Blame src/internal/ptycon_open_impl.c

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/*********************************************************/
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/*  ptycon: a pty-console bridge                         */
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/*  Copyright (C) 2016  Z. Gilboa                        */
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/*  Released under GPLv2 and GPLv3; see COPYING.PTYCON.  */
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/*********************************************************/
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#include <psxtypes/psxtypes.h>
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#include <ntcon/ntcon.h>
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#include <ntapi/ntapi.h>
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#include <ptycon/ptycon.h>
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#include "ptycon_driver_impl.h"
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static int32_t ptyc_open(
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	void **		hfile,
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	void *		hat,
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	const char *	arg,
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	uint32_t	options,
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	bool		fprivate)
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{
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	int32_t						status;
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	nt_oa						oa;
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	nt_iosb						iosb;
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	nt_unicode_string				path;
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	nt_unicode_conversion_params_utf8_to_utf16	params = {0,0,0,0,0,0,0,0,0};
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	wchar16_t					buffer[4096];
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	wchar16_t *					wch;
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	size_t						nbytes;
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	/* utf-8 --> utf-16 */
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	params.src		= (const unsigned char *)arg;
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	params.src_size_in_bytes= ntapi->tt_string_null_offset_multibyte(arg);
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	params.dst		= buffer;
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	params.dst_size_in_bytes= sizeof(buffer);
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	if ((status = ntapi->uc_convert_unicode_stream_utf8_to_utf16(&params)))
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		return status;
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	/* convenience */
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	for (wch=buffer, nbytes=params.bytes_written; nbytes; ) {
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		if (*wch == '/')
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			*wch = '\\';
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		nbytes -= sizeof(wchar16_t);
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		wch++;
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	}
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	/* path */
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	path.maxlen = 0;
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	path.strlen = (uint16_t)params.bytes_written;
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	path.buffer = buffer;
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	/* oa */
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	oa.len      = sizeof(nt_oa);
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	oa.root_dir = (buffer[0]=='\\') ? 0 : hat;
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	oa.obj_name = &pat;;
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	oa.obj_attr = fprivate ? 0 : NT_OBJ_INHERIT;
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	oa.sec_desc = 0;
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	oa.sec_qos  = 0;
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	/* open */
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	return ntapi->zw_open_file(
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		hfile,
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		NT_SEC_SYNCHRONIZE | NT_FILE_READ_ATTRIBUTES | NT_FILE_READ_DATA,
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		&oa,&iosb,
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		NT_FILE_SHARE_READ | NT_FILE_SHARE_WRITE | NT_FILE_SHARE_DELETE,
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		options | NT_FILE_SYNCHRONOUS_IO_ALERT);
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}
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static int32_t ptyc_open_volume(
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	void **		hfile,
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	void *		hat,
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	const char *	arg,
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	uint32_t	options,
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	bool		fprivate)
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{
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	int32_t   status;
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	void *    hvolume = 0;
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	wchar16_t drive   = arg[0];
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	if ((arg[1]==':') && ((arg[2]=='\\') || (arg[2]=='/'))) {
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		if ((status = ntapi->tt_get_dos_drive_root_handle(
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				&hvolume,drive)))
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			return status;
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		hat = hvolume;
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		arg = &arg[3];
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	}
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	status = ptyc_open(
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		hfile,hat,arg,
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		options,fprivate);
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	if (hvolume)
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		ntapi->zw_close(hvolume);
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	return status;
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}
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int32_t ptyc_open_file(void ** hfile, void * hat, const char * arg, bool fprivate)
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{
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	return ptyc_open_volume(hfile,hat,arg,NT_FILE_NON_DIRECTORY_FILE,fprivate);
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}
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int32_t ptyc_open_dir(void ** hfile, void * hat, const char * arg, bool fprivate)
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{
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	return ptyc_open_volume(hfile,hat,arg,NT_FILE_DIRECTORY_FILE,fprivate);
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}