Add os_unsetenv()

[exim.git] / src / src / os.c

diff --git a/src/src/os.c b/src/src/os.c
index ee754f9f2689c44461aa56dad2f16cf72c05595f..d9ca589ee308f31c03e70073eb940f1b3fea8a56 100644 (file)
--- a/src/src/os.c
+++ b/src/src/os.c
@@ -833,9 +833,25 @@ os_get_dns_resolver_res(void)
 
 #endif /* OS_GET_DNS_RESOLVER_RES */
 
-
 /* ----------------------------------------------------------------------- */
 
+/***********************************************************
+*                 unsetenv()                               *
+***********************************************************/
+
+/* Most modern systems define int unsetenv(const char*),
+* some don't. */
+
+#if !defined(OS_UNSETENV)
+int
+os_unsetenv(const char *name)
+{
+  return unsetenv(name);
+}
+#endif
+
+
+/* ----------------------------------------------------------------------- */