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dfdbf9be00
directory before the specified config file. This is implemented by opening DEFAULTS as stdin if it exists, and if so resetting stdin to the actual config file when DEFAULTS is fully parsed via yywrap(). In short, this lets us create DEFAULTS kernel configs in /sys/<arch>/conf that can enable certain options or devices by default and allow users to disable them via 'nooptions' or 'nodevice' rather than having to create kludge NO_FOO options. Requested by: scottl Reviewed by: scottl
508 lines
11 KiB
C
508 lines
11 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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* 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 <dirent.h>
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#include "y.tab.h"
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#include "config.h"
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#include "configvers.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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int debugging;
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int profiling;
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int found_defaults;
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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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static void cleanheaders(char *);
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struct hdr_list {
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char *h_name;
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struct hdr_list *h_next;
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} *htab;
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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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char xxx[MAXPATHLEN];
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while ((ch = getopt(argc, argv, "d:gpV")) != -1)
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switch (ch) {
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case 'V':
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printf("%d\n", CONFIGVERS);
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exit(0);
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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 '?':
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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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PREFIX = *argv;
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if (freopen("DEFAULTS", "r", stdin) != NULL) {
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found_defaults = 1;
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yyfile = "DEFAULTS";
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} else {
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if (freopen(PREFIX, "r", stdin) == NULL)
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err(2, "%s", PREFIX);
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yyfile = PREFIX;
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}
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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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STAILQ_INIT(&dtab);
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STAILQ_INIT(&fntab);
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SLIST_INIT(&cputype);
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STAILQ_INIT(&ftab);
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if (yyparse())
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exit(3);
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if (machinename == NULL) {
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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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if (*srcdir == '\0')
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(void)snprintf(xxx, sizeof(xxx), "../../include");
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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) unlink(path("machine"));
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(void) symlink(xxx, path("machine"));
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if (strcmp(machinename, machinearch) != 0) {
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/*
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* make symbolic links in compilation directory for
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* machinearch, if it is different than machinename.
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*/
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if (*srcdir == '\0')
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(void)snprintf(xxx, sizeof(xxx), "../../../%s/include",
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machinearch);
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else
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(void)snprintf(xxx, sizeof(xxx), "%s/%s/include",
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srcdir, machinearch);
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(void) unlink(path(machinearch));
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(void) symlink(xxx, path(machinearch));
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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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cleanheaders(p);
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printf("Kernel build directory is %s\n", p);
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printf("Don't forget to do ``make cleandepend; make depend''\n");
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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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if (realpath("../..", srcdir) == NULL)
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errx(2, "Unable to find root of 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 [-Vgp] [-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(const 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, "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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static void
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cleanheaders(char *p)
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{
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DIR *dirp;
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struct dirent *dp;
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struct file_list *fl;
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struct hdr_list *hl;
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int i;
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remember("y.tab.h");
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remember("setdefs.h");
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STAILQ_FOREACH(fl, &ftab, f_next)
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remember(fl->f_fn);
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/*
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* Scan the build directory and clean out stuff that looks like
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* it might have been a leftover NFOO header, etc.
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*/
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if ((dirp = opendir(p)) == NULL)
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err(EX_OSERR, "opendir %s", p);
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while ((dp = readdir(dirp)) != NULL) {
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i = dp->d_namlen - 2;
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/* Skip non-headers */
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if (dp->d_name[i] != '.' || dp->d_name[i + 1] != 'h')
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continue;
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/* Skip special stuff, eg: bus_if.h, but check opt_*.h */
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if (index(dp->d_name, '_') &&
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strncmp(dp->d_name, "opt_", 4) != 0)
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continue;
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/* Check if it is a target file */
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for (hl = htab; hl != NULL; hl = hl->h_next) {
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if (strcmp(dp->d_name, hl->h_name) == 0) {
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break;
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}
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}
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if (hl)
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continue;
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printf("Removing stale header: %s\n", dp->d_name);
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if (unlink(path(dp->d_name)) == -1)
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warn("unlink %s", dp->d_name);
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}
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(void)closedir(dirp);
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}
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void
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remember(const char *file)
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{
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char *s;
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struct hdr_list *hl;
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if ((s = strrchr(file, '/')) != NULL)
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s = ns(s + 1);
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else
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s = ns(file);
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if (index(s, '_') && strncmp(s, "opt_", 4) != 0) {
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free(s);
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return;
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}
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for (hl = htab; hl != NULL; hl = hl->h_next) {
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if (strcmp(s, hl->h_name) == 0) {
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free(s);
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return;
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}
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}
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hl = malloc(sizeof(*hl));
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bzero(hl, sizeof(*hl));
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hl->h_name = s;
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hl->h_next = htab;
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htab = hl;
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}
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