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-rw-r--r--usr.sbin/config/main.c753
1 files changed, 753 insertions, 0 deletions
diff --git a/usr.sbin/config/main.c b/usr.sbin/config/main.c
new file mode 100644
index 0000000..14061c2
--- /dev/null
+++ b/usr.sbin/config/main.c
@@ -0,0 +1,753 @@
+/*
+ * Copyright (c) 1980, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static const char copyright[] =
+"@(#) Copyright (c) 1980, 1993\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
+#endif
+static const char rcsid[] =
+ "$FreeBSD$";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/sbuf.h>
+#include <sys/file.h>
+#include <sys/mman.h>
+#include <sys/param.h>
+
+#include <assert.h>
+#include <ctype.h>
+#include <err.h>
+#include <stdio.h>
+#include <string.h>
+#include <sysexits.h>
+#include <unistd.h>
+#include <dirent.h>
+#include "y.tab.h"
+#include "config.h"
+#include "configvers.h"
+
+#ifndef TRUE
+#define TRUE (1)
+#endif
+
+#ifndef FALSE
+#define FALSE (0)
+#endif
+
+#define CDIR "../compile/"
+
+char * PREFIX;
+char destdir[MAXPATHLEN];
+char srcdir[MAXPATHLEN];
+
+int debugging;
+int profiling;
+int found_defaults;
+int incignore;
+
+/*
+ * Preserve old behaviour in INCLUDE_CONFIG_FILE handling (files are included
+ * literally).
+ */
+int filebased = 0;
+
+static void configfile(void);
+static void get_srcdir(void);
+static void usage(void);
+static void cleanheaders(char *);
+static void kernconfdump(const char *);
+static void checkversion(void);
+extern int yyparse(void);
+
+struct hdr_list {
+ char *h_name;
+ struct hdr_list *h_next;
+} *htab;
+
+/*
+ * Config builds a set of files for building a UNIX
+ * system given a description of the desired system.
+ */
+int
+main(int argc, char **argv)
+{
+
+ struct stat buf;
+ int ch, len;
+ char *p;
+ char *kernfile;
+ int printmachine;
+
+ printmachine = 0;
+ kernfile = NULL;
+ while ((ch = getopt(argc, argv, "Cd:gmpVx:")) != -1)
+ switch (ch) {
+ case 'C':
+ filebased = 1;
+ break;
+ case 'm':
+ printmachine = 1;
+ break;
+ case 'd':
+ if (*destdir == '\0')
+ strlcpy(destdir, optarg, sizeof(destdir));
+ else
+ errx(EXIT_FAILURE, "directory already set");
+ break;
+ case 'g':
+ debugging++;
+ break;
+ case 'p':
+ profiling++;
+ break;
+ case 'V':
+ printf("%d\n", CONFIGVERS);
+ exit(0);
+ case 'x':
+ kernfile = optarg;
+ break;
+ case '?':
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (kernfile != NULL) {
+ kernconfdump(kernfile);
+ exit(EXIT_SUCCESS);
+ }
+
+ if (argc != 1)
+ usage();
+
+ PREFIX = *argv;
+ if (stat(PREFIX, &buf) != 0 || !S_ISREG(buf.st_mode))
+ err(2, "%s", PREFIX);
+ if (freopen("DEFAULTS", "r", stdin) != NULL) {
+ found_defaults = 1;
+ yyfile = "DEFAULTS";
+ } else {
+ if (freopen(PREFIX, "r", stdin) == NULL)
+ err(2, "%s", PREFIX);
+ yyfile = PREFIX;
+ }
+ if (*destdir != '\0') {
+ len = strlen(destdir);
+ while (len > 1 && destdir[len - 1] == '/')
+ destdir[--len] = '\0';
+ get_srcdir();
+ } else {
+ strlcpy(destdir, CDIR, sizeof(destdir));
+ strlcat(destdir, PREFIX, sizeof(destdir));
+ }
+
+ SLIST_INIT(&cputype);
+ SLIST_INIT(&mkopt);
+ SLIST_INIT(&opt);
+ SLIST_INIT(&rmopts);
+ STAILQ_INIT(&cfgfiles);
+ STAILQ_INIT(&dtab);
+ STAILQ_INIT(&fntab);
+ STAILQ_INIT(&ftab);
+ STAILQ_INIT(&hints);
+ if (yyparse())
+ exit(3);
+
+ /*
+ * Ensure that required elements (machine, cpu, ident) are present.
+ */
+ if (machinename == NULL) {
+ printf("Specify machine type, e.g. ``machine i386''\n");
+ exit(1);
+ }
+ if (ident == NULL) {
+ printf("no ident line specified\n");
+ exit(1);
+ }
+ if (SLIST_EMPTY(&cputype)) {
+ printf("cpu type must be specified\n");
+ exit(1);
+ }
+ checkversion();
+
+ if (printmachine) {
+ printf("%s\t%s\n",machinename,machinearch);
+ exit(0);
+ }
+
+ /* Make compile directory */
+ p = path((char *)NULL);
+ if (stat(p, &buf)) {
+ if (mkdir(p, 0777))
+ err(2, "%s", p);
+ } else if (!S_ISDIR(buf.st_mode))
+ errx(EXIT_FAILURE, "%s isn't a directory", p);
+
+ configfile(); /* put config file into kernel*/
+ options(); /* make options .h files */
+ makefile(); /* build Makefile */
+ makeenv(); /* build env.c */
+ makehints(); /* build hints.c */
+ headers(); /* make a lot of .h files */
+ cleanheaders(p);
+ printf("Kernel build directory is %s\n", p);
+ printf("Don't forget to do ``make cleandepend && make depend''\n");
+ exit(0);
+}
+
+/*
+ * get_srcdir
+ * determine the root of the kernel source tree
+ * and save that in srcdir.
+ */
+static void
+get_srcdir(void)
+{
+ struct stat lg, phy;
+ char *p, *pwd;
+ int i;
+
+ if (realpath("../..", srcdir) == NULL)
+ err(EXIT_FAILURE, "Unable to find root of source tree");
+ if ((pwd = getenv("PWD")) != NULL && *pwd == '/' &&
+ (pwd = strdup(pwd)) != NULL) {
+ /* Remove the last two path components. */
+ for (i = 0; i < 2; i++) {
+ if ((p = strrchr(pwd, '/')) == NULL) {
+ free(pwd);
+ return;
+ }
+ *p = '\0';
+ }
+ if (stat(pwd, &lg) != -1 && stat(srcdir, &phy) != -1 &&
+ lg.st_dev == phy.st_dev && lg.st_ino == phy.st_ino)
+ strlcpy(srcdir, pwd, MAXPATHLEN);
+ free(pwd);
+ }
+}
+
+static void
+usage(void)
+{
+
+ fprintf(stderr, "usage: config [-CgmpV] [-d destdir] sysname\n");
+ fprintf(stderr, " config -x kernel\n");
+ exit(EX_USAGE);
+}
+
+/*
+ * get_word
+ * returns EOF on end of file
+ * NULL on end of line
+ * pointer to the word otherwise
+ */
+char *
+get_word(FILE *fp)
+{
+ static char line[80];
+ int ch;
+ char *cp;
+ int escaped_nl = 0;
+
+begin:
+ while ((ch = getc(fp)) != EOF)
+ if (ch != ' ' && ch != '\t')
+ break;
+ if (ch == EOF)
+ return ((char *)EOF);
+ if (ch == '\\'){
+ escaped_nl = 1;
+ goto begin;
+ }
+ if (ch == '\n') {
+ if (escaped_nl){
+ escaped_nl = 0;
+ goto begin;
+ }
+ else
+ return (NULL);
+ }
+ cp = line;
+ *cp++ = ch;
+ while ((ch = getc(fp)) != EOF) {
+ if (isspace(ch))
+ break;
+ *cp++ = ch;
+ }
+ *cp = 0;
+ if (ch == EOF)
+ return ((char *)EOF);
+ (void) ungetc(ch, fp);
+ return (line);
+}
+
+/*
+ * get_quoted_word
+ * like get_word but will accept something in double or single quotes
+ * (to allow embedded spaces).
+ */
+char *
+get_quoted_word(FILE *fp)
+{
+ static char line[256];
+ int ch;
+ char *cp;
+ int escaped_nl = 0;
+
+begin:
+ while ((ch = getc(fp)) != EOF)
+ if (ch != ' ' && ch != '\t')
+ break;
+ if (ch == EOF)
+ return ((char *)EOF);
+ if (ch == '\\'){
+ escaped_nl = 1;
+ goto begin;
+ }
+ if (ch == '\n') {
+ if (escaped_nl){
+ escaped_nl = 0;
+ goto begin;
+ }
+ else
+ return (NULL);
+ }
+ cp = line;
+ if (ch == '"' || ch == '\'') {
+ int quote = ch;
+
+ while ((ch = getc(fp)) != EOF) {
+ if (ch == quote)
+ break;
+ if (ch == '\n') {
+ *cp = 0;
+ printf("config: missing quote reading `%s'\n",
+ line);
+ exit(2);
+ }
+ *cp++ = ch;
+ }
+ } else {
+ *cp++ = ch;
+ while ((ch = getc(fp)) != EOF) {
+ if (isspace(ch))
+ break;
+ *cp++ = ch;
+ }
+ if (ch != EOF)
+ (void) ungetc(ch, fp);
+ }
+ *cp = 0;
+ if (ch == EOF)
+ return ((char *)EOF);
+ return (line);
+}
+
+/*
+ * prepend the path to a filename
+ */
+char *
+path(const char *file)
+{
+ char *cp = NULL;
+
+ if (file)
+ asprintf(&cp, "%s/%s", destdir, file);
+ else
+ cp = strdup(destdir);
+ return (cp);
+}
+
+/*
+ * Generate configuration file based on actual settings. With this mode, user
+ * will be able to obtain and build conifguration file with one command.
+ */
+static void
+configfile_dynamic(struct sbuf *sb)
+{
+ struct cputype *cput;
+ struct device *d;
+ struct opt *ol;
+ char *lend;
+ unsigned int i;
+
+ asprintf(&lend, "\\n\\\n");
+ assert(lend != NULL);
+ sbuf_printf(sb, "options\t%s%s", OPT_AUTOGEN, lend);
+ sbuf_printf(sb, "ident\t%s%s", ident, lend);
+ sbuf_printf(sb, "machine\t%s%s", machinename, lend);
+ SLIST_FOREACH(cput, &cputype, cpu_next)
+ sbuf_printf(sb, "cpu\t%s%s", cput->cpu_name, lend);
+ SLIST_FOREACH(ol, &mkopt, op_next)
+ sbuf_printf(sb, "makeoptions\t%s=%s%s", ol->op_name,
+ ol->op_value, lend);
+ SLIST_FOREACH(ol, &opt, op_next) {
+ if (strncmp(ol->op_name, "DEV_", 4) == 0)
+ continue;
+ sbuf_printf(sb, "options\t%s", ol->op_name);
+ if (ol->op_value != NULL) {
+ sbuf_putc(sb, '=');
+ for (i = 0; i < strlen(ol->op_value); i++) {
+ if (ol->op_value[i] == '"')
+ sbuf_printf(sb, "\\%c",
+ ol->op_value[i]);
+ else
+ sbuf_printf(sb, "%c",
+ ol->op_value[i]);
+ }
+ sbuf_printf(sb, "%s", lend);
+ } else {
+ sbuf_printf(sb, "%s", lend);
+ }
+ }
+ /*
+ * Mark this file as containing everything we need.
+ */
+ STAILQ_FOREACH(d, &dtab, d_next)
+ sbuf_printf(sb, "device\t%s%s", d->d_name, lend);
+ free(lend);
+}
+
+/*
+ * Generate file from the configuration files.
+ */
+static void
+configfile_filebased(struct sbuf *sb)
+{
+ FILE *cff;
+ struct cfgfile *cf;
+ int i;
+
+ /*
+ * 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.
+ */
+ STAILQ_FOREACH(cf, &cfgfiles, cfg_next) {
+ cff = fopen(cf->cfg_path, "r");
+ if (cff == NULL) {
+ warn("Couldn't open file %s", cf->cfg_path);
+ continue;
+ }
+ while ((i = getc(cff)) != EOF) {
+ if (i == '\n')
+ sbuf_printf(sb, "\\n\\\n");
+ else if (i == '"' || i == '\'')
+ sbuf_printf(sb, "\\%c", i);
+ else
+ sbuf_putc(sb, i);
+ }
+ fclose(cff);
+ }
+}
+
+static void
+configfile(void)
+{
+ FILE *fo;
+ struct sbuf *sb;
+ char *p;
+
+ /* Add main configuration file to the list of files to be included */
+ cfgfile_add(PREFIX);
+ p = path("config.c.new");
+ fo = fopen(p, "w");
+ if (!fo)
+ err(2, "%s", p);
+ sb = sbuf_new(NULL, NULL, 2048, SBUF_AUTOEXTEND);
+ assert(sb != NULL);
+ sbuf_clear(sb);
+ 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 template, replace our tag with
+ * configuration files content and later continue writing our
+ * template.
+ */
+ p = strstr(kernconfstr, KERNCONFTAG);
+ if (p == NULL)
+ errx(EXIT_FAILURE, "Something went terribly wrong!");
+ *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"));
+ 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, len, 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);
+ len = 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 '\0' is present in the middle of the configuration
+ * string, this means something very weird is happening.
+ * Make such case very visible. However, some architectures
+ * pad the length of the section with NULs to a multiple of
+ * sh_addralign, allow a NUL in that part of the section.
+ */
+ if (r == '\0' && (size - i) < align)
+ break;
+ assert(r != '\0' && ("Char present in the configuration "
+ "string mustn't be equal to 0"));
+ 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);
+}
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