From 3d921155e0a761f61c8f1ec37328724aee1e2eda Mon Sep 17 00:00:00 2001
From: Chris Lamb <chris@chris-lamb.co.uk>
Date: Sun, 31 Mar 2019 15:59:45 +0100
Subject: [PATCH] gettime: Use secure_getenv over getenv.

---
 README            | 1 +
 configure.ac      | 3 +++
 lib/defines.h     | 6 ++++++
 libmisc/gettime.c | 2 +-
 4 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/README b/README
index 952ac578..26cfff1e 100644
--- a/README
+++ b/README
@@ -51,6 +51,7 @@ Brian R. Gaeke <brg@dgate.org>
 Calle Karlsson <ckn@kash.se>
 Chip Rosenthal <chip@unicom.com>
 Chris Evans <lady0110@sable.ox.ac.uk>
+Chris Lamb <chris@chris-lamb.co.uk>
 Cristian Gafton <gafton@sorosis.ro>
 Dan Walsh <dwalsh@redhat.com>
 Darcy Boese <possum@chardonnay.niagara.com>
diff --git a/configure.ac b/configure.ac
index da236722..a738ad66 100644
--- a/configure.ac
+++ b/configure.ac
@@ -110,6 +110,9 @@ AC_REPLACE_FUNCS(sgetgrent sgetpwent sgetspent)
 AC_REPLACE_FUNCS(snprintf strcasecmp strdup strerror strstr)
 
 AC_CHECK_FUNC(setpgrp)
+AC_CHECK_FUNC(secure_getenv, [AC_DEFINE(HAS_SECURE_GETENV,
+                                        1,
+                                        [Defined to 1 if you have the declaration of 'secure_getenv'])])
 
 if test "$ac_cv_header_shadow_h" = "yes"; then
 	AC_CACHE_CHECK(for working shadow group support,
diff --git a/lib/defines.h b/lib/defines.h
index cded1417..2fb1b56e 100644
--- a/lib/defines.h
+++ b/lib/defines.h
@@ -382,4 +382,10 @@ extern char *strerror ();
 # endif
 #endif
 
+#ifdef HAVE_SECURE_GETENV
+#  define shadow_getenv(name) secure_getenv(name)
+# else
+#  define shadow_getenv(name) getenv(name)
+#endif
+
 #endif				/* _DEFINES_H_ */
diff --git a/libmisc/gettime.c b/libmisc/gettime.c
index 53eaf516..0e25a4b7 100644
--- a/libmisc/gettime.c
+++ b/libmisc/gettime.c
@@ -52,7 +52,7 @@
 	unsigned long long epoch;
 
 	fallback = time (NULL);
-	source_date_epoch = getenv ("SOURCE_DATE_EPOCH");
+	source_date_epoch = shadow_getenv ("SOURCE_DATE_EPOCH");
 
 	if (!source_date_epoch)
 		return fallback;