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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2003, 2005-2007, 2009-2012 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 of the License, 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 this library. If not, see
<http://www.gnu.org/licenses/>. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/select.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <mailutils/stream.h>
int
mu_fd_wait (int fd, int *pflags, struct timeval *tvp)
{
fd_set rdset, wrset, exset;
int rc;
FD_ZERO (&rdset);
FD_ZERO (&wrset);
FD_ZERO (&exset);
if ((*pflags) & MU_STREAM_READY_RD)
FD_SET (fd, &rdset);
if ((*pflags) & MU_STREAM_READY_WR)
FD_SET (fd, &wrset);
if ((*pflags) & MU_STREAM_READY_EX)
FD_SET (fd, &exset);
do
{
if (tvp)
{
struct timeval tv = *tvp;
rc = select (fd + 1, &rdset, &wrset, &exset, &tv);
}
else
rc = select (fd + 1, &rdset, &wrset, &exset, NULL);
}
while (rc == -1 && errno == EINTR);
if (rc < 0)
return errno;
*pflags = 0;
if (rc > 0)
{
if (FD_ISSET (fd, &rdset))
*pflags |= MU_STREAM_READY_RD;
if (FD_ISSET (fd, &wrset))
*pflags |= MU_STREAM_READY_WR;
if (FD_ISSET (fd, &exset))
*pflags |= MU_STREAM_READY_EX;
}
return 0;
}
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