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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /hurd/fd-read.c
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initial import
Diffstat (limited to 'hurd/fd-read.c')
-rw-r--r--hurd/fd-read.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/hurd/fd-read.c b/hurd/fd-read.c
new file mode 100644
index 0000000..842066c
--- /dev/null
+++ b/hurd/fd-read.c
@@ -0,0 +1,49 @@
+/* Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <errno.h>
+#include <unistd.h>
+#include <hurd.h>
+#include <hurd/fd.h>
+#include <string.h>
+
+error_t
+_hurd_fd_read (struct hurd_fd *fd, void *buf, size_t *nbytes)
+{
+ error_t err;
+ char *data;
+ mach_msg_type_number_t nread;
+
+ error_t readfd (io_t port)
+ {
+ return __io_read (port, &data, &nread, -1, *nbytes);
+ }
+
+ data = buf;
+ if (err = HURD_FD_PORT_USE (fd, _hurd_ctty_input (port, ctty, readfd)))
+ return err;
+
+ if (data != buf)
+ {
+ memcpy (buf, data, nread);
+ __vm_deallocate (__mach_task_self (), (vm_address_t) data, nread);
+ }
+
+ *nbytes = nread;
+ return 0;
+}