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Fix reporting of invalid timeouts in emulated pselect

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This commit is contained in:
Ulrich Drepper
2011-05-16 09:35:51 -04:00
parent 15cc7dd182
commit 68a3f91fca
3 changed files with 23 additions and 9 deletions
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14
misc/pselect.c
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@ -1,4 +1,4 @@
/* Copyright (C) 1996-1998,2001,2002,2003,2006 Free Software Foundation, Inc.
/* Copyright (C) 1996-1998,2001-2003,2006,2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
@ -43,7 +43,17 @@ __pselect (int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
precision and therefore the `pselect` should be available. But
for now it is hardly found. */
if (timeout != NULL)
TIMESPEC_TO_TIMEVAL (&tval, timeout);
{
/* Catch bugs which would be hidden by the TIMESPEC_TO_TIMEVAL
computations. The division by 1000 truncates values. */
if (__builtin_expect (timeout->tv_nsec < 0, 0))
{
__set_errno (EINVAL);
return -1;
}
TIMESPEC_TO_TIMEVAL (&tval, timeout);
}
/* The setting and restoring of the signal mask and the select call
should be an atomic operation. This can't be done without kernel