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28 .\" @(#)script.1 8.1 (Berkeley) 6/6/93
35 .Nd make typescript of terminal session
40 .Op Ar file Op Ar command ...
49 utility makes a typescript of everything printed on your terminal.
50 It is useful for students who need a hardcopy record of an interactive
51 session as proof of an assignment, as the typescript file
52 can be printed out later with
61 If no file name is given, the typescript is saved in the file
68 will run the specified command with an optional argument vector
69 instead of an interactive shell.
71 The following options are available:
72 .Bl -tag -width "-F pipe"
78 retaining the prior contents.
80 When playing back a session with the
82 flag, do not sleep between records when playing back a timestamped session.
84 Accepted for compatibility with
87 The child command exit status is always the exit status of
90 Immediately flush output after each write.
91 This will allow a user to create a named pipe using
93 and another user may watch the live session using a utility like
99 .Pa typescript.filemon
103 Log keys sent to the program as well as output.
105 Play back a session recorded with the
109 Run in quiet mode, omit the start, stop and command status messages.
111 Record a session with input, output, and timestamping.
113 Specify the interval at which the script output file will be flushed
118 to flush after every character I/O event.
119 The default interval is
124 but just reports the time-stamp of each output.
125 This is very useful for assessing the timing of events.
131 characters, it indicates the default format:
132 .Ql %n@ %s [%Y-%m-%d %T]%n ,
133 which is useful for both tools and humans to read, should be used.
134 Note that time-stamps will only be output when different from the
138 The script ends when the forked shell (or command) exits (a
154 Certain interactive commands, such as
156 create garbage in the typescript file.
159 utility works best with commands that do not manipulate the screen.
160 The results are meant to emulate a hardcopy terminal, not an addressable one.
162 The following environment variables are utilized by
164 .Bl -tag -width SCRIPT
168 environment variable is added to the sub-shell.
171 already existed in the users environment,
172 its value is overwritten within the sub-shell.
181 exists, the shell forked by
186 is not set, the Bourne shell
188 .Pq Most shells set this variable automatically .
193 session with no additional details like input, output, and timestamping:
194 .Bd -literal -offset indent
195 $ SHELL=/bin/csh script
196 Script started, output file is typescript
198 Tue Jan 5 15:08:10 UTC 2021
202 Script done, output file is typescript
205 Now, replay the session recorded in the previous example:
206 .Bd -literal -offset indent
208 Script started on Tue Jan 5 15:08:08 2021
210 Tue Jan 5 15:08:10 UTC 2021
214 Script done on Tue Jan 5 15:08:13 2021
219 session, but this time with additional details like timestamping:
220 .Bd -literal -offset indent
221 $ SHELL=/bin/csh script -r
222 Script started, output file is typescript
224 Tue Jan 5 15:17:11 UTC 2021
228 Script done, output file is typescript
231 In order to replay a sessions recorded with the
233 flag, it is necessary to specify
237 will not work because of all the aditional information stored in the session file
241 to print the whole session at once:
242 .Bd -literal -offset indent
243 $ script -dp ./typescript
244 Script started on Tue Jan 5 15:17:09 2021
246 Tue Jan 5 15:17:11 UTC 2021
250 Script done on Tue Jan 5 15:17:14 2021
271 options first appeared in
280 in the log file, including linefeeds and backspaces.
281 This is not what the naive user expects.
283 It is not possible to specify a command without also naming the script file
284 because of argument parsing compatibility issues.
288 mode, echo cancelling is far from ideal.
289 The slave terminal mode is checked
290 for ECHO mode to check when to avoid manual echo logging.
292 work when the terminal is in a raw mode where
293 the program being run is doing manual echo.
297 reads zero bytes from the terminal, it switches to a mode when it
298 only attempts to read
299 once a second until there is data to read.
302 from spinning on zero-byte reads, but might cause a 1-second delay in
303 processing of user input.