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/*-
* Copyright (c) 1996 Søren Schmidt
* 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
* in this position and unchanged.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software withough specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*
* $FreeBSD$
*/
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/imgact_elf.h>
int usage();
main(int argc, char **argv)
{
extern char *optarg;
extern int optind;
char type[10] = "FreeBSD";
int ch, change = 0, verbose = 0;
while ((ch = getopt(argc, argv, "t:v")) != EOF)
switch (ch) {
case 'v':
verbose = 1;
break;
case 't':
change = 1;
strcpy(type, optarg);
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (!argc) {
fprintf(stderr, "No file(s) specified.\n");
exit(1);
}
while (argc) {
int fd;
char buffer[EI_NINDENT];
char string[(EI_NINDENT-EI_SPARE)+1];
if ((fd = open(argv[0], O_RDWR, 0)) < 0) {
fprintf(stderr, "No such file %s.\n", argv[0]);
goto fail;
}
if (read(fd, buffer, EI_NINDENT) < EI_NINDENT) {
fprintf(stderr, "File '%s' too short.\n", argv[0]);
goto fail;
}
if (buffer[0] != ELFMAG0 || buffer[1] != ELFMAG1 ||
buffer[2] != ELFMAG2 || buffer[3] != ELFMAG3) {
fprintf(stderr, "File '%s' is not ELF format.\n",
argv[0]);
goto fail;
}
if (!change) {
bzero(string, sizeof(string));
strncpy(string, &buffer[EI_SPARE], EI_NINDENT-EI_SPARE);
if (strlen(string)) {
fprintf(stdout, "File '%s' is of brand '%s'.\n",
argv[0], string);
}
else
fprintf(stdout, "File '%s' has no branding.\n",
argv[0]);
}
else {
strncpy(&buffer[EI_SPARE], type, EI_NINDENT-EI_SPARE);
lseek(fd, 0, SEEK_SET);
if (write(fd, buffer, EI_NINDENT) != EI_NINDENT) {
fprintf(stderr, "Error writing %s\n", argv[0]);
goto fail;
}
}
fail:
argc--;
argv++;
}
}
int
usage()
{
fprintf(stderr, "Usage: brandelf [-t string] file ...\n");
}
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