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--- mtools/syslinux.c.orig 2009-10-06 02:06:06.000000000 +0400
+++ mtools/syslinux.c 2009-12-04 11:18:37.000000000 +0300
@@ -38,6 +38,8 @@
#include "syslinux.h"
#include "libfat.h"
+int verbose=0;
+
char *program; /* Name of program */
char *device; /* Device to install to */
pid_t mypid;
@@ -123,6 +125,53 @@
return xpread(pp, buf, secsize, offset);
}
+/*
+ * load a file to be used as boot image
+ */
+static int load_boot_image(const char *name)
+{
+ int l, fd;
+ struct stat sb;
+ unsigned char *buf;
+
+ memset(&sb, 0, sizeof(sb));
+ fd = open(name, O_RDONLY);
+ if (fd < 0) {
+ fprintf(stderr, "cannot open boot image %s\n", name);
+ return 1;
+ }
+ if (fstat(fd, &sb)) {
+ fprintf(stderr, "cannot stat boot image %s\n", name);
+ return 1;
+ }
+ if ( (sb.st_mode & S_IFREG) == 0) {
+ fprintf(stderr, "boot image %s is not a file 0x%x\n", name, sb.st_mode);
+ return 1;
+ }
+ if (sb.st_size < 1024 || sb.st_size > 0x8000) {
+ fprintf(stderr, "boot image %s bad size %lld\n", name, sb.st_size);
+ return 1;
+ }
+ buf = calloc(1, sb.st_size);
+ if (buf == NULL) {
+ fprintf(stderr, "malloc failed for boot image %s\n", name);
+ return 1;
+ }
+ l = read(fd, buf, sb.st_size);
+ if (l != sb.st_size) {
+ fprintf(stderr, "read failed for boot image %s got %d\n", name, l);
+ return 1;
+ }
+ if (buf[0] != 0xeb || buf[0x200] != 0x0d) {
+ fprintf(stderr, "bad content for boot image %s\n", name);
+ return 1;
+ }
+ syslinux_bootsect = buf;
+ syslinux_ldlinux = buf + 512;
+ syslinux_ldlinux_len = sb.st_size - 512;
+ return 0;
+}
+
int main(int argc, char *argv[])
{
static unsigned char sectbuf[512];
@@ -160,6 +209,10 @@
while (*opt) {
if (*opt == 's') {
stupid = 1;
+ } else if ( *opt == 'v' ) {
+ verbose++;
+ } else if ( *opt == 'b' && argp[1] ) {
+ load_boot_image(*++argp);
} else if (*opt == 'r') {
raid_mode = 1;
} else if (*opt == 'f') {
@@ -220,11 +273,10 @@
fprintf(mtc,
/* "MTOOLS_NO_VFAT=1\n" */
"MTOOLS_SKIP_CHECK=1\n" /* Needed for some flash memories */
- "drive s:\n"
- " file=\"/proc/%lu/fd/%d\"\n"
+ "drive s: file=\"%s\"\n"
" offset=%llu\n",
(unsigned long)mypid,
- dev_fd, (unsigned long long)filesystem_offset);
+ device, (unsigned long long)filesystem_offset);
fclose(mtc);
/*
@@ -236,8 +288,10 @@
}
/* This command may fail legitimately */
+ if (verbose) fprintf(stderr, "doing mattrib\n");
system("mattrib -h -r -s s:/ldlinux.sys 2>/dev/null");
+ if (verbose) fprintf(stderr, "doing mcopy\n");
mtp = popen("mcopy -D o -D O -o - s:/ldlinux.sys", "w");
if (!mtp || (fwrite(syslinux_ldlinux, 1, syslinux_ldlinux_len, mtp)
!= syslinux_ldlinux_len) ||
@@ -249,7 +303,9 @@
* Now, use libfat to create a block map
*/
fs = libfat_open(libfat_xpread, dev_fd);
+ if (verbose) fprintf(stderr, "libfat_open returns %p\n", fs);
ldlinux_cluster = libfat_searchdir(fs, 0, "LDLINUX SYS", NULL);
+ if (verbose) fprintf(stderr, "libfat_searchdir returns %d\n", ldlinux_cluster);
secp = sectors;
nsectors = 0;
s = libfat_clustertosector(fs, ldlinux_cluster);
@@ -257,6 +313,7 @@
*secp++ = s;
nsectors++;
s = libfat_nextsector(fs, s);
+ if (verbose) fprintf(stderr, "libfat_nextsector returns %d\n", s);
}
libfat_close(fs);
|
