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	readlink.c - sbase - suckless unix tools
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	---
	readlink.c (846B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <limits.h>
	3 #include <stdio.h>
	4 #include <stdlib.h>
	5 #include <string.h>
	6 #include <unistd.h>
	7
	8 #include "util.h"
	9
	10 static void
	11 usage(void)
	12 {
	13 eprintf("usage: %s [-fn] path\n", argv0);
	14 }
	15
	16 int
	17 main(int argc, char *argv[])
	18 {
	19 char buf[PATH_MAX];
	20 ssize_t n;
	21 int nflag = 0, fflag = 0;
	22
	23 ARGBEGIN {
	24 case 'f':
	25 fflag = ARGC();
	26 break;
	27 case 'n':
	28 nflag = 1;
	29 break;
	30 default:
	31 usage();
	32 } ARGEND
	33
	34 if (argc != 1)
	35 usage();
	36
	37 if (strlen(argv[0]) >= PATH_MAX)
	38 eprintf("path too long\n");
	39
	40 if (fflag) {
	41 if (!realpath(argv[0], buf))
	42 eprintf("realpath %s:", argv[0]);
	43 } else {
	44 if ((n = readlink(argv[0], buf, PATH_MAX - 1)) < 0)
	45 eprintf("readlink %s:", argv[0]);
	46 buf[n] = '\0';
	47 }
	48
	49 fputs(buf, stdout);
	50 if (!nflag)
	51 putchar('\n');
	52
	53 return fshut(stdout, "<stdout>");
	54 }