132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
/* Copyright (C) 1994, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <hurd.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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/* Read up to N chars into BUF from COOKIE.
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Return how many chars were read, 0 for EOF or -1 for error. */
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static ssize_t
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readio (void *cookie, char *buf, size_t n)
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{
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mach_msg_type_number_t nread;
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error_t err;
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char *bufp = buf;
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nread = n;
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if (err = __io_read ((io_t) cookie, &bufp, &nread, -1, n))
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return __hurd_fail (err);
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if (bufp != buf)
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{
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memcpy (buf, bufp, nread);
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__vm_deallocate (__mach_task_self (),
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(vm_address_t) bufp, (vm_size_t) nread);
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}
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return nread;
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}
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/* Write up to N chars from BUF to COOKIE.
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Return how many chars were written or -1 for error. */
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static ssize_t
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writeio (void *cookie, const char *buf, size_t n)
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{
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mach_msg_type_number_t wrote;
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error_t err;
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if (err = __io_write ((io_t) cookie, buf, n, -1, &wrote))
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return __hurd_fail (err);
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return wrote;
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}
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/* Move COOKIE's file position *POS bytes, according to WHENCE.
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The current file position is stored in *POS.
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Returns zero if successful, nonzero if not. */
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static int
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seekio (void *cookie, fpos_t *pos, int whence)
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{
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error_t error = __io_seek ((file_t) cookie, *pos, whence, pos);
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if (error)
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return __hurd_fail (error);
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return 0;
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}
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/* Close the file associated with COOKIE.
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Return 0 for success or -1 for failure. */
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static int
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closeio (void *cookie)
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{
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error_t error = __mach_port_deallocate (__mach_task_self (),
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(mach_port_t) cookie);
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if (error)
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return __hurd_fail (error);
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return 0;
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}
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static const __io_functions funcsio = { readio, writeio, seekio, closeio };
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/* Defined in fopen.c. */
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extern int EXFUN(__getmode, (CONST char *mode, __io_mode *mptr));
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/* Open a stream on PORT. MODE is as for fopen. */
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FILE *
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__fopenport (mach_port_t port, const char *mode)
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{
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register FILE *stream;
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__io_mode m;
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int pflags;
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error_t err;
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if (!__getmode (mode, &m))
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return NULL;
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/* Verify the PORT is valid allows the access MODE specifies. */
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if (err = __io_get_openmodes (port, &pflags))
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return __hurd_fail (err), NULL;
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/* Check the access mode. */
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if ((m.__read && !(pflags & O_READ)) || (m.__write && !(pflags & O_WRITE)))
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{
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errno = EBADF;
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return NULL;
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}
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stream = __newstream ();
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if (stream == NULL)
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return NULL;
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stream->__cookie = (PTR) port;
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stream->__mode = m;
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stream->__io_funcs = funcsio;
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stream->__room_funcs = __default_room_functions;
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stream->__seen = 1;
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return stream;
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}
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weak_alias (__fopenport, fopenport)
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