2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)main.c 8.1 (Berkeley) 6/6/93
35 * $FreeBSD: src/usr.sbin/config/main.c,v 1.37.2.3 2001/06/13 00:25:53 cg Exp $
36 * $DragonFly: src/usr.sbin/config/main.c,v 1.17 2006/10/22 16:09:08 dillon Exp $
39 #include <sys/types.h>
43 #include <sys/param.h>
60 #define CDIR "../compile/"
63 char destdir[MAXPATHLEN];
64 char srcdir[MAXPATHLEN];
66 static int no_config_clobber = TRUE;
70 static void configfile(void);
71 static void get_srcdir(void);
72 static void usage(void);
75 * Config builds a set of files for building a UNIX
76 * system given a description of the desired system.
79 main(int argc, char *argv[])
85 char linksrc[64], linkdest[MAXPATHLEN];
86 static const char *emus[] = { "linux" };
88 while ((ch = getopt(argc, argv, "d:gprn")) != -1)
92 strlcpy(destdir, optarg, sizeof(destdir));
94 errx(2, "directory already set");
103 /* no_config_clobber is now true by default, no-op */
105 "*** Using obsolete config option '-n' ***\n");
108 no_config_clobber = FALSE;
120 if (freopen(PREFIX = *argv, "r", stdin) == NULL)
121 err(2, "%s", PREFIX);
123 if (*destdir != '\0') {
124 len = strlen(destdir);
125 while (len > 1 && destdir[len - 1] == '/')
126 destdir[--len] = '\0';
129 strlcpy(destdir, CDIR, sizeof(destdir));
130 strlcat(destdir, PREFIX, sizeof(destdir));
133 p = path((char *)NULL);
138 else if ((buf.st_mode & S_IFMT) != S_IFDIR) {
139 errx(2, "%s isn't a directory", p);
141 else if (!no_config_clobber) {
142 char tmp[strlen(p) + 8];
144 fprintf(stderr, "Removing old directory %s: ", p);
146 snprintf(tmp, sizeof(tmp), "rm -rf %s", p);
148 fprintf(stderr, "Failed!\n");
151 fprintf(stderr, "Done.\n");
159 if (machinename == NULL) {
160 printf("Specify machine type, e.g. ``machine i386''\n");
166 * "machine" points into arch/<MACHINE_ARCH>/include
169 snprintf(linkdest, sizeof(linkdest), "../../arch/%s/include",
172 snprintf(linkdest, sizeof(linkdest), "%s/arch/%s/include",
173 srcdir, machinename);
174 symlink(linkdest, path("machine"));
177 * "arch" points into <ARCH>
180 snprintf(linkdest, sizeof(linkdest), "../../arch/%s",
183 snprintf(linkdest, sizeof(linkdest), "%s/arch/%s",
184 srcdir, machinename);
185 symlink(linkdest, path("arch"));
188 * XXX check directory structure for architecture subdirectories and
189 * create the symlinks automatically XXX
192 snprintf(linkdest, sizeof(linkdest),
193 "../../../../../net/i4b/include/%s",
196 snprintf(linkdest, sizeof(linkdest), "%s/net/i4b/include/%s",
197 srcdir, machinename);
198 mkdir(path("net"), 0755);
199 mkdir(path("net/i4b"), 0755);
200 mkdir(path("net/i4b/include"), 0755);
201 symlink(linkdest, path("net/i4b/include/machine"));
203 for (i = 0; i < sizeof(emus) / sizeof(emus[0]); ++i) {
205 snprintf(linkdest, sizeof(linkdest),
206 "../../emulation/%s/%s",
207 emus[i], machinename);
209 snprintf(linkdest, sizeof(linkdest),
210 "%s/emulation/%s/%s",
211 srcdir, emus[i], machinename);
213 snprintf(linksrc, sizeof(linksrc), "arch_%s", emus[i]);
214 symlink(linkdest, path(linksrc));
217 options(); /* make options .h files */
218 makefile(); /* build Makefile */
219 headers(); /* make a lot of .h files */
220 configfile(); /* put config file into kernel*/
221 printf("Kernel build directory is %s\n", p);
227 * determine the root of the kernel source tree
228 * and save that in srcdir.
234 if (realpath("..", srcdir) == NULL)
235 errx(2, "Unable to find root of source tree");
242 fprintf(stderr, "usage: config [-gpr] [-d destdir] sysname\n");
248 * returns EOF on end of file
249 * NULL on end of line
250 * pointer to the word otherwise
255 static char line[80];
261 while ((ch = getc(fp)) != EOF)
262 if (ch != ' ' && ch != '\t')
280 while ((ch = getc(fp)) != EOF) {
294 * like get_word but will accept something in double or single quotes
295 * (to allow embedded spaces).
298 get_quoted_word(FILE *fp)
300 static char line[256];
306 while ((ch = getc(fp)) != EOF)
307 if (ch != ' ' && ch != '\t')
324 if (ch == '"' || ch == '\'') {
327 while ((ch = getc(fp)) != EOF) {
332 printf("config: missing quote reading `%s'\n",
340 while ((ch = getc(fp)) != EOF) {
355 * prepend the path to a filename
358 path(const char *file)
362 cp = malloc((size_t)(strlen(destdir) + (file ? strlen(file) : 0) + 2));
378 fi = fopen(PREFIX, "r");
380 err(2, "%s", PREFIX);
381 fo = fopen(p = path("config.c.new"), "w");
384 fprintf(fo, "#include \"opt_config.h\"\n");
385 fprintf(fo, "#ifdef INCLUDE_CONFIG_FILE \n");
386 fprintf(fo, "static const char config[] = \"\\\n");
387 fprintf(fo, "START CONFIG FILE %s\\n\\\n___", PREFIX);
388 while (EOF != (i = getc(fi))) {
390 fprintf(fo, "\\n\\\n___");
391 } else if (i == '\"') {
393 } else if (i == '\\') {
399 fprintf(fo, "\\n\\\nEND CONFIG FILE %s\\n\\\n", PREFIX);
400 fprintf(fo, "\";\n");
401 fprintf(fo, "\n#endif /* INCLUDE_CONFIG_FILE */\n");
404 moveifchanged(path("config.c.new"), path("config.c"));
409 * compare two files; rename if changed.
412 moveifchanged(const char *from_name, const char *to_name)
417 struct stat from_sb, to_sb;
422 if ((from_fd = open(from_name, O_RDONLY)) < 0)
423 err(EX_OSERR, "moveifchanged open(%s)", from_name);
425 if ((to_fd = open(to_name, O_RDONLY)) < 0)
428 if (!changed && fstat(from_fd, &from_sb) < 0)
429 err(EX_OSERR, "moveifchanged fstat(%s)", from_name);
431 if (!changed && fstat(to_fd, &to_sb) < 0)
432 err(EX_OSERR, "moveifchanged fstat(%s)", to_name);
434 if (!changed && from_sb.st_size != to_sb.st_size)
437 tsize = (size_t)from_sb.st_size;
440 p = mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd, (off_t)0);
442 #define MAP_FAILED ((caddr_t)-1)
445 err(EX_OSERR, "mmap %s", from_name);
446 q = mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd, (off_t)0);
448 err(EX_OSERR, "mmap %s", to_name);
450 changed = memcmp(p, q, tsize);
455 if (rename(from_name, to_name) < 0)
456 err(EX_OSERR, "rename(%s, %s)", from_name, to_name);
458 if (unlink(from_name) < 0)
459 err(EX_OSERR, "unlink(%s)", from_name);