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util/grub-mkstandalone: Ensure stable timestamps for generated images

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This change mirrors a previous fix [1] but is specific to images
generated by grub-mkstandalone.

The former fix, commit 85a7be241 (util/mkimage: Use stable timestamp
when generating binaries.), focused on utilizing a stable timestamp
during binary generation in the util/mkimage context. This commit
extends that approach to the images produced by grub-mkstandalone,
ensuring consistency and stability in timestamps across all generated
binaries.

[1] 85a7be241 util/mkimage: Use stable timestamp when generating binaries.

Signed-off-by: Michael Chang <mchang@suse.com>
Signed-off-by: Bernhard Wiedemann <bwiedemann@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Michael Chang 2023-12-06 11:42:03 +08:00 committed by Daniel Kiper
parent 069cc46c96
commit ed74bc3764
1 changed files with 5 additions and 5 deletions
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10
util/grub-mkstandalone.c
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@ -30,6 +30,9 @@
#pragma GCC diagnostic error "-Wmissing-prototypes"
#pragma GCC diagnostic error "-Wmissing-declarations"
/* use 2015-01-01T00:00:00+0000 as a stock timestamp */
#define STABLE_EMBEDDING_TIMESTAMP 1420070400
static char *output_image;
static char **files;
static int nfiles;
@ -184,7 +187,6 @@ add_tar_file (const char *from,
struct head hd;
grub_util_fd_t in;
ssize_t r;
grub_uint32_t mtime = 0;
grub_uint32_t size;
COMPILE_TIME_ASSERT (sizeof (hd) == 512);
@ -192,8 +194,6 @@ add_tar_file (const char *from,
if (grub_util_is_special_file (from))
return;
mtime = grub_util_get_mtime (from);
optr = tcn = xmalloc (strlen (to) + 1);
for (iptr = to; *iptr == '/'; iptr++);
for (; *iptr; iptr++)
@ -234,7 +234,7 @@ add_tar_file (const char *from,
memcpy (hd.gid, "0001750", 7);
set_tar_value (hd.size, optr - tcn, 12);
set_tar_value (hd.mtime, mtime, 12);
set_tar_value (hd.mtime, STABLE_EMBEDDING_TIMESTAMP, 12);
hd.typeflag = 'L';
memcpy (hd.magic, MAGIC, sizeof (hd.magic));
memcpy (hd.uname, "grub", 4);
@ -264,7 +264,7 @@ add_tar_file (const char *from,
memcpy (hd.gid, "0001750", 7);
set_tar_value (hd.size, size, 12);
set_tar_value (hd.mtime, mtime, 12);
set_tar_value (hd.mtime, STABLE_EMBEDDING_TIMESTAMP, 12);
hd.typeflag = '0';
memcpy (hd.magic, MAGIC, sizeof (hd.magic));
memcpy (hd.uname, "grub", 4);