1 This file is test.def, from which is created test.c.
2 It implements the builtin "test" in Bash.
4 Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
6 This file is part of GNU Bash, the Bourne Again SHell.
8 Bash is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 Bash is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License along
19 with Bash; see the file COPYING. If not, write to the Free Software
20 Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
25 $FUNCTION test_builtin
26 $SHORT_DOC test [expr]
27 Exits with a status of 0 (trueness) or 1 (falseness) depending on
28 the evaluation of EXPR. Expressions may be unary or binary. Unary
29 expressions are often used to examine the status of a file. There
30 are string operators as well, and numeric comparison operators.
34 -a FILE True if file exists.
35 -b FILE True if file is block special.
36 -c FILE True if file is character special.
37 -d FILE True if file is a directory.
38 -e FILE True if file exists.
39 -f FILE True if file exists and is a regular file.
40 -g FILE True if file is set-group-id.
41 -h FILE True if file is a symbolic link.
42 -L FILE True if file is a symbolic link.
43 -k FILE True if file has its `sticky' bit set.
44 -p FILE True if file is a named pipe.
45 -r FILE True if file is readable by you.
46 -s FILE True if file exists and is not empty.
47 -S FILE True if file is a socket.
48 -t FD True if FD is opened on a terminal.
49 -u FILE True if the file is set-user-id.
50 -w FILE True if the file is writable by you.
51 -x FILE True if the file is executable by you.
52 -O FILE True if the file is effectively owned by you.
53 -G FILE True if the file is effectively owned by your group.
54 -N FILE True if the file has been modified since it was last read.
56 FILE1 -nt FILE2 True if file1 is newer than file2 (according to
59 FILE1 -ot FILE2 True if file1 is older than file2.
61 FILE1 -ef FILE2 True if file1 is a hard link to file2.
65 -z STRING True if string is empty.
68 STRING True if string is not empty.
71 True if the strings are equal.
73 True if the strings are not equal.
75 True if STRING1 sorts before STRING2 lexicographically.
77 True if STRING1 sorts after STRING2 lexicographically.
81 -o OPTION True if the shell option OPTION is enabled.
82 ! EXPR True if expr is false.
83 EXPR1 -a EXPR2 True if both expr1 AND expr2 are true.
84 EXPR1 -o EXPR2 True if either expr1 OR expr2 is true.
86 arg1 OP arg2 Arithmetic tests. OP is one of -eq, -ne,
87 -lt, -le, -gt, or -ge.
89 Arithmetic binary operators return true if ARG1 is equal, not-equal,
90 less-than, less-than-or-equal, greater-than, or greater-than-or-equal
96 $FUNCTION test_builtin
98 This is a synonym for the "test" builtin, but the last
99 argument must be a literal `]', to match the opening `['.
104 #if defined (HAVE_UNISTD_H)
106 # include <sys/types.h>
111 #include "../bashansi.h"
113 #include "../shell.h"
117 extern char *this_command_name;
119 /* TEST/[ builtin. */
127 /* We let Matthew Bradburn and Kevin Braunsdorf's code do the
128 actual test command. So turn the list of args into an array
129 of strings, since that is what their code wants. */
132 if (this_command_name[0] == '[' && !this_command_name[1])
134 builtin_error ("missing `]'");
135 return (EX_BADUSAGE);
138 return (EXECUTION_FAILURE);
141 argv = make_builtin_argv (list, &argc);
142 result = test_command (argc, argv);