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-rw-r--r--src/libs/libgroff/curtime.cpp55
1 files changed, 55 insertions, 0 deletions
diff --git a/src/libs/libgroff/curtime.cpp b/src/libs/libgroff/curtime.cpp
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--- /dev/null
+++ b/src/libs/libgroff/curtime.cpp
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+/* Copyright (C) 2015-2020 Free Software Foundation, Inc.
+
+This file is part of groff.
+
+groff is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+groff is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+The GNU General Public License version 2 (GPL2) is available in the
+internet at <http://www.gnu.org/licenses/gpl-2.0.txt>. */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "errarg.h"
+#include "error.h"
+
+#ifdef LONG_FOR_TIME_T
+long
+#else
+time_t
+#endif
+current_time()
+{
+ char *source_date_epoch = getenv("SOURCE_DATE_EPOCH");
+
+ if (source_date_epoch) {
+ errno = 0;
+ char *endptr;
+ long epoch = strtol(source_date_epoch, &endptr, 10);
+
+ if ((errno == ERANGE && (epoch == LONG_MAX || epoch == LONG_MIN)) ||
+ (errno != 0 && epoch == 0))
+ fatal("$SOURCE_DATE_EPOCH: strtol: %1", strerror(errno));
+ if (endptr == source_date_epoch)
+ fatal("$SOURCE_DATE_EPOCH: no digits found: '%1'", endptr);
+ if (*endptr != '\0')
+ fatal("$SOURCE_DATE_EPOCH: trailing garbage: '%1'", endptr);
+ return epoch;
+ } else
+ return time(0);
+}