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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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20
tools/firmware-utils/src/addpattern.c
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@@ -58,6 +58,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
@@ -141,6 +142,20 @@ void usage(void)
exit(EXIT_FAILURE);
}
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);
}
}
}
struct board_info *find_board(char *id)
{
struct board_info *board;
@@ -273,7 +288,10 @@ int main(int argc, char **argv)
usage();
}
if (time(&t) == (time_t)(-1)) {
set_source_date_epoch();
if (source_date_epoch != -1) {
t = source_date_epoch;
} else if ((time(&t) == (time_t)(-1))) {
fprintf(stderr, "time call failed\n");
return EXIT_FAILURE;
}