Home | History | Annotate | Download | only in stdio
      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 /*	Copyright (c) 1988 AT&T */
     28 /*	  All Rights Reserved	*/
     29 
     30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     31 
     32 #include "lint.h"
     33 #include "mtlib.h"
     34 #include <sys/types.h>
     35 #include <stdio.h>
     36 #include <string.h>
     37 #include <stdlib.h>
     38 #include <errno.h>
     39 #include <thread.h>
     40 #include <synch.h>
     41 #include "tsd.h"
     42 
     43 static char seed[] = { 'a', 'a', 'a', '\0' };
     44 
     45 static mutex_t seed_lk = DEFAULTMUTEX;
     46 
     47 char *
     48 tmpnam_r(char *s)
     49 {
     50 	char *p = s, *q;
     51 
     52 	if (!s)
     53 		return (NULL);
     54 
     55 	(void) strcpy(p, P_tmpdir);
     56 	lmutex_lock(&seed_lk);
     57 	(void) strcat(p, seed);
     58 	(void) strcat(p, "XXXXXX");
     59 
     60 	q = seed;
     61 	while (*q == 'z')
     62 		*q++ = 'a';
     63 	if (*q != '\0')
     64 		++*q;
     65 	lmutex_unlock(&seed_lk);
     66 	(void) mktemp(p);
     67 	return (p);
     68 }
     69 
     70 char *
     71 tmpnam(char *s)
     72 {
     73 	if (s == NULL)
     74 		s = tsdalloc(_T_TMPNAM, L_tmpnam, NULL);
     75 	return (tmpnam_r(s));
     76 }
     77