1 files changed, 75 insertions, 0 deletions
diff --git a/plugins/sudoers/gmtoff.c b/plugins/sudoers/gmtoff.c
new file mode 100644
index 0000000..dcf4489
--- /dev/null
+++ b/plugins/sudoers/gmtoff.c
@@ -0,0 +1,75 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2017 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <time.h>
+
+#include "sudo_compat.h"
+#include "sudoers_debug.h"
+#include "parse.h"
+
+/*
+ * Returns the offset from GMT in seconds (algorithm taken from sendmail).
+ * Warning: clobbers the static storage used by localtime() and gmtime().
+ */
+#ifdef HAVE_STRUCT_TM_TM_GMTOFF
+long
+get_gmtoff(time_t *when)
+{
+	struct tm *local;
+
+	local = localtime(when);
+	return local->tm_gmtoff;
+}
+#else
+long
+get_gmtoff(time_t *when)
+{
+	struct tm *gm, gmt, *local;
+	long offset;
+
+	if ((gm = gmtime(when)) == NULL)
+	    return 0;
+	gmt = *gm;
+	if ((local = localtime(when)) == NULL)
+	    return 0;
+
+	offset = (local->tm_sec - gmt.tm_sec) +
+	    ((local->tm_min - gmt.tm_min) * 60) +
+	    ((local->tm_hour - gmt.tm_hour) * 3600);
+
+	/* Timezone may cause year rollover to happen on a different day. */
+	if (local->tm_year < gmt.tm_year)
+		offset -= 24 * 3600;
+	else if (local->tm_year > gmt.tm_year)
+		offset -= 24 * 3600;
+	else if (local->tm_yday < gmt.tm_yday)
+		offset -= 24 * 3600;
+	else if (local->tm_yday > gmt.tm_yday)
+		offset += 24 * 3600;
+
+	return offset;
+}
+#endif /* HAVE_TM_GMTOFF */