Silicon Graphics IRIS Workstation User Manual page 123

TAR(1)
m
tells tar not to restore the modification times. The modification
time will be the time of extraction.
e
Force tar to continue reading past tape errors.
h
Force tar to follow symbolic links as if they were normal files or
directories.
B Forces input and output blocking to 20 blocks per record. This
option is so that tar can work across a communications channel
where the blocking may not be maintained.
R
When extracting from tape, ignore leading slashes on file names,
i.e. extract all files relative to the current directory.
U For each file extracted. unlink existing file, if any.
o Don't chown (or chgrp) files.
q Turn on debugging and extra error diagnostics. Supplying this
flag multiple times increases debugging level.
If a file name is preceded by -C, then tar will perform a chdir(2) to that file
name. This allows multiple directories not related by a close common parent
to be archived using short relative path names. For example, to archive files
from /usr/include and from /etc, one might use
If a file name of - is given on the command line when making an archive
then tar will read its standard input for a list of files to back up, one per line;
the list is terminated by an EOF. For example, to back up all files that have
changed in the last week, one might use
FILES
/dev/rmt?
/tmp/tar*
DIAGNOSTICS
Complaints about bad key characters and tape read/write errors.
Complaints if enough memory is not available to hold the link tables.
BUGS
There is no way to ask for the n-th occurrence of a file.
Tape errors are handled ungracefully.
The u option can be slow.
File name length is limited to 100 characters.
The data for a file with multiple links is output to tape with the first link
encountered. Thus, an attempt to extract a subsequent link by itself will
not have the desired result.
The cartridge tape drive always reads and writes 512-byte records.
October 1984
Silicon Graphics
tar c -C /usr include -C /etc
find / -mtime -7 -print | tar -c -
- 3 -
TAR(1)
Version 1.0