check return value from socket call

SCCS-vsn: lib/libc/net/res_send.c 6.24

diff --git a/usr/src/lib/libc/net/res_send.c b/usr/src/lib/libc/net/res_send.c
index 194e289..4d447fe 100644 (file)
--- a/usr/src/lib/libc/net/res_send.c
+++ b/usr/src/lib/libc/net/res_send.c
@@ -16,7 +16,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)

-static char sccsid[] = "@(#)res_send.c 6.23 (Berkeley) %G%";
+static char sccsid[] = "@(#)res_send.c 6.24 (Berkeley) %G%";

 #endif /* LIBC_SCCS and not lint */
 
 /*
 #endif /* LIBC_SCCS and not lint */
 
 /*


@@ -105,7 +105,7 @@ res_send(buf, buflen, answer, anslen)
                                        terrno = errno;
 #ifdef DEBUG
                                        if (_res.options & RES_DEBUG)
                                        terrno = errno;
 #ifdef DEBUG
                                        if (_res.options & RES_DEBUG)

-                                           perror("socket failed");
+                                           perror("socket (vc) failed");

 #endif DEBUG
                                        continue;
                                }
 #endif DEBUG
                                        continue;
                                }


@@ -217,8 +217,17 @@ res_send(buf, buflen, answer, anslen)
                        /*
                         * Use datagrams.
                         */
                        /*
                         * Use datagrams.
                         */

-                       if (s < 0)
+                       if (s < 0) {

                                s = socket(AF_INET, SOCK_DGRAM, 0);
                                s = socket(AF_INET, SOCK_DGRAM, 0);

+                               if (s < 0) {
+                                       terrno = errno;
+#ifdef DEBUG
+                                       if (_res.options & RES_DEBUG)
+                                           perror("socket (dg) failed");
+#endif DEBUG
+                                       continue;
+                               }
+                       }

 #if    BSD >= 43
                        /*
                         * I'm tired of answering this question, so:
 #if    BSD >= 43
                        /*
                         * I'm tired of answering this question, so: