Fix getifaddrs()

Names were not properly terminated

Fixes #72

Author: th-otto

socket/ifaddrs.c

@@ -112,7 +112,7 @@ int __getifaddrs(struct ifaddrs **ifap)
 		/* Now copy the information we already have from SIOCGIFCONF.  */
 		storage->ia.ifa_name = names;
 		strcpy(names, ifr->ifr_name);
-		names += strlen(names);
+		names += strlen(names) + 1;
 		storage->addr = ifr->ifr_addr;
 		storage->ia.ifa_addr = &storage->addr;
 

socket/test-ifaddrs.c

@@ -0,0 +1,38 @@
+#include <ifaddrs.h>
+#include <net/if.h>
+#include <stdio.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+int main(void)
+{
+	struct ifaddrs *ifap;
+	struct ifaddrs *ifa;
+	struct sockaddr_in *sa;
+	char *addr;
+
+	if (getifaddrs(&ifap) == -1)
+	{
+		perror("getifaddrs");
+		return 1;
+	}
+	for (ifa = ifap; ifa; ifa = ifa->ifa_next)
+	{
+		if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET)
+		{
+			sa = (struct sockaddr_in *) ifa->ifa_addr;
+			addr = inet_ntoa(sa->sin_addr);
+			printf("Interface: %s\tAddress: %s\n", ifa->ifa_name, addr);
+		}
+
+	}
+
+	freeifaddrs(ifap);
+	return 0;
+}