Section: User Commands (1)
Updated: October 2019
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scriptreplay - play back typescripts, using timing information  


scriptreplay [options] [-t] timingfile [typescript [divisor]]  


This program replays a typescript, using timing information to ensure that output happens in the same rhythm as it originally appeared when the script was recorded.

The replay simply displays the information again; the programs that were run when the typescript was being recorded are not run again. Since the same information is simply being displayed, scriptreplay is only guaranteed to work properly if run on the same type of terminal the typescript was recorded on. Otherwise, any escape characters in the typescript may be interpreted differently by the terminal to which scriptreplay is sending its output.

The timing information is what script(1) outputs to file specified by --log-timing.

By default, the typescript to display is assumed to be named typescript, but other filenames may be specified, as the second parameter or with option --log-out.

If the third parameter or --divisor is specified, it is used as a speed-up multiplier. For example, a speed-up of 2 makes scriptreplay go twice as fast, and a speed-up of 0.1 makes it go ten times slower than the original session.  


-I, --log-in file
File containing script's terminal input.
-O, --log-out file
File containing script's terminal output.
-B, --log-io file
File containing script's terminal output and input.
-t, --timing file
File containing script's timing output. This option overrides old-style arguments.
-T, --log-timing file
aliast to -t, maintained for compatibility with script (1) command line options.
-s, --typescript file
File containing script's terminal output. Deprecated alias to --log-out. This option overrides old-style arguments.
-c, --cr-mode mode
Specifies how to use CR (0x0D, carriage return) character from log files. The default mode is auto, in this case CR is replaced with line break for stdin log, because otherwise scriptreplay will overwrite the same line. The another modes are never and always.
-d, --divisor number
Speed up the replay displaying this number of times. The argument is a floating point number. It's called divisor because it divides the timings by this factor. This option overrides old-style arguments.
-m, --maxdelay number
Set the maximum delay between transcript updates to number of seconds. The argument is a floating point number. This can be used to avoid long pauses in the transcript replay.
Display details about session recorded in the specified timing file and exit. The session has to be recorded by advanced format (see script(1)) option --logging-format for more details).
-x, --stream type
Forces scriptreplay to print only specified stream. The supported stream types are in, out, signal, or info. This option is recommended for multi-stream logs (e.g., --log-io) to print only specified data.
-V, --version
Display version information and exit.
-h, --help
Display help text and exit.


% script --log-timing --log-out script.out
Script started, file is script.out
% ls
<etc, etc>
% exit
Script done, file is script.out
% scriptreplay --log-timing --log-out script.out


script(1), scriptlive(1)  


Copyright © 2008 James Youngman
Copyright © 2008-2019 Karel Zak

This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Released under the GNU General Public License version 2 or later.  


The original scriptreplay program was written by Joey Hess The program was re-written in C by James Youngman and Karel Zak  


The scriptreplay command is part of the util-linux package and is available from Linux Kernel Archive



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