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Perform special sigset() check.

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Make sure signal is not blocked.  If it is, return SIG_HOLD instead
of handler and unblock the signal.
This commit is contained in:
Steven Wallace 1996-12-08 02:24:10 +00:00
parent 2c7d163688
commit 9ce8b2a2f6
1 changed files with 14 additions and 2 deletions
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16
sys/i386/ibcs2/ibcs2_signal.c
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@ -25,7 +25,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: ibcs2_signal.c,v 1.5 1995/10/21 05:01:57 swallace Exp $
* $Id: ibcs2_signal.c,v 1.6 1995/10/21 20:33:43 swallace Exp $
*/
#include <sys/param.h>
@ -309,17 +309,29 @@ ibcs2_sigsys(p, uap, retval)
if (signum != SIGALRM)
sa.sa_flags |= SA_RESTART;
#endif
*retval = (int)IBCS2_SIG_ERR; /* init error return */
/* perform native sigaction() */
if ((error = copyout(&sa, nbsa, sizeof(sa))) != 0)
return error;
if ((error = sigaction(p, &sa_args, retval)) != 0) {
DPRINTF(("signal: sigaction failed: %d\n",
error));
*retval = (int)IBCS2_SIG_ERR;
return error;
}
if ((error = copyin(obsa, &sa, sizeof(sa))) != 0)
return error;
*retval = (int)sa.sa_handler;
/* special sigset() check */
if(IBCS2_SIGCALL(SCARG(uap, sig)) == IBCS2_SIGSET_MASK)
/* check to make sure signal is not blocked */
if(sigismember(&p->p_sigmask, signum)) {
/* return SIG_HOLD and unblock signal*/
*retval = (int)IBCS2_SIG_HOLD;
p->p_sigmask &= ~sigmask(signum);
}
return 0;
}