text: /*	$OpenBSD: tmp.c,v 1.9 2009/10/27 23:59:43 deraadt Exp $	*/
  
  /*-
   * Copyright (c) 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * This code is derived from software contributed to Berkeley by
   * Peter McIlroy.
   *
   * 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 University 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 REGENTS 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 REGENTS 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.
   */
  
  #include <sys/param.h>
  
  #include <err.h>
  #include <errno.h>
  #include <limits.h>
  #include <signal.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  
  #include "sort.h"
  #include "pathnames.h"
  
  #define _NAME_TMP "sort.XXXXXXXXXX"
  
  FILE *
  ftmp(void)
  {
  	sigset_t set, oset;
  	FILE *fp;
  	int fd;
  	char path[PATH_MAX];
  
  	if (tmpdir[0] == '\0')
  		errx(2, "invalid temporary directory: \"\"");
  	(void)snprintf(path, sizeof(path), "%s%s%s", tmpdir,
  		       (tmpdir[strlen(tmpdir)-1] != '/') ? "/" : "", _NAME_TMP);
  
  	sigfillset(&set);
  	(void)sigprocmask(SIG_BLOCK, &set, &oset);
  	if ((fd = mkstemp(path)) < 0)
  		err(2, "%s", path);
  	if (!(fp = fdopen(fd, "w+")))
  		err(2, "%s", path);
  	(void)unlink(path);
  
  	(void)sigprocmask(SIG_SETMASK, &oset, NULL);
  	return (fp);
  }
  