switch to using socketpair instead of pipe if possible. This fixes the

[rsync/rsync.git] / util.c

diff --git a/util.c b/util.c
index 4382300..a0e2707 100644 (file)
--- a/util.c
+++ b/util.c
@@ -26,6 +26,18 @@
 
 extern int verbose;
 
+/* create a file descriptor - like pipe() but use socketpair if
+   possible (because of blocking issues on pipes */
+int fd_pair(int fd[2])
+{
+#if HAVE_SOCKETPAIR
+       return socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
+#else
+       return pipe(fd);
+#endif
+}
+
+
 /* this is taken from CVS */
 int piped_child(char **command,int *f_in,int *f_out)
 {
@@ -33,8 +45,8 @@ int piped_child(char **command,int *f_in,int *f_out)
   int to_child_pipe[2];
   int from_child_pipe[2];
 
-  if (pipe(to_child_pipe) < 0 ||
-      pipe(from_child_pipe) < 0) {
+  if (fd_pair(to_child_pipe) < 0 ||
+      fd_pair(from_child_pipe) < 0) {
     rprintf(FERROR,"pipe: %s\n",strerror(errno));
     exit_cleanup(RERR_IPC);
   }
@@ -83,8 +95,8 @@ int local_child(int argc, char **argv,int *f_in,int *f_out)
        int to_child_pipe[2];
        int from_child_pipe[2];
 
-       if (pipe(to_child_pipe) < 0 ||
-           pipe(from_child_pipe) < 0) {
+       if (fd_pair(to_child_pipe) < 0 ||
+           fd_pair(from_child_pipe) < 0) {
                rprintf(FERROR,"pipe: %s\n",strerror(errno));
                exit_cleanup(RERR_IPC);
        }