diff options
Diffstat (limited to 'gl/mkdtemp.c')
| -rw-r--r-- | gl/mkdtemp.c | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/gl/mkdtemp.c b/gl/mkdtemp.c deleted file mode 100644 index e8db73908..000000000 --- a/gl/mkdtemp.c +++ /dev/null @@ -1,218 +0,0 @@ -/* Copyright (C) 1999, 2001-2003, 2006 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3, or (at your option) - any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along - with this program; if not, see <http://www.gnu.org/licenses/>. */ - -/* Extracted from misc/mkdtemp.c and sysdeps/posix/tempname.c. */ - -#include <config.h> - -/* Specification. */ -#include "mkdtemp.h" - -#include <errno.h> -#ifndef __set_errno -# ifdef HAVE_W32CE_SYSTEM -# include <gpg-error.h> -# define __set_errno(Val) gpg_err_set_errno ((Val)) -# else -# define __set_errno(Val) errno = (Val) -# endif -#endif - -#include <stddef.h> -#include <stdint.h> -#include <stdlib.h> -#include <string.h> - -#include <stdio.h> -#ifndef TMP_MAX -# define TMP_MAX 238328 -#endif - -#include <unistd.h> - -#if HAVE_GETTIMEOFDAY || _LIBC -# if HAVE_SYS_TIME_H || _LIBC -# include <sys/time.h> -# endif -#else -# if HAVE_TIME_H || _LIBC -# include <time.h> -# endif -#endif - -#include <sys/stat.h> -#if !defined S_ISDIR && defined S_IFDIR -# define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR) -#endif -#if !S_IRUSR && S_IREAD -# define S_IRUSR S_IREAD -#endif -#if !S_IRUSR -# define S_IRUSR 00400 -#endif -#if !S_IWUSR && S_IWRITE -# define S_IWUSR S_IWRITE -#endif -#if !S_IWUSR -# define S_IWUSR 00200 -#endif -#if !S_IXUSR && S_IEXEC -# define S_IXUSR S_IEXEC -#endif -#if !S_IXUSR -# define S_IXUSR 00100 -#endif - -#ifdef __MINGW32__ -# include <io.h> -#endif - -#ifdef HAVE_W32CE_SYSTEM -#include <windows.h> -#define getpid() GetCurrentProcessId () -#endif - -#if !_LIBC -# define __getpid getpid -# define __gettimeofday gettimeofday -# define __mkdir mkdir -#endif - -/* Use the widest available unsigned type if uint64_t is not - available. The algorithm below extracts a number less than 62**6 - (approximately 2**35.725) from uint64_t, so ancient hosts where - uintmax_t is only 32 bits lose about 3.725 bits of randomness, - which is better than not having mkstemp at all. */ -#if !defined UINT64_MAX && !defined uint64_t -# define uint64_t uintmax_t -#endif - -/* These are the characters used in temporary filenames. */ -static const char letters[] = -"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; - -/* Generate a temporary file name based on TMPL. TMPL must match the - rules for mk[s]temp (i.e. end in "XXXXXX"). The name constructed - does not exist at the time of the call to __gen_tempname. TMPL is - overwritten with the result. - - KIND is: - __GT_DIR: create a directory, which will be mode 0700. - - We use a clever algorithm to get hard-to-predict names. */ -static int -gen_tempname (char *tmpl) -{ - int len; - char *XXXXXX; - static uint64_t value; - uint64_t random_time_bits; - unsigned int count; - int fd = -1; - int save_errno = errno; - - /* A lower bound on the number of temporary files to attempt to - generate. The maximum total number of temporary file names that - can exist for a given template is 62**6. It should never be - necessary to try all these combinations. Instead if a reasonable - number of names is tried (we define reasonable as 62**3) fail to - give the system administrator the chance to remove the problems. */ -#define ATTEMPTS_MIN (62 * 62 * 62) - - /* The number of times to attempt to generate a temporary file. To - conform to POSIX, this must be no smaller than TMP_MAX. */ -#if ATTEMPTS_MIN < TMP_MAX - unsigned int attempts = TMP_MAX; -#else - unsigned int attempts = ATTEMPTS_MIN; -#endif - - len = strlen (tmpl); - if (len < 6 || strcmp (&tmpl[len - 6], "XXXXXX")) - { - __set_errno (EINVAL); - return -1; - } - - /* This is where the Xs start. */ - XXXXXX = &tmpl[len - 6]; - - /* Get some more or less random data. */ -#ifdef RANDOM_BITS - RANDOM_BITS (random_time_bits); -#else -# if HAVE_GETTIMEOFDAY || _LIBC - { - struct timeval tv; - __gettimeofday (&tv, NULL); - random_time_bits = ((uint64_t) tv.tv_usec << 16) ^ tv.tv_sec; - } -# else - random_time_bits = time (NULL); -# endif -#endif - value += random_time_bits ^ __getpid (); - - for (count = 0; count < attempts; value += 7777, ++count) - { - uint64_t v = value; - - /* Fill in the random bits. */ - XXXXXX[0] = letters[v % 62]; - v /= 62; - XXXXXX[1] = letters[v % 62]; - v /= 62; - XXXXXX[2] = letters[v % 62]; - v /= 62; - XXXXXX[3] = letters[v % 62]; - v /= 62; - XXXXXX[4] = letters[v % 62]; - v /= 62; - XXXXXX[5] = letters[v % 62]; - -#ifdef MKDIR_TAKES_ONE_ARG - fd = mkdir (tmpl); -#else - fd = __mkdir (tmpl, S_IRUSR | S_IWUSR | S_IXUSR); -#endif - - if (fd >= 0) - { - __set_errno (save_errno); - return fd; - } - else if (errno != EEXIST) - return -1; - } - - /* We got out of the loop because we ran out of combinations to try. */ - __set_errno (EEXIST); - return -1; -} - -/* Generate a unique temporary directory from TEMPLATE. - The last six characters of TEMPLATE must be "XXXXXX"; - they are replaced with a string that makes the filename unique. - The directory is created, mode 700, and its name is returned. - (This function comes from OpenBSD.) */ -char * -mkdtemp (char *template) -{ - if (gen_tempname (template)) - return NULL; - else - return template; -} |