>Number:         105
>Category:       bin
>Synopsis:       usr.bin/mail does not obey the spool file locking protocol
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    gnats-admin (Utility Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jan 28 16:50:13 1994
>Originator:     Adam Glass (noticed by Theo Deraadt)
>Organization:
Adam Glass                        |E-mail home: glass@sun-lamp.cs.berkeley.edu
				  |Physical   : Seattle
		     "reality is for dead birds"
>Release:        NetBSD-current
>Environment:
System: NetBSD sun-lamp.cs.berkeley.edu 0.9a SUN_LAMP_AHBBT_NODDB#24 i386

>Description:
	usr.bin/mail and libexec/mail.local must obey the same protocol
		in order to avoid corruption/data loss of the users mail
		spool file.
	The problem is that usr.bin/mail does not obey the locking
		protocol.  It does use flock() once, but doesn't check
		for failure.

>How-To-Repeat:
	do simultaneous delivery via mail.local, and writeback via mail.

>Fix:
	fix usr.bin/mail to obey mail.local locking protocol.  make
		sure mh is configured similarly by default.



>Audit-Trail:
>Unformatted:

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