New C program to replace old "mkdep" script. Speeds up "make depend"
by at least 5 percent.
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tron
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/* $NetBSD: mkdep.c,v 1.1.1.1 1999/01/25 22:10:42 tron 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1999 The NetBSD Foundation, Inc.\n\
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All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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__RCSID("$NetBSD: mkdep.c,v 1.1.1.1 1999/01/25 22:10:42 tron Exp $");
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/wait.h>
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#include <ctype.h>
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#include <err.h>
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#include <locale.h>
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#include <paths.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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#define DEFAULT_CC "cc"
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#define DEFAULT_PATH _PATH_DEFPATH
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#define DEFAULT_FILENAME ".depend"
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void usage __P((void));
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char *findcc __P((const char *));
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int main __P((int, char **));
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void
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usage()
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{
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(void)fprintf(stderr,
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"usage: mkdep [-a] [-p] [-f file ...] flags file ...\n");
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exit(EXIT_FAILURE);
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}
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char *
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findcc(progname)
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const char *progname;
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{
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char *path, *dir, *next;
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char buffer[MAXPATHLEN];
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if (strchr(progname, '/') != NULL)
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return access(progname, X_OK) ? NULL : strdup(progname);
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if (((path = getenv("PATH")) == NULL) ||
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((path = strdup(path)) == NULL))
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return NULL;
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dir = path;
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while (dir != NULL) {
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if ((next = strchr(dir, ':')) != NULL)
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*next++ = '\0';
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if (snprintf(buffer, sizeof(buffer),
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"%s/%s", dir, progname) < sizeof(buffer)) {
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if (!access(buffer, X_OK)) {
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free(path);
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return strdup(buffer);
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}
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}
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dir = next;
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}
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free(path);
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return NULL;
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}
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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int aflag, pflag, index, tmpfd, status;
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pid_t cpid, pid;
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char *filename, *CC, *pathname, tmpfilename[MAXPATHLEN], **args;
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FILE *tmpfile, *dependfile;
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char buffer[32768];
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setlocale(LC_ALL, "");
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aflag = 0;
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pflag = 0;
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filename = DEFAULT_FILENAME;
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for (index=1; index< argc; index++)
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if (strcmp(argv[index], "-a") == 0)
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aflag = 1;
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else
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if (strcmp(argv[index], "-f") == 0) {
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if (++index < argc)
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filename = argv[index];
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}
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else
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if (strcmp(argv[index], "-p") == 0)
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pflag = 1;
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else
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break;
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argc -= index;
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argv += index;
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if (argc == 0)
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usage();
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if ((CC = getenv("CC")) == NULL)
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CC = DEFAULT_CC;
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if ((pathname = findcc(CC)) == NULL)
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if (!setenv("PATH", DEFAULT_PATH, 1))
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pathname = findcc(CC);
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if (pathname == NULL) {
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(void)fprintf(stderr, "mkdep: %s: not found\n", CC);
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return EXIT_FAILURE;
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}
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if ((args = malloc((argc + 3) * sizeof(char *))) == NULL) {
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perror("mkdep");
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exit(EXIT_FAILURE);
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}
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args[0] = CC;
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args[1] = "-M";
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(void)memcpy(&args[2], argv, (argc + 1) * sizeof(char *));
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(void)strcpy(tmpfilename, _PATH_TMP "mkdepXXXXXX");
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if ((tmpfd = mkstemp (tmpfilename)) < 0) {
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warn("unable to create temporary file %s", tmpfilename);
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return EXIT_FAILURE;
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}
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#ifdef __GNUC__ /* to shut up gcc warnings */
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(void)&aflag;
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(void)&pflag;
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(void)&filename;
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(void)&pathname;
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#endif
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switch (cpid = vfork()) {
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case 0:
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(void)dup2(tmpfd, STDOUT_FILENO);
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(void)close(tmpfd);
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(void)execv(pathname, args);
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_exit(EXIT_FAILURE);
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case -1:
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(void)fputs("mkdep: unable to fork.\n", stderr);
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(void)close(tmpfd);
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(void)unlink(tmpfilename);
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return EXIT_FAILURE;
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}
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while (((pid = wait(&status)) != cpid) && (pid >= 0));
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if (status) {
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(void)fputs("mkdep: compile failed.\n", stderr);
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(void)close(tmpfd);
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(void)unlink(tmpfilename);
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return EXIT_FAILURE;
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}
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(void)lseek(tmpfd, 0, SEEK_SET);
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if ((tmpfile = fdopen(tmpfd, "r")) == NULL) {
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(void)fprintf(stderr,
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"mkdep: unable to read temporary file %s\n",
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tmpfilename);
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(void)close(tmpfd);
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(void)unlink(tmpfilename);
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return EXIT_FAILURE;
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}
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if ((dependfile = fopen(filename, aflag ? "a" : "w")) == NULL) {
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(void)fprintf(stderr,
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"mkdep: unable to %s to file %s\n",
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aflag ? "append" : "write", filename);
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(void)fclose(tmpfile);
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(void)unlink(tmpfilename);
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return EXIT_FAILURE;
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}
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while (fgets(buffer, sizeof(buffer), tmpfile) != NULL) {
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char *ptr;
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if (pflag && ((ptr = strstr(buffer, ".o")) != NULL)) {
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char *colon;
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colon = ptr + 2;
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while (isspace(*colon)) colon++;
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if (*colon == ':')
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(void)strcpy(ptr, colon);
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}
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ptr = buffer;
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while (*ptr)
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if (isspace(*ptr++))
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if ((ptr[0] == '.') && (ptr[1] == '/'))
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(void)strcpy(ptr, ptr + 2);
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(void)fputs(buffer, dependfile);
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}
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(void)fclose(dependfile);
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(void)fclose(tmpfile);
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(void)unlink(tmpfilename);
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return EXIT_SUCCESS;
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}
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