socket_stream.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001, 2002, 2004,
2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Mailutils 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#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/socket_stream.h>
static void
_socket_done (mu_stream_t stream)
{
struct _mu_socket_stream *s = (struct _mu_socket_stream *) stream;
if (s->filename)
free (s->filename);
}
static int
_socket_open (mu_stream_t stream)
{
struct _mu_socket_stream *s = (struct _mu_socket_stream *) stream;
int fd, rc;
struct sockaddr_un addr;
if (!s)
return EINVAL;
fd = socket (PF_UNIX, SOCK_STREAM, 0);
if (fd < 0)
return errno;
memset (&addr, 0, sizeof addr);
addr.sun_family = AF_UNIX;
strncpy (addr.sun_path, s->filename, sizeof addr.sun_path - 1);
addr.sun_path[sizeof addr.sun_path - 1] = 0;
if (connect (fd, (struct sockaddr *) &addr, sizeof(addr)))
{
close (fd);
return errno;
}
s->stdio_stream.file_stream.fd = fd;
s->stdio_stream.size = 0;
s->stdio_stream.offset = 0;
if (s->stdio_stream.cache)
mu_stream_truncate (s->stdio_stream.cache, 0);
return rc;
}
static int
_socket_close (mu_stream_t stream)
{
struct _mu_socket_stream *s = (struct _mu_socket_stream *) stream;
if (s->stdio_stream.file_stream.fd != -1)
{
close (s->stdio_stream.file_stream.fd);
s->stdio_stream.file_stream.fd = -1;
}
return 0;
}
int
_socket_shutdown (mu_stream_t stream, int how)
{
struct _mu_socket_stream *s = (struct _mu_socket_stream *) stream;
int flag;
switch (how)
{
case MU_STREAM_READ:
flag = SHUT_RD;
break;
case MU_STREAM_WRITE:
flag = SHUT_WR;
}
if (shutdown (s->stdio_stream.file_stream.fd, flag))
return errno;
return 0;
}
int
mu_socket_stream_create (mu_stream_t *pstream, const char *filename, int flags)
{
struct _mu_socket_stream *s;
int rc;
rc = _mu_stdio_stream_create (pstream, sizeof (*s), flags);
if (rc)
return rc;
s = (struct _mu_socket_stream *) *pstream;
s->stdio_stream.file_stream.stream.done = _socket_done;
s->stdio_stream.file_stream.stream.open = _socket_open;
s->stdio_stream.file_stream.stream.close = _socket_close;
s->stdio_stream.file_stream.stream.shutdown = _socket_shutdown;
return 0;
}