diff options
Diffstat (limited to 'sysdeps/posix/mkstemp.c')
-rw-r--r-- | sysdeps/posix/mkstemp.c | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/sysdeps/posix/mkstemp.c b/sysdeps/posix/mkstemp.c deleted file mode 100644 index d380935..0000000 --- a/sysdeps/posix/mkstemp.c +++ /dev/null @@ -1,90 +0,0 @@ -/* Copyright (C) 1991, 1992, 1996, 1998 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <stdlib.h> -#include <string.h> -#include <errno.h> -#include <stdint.h> -#include <stdio.h> -#include <fcntl.h> -#include <unistd.h> -#include <sys/time.h> - -/* Generate a unique temporary file name from TEMPLATE. - The last six characters of TEMPLATE must be "XXXXXX"; - they are replaced with a string that makes the filename unique. - Returns a file descriptor open on the file for reading and writing. */ -int -mkstemp (template) - char *template; -{ - static const char letters[62] - = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; - static uint64_t value; - struct timeval tv; - char *XXXXXX; - size_t len; - int count; - - len = strlen (template); - if (len < 6 || strcmp (&template[len - 6], "XXXXXX")) - { - __set_errno (EINVAL); - return -1; - } - - /* This is where the Xs start. */ - XXXXXX = &template[len - 6]; - - /* Get some more or less random data. */ - __gettimeofday (&tv, NULL); - value += ((uint64_t) tv.tv_usec << 16) ^ tv.tv_sec ^ __getpid (); - - for (count = 0; count < TMP_MAX; ++count) - { - uint64_t v = value; - int fd; - - /* 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]; - - fd = __open (template, O_RDWR|O_CREAT|O_EXCL, 0600); - if (fd >= 0) - /* The file does not exist. */ - return fd; - - /* This is a random value. It is only necessary that the next - TMP_MAX values generated by adding 7777 to VALUE are different - with (module 2^32). */ - value += 7777; - } - - /* We return the null string if we can't find a unique file name. */ - template[0] = '\0'; - return -1; -} |