89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
/* $NetBSD: findcc.c,v 1.10 2021/08/20 06:36:10 rillig Exp $ */
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matthias Scheler.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#if !defined(lint)
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__COPYRIGHT("@(#) Copyright (c) 1999 The NetBSD Foundation, Inc.\
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All rights reserved.");
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__RCSID("$NetBSD: findcc.c,v 1.10 2021/08/20 06:36:10 rillig Exp $");
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#endif /* not lint */
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#include <sys/param.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "findcc.h"
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char *
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findcc(const char *progname)
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{
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char *cc;
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const char *path, *dir;
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char buffer[MAXPATHLEN];
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size_t progname_len, dir_len;
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progname_len = strcspn(progname, " ");
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if (memchr(progname, '/', progname_len) != NULL) {
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if ((cc = strndup(progname, progname_len)) == NULL)
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return NULL;
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if (access(cc, X_OK) == 0)
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return cc;
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free(cc);
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return NULL;
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}
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if ((path = getenv("PATH")) == NULL)
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return NULL;
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for (dir = path; *dir != '\0'; ) {
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dir_len = strcspn(dir, ":");
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if ((size_t)snprintf(buffer, sizeof(buffer), "%.*s/%.*s",
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(int)dir_len, dir, (int)progname_len, progname)
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< sizeof(buffer)
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&& access(buffer, X_OK) == 0)
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return strdup(buffer);
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dir += dir_len;
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if (*dir == ':')
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dir++;
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}
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return NULL;
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}
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