1 /* $NetBSD: mkstemp.c,v 1.1.1.1 2011/04/13 18:15:42 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 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 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <config.h> 37 38 #include <string.h> 39 #ifdef HAVE_UNISTD_H 40 #include <unistd.h> 41 #endif 42 #ifdef HAVE_FCNTL_H 43 #include <fcntl.h> 44 #endif 45 #include <errno.h> 46 47 #include <krb5/roken.h> 48 49 #ifndef HAVE_MKSTEMP 50 51 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 52 mkstemp(char *template) 53 { 54 int start, i; 55 pid_t val; 56 val = getpid(); 57 start = strlen(template) - 1; 58 while(template[start] == 'X') { 59 template[start] = '0' + val % 10; 60 val /= 10; 61 start--; 62 } 63 64 do{ 65 int fd; 66 fd = open(template, O_RDWR | O_CREAT | O_EXCL, 0600); 67 if(fd >= 0 || errno != EEXIST) 68 return fd; 69 i = start + 1; 70 do{ 71 if(template[i] == 0) 72 return -1; 73 template[i]++; 74 if(template[i] == '9' + 1) 75 template[i] = 'a'; 76 if(template[i] <= 'z') 77 break; 78 template[i] = 'a'; 79 i++; 80 }while(1); 81 }while(1); 82 } 83 84 #endif 85