Provided by: bsdutils_2.40.2-1ubuntu1.1_amd64 bug

NAME

       script - make typescript of terminal session

SYNOPSIS

       script [options] [file]

DESCRIPTION

       script makes a typescript of everything on your terminal session. The terminal data are stored in raw
       form to the log file and information about timing to another (optional) structured log file. The timing
       log file is necessary to replay the session later by scriptreplay(1) and to store additional information
       about the session.

       Since version 2.35, script supports multiple streams and allows the logging of input and output to
       separate files or all the one file. This version also supports a new timing file which records additional
       information. The command scriptreplay --summary then provides all the information.

       If the argument file or option --log-out file is given, script saves the dialogue in this file. If no
       filename is given, the dialogue is saved in the file typescript.

       Note that logging input using --log-in or --log-io may record security-sensitive information as the log
       file contains all terminal session input (e.g., passwords) independently of the terminal echo flag
       setting.

OPTIONS

       Below, the size argument may be followed by the multiplicative suffixes KiB (=1024), MiB (=1024*1024),
       and so on for GiB, TiB, PiB, EiB, ZiB and YiB (the "iB" is optional, e.g., "K" has the same meaning as
       "KiB"), or the suffixes KB (=1000), MB (=1000*1000), and so on for GB, TB, PB, EB, ZB and YB.

       -a, --append
           Append the output to file or to typescript, retaining the prior contents.

       -c, --command command
           Run the command rather than an interactive shell. This makes it easy for a script to capture the
           output of a program that behaves differently when its stdout is not a tty.

       -E, --echo when
           This option controls the ECHO flag for the slave end of the session’s pseudoterminal. The supported
           modes are always, never, or auto.

           The default is auto — in this case, ECHO enabled for the pseudoterminal slave; if the current
           standard input is a terminal, ECHO is disabled for it to prevent double echo; if the current standard
           input is not a terminal (for example pipe: echo date | script) then keeping ECHO enabled for the
           pseudoterminal slave enables the standard input data to be viewed on screen while being recorded to
           session log simultaneously.

           Note that 'never' mode affects content of the session output log, because users input is not repeated
           on output.

       -e, --return
           Return the exit status of the child process. Uses the same format as bash termination on signal
           termination (i.e., exit status is 128 + the signal number). The exit status of the child process is
           always stored in the type script file too.

       -f, --flush
           Flush output after each write. This is nice for telecooperation: one person does mkfifo foo; script
           -f foo, and another can supervise in real-time what is being done using cat foo. Note that flush has
           an impact on performance; it’s possible to use SIGUSR1 to flush logs on demand.

       --force
           Allow the default output file typescript to be a hard or symbolic link. The command will follow a
           symbolic link.

       -B, --log-io file
           Log input and output to the same file. Note, this option makes sense only if --log-timing is also
           specified, otherwise it’s impossible to separate output and input streams from the log file.

       -I, --log-in file
           Log input to the file. The log output is disabled if only --log-in specified.

           Use this logging functionality carefully as it logs all input, including input when terminal has
           disabled echo flag (for example, password inputs).

       -O, --log-out file
           Log output to the file. The default is to log output to the file with name typescript if the option
           --log-out or --log-in is not given. The log output is disabled if only --log-in specified.

       -T, --log-timing file
           Log timing information to the file. Two timing file formats are supported now. The classic format is
           used when only one stream (input or output) logging is enabled. The multi-stream format is used on
           --log-io or when --log-in and --log-out are used together. See also --logging-format.

       -m, --logging-format format
           Force use of advanced or classic timing log format. The default is the classic format to log only
           output and the advanced format when input as well as output logging is requested.

           Classic format
               The timing log contains two fields, separated by a space. The first field indicates how much time
               elapsed since the previous output. The second field indicates how many characters were output
               this time.

           Advanced (multi-stream) format
               The first field is an entry type identifier ('I’nput, 'O’utput, 'H’eader, 'S’ignal). The second
               field is how much time elapsed since the previous entry, and the rest of the entry is
               type-specific data.

       -o, --output-limit size
           Limit the size of the typescript and timing files to size and stop the child process after this size
           is exceeded. The calculated file size does not include the start and done messages that the script
           command prepends and appends to the child process output. Due to buffering, the resulting output file
           might be larger than the specified value.

       -q, --quiet
           Be quiet (do not write start and done messages to standard output).

       -t[file], --timing[=file]
           Output timing data to standard error, or to file when given. This option is deprecated in favour of
           --log-timing where the file argument is not optional.

       -h, --help
           Display help text and exit.

       -V, --version
           Print version and exit.

SIGNALS

       Upon receiving SIGUSR1, script immediately flushes the output files.

ENVIRONMENT

       The following environment variable is utilized by script:

       SHELL
           If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the
           Bourne shell is assumed. (Most shells set this variable automatically).

NOTES

       The script ends when the forked shell exits (a control-D for the Bourne shell (sh(1p)), and exit, logout
       or control-d (if ignoreeof is not set) for the C-shell, csh(1)).

       Certain interactive commands, such as vi(1), create garbage in the typescript file. script works best
       with commands that do not manipulate the screen, the results are meant to emulate a hardcopy terminal.

       It is not recommended to run script in non-interactive shells. The inner shell of script is always
       interactive, and this could lead to unexpected results. If you use script in the shell initialization
       file, you have to avoid entering an infinite loop. You can use for example the .profile file, which is
       read by login shells only:

           if test -t 0 ; then
               script
               exit
           fi

       You should also avoid use of script in command pipes, as script can read more input than you would
       expect.

HISTORY

       The script command appeared in 3.0BSD.

BUGS

       script places everything in the log file, including linefeeds and backspaces. This is not what the naive
       user expects.

       script is primarily designed for interactive terminal sessions. When stdin is not a terminal (for
       example: echo foo | script), then the session can hang, because the interactive shell within the script
       session misses EOF and script has no clue when to close the session. See the NOTES section for more
       information.

SEE ALSO

       csh(1) (for the history mechanism), scriptreplay(1), scriptlive(1)

REPORTING BUGS

       For bug reports, use the issue tracker at https://github.com/util-linux/util-linux/issues.

AVAILABILITY

       The script command is part of the util-linux package which can be downloaded from Linux Kernel Archive
       <https://www.kernel.org/pub/linux/utils/util-linux/>.