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tmp.c revision 1.10 
      1 /*	$NetBSD: tmp.c,v 1.10 2003/08/07 11:15:55 agc Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Peter McIlroy.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  */
     34 
     35 #include <ctype.h>
     36 
     37 #ifndef lint
     38 __RCSID("$NetBSD: tmp.c,v 1.10 2003/08/07 11:15:55 agc Exp $");
     39 __SCCSID("@(#)tmp.c	8.1 (Berkeley) 6/6/93");
     40 #endif /* not lint */
     41 
     42 #include <sys/param.h>
     43 
     44 #include <err.h>
     45 #include <errno.h>
     46 #include <limits.h>
     47 #include <signal.h>
     48 #include <stdio.h>
     49 #include <stdlib.h>
     50 #include <string.h>
     51 #include <unistd.h>
     52 
     53 #include "sort.h"
     54 #include "pathnames.h"
     55 
     56 #define _NAME_TMP "sort.XXXXXXXX"
     57 
     58 FILE *
     59 ftmp()
     60 {
     61 	sigset_t set, oset;
     62 	FILE *fp;
     63 	int fd;
     64 	char path[MAXPATHLEN];
     65 
     66 	(void)snprintf(path, sizeof(path), "%s%s%s", tmpdir,
     67 		       (tmpdir[strlen(tmpdir)-1] != '/') ? "/" : "", _NAME_TMP);
     68 
     69 	sigfillset(&set);
     70 	(void)sigprocmask(SIG_BLOCK, &set, &oset);
     71 	if ((fd = mkstemp(path)) < 0)
     72 		err(2, "ftmp: mkstemp(\"%s\")", path);
     73 	if (!(fp = fdopen(fd, "w+")))
     74 		err(2, "ftmp: fdopen(\"%s\")", path);
     75 	(void)unlink(path);
     76 
     77 	(void)sigprocmask(SIG_SETMASK, &oset, NULL);
     78 	return (fp);
     79 }
     80