1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 30*0Sstevel@tonic-gate /* All Rights Reserved */ 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate /* 34*0Sstevel@tonic-gate * tmpfile - return a pointer to an update file that can be 35*0Sstevel@tonic-gate * used for scratch. The file will automatically 36*0Sstevel@tonic-gate * go away if the program using it terminates. 37*0Sstevel@tonic-gate */ 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate #include "synonyms.h" 40*0Sstevel@tonic-gate #include "mtlib.h" 41*0Sstevel@tonic-gate #include <sys/types.h> 42*0Sstevel@tonic-gate #include <unistd.h> 43*0Sstevel@tonic-gate #include <stdio.h> 44*0Sstevel@tonic-gate #include <string.h> 45*0Sstevel@tonic-gate #include <stdlib.h> 46*0Sstevel@tonic-gate #include <thread.h> 47*0Sstevel@tonic-gate #include <synch.h> 48*0Sstevel@tonic-gate #include <sys/stat.h> 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate static char seed[] = { 'a', 'a', 'a', '\0' }; 51*0Sstevel@tonic-gate static mutex_t seed_lk = DEFAULTMUTEX; 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate #define XS "\bXXXXXX" /* a '\b' character is prepended to this */ 54*0Sstevel@tonic-gate /* string to avoid conflicts with names */ 55*0Sstevel@tonic-gate /* generated by tmpnam() */ 56*0Sstevel@tonic-gate /*ARGSUSED*/ 57*0Sstevel@tonic-gate static FILE * 58*0Sstevel@tonic-gate _common(boolean_t large_file) 59*0Sstevel@tonic-gate { 60*0Sstevel@tonic-gate char tfname[L_tmpnam]; 61*0Sstevel@tonic-gate FILE *p; 62*0Sstevel@tonic-gate char *q; 63*0Sstevel@tonic-gate int mkret; 64*0Sstevel@tonic-gate mode_t current_umask; 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate (void) strcpy(tfname, P_tmpdir); 67*0Sstevel@tonic-gate lmutex_lock(&seed_lk); 68*0Sstevel@tonic-gate (void) strcat(tfname, seed); 69*0Sstevel@tonic-gate (void) strcat(tfname, XS); 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate q = seed; 72*0Sstevel@tonic-gate while (*q == 'z') 73*0Sstevel@tonic-gate *q++ = 'a'; 74*0Sstevel@tonic-gate if (*q != '\0') 75*0Sstevel@tonic-gate ++*q; 76*0Sstevel@tonic-gate lmutex_unlock(&seed_lk); 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate #if !defined(_LP64) 79*0Sstevel@tonic-gate if (large_file == B_TRUE) { 80*0Sstevel@tonic-gate if ((mkret = mkstemp64(tfname)) == -1) 81*0Sstevel@tonic-gate return (NULL); 82*0Sstevel@tonic-gate } else 83*0Sstevel@tonic-gate #endif 84*0Sstevel@tonic-gate if ((mkret = mkstemp(tfname)) == -1) 85*0Sstevel@tonic-gate return (NULL); 86*0Sstevel@tonic-gate 87*0Sstevel@tonic-gate (void) unlink(tfname); 88*0Sstevel@tonic-gate current_umask = umask(0777); 89*0Sstevel@tonic-gate (void) umask(current_umask); 90*0Sstevel@tonic-gate (void) fchmod(mkret, 0666 & ~current_umask); 91*0Sstevel@tonic-gate if ((p = fdopen(mkret, "w+")) == NULL) { 92*0Sstevel@tonic-gate (void) close(mkret); 93*0Sstevel@tonic-gate return (NULL); 94*0Sstevel@tonic-gate } 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate return (p); 97*0Sstevel@tonic-gate } 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate #if !defined(_LP64) 100*0Sstevel@tonic-gate FILE * 101*0Sstevel@tonic-gate tmpfile64(void) 102*0Sstevel@tonic-gate { 103*0Sstevel@tonic-gate return (_common(B_TRUE)); 104*0Sstevel@tonic-gate } 105*0Sstevel@tonic-gate #endif /* _LP64 */ 106*0Sstevel@tonic-gate 107*0Sstevel@tonic-gate /* 108*0Sstevel@tonic-gate * This is a bit confusing -- some explanation is in order. 109*0Sstevel@tonic-gate * 110*0Sstevel@tonic-gate * When we're compiled 64-bit, there's no point in distinguishing 111*0Sstevel@tonic-gate * a "large" file from a "small" file -- they're all "large". 112*0Sstevel@tonic-gate * The argument we pass to '_common' is ignored -- we always call 113*0Sstevel@tonic-gate * mkstemp which will just do the right thing for us. 114*0Sstevel@tonic-gate */ 115*0Sstevel@tonic-gate FILE * 116*0Sstevel@tonic-gate tmpfile(void) 117*0Sstevel@tonic-gate { 118*0Sstevel@tonic-gate return (_common(B_FALSE)); 119*0Sstevel@tonic-gate } 120