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firmware-utils: honor env SOURCE_DATE_EPOCH

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Use the timestamp from the enviroment SOURCE_DATE_EPOCH
if set instead of the build time.
Fixes reproducible builds for certain firmware images.

Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
This commit is contained in:
Alexander Couzens
2017-06-18 02:21:21 +02:00
parent 77dc6a2ae7
commit c47a1a3527
9 changed files with 86 additions and 12 deletions
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19
tools/firmware-utils/src/tplink-safeloader.c
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@@ -709,6 +709,20 @@ static void free_image_partition(struct image_partition_entry entry) {
free(entry.data);
}
static time_t source_date_epoch = -1;
static void set_source_date_epoch() {
char *env = getenv("SOURCE_DATE_EPOCH");
char *endptr = env;
errno = 0;
if (env && *env) {
source_date_epoch = strtoull(env, &endptr, 10);
if (errno || (endptr && *endptr != '\0')) {
fprintf(stderr, "Invalid SOURCE_DATE_EPOCH");
exit(1);
}
}
}
/** Generates the partition-table partition */
static struct image_partition_entry make_partition_table(const struct flash_partition_entry *p) {
struct image_partition_entry entry = alloc_image_partition("partition-table", 0x800);
@@ -752,7 +766,9 @@ static struct image_partition_entry make_soft_version(uint32_t rev) {
time_t t;
if (time(&t) == (time_t)(-1))
if (source_date_epoch != -1)
t = source_date_epoch;
else if (time(&t) == (time_t)(-1))
error(1, errno, "time");
struct tm *tm = localtime(&t);
@@ -1105,6 +1121,7 @@ int main(int argc, char *argv[]) {
bool add_jffs2_eof = false, sysupgrade = false;
unsigned rev = 0;
const struct device_info *info;
set_source_date_epoch();
while (true) {
int c;