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1999-04-18  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/bsd/poll.c (__poll): Add more compatiblity code to
	detect and handle invalid descriptors.
This commit is contained in:
Ulrich Drepper 1999-04-18 01:01:00 +00:00
parent 1e76ce9c89
commit 62acd37630
3 changed files with 110 additions and 35 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
1999-04-18 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/unix/bsd/poll.c (__poll): Add more compatiblity code to
detect and handle invalid descriptors.
1999-04-17 Thorsten Kukuk <kukuk@suse.de>
* timezone/zic.c (dolink): Append complete path ot only filename

2
sunrpc/rpc_cout.c
View File

@ -175,7 +175,7 @@ print_header (const definition * def)
if (inlineflag == 0)
return;
/*May cause lint to complain. but ... */
f_print (fout, "\t register int32_t *buf;\n\n");
f_print (fout, "\tregister int32_t *buf;\n\n");
}
static void

138
sysdeps/unix/bsd/poll.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1994, 1996, 1997, 1998 Free Software Foundation, Inc.
/* Copyright (C) 1994, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -60,52 +60,122 @@ __poll (fds, nfds, timeout)
__bzero (xset, bytes);
for (f = fds; f < &fds[nfds]; ++f)
if (f->fd >= 0)
{
if (f->fd >= max_fd_size)
{
/* The user provides a file descriptor number which is higher
than the maximum we got from the `getdtablesize' call.
Maybe this is ok so enlarge the arrays. */
fd_set *nrset, *nwset, *nxset;
int nbytes;
{
f->revents = 0;
if (f->fd >= 0)
{
if (f->fd >= max_fd_size)
{
/* The user provides a file descriptor number which is higher
than the maximum we got from the `getdtablesize' call.
Maybe this is ok so enlarge the arrays. */
fd_set *nrset, *nwset, *nxset;
int nbytes;
max_fd_size = roundup (f->fd, __NFDBITS);
nbytes = howmany (max_fd_size, __NFDBITS);
max_fd_size = roundup (f->fd, __NFDBITS);
nbytes = howmany (max_fd_size, __NFDBITS);
nrset = alloca (nbytes);
nwset = alloca (nbytes);
nxset = alloca (nbytes);
nrset = alloca (nbytes);
nwset = alloca (nbytes);
nxset = alloca (nbytes);
__bzero ((char *) nrset + bytes, nbytes - bytes);
__bzero ((char *) nwset + bytes, nbytes - bytes);
__bzero ((char *) nxset + bytes, nbytes - bytes);
__bzero ((char *) nrset + bytes, nbytes - bytes);
__bzero ((char *) nwset + bytes, nbytes - bytes);
__bzero ((char *) nxset + bytes, nbytes - bytes);
rset = memcpy (nrset, rset, bytes);
wset = memcpy (nwset, wset, bytes);
xset = memcpy (nxset, xset, bytes);
rset = memcpy (nrset, rset, bytes);
wset = memcpy (nwset, wset, bytes);
xset = memcpy (nxset, xset, bytes);
bytes = nbytes;
}
bytes = nbytes;
}
if (f->events & POLLIN)
FD_SET (f->fd, rset);
if (f->events & POLLOUT)
FD_SET (f->fd, wset);
if (f->events & POLLPRI)
FD_SET (f->fd, xset);
if (f->fd > maxfd && (f->events & (POLLIN|POLLOUT|POLLPRI)))
maxfd = f->fd;
}
if (f->events & POLLIN)
FD_SET (f->fd, rset);
if (f->events & POLLOUT)
FD_SET (f->fd, wset);
if (f->events & POLLPRI)
FD_SET (f->fd, xset);
if (f->fd > maxfd && (f->events & (POLLIN|POLLOUT|POLLPRI)))
maxfd = f->fd;
}
}
tv.tv_sec = timeout / 1000;
tv.tv_usec = (timeout % 1000) * 1000;
ready = __select (maxfd + 1, rset, wset, xset, timeout == -1 ? NULL : &tv);
do
{
ready = __select (maxfd + 1, rset, wset, xset,
timeout == -1 ? NULL : &tv);
/* It might be that one or more of the file descriptors is invalid.
We now try to find and mark them and then try again. */
if (ready == -1 && errno == EBADF)
{
fd_set *sngl_rset = alloca (bytes);
fd_set *sngl_wset = alloca (bytes);
fd_set *sngl_xset = alloca (bytes);
struct timeval sngl_tv;
/* Clear the original set. */
__bzero (rset, bytes);
__bzero (wset, bytes);
__bzero (xset, bytes);
/* This means we don't wait for input. */
sngl_tv.tv_sec = 0;
sngl_tv.tv_usec = 0;
maxfd = -1;
/* Reset the return value. */
ready = 0;
for (f = fds; f < &fds[nfds]; ++f)
if (f->fd != -1 && (f->events & (POLLIN|POLLOUT|POLLPRI))
&& (f->revents & POLLNVAL) == 0)
{
int n;
__bzero (sngl_rset, bytes);
__bzero (sngl_wset, bytes);
__bzero (sngl_xset, bytes);
if (f->events & POLLIN)
FD_SET (f->fd, sngl_rset);
if (f->events & POLLOUT)
FD_SET (f->fd, sngl_wset);
if (f->events & POLLPRI)
FD_SET (f->fd, sngl_xset);
n = __select (f->fd + 1, sngl_rset, sngl_wset, sngl_xset,
&sngl_tv);
if (n != -1)
{
/* This descriptor is ok. */
if (f->events & POLLIN)
FD_SET (f->fd, rset);
if (f->events & POLLOUT)
FD_SET (f->fd, wset);
if (f->events & POLLPRI)
FD_SET (f->fd, xset);
if (f->fd > maxfd)
maxfd = f->fd;
if (n > 0)
/* Count it as being available. */
++ready;
}
else if (errno == EBADF)
f->revents |= POLLNVAL;
}
}
}
while (ready == 0);
if (ready > 0)
for (f = fds; f < &fds[nfds]; ++f)
{
f->revents = 0;
if (f->fd >= 0)
{
if (FD_ISSET (f->fd, rset))