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69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/* Open a stdio stream on an anonymous temporary file. Hurd version.
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Copyright (C) 2001-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <hurd.h>
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#include <hurd/fs.h>
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#include <hurd/fd.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <iolibio.h>
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/* This returns a new stream opened on a temporary file (generated
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by tmpnam). The file is opened with mode "w+b" (binary read/write).
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If we couldn't generate a unique filename or the file couldn't
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be opened, NULL is returned. */
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FILE *
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__tmpfile (void)
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{
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error_t err;
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file_t file;
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int fd;
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FILE *f;
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/* Get a port to the directory that will contain the file. */
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const char *dirname = __libc_secure_getenv ("TMPDIR") ?: P_tmpdir;
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file_t dir = __file_name_lookup (dirname, 0, 0);
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if (dir == MACH_PORT_NULL)
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return NULL;
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/* Create an unnamed file in the temporary directory. */
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err = __dir_mkfile (dir, O_RDWR, S_IRUSR | S_IWUSR, &file);
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__mach_port_deallocate (__mach_task_self (), dir);
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if (err)
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return __hurd_fail (err), NULL;
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/* Get a file descriptor for that port. POSIX.1 requires that streams
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returned by tmpfile allocate file descriptors as fopen would. */
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fd = _hurd_intern_fd (file, O_RDWR, 1); /* dealloc on error */
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if (fd < 0)
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return NULL;
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/* Open a stream on the unnamed file.
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It will cease to exist when this stream is closed. */
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if ((f = _IO_fdopen (fd, "w+b")) == NULL)
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__close (fd);
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return f;
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}
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#include <shlib-compat.h>
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versioned_symbol (libc, __tmpfile, tmpfile, GLIBC_2_1);
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weak_alias (__tmpfile, tmpfile64)
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