ref: ce72cab0e49c08c71888c57cf616563b90d7497a
dir: /sys/src/cmd/gs/src/gdevpipe.c/
/* Copyright (C) 1993, 2000 Aladdin Enterprises. All rights reserved.
This software is provided AS-IS with no warranty, either express or
implied.
This software is distributed under license and may not be copied,
modified or distributed except as expressly authorized under the terms
of the license contained in the file LICENSE in this distribution.
For more information about licensing, please refer to
http://www.ghostscript.com/licensing/. For information on
commercial licensing, go to http://www.artifex.com/licensing/ or
contact Artifex Software, Inc., 101 Lucas Valley Road #110,
San Rafael, CA 94903, U.S.A., +1(415)492-9861.
*/
/* $Id: gdevpipe.c,v 1.6 2002/02/21 22:24:51 giles Exp $ */
/* %pipe% IODevice */
#include "errno_.h"
#include "pipe_.h"
#include "stdio_.h"
#include "string_.h"
#include "gserror.h"
#include "gserrors.h"
#include "gstypes.h"
#include "gsmemory.h" /* for gxiodev.h */
#include "gxiodev.h"
/* The pipe IODevice */
private iodev_proc_fopen(pipe_fopen);
private iodev_proc_fclose(pipe_fclose);
const gx_io_device gs_iodev_pipe = {
"%pipe%", "Special",
{iodev_no_init, iodev_no_open_device,
NULL /*iodev_os_open_file */ , pipe_fopen, pipe_fclose,
iodev_no_delete_file, iodev_no_rename_file, iodev_no_file_status,
iodev_no_enumerate_files, NULL, NULL,
iodev_no_get_params, iodev_no_put_params
}
};
/* The file device procedures */
private int
pipe_fopen(gx_io_device * iodev, const char *fname, const char *access,
FILE ** pfile, char *rfname, uint rnamelen)
{
errno = 0;
/*
* Some platforms allow opening a pipe with a '+' in the access
* mode, even though pipes are not positionable. Detect this here.
*/
if (strchr(access, '+'))
return_error(gs_error_invalidfileaccess);
/*
* The OSF/1 1.3 library doesn't include const in the
* prototype for popen, so we have to break const here.
*/
*pfile = popen((char *)fname, (char *)access);
if (*pfile == NULL)
return_error(gs_fopen_errno_to_code(errno));
if (rfname != NULL)
strcpy(rfname, fname);
return 0;
}
private int
pipe_fclose(gx_io_device * iodev, FILE * file)
{
pclose(file);
return 0;
}