72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
/* printenv -- minimal clone of BSD printenv(1).
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usage: printenv [varname]
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Chet Ramey
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chet@po.cwru.edu
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*/
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/* Copyright (C) 1997-2002 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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*/
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#if defined (HAVE_CONFIG_H)
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# include <config.h>
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#endif
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#include "bashansi.h"
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#include <stdio.h> /* puts */
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extern char **environ;
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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register char **envp, *eval;
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int len;
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argv++;
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argc--;
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/* printenv */
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if (argc == 0)
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{
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for (envp = environ; *envp; envp++)
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puts (*envp);
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exit (0);
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}
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/* printenv varname */
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len = strlen (*argv);
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for (envp = environ; *envp; envp++)
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{
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if (**argv == **envp && strncmp (*envp, *argv, len) == 0)
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{
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eval = *envp + len;
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/* If the environment variable doesn't have an `=', ignore it. */
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if (*eval == '=')
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{
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puts (eval + 1);
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exit (0);
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}
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}
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}
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exit (1);
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}
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