1 /* $OpenBSD: realpath.c,v 1.27 2019/07/05 05:04:26 deraadt Exp $ */ 2 /* 3 * Copyright (c) 2019 Bob Beck <beck@openbsd.org> 4 * Copyright (c) 2019 Theo de Raadt <deraadt@openbsd.org> 5 * 6 * Permission to use, copy, modify, and/or 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 ANY 13 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 15 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 16 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <errno.h> 20 #include <stdlib.h> 21 #include <string.h> 22 #include <unistd.h> 23 #include <limits.h> 24 #include <syslog.h> 25 #include <stdarg.h> 26 27 int __realpath(const char *pathname, char *resolved); 28 PROTO_NORMAL(__realpath); 29 30 /* 31 * wrapper for kernel __realpath 32 */ 33 34 char * 35 realpath(const char *path, char *resolved) 36 { 37 char rbuf[PATH_MAX]; 38 39 if (__realpath(path, rbuf) == -1) 40 return NULL; 41 if (resolved == NULL) 42 return (strdup(rbuf)); 43 strlcpy(resolved, rbuf, PATH_MAX); 44 return (resolved); 45 } 46