tp(1) tp(1)NAME tp - copy files to or from a tp archive SYNOPSIS tp [key] [name ...] DESCRIPTION tp saves and restores files within an archive, which fre- quently takes the form of magnetic tape media. Its actions are controlled by the key argument. The key is a string of characters containing at most one function letter and possi- bly one or more function modifiers. Other arguments to the command are file or directory names specifying which files are to be dumped, restored, or listed. In all cases, ap- pearance of a directory name refers to the files and (recur- sively) subdirectories of that directory. tp is useful for importing tapes made on older systems. 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 re- placed. ``Same'' is determined by string comparis- on, so .abc can never be the same as /usr/sbo/abc even if /usr/sbo is the current directory. If no file argument is given, . is the default. u Updates the tape. u is like r, but a file is re- placed 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 magnetic tapes. 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 magnetic tape as opposed to DECtape. April, 1990 1
tp(1) tp(1)0,...,7 This modifier selects the drive on which the tape is mounted. For DECtape, x is default; for magnet- ic tape 0 is the default. v Normally tp does its work silently. The v (ver- bose) flag option causes it to type the name of each file it treats preceded by the function letter. With the t function, v gives more informa- tion about the tape entries than just the name. c Means a fresh dump is being created; the tape directory is cleared before beginning. Usable only with r and u. This flag option is assumed with magnetic tape since it is impossible to selectively overwrite magnetic tape. i Errors reading and writing the tape are noted, but no action is taken. Normally, errors cause a re- turn to the command level. f Use the first named file, rather than a tape, as the archive. This flag option is known to work only with x. w Causes tp 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 tp 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. EXAMPLES tp x file1 extracts file1 from a tp formatted magnetic tape mounted on drive 0. FILES /bin/tp /dev/tap? /dev/mt? SEE ALSO ar(1), cpio(1), tar(1), dump.bsd(1M). DIAGNOSTICS Several; the nonobvious one is Phase error, which means the file changed after it was selected for dumping but before it 2 April, 1990
tp(1) tp(1)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 tp difficult to carry to other machines; tar(1) avoids the problem. tp does not copy zero-length files to tape. April, 1990 3