temp_file_stream.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2009, 2010 Free Software Foundation, Inc.
This 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, or (at your option)
any later version.
This 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 GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <mailutils/types.h>
#include <mailutils/alloc.h>
#include <mailutils/error.h>
#include <mailutils/errno.h>
#include <mailutils/nls.h>
#include <mailutils/stream.h>
#include <mailutils/sys/stream.h>
#include <mailutils/sys/temp_file_stream.h>
#include <mailutils/util.h>
static int
fd_temp_open (struct _mu_stream *str)
{
struct _mu_temp_file_stream *fstr = (struct _mu_temp_file_stream *) str;
return mu_tempfile (&fstr->hints, fstr->hflags, &fstr->stream.fd, NULL);
}
static void
fd_temp_done (struct _mu_stream *str)
{
struct _mu_temp_file_stream *fstr = (struct _mu_temp_file_stream *) str;
if (fstr->hflags & MU_TEMPFILE_TMPDIR)
free (fstr->hints.tmpdir);
if (fstr->hflags & MU_TEMPFILE_SUFFIX)
free (fstr->hints.suffix);
if (fstr->file_done)
fstr->file_done (&fstr->stream.stream);
}
int
mu_temp_file_stream_create (mu_stream_t *pstream,
struct mu_tempfile_hints *hints, int flags)
{
int rc;
struct _mu_file_stream *str;
mu_stream_t stream;
if (flags && !hints)
return EINVAL;
rc = _mu_file_stream_create (&str,
sizeof (struct _mu_temp_file_stream),
NULL,
-1,
MU_STREAM_RDWR | MU_STREAM_SEEK |
MU_STREAM_CREAT);
if (rc == 0)
{
struct _mu_temp_file_stream *tstr = (struct _mu_temp_file_stream *)str;
tstr->stream.stream.open = fd_temp_open;
tstr->file_done = tstr->stream.stream.done;
tstr->stream.stream.done = fd_temp_done;
if ((flags & MU_TEMPFILE_TMPDIR) &&
(tstr->hints.tmpdir = strdup (hints->tmpdir)) == NULL)
{
mu_stream_unref ((mu_stream_t) str);
return ENOMEM;
}
if ((flags & MU_TEMPFILE_SUFFIX) &&
(tstr->hints.suffix = strdup (hints->suffix)) == NULL)
{
mu_stream_unref ((mu_stream_t) str);
return ENOMEM;
}
tstr->hflags = flags & ~MU_TEMPFILE_MKDIR;
str->flags = _MU_FILE_STREAM_TEMP;
stream = (mu_stream_t) str;
rc = mu_stream_open (stream);
if (rc)
mu_stream_unref (stream);
else
{
mu_stream_set_buffer (stream, mu_buffer_full, 0);
*pstream = stream;
}
}
return 0;
}