100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
|
/*
|
||
|
|
* Copyright (c) 1987, 1993
|
||
|
|
* The Regents of the University of California. All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. All advertising materials mentioning features or use of this software
|
||
|
|
* must display the following acknowledgement:
|
||
|
|
* This product includes software developed by the University of
|
||
|
|
* California, Berkeley and its contributors.
|
||
|
|
* 4. Neither the name of the University nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef lint
|
||
|
|
static char copyright[] =
|
||
|
|
"@(#) Copyright (c) 1987, 1993\n\
|
||
|
|
The Regents of the University of California. All rights reserved.\n";
|
||
|
|
#endif /* not lint */
|
||
|
|
|
||
|
|
#ifndef lint
|
||
|
|
static char sccsid[] = "@(#)printenv.c 8.1 (Berkeley) 6/6/93";
|
||
|
|
#endif /* not lint */
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
void usage __P((void));
|
||
|
|
|
||
|
|
/*
|
||
|
|
* printenv
|
||
|
|
*
|
||
|
|
* Bill Joy, UCB
|
||
|
|
* February, 1979
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
main(argc, argv)
|
||
|
|
int argc;
|
||
|
|
char *argv[];
|
||
|
|
{
|
||
|
|
extern char **environ;
|
||
|
|
register char *cp, **ep;
|
||
|
|
register size_t len;
|
||
|
|
int ch;
|
||
|
|
|
||
|
|
while ((ch = getopt(argc, argv, "")) != EOF)
|
||
|
|
switch(ch) {
|
||
|
|
case '?':
|
||
|
|
default:
|
||
|
|
usage();
|
||
|
|
}
|
||
|
|
argc -= optind;
|
||
|
|
argv += optind;
|
||
|
|
|
||
|
|
if (argc == 0) {
|
||
|
|
for (ep = environ; *ep; ep++)
|
||
|
|
(void)printf("%s\n", *ep);
|
||
|
|
exit(0);
|
||
|
|
}
|
||
|
|
len = strlen(*argv);
|
||
|
|
for (ep = environ; *ep; ep++)
|
||
|
|
if (!memcmp(*ep, *argv, len)) {
|
||
|
|
cp = *ep + len;
|
||
|
|
if (!*cp || *cp == '=') {
|
||
|
|
(void)printf("%s\n", *cp ? cp + 1 : cp);
|
||
|
|
exit(0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
usage()
|
||
|
|
{
|
||
|
|
(void)fprintf(stderr, "usage: printenv [name]\n");
|
||
|
|
exit(1);
|
||
|
|
}
|