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/* Open a stdio stream on an anonymous temporary file. Hurd version.
Copyright (C) 2001-2022 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <hurd.h>
#include <hurd/fs.h>
#include <hurd/fd.h>
#include <fcntl.h>
#include <unistd.h>
#include <iolibio.h>
/* This returns a new stream opened on a temporary file (generated
by tmpnam). The file is opened with mode "w+b" (binary read/write).
If we couldn't generate a unique filename or the file couldn't
be opened, NULL is returned. */
FILE *
__tmpfile (void)
{
error_t err;
file_t file;
int fd;
FILE *f;
/* Get a port to the directory that will contain the file. */
const char *dirname = __libc_secure_getenv ("TMPDIR") ?: P_tmpdir;
file_t dir = __file_name_lookup (dirname, 0, 0);
if (dir == MACH_PORT_NULL)
return NULL;
/* Create an unnamed file in the temporary directory. */
err = __dir_mkfile (dir, O_RDWR, S_IRUSR | S_IWUSR, &file);
__mach_port_deallocate (__mach_task_self (), dir);
if (err)
return __hurd_fail (err), NULL;
/* Get a file descriptor for that port. POSIX.1 requires that streams
returned by tmpfile allocate file descriptors as fopen would. */
fd = _hurd_intern_fd (file, O_RDWR, 1); /* dealloc on error */
if (fd < 0)
return NULL;
/* Open a stream on the unnamed file.
It will cease to exist when this stream is closed. */
if ((f = _IO_fdopen (fd, "w+b")) == NULL)
__close (fd);
return f;
}
#include <shlib-compat.h>
versioned_symbol (libc, __tmpfile, tmpfile, GLIBC_2_1);
weak_alias (__tmpfile, tmpfile64)
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