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From: Debian DNS Packaging <pkg-dns-devel@lists.alioth.debian.org>
Date: Fri, 24 Nov 2017 16:26:54 +0000
Subject: _reproducible_build
---
lib/dns/gen.c | 35 +++++++++++++++++++++++++++++++++--
1 file changed, 33 insertions(+), 2 deletions(-)
diff --git a/lib/dns/gen.c b/lib/dns/gen.c
index 2a3b94b..b26a509 100644
--- a/lib/dns/gen.c
+++ b/lib/dns/gen.c
@@ -32,6 +32,8 @@
#include <stdlib.h>
#include <string.h>
#include <time.h>
+#include <errno.h>
+#include <limits.h>
#ifdef WIN32
#include "gen-win32.h"
@@ -528,6 +530,9 @@ main(int argc, char **argv) {
char *prefix = NULL;
char *suffix = NULL;
char *file = NULL;
+ char *source_date_epoch;
+ unsigned long long epoch;
+ char *endptr;
isc_dir_t dir;
for (i = 0; i < TYPENAMES; i++)
@@ -618,8 +623,34 @@ main(int argc, char **argv) {
INSIST(n > 0 && (unsigned)n < sizeof(srcdir));
sd(0, "", buf, filetype);
- if (time(&now) != -1) {
- if ((tm = localtime(&now)) != NULL && tm->tm_year > 104) {
+ source_date_epoch = getenv("SOURCE_DATE_EPOCH");
+ if (source_date_epoch) {
+ errno = 0;
+ epoch = strtoull(source_date_epoch, &endptr, 10);
+ if ((errno == ERANGE && (epoch == ULLONG_MAX || epoch == 0))
+ || (errno != 0 && epoch == 0)) {
+ fprintf(stderr, "Environment variable $SOURCE_DATE_EPOCH: strtoull: %s\n", strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+ if (endptr == source_date_epoch) {
+ fprintf(stderr, "Environment variable $SOURCE_DATE_EPOCH: No digits were found: %s\n", endptr);
+ exit(EXIT_FAILURE);
+ }
+ if (*endptr != '\0') {
+ fprintf(stderr, "Environment variable $SOURCE_DATE_EPOCH: Trailing garbage: %s\n", endptr);
+ exit(EXIT_FAILURE);
+ }
+ if (epoch > ULONG_MAX) {
+ fprintf(stderr, "Environment variable $SOURCE_DATE_EPOCH: value must be smaller than or equal to: %lu but was found to be: %llu \n", ULONG_MAX, epoch);
+ exit(EXIT_FAILURE);
+ }
+ now = epoch;
+ } else {
+ time(&now);
+ }
+
+ if (now != -1) {
+ if ((tm = gmtime(&now)) != NULL && tm->tm_year > 104) {
n = snprintf(year, sizeof(year), "-%d",
tm->tm_year + 1900);
INSIST(n > 0 && (unsigned)n < sizeof(year));
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