freebsd-dev/usr.sbin/kgzip/kgzip.c

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/*
* Copyright (c) 1999 Global Technology Associates, Inc.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 rcsid[] =
1999-08-28 01:35:59 +00:00
"$FreeBSD$";
#endif /* not lint */
#include <sys/types.h>
#include <err.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "kgzip.h"
#define FN_SRC 0 /* Filename: source */
#define FN_OBJ 1 /* Filename: relocatable */
#define FN_KGZ 2 /* Filename: executable */
#define FN_CNT 3 /* Number of filenames */
#define SFX_OBJ ".o" /* Filename suffix: relocatable */
#define SFX_KGZ ".kgz" /* Filename suffix: executable */
#define SFX_MAX 5 /* Size of larger filename suffix */
const char *loader = "/usr/lib/kgzldr.o"; /* Default loader */
int format; /* Output format */
char *tname; /* Name of temporary file */
static void cleanup(void);
static void mk_fn(int, const char *, const char *, char *[]);
static void usage(void);
/*
* Compress a kernel.
*/
int
main(int argc, char *argv[])
{
static char *fn[FN_CNT];
struct kgz_hdr kh;
const char *output;
char *tmpdir;
int cflag, vflag, c;
tmpdir = getenv("TMPDIR");
if (asprintf(&tname, "%s/kgzXXXXXXXXXX",
tmpdir == NULL ? _PATH_TMP : tmpdir) == -1)
errx(1, "Out of memory");
output = NULL;
cflag = vflag = 0;
while ((c = getopt(argc, argv, "cvf:l:o:")) != -1)
switch (c) {
case 'c':
cflag = 1;
break;
case 'v':
vflag = 1;
break;
case 'f':
if (!strcmp(optarg, "aout"))
format = F_AOUT;
else if (!strcmp(optarg, "elf"))
format = F_ELF;
else
errx(1, "%s: Unknown format", optarg);
break;
case 'l':
loader = optarg;
break;
case 'o':
output = optarg;
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 1)
usage();
atexit(cleanup);
mk_fn(cflag, *argv, output, fn);
memset(&kh, 0, sizeof(kh));
if (fn[FN_SRC]) {
if (!format)
format = F_ELF;
kgzcmp(&kh, fn[FN_SRC], fn[FN_OBJ]);
}
if (!cflag)
kgzld(&kh, fn[FN_OBJ], fn[FN_KGZ]);
if (vflag)
printf("dload=%#x dsize=%#x isize=%#x entry=%#x nsize=%#x\n",
kh.dload, kh.dsize, kh.isize, kh.entry, kh.nsize);
return 0;
}
/*
* Clean up after processing.
*/
static void
cleanup(void)
{
if (tname)
unlink(tname);
}
/*
* Make the required filenames.
*/
static void
mk_fn(int cflag, const char *f1, const char *f2, char *fn[])
{
const char *p, *s;
size_t n;
int i, fd;
i = 0;
s = strrchr(f1, 0);
n = sizeof(SFX_OBJ) - 1;
if ((size_t)(s - f1) > n && !memcmp(s - n, SFX_OBJ, n)) {
s -= n;
i++;
}
fn[i++] = (char *)f1;
if (i == FN_OBJ && !cflag) {
if ((fd = mkstemp(tname)) == -1)
err(1, NULL);
close(fd);
fn[i++] = (char *)tname;
}
if (!(fn[i] = (char *)f2)) {
p = (p = strrchr(f1, '/')) ? p + 1 : f1;
n = (size_t)(s - p);
if (!(fn[i] = malloc(n + SFX_MAX)))
err(1, NULL);
memcpy(fn[i], p, n);
strcpy(fn[i] + n, i == FN_OBJ ? SFX_OBJ : SFX_KGZ);
}
}
/*
* Display usage information.
*/
static void
usage(void)
{
fprintf(stderr,
"usage: kgzip [-cv] [-f format] [-l file] [-o filename] file\n");
exit(1);
}