TP(1)               UNIX Programmer's Manual                TP(1)



NAME
     tp - manipulate tape or floppy archive

SYNOPSIS
     tp [ key ] [ name ... ]

DESCRIPTION
     T_p_ saves and restores files on RX02 floppy or magtape.  Its
     actions are controlled by the k_e_y_ argument.  The key is a
     string of characters containing at most one function letter
     and possibly one or more function modifiers.  Other argu-
     ments to the command are file or directory names specifying
     which files are to be dumped, restored, or listed.  In all
     cases, appearance of a directory name refers to the files
     and (recursively) subdirectories of that directory.

     The function portion of the key is specified by one of the
     following letters:

     r       The named files are written on the tape.  If files
             with the same names already exist, they are
             replaced.  `Same' is determined by string com-
             parison, so ./abc can never be the same as
             /usr/sbo/abc even if /usr/sbo is the current direc-
             tory.  If no file argument is given, . is the
             default.

     u       updates the tape.  u is like r, but a file is
             replaced only if its modification date is later than
             the date stored on the tape; that is to say, if it
             has changed since it was dumped.  u is the default
             command if none is given.

     d       deletes the named files from the tape.  At least one
             name argument must be given.  This function is not
             permitted on magtapes.

     x       extracts the named files from the tape to the file
             system.  The owner and mode are restored.  If no
             file argument is given, the entire contents of the
             tape are extracted.

     t       lists the names of the specified files.  If no file
             argument is given, the entire contents of the tape
             is listed.

     The following characters may be used in addition to the
     letter which selects the function desired.

     m         Specifies magtape as opposed to floppy disk.

     0,1       This modifier selects the drive on which the tape



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TP(1)               UNIX Programmer's Manual                TP(1)



               or diskette is mounted.  0 is the default.

     S         Deal with single-density floppy, or with 800 bpi
               magtape.  The default is double-density or 1600.

     v         Normally t_p_ does its work silently.  The v (ver-
               bose) option causes it to type the name of each
               file it treats preceded by the function letter.
               With the t function, v gives more information
               about the tape entries than just the name.

     V         Older versions of t_p_ were a bit noisier; in par-
               ticular, they always produced a summary of the
               number of directory entries and blocks remaining
               on the tape or diskette when exiting.  The V flag
               is now necessary to produce this verbiage.  Note
               that v does not imply V, nor vice versa.

     c         means a fresh dump is being created; the tape or
               diskette directory is cleared before beginning.
               Usable only with r and u. This option is assumed
               with magtape since it is impossible to selectively
               overwrite magtape.

     i         Errors reading and writing the tape are noted, but
               no action is taken.  Normally, errors cause a
               return to the command level.

     f         Use the first named file, rather than a tape, as
               the archive.  This option is known to work only
               with x.

     w         causes t_p_ to pause before treating each file, type
               the indicative letter and the file name (as with
               v) and await the user's response.  Response y
               means `yes', so the file is treated.  Null
               response means `no', and the file does not take
               part in whatever is being done.  Response x means
               `exit'; the t_p_ command terminates immediately.  In
               the x function, files previously asked about have
               been extracted already.  With r, u, and d no
               change has been made to the tape.

FILES
     /dev/rrx??
     /dev/mt?

SEE ALSO
     ar(1), tar(1)

DIAGNOSTICS
     Several; the non-obvious one is `Phase error', which means



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TP(1)               UNIX Programmer's Manual                TP(1)



     the file changed after it was selected for dumping but
     before it was dumped.

BUGS
     A single file with several links to it is treated like
     several files.

     Binary-coded control information makes magnetic tapes writ-
     ten by t_p_ difficult to carry to other machines; t_a_r_(1)
     avoids the problem.  However, t_a_r_ is sufficiently convinced
     that it's dealing with a tape that it is unpleasant to use
     with floppies.

HEP INFO
     T_p_ normally deals with magtapes and DECtapes.  Since we have
     a floppy drive and no DECtape drives, it was locally modi-
     fied to know about floppies instead.  Floppies written at
     HEP can probably be read at other UNIX sites via the f
     option.




































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