198937Sdes/* THIS FILE HAS BEEN MODIFIED FROM THE ORIGINAL OPENBSD SOURCE */ 298937Sdes/* Changes: Removed mktemp */ 398937Sdes 4240075Sdes/* $OpenBSD: mktemp.c,v 1.30 2010/03/21 23:09:30 schwarze Exp $ */ 598937Sdes/* 6240075Sdes * Copyright (c) 1996-1998, 2008 Theo de Raadt 7240075Sdes * Copyright (c) 1997, 2008-2009 Todd C. Miller 898937Sdes * 9240075Sdes * Permission to use, copy, modify, and distribute this software for any 10240075Sdes * purpose with or without fee is hereby granted, provided that the above 11240075Sdes * copyright notice and this permission notice appear in all copies. 1298937Sdes * 13240075Sdes * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 14240075Sdes * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 15240075Sdes * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 16240075Sdes * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 17240075Sdes * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 18240075Sdes * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 19240075Sdes * 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> 28240075Sdes#include <errno.h> 29162852Sdes#include <fcntl.h> 30240075Sdes#include <limits.h> 31240075Sdes#include <stdio.h> 32240075Sdes#include <stdlib.h> 33240075Sdes#include <string.h> 34162852Sdes#include <ctype.h> 35162852Sdes#include <unistd.h> 36162852Sdes 37113908Sdes#if !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) 3898937Sdes 39240075Sdes#define MKTEMP_NAME 0 40240075Sdes#define MKTEMP_FILE 1 41240075Sdes#define MKTEMP_DIR 2 4298937Sdes 43240075Sdes#define TEMPCHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" 44240075Sdes#define NUM_CHARS (sizeof(TEMPCHARS) - 1) 45240075Sdes 46240075Sdesstatic int 47240075Sdesmktemp_internal(char *path, int slen, int mode) 4898937Sdes{ 49240075Sdes char *start, *cp, *ep; 50240075Sdes const char *tempchars = TEMPCHARS; 51240075Sdes unsigned int r, tries; 52240075Sdes struct stat sb; 53240075Sdes size_t len; 5498937Sdes int fd; 5598937Sdes 56240075Sdes len = strlen(path); 57240075Sdes if (len == 0 || slen < 0 || (size_t)slen >= len) { 58240075Sdes errno = EINVAL; 59240075Sdes return(-1); 60240075Sdes } 61240075Sdes ep = path + len - slen; 62240075Sdes 63240075Sdes tries = 1; 64240075Sdes for (start = ep; start > path && start[-1] == 'X'; start--) { 65240075Sdes if (tries < INT_MAX / NUM_CHARS) 66240075Sdes tries *= NUM_CHARS; 67240075Sdes } 68240075Sdes tries *= 2; 69240075Sdes 70240075Sdes do { 71240075Sdes for (cp = start; cp != ep; cp++) { 72240075Sdes r = arc4random_uniform(NUM_CHARS); 73240075Sdes *cp = tempchars[r]; 74240075Sdes } 75240075Sdes 76240075Sdes switch (mode) { 77240075Sdes case MKTEMP_NAME: 78240075Sdes if (lstat(path, &sb) != 0) 79240075Sdes return(errno == ENOENT ? 0 : -1); 80240075Sdes break; 81240075Sdes case MKTEMP_FILE: 82240075Sdes fd = open(path, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR); 83240075Sdes if (fd != -1 || errno != EEXIST) 84240075Sdes return(fd); 85240075Sdes break; 86240075Sdes case MKTEMP_DIR: 87240075Sdes if (mkdir(path, S_IRUSR|S_IWUSR|S_IXUSR) == 0) 88240075Sdes return(0); 89240075Sdes if (errno != EEXIST) 90240075Sdes return(-1); 91240075Sdes break; 92240075Sdes } 93240075Sdes } while (--tries); 94240075Sdes 95240075Sdes errno = EEXIST; 96240075Sdes return(-1); 9798937Sdes} 9898937Sdes 99240075Sdes#if 0 100240075Sdeschar *_mktemp(char *); 101240075Sdes 102240075Sdeschar * 103240075Sdes_mktemp(char *path) 10498937Sdes{ 105240075Sdes if (mktemp_internal(path, 0, MKTEMP_NAME) == -1) 106240075Sdes return(NULL); 107240075Sdes return(path); 10898937Sdes} 10998937Sdes 110240075Sdes__warn_references(mktemp, 111240075Sdes "warning: mktemp() possibly used unsafely; consider using mkstemp()"); 112240075Sdes 11398937Sdeschar * 114240075Sdesmktemp(char *path) 11598937Sdes{ 116240075Sdes return(_mktemp(path)); 11798937Sdes} 118240075Sdes#endif 11998937Sdes 120240075Sdesint 121240075Sdesmkstemp(char *path) 12298937Sdes{ 123240075Sdes return(mktemp_internal(path, 0, MKTEMP_FILE)); 124240075Sdes} 12598937Sdes 126240075Sdesint 127240075Sdesmkstemps(char *path, int slen) 128240075Sdes{ 129240075Sdes return(mktemp_internal(path, slen, MKTEMP_FILE)); 130240075Sdes} 13198937Sdes 132240075Sdeschar * 133240075Sdesmkdtemp(char *path) 134240075Sdes{ 135240075Sdes int error; 13698937Sdes 137240075Sdes error = mktemp_internal(path, 0, MKTEMP_DIR); 138240075Sdes return(error ? NULL : path); 13998937Sdes} 14098937Sdes 141113908Sdes#endif /* !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) */ 142