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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 20:46:53 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 20:46:53 +0000
commit19da58be2d9359a9641381feb559be0b918ef710 (patch)
tree109724175f07436696f51b14b5abbd3f4d704d6d /libmisc/gettime.c
parentInitial commit. (diff)
downloadshadow-19da58be2d9359a9641381feb559be0b918ef710.tar.xz
shadow-19da58be2d9359a9641381feb559be0b918ef710.zip
Adding upstream version 1:4.13+dfsg1.upstream/1%4.13+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'libmisc/gettime.c')
-rw-r--r--libmisc/gettime.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/libmisc/gettime.c b/libmisc/gettime.c
new file mode 100644
index 0000000..b288402
--- /dev/null
+++ b/libmisc/gettime.c
@@ -0,0 +1,68 @@
+/*
+ * SPDX-FileCopyrightText: 2017, Chris Lamb
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include "defines.h"
+#include "prototypes.h"
+#include "shadowlog.h"
+
+/*
+ * gettime() returns the time as the number of seconds since the Epoch
+ *
+ * Like time(), gettime() returns the time as the number of seconds since the
+ * Epoch, 1970-01-01 00:00:00 +0000 (UTC), except that if the SOURCE_DATE_EPOCH
+ * environment variable is exported it will use that instead.
+ */
+/*@observer@*/time_t gettime ()
+{
+ char *endptr;
+ char *source_date_epoch;
+ time_t fallback;
+ unsigned long long epoch;
+ FILE *shadow_logfd = log_get_logfd();
+
+ fallback = time (NULL);
+ source_date_epoch = shadow_getenv ("SOURCE_DATE_EPOCH");
+
+ if (!source_date_epoch)
+ return fallback;
+
+ errno = 0;
+ epoch = strtoull (source_date_epoch, &endptr, 10);
+ if ((errno == ERANGE && (epoch == ULLONG_MAX || epoch == 0))
+ || (errno != 0 && epoch == 0)) {
+ fprintf (shadow_logfd,
+ _("Environment variable $SOURCE_DATE_EPOCH: strtoull: %s\n"),
+ strerror(errno));
+ } else if (endptr == source_date_epoch) {
+ fprintf (shadow_logfd,
+ _("Environment variable $SOURCE_DATE_EPOCH: No digits were found: %s\n"),
+ endptr);
+ } else if (*endptr != '\0') {
+ fprintf (shadow_logfd,
+ _("Environment variable $SOURCE_DATE_EPOCH: Trailing garbage: %s\n"),
+ endptr);
+ } else if (epoch > ULONG_MAX) {
+ fprintf (shadow_logfd,
+ _("Environment variable $SOURCE_DATE_EPOCH: value must be smaller than or equal to %lu but was found to be: %llu\n"),
+ ULONG_MAX, epoch);
+ } else if (epoch > fallback) {
+ fprintf (shadow_logfd,
+ _("Environment variable $SOURCE_DATE_EPOCH: value must be smaller than or equal to the current time (%lu) but was found to be: %llu\n"),
+ fallback, epoch);
+ } else {
+ /* Valid */
+ return (time_t)epoch;
+ }
+
+ return fallback;
+}