equal to INTEGER2\n\
733 INTEGER1 -lt INTEGER2 INTEGER1 is less than INTEGER2\n\
734 INTEGER1 -ne INTEGER2 INTEGER1 is not equal to INTEGER2\n\
738 FILE1 -ef FILE2 FILE1 and FILE2 have the same device and inode numbers\n\
739 FILE1 -nt FILE2 FILE1 is newer (modification date) than FILE2\n\
740 FILE1 -ot FILE2 FILE1 is older than FILE2\n\
744 -b FILE FILE exists and is block special\n\
745 -c FILE FILE exists and is character special\n\
746 -d FILE FILE exists and is a directory\n\
747 -e FILE FILE exists\n\
750 -f FILE FILE exists and is a regular file\n\
751 -g FILE FILE exists and is set-group-ID\n\
752 -G FILE FILE exists and is owned by the effective group ID\n\
753 -h FILE FILE exists and is a symbolic link (same as -L)\n\
754 -k FILE FILE exists and has its sticky bit set\n\
757 -L FILE FILE exists and is a symbolic link (same as -h)\n\
758 -O FILE FILE exists and is owned by the effective user ID\n\
759 -p FILE FILE exists and is a named pipe\n\
760 -r FILE FILE exists and read permission is granted\n\
761 -s FILE FILE exists and has a size greater than zero\n\
764 -S FILE FILE exists and is a socket\n\
765 -t FD file descriptor FD is opened on a terminal\n\
766 -u FILE FILE exists and its set-user-ID bit is set\n\
767 -w FILE FILE exists and write permission is granted\n\
768 -x FILE FILE exists and execute (or search) permission is granted\n\
772 Except for -h and -L, all FILE-related tests dereference symbolic links.\n\
773 Beware that parentheses need to be escaped (e.g., by backslashes) for shells.\n\
774 INTEGER may also be -l STRING, which evaluates to the length of STRING.\n\
776 printf (USAGE_BUILTIN_WARNING, _("test and/or ["));
777 printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
781 #endif /* TEST_STANDALONE */
783 #if !defined TEST_STANDALONE
784 # define main test_command
787 #define AUTHORS "Kevin Braunsdorf", "Matthew Bradburn"
796 main (int margc, char **margv)
800 #if !defined TEST_STANDALONE
803 code = setjmp (test_exit_buf);
806 return (test_error_return);
807 #else /* TEST_STANDALONE */
808 initialize_main (&margc, &margv);
809 program_name = margv[0];
810 setlocale (LC_ALL, "");
811 bindtextdomain (PACKAGE, LOCALEDIR);
812 textdomain (PACKAGE);
814 initialize_exit_failure (TEST_FAILURE);
815 atexit (close_stdout);
816 #endif /* TEST_STANDALONE */
822 /* Recognize --help or --version, but only when invoked in the
823 "[" form, and when the last argument is not "]". POSIX
824 allows "[ --help" and "[ --version" to have the usual GNU
825 behavior, but it requires "test --help" and "test --version"
826 to exit silently with status 0. */
827 if (margc < 2 || !STREQ (margv[margc - 1], "]"))
829 parse_long_options (margc, margv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
830 usage, AUTHORS, (char const *) NULL);
831 test_syntax_error (_("missing `]'"), NULL);
841 test_exit (TEST_FALSE);
843 value = posixtest (argc - 1);
846 test_syntax_error (_("extra argument %s"), quote (argv[pos]));
848 test_exit (value ? TEST_TRUE : TEST_FALSE);