448 lines
9.5 KiB
C
448 lines
9.5 KiB
C
/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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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 University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/file.h>
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <ctype.h>
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#include <err.h>
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#include <stdio.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include "y.tab.h"
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#include "config.h"
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#ifndef TRUE
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#define TRUE (1)
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#endif
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#ifndef FALSE
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#define FALSE (0)
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#endif
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#define CDIR "../../compile/"
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char * PREFIX;
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char destdir[MAXPATHLEN];
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char srcdir[MAXPATHLEN];
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static int no_config_clobber = TRUE;
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int debugging;
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int profiling;
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static void configfile(void);
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static void get_srcdir(void);
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static void usage(void);
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/*
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* Config builds a set of files for building a UNIX
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* system given a description of the desired system.
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*/
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int
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main(int argc, char **argv)
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{
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struct stat buf;
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int ch, len;
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char *p;
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while ((ch = getopt(argc, argv, "d:gprn")) != -1)
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switch (ch) {
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case 'd':
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if (*destdir == '\0')
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strcpy(destdir, optarg);
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else
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errx(2, "directory already set");
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break;
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case 'g':
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debugging++;
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break;
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case 'p':
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profiling++;
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break;
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case 'n':
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/* no_config_clobber is now true by default, no-op */
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fprintf(stderr,
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"*** Using obsolete config option '-n' ***\n");
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break;
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case 'r':
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no_config_clobber = FALSE;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc != 1)
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usage();
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if (freopen(PREFIX = *argv, "r", stdin) == NULL)
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err(2, "%s", PREFIX);
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if (*destdir != '\0') {
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len = strlen(destdir);
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while (len > 1 && destdir[len - 1] == '/')
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destdir[--len] = '\0';
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get_srcdir();
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} else {
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strcpy(destdir, CDIR);
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strcat(destdir, PREFIX);
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}
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p = path((char *)NULL);
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if (stat(p, &buf)) {
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if (mkdir(p, 0777))
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err(2, "%s", p);
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}
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else if ((buf.st_mode & S_IFMT) != S_IFDIR) {
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errx(2, "%s isn't a directory", p);
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}
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else if (!no_config_clobber) {
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char tmp[strlen(p) + 8];
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fprintf(stderr, "Removing old directory %s: ", p);
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fflush(stderr);
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snprintf(tmp, sizeof(tmp), "rm -rf %s", p);
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if (system(tmp)) {
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fprintf(stderr, "Failed!\n");
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err(2, "%s", tmp);
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}
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fprintf(stderr, "Done.\n");
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if (mkdir(p, 0777))
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err(2, "%s", p);
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}
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dtab = NULL;
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if (yyparse())
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exit(3);
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switch (machine) {
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case MACHINE_I386:
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case MACHINE_PC98:
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case MACHINE_ALPHA:
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case MACHINE_IA64:
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break;
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default:
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printf("Specify machine type, e.g. ``machine i386''\n");
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exit(1);
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}
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/*
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* make symbolic links in compilation directory
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* for "sys" (to make genassym.c work along with #include <sys/xxx>)
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* and similarly for "machine".
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*/
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{
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char xxx[80];
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if (*srcdir == '\0')
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(void)snprintf(xxx, sizeof(xxx), "../../%s/include",
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machinename);
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else
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(void)snprintf(xxx, sizeof(xxx), "%s/%s/include",
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srcdir, machinename);
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(void) symlink(xxx, path("machine"));
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}
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options(); /* make options .h files */
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makefile(); /* build Makefile */
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headers(); /* make a lot of .h files */
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configfile(); /* put config file into kernel*/
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printf("Kernel build directory is %s\n", p);
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exit(0);
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}
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/*
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* get_srcdir
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* determine the root of the kernel source tree
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* and save that in srcdir.
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*/
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static void
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get_srcdir(void)
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{
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int i;
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char *p;
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(void)getcwd(srcdir, sizeof(srcdir));
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for (i = 0; i < 2; i++) {
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p = strrchr(srcdir, '/');
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if (p != NULL)
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*p = '\0';
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}
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/* Sanity check */
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p = strrchr(srcdir, '/');
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if (p == NULL || strcmp(p + 1, "sys"))
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errx(2, "non-standard kernel source tree");
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: config [-gpr] [-d destdir] sysname\n");
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exit(1);
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}
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/*
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* get_word
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* returns EOF on end of file
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* NULL on end of line
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* pointer to the word otherwise
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*/
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char *
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get_word(FILE *fp)
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{
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static char line[80];
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int ch;
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char *cp;
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int escaped_nl = 0;
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begin:
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while ((ch = getc(fp)) != EOF)
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if (ch != ' ' && ch != '\t')
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break;
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if (ch == EOF)
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return ((char *)EOF);
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if (ch == '\\'){
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escaped_nl = 1;
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goto begin;
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}
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if (ch == '\n') {
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if (escaped_nl){
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escaped_nl = 0;
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goto begin;
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}
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else
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return (NULL);
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}
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cp = line;
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*cp++ = ch;
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while ((ch = getc(fp)) != EOF) {
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if (isspace(ch))
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break;
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*cp++ = ch;
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}
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*cp = 0;
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if (ch == EOF)
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return ((char *)EOF);
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(void) ungetc(ch, fp);
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return (line);
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}
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/*
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* get_quoted_word
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* like get_word but will accept something in double or single quotes
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* (to allow embedded spaces).
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*/
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char *
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get_quoted_word(FILE *fp)
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{
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static char line[256];
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int ch;
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char *cp;
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int escaped_nl = 0;
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begin:
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while ((ch = getc(fp)) != EOF)
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if (ch != ' ' && ch != '\t')
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break;
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if (ch == EOF)
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return ((char *)EOF);
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if (ch == '\\'){
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escaped_nl = 1;
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goto begin;
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}
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if (ch == '\n') {
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if (escaped_nl){
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escaped_nl = 0;
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goto begin;
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}
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else
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return (NULL);
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}
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cp = line;
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if (ch == '"' || ch == '\'') {
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int quote = ch;
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while ((ch = getc(fp)) != EOF) {
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if (ch == quote)
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break;
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if (ch == '\n') {
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*cp = 0;
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printf("config: missing quote reading `%s'\n",
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line);
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exit(2);
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}
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*cp++ = ch;
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}
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} else {
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*cp++ = ch;
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while ((ch = getc(fp)) != EOF) {
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if (isspace(ch))
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break;
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*cp++ = ch;
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}
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if (ch != EOF)
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(void) ungetc(ch, fp);
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}
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*cp = 0;
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if (ch == EOF)
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return ((char *)EOF);
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return (line);
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}
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/*
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* prepend the path to a filename
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*/
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char *
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path(char *file)
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{
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char *cp;
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cp = malloc((size_t)(strlen(destdir) + (file ? strlen(file) : 0) + 2));
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(void) strcpy(cp, destdir);
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if (file) {
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(void) strcat(cp, "/");
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(void) strcat(cp, file);
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}
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return (cp);
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}
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static void
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configfile(void)
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{
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FILE *fi, *fo;
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char *p;
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int i;
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fi = fopen(PREFIX, "r");
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if (!fi)
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err(2, "%s", PREFIX);
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fo = fopen(p=path("config.c.new"), "w");
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if (!fo)
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err(2, "%s", p);
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fprintf(fo, "#include \"opt_config.h\"\n");
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fprintf(fo, "#ifdef INCLUDE_CONFIG_FILE \n");
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fprintf(fo, "static const char config[] = \"\\\n");
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fprintf(fo, "START CONFIG FILE %s\\n\\\n___", PREFIX);
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while (EOF != (i=getc(fi))) {
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if (i == '\n') {
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fprintf(fo, "\\n\\\n___");
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} else if (i == '\"') {
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fprintf(fo, "\\\"");
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} else if (i == '\\') {
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fprintf(fo, "\\\\");
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} else {
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putc(i, fo);
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}
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}
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fprintf(fo, "\\n\\\nEND CONFIG FILE %s\\n\\\n", PREFIX);
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fprintf(fo, "\";\n");
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fprintf(fo, "\n#endif /* INCLUDE_CONFIG_FILE */\n");
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fclose(fi);
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fclose(fo);
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moveifchanged(path("config.c.new"), path("config.c"));
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}
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/*
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* moveifchanged --
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* compare two files; rename if changed.
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*/
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void
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moveifchanged(const char *from_name, const char *to_name)
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{
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char *p, *q;
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int changed;
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size_t tsize;
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struct stat from_sb, to_sb;
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int from_fd, to_fd;
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changed = 0;
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if ((from_fd = open(from_name, O_RDONLY)) < 0)
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err(EX_OSERR, "moveifchanged open(%s)", from_name);
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if ((to_fd = open(to_name, O_RDONLY)) < 0)
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changed++;
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if (!changed && fstat(from_fd, &from_sb) < 0)
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err(EX_OSERR, "moveifchanged fstat(%s)", from_name);
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if (!changed && fstat(to_fd, &to_sb) < 0)
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err(EX_OSERR, "moveifchanged fstat(%s)", to_name);
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if (!changed && from_sb.st_size != to_sb.st_size)
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changed++;
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tsize = (size_t)from_sb.st_size;
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if (!changed) {
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p = mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd, (off_t)0);
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#ifndef MAP_FAILED
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#define MAP_FAILED ((caddr_t) -1)
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#endif
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if (p == MAP_FAILED)
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err(EX_OSERR, "mmap %s", from_name);
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q = mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd, (off_t)0);
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if (q == MAP_FAILED)
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err(EX_OSERR, "mmap %s", to_name);
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changed = memcmp(p, q, tsize);
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munmap(p, tsize);
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munmap(q, tsize);
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}
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if (changed) {
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if (rename(from_name, to_name) < 0)
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err(EX_OSERR, "rename(%s, %s)", from_name, to_name);
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} else {
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if (unlink(from_name) < 0)
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err(EX_OSERR, "unlink(%s)", from_name);
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}
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}
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