sbase/readlink.c
stateless 7216a53a7e Remove unnecessary exit(1) in usage()
Signed-off-by: Christoph Lohmann <20h@r-36.net>
2013-06-19 19:58:19 +02:00

55 lines
782 B
C

/* See LICENSE file for copyright and license details. */
#include <unistd.h>
#include <errno.h>
#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "util.h"
static void
usage(void)
{
eprintf("usage: %s [-fn] file\n", argv0);
}
int
main(int argc, char *argv[])
{
char buf[PATH_MAX];
bool nflag = false;
bool fflag = false;
ARGBEGIN {
case 'f':
fflag = true;
break;
case 'n':
nflag = true;
break;
default:
usage();
} ARGEND;
if (argc != 1)
usage();
if (strlen(argv[0]) > PATH_MAX - 1)
exit(1);
if (fflag) {
if (realpath(argv[0], buf) == NULL)
exit(1);
} else {
if (readlink(argv[0], buf, sizeof(buf)) < 0)
exit(1);
}
printf("%s", buf);
if (!nflag)
putchar('\n');
return 0;
}