From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Sat, 18 Feb 1995 01:27:10 +0000
Subject: initial import

---
 hurd/fopenport.c | 131 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 hurd/fopenport.c

(limited to 'hurd/fopenport.c')

diff --git a/hurd/fopenport.c b/hurd/fopenport.c
new file mode 100644
index 0000000000..5792b3e26e
--- /dev/null
+++ b/hurd/fopenport.c
@@ -0,0 +1,131 @@
+/* Copyright (C) 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 <ansidecl.h>
+#include <hurd.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <string.h>
+
+/* Read up to N chars into BUF from COOKIE.
+   Return how many chars were read, 0 for EOF or -1 for error.  */
+static ssize_t
+readio (void *cookie, char *buf, size_t n)
+{
+  mach_msg_type_number_t nread;
+  error_t err;
+  char *bufp = buf;
+
+  nread = n;
+  if (err = __io_read ((io_t) cookie, &bufp, &nread, -1, n))
+    return __hurd_fail (err);
+
+  if (bufp != buf)
+    {
+      memcpy (buf, bufp, nread);
+      __vm_deallocate (__mach_task_self (),
+		       (vm_address_t) bufp, (vm_size_t) nread);
+    }
+
+  return nread;
+}
+
+/* Write up to N chars from BUF to COOKIE.
+   Return how many chars were written or -1 for error.  */
+static ssize_t
+writeio (void *cookie, const char *buf, size_t n)
+{
+  mach_msg_type_number_t wrote;
+  error_t err;
+
+  if (err = __io_write ((io_t) cookie, buf, n, -1, &wrote))
+    return __hurd_fail (err);
+
+  return wrote;
+}
+
+/* Move COOKIE's file position *POS bytes, according to WHENCE.
+   The current file position is stored in *POS.
+   Returns zero if successful, nonzero if not.  */
+static int
+seekio (void *cookie, fpos_t *pos, int whence)
+{
+  error_t error = __io_seek ((file_t) cookie, *pos, whence, pos);
+  if (error)
+    return __hurd_fail (error);
+  return 0;
+}
+
+/* Close the file associated with COOKIE.
+   Return 0 for success or -1 for failure.  */
+static int
+closeio (void *cookie)
+{
+  error_t error = __mach_port_deallocate (__mach_task_self (),
+					  (mach_port_t) cookie);
+  if (error)
+    return __hurd_fail (error);
+  return 0;
+}
+
+static const __io_functions funcsio = { readio, writeio, seekio, closeio };
+
+
+/* Defined in fopen.c.  */
+extern int EXFUN(__getmode, (CONST char *mode, __io_mode *mptr));
+
+
+/* Open a stream on PORT.  MODE is as for fopen.  */
+
+FILE *
+__fopenport (mach_port_t port, const char *mode)
+{
+  register FILE *stream;
+  __io_mode m;
+  int pflags;
+  error_t err;
+
+  if (!__getmode (mode, &m))
+    return NULL;
+
+  /* Verify the PORT is valid allows the access MODE specifies.  */
+
+  if (err = __io_get_openmodes (port, &pflags))
+    return __hurd_fail (err), NULL;
+
+  /* Check the access mode.  */
+  if ((m.__read && !(pflags & O_READ)) || (m.__write && !(pflags & O_WRITE)))
+    {
+      errno = EBADF;
+      return NULL;
+    }
+
+  stream = __newstream ();
+  if (stream == NULL)
+    return NULL;
+
+  stream->__cookie = (PTR) port;
+  stream->__mode = m;
+  stream->__io_funcs = funcsio;
+  stream->__room_funcs = __default_room_functions;
+  stream->__seen = 1;
+
+  return stream;
+}
+
+weak_alias (__fopenport, fopenport)
-- 
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