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sortix--sortix/libc/stdlib/mkstemp.cpp
Jonas 'Sortie' Termansen fd4b35f986 Add mkstemp(3).
2013-12-17 14:30:42 +01:00

41 lines
1.4 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
stdlib/mkstemp.cpp
Make a unique temporary filepath and opens it.
*******************************************************************************/
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
extern "C" int mkstemp(char* templ)
{
int fd;
do
{
size_t templ_len = strlen(templ);
for ( size_t i = templ_len - 6UL; i < templ_len; i++ )
templ[i] = '0' + rand() % 10;
} while ( (fd = open(templ, O_RDWR | O_EXCL | O_CREAT, 0666)) < 0 &&
(errno == EEXIST) );
return fd;
}