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/* printenv -- minimal clone of BSD printenv(1).
usage: printenv [varname]
Chet Ramey
chet@po.cwru.edu
*/
/* Copyright (C) 1997-2002 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
Bash is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with Bash; see the file COPYING. If not, write to the Free Software
Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
extern char **environ;
int
main (argc, argv)
int argc;
char **argv;
{
register char **envp, *eval;
int len;
argv++;
argc--;
/* printenv */
if (argc == 0)
{
for (envp = environ; *envp; envp++)
puts (*envp);
exit(EXIT_SUCCESS);
}
/* printenv varname */
len = strlen (*argv);
for (envp = environ; *envp; envp++)
{
if (**argv == **envp && strncmp (*envp, *argv, len) == 0)
{
eval = *envp + len;
/* If the environment variable doesn't have an '=', ignore it. */
if (*eval == '=')
{
puts (eval + 1);
exit(EXIT_SUCCESS);
}
}
}
exit(EXIT_FAILURE);
}
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