2008-10-14 Wei Shen <cquark@gmail.com>

	* Makefile.am, preinstall.am, libcsupport/src/mknod.c,
	libcsupport/src/open.c, libcsupport/src/pipe.c, libfs/Makefile.am,
	libfs/preinstall.am, libfs/src/imfs/imfs.h,
	libfs/src/imfs/imfs_creat.c, libfs/src/imfs/imfs_debug.c,
	libfs/src/imfs/imfs_eval.c, libfs/src/imfs/imfs_initsupp.c,
	libfs/src/imfs/imfs_mknod.c, libfs/src/imfs/imfs_stat.c,
	libfs/src/imfs/memfile.c: Initial commit of POSIX pipe support.
	* libfs/src/imfs/imfs_fifo.c, libfs/src/pipe/fifo.c,
	libfs/src/pipe/pipe.c, libfs/src/pipe/pipe.h: New files.

3 files changed, 11 insertions, 6 deletions

diff --git a/cpukit/libcsupport/src/mknod.c b/cpukit/libcsupport/src/mknod.c
index c786c6d756..2d1db0fc3d 100644
--- a/cpukit/libcsupport/src/mknod.c
+++ b/cpukit/libcsupport/src/mknod.c
@@ -43,9 +43,6 @@ int mknod(
   if ( !(mode & (S_IFREG|S_IFCHR|S_IFBLK|S_IFIFO) ) )
     rtems_set_errno_and_return_minus_one( EINVAL );
 
-  if ( S_ISFIFO(mode) )
-    rtems_set_errno_and_return_minus_one( ENOTSUP );
-
   rtems_filesystem_get_start_loc( pathname, &i, &temp_loc );
 
   if ( !temp_loc.ops->evalformake_h ) {
diff --git a/cpukit/libcsupport/src/open.c b/cpukit/libcsupport/src/open.c
index e29427e568..1bc83ed7bc 100644
--- a/cpukit/libcsupport/src/open.c
+++ b/cpukit/libcsupport/src/open.c
@@ -164,8 +164,10 @@ int open(
   }
 
   rc = (*iop->handlers->open_h)( iop, pathname, flags, mode );
-  if ( rc )
+  if ( rc ) {
+    rc = errno;
     goto done;
+  }
 
   /*
    *  Optionally truncate the file.
diff --git a/cpukit/libcsupport/src/pipe.c b/cpukit/libcsupport/src/pipe.c
index 57a682e55b..ef8c820483 100644
--- a/cpukit/libcsupport/src/pipe.c
+++ b/cpukit/libcsupport/src/pipe.c
@@ -16,11 +16,17 @@
 #endif
 
 #include <errno.h>
+#include <sys/types.h>
+
+extern int pipe_create(int filsdes[2]);
 
 int pipe(
   int filsdes[2]
 )
 {
-  errno = ENOSYS;
-  return -1;
+  if (filsdes == NULL) {
+    errno = EFAULT;
+    return -1;
+  }
+  return pipe_create(filsdes);
 }