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 [variable...]\n", argv0);
}
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int
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main(int argc, char *argv[])
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{
char *var;
ARGBEGIN {
default:
usage();
} ARGEND;
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if(argc == 1) {
while(*environ)
printf("%s\n", *environ++);
return EXIT_SUCCESS;
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}
while(*++argv) {
if((var = getenv(*argv)))
printf("%s\n", var);
}
return EXIT_SUCCESS;
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}