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/*
* Copyright (c) 2017 Balabit
* Copyright (c) 2017 Balázs Scheidler
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "named-pipe.h"
#include "affile-source.h"
#include "affile-dest.h"
#include "transport/transport-file.h"
#include "transport/transport-pipe.h"
#include "file-opener.h"
#include "logproto/logproto-text-client.h"
#include "messages.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
static gboolean
_prepare_open(FileOpener *self, const gchar *name)
{
struct stat st;
if (stat(name, &st) < 0 &&
(errno == ENOENT || errno == ENOTDIR))
{
if (mkfifo(name, self->options->file_perm_options.file_perm) < 0)
{
msg_error("Error creating named pipe, mkfifo() returned an error",
evt_tag_str("file", name),
evt_tag_str("error", g_strerror(errno)));
return FALSE;
}
return TRUE;
}
if (!S_ISFIFO(st.st_mode))
{
msg_error("You are using the pipe() driver, underlying file is not a FIFO, it should be used by file()",
evt_tag_str("filename", name));
errno = EINVAL;
return FALSE;
}
return TRUE;
}
static gint
_get_open_flags(FileOpener *self, FileDirection dir)
{
switch (dir)
{
case AFFILE_DIR_READ:
case AFFILE_DIR_WRITE:
return (O_RDWR | O_NOCTTY | O_NONBLOCK | O_LARGEFILE);
default:
g_assert_not_reached();
}
}
static LogTransport *
_construct_transport(FileOpener *self, gint fd)
{
LogTransport *transport = log_transport_pipe_new(fd);
transport->read = log_transport_file_read_and_ignore_eof_method;
return transport;
}
static LogProtoServer *
_construct_src_proto(FileOpener *s, LogTransport *transport, LogProtoFileReaderOptions *proto_options)
{
return log_proto_file_reader_new(transport, proto_options);
}
static LogProtoClient *
_construct_dst_proto(FileOpener *self, LogTransport *transport, LogProtoClientOptions *proto_options)
{
return log_proto_text_client_new(transport, proto_options);
}
void
pipe_sd_set_create_dirs(LogDriver *s, gboolean create_dirs)
{
AFFileSourceDriver *self = (AFFileSourceDriver *) s;
self->file_opener_options.create_dirs = create_dirs;
}
FileOpener *
file_opener_for_named_pipes_new(void)
{
FileOpener *self = file_opener_new();
self->prepare_open = _prepare_open;
self->get_open_flags = _get_open_flags;
self->construct_transport = _construct_transport;
self->construct_src_proto = _construct_src_proto;
self->construct_dst_proto = _construct_dst_proto;
return self;
}
LogDriver *
pipe_sd_new(gchar *filename, GlobalConfig *cfg)
{
AFFileSourceDriver *self = affile_sd_new_instance(filename, cfg);
self->file_reader_options.reader_options.super.stats_source = stats_register_type("pipe");
if (cfg_is_config_version_older(cfg, VERSION_VALUE_3_2))
{
msg_warning_once("WARNING: the expected message format is being changed for pipe() to improve "
"syslogd compatibity with " VERSION_3_2 ". If you are using custom "
"applications which bypass the syslog() API, you might "
"need the 'expect-hostname' flag to get the old behaviour back");
}
else
{
self->file_reader_options.reader_options.parse_options.flags &= ~LP_EXPECT_HOSTNAME;
}
self->file_opener = file_opener_for_named_pipes_new();
affile_sd_set_transport_name(self, "local+pipe");
return &self->super.super;
}
LogDriver *
pipe_dd_new(LogTemplate *filename_template, GlobalConfig *cfg)
{
AFFileDestDriver *self = affile_dd_new_instance(filename_template, cfg);
self->writer_options.stats_source = stats_register_type("pipe");
self->file_opener = file_opener_for_named_pipes_new();
return &self->super.super;
}
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