freebsd-skq/usr.sbin/config/main.c
Peter Wemm d8f19d9417 Make a little more effort to avoid touching certain generated files if
they were not changed.  This makes 'make depend' more useful.
1996-01-12 08:57:10 +00:00

396 lines
8.3 KiB
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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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 char copyright[] =
"@(#) Copyright (c) 1980, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/mman.h>
#include <stdio.h>
#include <ctype.h>
#include <err.h>
#include <sysexits.h>
#include "y.tab.h"
#include "config.h"
#ifndef TRUE
#define TRUE (1)
#endif
#ifndef FALSE
#define FALSE (0)
#endif
static char *PREFIX;
static int no_config_clobber = FALSE;
int old_config_present;
/*
* Config builds a set of files for building a UNIX
* system given a description of the desired system.
*/
main(argc, argv)
int argc;
char **argv;
{
extern char *optarg;
extern int optind;
struct stat buf;
int ch;
char *p;
while ((ch = getopt(argc, argv, "gpn")) != EOF)
switch (ch) {
case 'g':
debugging++;
break;
case 'p':
profiling++;
break;
case 'n':
no_config_clobber = TRUE;
break;
case '?':
default:
goto usage;
}
argc -= optind;
argv += optind;
if (argc != 1) {
usage: fputs("usage: config [-gpn] sysname\n", stderr);
exit(1);
}
if (freopen(PREFIX = *argv, "r", stdin) == NULL) {
perror(PREFIX);
exit(2);
}
if (getenv("NO_CONFIG_CLOBBER"))
no_config_clobber = TRUE;
p = path((char *)NULL);
if (stat(p, &buf)) {
if (mkdir(p, 0777)) {
perror(p);
exit(2);
}
}
else if ((buf.st_mode & S_IFMT) != S_IFDIR) {
fprintf(stderr, "config: %s isn't a directory.\n", p);
exit(2);
}
#ifndef NO_CLOBBER_EVER
else if (!no_config_clobber) {
char tmp[strlen(p) + 8];
fprintf(stderr, "Removing old directory %s: ", p);
fflush(stderr);
sprintf(tmp, "rm -rf %s", p);
if (system(tmp)) {
fprintf(stderr, "Failed!\n");
perror(tmp);
exit(2);
}
fprintf(stderr, "Done.\n");
if (mkdir(p, 0777)) {
perror(p);
exit(2);
}
}
#endif
else
old_config_present++;
loadaddress = -1;
dtab = NULL;
confp = &conf_list;
compp = &comp_list;
if (yyparse())
exit(3);
switch (machine) {
case MACHINE_VAX:
vax_ioconf(); /* Print ioconf.c */
ubglue(); /* Create ubglue.s */
break;
case MACHINE_TAHOE:
tahoe_ioconf();
vbglue();
break;
case MACHINE_HP300:
case MACHINE_LUNA68K:
hp300_ioconf();
hpglue();
break;
case MACHINE_I386:
i386_ioconf(); /* Print ioconf.c */
vector(); /* Create vector.s */
break;
case MACHINE_MIPS:
case MACHINE_PMAX:
pmax_ioconf();
break;
case MACHINE_NEWS3400:
news_ioconf();
break;
default:
printf("Specify machine type, e.g. ``machine vax''\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".
*/
{
char xxx[80];
(void) sprintf(xxx, "../../%s/include", machinename);
(void) symlink(xxx, path("machine"));
}
options(); /* make options .h files */
makefile(); /* build Makefile */
headers(); /* make a lot of .h files */
swapconf(); /* swap config files */
printf("Kernel build directory is %s\n", p);
exit(0);
}
/*
* get_word
* returns EOF on end of file
* NULL on end of line
* pointer to the word otherwise
*/
char *
get_word(fp)
register FILE *fp;
{
static char line[80];
register int ch;
register 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(fp)
register FILE *fp;
{
static char line[256];
register int ch;
register 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 == '\'') {
register 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(file)
char *file;
{
register char *cp;
#define CDIR "../../compile/"
cp = malloc((unsigned int)(sizeof(CDIR) + strlen(PREFIX) +
(file ? strlen(file) : 0) + 2));
(void) strcpy(cp, CDIR);
(void) strcat(cp, PREFIX);
if (file) {
(void) strcat(cp, "/");
(void) strcat(cp, file);
}
return (cp);
}
/*
* 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, 0, from_fd, (off_t)0);
if ((long)p == -1)
err(EX_OSERR, "mmap %s", from_name);
q = mmap(NULL, tsize, PROT_READ, 0, to_fd, (off_t)0);
if ((long)q == -1)
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, %s)", from_name);
}
#ifdef DIAG
if (changed)
printf("CHANGED! rename (%s, %s)\n", from_name, to_name);
else
printf("SAME! unlink (%s)\n", from_name);
#endif
return;
}