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#include <sys/types.h>
#include <asm/console.h>
#include "system.h"
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include "netwrap.h"
#include "bootloader.h"
char *tfn="netboot.img", *kfn="vmlinux.gz", *ifn=NULL, *barg=NULL;
char *progname;
void print_usage(void )
{
printf("Following shows options and default values or example value\n");
printf("%s -t netboot.img -k vmlinux.gz -i initrd.gz -a \"root=/dev/hda1 single\"\n", progname);
exit(1);
}
void open_file(char *fn, int *fd, int *sz)
{
struct stat buf;
*fd = open(fn, O_RDONLY);
if (fd < 0) {
fprintf(stderr, "%s: Cannot open %s\n", progname, fn);
print_usage();
exit(1);
}
fstat(*fd, &buf);
if (buf.st_size <= 10*1024) {
fprintf(stderr, "%s:Is this a right file %s, size = %d\n", progname, fn, (int)buf.st_size);
print_usage();
exit(1);
}
*sz = buf.st_size;
}
void append_file(int tfd, int sfd)
{
char buf[4096];
int red;
while ((red=read(sfd, buf, 4096)))
write(tfd, buf, red);
}
int main(int argc, char **argv)
{
int tfd=0, kfd=0, ifd=0, ksz=0, isz=0;
struct header hdr;
char *stmp;
progname=argv[0];
/*
* Read switches.
*/
for (argc--, argv++; argc > 0; argc--, argv++) {
if (argv[0][0] != '-')
break;
switch (argv[0][1]) {
case 't': /* override target file name */
if (argv[0][2]) {
stmp = &(argv[0][2]);
} else {
argc--;
argv++;
stmp = argv[0];
}
if (!stmp) {
fprintf(stderr,
"%s: missing file name for target\n",progname);
break;
}
tfn = stmp;
break;
case 'k': /* override kernel name */
if (argv[0][2]) {
stmp = &(argv[0][2]);
} else {
argc--;
argv++;
stmp = argv[0];
}
if (!stmp) {
fprintf(stderr,
"%s: missing file name for kernel\n",progname);
break;
}
kfn = stmp;
break;
case 'i': /* override file name for initrd */
if (argv[0][2]) {
stmp = &(argv[0][2]);
} else {
argc--;
argv++;
stmp = argv[0];
}
if (!stmp) {
fprintf(stderr,
"%s: missing file name for initial RAM-disk\n",progname);
break;
}
ifn = stmp;
break;
case 'a': /* add kernel parameters */
if (argv[0][2]) {
stmp = &(argv[0][2]);
} else {
argc--;
argv++;
stmp = argv[0];
}
if (!stmp) {
fprintf(stderr,
"%s: No kernel parameters specified\n",progname);
break;
}
barg = stmp;
break;
default:
fprintf(stderr, "%s: unknown switch: -%c\n",
progname, argv[0][1]);
print_usage();
break;
} /* switch */
} /* for args */
open_file(kfn, &kfd, &ksz);
if (ifn)
open_file(ifn, &ifd, &isz);
printf("Target file name is %s\n", tfn);
unlink(tfn);
tfd = open(tfn, O_RDWR|O_CREAT, 0644);
write(tfd, bootloader, sizeof(bootloader));
hdr.header_size = sizeof(int)*3;
hdr.kern_size = ksz;
hdr.ird_size = isz;
if (barg) printf("With kernel arguments : %s \n", barg);
else printf("Without kernel argument\n");
if (barg) {
if (strlen(barg) >= 200) {
printf("Kernel argument-list is too long\n");
exit(1);
}
strncpy(hdr.boot_arg, barg, strlen(barg)+1);
hdr.header_size += strlen(barg)+1;
}
lseek(tfd, align_512(sizeof(bootloader)), SEEK_SET);
write(tfd, &hdr, hdr.header_size);
printf("Binding kernel %s\n", kfn);
lseek(tfd, align_512((unsigned long)lseek(tfd, 0, SEEK_CUR)), SEEK_SET);
append_file(tfd, kfd);
if (ifn) {
printf("Binding initrd %s\n", ifn);
lseek(tfd, align_512((unsigned long)lseek(tfd, 0, SEEK_CUR)), SEEK_SET);
append_file(tfd, ifd);
}
close(tfd);
printf("Done.\n");
return 0;
}
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