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From 76c465e87312dbc6cffd05427f1f4d2ebdee4f13 Mon Sep 17 00:00:00 2001
From: Robert Yang <liezhi.yang@windriver.com>
Date: Fri, 2 Jan 2015 12:28:35 +0800
Subject: [PATCH 9/9] linux/syslinux: implement install_bootblock()
Refer to the install_bootblock() in extlinux/main.c to make
linux/syslinux.c's install_bootblock() which only supports ext2/3/4.
Upstream-Status: Submitted
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Tested-by: Du Dolpher <dolpher.du@intel.com>
---
linux/syslinux.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/linux/syslinux.c b/linux/syslinux.c
index c741750..917f83a 100755
--- a/linux/syslinux.c
+++ b/linux/syslinux.c
@@ -419,6 +419,26 @@ static int ext_file_write(ext2_file_t e2_file, const void *buf, size_t count,
*/
int install_bootblock(int fd, const char *device)
{
+ struct ext2_super_block sb;
+
+ if (xpread(fd, &sb, sizeof sb, EXT2_SUPER_OFFSET + opt.offset) != sizeof sb) {
+ perror("reading superblock");
+ return 1;
+ }
+
+ if (sb.s_magic != EXT2_SUPER_MAGIC) {
+ fprintf(stderr,
+ "no ext2/3/4 superblock found on %s\n", device);
+ return 1;
+ }
+
+ if (xpwrite(fd, syslinux_bootsect, syslinux_bootsect_len, 0)
+ != (signed)syslinux_bootsect_len) {
+ perror("writing bootblock");
+ return 1;
+ }
+
+ return 0;
}
/* The file's block count */
--
1.9.1
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