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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/fopenport.c
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initial import
Diffstat (limited to 'hurd/fopenport.c')
-rw-r--r--hurd/fopenport.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/hurd/fopenport.c b/hurd/fopenport.c
new file mode 100644
index 0000000..5792b3e
--- /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)