1 This file is test.def, from which is created test.c.
2 It implements the builtin "test" in Bash.
4 Copyright (C) 1987-2010 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
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 Bash is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with Bash. If not, see <http://www.gnu.org/licenses/>.
24 $FUNCTION test_builtin
25 $SHORT_DOC test [expr]
26 Evaluate conditional expression.
28 Exits with a status of 0 (true) or 1 (false) depending on
29 the evaluation of EXPR. Expressions may be unary or binary. Unary
30 expressions are often used to examine the status of a file. There
31 are string operators and numeric comparison operators as well.
33 The behavior of test depends on the number of arguments. Read the
34 bash manual page for the complete specification.
38 -a FILE True if file exists.
39 -b FILE True if file is block special.
40 -c FILE True if file is character special.
41 -d FILE True if file is a directory.
42 -e FILE True if file exists.
43 -f FILE True if file exists and is a regular file.
44 -g FILE True if file is set-group-id.
45 -h FILE True if file is a symbolic link.
46 -L FILE True if file is a symbolic link.
47 -k FILE True if file has its `sticky' bit set.
48 -p FILE True if file is a named pipe.
49 -r FILE True if file is readable by you.
50 -s FILE True if file exists and is not empty.
51 -S FILE True if file is a socket.
52 -t FD True if FD is opened on a terminal.
53 -u FILE True if the file is set-user-id.
54 -w FILE True if the file is writable by you.
55 -x FILE True if the file is executable by you.
56 -O FILE True if the file is effectively owned by you.
57 -G FILE True if the file is effectively owned by your group.
58 -N FILE True if the file has been modified since it was last read.
60 FILE1 -nt FILE2 True if file1 is newer than file2 (according to
63 FILE1 -ot FILE2 True if file1 is older than file2.
65 FILE1 -ef FILE2 True if file1 is a hard link to file2.
69 -z STRING True if string is empty.
72 STRING True if string is not empty.
75 True if the strings are equal.
77 True if the strings are not equal.
79 True if STRING1 sorts before STRING2 lexicographically.
81 True if STRING1 sorts after STRING2 lexicographically.
85 -o OPTION True if the shell option OPTION is enabled.
86 -v VAR True if the shell variable VAR is set
87 -R VAR True if the shell variable VAR is set and is a name reference.
88 ! EXPR True if expr is false.
89 EXPR1 -a EXPR2 True if both expr1 AND expr2 are true.
90 EXPR1 -o EXPR2 True if either expr1 OR expr2 is true.
92 arg1 OP arg2 Arithmetic tests. OP is one of -eq, -ne,
93 -lt, -le, -gt, or -ge.
95 Arithmetic binary operators return true if ARG1 is equal, not-equal,
96 less-than, less-than-or-equal, greater-than, or greater-than-or-equal
100 Returns success if EXPR evaluates to true; fails if EXPR evaluates to
101 false or an invalid argument is given.
105 $DOCNAME test_bracket
106 $FUNCTION test_builtin
107 $SHORT_DOC [ arg... ]
108 Evaluate conditional expression.
110 This is a synonym for the "test" builtin, but the last argument must
111 be a literal `]', to match the opening `['.
116 #if defined (HAVE_UNISTD_H)
118 # include <sys/types.h>
123 #include "../bashansi.h"
124 #include "../bashintl.h"
126 #include "../shell.h"
130 extern char *this_command_name;
132 /* TEST/[ builtin. */
140 /* We let Matthew Bradburn and Kevin Braunsdorf's code do the
141 actual test command. So turn the list of args into an array
142 of strings, since that is what their code wants. */
145 if (this_command_name[0] == '[' && !this_command_name[1])
147 builtin_error (_("missing `]'"));
148 return (EX_BADUSAGE);
151 return (EXECUTION_FAILURE);
154 argv = make_builtin_argv (list, &argc);
155 result = test_command (argc, argv);