>Number:         2249
>Category:       bin
>Synopsis:       /bin/mt write filemarks in spite of read-only operation.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people (Utility Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Mar 22 20:50:08 1996
>Last-Modified:
>Originator:     Hitoshi Osada
>Organization:
None
>Release:        NetBSD 1.1A Mar 17
>Environment:
	
System: NetBSD thatat.standalone.co.jp 1.1A NetBSD 1.1A (THATAT) #11: Wed Mar 20 01:22:44 JST 1996 that@thatat.standalone.co.jp:/usr/src/sys/arch/i386/compile/THATAT i386


>Description:
	/bin/mt write filemarks in spite of read-only(space, eom) operation.

>How-To-Repeat:
	% tar cvf /dev/rst0 /bin
	% mt rew
	% tar tvf /dev/rst0
>Fix:
*** mt.c	Wed Mar  6 21:07:49 1996
--- mt.c.new	Wed Mar 20 00:26:01 1996
***************
*** 103,108 ****
--- 103,109 ----
  	struct mtop mt_com;
  	int ch, len, mtfd;
  	char *p, *tape;
+ 	int openmode;
  
  	uid = getuid();
  	euid = geteuid();
***************
*** 143,150 ****
  		if (strncmp(p, comp->c_name, len) == 0)
  			break;
  	}
! 	if ((mtfd = host ? rmtopen(tape, 2) :
! 	    open(tape, O_WRONLY|O_CREAT, 0666)) < 0)
  		err(2, "%s", tape);
  	if (comp->c_code != MTNOP) {
  		mt_com.mt_op = comp->c_code;
--- 144,152 ----
  		if (strncmp(p, comp->c_name, len) == 0)
  			break;
  	}
! 	openmode = comp->c_ronly ? O_RDONLY : O_WRONLY;
! 	if ((mtfd = host ? rmtopen(tape, openmode) :
! 	    open(tape, openmode)) < 0)
  		err(2, "%s", tape);
  	if (comp->c_code != MTNOP) {
  		mt_com.mt_op = comp->c_code;

>Audit-Trail:
>Unformatted: