- djm@cvs.openbsd.org 2010/01/30 02:54:53

[openssh.git] / monitor_fdpass.c

diff --git a/monitor_fdpass.c b/monitor_fdpass.c
index f68c3728a40338f4da332557e01b7b1d2ddbb15e..7eb6f5c6e1f3ffe7a561a0bd48ef65d9deccadb0 100644 (file)
--- a/monitor_fdpass.c
+++ b/monitor_fdpass.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: monitor_fdpass.c,v 1.17 2008/03/24 16:11:07 deraadt Exp $ */
+/* $OpenBSD: monitor_fdpass.c,v 1.19 2010/01/12 00:58:25 djm Exp $ */
 /*
  * Copyright 2001 Niels Provos <provos@citi.umich.edu>
  * All rights reserved.
@@ -34,6 +34,9 @@
 #endif
 
 #include <errno.h>
+#ifdef HAVE_POLL_H
+#include <poll.h>
+#endif
 #include <string.h>
 #include <stdarg.h>
 
@@ -55,6 +58,7 @@ mm_send_fd(int sock, int fd)
        struct iovec vec;
        char ch = '\0';
        ssize_t n;
+       struct pollfd pfd;
 
        memset(&msg, 0, sizeof(msg));
 #ifdef HAVE_ACCRIGHTS_IN_MSGHDR
@@ -75,7 +79,14 @@ mm_send_fd(int sock, int fd)
        msg.msg_iov = &vec;
        msg.msg_iovlen = 1;
 
-       if ((n = sendmsg(sock, &msg, 0)) == -1) {
+       pfd.fd = sock;
+       pfd.events = POLLOUT;
+       while ((n = sendmsg(sock, &msg, 0)) == -1 &&
+           (errno == EAGAIN || errno == EINTR)) {
+               debug3("%s: sendmsg(%d): %s", __func__, fd, strerror(errno));
+               (void)poll(&pfd, 1, -1);
+       }
+       if (n == -1) {
                error("%s: sendmsg(%d): %s", __func__, fd,
                    strerror(errno));
                return -1;
@@ -109,6 +120,7 @@ mm_receive_fd(int sock)
        ssize_t n;
        char ch;
        int fd;
+       struct pollfd pfd;
 
        memset(&msg, 0, sizeof(msg));
        vec.iov_base = &ch;
@@ -123,7 +135,14 @@ mm_receive_fd(int sock)
        msg.msg_controllen = sizeof(cmsgbuf.buf);
 #endif
 
-       if ((n = recvmsg(sock, &msg, 0)) == -1) {
+       pfd.fd = sock;
+       pfd.events = POLLIN;
+       while ((n = recvmsg(sock, &msg, 0)) == -1 &&
+           (errno == EAGAIN || errno == EINTR)) {
+               debug3("%s: recvmsg: %s", __func__, strerror(errno));
+               (void)poll(&pfd, 1, -1);
+       }
+       if (n == -1) {
                error("%s: recvmsg: %s", __func__, strerror(errno));
                return -1;
        }