d99d951c1c
doesn't exist, we make a directory and then say "oops, that file isn't there" leaving the directory behind. Add a stat for the config file so that we detect this before making the directory. This is semi-lame, but less lame than having this bug.
714 lines
16 KiB
C
714 lines
16 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/sbuf.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 <assert.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 <string.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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int incignore;
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/*
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* Preserve old behaviour in INCLUDE_CONFIG_FILE handling (files are included
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* literally).
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*/
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int filebased = 0;
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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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static void kernconfdump(const 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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char *kernfile;
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kernfile = NULL;
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while ((ch = getopt(argc, argv, "Cd:gpVx:")) != -1)
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switch (ch) {
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case 'C':
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filebased = 1;
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break;
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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 'V':
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printf("%d\n", CONFIGVERS);
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exit(0);
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case 'x':
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kernfile = optarg;
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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 (kernfile != NULL) {
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kernconfdump(kernfile);
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exit(EXIT_SUCCESS);
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}
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if (argc != 1)
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usage();
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PREFIX = *argv;
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if (stat(PREFIX, &buf) != 0 || !S_ISREG(buf.st_mode))
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err(2, "%s", PREFIX);
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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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} else if (!S_ISDIR(buf.st_mode))
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errx(2, "%s isn't a directory", p);
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SLIST_INIT(&cputype);
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SLIST_INIT(&mkopt);
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SLIST_INIT(&opt);
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SLIST_INIT(&rmopts);
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STAILQ_INIT(&cfgfiles);
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STAILQ_INIT(&dtab);
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STAILQ_INIT(&fntab);
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STAILQ_INIT(&ftab);
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STAILQ_INIT(&hints);
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if (yyparse())
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exit(3);
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/*
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* Ensure that required elements (machine, cpu, ident) are present.
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*/
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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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if (ident == NULL) {
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printf("no ident line specified\n");
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exit(1);
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}
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if (SLIST_EMPTY(&cputype)) {
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printf("cpu type must be specified\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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configfile(); /* put config file into kernel*/
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options(); /* make options .h files */
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makefile(); /* build Makefile */
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makeenv(); /* build env.c */
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makehints(); /* build hints.c */
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headers(); /* make a lot of .h files */
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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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struct stat lg, phy;
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char *p, *pwd;
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int i;
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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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if ((pwd = getenv("PWD")) != NULL && *pwd == '/' &&
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(pwd = strdup(pwd)) != NULL) {
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/* Remove the last two path components. */
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for (i = 0; i < 2; i++) {
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if ((p = strrchr(pwd, '/')) == NULL) {
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free(pwd);
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return;
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}
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*p = '\0';
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}
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if (stat(pwd, &lg) != -1 && stat(srcdir, &phy) != -1 &&
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lg.st_dev == phy.st_dev && lg.st_ino == phy.st_ino)
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strlcpy(srcdir, pwd, MAXPATHLEN);
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free(pwd);
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}
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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 [-CgpV] [-d destdir] sysname\n");
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fprintf(stderr, " config -x kernel\n");
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exit(EX_USAGE);
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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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/*
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* Generate configuration file based on actual settings. With this mode, user
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* will be able to obtain and build conifguration file with one command.
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*/
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static void
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configfile_dynamic(struct sbuf *sb)
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{
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struct cputype *cput;
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struct device *d;
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struct opt *ol;
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char *lend;
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unsigned int i;
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asprintf(&lend, "\\n\\\n");
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assert(lend != NULL);
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sbuf_printf(sb, "options\t%s%s", OPT_AUTOGEN, lend);
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sbuf_printf(sb, "ident\t%s%s", ident, lend);
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sbuf_printf(sb, "machine\t%s%s", machinename, lend);
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SLIST_FOREACH(cput, &cputype, cpu_next)
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sbuf_printf(sb, "cpu\t%s%s", cput->cpu_name, lend);
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SLIST_FOREACH(ol, &mkopt, op_next)
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sbuf_printf(sb, "makeoptions\t%s=%s%s", ol->op_name,
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ol->op_value, lend);
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SLIST_FOREACH(ol, &opt, op_next) {
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if (strncmp(ol->op_name, "DEV_", 4) == 0)
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continue;
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sbuf_printf(sb, "options\t%s", ol->op_name);
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if (ol->op_value != NULL) {
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sbuf_putc(sb, '=');
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for (i = 0; i < strlen(ol->op_value); i++) {
|
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if (ol->op_value[i] == '"')
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sbuf_printf(sb, "\\%c",
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ol->op_value[i]);
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else
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sbuf_printf(sb, "%c",
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ol->op_value[i]);
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}
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sbuf_printf(sb, "%s", lend);
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} else {
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sbuf_printf(sb, "%s", lend);
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}
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}
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/*
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* Mark this file as containing everything we need.
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*/
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STAILQ_FOREACH(d, &dtab, d_next)
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sbuf_printf(sb, "device\t%s%s", d->d_name, lend);
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free(lend);
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}
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|
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/*
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|
* Generate file from the configuration files.
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*/
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static void
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configfile_filebased(struct sbuf *sb)
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{
|
|
FILE *cff;
|
|
struct cfgfile *cf;
|
|
int i;
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|
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STAILQ_FOREACH(cf, &cfgfiles, cfg_next) {
|
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cff = fopen(cf->cfg_path, "r");
|
|
if (cff == NULL) {
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warn("Couldn't open file %s", cf->cfg_path);
|
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continue;
|
|
}
|
|
while ((i = getc(cff)) != EOF) {
|
|
if (i == '\n')
|
|
sbuf_printf(sb, "\\n\\\n");
|
|
else if (i == '"' || i == '\'')
|
|
sbuf_printf(sb, "\\%c", i);
|
|
else
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|
sbuf_putc(sb, i);
|
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}
|
|
fclose(cff);
|
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}
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}
|
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|
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static void
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|
configfile(void)
|
|
{
|
|
FILE *fo;
|
|
struct sbuf *sb;
|
|
char *p;
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|
|
/* Add main configuration file to the list of files to be included */
|
|
cfgfile_add(PREFIX);
|
|
p = path("config.c.new");
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|
fo = fopen(p, "w");
|
|
if (!fo)
|
|
err(2, "%s", p);
|
|
sb = sbuf_new(NULL, NULL, 2048, SBUF_AUTOEXTEND);
|
|
assert(sb != NULL);
|
|
sbuf_clear(sb);
|
|
/*
|
|
* Try to read all configuration files. Since those will be present as
|
|
* C string in the macro, we have to slash their ends then the line
|
|
* wraps.
|
|
*/
|
|
if (filebased) {
|
|
/* Is needed, can be used for backward compatibility. */
|
|
configfile_filebased(sb);
|
|
} else {
|
|
configfile_dynamic(sb);
|
|
}
|
|
sbuf_finish(sb);
|
|
/*
|
|
* We print first part of the tamplate, replace our tag with
|
|
* configuration files content and later continue writing our
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|
* template.
|
|
*/
|
|
p = strstr(kernconfstr, KERNCONFTAG);
|
|
if (p == NULL)
|
|
errx(EXIT_FAILURE, "Something went terribly wrong!");
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|
*p = '\0';
|
|
fprintf(fo, "%s", kernconfstr);
|
|
fprintf(fo, "%s", sbuf_data(sb));
|
|
p += strlen(KERNCONFTAG);
|
|
fprintf(fo, "%s", p);
|
|
sbuf_delete(sb);
|
|
fclose(fo);
|
|
moveifchanged(path("config.c.new"), path("config.c"));
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|
cfgfile_removeall();
|
|
}
|
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|
|
/*
|
|
* moveifchanged --
|
|
* compare two files; rename if changed.
|
|
*/
|
|
void
|
|
moveifchanged(const char *from_name, const char *to_name)
|
|
{
|
|
char *p, *q;
|
|
int changed;
|
|
size_t tsize;
|
|
struct stat from_sb, to_sb;
|
|
int from_fd, to_fd;
|
|
|
|
changed = 0;
|
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|
|
if ((from_fd = open(from_name, O_RDONLY)) < 0)
|
|
err(EX_OSERR, "moveifchanged open(%s)", from_name);
|
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|
|
if ((to_fd = open(to_name, O_RDONLY)) < 0)
|
|
changed++;
|
|
|
|
if (!changed && fstat(from_fd, &from_sb) < 0)
|
|
err(EX_OSERR, "moveifchanged fstat(%s)", from_name);
|
|
|
|
if (!changed && fstat(to_fd, &to_sb) < 0)
|
|
err(EX_OSERR, "moveifchanged fstat(%s)", to_name);
|
|
|
|
if (!changed && from_sb.st_size != to_sb.st_size)
|
|
changed++;
|
|
|
|
tsize = (size_t)from_sb.st_size;
|
|
|
|
if (!changed) {
|
|
p = mmap(NULL, tsize, PROT_READ, MAP_SHARED, from_fd, (off_t)0);
|
|
#ifndef MAP_FAILED
|
|
#define MAP_FAILED ((caddr_t) -1)
|
|
#endif
|
|
if (p == MAP_FAILED)
|
|
err(EX_OSERR, "mmap %s", from_name);
|
|
q = mmap(NULL, tsize, PROT_READ, MAP_SHARED, to_fd, (off_t)0);
|
|
if (q == MAP_FAILED)
|
|
err(EX_OSERR, "mmap %s", to_name);
|
|
|
|
changed = memcmp(p, q, tsize);
|
|
munmap(p, tsize);
|
|
munmap(q, tsize);
|
|
}
|
|
if (changed) {
|
|
if (rename(from_name, to_name) < 0)
|
|
err(EX_OSERR, "rename(%s, %s)", from_name, to_name);
|
|
} else {
|
|
if (unlink(from_name) < 0)
|
|
err(EX_OSERR, "unlink(%s)", from_name);
|
|
}
|
|
}
|
|
|
|
static void
|
|
cleanheaders(char *p)
|
|
{
|
|
DIR *dirp;
|
|
struct dirent *dp;
|
|
struct file_list *fl;
|
|
struct hdr_list *hl;
|
|
int i;
|
|
|
|
remember("y.tab.h");
|
|
remember("setdefs.h");
|
|
STAILQ_FOREACH(fl, &ftab, f_next)
|
|
remember(fl->f_fn);
|
|
|
|
/*
|
|
* Scan the build directory and clean out stuff that looks like
|
|
* it might have been a leftover NFOO header, etc.
|
|
*/
|
|
if ((dirp = opendir(p)) == NULL)
|
|
err(EX_OSERR, "opendir %s", p);
|
|
while ((dp = readdir(dirp)) != NULL) {
|
|
i = dp->d_namlen - 2;
|
|
/* Skip non-headers */
|
|
if (dp->d_name[i] != '.' || dp->d_name[i + 1] != 'h')
|
|
continue;
|
|
/* Skip special stuff, eg: bus_if.h, but check opt_*.h */
|
|
if (index(dp->d_name, '_') &&
|
|
strncmp(dp->d_name, "opt_", 4) != 0)
|
|
continue;
|
|
/* Check if it is a target file */
|
|
for (hl = htab; hl != NULL; hl = hl->h_next) {
|
|
if (eq(dp->d_name, hl->h_name)) {
|
|
break;
|
|
}
|
|
}
|
|
if (hl)
|
|
continue;
|
|
printf("Removing stale header: %s\n", dp->d_name);
|
|
if (unlink(path(dp->d_name)) == -1)
|
|
warn("unlink %s", dp->d_name);
|
|
}
|
|
(void)closedir(dirp);
|
|
}
|
|
|
|
void
|
|
remember(const char *file)
|
|
{
|
|
char *s;
|
|
struct hdr_list *hl;
|
|
|
|
if ((s = strrchr(file, '/')) != NULL)
|
|
s = ns(s + 1);
|
|
else
|
|
s = ns(file);
|
|
|
|
if (index(s, '_') && strncmp(s, "opt_", 4) != 0) {
|
|
free(s);
|
|
return;
|
|
}
|
|
for (hl = htab; hl != NULL; hl = hl->h_next) {
|
|
if (eq(s, hl->h_name)) {
|
|
free(s);
|
|
return;
|
|
}
|
|
}
|
|
hl = calloc(1, sizeof(*hl));
|
|
hl->h_name = s;
|
|
hl->h_next = htab;
|
|
htab = hl;
|
|
}
|
|
|
|
/*
|
|
* This one is quick hack. Will be probably moved to elf(3) interface.
|
|
* It takes kernel configuration file name, passes it as an argument to
|
|
* elfdump -a, which output is parsed by some UNIX tools...
|
|
*/
|
|
static void
|
|
kernconfdump(const char *file)
|
|
{
|
|
struct stat st;
|
|
FILE *fp, *pp;
|
|
int error, len, osz, r;
|
|
unsigned int off, size;
|
|
char *cmd, *o;
|
|
|
|
r = open(file, O_RDONLY);
|
|
if (r == -1)
|
|
errx(EXIT_FAILURE, "Couldn't open file '%s'", file);
|
|
error = fstat(r, &st);
|
|
if (error == -1)
|
|
errx(EXIT_FAILURE, "fstat() failed");
|
|
if (S_ISDIR(st.st_mode))
|
|
errx(EXIT_FAILURE, "'%s' is a directory", file);
|
|
fp = fdopen(r, "r");
|
|
if (fp == NULL)
|
|
errx(EXIT_FAILURE, "fdopen() failed");
|
|
osz = 1024;
|
|
o = calloc(1, osz);
|
|
if (o == NULL)
|
|
errx(EXIT_FAILURE, "Couldn't allocate memory");
|
|
/* ELF note section header. */
|
|
asprintf(&cmd, "/usr/bin/elfdump -c %s | grep -A 5 kern_conf"
|
|
"| tail -2 | cut -d ' ' -f 2 | paste - - -", file);
|
|
if (cmd == NULL)
|
|
errx(EXIT_FAILURE, "asprintf() failed");
|
|
pp = popen(cmd, "r");
|
|
if (pp == NULL)
|
|
errx(EXIT_FAILURE, "popen() failed");
|
|
free(cmd);
|
|
len = fread(o, osz, 1, pp);
|
|
pclose(pp);
|
|
r = sscanf(o, "%d\t%d", &off, &size);
|
|
free(o);
|
|
if (r != 2)
|
|
errx(EXIT_FAILURE, "File %s doesn't contain configuration "
|
|
"file. Either unsupported, or not compiled with "
|
|
"INCLUDE_CONFIG_FILE", file);
|
|
r = fseek(fp, off, SEEK_CUR);
|
|
if (r != 0)
|
|
errx(EXIT_FAILURE, "fseek() failed");
|
|
while ((r = fgetc(fp)) != EOF && size-- > 0)
|
|
fputc(r, stdout);
|
|
fclose(fp);
|
|
}
|