forked from Imagelibrary/rtems
cfc43898e6
PR 628/rtems * src/killinfo.c, src/pthreadkill.c, src/ptimer1.c, src/sigaction.c, src/sigaddset.c, src/sigsuspend.c: Signal set of 0 is supposed to return EINVAL. In addition timer_create needed to return an error if the clock was not CLOCK_REALTIME.
95 lines
2.2 KiB
C
95 lines
2.2 KiB
C
/*
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* 3.3.4 Examine and Change Signal Action, P1003.1b-1993, p. 70
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*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*
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* $Id$
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <pthread.h>
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#include <signal.h>
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#include <errno.h>
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#include <rtems/system.h>
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#include <rtems/posix/pthread.h>
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#include <rtems/posix/psignal.h>
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#include <rtems/seterr.h>
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#include <rtems/score/isr.h>
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/*
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* PARAMETERS_PASSING_S is defined in ptimer.c
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*/
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extern void PARAMETERS_PASSING_S (int num_signal, const struct sigaction inf);
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int sigaction(
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int sig,
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const struct sigaction *act,
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struct sigaction *oact
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)
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{
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ISR_Level level;
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if ( oact )
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*oact = _POSIX_signals_Vectors[ sig ];
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if ( !sig )
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rtems_set_errno_and_return_minus_one( EINVAL );
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if ( !is_valid_signo(sig) )
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rtems_set_errno_and_return_minus_one( EINVAL );
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/*
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* Some signals cannot be ignored (P1003.1b-1993, pp. 70-72 and references.
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*
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* NOTE: Solaris documentation claims to "silently enforce" this which
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* contradicts the POSIX specification.
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*/
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if ( sig == SIGKILL )
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rtems_set_errno_and_return_minus_one( EINVAL );
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/*
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* Evaluate the new action structure and set the global signal vector
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* appropriately.
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*/
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if ( act ) {
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/*
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* Unless the user is installing the default signal actions, then
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* we can just copy the provided sigaction structure into the vectors.
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*/
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_ISR_Disable( level );
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if ( act->sa_handler == SIG_DFL ) {
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_POSIX_signals_Vectors[ sig ] = _POSIX_signals_Default_vectors[ sig ];
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} else {
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_POSIX_signals_Clear_process_signals( signo_to_mask(sig) );
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_POSIX_signals_Vectors[ sig ] = *act;
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}
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_ISR_Enable( level );
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}
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/*
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* No need to evaluate or dispatch because:
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*
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* + If we were ignoring the signal before, none could be pending
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* now (signals not posted when SIG_IGN).
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* + If we are now ignoring a signal that was previously pending,
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* we clear the pending signal indicator.
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*/
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return 0;
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}
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