160 lines
4.8 KiB
Modula-2
160 lines
4.8 KiB
Modula-2
This file is test.def, from which is created test.c.
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It implements the builtin "test" in Bash.
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Copyright (C) 1987-2015 Free Software Foundation, Inc.
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This file is part of GNU Bash, the Bourne Again SHell.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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$PRODUCES test.c
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$BUILTIN test
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$FUNCTION test_builtin
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$SHORT_DOC test [expr]
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Evaluate conditional expression.
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Exits with a status of 0 (true) or 1 (false) depending on
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the evaluation of EXPR. Expressions may be unary or binary. Unary
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expressions are often used to examine the status of a file. There
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are string operators and numeric comparison operators as well.
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The behavior of test depends on the number of arguments. Read the
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bash manual page for the complete specification.
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File operators:
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-a FILE True if file exists.
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-b FILE True if file is block special.
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-c FILE True if file is character special.
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-d FILE True if file is a directory.
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-e FILE True if file exists.
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-f FILE True if file exists and is a regular file.
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-g FILE True if file is set-group-id.
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-h FILE True if file is a symbolic link.
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-L FILE True if file is a symbolic link.
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-k FILE True if file has its `sticky' bit set.
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-p FILE True if file is a named pipe.
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-r FILE True if file is readable by you.
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-s FILE True if file exists and is not empty.
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-S FILE True if file is a socket.
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-t FD True if FD is opened on a terminal.
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-u FILE True if the file is set-user-id.
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-w FILE True if the file is writable by you.
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-x FILE True if the file is executable by you.
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-O FILE True if the file is effectively owned by you.
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-G FILE True if the file is effectively owned by your group.
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-N FILE True if the file has been modified since it was last read.
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FILE1 -nt FILE2 True if file1 is newer than file2 (according to
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modification date).
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FILE1 -ot FILE2 True if file1 is older than file2.
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FILE1 -ef FILE2 True if file1 is a hard link to file2.
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String operators:
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-z STRING True if string is empty.
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-n STRING
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STRING True if string is not empty.
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STRING1 = STRING2
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True if the strings are equal.
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STRING1 != STRING2
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True if the strings are not equal.
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STRING1 < STRING2
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True if STRING1 sorts before STRING2 lexicographically.
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STRING1 > STRING2
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True if STRING1 sorts after STRING2 lexicographically.
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Other operators:
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-o OPTION True if the shell option OPTION is enabled.
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-v VAR True if the shell variable VAR is set.
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-R VAR True if the shell variable VAR is set and is a name
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reference.
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! EXPR True if expr is false.
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EXPR1 -a EXPR2 True if both expr1 AND expr2 are true.
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EXPR1 -o EXPR2 True if either expr1 OR expr2 is true.
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arg1 OP arg2 Arithmetic tests. OP is one of -eq, -ne,
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-lt, -le, -gt, or -ge.
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Arithmetic binary operators return true if ARG1 is equal, not-equal,
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less-than, less-than-or-equal, greater-than, or greater-than-or-equal
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than ARG2.
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Exit Status:
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Returns success if EXPR evaluates to true; fails if EXPR evaluates to
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false or an invalid argument is given.
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$END
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$BUILTIN [
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$DOCNAME test_bracket
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$FUNCTION test_builtin
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$SHORT_DOC [ arg... ]
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Evaluate conditional expression.
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This is a synonym for the "test" builtin, but the last argument must
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be a literal `]', to match the opening `['.
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$END
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#include <config.h>
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#if defined (HAVE_UNISTD_H)
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# ifdef _MINIX
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# include <sys/types.h>
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# endif
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# include <unistd.h>
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#endif
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#include "../bashansi.h"
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#include "../bashintl.h"
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#include "../shell.h"
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#include "../test.h"
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#include "common.h"
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extern char *this_command_name;
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/* TEST/[ builtin. */
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int
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test_builtin (list)
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WORD_LIST *list;
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{
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char **argv;
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int argc, result;
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/* We let Matthew Bradburn and Kevin Braunsdorf's code do the
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actual test command. So turn the list of args into an array
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of strings, since that is what their code wants. */
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if (list == 0)
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{
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if (this_command_name[0] == '[' && !this_command_name[1])
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{
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builtin_error (_("missing `]'"));
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return (EX_BADUSAGE);
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}
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return (EXECUTION_FAILURE);
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}
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argv = make_builtin_argv (list, &argc);
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result = test_command (argc, argv);
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free ((char *)argv);
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return (result);
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}
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