sbase/printenv.c

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/* See LICENSE file for copyright and license details. */
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#include <stdio.h>
#include <stdlib.h>
#include "util.h"
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extern char **environ;
static void
usage(void)
{
eprintf("usage: %s [var ...]\n", argv0);
}
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int
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main(int argc, char *argv[])
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{
char *var;
int ret = 0;
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ARGBEGIN {
default:
usage();
} ARGEND;
if (!argc) {
while (*environ)
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printf("%s\n", *environ++);
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} else {
for (; argc > 0; argc--, argv++) {
if ((var = getenv(*argv)))
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printf("%s\n", var);
else
ret = 1;
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}
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}
return ret;
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}