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/*
* addrsize.c
* Generate initrd.addrsize file for s390x platforms.
* Takes an integer argument and writes out the binary representation of
* that value to the initrd.addrsize file.
* https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=197773
* https://bugzilla.redhat.com/show_bug.cgi?id=546422
*
* Copyright (C) 2007-2010 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <libgen.h>
int main(int argc,char **argv) {
char *cmd = basename(argv[0]);
char *address = NULL, *input = NULL, *output = NULL;
struct stat initrd_stat;
unsigned int addr = 0, size = 0, zero = 0;
int fd, rc;
mode_t mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH;
if (argc != 4) {
printf("Generate initrd address and size file used by the .ins LPAR load mechanism\n");
printf("Usage: %s [address] [initrd] [output file]\n", cmd);
printf("Example: %s 0x02000000 initrd.img initrd.addrsize\n", cmd);
return 1;
}
address = argv[1];
input = argv[2];
output = argv[3];
rc = stat(input, &initrd_stat);
if (rc) {
perror("Error getting initrd stats ");
return 2;
}
addr = htonl(strtoul(address, NULL, 0));
size = htonl(initrd_stat.st_size);
fd = open(output, O_CREAT | O_RDWR, mode);
if (write(fd, &zero, sizeof(int)) == -1) {
perror("writing initrd.addr (zero) ");
return 3;
}
if (write(fd, &addr, sizeof(int)) == -1) {
perror("writing initrd.addr (addr) ");
return 4;
}
if (write(fd, &zero, sizeof(int)) == -1) {
perror("writing initrd.addr (zero) ");
return 5;
}
if (write(fd, &size, sizeof(int)) == -1) {
perror("writing initrd.addr (size) ");
return 6;
}
close(fd);
return EXIT_SUCCESS;
}
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