DragonFly On-Line Manual Pages
SCRIPT(1) DragonFly General Commands Manual SCRIPT(1)
script -- make typescript of terminal session
script [-adkpqr] [-F pipe] [-t time] [file [command ...]]
The script utility makes a typescript of everything printed on your
terminal. It is useful for students who need a hardcopy record of an
interactive session as proof of an assignment, as the typescript file can
be printed out later with lpr(1).
If the argument file is given, script saves all dialogue in file. If no
file name is given, the typescript is saved in the file typescript.
If the argument command is given, script will run the specified command
with an optional argument vector instead of an interactive shell.
The following options are available:
-a Append the output to file or typescript, retaining the prior
-d When playing back a session with the -p flag, do not sleep
between records when playing back a timestamped session.
Immediately flush output after each write. This will allow a
user to create a named pipe using mkfifo(1) and another user may
watch the live session using a utility like cat(1).
-k Log keys sent to the program as well as output.
-p Play back a session recorded with the -r flag in real time.
-q Run in quiet mode, omit the start, stop and command status
-r Record a session with input, output, and timestamping.
Specify the interval at which the script output file will be
flushed to disk, in seconds. A value of 0 causes script to flush
after every character I/O event. The default interval is 30
The script ends when the forked shell (or command) exits (a control-D to
exit the Bourne shell (sh(1)), 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. The script utility works best with commands that do not
manipulate the screen. The results are meant to emulate a hardcopy
terminal, not an addressable one.
The following environment variables are utilized by script:
The SCRIPT environment variable is added to the sub-shell. If
SCRIPT already existed in the users environment, its value is
overwritten within the sub-shell. The value of SCRIPT is the name
of the typescript file.
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).
csh(1) (for the history mechanism)
The script command appeared in 3.0BSD.
The -d, -p and -r options first appeared in NetBSD 2.0 and were ported to
The script utility places everything in the log file, including linefeeds
and backspaces. This is not what the naive user expects.
It is not possible to specify a command without also naming the script
file because of argument parsing compatibility issues.
When running in -k mode, echo cancelling is far from ideal. The slave
terminal mode is checked for ECHO mode to check when to avoid manual echo
logging. This does not work when the terminal is in a raw mode where the
program being run is doing manual echo.
If script reads zero bytes from the terminal, it switches to a mode when
it only attempts to read once a second until there is data to read. This
prevents script from spinning on zero-byte reads, but might cause a
1-second delay in processing of user input.
DragonFly 5.3 November 25, 2018 DragonFly 5.3