Patrick Williams | c124f4f | 2015-09-15 14:41:29 -0500 | [diff] [blame] | 1 | From 64d856b243812907068776b204a003a3a8fa122a Mon Sep 17 00:00:00 2001 |
| 2 | From: Robert Yang <liezhi.yang@windriver.com> |
| 3 | Date: Wed, 31 Dec 2014 16:17:42 +0800 |
| 4 | Subject: [PATCH 3/9] linux/syslinux: implement install_to_ext2() |
| 5 | |
| 6 | * The handle_adv_on_ext() checks whether we only need update adv. |
| 7 | * The write_to_ext() installs files (ldlinux.sys or ldlinux.c32) to the |
| 8 | device. |
| 9 | * The install_bootblock() installs the boot block. |
| 10 | |
| 11 | Upstream-Status: Submitted |
| 12 | |
| 13 | Signed-off-by: Robert Yang <liezhi.yang@windriver.com> |
| 14 | Tested-by: Du Dolpher <dolpher.du@intel.com> |
| 15 | --- |
| 16 | linux/syslinux.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| 17 | 1 file changed, 79 insertions(+) |
| 18 | |
| 19 | diff --git a/linux/syslinux.c b/linux/syslinux.c |
| 20 | index cc4e7da..45f080d 100755 |
| 21 | --- a/linux/syslinux.c |
| 22 | +++ b/linux/syslinux.c |
| 23 | @@ -346,11 +346,90 @@ static int open_ext2_fs(const char *device, const char *subdir) |
| 24 | fail: |
| 25 | (void) ext2fs_close(e2fs); |
| 26 | return -1; |
| 27 | + |
| 28 | +} |
| 29 | + |
| 30 | +/* |
| 31 | + * Install the boot block on the specified device. |
| 32 | + * Must be run AFTER file installed. |
| 33 | + */ |
| 34 | +int install_bootblock(int fd, const char *device) |
| 35 | +{ |
| 36 | +} |
| 37 | + |
| 38 | +static int handle_adv_on_ext(void) |
| 39 | +{ |
| 40 | +} |
| 41 | + |
| 42 | +/* Write files, adv, boot sector */ |
| 43 | +static int write_to_ext(const char *filename, const char *str, int length, |
| 44 | + int i_flags, int dev_fd, const char *subdir) |
| 45 | +{ |
| 46 | } |
| 47 | |
| 48 | /* The install func for ext2, ext3 and ext4 */ |
| 49 | static int install_to_ext2(const char *device, int dev_fd, const char *subdir) |
| 50 | { |
| 51 | + int retval; |
| 52 | + ext2_ino_t oldino; |
| 53 | + |
| 54 | + const char *file = "ldlinux.sys"; |
| 55 | + const char *oldfile = "extlinux.sys"; |
| 56 | + const char *c32file = "ldlinux.c32"; |
| 57 | + |
| 58 | + /* Handle the adv */ |
| 59 | + if (handle_adv_on_ext() < 0) { |
| 60 | + fprintf(stderr, "%s: error while handling ADV on %s\n", |
| 61 | + program, device); |
| 62 | + retval = 1; |
| 63 | + goto fail; |
| 64 | + } |
| 65 | + |
| 66 | + /* Return if only need update the adv */ |
| 67 | + if (opt.update_only == -1) { |
| 68 | + return ext2fs_close(e2fs); |
| 69 | + } |
| 70 | + |
| 71 | + /* Write ldlinux.sys, adv, boot sector */ |
| 72 | + retval = write_to_ext(file, (const char _force *)boot_image, |
| 73 | + boot_image_len, EXT2_IMMUTABLE_FL, dev_fd, subdir); |
| 74 | + if (retval) { |
| 75 | + fprintf(stderr, "%s: ERROR: while writing: %s.\n", |
| 76 | + program, file); |
| 77 | + goto fail; |
| 78 | + } |
| 79 | + |
| 80 | + /* Write ldlinux.c32 */ |
| 81 | + retval = write_to_ext(c32file, |
| 82 | + (const char _force *)syslinux_ldlinuxc32, |
| 83 | + syslinux_ldlinuxc32_len, 0, dev_fd, subdir); |
| 84 | + if (retval) { |
| 85 | + fprintf(stderr, "%s: ERROR: while writing: %s.\n", |
| 86 | + program, c32file); |
| 87 | + goto fail; |
| 88 | + } |
| 89 | + |
| 90 | + /* Look if we have the extlinux.sys and remove it*/ |
| 91 | + retval = ext2fs_namei(e2fs, root, cwd, oldfile, &oldino); |
| 92 | + if (retval == 0) { |
| 93 | + retval = ext2fs_unlink(e2fs, cwd, oldfile, oldino, 0); |
| 94 | + if (retval) { |
| 95 | + fprintf(stderr, "%s: ERROR: failed to unlink: %s\n", |
| 96 | + program, oldfile); |
| 97 | + goto fail; |
| 98 | + } |
| 99 | + } else { |
| 100 | + retval = 0; |
| 101 | + } |
| 102 | + |
| 103 | + sync(); |
| 104 | + retval = install_bootblock(dev_fd, device); |
| 105 | + close(dev_fd); |
| 106 | + sync(); |
| 107 | + |
| 108 | +fail: |
| 109 | + (void) ext2fs_close(e2fs); |
| 110 | + return retval; |
| 111 | } |
| 112 | |
| 113 | int main(int argc, char *argv[]) |
| 114 | -- |
| 115 | 1.9.1 |
| 116 | |