Silicon Graphics IRIS Workstation, User Manual

Page: 122 / 170

Version 1.0 - 2 - October 1984
TAR(1) Silicon Graphics TAR(1)
= files compare
! files don’t compare
The following characters may be used in addition to the letter which selects
the function desired.
d On output, tar normally places information specifying owner and modes
of directories in the archive. Former versions of tar , when encountering
this information will give error message of the form
“<name>/: cannot create”.
This option will suppress the directory information. This option
implies -D .
D On output, tar normally places information specifying owner,
modes, and device numbers of character, block, and named pipe
(fifo) special files and named pipes in the archive. Former versions
of tar , when encountering this information will create an ordinary
file of the same name whose contents is the device number, in
binary.
This option will suppress the special file information.
p This option says to restore files to their original modes, ignoring the
present umask (2). Setuid and sticky information will also be
restored to the super-user.
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
This modifier selects an alternate drive on which the tape is
mounted. The default is /dev/rmt1.
v Normally tar does its work silently. The v (verbose) option make
tar type the name of each file it treats preceded by the function
letter. With the t function, the verbose option gives more infor -
mation about the tape entries than just their names.
w Tar prints the action to be taken followed by file name, then waits
for user confirmation. If a word beginning with ‘y’ is given, the
action is done. Any other input means don’t do it.
f Tar uses the next argument as the name of the archive instead of
/dev/rmt1. If the name of the file is ‘-’, tar writes to standard out-
put or reads from standard input, whichever is appropriate.
Thus, tar can be used as the head or tail of a filter chain. Tar can
also be used to move hierarchies with the command
cd fromdir; tar cf - . | (cd todir; tar xf -)
b Tar uses the next argument as the blocking factor for tape records.
The default is 400 for the cartridge tape, 1 for standard input and
standard output, and 20 otherwise. The block size is usually
determined automatically when reading tapes if the tape was
written with a blocking factor that does not exceed the default for
that device (20 or 400). The default blocking factor should be
used for cartridge tape. A tar tape created by writing to the stan -
dard output should be read from standard input.
l tells tar to complain if it cannot resolve all of the links to the files
dumped. If this is not specified, no error messages are printed.