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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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30
tools/firmware-utils/src/hcsmakeimage.c
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@@ -5,7 +5,8 @@
#include <string.h>
#include <getopt.h>
#include <unistd.h>
#include <sys/time.h>
#include <errno.h>
#include <time.h>
#include <sys/stat.h>
#include <libgen.h>
#include "bcmalgo.h"
@@ -42,6 +43,19 @@ static void print_help ( const char* ename )
printf ( "\n" );
}
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);
}
}
}
int main ( int argc, char** argv )
{
@@ -149,11 +163,19 @@ int main ( int argc, char** argv )
{
fname = filename;
}
struct timeval tm;
gettimeofday ( &tm,NULL );
time_t 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;
}
struct stat buf;
stat ( input,&buf );
ldr_header_t* head = construct_header ( magicnum, (uint16_t) majrev, (uint16_t) minrev, ( uint32_t ) tm.tv_sec, ( uint32_t ) buf.st_size, ldaddress, fname, get_file_crc ( input ) );
ldr_header_t* head = construct_header ( magicnum, (uint16_t) majrev, (uint16_t) minrev, ( uint32_t ) t, ( uint32_t ) buf.st_size, ldaddress, fname, get_file_crc ( input ) );
free(dupe);
//uint32_t magic, uint16_t rev_maj,uint16_t rev_min, uint32_t build_date, uint32_t filelen, uint32_t ldaddress, const char* filename, uint32_t crc
//FILE* fd = fopen ("/tftpboot/haxorware11rev32.bin","r");