patch for st-1.5.0: st_recvmsg/st_sendmsg

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For my project I need to transfer file descriptors between applications
and the example from Stevens book uses recvmsg()/sendmsg(), hence
I added those two function to statethreads. The patch is attached.
Would it make sense to add this to the distribution or is it just
overhead that other people don't need?

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diff -u -w -r st-1.5.0/common.h statethreads/common.h
--- st-1.5.0/common.h	Sun Jan 11 14:18:15 2004
+++ statethreads/common.h	Fri Jan 16 13:58:05 2004
@@ -352,7 +354,10 @@
 #define ST_DEFAULT_STACK_SIZE (128*1024)  /* Includes register stack size */
 #endif
 #define ST_KEYS_MAX 16
+/* XXX increase this? to avoid malloc() failure later on? */
+#ifndef ST_MIN_POLLFDS_SIZE
 #define ST_MIN_POLLFDS_SIZE 64
+#endif /* ST_MIN_POLLFDS_SIZE */
 
 
 /*****************************************
diff -u -w -r st-1.5.0/io.c statethreads/io.c
--- st-1.5.0/io.c	Thu Mar 28 21:09:08 2002
+++ statethreads/io.c	Wed Apr  9 10:57:24 2003
@@ -633,6 +635,45 @@
 
   return n;
 }
+
+int st_recvmsg(_st_netfd_t *fd, struct msghdr *msg, int flags,
+		st_utime_t timeout)
+{
+  int n;
+
+  while ((n = recvmsg(fd->osfd, msg, flags))
+	 < 0) {
+    if (errno == EINTR)
+      continue;
+    if (!_IO_NOT_READY_ERROR)
+      return -1;
+    /* Wait until the socket becomes readable */
+    if (st_netfd_poll(fd, POLLIN, timeout) < 0)
+      return -1;
+  }
+
+  return n;
+}
+
+
+int st_sendmsg(_st_netfd_t *fd, const struct msghdr *msg, int flags,
+	      st_utime_t timeout)
+{
+  int n;
+
+  while ((n = sendmsg(fd->osfd, msg, flags)) < 0) {
+    if (errno == EINTR)
+      continue;
+    if (!_IO_NOT_READY_ERROR)
+      return -1;
+    /* Wait until the socket becomes writable */
+    if (st_netfd_poll(fd, POLLOUT, timeout) < 0)
+      return -1;
+  }
+
+  return n;
+}
+
 
 
 /*
diff -u -w -r st-1.5.0/public.h statethreads/public.h
--- st-1.5.0/public.h	Thu Mar 28 21:09:08 2002
+++ statethreads/public.h	Wed Apr  9 10:57:24 2003
@@ -154,6 +156,11 @@
 extern int st_sendto(st_netfd_t fd, const void *msg, int len,
 		     const struct sockaddr *to, int tolen, st_utime_t timeout);
 extern st_netfd_t st_open(const char *path, int oflags, mode_t mode);
+
+extern int st_recvmsg(st_netfd_t fd, struct msghdr *msg, int flags,
+		st_utime_t timeout);
+extern int st_sendmsg(st_netfd_t fd, const struct msghdr *msg, int flags,
+	      st_utime_t timeout);
 
 #ifdef DEBUG
 extern void _st_show_thread_stack(st_thread_t thread, const char *messg);

--/9DWx/yDrRhgMJTb--


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