198937Sdes/* THIS FILE HAS BEEN MODIFIED FROM THE ORIGINAL OPENBSD SOURCE */ 298937Sdes/* Changes: Removed mktemp */ 398937Sdes 4247485Sdes/* $OpenBSD: mktemp.c,v 1.30 2010/03/21 23:09:30 schwarze Exp $ */ 598937Sdes/* 6247485Sdes * Copyright (c) 1996-1998, 2008 Theo de Raadt 7247485Sdes * Copyright (c) 1997, 2008-2009 Todd C. Miller 898937Sdes * 9247485Sdes * Permission to use, copy, modify, and distribute this software for any 10247485Sdes * purpose with or without fee is hereby granted, provided that the above 11247485Sdes * copyright notice and this permission notice appear in all copies. 1298937Sdes * 13247485Sdes * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 14247485Sdes * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 15247485Sdes * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 16247485Sdes * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 17247485Sdes * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 18247485Sdes * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 19247485Sdes * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 2098937Sdes */ 2198937Sdes 22157016Sdes/* OPENBSD ORIGINAL: lib/libc/stdio/mktemp.c */ 23157016Sdes 2498937Sdes#include "includes.h" 2598937Sdes 26162852Sdes#include <sys/types.h> 27162852Sdes#include <sys/stat.h> 28247485Sdes#include <errno.h> 29162852Sdes#include <fcntl.h> 30247485Sdes#include <limits.h> 31247485Sdes#include <stdio.h> 32247485Sdes#include <stdlib.h> 33247485Sdes#include <string.h> 34162852Sdes#include <ctype.h> 35162852Sdes#include <unistd.h> 36162852Sdes 37113908Sdes#if !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) 3898937Sdes 39247485Sdes#define MKTEMP_NAME 0 40247485Sdes#define MKTEMP_FILE 1 41247485Sdes#define MKTEMP_DIR 2 4298937Sdes 43247485Sdes#define TEMPCHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" 44247485Sdes#define NUM_CHARS (sizeof(TEMPCHARS) - 1) 45247485Sdes 46247485Sdesstatic int 47247485Sdesmktemp_internal(char *path, int slen, int mode) 4898937Sdes{ 49247485Sdes char *start, *cp, *ep; 50247485Sdes const char *tempchars = TEMPCHARS; 51247485Sdes unsigned int r, tries; 52247485Sdes struct stat sb; 53247485Sdes size_t len; 5498937Sdes int fd; 5598937Sdes 56247485Sdes len = strlen(path); 57247485Sdes if (len == 0 || slen < 0 || (size_t)slen >= len) { 58247485Sdes errno = EINVAL; 59247485Sdes return(-1); 60247485Sdes } 61247485Sdes ep = path + len - slen; 62247485Sdes 63247485Sdes tries = 1; 64247485Sdes for (start = ep; start > path && start[-1] == 'X'; start--) { 65247485Sdes if (tries < INT_MAX / NUM_CHARS) 66247485Sdes tries *= NUM_CHARS; 67247485Sdes } 68247485Sdes tries *= 2; 69247485Sdes 70247485Sdes do { 71247485Sdes for (cp = start; cp != ep; cp++) { 72247485Sdes r = arc4random_uniform(NUM_CHARS); 73247485Sdes *cp = tempchars[r]; 74247485Sdes } 75247485Sdes 76247485Sdes switch (mode) { 77247485Sdes case MKTEMP_NAME: 78247485Sdes if (lstat(path, &sb) != 0) 79247485Sdes return(errno == ENOENT ? 0 : -1); 80247485Sdes break; 81247485Sdes case MKTEMP_FILE: 82247485Sdes fd = open(path, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR); 83247485Sdes if (fd != -1 || errno != EEXIST) 84247485Sdes return(fd); 85247485Sdes break; 86247485Sdes case MKTEMP_DIR: 87247485Sdes if (mkdir(path, S_IRUSR|S_IWUSR|S_IXUSR) == 0) 88247485Sdes return(0); 89247485Sdes if (errno != EEXIST) 90247485Sdes return(-1); 91247485Sdes break; 92247485Sdes } 93247485Sdes } while (--tries); 94247485Sdes 95247485Sdes errno = EEXIST; 96247485Sdes return(-1); 9798937Sdes} 9898937Sdes 99247485Sdes#if 0 100247485Sdeschar *_mktemp(char *); 101247485Sdes 102247485Sdeschar * 103247485Sdes_mktemp(char *path) 10498937Sdes{ 105247485Sdes if (mktemp_internal(path, 0, MKTEMP_NAME) == -1) 106247485Sdes return(NULL); 107247485Sdes return(path); 10898937Sdes} 10998937Sdes 110247485Sdes__warn_references(mktemp, 111247485Sdes "warning: mktemp() possibly used unsafely; consider using mkstemp()"); 112247485Sdes 11398937Sdeschar * 114247485Sdesmktemp(char *path) 11598937Sdes{ 116247485Sdes return(_mktemp(path)); 11798937Sdes} 118247485Sdes#endif 11998937Sdes 120247485Sdesint 121247485Sdesmkstemp(char *path) 12298937Sdes{ 123247485Sdes return(mktemp_internal(path, 0, MKTEMP_FILE)); 124247485Sdes} 12598937Sdes 126247485Sdesint 127247485Sdesmkstemps(char *path, int slen) 128247485Sdes{ 129247485Sdes return(mktemp_internal(path, slen, MKTEMP_FILE)); 130247485Sdes} 13198937Sdes 132247485Sdeschar * 133247485Sdesmkdtemp(char *path) 134247485Sdes{ 135247485Sdes int error; 13698937Sdes 137247485Sdes error = mktemp_internal(path, 0, MKTEMP_DIR); 138247485Sdes return(error ? NULL : path); 13998937Sdes} 14098937Sdes 141113908Sdes#endif /* !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) */ 142