usr/src/lib/libc/port/gen/mkdtemp.c

   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 (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 /*
  27  * mkdtemp(3C) - create a directory with a unique name.
  28  */
  29
  30 #include "lint.h"
  31 #include <errno.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <sys/stat.h>
  35
  36 char *
  37 mkdtemp(char *template)
  38 {
  39         char *t;
  40         char *r;
  41
  42         /* Save template */
  43         t = strdupa(template);
  44         for (;;) {
  45                 r = mktemp(template);
  46
  47                 if (*r == '\0')
  48                         return (NULL);
  49
  50                 if (mkdir(template, 0700) == 0)
  51                         return (r);
  52
  53                 /* Other errors indicate persistent conditions. */
  54                 if (errno != EEXIST)
  55                         return (NULL);
  56
  57                 /* Reset template */
  58                 (void) strcpy(template, t);
  59         }
  60 }