* exceptions.cc (handle_sigsuspend): Force pending signal delivery before

waiting for signals to happen.
* signal.cc (sleep): Force pending signal delivery before sleeping.
(usleep): Ditto.
(signal): Force pending signal delivery before manipulating signal stuff.
(sigprocmask): Ditto.
(kill_worker): Ditto.
(abort): Ditto.
(sigaction): Ditto.
* syscalls.cc (readv): Force pending signal delivery before I/O.
(writev): Ditto.
(open): Ditto.
* net.cc: Ditto, throughout.
* sigproc.cc (sig_dispatch_pending): Deliver any pending signals prior to
returning.
* tty.cc (tty::make_pipes): Increase pipe buffer size.

winsup/cygwin/net.cc

@@ -576,6 +576,7 @@ cygwin_sendto (int fd, const void *buf, int len, int flags,
 	       const struct sockaddr *to, int tolen)
 {
   int res;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
 
   fhandler_socket *fh = get (fd);
@@ -599,6 +600,7 @@ cygwin_recvfrom (int fd, void *buf, int len, int flags,
 		 struct sockaddr *from, int *fromlen)
 {
   int res;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
 
   fhandler_socket *fh = get (fd);
@@ -755,6 +757,7 @@ extern "C" int
 cygwin_connect (int fd, const struct sockaddr *name, int namelen)
 {
   int res;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
 
   fhandler_socket *fh = get (fd);
@@ -843,6 +846,7 @@ static struct servent *servent_buf = NULL;
 extern "C" struct servent *
 cygwin_getservbyname (const char *name, const char *proto)
 {
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
   if (check_null_str_errno (name)
       || (proto != NULL && check_null_str_errno (proto)))
@@ -861,6 +865,7 @@ cygwin_getservbyname (const char *name, const char *proto)
 extern "C" struct servent *
 cygwin_getservbyport (int port, const char *proto)
 {
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
   if (proto != NULL && check_null_str_errno (proto))
     return NULL;
@@ -879,6 +884,7 @@ cygwin_gethostname (char *name, size_t len)
 {
   int PASCAL win32_gethostname (char *, int);
 
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
   if (__check_null_invalid_struct_errno (name, len))
     return -1;
@@ -961,6 +967,7 @@ cygwin_gethostbyname (const char *name)
   static char *tmp_addr_list[2];
   static int a, b, c, d;
 
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
   if (check_null_str_errno (name))
     return NULL;
@@ -1001,6 +1008,7 @@ cygwin_gethostbyname (const char *name)
 extern "C" struct hostent *
 cygwin_gethostbyaddr (const char *addr, int len, int type)
 {
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
   if (__check_invalid_read_ptr_errno (addr, len))
     return NULL;
@@ -1025,6 +1033,7 @@ extern "C" int
 cygwin_accept (int fd, struct sockaddr *peer, int *len)
 {
   int res;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
 
   fhandler_socket *fh = get (fd);
@@ -1045,6 +1054,7 @@ extern "C" int
 cygwin_bind (int fd, const struct sockaddr *my_addr, int addrlen)
 {
   int res;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
   fhandler_socket *fh = get (fd);
 
@@ -1062,6 +1072,7 @@ extern "C" int
 cygwin_getsockname (int fd, struct sockaddr *addr, int *namelen)
 {
   int res;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
 
   fhandler_socket *fh = get (fd);
@@ -1082,6 +1093,7 @@ extern "C" int
 cygwin_listen (int fd, int backlog)
 {
   int res;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
   fhandler_socket *fh = get (fd);
 
@@ -1099,6 +1111,7 @@ extern "C" int
 cygwin_shutdown (int fd, int how)
 {
   int res;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
 
   fhandler_socket *fh = get (fd);
@@ -1164,6 +1177,7 @@ extern "C" int
 cygwin_getpeername (int fd, struct sockaddr *name, int *len)
 {
   int res;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
 
   fhandler_socket *fh = get (fd);
@@ -1204,6 +1218,7 @@ getdomainname (char *domain, size_t len)
    * in use and include paths for the Domain name in each ?
    * Punt for now and assume MS-TCP on Win95.
    */
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
   if (__check_null_invalid_struct_errno (domain, len))
     return -1;
@@ -1798,6 +1813,7 @@ get_ifconf (struct ifconf *ifc, int what)
   unsigned long lip, lnp;
   struct sockaddr_in *sa;
 
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
   if (check_null_invalid_struct_errno (ifc))
     return -1;
@@ -1875,6 +1891,7 @@ cygwin_rcmd (char **ahost, unsigned short inport, char *locuser,
 {
   int res = -1;
   SOCKET fd2s;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
 
   if (check_null_invalid_struct_errno (ahost) ||
@@ -1919,6 +1936,7 @@ extern "C" int
 cygwin_rresvport (int *port)
 {
   int res;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
 
   if (check_null_invalid_struct_errno (port))
@@ -1950,6 +1968,7 @@ cygwin_rexec (char **ahost, unsigned short inport, char *locuser,
 {
   int res = -1;
   SOCKET fd2s;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
 
   if (check_null_invalid_struct_errno (ahost) ||
@@ -1998,6 +2017,7 @@ socketpair (int family, int type, int protocol, int *sb)
   cygheap_fdnew sb0;
   fhandler_socket *fh;
 
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
   if (__check_null_invalid_struct_errno (sb, 2 * sizeof (int)))
     return -1;
@@ -2197,6 +2217,7 @@ extern "C" int
 cygwin_recvmsg (int fd, struct msghdr *msg, int flags)
 {
   int res;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
 
   fhandler_socket *fh = get (fd);
@@ -2223,6 +2244,7 @@ extern "C" int
 cygwin_sendmsg (int fd, const struct msghdr *msg, int flags)
 {
   int res;
+  sig_dispatch_pending (0);
   sigframe thisframe (mainthread);
 
   fhandler_socket *fh = get (fd);