/*
 * mktemp.c
 *
 * Copyright (c) 2009 The MacPorts Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of The MacPorts Project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#if HAVE_CONFIG_H
#include <config.h>
#endif

#ifndef __APPLE__
/* required for strdup(3)/mkdtemp(3) on Linux */
/* hides mkdtemp(3) on OS X */
#define _XOPEN_SOURCE 700L
/* required for mktemp(3) if _XOPEN_SOURCE >= 600L on Linux */
#define _BSD_SOURCE
#endif

#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <tcl.h>

#include "mktemp.h"

int MkdtempCmd(ClientData clientData UNUSED, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])
{
	char *template, *sp;
	Tcl_Obj *tcl_result;

	if (objc != 2) {
		Tcl_WrongNumArgs(interp, 1, objv, "template");
		return TCL_ERROR;
	}

	template = strdup(Tcl_GetString(objv[1]));
	if (template == NULL)
		return TCL_ERROR;

	if ((sp = mkdtemp(template)) == NULL) {
		Tcl_AppendResult(interp, "mkdtemp failed: ", strerror(errno), NULL);
		free(template);
		return TCL_ERROR;
	}

	tcl_result = Tcl_NewStringObj(sp, -1);
	Tcl_SetObjResult(interp, tcl_result);
	free(template);
	return TCL_OK;
}

int MktempCmd(ClientData clientData UNUSED, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])
{
	char *template, *sp;
	Tcl_Obj *tcl_result;

	if (objc != 2) {
		Tcl_WrongNumArgs(interp, 1, objv, "template");
		return TCL_ERROR;
	}

	template = strdup(Tcl_GetString(objv[1]));
	if (template == NULL)
		return TCL_ERROR;

	if ((sp = mktemp(template)) == NULL) {
		Tcl_AppendResult(interp, "mktemp failed: ", strerror(errno), NULL);
		free(template);
		return TCL_ERROR;
	}

	tcl_result = Tcl_NewStringObj(sp, -1);
	Tcl_SetObjResult(interp, tcl_result);
	free(template);
	return TCL_OK;
}

int MkstempCmd(ClientData clientData UNUSED, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])
{
	Tcl_Channel channel;
	char *template, *channelname;
	int fd;

	if (objc != 2) {
		Tcl_WrongNumArgs(interp, 1, objv, "template");
		return TCL_ERROR;
	}

	template = strdup(Tcl_GetString(objv[1]));
	if (template == NULL)
		return TCL_ERROR;

	if ((fd = mkstemp(template)) < 0) {
		Tcl_AppendResult(interp, "mkstemp failed: ", strerror(errno), NULL);
		free(template);
		return TCL_ERROR;
	}

	channel = Tcl_MakeFileChannel((ClientData)(intptr_t)fd, TCL_READABLE|TCL_WRITABLE);
	Tcl_RegisterChannel(interp, channel);
	channelname = (char *)Tcl_GetChannelName(channel);
	Tcl_AppendResult(interp, channelname, " ", template, NULL);
	free(template);
	return TCL_OK;
}
