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authorA. Wilcox <AWilcox@Wilcox-Tech.com>2017-10-15 09:15:27 -0500
committerA. Wilcox <AWilcox@Wilcox-Tech.com>2017-10-15 09:15:27 -0500
commitd8f267afb5e7d036d0b23125e23b916336b19fa4 (patch)
treeee47d88d9ce279a12d6b972b902bef376f002951 /libgcompat
parentb611b59a18827dab641cdef54d2d998d36c7c7f6 (diff)
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resolv: new module
Diffstat (limited to 'libgcompat')
-rw-r--r--libgcompat/resolv.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/libgcompat/resolv.c b/libgcompat/resolv.c
new file mode 100644
index 0000000..9ded8c9
--- /dev/null
+++ b/libgcompat/resolv.c
@@ -0,0 +1,32 @@
+/* Original author: Khem Raj <raj.khem@gmail.com> */
+/***************************************************************************
+ * resolv_compat.h
+ *
+ * Mimick GLIBC's res_ninit() and res_nclose() for musl libc
+ * Note: res_init() is actually deprecated according to
+ * http://docs.oracle.com/cd/E36784_01/html/E36875/res-nclose-3resolv.html
+ **************************************************************************/
+#include <string.h> /* memcpy, memset */
+#include <resolv.h> /* res_state */
+
+static inline int res_ninit(res_state statp)
+{
+ int rc = res_init();
+ if (statp != &_res) {
+ memcpy(statp, &_res, sizeof(*statp));
+ }
+ return rc;
+}
+
+static inline int res_nclose(res_state statp)
+{
+ if (!statp)
+ return -1;
+ if (statp != &_res) {
+ memset(statp, 0, sizeof(*statp));
+ }
+ return 0;
+}
+
+extern __typeof(res_ninit) __res_ninit __attribute__((weak, alias("res_ninit")));
+extern __typeof(res_nclose) __res_nclose __attribute__((weak, alias("res_nclose")));