1fish_key_reader(1) fish fish_key_reader(1)
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6 fish_key_reader
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9 Synopsis
10 fish_key_reader [OPTIONS]
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12 Description
13 fish_key_reader is used to study input received from the terminal and
14 can help with key binds. The program is interactive and works on
15 standard input. Individual characters themselves and their hexadecimal
16 values are displayed.
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18 The tool will write an example bind command matching the character
19 sequence captured to stdout. If the character sequence matches a
20 special key name (see bind --key-names), both bind CHARS ... and bind
21 -k KEYNAME ... usage will be shown. Additional details about the
22 characters received, such as the delay between chars, are written to
23 stderr.
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25 The following options are available:
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27 · -c or --continuous begins a session where multiple key sequences can
28 be inspected. By default the program exits after capturing a single
29 key sequence.
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31 · -d or --debug-level=DEBUG_LEVEL enables debug output and specifies a
32 verbosity level (like fish -d). Defaults to 0.
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34 · -D or --debug-stack-frames=DEBUG_LEVEL specify how many stack frames
35 to display when debug messages are written. The default is zero. A
36 value of 3 or 4 is usually sufficient to gain insight into how a
37 given debug call was reached but you can specify a value up to 128.
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39 · -h or --help prints usage information.
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41 · -v or --version prints fish_key_reader's version and exits.
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43 Usage Notes
44 The delay in milliseconds since the previous character was received is
45 included in the diagnostic information written to stderr. This
46 information may be useful to determine the optimal fish_escape_delay_ms
47 setting or learn the amount of lag introduced by tools like ssh, mosh
48 or tmux.
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50 fish_key_reader intentionally disables handling of many signals. To
51 terminate fish_key_reader in --continuous mode do:
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53 · press Ctrl-C twice, or
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55 · press Ctrl-D twice, or
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57 · type exit, or
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59 · type quit
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61Version 3.0.2 Thu Jul 25 2019 fish_key_reader(1)