[7645] in Athena Bugs
re: patches to tar.c to make Holey files
daemon@ATHENA.MIT.EDU (John T Kohl)
Tue Jun 11 13:05:27 1991
Date: Tue, 11 Jun 91 13:05:04 EDT
From: John T Kohl <jtkohl@MIT.EDU>
To: bugs@MIT.EDU
In-Reply-To: [7644]
The description of what those tar.c patches do was incorrect (faulty
memory!).
What they do is create Holey files on *extraction*, so you can do things
like tar up .dir/.pag files and untar them, without ballooning their
disk usage.
for example, try tar cvf - vmunix |(cd /usr/tmp/ && tar xpBfvH -) and
compare the two, then use the stat(1) program in /mit/watchmaker/$bindir
to see that the output uses less space.
John
