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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 * 26 * Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T 27 * All Rights Reserved 28 * 29 * Portions of this source code were derived from Berkeley 30 * 4.3 BSD under license from the regents of the University of 31 * California. 32 */ 33 34 #pragma ident "%Z%%M% %I% %E% SMI" 35 36 #include <sys/feature_tests.h> 37 38 #if !defined(_LP64) && _FILE_OFFSET_BITS == 64 39 #pragma weak mkstemp64 = _mkstemp64 40 #define _mkstemp _mkstemp64 41 #else 42 #pragma weak mkstemp = _mkstemp 43 #endif 44 45 #include "synonyms.h" 46 #include <sys/fcntl.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <errno.h> 50 #include <alloca.h> 51 #include <sys/types.h> 52 #include <sys/stat.h> 53 #include <fcntl.h> 54 55 56 int 57 _mkstemp(char *as) 58 { 59 int fd; 60 char *tstr, *str, *mkret; 61 62 if (as == NULL || *as == NULL) 63 return (-1); 64 65 tstr = alloca(strlen(as) + 1); 66 (void) strcpy(tstr, as); 67 68 str = tstr + (strlen(tstr) - 1); 69 70 /* 71 * The following for() loop is doing work. mktemp() will generate 72 * a different name each time through the loop. So if the first 73 * name is used then keep trying until you find a free filename. 74 */ 75 76 for (; ; ) { 77 if (*str == 'X') { /* If no trailing X's don't call mktemp. */ 78 mkret = mktemp(as); 79 if (*mkret == '\0') { 80 return (-1); 81 } 82 } 83 #if _FILE_OFFSET_BITS == 64 84 if ((fd = open64(as, O_CREAT|O_EXCL|O_RDWR, 0600)) != -1) { 85 return (fd); 86 } 87 #else 88 if ((fd = open(as, O_CREAT|O_EXCL|O_RDWR, 0600)) != -1) { 89 return (fd); 90 } 91 #endif /* _FILE_OFFSET_BITS == 64 */ 92 93 /* 94 * If the error condition is other than EEXIST or if the 95 * file exists and there are no X's in the string 96 * return -1. 97 */ 98 99 if ((errno != EEXIST) || (*str != 'X')) { 100 return (-1); 101 } 102 (void) strcpy(as, tstr); 103 } 104 } 105