1 /* 2 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <config.h> 35 36 #include <string.h> 37 #ifdef HAVE_UNISTD_H 38 #include <unistd.h> 39 #endif 40 #ifdef HAVE_FCNTL_H 41 #include <fcntl.h> 42 #endif 43 #include <errno.h> 44 45 #include <roken.h> 46 47 #ifndef HAVE_MKSTEMP 48 49 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 50 mkstemp(char *template) 51 { 52 int start, i; 53 pid_t val; 54 val = getpid(); 55 start = strlen(template) - 1; 56 while(template[start] == 'X') { 57 template[start] = '0' + val % 10; 58 val /= 10; 59 start--; 60 } 61 62 do{ 63 int fd; 64 fd = open(template, O_RDWR | O_CREAT | O_EXCL, 0600); 65 if(fd >= 0 || errno != EEXIST) 66 return fd; 67 i = start + 1; 68 do{ 69 if(template[i] == 0) 70 return -1; 71 template[i]++; 72 if(template[i] == '9' + 1) 73 template[i] = 'a'; 74 if(template[i] <= 'z') 75 break; 76 template[i] = 'a'; 77 i++; 78 }while(1); 79 }while(1); 80 } 81 82 #endif 83