FreeBSD-5.3/usr.sbin/config/main.c
/*
* 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: src/usr.sbin/config/main.c,v 1.60 2004/08/07 04:19:37 imp Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/mman.h>
#include <sys/param.h>
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <sysexits.h>
#include <unistd.h>
#include <dirent.h>
#include "y.tab.h"
#include "config.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;
static void configfile(void);
static void get_srcdir(void);
static void usage(void);
static void cleanheaders(char *);
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 xxx[MAXPATHLEN];
while ((ch = getopt(argc, argv, "d:gp")) != -1)
switch (ch) {
case 'd':
if (*destdir == '\0')
strlcpy(destdir, optarg, sizeof(destdir));
else
errx(2, "directory already set");
break;
case 'g':
debugging++;
break;
case 'p':
profiling++;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 1)
usage();
if (freopen(PREFIX = *argv, "r", stdin) == NULL)
err(2, "%s", 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));
}
p = path((char *)NULL);
if (stat(p, &buf)) {
if (mkdir(p, 0777))
err(2, "%s", p);
}
else if ((buf.st_mode & S_IFMT) != S_IFDIR)
errx(2, "%s isn't a directory", p);
STAILQ_INIT(&dtab);
STAILQ_INIT(&fntab);
SLIST_INIT(&cputype);
STAILQ_INIT(&ftab);
yyfile = *argv;
if (yyparse())
exit(3);
if (machinename == NULL) {
printf("Specify machine type, e.g. ``machine i386''\n");
exit(1);
}
/*
* make symbolic links in compilation directory
* for "sys" (to make genassym.c work along with #include <sys/xxx>)
* and similarly for "machine".
*/
if (*srcdir == '\0')
(void)snprintf(xxx, sizeof(xxx), "../../include");
else
(void)snprintf(xxx, sizeof(xxx), "%s/%s/include",
srcdir, machinename);
(void) unlink(path("machine"));
(void) symlink(xxx, path("machine"));
options(); /* make options .h files */
makefile(); /* build Makefile */
headers(); /* make a lot of .h files */
configfile(); /* put config file into kernel*/
cleanheaders(p);
printf("Kernel build directory is %s\n", p);
printf("Don't forget to do a ``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)
{
if (realpath("../..", srcdir) == NULL)
errx(2, "Unable to find root of source tree");
}
static void
usage(void)
{
fprintf(stderr, "usage: config [-gp] [-d destdir] sysname\n");
exit(1);
}
/*
* 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);
}
static void
configfile(void)
{
FILE *fi, *fo;
char *p;
int i;
fi = fopen(PREFIX, "r");
if (!fi)
err(2, "%s", PREFIX);
fo = fopen(p=path("config.c.new"), "w");
if (!fo)
err(2, "%s", p);
fprintf(fo, "#include \"opt_config.h\"\n");
fprintf(fo, "#ifdef INCLUDE_CONFIG_FILE \n");
fprintf(fo, "static const char config[] = \"\\\n");
fprintf(fo, "START CONFIG FILE %s\\n\\\n___", PREFIX);
while (EOF != (i=getc(fi))) {
if (i == '\n') {
fprintf(fo, "\\n\\\n___");
} else if (i == '\"') {
fprintf(fo, "\\\"");
} else if (i == '\\') {
fprintf(fo, "\\\\");
} else {
putc(i, fo);
}
}
fprintf(fo, "\\n\\\nEND CONFIG FILE %s\\n\\\n", PREFIX);
fprintf(fo, "\";\n");
fprintf(fo, "\n#endif /* INCLUDE_CONFIG_FILE */\n");
fclose(fi);
fclose(fo);
moveifchanged(path("config.c.new"), path("config.c"));
}
/*
* 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);
#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 (strcmp(dp->d_name, hl->h_name) == 0) {
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 (strcmp(s, hl->h_name) == 0) {
free(s);
return;
}
}
hl = malloc(sizeof(*hl));
bzero(hl, sizeof(*hl));
hl->h_name = s;
hl->h_next = htab;
htab = hl;
}