872b698bd4
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
781 lines
17 KiB
C
781 lines
17 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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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. 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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static void checkversion(void);
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extern int yyparse(void);
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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 *kernfile;
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struct includepath* ipath;
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int printmachine;
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printmachine = 0;
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kernfile = NULL;
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SLIST_INIT(&includepath);
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while ((ch = getopt(argc, argv, "CI:d:gmpsVx:")) != -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 'I':
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ipath = (struct includepath *) \
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calloc(1, sizeof (struct includepath));
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if (ipath == NULL)
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err(EXIT_FAILURE, "calloc");
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ipath->path = optarg;
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SLIST_INSERT_HEAD(&includepath, ipath, path_next);
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break;
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case 'm':
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printmachine = 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(EXIT_FAILURE, "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 's':
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if (*srcdir == '\0')
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strlcpy(srcdir, optarg, sizeof(srcdir));
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else
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errx(EXIT_FAILURE, "src directory already set");
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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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if (*srcdir == '\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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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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checkversion();
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if (printmachine) {
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printf("%s\t%s\n",machinename,machinearch);
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exit(0);
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}
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/* Make compile directory */
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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(EXIT_FAILURE, "%s isn't a directory", p);
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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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err(EXIT_FAILURE, "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,
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"usage: config [-CgmpV] [-d destdir] [-s srcdir] 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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/* Negation operator is a word by itself. */
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if (ch == '!') {
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*cp = 0;
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return (line);
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}
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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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escaped_nl = 0;
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while ((ch = getc(fp)) != EOF) {
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if (ch == quote && !escaped_nl)
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break;
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if (ch == '\n' && !escaped_nl) {
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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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if (ch == '\\' && !escaped_nl) {
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escaped_nl = 1;
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continue;
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}
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if (ch != quote && escaped_nl)
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*cp++ = '\\';
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*cp++ = ch;
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escaped_nl = 0;
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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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* 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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{
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FILE *cff;
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struct cfgfile *cf;
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int i;
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/*
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* Try to read all configuration files. Since those will be present as
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* C string in the macro, we have to slash their ends then the line
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* wraps.
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*/
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STAILQ_FOREACH(cf, &cfgfiles, cfg_next) {
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cff = fopen(cf->cfg_path, "r");
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if (cff == NULL) {
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warn("Couldn't open file %s", cf->cfg_path);
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continue;
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}
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while ((i = getc(cff)) != EOF) {
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if (i == '\n')
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sbuf_printf(sb, "\\n\\\n");
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else if (i == '"' || i == '\'')
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sbuf_printf(sb, "\\%c", i);
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else
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sbuf_putc(sb, i);
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}
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fclose(cff);
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}
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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 *fo;
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struct sbuf *sb;
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char *p;
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/* Add main configuration file to the list of files to be included */
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cfgfile_add(PREFIX);
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p = path("config.c.new");
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fo = fopen(p, "w");
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if (!fo)
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err(2, "%s", p);
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sb = sbuf_new(NULL, NULL, 2048, SBUF_AUTOEXTEND);
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assert(sb != NULL);
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sbuf_clear(sb);
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if (filebased) {
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/* Is needed, can be used for backward compatibility. */
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configfile_filebased(sb);
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} else {
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configfile_dynamic(sb);
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}
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sbuf_finish(sb);
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/*
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* We print first part of the template, replace our tag with
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* configuration files content and later continue writing our
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* template.
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*/
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p = strstr(kernconfstr, KERNCONFTAG);
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if (p == NULL)
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errx(EXIT_FAILURE, "Something went terribly wrong!");
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*p = '\0';
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fprintf(fo, "%s", kernconfstr);
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fprintf(fo, "%s", sbuf_data(sb));
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p += strlen(KERNCONFTAG);
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fprintf(fo, "%s", p);
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sbuf_delete(sb);
|
|
fclose(fo);
|
|
moveifchanged(path("config.c.new"), path("config.c"));
|
|
cfgfile_removeall();
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
if ((from_fd = open(from_name, O_RDONLY)) < 0)
|
|
err(EX_OSERR, "moveifchanged open(%s)", from_name);
|
|
|
|
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);
|
|
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;
|
|
size_t len;
|
|
|
|
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) {
|
|
len = strlen(dp->d_name);
|
|
/* Skip non-headers */
|
|
if (len < 2 || dp->d_name[len - 2] != '.' ||
|
|
dp->d_name[len - 1] != 'h')
|
|
continue;
|
|
/* Skip special stuff, eg: bus_if.h, but check opt_*.h */
|
|
if (strchr(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 (strchr(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));
|
|
if (hl == NULL)
|
|
err(EXIT_FAILURE, "calloc");
|
|
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, osz, r;
|
|
unsigned int i, off, size, t1, t2, align;
|
|
char *cmd, *o;
|
|
|
|
r = open(file, O_RDONLY);
|
|
if (r == -1)
|
|
err(EXIT_FAILURE, "Couldn't open file '%s'", file);
|
|
error = fstat(r, &st);
|
|
if (error == -1)
|
|
err(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)
|
|
err(EXIT_FAILURE, "fdopen() failed");
|
|
osz = 1024;
|
|
o = calloc(1, osz);
|
|
if (o == NULL)
|
|
err(EXIT_FAILURE, "Couldn't allocate memory");
|
|
/* ELF note section header. */
|
|
asprintf(&cmd, "/usr/bin/elfdump -c %s | grep -A 8 kern_conf"
|
|
"| tail -5 | 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);
|
|
(void)fread(o, osz, 1, pp);
|
|
pclose(pp);
|
|
r = sscanf(o, "%d%d%d%d%d", &off, &size, &t1, &t2, &align);
|
|
free(o);
|
|
if (r != 5)
|
|
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)
|
|
err(EXIT_FAILURE, "fseek() failed");
|
|
for (i = 0; i < size; i++) {
|
|
r = fgetc(fp);
|
|
if (r == EOF)
|
|
break;
|
|
if (r == '\0') {
|
|
assert(i == size - 1 &&
|
|
("\\0 found in the middle of a file"));
|
|
break;
|
|
}
|
|
fputc(r, stdout);
|
|
}
|
|
fclose(fp);
|
|
}
|
|
|
|
static void
|
|
badversion(int versreq)
|
|
{
|
|
fprintf(stderr, "ERROR: version of config(8) does not match kernel!\n");
|
|
fprintf(stderr, "config version = %d, ", CONFIGVERS);
|
|
fprintf(stderr, "version required = %d\n\n", versreq);
|
|
fprintf(stderr, "Make sure that /usr/src/usr.sbin/config is in sync\n");
|
|
fprintf(stderr, "with your /usr/src/sys and install a new config binary\n");
|
|
fprintf(stderr, "before trying this again.\n\n");
|
|
fprintf(stderr, "If running the new config fails check your config\n");
|
|
fprintf(stderr, "file against the GENERIC or LINT config files for\n");
|
|
fprintf(stderr, "changes in config syntax, or option/device naming\n");
|
|
fprintf(stderr, "conventions\n\n");
|
|
exit(1);
|
|
}
|
|
|
|
static void
|
|
checkversion(void)
|
|
{
|
|
FILE *ifp;
|
|
char line[BUFSIZ];
|
|
int versreq;
|
|
|
|
ifp = open_makefile_template();
|
|
while (fgets(line, BUFSIZ, ifp) != 0) {
|
|
if (*line != '%')
|
|
continue;
|
|
if (strncmp(line, "%VERSREQ=", 9) != 0)
|
|
continue;
|
|
versreq = atoi(line + 9);
|
|
if (MAJOR_VERS(versreq) == MAJOR_VERS(CONFIGVERS) &&
|
|
versreq <= CONFIGVERS)
|
|
continue;
|
|
badversion(versreq);
|
|
}
|
|
fclose(ifp);
|
|
}
|