Improve missing_d/getaddrinfo.[ch].

3 files changed, 20 insertions, 4 deletions

diff --git a/missing_d/ChangeLog b/missing_d/ChangeLog
index 70fbde64..89dbdb4d 100644
--- a/missing_d/ChangeLog
+++ b/missing_d/ChangeLog
@@ -1,3 +1,9 @@
+2015-02-27         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* getaddrinfo.h (gai_strerror): Add declaration.
+	* getaddrinfo.c (gai_strerror): New function.
+	(getaddrinfo): Return errno values instead of just -1.
+
 2014-04-08         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* 4.1.1: Release tar ball made.
diff --git a/missing_d/getaddrinfo.c b/missing_d/getaddrinfo.c
index 677f27d0..f24ac598 100644
--- a/missing_d/getaddrinfo.c
+++ b/missing_d/getaddrinfo.c
@@ -12,6 +12,8 @@
 #ifdef HAVE_ARPA_INET_H
 #include <arpa/inet.h>
 #endif
+#include <errno.h>
+#include <string.h>	/* strerror */
 
 #include "getaddrinfo.h"
 
@@ -29,12 +31,12 @@ getaddrinfo(const char *hostname, const char *portname,
 {
 	struct addrinfo *out;
 	if (res == NULL)
-		return -1;
+		return EINVAL;
 
 	out = (struct addrinfo *) malloc(sizeof(*out));
 	if (out == NULL) {
 		*res = NULL;
-		return -1;
+		return ENOMEM;
 	}
 	memset(out, '\0', sizeof(*out));
 
@@ -42,7 +44,7 @@ getaddrinfo(const char *hostname, const char *portname,
 	if (out->ai_addr == NULL) {
 		free(out);
 		*res = NULL;
-		return -1;
+		return ENOMEM;
 	}
 
 	out->ai_socktype = SOCK_STREAM;
@@ -78,7 +80,7 @@ getaddrinfo(const char *hostname, const char *portname,
 				= ((struct in_addr *)he->h_addr_list[0])->s_addr;
 		} else {
 			freeaddrinfo(out);
-			return -1;
+			return EADDRNOTAVAIL;
 		}
 	} else {
 		if (!(out->ai_flags & AI_PASSIVE))
@@ -109,4 +111,10 @@ getaddrinfo(const char *hostname, const char *portname,
 
 	return 0;
 }
+
+const char *
+gai_strerror(int errcode)
+{
+	return strerror(errcode);
+}
 #endif
diff --git a/missing_d/getaddrinfo.h b/missing_d/getaddrinfo.h
index 3d816c93..873d67df 100644
--- a/missing_d/getaddrinfo.h
+++ b/missing_d/getaddrinfo.h
@@ -29,3 +29,5 @@ void freeaddrinfo(struct xaddrinfo * res);
 
 int getaddrinfo(const char * hostname, const char * portname,
 	struct xaddrinfo * hints, struct xaddrinfo ** res);
+
+const char *gai_strerror(int errcode);