terminal emulator support
This commit is contained in:
Dylan Araps
parent
9f08795a37
commit
67003d91b1
130
pfetch
130
pfetch
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@ -240,10 +240,6 @@ get_kernel() {
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esac
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}
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get_shell() {
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log shell "${SHELL##*/}" >&6
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}
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get_host() {
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case $os in
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Linux*)
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@ -576,6 +572,130 @@ get_memory() {
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log memory "${mem_used:-?}M / ${mem_full:-?}M" >&6
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}
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get_term() {
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# Workaround for macOS systems that don't support the
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# "algorithm" of obtaining the terminal program name.
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#
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# This also doubles as a means of allowing the user to
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# set whatever value they like here through the
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# '$TERM_PROGRAM' environment variable.
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case $TERM_PROGRAM in
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iTerm.app) term=iTerm2 ;;
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Terminal.app) term='Apple Terminal' ;;
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Hyper) term=HyperTerm ;;
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*) term=${TERM_PROGRAM%%.app} ;;
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esac
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# Special case for TosWin2 (FreeMiNT) which doesn't
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# support the "algorithm" of obtaining the terminal
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# program name.
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[ "$TERM" = tw52 ] || [ "$TERM" = tw100 ] &&
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term=TosWin2
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# Special case for when 'pfetch' is run over SSH.
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[ "$SSH_CONNECTION" ] &&
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term=$SSH_TTY
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# This surprisingly reliable method of detecting the current
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# terminal emulator is kinda neat.
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#
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# It works by looping through each parent of each process
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# starting with '$PPID' (the parent process ID) until we
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# find a match or hit PID 1 (init).
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#
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# On each iteration the name of the current parent process
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# is checked against a list of good values and bad values.
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# If no match is found we check the parent of the parent
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# and so on.
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#
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# Using this method *no* terminal emulator names are
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# hardcoded and the list remains small and general. In short
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# it's basically a list of what *isn't* a terminal emulator
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# and a list of places we should *stop*.
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while [ -z "$term" ]; do
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# This block is OS-specific and handles the fetching of
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# the parent process (of the parent) and the fetching of
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# said process' name.
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case $os in
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Linux*)
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# On Linux some implementation of 'ps' aren't POSIX
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# compliant, thankfully Linux provides this information
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# though the '/proc' filesystem.
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#
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# This loops line by line over the '/proc/PID/status'
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# file splitting at ':' and '<TAB>', we then look for
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# the key containing 'PPid' and grab the value.
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while IFS=': ' read -r key val; do
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case $key in
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PPid)
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ppid=$val
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break
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;;
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esac
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done < "/proc/${ppid:-$PPID}/status"
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# Get the name of the parent process.
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read -r name < "/proc/$ppid/comm"
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;;
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Windows*)
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# I need some assistance to add Windows support
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# as the 'ps' command used in MINGW, MSYS and CYGWIN
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# isn't POSIX compliant(?).
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return
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;;
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*)
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# POSIX compliant 'ps' makes this really easy,
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# just two simple commands to grab the parent
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# process ID and the ID's name.
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ppid=$(ps -p "${ppid:-$PPID}" -o ppid=)
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name=$(ps -p "$ppid" -o comm=)
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;;
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esac
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# Check the parent process name against a list of good and bad
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# values. On a bad value we either keep iterating up the parent
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# process list or we stop altogether (PID 1 for example).
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case $name in
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# If the parent process name matches the user's shell (or
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# anything that looks like a shell), do another iteration.
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#
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# This also includes 'screen' and anything that looks like
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# 'su' or 'sudo'.
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${SHELL##*/} | *sh | screen | su* ) ;;
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# If the parent process name matches 'login', 'init' or
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# '*Login*' we're most likely in the TTY and not a graphical
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# session. In this case 'term' is set to the current TTY and
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# we end here.
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login* | *Login* | init)
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term=$(tty)
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;;
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# If the parent process name matches anything in this list
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# we can no longer continue. We've either hit PID 1 or a parent
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# which *won't* lead to the terminal emulator's PID.
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ruby | systemd | python* | 1 | sshd* | tmux* |\
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USER*PID* | kdeinit* | launchd* | '' )
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break
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;;
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# If none of the above have matched we've reached the terminal
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# emulator's PID and we can end here.
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*)
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term=${name##*/}
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;;
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esac
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done
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[ "$term" ] && log term "$term" >&6
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}
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get_shell() {
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log shell "${SHELL##*/}" >&6
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}
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get_ascii() {
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# This is a simple function to read the contents of
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# an ascii file from 'stdin'. It allows for the use
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@ -1050,7 +1170,7 @@ main() {
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# Disable globbing and set the positional parameters to the
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# contents of 'PF_INFO'.
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set -f
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set +f ${PF_INFO-ascii title os host kernel uptime pkgs memory}
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set +f ${PF_INFO-ascii title os host kernel term uptime pkgs memory}
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# Iterate over the info functions to determine the lengths of the
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# "info names" for output alignment. The option names and subtitles
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