Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site allegra.UUCP
Path: utzoo!watmath!clyde!cbosgd!ihnp4!allegra!mp
From: mp@allegra.UUCP (Mark Plotnick)
Newsgroups: net.bugs.4bsd
Subject: remote processes started with rsh can be killed unintentionally
Message-ID: <4831@allegra.UUCP>
Date: Mon, 29-Jul-85 16:34:15 EDT
Article-I.D.: allegra.4831
Posted: Mon Jul 29 16:34:15 1985
Date-Received: Wed, 31-Jul-85 03:42:32 EDT
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 44

...
Description:
	rsh will catch interrupt, quit, and soft kill signals, and propagate
	them to the remote process, even if those signals were being
	ignored, for example by having started the rsh in the background
	or with nohup.
	This is only a problem for /bin/sh users, since it doesn't
	place children in different process groups as the csh does.
Repeat-By:
	$ rsh presto "troff big-job" &
	$ [ at this point if you type ^C, the troff will be interrupted ]
Fix:
	
*** /tmp/rsh.c.old
--- /tmp/rsh.c
***************
*** 127,135
  	}
  	(void) setuid(getuid());
  	omask = sigblock(mask(SIGINT)|mask(SIGQUIT)|mask(SIGTERM));
! 	signal(SIGINT, sendsig);
! 	signal(SIGQUIT, sendsig);
! 	signal(SIGTERM, sendsig);
          pid = fork();
          if (pid < 0) {
  		perror("fork");

--- 127,138 -----
  	}
  	(void) setuid(getuid());
  	omask = sigblock(mask(SIGINT)|mask(SIGQUIT)|mask(SIGTERM));
! 	if(signal(SIGINT,SIG_IGN)!=SIG_IGN)
! 		signal(SIGINT, sendsig);
! 	if(signal(SIGQUIT,SIG_IGN)!=SIG_IGN)
! 		signal(SIGQUIT, sendsig);
! 	if(signal(SIGTERM,SIG_IGN)!=SIG_IGN)
! 		signal(SIGTERM, sendsig);
          pid = fork();
          if (pid < 0) {
  		perror("fork");


	Mark Plotnick
	allegra!mp