1 /* $NetBSD: findcc.c,v 1.6 2011/09/04 20:30:06 joerg Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matthias Scheler. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #if HAVE_NBTOOL_CONFIG_H 33 #include "nbtool_config.h" 34 #endif 35 36 #include <sys/cdefs.h> 37 #if !defined(lint) 38 __COPYRIGHT("@(#) Copyright (c) 1999 The NetBSD Foundation, Inc.\ 39 All rights reserved."); 40 __RCSID("$NetBSD: findcc.c,v 1.6 2011/09/04 20:30:06 joerg Exp $"); 41 #endif /* not lint */ 42 43 #include <sys/param.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <unistd.h> 48 49 #include "findcc.h" 50 51 char * 52 findcc(const char *progname) 53 { 54 char *path, *dir, *next; 55 char buffer[MAXPATHLEN]; 56 57 if ((next = strchr(progname, ' ')) != NULL) { 58 *next = '\0'; 59 } 60 61 if (strchr(progname, '/') != NULL) 62 return access(progname, X_OK) ? NULL : strdup(progname); 63 64 if (((path = getenv("PATH")) == NULL) || 65 ((path = strdup(path)) == NULL)) 66 return NULL; 67 68 dir = path; 69 while (dir != NULL) { 70 if ((next = strchr(dir, ':')) != NULL) 71 *next++ = '\0'; 72 73 if (snprintf(buffer, sizeof(buffer), 74 "%s/%s", dir, progname) < (int)sizeof(buffer)) { 75 if (!access(buffer, X_OK)) { 76 free(path); 77 return strdup(buffer); 78 } 79 } 80 dir = next; 81 } 82 83 free(path); 84 return NULL; 85 } 86 87