/* * BK Id: SCCS/s.mksimage.c 1.7 10/11/01 11:59:05 trini *//* * * * * */#include <stdio.h>#include <string.h>#include <stdlib.h>#include <stdarg.h>#include <sys/types.h>#include <fcntl.h>#include <unistd.h>#include <errno.h>#define SIZE 1024#define BLOCK_ALIGN(x)  (((x)+SIZE-1)&(~(SIZE-1)))static voiddie(const char *fmt, ...){	va_list args;	va_start(args, fmt);	vfprintf(stderr, fmt, args);	fputc('\n', stderr);	exit(1);}static voidusage(void){	printf("Usage: mkbinimg <bootstrap> <kernel> <ramdisk> -o <binary>\n");	exit(1);}static intcopy_blocks(int ifd, int ofd, unsigned long *offset, unsigned long *size){	off_t cur;	int amt;	unsigned long len = 0;	char buffer[SIZE];	cur = lseek(ofd, 0, SEEK_CUR);	if (cur % SIZE) {		cur = BLOCK_ALIGN(cur);		cur = lseek(ofd, cur, SEEK_SET);	}	*offset = (unsigned long) cur;	while((amt = read(ifd, buffer, SIZE)) > 0) {		write(ofd, buffer, amt);		len += amt;	}	*size = len;	return 0;}intmain(int argc, char *argv[]){	char *kernel, *loader, *rdimage = NULL;	unsigned long ld_off, kern_off, rd_off;	unsigned long ld_size, kern_size, rd_size;	int fd, ofd, len;	char buffer[500];	if (argc < 5 && !strcmp(argv[argc-2], "-o"))		usage();	if (argc > 5)		rdimage = argv[3];	kernel = argv[2];	loader = argv[1];	ofd = open(argv[argc-1], (O_RDWR|O_CREAT), 0755);	if (ofd < 0) {		die("can't open %s: %s", argv[5], strerror(errno));	}	ld_off = kern_off = rd_off = 0;	ld_size = kern_size = rd_size = 0;	memset(buffer, 0, 500);	len = 0;	fd = open(loader, O_RDONLY);	if (fd < 0) 		die("can't open loader: %s", strerror(errno));	copy_blocks(fd, ofd, &ld_off, &ld_size);	len = sprintf(buffer, "bootloader: %lx %lx\n", ld_off, ld_size);	close(fd);	fd = open(kernel, O_RDONLY);	if (fd < 0)		die("can't open kernel: %s", strerror(errno));	copy_blocks(fd, ofd, &kern_off, &kern_size);	len += sprintf(buffer+len, "zimage: %lx %lx\n", kern_off, kern_size);	close(fd);		if (rdimage) {		fd = open(rdimage, O_RDONLY);		if (fd < 0)			die("can't get ramdisk: %s", strerror(errno));				copy_blocks(fd, ofd, &rd_off, &rd_size);		close(fd);	}	len += sprintf(buffer+len, "initrd: %lx %lx", rd_off, rd_size);	close(ofd);	printf("%s\n", buffer);	return 0;}