6242ba6480
for your /usr/obj/path/to/my/files path to the kernel, then weird things happened. make buildkernel would fail because config was dumping core or generating bad file names (depending on the lenght of the path). While I was here, also use strlcpy, strlcat and snprintf (or asprintf) as necessary. Minor format policing for the snprintf calls as well.
446 lines
9.5 KiB
C
446 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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strlcpy(destdir, optarg, sizeof(destdir));
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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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strlcpy(destdir, CDIR, sizeof(destdir));
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strlcat(destdir, PREFIX, sizeof(destdir));
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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[MAXPATHLEN];
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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 = NULL;
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if (file)
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asprintf(&cp, "%s/%s", destdir, file);
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else
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cp = strdup(destdir);
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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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