ef87c4dcd5
PR: 161088 Submitted by: Ben Kaduk ( kaduk % mit ! edu ) MFC after: 1 week Need-MFC: 225809
183 lines
4.7 KiB
Groff
183 lines
4.7 KiB
Groff
.\" Copyright (c) 1980, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)script.1 8.1 (Berkeley) 6/6/93
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.\" $FreeBSD$
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.\"
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.Dd September 28, 2011
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.Dt SCRIPT 1
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.Os
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.Sh NAME
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.Nm script
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.Nd make typescript of terminal session
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.Sh SYNOPSIS
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.Nm
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.Op Fl akq
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.Op Fl t Ar time
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.Op Ar file Op Ar command ...
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.Sh DESCRIPTION
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The
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.Nm
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utility makes a typescript of everything printed on your terminal.
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It is useful for students who need a hardcopy record of an interactive
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session as proof of an assignment, as the typescript file
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can be printed out later with
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.Xr lpr 1 .
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.Pp
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If the argument
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.Ar file
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is given,
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.Nm
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saves all dialogue in
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.Ar file .
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If no file name is given, the typescript is saved in the file
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.Pa typescript .
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.Pp
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If the argument
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.Ar command
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is given,
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.Nm
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will run the specified command with an optional argument vector
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instead of an interactive shell.
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.Pp
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The following options are available:
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.Bl -tag -width indent
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.It Fl a
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Append the output to
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.Ar file
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or
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.Pa typescript ,
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retaining the prior contents.
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.It Fl k
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Log keys sent to the program as well as output.
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.It Fl q
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Run in quiet mode, omit the start and stop status messages.
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.It Fl t Ar time
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Specify the interval at which the script output file will be flushed
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to disk, in seconds.
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A value of 0
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causes
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.Nm
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to flush after every character I/O event.
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The default interval is
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30 seconds.
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.El
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.Pp
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The script ends when the forked shell (or command) exits (a
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.Em control-D
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to exit
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the Bourne shell
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.Pf ( Xr sh 1 ) ,
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and
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.Em exit ,
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.Em logout
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or
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.Em control-D
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(if
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.Em ignoreeof
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is not set) for the
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C-shell,
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.Xr csh 1 ) .
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.Pp
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Certain interactive commands, such as
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.Xr vi 1 ,
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create garbage in the typescript file.
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The
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.Nm
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utility works best with commands that do not manipulate the screen.
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The results are meant to emulate a hardcopy terminal, not an addressable one.
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.Sh ENVIRONMENT
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The following environment variables are utilized by
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.Nm :
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.Bl -tag -width SHELL
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.It Ev SCRIPT
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The
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.Ev SCRIPT
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environment variable is added to the sub-shell.
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If
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.Ev SCRIPT
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already existed in the users environment,
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its value is overwritten within the sub-shell.
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The value of
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.Ev SCRIPT
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is the name of the
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.Ar typescript
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file.
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.It Ev SHELL
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If the variable
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.Ev SHELL
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exists, the shell forked by
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.Nm
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will be that shell.
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If
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.Ev SHELL
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is not set, the Bourne shell
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is assumed.
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.Pq Most shells set this variable automatically .
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.El
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.Sh SEE ALSO
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.Xr csh 1
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.Po
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for the
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.Em history
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mechanism
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.Pc .
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Bx 3.0 .
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.Sh BUGS
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The
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.Nm
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utility places
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.Sy everything
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in the log file, including linefeeds and backspaces.
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This is not what the naive user expects.
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.Pp
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It is not possible to specify a command without also naming the script file
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because of argument parsing compatibility issues.
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.Pp
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When running in
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.Fl k
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mode, echo cancelling is far from ideal.
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The slave terminal mode is checked
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for ECHO mode to check when to avoid manual echo logging.
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This does not
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work when the terminal is in a raw mode where
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the program being run is doing manual echo.
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.Pp
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If
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.Nm
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reads zero bytes from the terminal, it switches to a mode when it
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only attempts to read
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once a second until there is data to read.
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This prevents
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.Nm
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from spinning on zero-byte reads, but might cause a 1-second delay in
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processing of user input.
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