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28 .\" @(#)script.1 8.1 (Berkeley) 6/6/93
29 .\" $FreeBSD: head/usr.bin/script/script.1 314436 2017-02-28 23:42:47Z imp $
36 .Nd make typescript of terminal session
42 .Op Ar file Op Ar command ...
46 utility makes a typescript of everything printed on your terminal.
47 It is useful for students who need a hardcopy record of an interactive
48 session as proof of an assignment, as the typescript file
49 can be printed out later with
58 If no file name is given, the typescript is saved in the file
65 will run the specified command with an optional argument vector
66 instead of an interactive shell.
68 The following options are available:
69 .Bl -tag -width indent
75 retaining the prior contents.
77 When playing back a session with the
79 flag, do not sleep between records when playing back a timestamped session.
81 Immediately flush output after each write.
82 This will allow a user to create a named pipe using
84 and another user may watch the live session using a utility like
87 Log keys sent to the program as well as output.
89 Play back a session recorded with the
93 Run in quiet mode, omit the start, stop and command status messages.
95 Record a session with input, output, and timestamping.
97 Specify the interval at which the script output file will be flushed
102 to flush after every character I/O event.
103 The default interval is
107 The script ends when the forked shell (or command) exits (a
123 Certain interactive commands, such as
125 create garbage in the typescript file.
128 utility works best with commands that do not manipulate the screen.
129 The results are meant to emulate a hardcopy terminal, not an addressable one.
131 The following environment variables are utilized by
133 .Bl -tag -width SHELL
137 environment variable is added to the sub-shell.
140 already existed in the users environment,
141 its value is overwritten within the sub-shell.
150 exists, the shell forked by
155 is not set, the Bourne shell
157 .Pq Most shells set this variable automatically .
177 options first appeared in
186 in the log file, including linefeeds and backspaces.
187 This is not what the naive user expects.
189 It is not possible to specify a command without also naming the script file
190 because of argument parsing compatibility issues.
194 mode, echo cancelling is far from ideal.
195 The slave terminal mode is checked
196 for ECHO mode to check when to avoid manual echo logging.
198 work when the terminal is in a raw mode where
199 the program being run is doing manual echo.
203 reads zero bytes from the terminal, it switches to a mode when it
204 only attempts to read
205 once a second until there is data to read.
208 from spinning on zero-byte reads, but might cause a 1-second delay in
209 processing of user input.