sbase/printenv.c
2013-10-07 17:13:01 +01:00

38 lines
499 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;
ARGBEGIN {
default:
usage();
} ARGEND;
if(argc == 1) {
while(*environ)
printf("%s\n", *environ++);
return EXIT_SUCCESS;
}
while(*++argv) {
if((var = getenv(*argv)))
printf("%s\n", var);
}
return EXIT_SUCCESS;
}