diff options
| author | Matthew Dempsky <matthew@cvs.openbsd.org> | 2013-04-03 19:38:21 +0000 |
|---|---|---|
| committer | Matthew Dempsky <matthew@cvs.openbsd.org> | 2013-04-03 19:38:21 +0000 |
| commit | 2242e7212f8ad589e0917bd6c82e52df96be126b (patch) | |
| tree | e3a177293a36d2871af4cf874a8d7c24b3f44240 /lib/libc | |
| parent | a8e583250be6a24fa75a5f8c04928c58356f91a6 (diff) | |
Use MSG_NOSIGNAL when writing DNS queries over TCP sockets to ensure
we don't trigger SIGPIPE.
ok millert
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/asr/res_send_async.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/lib/libc/asr/res_send_async.c b/lib/libc/asr/res_send_async.c index 9f16aa4338b..e8457c26bc5 100644 --- a/lib/libc/asr/res_send_async.c +++ b/lib/libc/asr/res_send_async.c @@ -1,4 +1,4 @@ -/* $OpenBSD: res_send_async.c,v 1.13 2013/04/02 21:57:33 eric Exp $ */ +/* $OpenBSD: res_send_async.c,v 1.14 2013/04/03 19:38:20 matthew Exp $ */ /* * Copyright (c) 2012 Eric Faurot <eric@openbsd.org> * @@ -516,6 +516,7 @@ udp_recv(struct async *as) static int tcp_write(struct async *as) { + struct msghdr msg; struct iovec iov[2]; uint16_t len; ssize_t n; @@ -552,7 +553,11 @@ tcp_write(struct async *as) iov[i].iov_len = as->as.dns.obuflen - offset; i++; - n = writev(as->as_fd, iov, i); + memset(&msg, 0, sizeof msg); + msg.msg_iov = iov; + msg.msg_iovlen = i; + + n = sendmsg(as->as_fd, &msg, MSG_NOSIGNAL); if (n == -1) goto close; /* errno set */ |