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 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 * 25 * Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T 26 * All Rights Reserved 27 * 28 * Portions of this source code were derived from Berkeley 29 * 4.3 BSD under license from the regents of the University of 30 * California. 31 */ 32 33 #pragma ident "%Z%%M% %I% %E% SMI" 34 35 #include <sys/feature_tests.h> 36 37 #if !defined(_LP64) && _FILE_OFFSET_BITS == 64 38 #pragma weak mkstemp64 = _mkstemp64 39 #pragma weak mkstemps64 = _mkstemps64 40 #define _mkstemp _mkstemp64 41 #define _mkstemps _mkstemps64 42 #define libc_mkstemps libc_mkstemps64 /* prefer unique statics */ 43 #else 44 #pragma weak mkstemp = _mkstemp 45 #pragma weak mkstemps = _mkstemps 46 #endif 47 48 #include "synonyms.h" 49 #include <sys/fcntl.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <errno.h> 53 #include <alloca.h> 54 #include <sys/types.h> 55 #include <sys/stat.h> 56 #include <fcntl.h> 57 58 extern char *libc_mktemps(char *, int); 59 60 static int 61 libc_mkstemps(char *as, int slen) 62 { 63 int fd; 64 int len; 65 char *tstr, *str, *mkret; 66 67 if (as == NULL || *as == NULL) 68 return (-1); 69 70 len = (int)strlen(as); 71 tstr = alloca(len + 1); 72 (void) strcpy(tstr, as); 73 74 if (slen < 0 || slen >= len) 75 return (-1); 76 77 str = tstr + (len - 1 - slen); 78 79 /* 80 * The following for() loop is doing work. mktemp() will generate 81 * a different name each time through the loop. So if the first 82 * name is used then keep trying until you find a free filename. 83 */ 84 85 for (; ; ) { 86 if (*str == 'X') { /* If no trailing X's don't call mktemp. */ 87 mkret = libc_mktemps(as, slen); 88 if (*mkret == '\0') { 89 return (-1); 90 } 91 } 92 #if _FILE_OFFSET_BITS == 64 93 if ((fd = open64(as, O_CREAT|O_EXCL|O_RDWR, 0600)) != -1) { 94 return (fd); 95 } 96 #else 97 if ((fd = open(as, O_CREAT|O_EXCL|O_RDWR, 0600)) != -1) { 98 return (fd); 99 } 100 #endif /* _FILE_OFFSET_BITS == 64 */ 101 102 /* 103 * If the error condition is other than EEXIST or if the 104 * file exists and there are no X's in the string 105 * return -1. 106 */ 107 108 if ((errno != EEXIST) || (*str != 'X')) { 109 return (-1); 110 } 111 (void) strcpy(as, tstr); 112 } 113 } 114 115 int 116 _mkstemp(char *as) 117 { 118 return (libc_mkstemps(as, 0)); 119 } 120 121 int 122 _mkstemps(char *as, int slen) 123 { 124 return (libc_mkstemps(as, slen)); 125 } 126