Patrick Williams | c124f4f | 2015-09-15 14:41:29 -0500 | [diff] [blame] | 1 | From 76c465e87312dbc6cffd05427f1f4d2ebdee4f13 Mon Sep 17 00:00:00 2001 |
| 2 | From: Robert Yang <liezhi.yang@windriver.com> |
| 3 | Date: Fri, 2 Jan 2015 12:28:35 +0800 |
| 4 | Subject: [PATCH 9/9] linux/syslinux: implement install_bootblock() |
| 5 | |
| 6 | Refer to the install_bootblock() in extlinux/main.c to make |
| 7 | linux/syslinux.c's install_bootblock() which only supports ext2/3/4. |
| 8 | |
| 9 | Upstream-Status: Submitted |
| 10 | |
| 11 | Signed-off-by: Robert Yang <liezhi.yang@windriver.com> |
| 12 | Tested-by: Du Dolpher <dolpher.du@intel.com> |
| 13 | --- |
| 14 | linux/syslinux.c | 20 ++++++++++++++++++++ |
| 15 | 1 file changed, 20 insertions(+) |
| 16 | |
| 17 | diff --git a/linux/syslinux.c b/linux/syslinux.c |
| 18 | index c741750..917f83a 100755 |
| 19 | --- a/linux/syslinux.c |
| 20 | +++ b/linux/syslinux.c |
| 21 | @@ -419,6 +419,26 @@ static int ext_file_write(ext2_file_t e2_file, const void *buf, size_t count, |
| 22 | */ |
| 23 | int install_bootblock(int fd, const char *device) |
| 24 | { |
| 25 | + struct ext2_super_block sb; |
| 26 | + |
| 27 | + if (xpread(fd, &sb, sizeof sb, EXT2_SUPER_OFFSET + opt.offset) != sizeof sb) { |
| 28 | + perror("reading superblock"); |
| 29 | + return 1; |
| 30 | + } |
| 31 | + |
| 32 | + if (sb.s_magic != EXT2_SUPER_MAGIC) { |
| 33 | + fprintf(stderr, |
| 34 | + "no ext2/3/4 superblock found on %s\n", device); |
| 35 | + return 1; |
| 36 | + } |
| 37 | + |
| 38 | + if (xpwrite(fd, syslinux_bootsect, syslinux_bootsect_len, 0) |
| 39 | + != (signed)syslinux_bootsect_len) { |
| 40 | + perror("writing bootblock"); |
| 41 | + return 1; |
| 42 | + } |
| 43 | + |
| 44 | + return 0; |
| 45 | } |
| 46 | |
| 47 | /* The file's block count */ |
| 48 | -- |
| 49 | 1.9.1 |
| 50 | |