1tlog-rec(8) System Manager's Manual tlog-rec(8)
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6 tlog-rec - record terminal I/O of a program or a user shell
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10 tlog-rec [OPTION...] [CMD_FILE [CMD_ARG...]]
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14 Tlog-rec is a terminal I/O logging program. It starts a program under a
15 pseudo-TTY, connects it to the actual terminal and logs whatever passes
16 between them including user input, program output, and terminal window
17 size changes.
18 CMD_FILE argument specifies the program to run and record. If CMD_FILE
20 contains a slash (/) character, then it is assumed to contain a path to
21 the program to run. Otherwise a program file with CMD_FILE name is
22 searched for in directories specified with the PATH environment vari‐
23 able. If this variable is not set, then the current directory is
24 searched, followed by the system-default directories output by "getconf
25 CS_PATH", which is usually "/bin:/usr/bin".
26 CMD_ARG arguments are used as arguments to the program to run and
28 record.
29 If no non-option arguments are specified, then tlog-rec starts and
31 records a user shell specified with the SHELL environment variable, or
32 if that is not set, it starts the shell specified in the NSS database
33 for the user tlog-rec runs as.
34 Tlog-rec loads its parameters first from the system-wide configuration
36 file /etc/tlog/tlog-rec.conf, then from the file pointed at by
37 TLOG_REC_CONF_FILE environment variable (if set), then from the con‐
38 tents of the TLOG_REC_CONF_TEXT environment variable (if set), and then
39 from command-line options. Parameters from each of these sources over‐
40 ride the previous one in turn.
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44 General options
45 -h, --help
46 Output a command-line usage message and exit.
47 -v, --version
52 Output version information and exit.
53 --configuration
58 Output program configuration in JSON and exit.
59 --latency=SECONDS
64 Cache captured data SECONDS seconds before logging.
65 SECONDS is the number of seconds to cache captured data for
67 before logging. The encoded data which does not reach payload
68 size stays in memory and is not logged until this number of sec‐
69 onds elapses.
70 Value minimum: 1
72 --payload=BYTES
74 Limit encoded data to BYTES bytes.
75 BYTES is the maximum encoded data (payload) size per message,
77 bytes. As soon as payload exceeds this number of bytes, it is
78 formatted into a message and logged.
79 Value minimum: 32
81 -w, --writer=STRING
83 Use STRING log writer (journal/syslog/file, default file).
84 STRING is the type of "log writer" to use for logging. The
86 writer needs to be configured using its dedicated parameters.
87 Value should be one of: "journal", "syslog", "file"
89 --semaphore=FILE
91 Write "READY" to FILE when recording is setup.
92 FILE is a path to a "semaphore" file to write string "READY" to,
94 when the recording setup is done, and I/O can be passed to and
95 from the recorded program.
96 Logged data set options
99 --log-input[=BOOL]
100 Enable/disable logging user input.
101 If specified as true, user input is logged.
103 --log-output[=BOOL]
106 Enable/disable logging program output.
107 If specified as true, terminal output is logged.
109 --log-window[=BOOL]
112 Enable/disable logging terminal window size changes.
113 If specified as true, terminal window size changes are logged.
115 Logging limit options
118 --limit-rate=NUMBER
119 Set logging rate limit to NUMBER of message bytes/sec.
120 NUMBER is the maximum rate messages could be logged at,
122 bytes/sec.
123 Value minimum: 0
125 --limit-burst=NUMBER
127 Set logging burst limit to NUMBER of message bytes.
128 NUMBER is the number of bytes by which logged messages are
130 allowed to exceed the rate limit momentarily, i.e. "burstiness".
131 Value minimum: 0
133 --limit-action=STRING
135 Perform STRING action above limits (pass/delay/drop).
136 STRING is the logging limit action. If set to "pass" no logging
138 limits will be applied. If set to "delay", logging will be
139 throttled. If set to "drop", messages exceeding limits will be
140 dropped.
141 Value should be one of: "pass", "delay", "drop"
143 File writer options
145 -o, --file-path=FILE
146 Log to FILE file.
147 FILE is the "file" writer log file path.
149 Syslog writer options
152 --syslog-facility=STRING
153 Log with STRING syslog facility.
154 STRING is the syslog facility "syslog" writer should use for
156 messages.
157 Value should be one of: "auth", "authpriv", "cron", "daemon",
159 "ftp", "kern", "local0", "local1", "local2", "local3", "local4",
160 "local5", "local6", "local7", "lpr", "mail", "news", "syslog",
161 "user", "uucp"
162 --syslog-priority=STRING
164 Log with STRING syslog priority.
165 STRING is the syslog priority "syslog" writer should use for
167 messages.
168 Value should be one of: "emerg", "alert", "crit", "err", "warn‐
170 ing", "notice", "info", "debug"
171 Journal writer options
173 --journal-priority=STRING
174 Log with STRING syslog-style priority.
175 STRING is the syslog-style priority "journal" writer should use
177 for messages.
178 Value should be one of: "emerg", "alert", "crit", "err", "warn‐
180 ing", "notice", "info", "debug"
181 --journal-augment[=BOOL]
183 Enable/disable adding extra journal fields.
184 If specified as true, the "journal" writer copies the following
186 JSON fields to Journal fields: user -> TLOG_USER, session ->
187 TLOG_SESSION, rec -> TLOG_REC, and id -> TLOG_ID.
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193 TLOG_REC_CONF_FILE
194 Specifies the location of a configuration file to be read. The
195 configuration parameters in this file override the ones in the
196 system-wide configuration file /etc/tlog/tlog-rec.conf.
197 TLOG_REC_CONF_TEXT
200 Specifies the configuration text to be read. The configuration
201 parameters in this variable override the ones in the file speci‐
202 fied with TLOG_REC_CONF_FILE.
203 SHELL Specifies the shell to run, if no positional arguments are found
206 on the command line.
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210 /etc/tlog/tlog-rec.conf
211 The system-wide configuration file
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215 Record a vim session to a file:
216 tlog-rec -o vim.log vim
217 Record user input only:
220 tlog-rec --log-input=on --log-output=off --log-window=off
221 Record with minimal latency:
224 tlog-rec --latency=1
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228 tlog-rec.conf(5), tlog-rec-session(8), tlog-play(8)
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232 Nikolai Kondrashov <spbnick@gmail.com>
233Tlog May 2017 tlog-rec(8)