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foot(1) General Commands Manual foot(1) NAME foot - Wayland terminal emulator SYNOPSIS foot [OPTIONS] foot [OPTIONS] <command> [COMMAND OPTIONS] All trailing (non-option) arguments are treated as a command, and its arguments, to execute (instead of the default shell). DESCRIPTION foot is a Wayland terminal emulator. Running it without arguments will start a new terminal window with your default shell. You can override the default shell by appending a custom command to the foot command line foot htop OPTIONS -c,--config=PATH Path to configuration file, see foot.ini(5) for details. -C,--check-config Verify configuration and then exit with 0 if ok, otherwise exit with 230 (see EXIT STATUS). -o,--override=[SECTION.]KEY=VALUE Override an option set in the configuration file. If SECTION is not given, defaults to main. -f,--font=FONT Comma separated list of fonts to use, in fontconfig format (see FONT FORMAT). The first font is the primary font. The remaining fonts are fall- back fonts that will be used whenever a glyph cannot be found in the primary font. The fallback fonts are searched in the order they appear. If a glyph cannot be found in any of the fallback fonts, the dynamic fallback list from fontconfig (for the primary font) is searched. Default: monospace. -w,--window-size-pixels=WIDTHxHEIGHT Set initial window width and height, in pixels. Default: 700x500. -W,--window-size-chars=WIDTHxHEIGHT Set initial window width and height, in characters. Default: not set. -t,--term=TERM Value to set the environment variable TERM to (see TERMINFO and EN- VIRONMENT). Default: foot. -T,--title=TITLE Initial window title. Default: foot. -a,--app-id=ID Value to set the app-id property on the Wayland window to. Default: foot (normal mode), or footclient (server mode). -m,--maximized Start in maximized mode. If both --maximized and --fullscreen are specified, the last one takes precedence. -F,--fullscreen Start in fullscreen mode. If both --maximized and --fullscreen are specified, the last one takes precedence. -L,--login-shell Start a login shell, by prepending a '-' to argv[0]. --pty Display an existing pty instead of creating one. This is useful for interacting with VM consoles. This option is not currently supported in combination with -s,--server. -D,--working-directory=DIR Initial working directory for the client application. Default: CWD of foot. -s,--server[=PATH|FD] Run as a server. In this mode, a single foot instance hosts multi- ple terminals (windows). Use footclient(1) to launch new terminals. This saves some memory since for example fonts and glyph caches can be shared between the terminals. It also saves upstart time since the config has already been loaded and parsed, and most importantly, fonts have already been loaded (and their glyph caches are likely to already have been populated). Each terminal will have its own rendering threads, but all Wayland communication, as well as input/output to the shell, is multiplexed in the main thread. Thus, this mode might result in slightly worse performance when multiple terminals are under heavy load. Also be aware that should one terminal crash, it will take all the others with it. The default path is $XDG_RUNTIME_DIR/foot-$WAYLAND_DISPLAY.sock. If $XDG_RUNTIME_DIR is not set, the default path is instead /tmp/foot.sock. If $XDG_RUNTIME_DIR is set, but $WAYLAND_DISPLAY is not, the de- fault path is $XDG_RUNTIME_DIR/foot.sock. Note that if you change the default, you will also need to use the --server-socket option in footclient(1) and point it to your custom socket path. If the argument is a number, foot will interpret it as the file de- scriptor of a socket provided by a supervision daemon (such as sys- temd or s6), and use that socket as it's own. Two systemd units (foot-server.{service,socket}) are provided to use that feature with systemd. To use socket activation, only en- able the socket unit. Note that starting foot --server as a systemd service will use the environment of the systemd user instance; thus, you'll need to im- port $WAYLAND_DISPLAY in it using systemctl --user import-environ- ment WAYLAND_DISPLAY. -H,--hold Remain open after child process exits. -p,--print-pid=FILE|FD Print PID to this file, or FD, when successfully started. The file (or FD) is closed immediately after writing the PID. When a FILE as been specified, the file is unlinked at exit. This option can only be used in combination with -s,--server. -d,--log-level={info,warning,error,none} Log level, used both for log output on stderr as well as syslog. Default: warning. -l,--log-colorize=[{never,always,auto}] Enables or disables colorization of log output on stderr. Default: auto. -S,--log-no-syslog Disables syslog logging. Logging is only done on stderr. This op- tion can only be used in combination with -s,--server. -v,--version Show the version number and quit. -e Ignored; for compatibility with xterm -e. This option was added in response to several program launchers passing -e to arbitrary terminals, under the assumption that they all implement the same semantics for it as xterm(1). Ignoring it allows foot to be invoked as e.g. foot -e man foot with the same results as with xterm, instead of producing an "invalid option" er- ror. KEYBOARD SHORTCUTS The following keyboard shortcuts are available by default. They can be changed in foot.ini(5). There are also more actions (disabled by de- fault) available; see foot.ini(5). NORMAL MODE shift+page up/page down Scroll up/down in history ctrl+shift+c, XF86Copy Copy selected text to the clipboard ctrl+shift+v, XF86Paste Paste from clipboard shift+insert Paste from the primary selection ctrl+shift+r Start a scrollback search ctrl++, ctrl+= Increase font size ctrl+- Decrease font size ctrl+0 Reset font size ctrl+shift+n Spawn a new terminal. If the shell has been configured to emit the OSC 7 escape sequence, the new terminal will start in the current working directory. ctrl+shift+o Activate URL mode, allowing you to "launch" URLs. ctrl+shift+u Activate Unicode input. ctrl+shift+z Jump to the previous, currently not visible, prompt. Requires shell integration. ctrl+shift+x Jump to the next prompt. Requires shell integration. SCROLLBACK SEARCH These keyboard shortcuts affect the search selection: ctrl+r Search backward for the next match. If the search string is empty, the last searched-for string is used. ctrl+s Search forward for the next match. If the search string is empty, the last searched-for string is used. shift+right Extend current selection to the right by one character. shift+left Extend current selection to the left by one character. ctrl+w, ctrl+shift+right Extend current selection (and thus the search criteria) to the end of the word, or the next word if currently at a word separating character. ctrl+shift+w Same as ctrl+w, except that the only word separating characters are whitespace characters. ctrl+shift+left Extend current selection to the left to the last word boundary. ctrl+shift+w Extend the current selection to the right to the last whitespace. shift+down Extend current selection down one line shift+up Extend current selection up one line. ctrl+v, ctrl+shift+v, ctrl+y, XF86Paste Paste from clipboard into the search buffer. shift+insert Paste from primary selection into the search buffer. escape, ctrl+g, ctrl+c Cancel the search return Finish the search and copy the current match to the primary selec- tion. The terminal selection is kept, allowing you to press ctrl+shift+c to copy it to the clipboard. These shortcuts affect the search box in scrollback-search mode: ctrl+b Moves the cursor in the search box one character to the left. ctrl+left, alt+b Moves the cursor in the search box one word to the left. ctrl+f Moves the cursor in the search box one character to the right. ctrl+right, alt+f Moves the cursor in the search box one word to the right. Home, ctrl+a Moves the cursor in the search box to the beginning of the input. End, ctrl+e Moves the cursor in the search box to the end of the input. alt+backspace, ctrl+backspace Deletes the word before the cursor. alt+delete, ctrl+delete Deletes the word after the cursor. ctrl+u Deletes from the cursor to the start of the input ctrl+k Deletes from the cursor to the end of the input These shortcuts affect scrolling in scrollback-search mode: shift+page-up Scrolls up/back one page in history. shift+page-down Scroll down/forward one page in history. URL MODE t Toggle URL visibility in jump label. escape, ctrl+g, ctrl+c, ctrl+d Exit URL mode without launching a URL. MOUSE SHORTCUTS left, single-click Drag to select; when released, the selected text is copied to the primary selection. This feature is normally disabled whenever the client has enabled mouse tracking, but can be forced by holding shift. Holding ctrl will create a block selection. left, double-click Selects the word (separated by spaces, period, comma, parenthesis etc) under the pointer. Hold ctrl to select everything under the pointer up to, and until, the next space characters. left, triple-click Selects the everything between enclosing quotes, or the entire row if not inside a quote. left, quad-click Selects the entire row middle Paste from the primary selection right Extend current selection. Clicking immediately extends the selec- tion, while hold-and-drag allows you to interactively resize the selection. ctrl+right Extend the current selection, but force it to be character wise, rather than depending on the original selection mode. wheel Scroll up/down in history ctrl+wheel Increase/decrease font size TOUCHSCREEN tap Emulates mouse left button click. drag Scrolls up/down in history. Holding for a while before dragging (time delay can be configured) emulates mouse dragging with left button held. FONT FORMAT The font is specified in FontConfig syntax. That is, a colon-separated list of font name and font options. Examples: • Dina:weight=bold:slant=italic • Courier New:size=12 URLs Foot supports URL detection. But, unlike many other terminal emulators, where URLs are highlighted when they are hovered and opened by clicking on them, foot uses a keyboard driven approach. Pressing ctrl+shift+o enters "Open URL mode", where all currently visi- ble URLs are underlined, and is associated with a "jump-label". The jump-label indicates the key sequence (e.g. "AF") to use to activate the URL. The key binding can, of course, be customized, like all other key bind- ings in foot. See show-urls-launch and show-urls-copy in foot.ini(5). show-urls-launch by default opens the URL with xdg-open. This can be changed with the url-launch option. show-urls-copy is an alternative to show-urls-launch, that changes what activating a URL does; instead of opening it, it copies it to the clip- board. It is unbound by default. Jump label colors, the URL underline color, and the letters used in the jump label key sequences can be configured. ALT/META CHARACTERS By default, foot prefixes meta characters with ESC. This corresponds to XTerm's metaSendsEscape option set to true. This can be disabled programmatically with E[?1036l (and enabled again with E[?1036h). When disabled, foot will instead set the 8:th bit of meta character and then UTF-8 encode it. This corresponds to XTerm's eightBitMeta option set to true. This can also be disabled programmatically with rmm (Reset Meta Mode, E[?1034l), and enabled again with smm (Set Meta Mode, E[?1034h). BACKSPACE Foot transmits DEL (^?) on backspace. This corresponds to XTerm's backarrowKey option set to false, and to DECBKM being reset. To instead transmit BS (^H), press ctrl+backspace. Note that foot does not implement DECBKM, and that the behavior de- scribed above cannot be changed. Finally, pressing alt will prefix the transmitted byte with ESC. KEYPAD By default, Num Lock overrides the run-time configuration keypad mode; when active, the keypad is always considered to be in numerical mode. This corresponds to XTerm's numLock option set to true. In this mode, the keypad keys always sends either numbers (Num Lock is active) or cursor movement keys (up, down, left, right, page up, page down etc). This can be disabled programmatically with E[?1035l (and enabled again with E[?1035h). When disabled, the keypad sends custom escape sequences instead of num- bers, when in application mode. CONFIGURATION foot will search for a configuration file in the following locations, in this order: • XDG_CONFIG_HOME/foot/foot.ini (defaulting to $HOME/.con- fig/foot/foot.ini if unset) • XDG_CONFIG_DIRS/foot/foot.ini (defaulting to /usr/lo- cal/etc/xdg/foot/foot.ini if unset) An example configuration file containing all options with their default value commented out will usually be installed to /usr/lo- cal/etc/xdg/foot/foot.ini. For more information, see foot.ini(5). SHELL INTEGRATION Current working directory New foot terminal instances (bound to ctrl+shift+n by default) will open in the current working directory, if the shell in the "parent" terminal reports directory changes. This is done with the OSC-7 escape sequence. Most shells can be scripted to do this, if they do not support it natively. See the wiki (https://codeberg.org/dnkl/foot/wiki#user-content-spawning-new-termi- nal-instances-in-the-current-working-directory) for details. Jumping between prompts Foot can move the current viewport to focus prompts of already executed commands (bound to ctrl+shift+z/x by default). For this to work, the shell needs to emit an OSC-133;A (\E]133;A\E\\) sequence before each prompt. In zsh, one way to do this is to add a precmd hook: precmd() { print -Pn "\e]133;A\e\\" } See the wiki (https://codeberg.org/dnkl/foot/wiki#user-content-jumping- between-prompts) for details, and examples for other shells. Piping last command's output The key binding pipe-command-output can pipe the last command's output to an application of your choice (similar to the other pipe-* key bind- ings): [key-bindings] pipe-command-output=[sh -c "f=$(mktemp); cat - > $f; footclient emacsclient -nw $f; rm $f"] Control+Shift+g When pressing ctrl+shift+g, the last command's output is written to a temporary file, then an emacsclient is started in a new footclient in- stance. The temporary file is removed after the footclient instance has closed. For this to work, the shell must emit an OSC-133;C (\E]133;C\E\\) se- quence before command output starts, and an OSC-133;D (\E]133;D\E\\) when the command output ends. In fish, one way to do this is to add preexec and postexec hooks: function foot_cmd_start --on-event fish_preexec echo -en "\e]133;C\e\\" end function foot_cmd_end --on-event fish_postexec echo -en "\e]133;D\e\\" end See the wiki (https://codeberg.org/dnkl/foot/wiki#user-content-piping- last-commands-output) for details, and examples for other shells TERMINFO Client applications use the terminfo identifier specified by the envi- ronment variable TERM (set by foot) to determine terminal capabilities. Foot has two terminfo definitions: foot and foot-direct, with foot be- ing the default. The difference between the two is in the number of colors they de- scribe; foot describes 256 colors and foot-direct 16.7 million colors (24-bit truecolor). Note that using the foot terminfo does not limit the number of usable colors to 256; applications can still use 24-bit RGB colors. In fact, most applications work best with foot (including 24-bit colors). Using *-direct terminfo entries has been known to crash some ncurses applica- tions even. There are however applications that need a *-direct terminfo entry for 24-bit support. Emacs is one such example. While using either foot or foot-direct is strongly recommended, it is possible to use e.g. xterm-256color as well. This can be useful when remoting to a system where foot's terminfo entries cannot easily be in- stalled. Note that terminfo entries can be installed in the user's home direc- tory. I.e. if you do not have root access, or if there is no distro package for foot's terminfo entries, you can install foot's terminfo entries manually, by copying foot and foot-direct to ~/.terminfo/f/. XTGETTCAP XTGETTCAP is an escape sequence initially introduced by XTerm, and also implemented (and extended, to some degree) by Kitty. It allows querying the terminal for terminfo classic, file-based, ter- minfo definition. For example, if all applications used this feature, you would no longer have to install foot's terminfo on remote hosts you SSH into. XTerm's implementation (as of XTerm-370) only supports querying key (as in keyboard keys) capabilities, and three custom capabilities: • TN - terminal name • Co - number of colors (alias for the colors capability) • RGB - number of bits per color channel (different semantics from the RGB capability in file-based terminfo definitions!). Kitty has extended this, and also supports querying all integer and string capabilities. Foot supports this, and extends it even further, to also include boolean capabilities. This means foot's entire terminfo can be queried via XTGETTCAP. Note that both Kitty and foot handles responses to multi-capability queries slightly differently, compared to XTerm. XTerm will send a single DCS reply, with ;-separated capability/value pairs. There are a couple of issues with this: • The success/fail flag in the beginning of the response is always 1 (success), unless the very first queried capability is invalid. • XTerm will not respond at all to an invalid capability, unless it's the first one in the XTGETTCAP query. • XTerm will end the response at the first invalid capability. In other words, if you send a large multi-capability query, you will only get responses up to, but not including, the first invalid capabil- ity. All subsequent capabilities will be dropped. Kitty and foot on the other hand, send one DCS response for each capa- bility in the multi query. This allows us to send a proper success/fail flag for each queried capability. Responses for all queried capabili- ties are always sent. No queries are ever dropped. EXIT STATUS Foot will exit with code 230 if there is a failure in foot itself. In all other cases, the exit code is that of the client application (i.e. the shell). ENVIRONMENT Variables used by foot SHELL The default child process to run, when no command argument is spec- ified and the shell option in foot.ini(5) is not set. HOME Used to determine the location of the configuration file, see foot.ini(5) for details. XDG_CONFIG_HOME Used to determine the location of the configuration file, see foot.ini(5) for details. XDG_CONFIG_DIRS Used to determine the location of the configuration file, see foot.ini(5) for details. XDG_RUNTIME_DIR Used to construct the default PATH for the --server option, when no explicit argument is given (see above). WAYLAND_DISPLAY Used to construct the default PATH for the --server option, when no explicit argument is given (see above). XCURSOR_THEME The name of the Xcursor(3) theme to use for pointers (typically set by the Wayland compositor). XCURSOR_SIZE The size to use for Xcursor(3) pointers (typically set by the Way- land compositor). Variables set in the child process TERM terminfo/termcap identifier. This is used by client applications to determine which capabilities a terminal supports. The value is set according to either the --term command-line option or the term con- fig option in foot.ini(5). COLORTERM This variable is set to truecolor, to indicate to client applica- tions that 24-bit RGB colors are supported. PWD Current working directory (at the time of launching foot) SHELL Set to the launched shell, if the shell is valid (it is listed in /usr/local/etc/shells). In addition to the variables listed above, custom environment variables may be defined in foot.ini(5). Variables *unset* in the child process TERM_PROGRAM TERM_PROGRAM_VERSION These environment variables are set by certain other terminal emu- lators. We unset them, to prevent applications from misdetecting foot. In addition to the variables listed above, custom environment variables to unset may be defined in foot.ini(5). BUGS Please report bugs to https://codeberg.org/dnkl/foot/issues Before you open a new issue, please search existing bug reports, both open and closed ones. Chances are someone else has already reported the same issue. The report should contain the following: • Foot version (foot --version). • Log output from foot (run foot -d info from another terminal). • Which Wayland compositor (and version) you are running. • If reporting a crash, please try to provide a bt full backtrace with symbols. • Steps to reproduce. The more details the better. IRC #foot on irc.libera.chat SEE ALSO foot.ini(5), footclient(1) 2025-04-12 foot(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | KEYBOARD SHORTCUTS | FONT FORMAT | URLs | ALT/META CHARACTERS | BACKSPACE | KEYPAD | CONFIGURATION | SHELL INTEGRATION | TERMINFO | XTGETTCAP | EXIT STATUS | ENVIRONMENT | BUGS | IRC | SEE ALSO
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