sbase/printenv.c
2014-11-16 13:17:06 +00:00

39 lines
519 B
C

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