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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* This program 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; version 2 of the License.
*
* 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
*/
/* Various helper functions not intended to be part of a public API */
#include <drizzled/global.h>
#include "libdrizzle_priv.h"
#include <poll.h>
#include <fcntl.h>
const char *unknown_sqlstate= "HY000";
const char *not_error_sqlstate= "00000";
const char *cant_connect_sqlstate= "08001";
const char * sqlstate_get_unknown(void)
{
return unknown_sqlstate;
}
const char * sqlstate_get_not_error(void)
{
return not_error_sqlstate;
}
const char * sqlstate_get_cant_connect(void)
{
return cant_connect_sqlstate;
}
/****************************************************************************
A modified version of connect(). connect_with_timeout() allows you to specify
a timeout value, in seconds, that we should wait until we
derermine we can't connect to a particular host. If timeout is 0,
connect_with_timeout() will behave exactly like connect().
Base version coded by Steve Bernacki, Jr. <steve@navinet.net>
*****************************************************************************/
int connect_with_timeout(int fd, const struct sockaddr *name, uint32_t namelen, int32_t timeout)
{
int flags, res, s_err;
/*
If they passed us a timeout of zero, we should behave
exactly like the normal connect() call does.
*/
if (timeout == 0)
return connect(fd, (struct sockaddr*) name, namelen);
flags = fcntl(fd, F_GETFL, 0); /* Set socket to not block */
#ifdef O_NONBLOCK
fcntl(fd, F_SETFL, flags | O_NONBLOCK); /* and save the flags.. */
#endif
res= connect(fd, (struct sockaddr*) name, namelen);
s_err= errno; /* Save the error... */
fcntl(fd, F_SETFL, flags);
if ((res != 0) && (s_err != EINPROGRESS))
{
errno= s_err; /* Restore it */
return(-1);
}
if (res == 0) /* Connected quickly! */
return(0);
return wait_for_data(fd, timeout);
}
/*
Wait up to timeout seconds for a connection to be established.
We prefer to do this with poll() as there is no limitations with this.
If not, we will use select()
*/
int wait_for_data(int fd, int32_t timeout)
{
struct pollfd ufds;
int res;
ufds.fd= fd;
ufds.events= POLLIN | POLLPRI;
if (!(res= poll(&ufds, 1, (int) timeout*1000)))
{
errno= EINTR;
return -1;
}
if (res < 0 || !(ufds.revents & (POLLIN | POLLPRI)) || (ufds.revents & POLLHUP))
return -1;
return 0;
}
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