toaruos/apps/readlink.c

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/* vim: tabstop=4 shiftwidth=4 noexpandtab
* This file is part of ToaruOS and is released under the terms
* of the NCSA / University of Illinois License - see LICENSE.md
* Copyright (C) 2015 Mike Gerow
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define MAX_LINK_SIZE 4096
static char usage[] =
"Usage: %s LINK\n";
int main(int argc, char * argv[]) {
if (argc != 2) {
fprintf(stderr, usage, argv[0]);
exit(EXIT_FAILURE);
}
char * name = argv[1];
char buf[MAX_LINK_SIZE];
if (readlink(name, buf, sizeof(buf)) < 0) {
//perror("link");
exit(EXIT_FAILURE);
}
fprintf(stdout, "%s\n", buf);
exit(EXIT_SUCCESS);
}