>Number:         842
>Category:       bin
>Synopsis:       /bin/kill gives error for -0
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    bin-bug-people (Utility Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Mar  4 20:20:03 1995
>Originator:     Simon J. Gerraty
>Organization:
Zen Programming...
>Release:        1.0
>Environment:
	
System: NetBSD zen.void.oz.au 1.0 NetBSD 1.0 (ZEN) #6: Tue Dec 13 09:55:20 EST 1994 root@zen.void.oz.au:/usr/src/sys/arch/i386/compile/ZEN i386


>Description:
	
I can't believe I haven't spotted this before...
	/bin/kill -0 $$
fails stating that 0 is an illegal signal.
This bug breaks 100's of valid scripts out there...

>How-To-Repeat:
	
	/bin/kill -0 $$
>Fix:
	
*** bin/kill/kill.c.~1~	Fri Dec 17 16:47:41 1993
--- bin/kill/kill.c	Sun Mar  5 14:32:47 1995
***************
*** 123,129 ****
  				    "kill: illegal signal number %s\n", *argv);
  				exit(1);
  			}
! 			if (numsig <= 0 || numsig >= NSIG) {
  				nosig(*argv);
  				/* NOTREACHED */
  			}
--- 123,129 ----
  				    "kill: illegal signal number %s\n", *argv);
  				exit(1);
  			}
! 			if (numsig < 0 || numsig >= NSIG) {
  				nosig(*argv);
  				/* NOTREACHED */
  			}
>Audit-Trail:
>Unformatted: