""

config/hostentp_ghba_r.c

@@ -0,0 +1,39 @@
+/*
+ * hostentp_ghba_r.c:
+ * Test program to see whether gethostbyaddr_r takes 7 arguments and returns
+ * struct hostent*. 
+ */
+
+static const char rcsid[] = "$Id$";
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <netinet/in.h>
+
+int main(void) {
+    struct in_addr localhost;
+    struct hostent hostbuf, *hp;
+    char *buf;
+    int herr;
+    size_t buflen = 1024;
+    
+    localhost.s_addr = htonl(INADDR_LOOPBACK);
+    buf = malloc(buflen);
+    while ((hp = gethostbyaddr_r((char*)&localhost, sizeof(struct in_addr),
+                                 AF_INET, &hostbuf, buf, buflen, &herr))
+                    == NULL
+           && errno == ERANGE)
+        buf = (char*)realloc(buf, buflen *= 2);
+        
+    /* We assume that the loopback address can always be resolved if
+     * gethostbyaddr_r is actually working. */
+    if (hp == NULL) {
+        fprintf(stderr, "errno = %d, herr = %d\n", errno, herr);
+        return -1;
+    } else
+        return 0;
+}