1 /* $OpenBSD: util.c,v 1.1 2014/01/18 02:47:27 jsing Exp $ */ 2 3 /* 4 * Copyright (c) 2014 Joel Sing <jsing@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/param.h> 20 #include <err.h> 21 #include <stdio.h> 22 #include <stdlib.h> 23 #include <string.h> 24 25 #include "installboot.h" 26 27 char * 28 fileprefix(const char *base, const char *path) 29 { 30 char *r, *s; 31 int n; 32 33 if ((s = malloc(PATH_MAX)) == NULL) 34 err(1, "malloc"); 35 n = snprintf(s, PATH_MAX, "%s/%s", base, path); 36 if (n < 1 || n >= PATH_MAX) 37 err(1, "snprintf"); 38 if ((r = realpath(s, NULL)) == NULL) 39 err(1, "realpath"); 40 free(s); 41 42 return r; 43 } 44