iankelling.org Git - distro-setup/blob - brc

   1 #!/bin/bash
   2 # Copyright (C) 2019 Ian Kelling
   3 # SPDX-License-Identifier: AGPL-3.0-or-later
   4 # this gets sourced. shebang is just for file mode detection
   5
   6 # Use source ~/.bashrc instead of doing bash -l when running a script
   7 # so this can set extdebug and avoid the bash debugger.
   8
   9
  10 if [[ -s /a/bin/errhandle/err ]]; then
  11   # shellcheck source=/a/bin/errhandle/err
  12   source /a/bin/errhandle/err
  13   # wtf, shellcheck doesn't allow disabling warnings in elifs
  14 else
  15   # bleh shellcheck can't handle disabling in an elif, so nesting this if.
  16   # shellcheck disable=SC2154 # set in .bashrc
  17   if [[ -s $bashrc_dir/err ]]; then
  18     # shellcheck source=/a/bin/errhandle/err
  19     source $bashrc_dir/err
  20   fi
  21 fi
  22
  23 # In t8, it runs clear_console for login shells by default. I don't want
  24 # my console cleared. And linux ttys get cleared without this.
  25 if shopt login_shell >/dev/null && [[ -e ~/.bash_logout ]]; then
  26   rm ~/.bash_logout
  27 fi
  28
  29 # if [[ -s /usr/share/bash-completion/completions/git ]]; then
  30 #   source /usr/share/bash-completion/completions/git
  31 # fi
  32 # if [[ -s /usr/share/bash-completion/completions/gitk ]]; then
  33 #   source /usr/share/bash-completion/completions/gitk
  34 # fi
  35
  36 # for testing error catching:
  37 # t2() {
  38 #   echo t2
  39 #   grep sdf sdfd
  40 #   echo wtf
  41 # }
  42 # t1() {
  43 #   echo t1
  44 #   t2 a b c
  45 # }
  46
  47 # * settings
  48
  49 CDPATH=.
  50
  51
  52 # remove all aliases. aliases provided by the system tend to get in the way,
  53 # for example, error happens if I try to define a function the same name as an alias
  54 unalias -a
  55
  56 # remove gnome keyring warning messages
  57 # there is probably a more proper way, but I didnt find any easily on google
  58 # now using xfce+xmonad instead of vanilla xmonad, so disabling this
  59 #unset GNOME_KEYRING_CONTROL
  60
  61 # use extra globing features.
  62 shopt -s extglob
  63 # include .files when globbing, but ignore files name . and ..
  64 # setting this also sets dotglob.
  65 export GLOBIGNORE="*/.:*/.."
  66
  67 # Useful info. see man bash.
  68 PS4='$LINENO+ '
  69
  70
  71 # broken with bash_completion package. Saw a bug for this once. dont anymore.
  72 # still broken in wheezy
  73 # still buggered in latest stable from the web, version 2.1
  74 # perhaps its fixed in newer git version, which fails to make for me
  75 # this note is from 6-2014.
  76 # still broken in flidas.
  77 #shopt -s nullglob
  78
  79 # make tab on an empty line do nothing
  80 shopt -s no_empty_cmd_completion
  81
  82 # fix spelling errors for cd, only in interactive shell
  83 shopt -s cdspell
  84 # append history instead of overwritting it
  85 shopt -s histappend
  86 # for compatibility, per gentoo/debian bashrc
  87 shopt -s checkwinsize
  88 # attempt to save multiline single commands as single history entries.
  89 shopt -s cmdhist
  90 # enable **
  91 shopt -s globstar
  92
  93
  94 # inside emacs fixes
  95 if [[ $LC_INSIDE_EMACS ]]; then
  96   # EMACS is used by bash on startup, but we dont need it anymore.
  97   # plus I hit a bug in a makefile which inherited it
  98   unset EMACS
  99   export LC_INSIDE_EMACS
 100   export PAGER=cat
 101   export MANPAGER=cat
 102   # scp completion does not work, but this doesnt fix it. todo, figure this out
 103   #complete -r scp &> /dev/null
 104   # todo, remote file completion fails, figure out how to turn it off
 105   export NODE_DISABLE_COLORS=1
 106   # This gets rid of ugly terminal escape chars in node repl
 107   # sometime, Id like to have completion working in emacs shell for node
 108   # the offending chars can be found in lib/readline.js,
 109   # things that do like:
 110   # stream.write('\x1b[' + (x + 1) + 'G');
 111   # We can remove them and keep readline, for example by doing this
 112   # to start a repl:
 113   #!/usr/bin/env nodejs
 114   # var readline = require('readline');
 115   # readline.cursorTo = function(a,b,c) {};
 116   # readline.clearScreenDown = function(a) {};
 117   # const repl = require('repl');
 118   # var replServer = repl.start('');
 119   #
 120   # no prompt, or else readline complete seems to be confused, based
 121   # on our column being different? node probably needs to send
 122   # different kind of escape sequence that is not ugly. Anyways,
 123   # completion doesnt work yet even with the ugly prompt, so whatever
 124   #
 125   export NODE_NO_READLINE=1
 126
 127 fi
 128
 129 export SSH_CONFIG_FILE_OVERRIDE=/root/.ssh/confighome
 130
 131 # emacs has a different default search path than the info command. This
 132 # adds the info defaults to emacs, but not the reverse, because I dun
 133 # care much about the cli. The search path is only on the cli if you run
 134 # "info xxx", or in emacs if you run '(info xxx)', so not that
 135 # important, but might as well fix it.
 136
 137 # info info says this path is what was compiled, and its not documented
 138 # anywhere. Through source grepping, i found it in filesys.h of the info
 139 # source in trisquel flidas.
 140 #
 141 # Traling : means for emacs to add its own stuff on to the end.
 142
 143 export INFOPATH=$PATH:/usr/local/info:/usr/info:/usr/local/lib/info:/usr/lib/info:/usr/local/gnu/info:/usr/local/gnu/lib/info:/usr/gnu/info:/usr/gnu/lib/info:/opt/gnu/info:/usr/share/info:/usr/share/lib/info:/usr/local/share/info:/usr/local/share/lib/info:/usr/gnu/lib/emacs/info:/usr/local/gnu/lib/emacs/info:/usr/local/lib/emacs/info:/usr/local/emacs/info:.:
 144
 145 # for openwrt system that has no stty, this is easier than
 146 # guarding every time i use it.
 147 if ! type -p stty >/dev/null; then
 148   stty() { :; }
 149 fi
 150
 151
 152 use_color=false
 153 if [[ $- == *i* ]]; then
 154   # for readline-complete.el
 155   if [[ $LC_INSIDE_EMACS ]]; then
 156     # all for readline-complete.el
 157     stty echo
 158     bind 'set horizontal-scroll-mode on'
 159     bind 'set print-completions-horizontally on'
 160     bind '"\C-i": self-insert'
 161   else
 162
 163
 164     if [[ $TERM != dumb ]] && test -t 1; then
 165       use_color=true
 166     fi
 167
 168     if [[ $KONSOLE_PROFILE_NAME ]]; then
 169       TERM=xterm-256color
 170     fi
 171
 172     if [[ $TERM == alacritty && ! -e /usr/share/terminfo/a/alacritty ]]; then
 173       # todo: we should try installing the alacritty terminfo if it is not found
 174       # https://github.com/alacritty/alacritty/issues/2838
 175       TERM=xterm-256color
 176     fi
 177
 178     # copying from the alacritty example above,
 179     if [[ $TERM == xterm-kitty ]]; then
 180       if [[ ! -e /usr/share/terminfo/x/xterm-kitty ]]; then
 181         TERM=xterm-256color
 182       else
 183         if [[ -e /a/opt/kitty/shell-integration/bash/kitty.bash ]]; then
 184           KITTY_SHELL_INTEGRATION=t
 185           source /a/opt/kitty/shell-integration/bash/kitty.bash
 186         fi
 187       fi
 188     fi
 189
 190     # todo: not sure this works in sakura
 191     #stty werase undef
 192     #bind "\C-w": kill-region
 193     # sakura == xterm-256color
 194     # konsole == xterm
 195     if [[ $TERM != xterm-kitty && $TERM == xterm* ]]; then
 196       # control + arrow keys. for other terminals, see http://unix.stackexchange.com/questions/10806/how-to-change-previous-next-word-shortcut-in-bash
 197       bind '"\e[1;5C": shell-forward-word' 2>/dev/null
 198       bind '"\e[1;5D": shell-backward-word' 2>/dev/null
 199     else
 200       # make ctrl-backspace work. for konsole, i fixed it through
 201       # /home/iank/.local/share/konsole/default.keytab
 202       stty werase ^h
 203       bind '"\eOc": shell-forward-word'
 204       bind '"\eOd": shell-backward-word'
 205     fi
 206     # i cant remember why i did this, probably to free up some keys to bind
 207     # to other things in bash.
 208     # other than C-c and C-z, the rest defined by stty -a are, at least in
 209     # gnome-terminal, overridden by bash, or disabled by the system
 210     stty  lnext undef stop undef start undef
 211   fi
 212
 213 fi
 214
 215 case $TERM in
 216   # fixup broken backspace in chroots
 217   xterm-kitty|alacritty)
 218     chroot() {
 219       TERM=xterm-256color command chroot "$@"
 220     }
 221     ;;
 222 esac
 223
 224 export BC_LINE_LENGTH=0
 225
 226 # ansible option
 227 export PROFILE_TASKS_TASK_OUTPUT_LIMIT=100
 228
 229 # note, if I use a machine I dont want files readable by all users, set
 230 # umask 077  # If fewer than 4 digits are entered, leading zeros are assumed
 231
 232 # i for insensitive. the rest from
 233 # X means dont remove the current screenworth of output upon exit
 234 # R means to show colors n things
 235 # a useful flag is -F aka --quit-if-one-screen
 236 export LESS=RXij12
 237 export SYSTEMD_LESS=$LESS
 238
 239 export NNN_COLORS=2136
 240
 241 export SL_FILES_DIR=/b/ds/sl/.iank
 242 export SL_INFO_DIR=/p/sshinfo
 243
 244
 245
 246 # * include files
 247
 248 if [[ -s $bashrc_dir/path-add-function ]]; then
 249   source $bashrc_dir/path-add-function
 250   if [[ $SSH_CLIENT ]]; then
 251     if grep -qF /home/iank/.iank/e/e /etc/exports &>/dev/null; then
 252       export EMACSDIR=/home/iank/.iank/e/e
 253     fi
 254     path-add $bashrc_dir
 255   fi
 256 fi
 257
 258 # if someone exported $SOE (stop on error), catch errors.
 259 #
 260 # Note, on debian this results in the following warning when in ssh,
 261 # hich I haven't figured out how to fix. It doesn't happen if we source
 262 # after the shell has started
 263 #
 264 # bash: /usr/share/bashdb/bashdb-main.inc: No such file or directory
 265 # bash: warning: cannot start debugger; debugging mode disabled
 266 if [[ $SOE ]]; then
 267   if [[ -e /a/bin/errhandle/err ]]; then
 268     source /a/bin/errhandle/err
 269   fi
 270 fi
 271
 272
 273 mysrc() {
 274   local path dir file
 275   path=$1
 276   dir=${path%/*}
 277   file=${path##*/}
 278   if [[ -s $path ]]; then
 279     # shellcheck disable=SC1090 # this is dynamic, shellcheck can't follow it.
 280     source $path
 281   elif [[ -s $bashrc_dir/$file ]]; then
 282     # shellcheck disable=SC1090 # this is dynamic, shellcheck can't follow it.
 283     source $bashrc_dir/$file
 284   fi
 285 }
 286
 287
 288 mysrc /a/bin/small-misc-bash/ll-function
 289 mysrc /a/bin/distro-functions/src/package-manager-abstractions
 290
 291 # things to remember:
 292 # ALT-C - cd into the selected directory
 293 # CTRL-T - Paste the selected file path into the command line
 294 #
 295 # good guide to some of its basic features is the readme file
 296 # https://github.com/junegunn/fzf
 297
 298 # if [[ -s /usr/share/doc/fzf/examples/key-bindings.bash ]]; then
 299 #   source /usr/share/doc/fzf/examples/key-bindings.bash
 300 # fi
 301
 302 # * functions
 303
 304
 305 # temporary functions
 306 y() {
 307   m "${@//spring/fall}"
 308 }
 309 h() {
 310   e "${@//spring/fall}"
 311 }
 312
 313
 314 ### begin FSF section ###
 315
 316 # Comments before functions are meant to be good useful
 317 # documentation. If they fail at that, please improve them or send Ian a
 318 # note.
 319
 320 ## copy bash completion
 321 #
 322 # It copies how the bash completion works from one command to other
 323 # commands. Generally just use within a .bashrc.
 324 #
 325 # Usage: ORIGINAL_COMMAND TARGET_COMMAND...
 326 #
 327 ccomp() {
 328   local c src
 329   src=$1
 330   shift
 331   if ! c=$(complete -p $src 2>/dev/null); then
 332     _completion_loader $src &>/dev/null ||:
 333     c=$(complete -p $src 2>/dev/null) || return 0
 334   fi
 335   # remove $src( .*|$)
 336   c=${c% "$src"}
 337   c=${c%% "$src" *}
 338   eval $c $*
 339 }
 340
 341 ## BEGIN functions to change directory better than cd ##
 342 #
 343 # The functions:
 344 #
 345 # c: acts like cd, but stores directory history: you could alias to cd if you wanted.
 346 # b: go back
 347 # f: go forward, cl to list recent directories and choose one.
 348 #
 349 # Finer details you may want to skip:
 350 #
 351 # We also define bl to print the list of back and forward directories.
 352 #
 353 # We keep 2 stacks, forward and back. Unlike with a web browser, the
 354 # forward stack is not erased when going somewhere new.
 355 #
 356 # Recent directories are stored in ~/.cdirs.
 357 #
 358 declare -a _dir_forward _dir_back
 359 c() {
 360   # normally, the top of _dir_back is our current dir. if it isn't,
 361   # put it on there, except we don't want to do that when we
 362   # just launched a shell
 363   if [[ $OLDPWD ]]; then
 364     if (( ${#_dir_back[@]} == 0 )) || [[ ${_dir_back[-1]} != "$PWD" ]]; then
 365       _dir_back+=("$PWD")
 366     fi
 367   fi
 368   command cd "$@"
 369   if (( ${#_dir_back[@]} == 0 )) || [[ ${_dir_back[-1]} != "$PWD" ]]; then
 370     _dir_back+=("$PWD")
 371   fi
 372   echo "$PWD" >> ~/.cdirs
 373 }
 374 ccomp cd c
 375
 376 # back
 377 b() {
 378   local top_back
 379   if (( ${#_dir_back[@]} == 0 )); then
 380     echo "nothing left to go back to" >&2
 381     return 0
 382   fi
 383   top_back="${_dir_back[-1]}"
 384
 385   if [[ $top_back == "$PWD" ]] && (( ${#_dir_back[@]} == 1 )); then
 386     echo "already on last back entry" >&2
 387     return 0
 388   fi
 389
 390
 391   if [[ $top_back == "$PWD" ]]; then
 392     # add to dirf if not already there
 393     if (( ${#_dir_forward[@]} == 0 )) || [[ ${_dir_forward[-1]} != "$top_back" ]]; then
 394       _dir_forward+=("$top_back")
 395     fi
 396     unset "_dir_back[-1]"
 397     command cd "${_dir_back[-1]}"
 398   else
 399     if (( ${#_dir_forward[@]} == 0 )) || [[ ${_dir_forward[-1]} != "$PWD" ]]; then
 400       _dir_forward+=("$PWD")
 401     fi
 402     command cd "$top_back"
 403   fi
 404
 405   # Interesting feature, not sure I want it.
 406   # give us a peek at what is next in the list
 407   # if (( ${#_dir_back[@]} >= 2 )); then
 408   #   printf "%s\n" "${_dir_back[-2]}"
 409   # fi
 410   #
 411
 412   # c/b/f Implementation notes:
 413   #
 414   # The top of the back is $PWD
 415   # as long as the last directory change was due to c,b,or cl.
 416   #
 417   # Example of stack changes:
 418   #
 419   # a b c (d)
 420   ## back
 421   # a b (c)
 422   # d
 423   #back
 424   #a (b)
 425   #d c
 426   #back
 427   #(a)
 428   #d c b
 429   #forward
 430   #a (b)
 431   #d c
 432   #
 433   # a b c
 434   ## back
 435   # a b
 436   # (c)
 437   ## forward
 438
 439 }
 440 # forward
 441 f() {
 442   local top_forward
 443   if (( ${#_dir_forward[@]} == 0 )); then
 444     echo "no forward dir left" >&2
 445     return 0
 446   fi
 447   top_forward="${_dir_forward[-1]}"
 448   unset "_dir_forward[-1]"
 449   c "$top_forward"
 450
 451   # give us a peek at what is next in the list
 452   # if (( ${#_dir_forward[@]} )); then
 453   #   printf "%s\n" "${_dir_forward[-1]}"
 454   # fi
 455 }
 456 # cd list
 457 cl() {
 458   local i line input start
 459   local -A buttondirs alines
 460   local -a buttons dirs lines
 461   buttons=( {a..z} {2..9} )
 462   if [[ ! -s ~/.cdirs ]]; then
 463     echo nothing in ~/.cdirs
 464     return 0
 465   fi
 466
 467   i=0
 468
 469   mapfile -t lines <~/.cdirs
 470   start=$(( ${#lines[@]} - 1 ))
 471
 472   # we have ~33 buttons as of this writing, so lets
 473   # prune down the history every once in a while.
 474   if (( start > 500 )); then
 475     tac ~/.cdirs | awk '!seen[$0]++' | head -n 200 | tac | sponge ~/.cdirs || [[ $? == 141 ]]
 476   fi
 477
 478   for (( j=start; j >= 0; j-- )); do
 479     line="${lines[$j]}"
 480     if [[ ! $line || ${alines[$line]} || ! -d "$line" || $line == "$PWD" || line == "$HOME"  ]]; then
 481       continue
 482     fi
 483     alines[$line]=t
 484     buttondirs[${buttons[i]}]="$line"
 485     printf "%s %s\n" ${buttons[i]} "$line"
 486     # the LINES bit is for when we have a short terminal, just dont print all
 487     # the directories. alternative would be to do something like less the list.
 488     if (( i == ${#buttons[@]} - 1 )) || { [[ $LINES ]] && (( i == LINES - 3 )); }; then
 489       break
 490     fi
 491     i=$(( i + 1 ))
 492   done
 493
 494   if (( i == 0 )); then
 495     echo "no dirs in ~/.cdirs"
 496     return 0
 497   fi
 498   read -r -N 1 input
 499   if [[ $input != $'\n' ]]; then
 500     c "${buttondirs[$input]}"
 501   fi
 502 }
 503 # list the back and forward directories. i tend to forget this exists
 504 # and use cl instead.
 505 bl() {
 506   local start i j max
 507   max=10
 508   start=$(( ${#_dir_back[@]} - 1 ))
 509
 510   # cleanup possible repeating of pwd
 511   if (( start >= 0 )) && [[ ${_dir_back[$start]} == "$PWD" ]]; then
 512     start=$(( start - 1 ))
 513   fi
 514   j=1
 515   if (( start >= 0 )); then
 516     for (( i=start; i >= 0 ; i-- )); do
 517       printf "%s %s\n" $j ${_dir_back[i]}
 518       j=$(( j + 1 ))
 519       if (( j >= max )); then
 520         break
 521       fi
 522     done
 523   fi
 524
 525   max=10
 526   start=$(( ${#_dir_forward[@]} - 1 ))
 527
 528   # cleanup possible repeating of pwd
 529   if (( start >= 0 )) && [[ ${_dir_forward[$start]} == "$PWD" ]]; then
 530     start=$(( start - 1 ))
 531   fi
 532   if (( start < 0 )); then
 533     return 0
 534   fi
 535   echo --
 536   j=1
 537   for (( i=start; i >= 0 ; i-- )); do
 538     printf "%s %s\n" $j ${_dir_forward[i]}
 539     j=$(( j + 1 ))
 540     if (( j >= max )); then
 541       break
 542     fi
 543   done
 544 }
 545 ## BEGIN functions to change directory better than cd ##
 546
 547 # pee do. run args as a command with output copied to syslog.
 548 #
 549 # Usage: pd [-t TAG] COMMAND...
 550 #
 551 # -t TAG Override the tag in the syslog. The default is COMMAND with
 552 #        any path part is removed, eg. for /bin/cat the tag is cat.
 553 #
 554 # You can view the log via "journalctl -t TAG"
 555 pd() {
 556   local tag ret
 557   ret=0
 558   tag=${1##*/}
 559   case $1 in
 560     -t) tag="$2"; shift 2 ;;
 561   esac
 562   echo "PWD=$PWD command: $*" | logger -t $tag
 563   "$@" |& pee cat "logger -t $tag" || ret=$?
 564   echo "exited with status=$ret" | pee cat "logger -t $tag"
 565   # this avoids any err-catch
 566   (( ret == 0 )) || return $ret
 567 }
 568 ccomp time pd
 569
 570 # jdo = journal do. Run command as transient systemd service, tailing
 571 # its output in the journal until it completes.
 572 #
 573 # Usage: jdo COMMAND...
 574 #
 575 # Compared to pd: commands recognize this is a non-interactive shell.
 576 # The service is unaffected if our ssh connection dies, no need to run
 577 # in screen or tmux.
 578 #
 579 # Note: The last few lines of any existing entries for a unit by that
 580 # name will be output first, and there will be a few second delay at the
 581 # start of the command, and a second or so at the end.
 582 #
 583 # Note: Functions and aliases obviously won't work, we resolve the
 584 # command to a file.
 585 #
 586 # Note: requires running as root.
 587 jdo() {
 588   local cmd cmd_name jr_pid ret
 589   ret=0
 590   cmd="$1"
 591   shift
 592   if [[ $EUID != 0 ]]; then
 593     echo "jdo: error: rerun as root"
 594     return 1
 595   fi
 596   cmd_name=${cmd##*/}
 597   if [[ $cmd != /* ]]; then
 598     cmd=$(type -P "$cmd")
 599   fi
 600   # -q = quiet
 601   journalctl -qn2 -f -u "$cmd_name" &
 602   # Trial and error of time needed to avoid missing initial lines.
 603   # .5 was not reliable. 1 was not reliable. 2 was not reliable
 604   sleep 4
 605   jr_pid=$!
 606   systemd-run --unit "$cmd_name" --wait --collect "$cmd" "$@" || ret=$?
 607   # The sleep lets the journal output its last line
 608   # before the prompt comes up.
 609   sleep .5
 610   kill $jr_pid &>/dev/null ||:
 611   unset jr_pid
 612   fg &>/dev/null ||:
 613   # this avoids any err-catch
 614   (( ret == 0 )) || return $ret
 615 }
 616 ccomp time jdo
 617 #### end fsf section
 618
 619
 620 ..() { c ..; }
 621 ...() { c ../..; }
 622 ....() { c ../../..; }
 623 .....() { c ../../../..; }
 624 ......() { c ../../../../..; }
 625
 626 chere() {
 627   local f path
 628   for f; do
 629     path=$(readlink -e "$f")
 630     echo "cat >$path <<'EOF'"
 631     cat "$f"
 632     echo EOF
 633   done
 634 }
 635
 636
 637 # file cut copy and paste, like the text buffers :)
 638 # I havnt tested these.
 639 _fbufferinit() { # internal use
 640   ! [[ $my_f_tempdir ]] && my_f_tempdir="$(mktemp -d)"
 641   rm -rf "${my_f_tempdir:?}"/*
 642 }
 643 fcp() { # file cp
 644   _fbufferinit
 645   cp "$@" "$my_f_tempdir"/
 646 }
 647 fct() { # file cut
 648   _fbufferinit
 649   mv "$@" "$my_f_tempdir"/
 650 }
 651 fpst() { # file paste
 652   [[ $2 ]] && { echo too many arguments; return 1; }
 653   target=${1:-.}
 654   cp "$my_f_tempdir"/* "$target"
 655 }
 656
 657 _khfix_common() {
 658   local host ip port file key
 659   read -r host ip port < <(timeout -s 9 2 ssh -oBatchMode=yes -oControlMaster=no -oControlPath=/ -v $1 |& sed -rn "s/debug1: Connecting to ([^ ]+) \[([^\]*)] port ([0-9]+).*/\1 \2 \3/p" ||: )
 660   file=$(readlink -f ~/.ssh/known_hosts)
 661   if [[ ! $ip ]]; then
 662     echo "khfix: ssh failed"
 663     return 1
 664   fi
 665   if [[ $port != 22 ]]; then
 666     ip_entry="[$ip]:$port"
 667     host_entry="[$host]:$port"
 668   else
 669     ip_entry=$ip
 670     host_entry=$host
 671   fi
 672   if [[ $host != "$ip" ]]; then
 673     key=$(ssh-keygen -F "$host_entry" -f $file | sed -r 's/^.*([^ ]+ +[^ ]+) *$/\1/')
 674     if [[ $key ]]; then
 675       grep -Fv "$key" "$file" | sponge "$file"
 676     fi
 677   fi
 678   key=$(ssh-keygen -F "$ip_entry" -f $file | sed -r 's/^.*([^ ]+ +[^ ]+) *$/\1/')
 679   if [[ $key ]]; then
 680     grep -Fv "$key" "$file" | sponge "$file"
 681   fi
 682   ll ~/.ssh/known_hosts
 683   rootsshsync
 684 }
 685 khfix() { # known hosts fix
 686   _khfix_common "$@" || return 1
 687   ssh $1 :
 688 }
 689 khcopy() {
 690   _khfix_common "$@"
 691   ssh-copy-id $1
 692 }
 693
 694 # ya, hacky hardcoded hostnames in 2023. we could do better
 695 hssh-update() {
 696   local -a failed_hosts hosts
 697   case $HOSTNAME in
 698     sy|kd)
 699       hosts=(
 700         kd x3.office.fsf.org syw
 701       )
 702       ;;
 703     x3)
 704       hosts=(
 705         b8.nz sywg.b8.nz
 706       )
 707       ;;
 708   esac
 709   for host in ${hosts[@]}; do
 710     e $host
 711     if ! scp /b/fai/fai/config/files/usr/local/bin/hssh/IANK root@$host:/usr/local/bin/hssh; then
 712       failed_hosts+=($host)
 713     fi
 714   done
 715   if (( ${#failed_hosts[@]} >= 1 )); then
 716     echo failed_hosts=${failed_hosts[*]}
 717     return 1
 718   fi
 719 }
 720
 721 a() {
 722   local x
 723   x=$(readlink -nf "${1:-$PWD}")
 724   # yes, its kinda dumb that xclip/xsel cant do this in one invocation
 725   echo -n "$x" | xclip -selection clipboard
 726   echo -n "$x" | xclip
 727 }
 728
 729 # a1 = awk {print $1}
 730 for field in {1..20}; do
 731   eval a$field"() { awk '{print \$$field}'; }"
 732 done
 733 # h1 = head -n1
 734 for num in {1..9}; do
 735   eval h$num"() { head -n$num || [[ \$? == 141 ]]; }"
 736 done
 737
 738
 739 hexipv4() {
 740   # shellcheck disable=SC2046 disable=SC2001 disable=SC2183 # hacks, expected
 741   printf '%d.%d.%d.%d\n' $(echo $1 | sed 's/../0x& /g')
 742 }
 743
 744 vp9() {
 745   local f out outdir in fname origdir skip1
 746   origdir="$PWD"
 747   outdir=vp9
 748   skip1=false
 749   while [[ $1 == -* ]]; do
 750     case $1 in
 751       # if we got interrupted after 1st phase
 752       -2)
 753         skip1=true
 754         shift
 755         ;;
 756       --out)
 757         outdir=$2
 758         shift 2
 759         ;;
 760     esac
 761   done
 762   m mkdir -p $outdir
 763   # first pass only uses about 1 cpu, so run in parallel
 764   for f; do
 765     {
 766       fname="${f##*/f}"
 767       if [[ $f == /* ]]; then
 768         in="$f"
 769       else
 770         in=$origdir/$f
 771       fi
 772       out="$origdir/$outdir/$fname"
 773       mkdir -p /tmp/vp9/$fname
 774       cd /tmp/vp9/$fname
 775       if ! $skip1 && [[ ! -s ffmpeg2pass-0.log ]]; then
 776         # -nostdin or else wait causes ffmpeg to go into stopped state. dunno why, random stackoverflow answer.
 777         m ffmpeg -nostdin -hide_banner -loglevel error -i $in -g 192 -vcodec libvpx-vp9 -vf scale=-1:720 -max_muxing_queue_size 9999  -b:v 750K -pass 1 -an -f null /dev/null
 778       fi
 779       if [[ -e $out ]]; then rm -f $out; fi
 780       m ffmpeg -nostdin -hide_banner -loglevel error -y -i $in -g 192 -vcodec libvpx-vp9 -tile-rows 2 -vf scale=-1:720 -max_muxing_queue_size 9999 -b:v 750K -pass 2 -c:a libvorbis -qscale:a 5 $out
 781     } &
 782   done
 783   wait -f
 784   cd "$origdir"
 785 }
 786
 787 utcl() { # utc 24 hour time to local hour 24 hour time
 788   echo "print( ($1  $(date +%z | sed -r 's/..$//;s/^(-?)0*/\1/')) % 24)"|python3
 789 }
 790
 791 bwm() {
 792   s bwm-ng -T avg -d
 793 }
 794
 795
 796 # for running in a fai rescue. iank specific.
 797 kdrescue() {
 798   d=vgata-Samsung_SSD_850_EVO_2TB_S2RLNX0J502123D
 799   for f in $d vgata-Samsung_SSD_870_QVO_8TB_S5VUNG0N900656V; do
 800     cryptsetup luksOpen --key-file /p /dev/$f/root crypt-$f-root
 801     cryptsetup luksOpen --key-file /p /dev/$f/o crypt-$f-o
 802   done
 803   mount -o subvol=root_trisquelaramo /dev/mapper/crypt-$d-root /mnt
 804   mount -o subvol=a /dev/mapper/crypt-$d-root /mnt/a
 805   mount -o subvol=o /dev/mapper/crypt-$d-o /mnt/o
 806   mount -o subvol=boot_trisquelaramo /dev/sda2 /mnt/boot
 807   cd /mnt
 808   chrbind
 809 }
 810
 811
 812
 813
 814 c4() { c /var/log/exim4; }
 815
 816 caa() { git commit --amend --no-edit -a; }
 817
 818 cf() {
 819   for f; do
 820     hr
 821     echo "$f"
 822     hr
 823     cat "$f"
 824   done
 825 }
 826 caf() {
 827   # shellcheck disable=SC2033
 828   find -L "$@" -type f -not \( -name .svn -prune -o -name .git -prune \
 829        -o -name .hg -prune -o -name .editor-backups -prune \
 830        -o -name .undo-tree-history -prune \) \
 831        -exec bash -c '. ~/.bashrc; hr; echo "$1"; hr; cat "$1"' _ {} \; 2>/dev/null
 832
 833 }
 834 ccomp cat cf caf
 835
 836 calc() { echo "scale=3; $*" | bc -l; }
 837 # no having to type quotes, but also no command history:
 838 clc() {
 839   local x
 840   read -r x
 841   echo "scale=3; $x" | bc -l
 842 }
 843
 844 cam() {
 845   git commit -am "$*"
 846 }
 847
 848 ccat () { # config cat. see a config without extra lines.
 849   sed -r '/^[[:space:]]*([;#]|--|\/\/|$)/d' "$@"
 850 }
 851 ccomp grep ccat
 852
 853 chrbind() {
 854   local d
 855   # dev/pts needed for pacman signature check
 856   for d in dev proc sys dev/pts; do
 857     [[ -d $d ]]
 858     if ! mountpoint $d &>/dev/null; then
 859       m s mount -o bind /$d $d
 860     fi
 861   done
 862 }
 863 chumount() {
 864   local d
 865   # dev/pts needed for pacman signature check
 866   for d in dev/pts dev proc sys; do
 867     [[ -d $d ]]
 868     if mountpoint $d &>/dev/null; then
 869       m s umount $d
 870     fi
 871   done
 872 }
 873
 874
 875 _cdiff-prep() {
 876   # join options which are continued to multiples lines onto one line
 877   local first=true
 878   while IFS= read -r line; do
 879     # remove leading spaces/tabs. assumes extglob
 880     if [[ $line == "[   ]*" ]]; then
 881       line="${line##+( )}"
 882     fi
 883     if $first; then
 884       pastline="$line"
 885       first=false
 886     elif [[ $line == *=* ]]; then
 887       echo "$pastline" >> "$2"
 888       pastline="$line"
 889     else
 890       pastline="$pastline $line"
 891     fi
 892   done < <(grep -vE '^([ \t]*#|^[ \t]*$)' "$1")
 893   echo "$pastline" >> "$2"
 894 }
 895
 896 cdiff() {
 897   # diff config files,
 898   # setup for format of postfix, eg:
 899   # option = stuff[,]
 900   #    [more stuff]
 901   local pastline unified f1 f2
 902   unified="$(mktemp)"
 903   f1="$(mktemp)"
 904   f2="$(mktemp)"
 905   _cdiff-prep "$1" "$f1"
 906   _cdiff-prep "$2" "$f2"
 907   cat "$f1" "$f2" |  grep -Po '^[^=]+=' | sort | uniq > "$unified"
 908   while IFS= read -r line; do
 909     # the default bright red / blue doesnt work in emacs shell
 910     dwdiff -cblue,red -A best -d "      ," <(grep "^$line" "$f1" || echo ) <(grep "^$line" "$f2" || echo ) | colordiff
 911   done < "$unified"
 912 }
 913
 914
 915 cat-new-files() {
 916   local start=$SECONDS
 917   local dir="$1"
 918   # shellcheck disable=SC2030
 919   inotifywait -m "$dir" -e create -e moved_to | \
 920     while read -r filedir _ file; do
 921       cat "$filedir$file"
 922       hr
 923       calc $((SECONDS - start)) / 60
 924       sleep 5
 925     done
 926
 927 }
 928
 929 chownme() {
 930   s chown -R $USER:$USER "$@"
 931 }
 932
 933 # shellcheck disable=SC2032
 934 chown() {
 935   # makes it so chown -R symlink affects the symlink and its target.
 936   if [[ $1 == -R ]]; then
 937     shift
 938     command chown -h "$@"
 939     command chown -R "$@"
 940   else
 941     command chown "$@"
 942   fi
 943 }
 944
 945 cim() {
 946   git commit -m "$*"
 947 }
 948
 949
 950 d() { builtin bg "$@"; }
 951 ccomp bg d
 952
 953 # f would be more natural, but i already am using it for something
 954 z() { builtin fg "$@"; }
 955 ccomp fg z
 956
 957 x() { builtin kill %%; }
 958
 959 dc() {
 960   diff --strip-trailing-cr -w "$@"   # diff content
 961 }
 962 ccomp diff dc
 963
 964 despace() {
 965   local x y
 966   for x in "$@"; do
 967     y="${x// /_}"
 968     safe_rename "$x" "$y"
 969   done
 970 }
 971
 972 # df progress
 973 # usage: dfp MOUNTPOINT [SECOND_INTERVAL]
 974 # SECOND_INTERVAL defaults to 90
 975 dfp() {
 976   # mp = mountpoint
 977   local a b mp interval
 978   mp=$1
 979   interval=${2:-90}
 980   if [[ ! $mp ]]; then
 981     echo "dfp: error, missing 1st arg" >&2
 982     return 1
 983   fi
 984   while true; do
 985     a=$(df --output=used $mp | tail -n1)
 986     sleep $interval
 987     b=$(df --output=used $mp | tail -n1)
 988     printf "used mib: %'d  mib/min: %s\n" $(( b /1000 )) $(( (b-a) / (interval * 1000 / 60 ) ))
 989   done
 990 }
 991
 992 # get ipv4 ip from HOST. or if it is already a number, return that
 993 hostip() {
 994   local host="$1"
 995   case $host in
 996     [0-9:])
 997       echo "$host"
 998       ;;
 999     *)
1000       getent ahostsv4 "$host" | awk '{ print $1 }' | head -n1
1001       ;;
1002   esac
1003 }
1004
1005 dig() {
1006   command dig +nostats +nocmd "$@"
1007 }
1008 # Output with sections sorted, and removal of query id, so 2 dig outputs can be diffed.
1009 digsort() {
1010   local sec
1011   sec=
1012   dig +nordflag "$@" | sed -r 's/^(;; ->>HEADER<<-.*), id: .*/\1/' | while read -r l; do
1013     if [[ $l == [^\;]* ]]; then
1014       sec+="$l"$'\n'
1015     else
1016       if [[ $sec ]]; then
1017         printf "%s" "$sec" | sort
1018         sec=
1019       fi
1020       printf "%s\n" "$l"
1021     fi
1022   done
1023 }
1024 ccomp dig digsort
1025 # compare digs to the 2 servers
1026 # usage: digdiff @server1 @server2 DIG_ARGS
1027 # note: only the soa master nameserver will respond with
1028 # ra "recursive answer" flag. That difference is meaningless afaik.
1029 digdiff() {
1030   local s1 s2
1031   s1=$1
1032   shift
1033   s2=$1
1034   shift
1035   digsort $s1 "$@" | tee /tmp/digdiff
1036   diff -u /tmp/digdiff <(digsort $s2 "$@")
1037 }
1038
1039 # date in a format i like reading
1040 dt() {
1041   date "+%A, %B %d, %r" "$@"
1042 }
1043 dtr() {
1044   date -R "$@"
1045 }
1046 # date with all digits in a format i like
1047 dtd() {
1048   date +%F_%T% "$@"
1049 }
1050 ccomp date dt dtr dtd
1051
1052 dus() { # du, sorted, default arg of
1053   du -sh ${@:-*} | sort -h
1054 }
1055 ccomp du dus
1056
1057
1058 e() { printf "%s\n" "$*"; }
1059
1060 # echo args
1061 ea() {
1062   if (( ! $# )); then
1063     echo no args
1064   fi
1065   for arg; do
1066     printf "%qEOL\n" "${arg}"
1067     printf "%s" "${arg}" |& hexdump -C
1068   done
1069 }
1070
1071 # echo variables. print var including escapes, etc, like xxd for variable
1072 ev() {
1073   if (( ! $# )); then
1074     echo no args
1075   fi
1076   for arg; do
1077     if [[ -v $arg ]]; then
1078       printf "%qEOL\n" "${!arg}"
1079       printf "%s" "${!arg}" |& hexdump -C
1080     else
1081       echo arg $arg is unset
1082     fi
1083   done
1084 }
1085
1086 ediff() {
1087   [[ ${#@} == 2 ]] || { echo "error: ediff requires 2 arguments"; return 1; }
1088   emacs --eval "(ediff-files \"$1\" \"$2\")"
1089 }
1090
1091 # mail related
1092 # shellcheck disable=SC2120 # we expect to pass arguments in use outside this file
1093 etail() {
1094   ngset
1095   tail -F /var/log/exim4/mainlog /var/log/exim4/*main /var/log/exim4/paniclog /var/log/exim4/*panic -n 200 "$@"
1096   ngreset
1097 }
1098 etailm() {
1099   tail -F /var/log/exim4/mainlog -n 200 "$@"
1100 }
1101 etail2() {
1102   tail -F /var/log/exim4/mymain -n 200 "$@"
1103 }
1104 ccomp tail etail etail2
1105
1106 # ran into this online, trying it out
1107 detach() {
1108   ( "$@" &>/dev/null & disown )
1109 }
1110
1111 showkeys() {
1112   ssh "$@" cat .ssh/authorized_keys{,2}
1113 }
1114
1115
1116 # print exim old pids
1117 eoldpids() {
1118   local configtime pid piduptime now daemonpid
1119   printf -v now '%(%s)T' -1
1120   configtime=$(stat -c%Y /var/lib/exim4/config.autogenerated)
1121   if [[ -s /run/exim4/exim.pid ]]; then
1122     daemonpid=$(cat /run/exim4/exim.pid)
1123   fi
1124   for pid in $(pgrep -f '^/usr/sbin/exim4( |$)'); do
1125     # the daemonpid gets reexeced on HUP (service reloads), keeping its same old timestamp
1126     if [[ $pid == "$daemonpid" ]]; then
1127       continue
1128     fi
1129     piduptime=$(awk -v ticks="$(getconf CLK_TCK)" 'NR==1 { now=$1; next } END { printf "%9.0f\n", now - ($20/ticks) }' /proc/uptime RS=')' /proc/$pid/stat) ||: # sometimes pids disappear pretty fast
1130     if (( configtime > now - piduptime )); then
1131       echo $pid
1132     fi
1133   done
1134 }
1135
1136 # exim tail but only watch lines from new pids
1137 etailnew() {
1138   local pid oldpids
1139   for pid in $(eoldpids); do
1140     oldpids+="$pid|"
1141   done
1142   if [[ $oldpids ]]; then
1143     etail | awk '$3 !~ /^\[('"${oldpids%|}"')\]$/'
1144   else
1145     etail
1146   fi
1147 }
1148 # exim watch as old pids go away
1149 ewatchold() {
1150   local configtime pid piduptime now tmpstr
1151   local -i count
1152   local -a oldpids
1153   count=0
1154   while true; do
1155     tmpstr=$(eoldpids)
1156     mapfile -t oldpids <<<"$tmpstr"
1157     if (( ! ${#oldpids[@]} )); then
1158       return
1159     fi
1160     # print the date every 20 iterations
1161     if (( ! count % 20 )); then
1162       date
1163     fi
1164     count+=1
1165     ps -f -p "${oldpids[*]}"
1166     sleep 1
1167   done
1168 }
1169
1170 eless() {
1171   less /var/log/exim4/mainlog
1172 }
1173 ccomp less eless
1174 eqcat() {
1175   exiqgrep -ir.\* -o 60 | while read -r i; do
1176     hlm exim -Mvc $i
1177     echo
1178     hlm exigrep $i /var/log/exim4/mainlog | cat ||:
1179   done
1180 }
1181 eqrmf() {
1182   # other ways to get the list of message ids:
1183   # exim -bp | awk 'NF == 4 {print $3}'
1184   # # this is slower 160ms, vs 60.
1185   # exipick -i
1186   exiqgrep -ir.\* | xargs exim -Mrm
1187 }
1188
1189 econfdevnew() {
1190   rm -rf /tmp/edev
1191   mkdir -p /tmp/edev/etc
1192   cp -ra /etc/exim4 /tmp/edev/etc
1193   cp -ra /etc/alias* /tmp/edev/etc
1194   find /tmp/edev/etc/exim4 -type f -execdir sed -i "s,/etc/,/tmp/edev/etc/,g" '{}' +
1195   econfdev
1196 }
1197 econfdev() {
1198   update-exim4.conf -d /tmp/edev/etc/exim4 -o /tmp/edev/e.conf
1199 }
1200
1201 # exim grep in
1202 # show important information about incoming mail in the exim log
1203 egrin() {
1204   sed -rn '/testignore|jtuttle|eximbackup/!s/^[^ ]+ ([^ ]+) [^ ]+ [^ ]+ <= ([^ ]+).*T="(.*)" from (<[^ ]+> .*$)/\1 \4\n \3/p' <${1:-/var/log/exim4/mainlog}
1205 }
1206
1207 # 2nd line is message-id:
1208 egrinid() {
1209   sed -rn '/testignore|jtuttle|eximbackup/!s/^[^ ]+ ([^ ]+) [^ ]+ [^ ]+ <= ([^ ]+).* id=([^ ]+) T="(.*)" from (<[^ ]+> .*$)/\1 \5\n \3\n \4/p' <${1:-/var/log/exim4/mainlog}
1210 }
1211 etailin() {
1212   tail -F /var/log/exim4/mainlog | sed -rn '/testignore|jtuttle|eximbackup/!s/^[^ ]+ ([^ ]+) [^ ]+ [^ ]+ <= ([^ ]+).*T="(.*)" from (<[^ ]+> .*$)/\1 \4\n \3/p'
1213 }
1214
1215
1216
1217
1218 fa() {
1219   # find array. make an array of file names found by find into $x
1220   # argument: find arguments
1221   # return: find results in an array $x
1222   while read -rd ''; do
1223     x+=("$REPLY");
1224   done < <(find "$@" -print0);
1225 }
1226
1227 faf() { # find all files. use -L to follow symlinks
1228   find "$@" -not \( -name .svn -prune -o -name .git -prune \
1229        -o -name .hg -prune -o -name .editor-backups -prune \
1230        -o -name .undo-tree-history -prune \) -type f 2>/dev/null
1231 }
1232
1233 # usage ffconcat FILES_TO_CONCAT OUTPUT_FILE
1234 ffconcat() {
1235   local tmpf
1236   tmpf=$(mktemp)
1237   printf "file '%s'\n" "$1" >$tmpf
1238   while (( $# > 1 )); do
1239     shift
1240     printf "file '%s'\n" "$1" >>$tmpf
1241   done
1242   # https://trac.ffmpeg.org/wiki/Concatenate
1243   ffmpeg -f concat -safe 0 -i $tmpf -c copy "$1"
1244   rm $tmpf
1245 }
1246 ffremux() {
1247   local tmpf tmpd
1248   if (( $# == 0 )); then
1249     echo ffremux error expected args >&2
1250     return 1
1251   fi
1252   tmpd="$(mktemp -d)"
1253   for f; do
1254     tmpf=$tmpd/"${f##*/}"
1255     ffmpeg -i "$f" -c:v copy -c:a copy $tmpf
1256     cat $tmpf >"$f"
1257   done
1258   rm -r $tmpd
1259 }
1260
1261
1262
1263 # absolute path of file/dir without resolving symlinks.
1264 #
1265 # Most of the time, I want this where I would normally use readlink.
1266 # This is what realpath -s does in most cases, but sometimes it
1267 # actually resolves symlinks, at least when they are in /.
1268 #
1269 # Note, if run on a dir, if the final component is relative, it won't
1270 # resolve that. Use the below fpd for that.
1271 #
1272 # note: we could make a variation of this which
1273 # assigns to a variable name using eval, so that we don't have to do
1274 # x=$(fp somepath), which might save subshell overhead and look nice,
1275 # but I'm not going to bother.
1276 fp() {
1277   local initial_oldpwd initial_pwd dir base
1278   initial_oldpwd="$OLDPWD"
1279   initial_pwd="$PWD"
1280   if [[ $1 == */* ]]; then
1281     dir="${1%/*}"
1282     base="/${1##*/}"
1283     # CDPATH because having it set will cause cd to possibly print output
1284     CDPATH='' cd "$dir"
1285     printf "%s%s\n" "$PWD" "$base"
1286     CDPATH='' cd "$initial_pwd"
1287     OLDPWD="$initial_oldpwd"
1288   else
1289     printf "%s/%s\n" "$PWD" "$1"
1290   fi
1291 }
1292 # full path of directory without resolving symlinks
1293 fpd() {
1294   local initial_oldpwd initial_pwd dir
1295   initial_oldpwd="$OLDPWD"
1296   initial_pwd="$PWD"
1297   dir="$1"
1298   CDPATH='' cd "$dir"
1299   printf "%s%s\n" "$PWD" "$base"
1300   cd "$initial_pwd"
1301   OLDPWD="$initial_oldpwd"
1302 }
1303
1304
1305 # mail related
1306 frozen() {
1307   rm -rf /tmp/frozen
1308   sudo mailq |gr frozen|awk '{print $3}' | while read -r id; do
1309     sudo exim -Mvl $id
1310     echo
1311     sudo exim -Mvh $id
1312     echo
1313     sudo exim -Mvb $id
1314     echo -e '\n\n##############################\n'
1315   done | tee -a /tmp/frozen
1316 }
1317 frozenrm() {
1318   local ids=()
1319   while read -r line; do
1320     printf '%s\n' "$line"
1321     ids+=("$(printf '%s\n' "$line" |gr frozen|awk '{print $3}')")
1322   done < <(s mailq)
1323   echo "sleeping for 2 in case you change your mind"
1324   sleep 2
1325   sudo exim -Mrm "${ids[@]}"
1326 }
1327
1328 funce() {
1329   # like -e for functions. returns on error.
1330   # at the end of the function, disable with:
1331   # trap ERR
1332   trap 'echo "${BASH_COMMAND:+BASH_COMMAND=\"$BASH_COMMAND\" }
1333 ${FUNCNAME:+FUNCNAME=\"$FUNCNAME\" }${LINENO:+LINENO=\"$LINENO\"  }\$?=$?"
1334 trap ERR
1335 return' ERR
1336 }
1337
1338 getdir () {
1339   local help="Usage: getdir [--help] PATH
1340 Output the directory of PATH, or just PATH if it is a directory."
1341   if [[ $1 == --help ]]; then
1342     echo "$help"
1343     return 0
1344   fi
1345   if [[ $# -ne 1 ]]; then
1346     echo "getdir error: expected 1 argument, got $#"
1347     return 1
1348   fi
1349   if [[ -d $1 ]]; then
1350     echo "$1"
1351   else
1352     local dir
1353     dir="$(dirname "$1")"
1354     if [[ -d $dir ]]; then
1355       echo "$dir"
1356     else
1357       echo "getdir error: directory does not exist"
1358       return 1
1359     fi
1360   fi
1361 }
1362
1363 git_empty_branch() { # start an empty git branch. carefull, it deletes untracked files.
1364   [[ $# == 1 ]] || { echo 'need a branch name!'; return 1;}
1365   local root
1366   root=$(gitroot) || return 1 # function to set gitroot
1367   builtin cd "$root"
1368   git symbolic-ref HEAD refs/heads/$1
1369   rm .git/index
1370   git clean -fdx
1371 }
1372
1373 # shellcheck disable=SC2120
1374 gitroot() {
1375   local help="Usage: gitroot [--help]
1376 Print the full path to the root of the current git repo
1377
1378 Handles being within a .git directory, unlike git rev-parse --show-toplevel,
1379 and works in older versions of git which did not have that."
1380   if [[ $1 == --help ]]; then
1381     echo "$help"
1382     return
1383   fi
1384   local p
1385   p=$(git rev-parse --git-dir) || { echo "error: not in a git repo" ; return 1; }
1386   [[ $p != /* ]] && p=$PWD
1387   echo "${p%%/.git}"
1388 }
1389
1390 g() {
1391
1392   # todo: patch emacs so it will look elsewhere. this is kinda sad:
1393   # https://emacs.stackexchange.com/questions/4253/how-to-start-emacs-with-a-custom-user-emacs-directory
1394
1395   local args gdb=false
1396
1397   if [[ $EMACSDIR ]]; then
1398     path-add "$EMACSDIR/lib-src" "$EMACSDIR/src"
1399   fi
1400
1401   if [[ $DISPLAY ]]; then
1402     args=-n
1403   fi
1404
1405   if (( $# == 0 )); then
1406     args+=" -c"
1407   fi
1408   # duplicate -c, but oh well
1409   if ! pgrep -u $EUID emacsclient; then
1410     if (( $# == 0 )) && type -p gdb &>/dev/null; then
1411       gdb=true
1412     else
1413       args+=" -c"
1414     fi
1415   fi
1416   if [[ $EMACSDIR ]]; then
1417     # Alter the path here, otherwise the nfs mount gets triggered on the
1418     # first path lookup when emacs is not being used.
1419     # shellcheck disable=SC2098 disable=SC2097 # false positive
1420     PATH="$EMACSDIR/lib-src:$EMACSDIR/src:$PATH" EHOME=$HOME HOME=$EMACSDIR m emacsclient -a "" $args "$@"
1421   else
1422     if $gdb; then
1423       # due to a bug, we cant debug from the start unless we get a new gdb
1424       # https://sourceware.org/bugzilla/show_bug.cgi?id=24454
1425       # m gdb -ex="set follow-fork-mode child" -ex=r -ex=quit --args emacs --daemon
1426       m emacsclient -a "" $args "$@"
1427       sleep 1
1428       cd "/a/opt/emacs-$(distro-name)$(distro-num)"
1429       s gdb -p "$(pgrep -f 'emacs --daemon')" -ex c
1430       cd -
1431     else
1432       m emacsclient -a "" $args "$@"
1433     fi
1434   fi
1435 }
1436
1437 # force terminal version
1438 gn() {
1439   g -n "$@"
1440 }
1441
1442 gmacs() {
1443   # quit will prompt if the program crashes.
1444   gdb -ex=r -ex=quit --args emacs "$@"; r;
1445 }
1446
1447 gdkill() {
1448   # kill the emacs daemon
1449   pk1 emacs --daemon
1450 }
1451
1452 gr() {
1453   grep -iIP --color=auto "$@" || return $?
1454 }
1455 grr() { # grep recursive
1456   # Don't return 1 on nonmatch because this is meant to be
1457   # interactive, not in a conditional.
1458   if [[ ${#@} == 1 ]]; then
1459     grep --exclude-dir='*.emacs.d' --exclude-dir='*.git' -riIP --color=auto "$@" . || [[ $? == 1 ]]
1460   else
1461     grep --exclude-dir='*.emacs.d' --exclude-dir='*.git' -riIP --color=auto "$@" || [[ $? == 1 ]]
1462   fi
1463 }
1464 ccomp grep gr grr
1465
1466 rg() { grr "$@"; }
1467 ccomp grep rg
1468
1469 # recursive everything. search for files/dirs and lines. rs = easy chars to press
1470 re() {
1471   local query
1472   query="$1"
1473   find "$@" -not \( -name .svn -prune -o -name .git -prune \
1474        -o -name .hg -prune -o -name .editor-backups -prune \
1475        -o -name .undo-tree-history -prune \) 2>/dev/null | grep -iP --color=auto "$query"
1476   grr -m 5 "$@"
1477 }
1478
1479 # horizontal row. used to break up output
1480 hr() {
1481   local blocks
1482   # 180 is long enough.
1483   blocks=██████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████
1484   printf "%s\n" "$(tput setaf 5 2>/dev/null ||:)${blocks:0:${COLUMNS:-180}}$(tput sgr0 2>/dev/null||:)"
1485 }
1486 # highlight
1487 hl() {
1488   local col input_len=0
1489   for arg; do
1490     input_len=$((input_len + 1 + ${#arg}))
1491   done
1492   col=$((60 - input_len))
1493   printf "\e[1;97;41m%s" "$*"
1494   if (( col > 0 )); then
1495     # shellcheck disable=SC2046 # needed to work as intended. a better way would be like hr above.
1496     printf "\e[1;97;41m \e[0m%.0s" $(eval echo "{1..${col}}")
1497   fi
1498   echo
1499 }
1500 hlm() { hl "$*";  "$@"; }
1501
1502 hrcat() { local f; for f; do [[ -f $f ]] || continue; hr; echo "$f"; cat "$f"; done }
1503
1504
1505 # get latest hub and run it
1506 # main command to use:
1507 # hub pull-request --no-edit
1508 # --no-edit means to use the first commit\'s message as the pull request message.
1509 # If that fails, try doing
1510 # hub pull-request --no-edit -b UPSTREAM_OWNER:branch
1511 # where branch is usually master. it does the pr against your current branch.
1512 #
1513 # On first use, you input username/pass and it gets an oath token so you dont have to repeat
1514 # it\'s at ~/.config/hub
1515 hub() {
1516   local up uptar updir p re
1517   # example https://github.com/github/hub/releases/download/v2.14.2/hub-linux-amd64-2.14.2.tgz
1518   up=$(wget -q -O- https://api.github.com/repos/github/hub/releases/latest | jq -r .assets[].browser_download_url | grep linux-amd64)
1519   re='[[:space:]]'
1520   if [[ ! $up || $up =~ $re ]]; then
1521     echo "failed to get good update url. got: $up"
1522   fi
1523   uptar=${up##*/}
1524   updir=${uptar%.tgz}
1525   if [[ ! -e /a/opt/$updir ]]; then
1526     rm -rf /a/opt/hub-linux-amd64*
1527     wget -P /a/opt $up
1528     tar -C /a/opt -zxf /a/opt/$uptar
1529     rm -f /a/opt/$uptar
1530   fi
1531   if ! which hub &>/dev/null; then
1532     sudo /a/opt/$updir/install
1533   fi
1534
1535   # save token across computers
1536   if [[ ! -L ~/.config/hub ]]; then
1537     if [[ -e ~/.config/hub  ]]; then
1538       mv ~/.config/hub /p/c/subdir_files/.config/
1539     fi
1540     if [[ -e /p/c/subdir_files/.config/hub ]]; then
1541       conflink
1542     fi
1543   fi
1544   command hub "$@"
1545 }
1546
1547 i() { git "$@"; }
1548 ccomp git i
1549
1550 # git status:
1551 # cvs -qn update
1552
1553 # git checkout FILE
1554 # cvs update -C FILE
1555
1556 # git pull
1557 # cvs up[date]
1558
1559 # potentially useful command translation
1560 # https://fling.seas.upenn.edu/~giesen/dynamic/wordpress/equivalent-commands-for-git-svn-and-cvs/
1561
1562 # importing cvs repo into git using git-cvs package:
1563 # /f/www $ /usr/lib/git-core/git-cvsimport -C /f/www-git
1564
1565 ic() {
1566   # fast commit all
1567   git commit -am "$*"
1568 }
1569
1570 ipp() {
1571   git pull
1572   git push
1573 }
1574
1575 ifn() {
1576   local glob
1577   glob="$1"
1578   shift
1579   find -L "$@" -not \( -name .svn -prune -o -name .git -prune \
1580        -o -name .hg -prune -o -name .editor-backups -prune \
1581        -o -name .undo-tree-history -prune \) -iname "*$glob*" 2>/dev/null
1582 }
1583
1584 ifh() {
1585   # insensitive find here. args are combined into the search string.
1586   # -L = follow symlinks
1587   find -L . -not \( -name .svn -prune -o -name .git -prune \
1588        -o -name .hg -prune -o -name .editor-backups -prune \
1589        -o -name .undo-tree-history -prune \) -iname "*$**" 2>/dev/null
1590 }
1591
1592 ifd() {
1593   # insensitive find directory
1594   find -L . -type d -not \( -name .svn -prune -o -name .git -prune \
1595        -o -name .hg -prune -o -name .editor-backups -prune \
1596        -o -name .undo-tree-history -prune \) -iname "*$**" 2>/dev/null
1597 }
1598
1599
1600 ipdrop() {
1601   sudo iptables -A INPUT -s $1 -j DROP
1602 }
1603
1604
1605 istext() {
1606   grep -Il "" "$@" &>/dev/null
1607 }
1608
1609 pst() {
1610   pstree -apnA
1611 }
1612
1613 # journalctl with times in the format the --since= and --until= options accept
1614 jrt() { journalctl -e -n100000 -o short-full "$@"; }
1615 jr() { journalctl -e -n100000 "$@" ; }
1616 jrf() { journalctl -n1000 -f "$@" ; }
1617 jru() {
1618   # the invocation id is "assigned each time the unit changes from an inactive
1619   # state into an activating or active state" man systemd.exec
1620   journalctl -e --no-tail -u exim4 _SYSTEMD_INVOCATION_ID="$(systemctl show -p InvocationID --value $1)"
1621 }
1622 ccomp journalctl jr jrf jru
1623
1624
1625
1626 l() {
1627   if [[ $PWD == /[iap] ]]; then
1628     command ls -A --color=auto -I lost+found "$@"
1629   else
1630     command ls -A --color=auto "$@"
1631   fi
1632 }
1633
1634 lcn() { locate -i "*$**"; }
1635
1636 lg() { LC_COLLATE=C.UTF-8 ll --group-directories-first "$@"; }
1637
1638 lt() { ll -tr "$@"; }
1639
1640 lld() { ll -d "$@"; }
1641
1642 ccomp ls l lg lt lld ll
1643
1644 # low recursively
1645 lowr() {
1646   local f dirs i a
1647   local -a all
1648   for dirs in false true; do
1649     for f; do
1650       if [[ -d $f ]]; then
1651         all=("$f"/**)
1652         # reverse the order to rename the nested dirs first.
1653         # note: 0 element is the dir itself
1654         for ((i=${#all[@]}-1; i>=1; i--)); do
1655           a="${all[i]}"
1656           if $dirs && [[ -d $a ]]; then
1657             # e dirs low "$a" # debug
1658             low "$a"
1659           elif ! $dirs && [[ ! -d $a && -e $a ]]; then
1660             # debug
1661             # e not dirs low "$a" # debug
1662             low "$a"
1663           fi
1664         done
1665       fi
1666       # just rename all the top level args on the second pass
1667       if $dirs; then
1668         # e final dirs low "$f" # debug
1669         low "$f"
1670       fi
1671     done
1672   done
1673 }
1674
1675 low() {  # make filenames lowercase, remove bad chars
1676   local arg new dir f
1677   for arg; do
1678     arg="${arg%%+(/)}" # remove trailing slashes. assumes we have extglob on.
1679     dir="${arg%/*}"
1680     if (( ${#dir} == ${#arg} )); then
1681       dir=.
1682     fi
1683     f="${arg##*/}"
1684     new="${f,,}" # downcase
1685     # shellcheck disable=SC2031 # seems like a shellcheck bug
1686     new="${new//[^a-zA-Z0-9._-]/_}" # sub bad chars
1687     new="${new#"${new%%[[:alnum:]]*}"}" # remove leading/trailing non-alnum
1688     new="${new%"${new##*[[:alnum:]]}"}"
1689     # remove bad underscores, like __ and _._
1690     new=$(echo $new | sed -r 's/__+/_/g;s/_+([.-])|([.-])_+/\1/g')
1691     safe_rename "$dir/$f" "$dir/$new" || return 1
1692   done
1693   return 0
1694 }
1695
1696 lower() { # make first letter of filenames lowercase.
1697   local x
1698   for x in "$@"; do
1699     if [[ ${x::1} == [A-Z] ]]; then
1700       y=$(tr '[:upper:]' '[:lower:]' <<<"${x::1}")"${x:1}"
1701       safe_rename "$x" "$y" || return 1
1702     fi
1703   done
1704 }
1705
1706
1707 k() { # history search
1708   grep -iP --binary-files=text "$@" ${HISTFILE:-~/.bash_history}  | tail -n 80 || [[ $? == 1 ]];
1709 }
1710 ks() { # history search with context
1711   # args are an extended regex used by sed
1712   history | sed -nr "h;s/^\s*(\S+\s+){4}//;/$*/{g;p}" | tail -n 80 || [[ $? == 1 ]];
1713 }
1714 ksu() { # history search unique
1715   grep -P --binary-files=text "$@" ${HISTFILE:-~/.bash_history}  | uniq || [[ $? == 1 ]];
1716 }
1717
1718 # todo: id like to do maybe a daily or hourly cronjob to
1719 # check that my history file size is increasing. Ive had it
1720 # inexplicably truncated in the past.
1721 histrm() {
1722   history -n
1723   HISTTIMEFORMAT='' history | awk -v IGNORECASE=1 '{ a=$1; sub(/^ *[^ ]+ */, "") }; /'"$*"'/'
1724   read -r -p "press anything but contrl-c to delete"
1725   for entry in $(HISTTIMEFORMAT='' history | awk -v IGNORECASE=1 '{ a=$1; sub(/^ *[^ ]+ */, "") }; /'"$*"'/ { print a }' | tac); do
1726     history -d $entry
1727   done
1728   history -w
1729 }
1730
1731 # history without the date
1732 histplain() {
1733   history "$@" | cut -d' ' -f 7-
1734 }
1735
1736 ccomp grep k ks ksu histrm
1737
1738
1739 make-targets() {
1740   # show make targets, via http://stackoverflow.com/questions/3063507/list-goals-targets-in-gnu-make
1741   make -qp | awk -F':' '/^[a-zA-Z0-9][^$#\/\t=]*:([^=]|$)/ {split($1,A,/ /);for(i in A)print A[i]}'
1742 }
1743
1744 mkc() {
1745   mkdir "$1"
1746   c "$1"
1747 }
1748 ccomp mkdir mkc
1749
1750 mkct() {
1751   mkc "$(mktemp -d)"
1752 }
1753 # mkdir the last arg, cp the rest into it
1754 mkcp() {
1755   mkdir -p "${@: -1}"
1756   cp "${@:1:$#-1}" "${@: -1}"
1757 }
1758 mkmv() {
1759   mkdir -p "${@: -1}"
1760   mv "${@:1:$#-1}" "${@: -1}"
1761 }
1762
1763 mkt() { # mkdir and touch file
1764   local path="$1"
1765   mkdir -p "$(dirname "$path")"
1766   touch "$path"
1767 }
1768
1769 # shellcheck disable=SC2032
1770 mkdir() { command mkdir -p "$@"; }
1771
1772 nags() {
1773   # https://github.com/HenriWahl/Nagstamon/issues/357
1774   if ! pgrep -f /usr/bin/dunst >/dev/null; then
1775     /usr/bin/dunst &
1776   fi
1777   /usr/bin/nagstamon &
1778 }
1779
1780 # profanity screen
1781 profsrc() {
1782   screen -RD -S profanity
1783 }
1784
1785 # i dont want to wait for konsole to exit...
1786 prof() {
1787   command prof &>/dev/null &
1788 }
1789 # self chat
1790 sc() {
1791   while read -r l; do
1792     printf '\033[1A\033[K'; printf "%s\n" "$l"| ts "%F %T" | tee -a /p/self-chat.log
1793   done
1794 }
1795
1796 nmt() {
1797   # cant use s because sudo -i doesnt work for passwordless sudo command
1798   case $EUID in
1799     0)
1800       sudo nmtui-connect "$@"
1801       ;;
1802     *)
1803       nmtui-connect "$@"
1804       ;;
1805   esac
1806 }
1807
1808
1809 ngset() {
1810   if shopt nullglob >/dev/null; then
1811     ngreset=false
1812   else
1813     shopt -s nullglob
1814     ngreset=true
1815   fi
1816 }
1817 ngreset() {
1818   if $ngreset; then
1819     shopt -u nullglob
1820   fi
1821 }
1822
1823 nopanic() {
1824   # shellcheck disable=SC2024
1825   ngset
1826   for f in /var/log/exim4/paniclog /var/log/exim4/*panic; do
1827     base=${f##*/}
1828     if [[ -s $f ]]; then
1829       echo ================== $f =============
1830       s tee -a /var/log/exim4/$base-archive <$f
1831       s truncate -s0 $f
1832     fi
1833   done
1834   ngreset
1835 }
1836
1837
1838 ping() { command ping -O "$@"; }
1839 p8() { ping "$@" 8.8.8.8; }
1840 p6() { ping6 "$@" 2001:4860:4860::8888; }
1841
1842 pkx() { # package extract
1843   local pkg cached tmp f
1844   c "$(mktemp -d)"
1845   pkg=$1
1846   # shellcheck disable=SC2012
1847   cached=$(ls -t /var/cache/apt/archives/${pkg}_* | tail -n1 2>/dev/null) ||:
1848   if [[ $cached ]]; then
1849     m cp $cached .
1850   else
1851     m aptitude download $pkg || return 1
1852   fi
1853   tmp=(*); f=${tmp[0]} # only 1 expected
1854   m ex $f
1855   m rm -f $f
1856 }
1857
1858 # pgrep and kill
1859 pk1() {
1860   local tmpf
1861   local -a pids
1862   tmpf=$(pgrep -f "$*")
1863   mapfile -t pids <<<"$tmpf"
1864   case ${#pids[@]} in
1865     1)
1866       # shellcheck disable=SC2128
1867       {
1868         ps -F ${pids[0]}
1869         m kill ${pids[0]}
1870       }
1871       ;;
1872     0) echo "no pid found" ;;
1873     *)
1874       ps -F ${pids[@]}
1875       ;;
1876   esac
1877 }
1878
1879 psg () {
1880   local x y help
1881   help="Usage: psg [--help] GREP_ARGS
1882 grep ps and output in a nice format"
1883   if [[ $1 == --help ]]; then
1884     echo "$help"
1885     return
1886   fi
1887   x=$(ps -eF)
1888   # final grep is because some commands tend to have a lot of trailing spaces
1889   y=$(echo "$x" | grep -iP "$@" | grep -o '.*[^ ]') ||:
1890   if [[ $y ]]; then
1891     echo "$x" | head -n 1 || [[ $? == 141 ]]
1892     echo "$y"
1893   fi
1894 }
1895
1896 pubip() { curl -4s https://icanhazip.com; }
1897 pubip6() { curl -6s https://icanhazip.com; }
1898 whatismyip() { pubip; }
1899
1900
1901 q() { # start / launch a program in the backround and redir output to null
1902   "$@" &> /dev/null &
1903 }
1904
1905 # shellcheck disable=SC2120
1906 r() {
1907   if [[ $HISTFILE ]]; then
1908     history -a # save history
1909   fi
1910   trap ERR # this avoids a segfault
1911   exit ${1:0}
1912   # i had this redir, not sure why
1913   #  exit "$@" 2>/dev/null
1914 }
1915
1916 # scp is insecure and deprecated.
1917 scp() {
1918   rsync -Pt --inplace "$@"
1919 }
1920 ccomp rsync scp
1921
1922 randport() {
1923   # available high ports are 1024-65535,
1924   # but lets skip things that are more likely to be in use
1925   python3 <<'EOF'
1926 import secrets
1927 print(secrets.SystemRandom().randrange(10002,65500))
1928 EOF
1929 }
1930
1931 # reapply bashrc
1932 reb() {
1933   # shellcheck disable=SC1090 # expected to not follow
1934   source ~/.bashrc
1935 }
1936
1937 rl() {
1938   readlink -f "$@"
1939 }
1940 ccomp readlink rl
1941
1942 rsd() {
1943   # rsync, root is required to keep permissions right.
1944   # rsync  --archive --human-readable --verbose --itemize-changes --checksum \(-ahvic\) \
1945     #                                   --no-times --delete
1946   # basically, make an exact copy, use checksums instead of file times to be more accurate
1947   rsync -ahvic --delete "$@"
1948 }
1949 rsa() {
1950   # like rlu, but dont delete files on the target end which
1951   # do not exist on the original end.
1952   rsync -ahvic "$@"
1953 }
1954 rst() {
1955   # rl without preserving modification time.
1956   rsync -ahvic --delete --no-t "$@"
1957 }
1958 # [RSYNC_OPTS] HOST PATH
1959 rsu() {
1960   # eg. rsu -opts frodo /testpath
1961   # relative paths will expanded with readlink -f.
1962   opts=("${@:1:$#-2}") #  1 to last -2
1963   path="${*:$#}" # last
1964   host="${*:$#-1:1}" # last -1
1965   if [[ $path == .* ]]; then
1966     path=$(readlink -f $path)
1967   fi
1968   m rsync -ahvi --relative --no-implied-dirs "${opts[@]}" "$path" "root@$host:/";
1969 }
1970 ccomp rsync rsd rsa rst rsu
1971
1972 # find programs listening on a port
1973 ssp() {
1974   local port=$1
1975   # to figure out these args, i had to look at the man page from git version, as of 2022-04.
1976   s ss -lpn state listening sport = $port
1977 }
1978
1979 resolvcat() {
1980   local f
1981   if [[ $(systemctl is-active nscd ||:) != inactive ]]; then
1982     m s nscd -i hosts
1983   fi
1984   f=/etc/resolv.conf
1985   echo $f:;  ccat $f
1986   hr; s ss -lpn sport = 53
1987   if systemctl is-enabled dnsmasq &>/dev/null || [[ $(systemctl is-active dnsmasq ||:) != inactive ]]; then
1988     # this will fail is dnsmasq is failed
1989     hr; m ser status dnsmasq | cat || :
1990     f=/etc/dnsmasq.conf
1991     hr; echo $f:;  ccat $f
1992     hr; m grr '^ *(servers-file|server) *=|^ *no-resolv *$' /etc/dnsmasq.conf /etc/dnsmasq.d
1993     f=/etc/dnsmasq-servers.conf
1994     hr; echo $f:;  ccat $f
1995   fi
1996   hr
1997   echo /etc/nsswitch.conf:
1998   grep '^ *hosts:' /etc/nsswitch.conf
1999   if systemctl is-enabled systemd-resolved &>/dev/null || [[ $(systemctl is-active systemd-resolved ||:) != inactive ]]; then
2000     hr; m ser status systemd-resolved | cat || :
2001     hr; m resolvectl status | cat
2002   fi
2003
2004 }
2005 rcat() {
2006   resolvcat | less
2007 }
2008 reresolv() {
2009   if [[ $(systemctl is-active nscd ||:) != inactive ]]; then
2010     m ser stop nscd
2011     sleep .5
2012     m ser start nscd
2013     m sudo nscd -i hosts
2014   fi
2015   if [[ $(systemctl is-active dnsmasq ||:) != inactive ]]; then
2016     m sudo systemctl restart dnsmasq
2017   fi
2018   if [[ $(systemctl is-active systemd-resolved ||:) != inactive ]]; then
2019     m sudo systemctl restart systemd-resolved
2020   fi
2021   if type -P resolvectl &>/dev/null; then
2022     resolvectl flush-caches
2023   fi
2024 }
2025
2026 # add annoyingly long argument which should be the default
2027 sedi() {
2028   sed -i --follow-symlinks "$@"
2029 }
2030
2031 rmstrips() {
2032   ssh fencepost head -n 300 /gd/gnuorg/EventAndTravelInfo/rms-current-trips.txt | less
2033 }
2034
2035 urun () {
2036   umask $1
2037   shift
2038   "$@"
2039 }
2040 sudo () {
2041   command sudo "$@" || return $?
2042   DID_SUDO=true
2043 }
2044 s() {
2045   # background
2046   # I use a function because otherwise we cant use in a script,
2047   # cant assign to variable.
2048   #
2049   # note: gksudo is recommended for X apps because it does not set the
2050   # home directory to the same, and thus apps writing to ~ fuck things up
2051   # with root owned files.
2052   #
2053   if [[ $EUID != 0 || $1 == -* ]]; then
2054     # shellcheck disable=SC2034
2055     SUDOD="$PWD" command sudo -i "$@"
2056     DID_SUDO=true
2057   else
2058     "$@"
2059   fi
2060 }
2061 sb() { # sudo bash -c
2062   # use sb instead of s is for sudo redirections,
2063   # eg. sb 'echo "ok fine" > /etc/file'
2064   # shellcheck disable=SC2034
2065   local SUDOD="$PWD"
2066   sudo -i bash -c "$@"
2067 }
2068 # secret sudo
2069 se() { s urun 0077 "$@"; }
2070 ccomp sudo s sb se
2071
2072 safe_rename() { # warn and dont rename if file exists.
2073   # mv -n exists, but it\'s silent
2074   if [[ $# != 2 ]]; then
2075     echo safe_rename error: $# args, need 2 >&2
2076     return 1
2077   fi
2078   if [[ $1 != "$2" ]]; then # yes, we want to silently ignore this
2079     if [[ -e $2 || -L $2 ]]; then
2080       echo "Cannot rename $1 to $2 as it already exists."
2081     else
2082       mv -vi "$1" "$2"
2083     fi
2084   fi
2085 }
2086
2087
2088 sd() {
2089   sudo dd status=none of="$1"
2090 }
2091
2092 ser() {
2093   if type -p systemctl &>/dev/null; then
2094     s systemctl "$@"
2095   else
2096     if (( $# >= 3 )); then
2097       echo iank: ser expected 2 or less arguments
2098       return 1
2099     fi
2100     s service $2 $1
2101   fi
2102 }
2103 serstat() {
2104   systemctl -n 40 status "$@"
2105 }
2106
2107 seru() { systemctl --user "$@"; }
2108 # like restart, but do nothing if its not already started
2109 srestart() {
2110   local service=$1
2111   if [[ $(s systemctl --no-pager show -p ActiveState $service ) == ActiveState=active ]]; then
2112     systemctl restart $service
2113   fi
2114 }
2115
2116 setini() { # set a value in a .ini style file
2117   key="$1" value="$2" section="$3" file="$4"
2118   if [[ -s $file ]]; then
2119     sed -ri -f - "$file" <<EOF
2120 # remove existing keys
2121 / *\[$section\]/,/^ *\[[^]]+\]/{/^\s*${key}[[:space:]=]/d}
2122 # add key
2123 /^\s*\[$section\]/a $key=$value
2124 # from section to eof, do nothing
2125 /^\s*\[$section\]/,\$b
2126 # on the last line, if we haven't found section yet, add section and key
2127 \$a [$section]\\
2128 $key=$value
2129 EOF
2130   else
2131     cat >"$file" <<EOF
2132 [$section]
2133 $key=$value
2134 EOF
2135   fi
2136 }
2137
2138 sgo() { # service go
2139   service=$1
2140   ser restart $service || return 1
2141   if type -p systemctl &>/dev/null; then
2142     ser enable $service
2143   fi
2144 }
2145 soff () {
2146   for service; do
2147     # ignore services that dont exist
2148     if systemctl cat $service &>/dev/null; then
2149       ser stop $service;
2150       ser disable $service
2151     fi
2152   done
2153 }
2154
2155 sgu() {
2156   systemctl list-unit-files | rg "$@"
2157 }
2158
2159
2160 sk() {
2161   # disable a warning with:
2162   # shellcheck disable=SC2206 # reasoning
2163
2164   # see bash-template/style-guide.md for justifications
2165
2166   local quotes others
2167   quotes=2048,2068,2086,2206,2254
2168   others=2029,2032,2033,2054,2164,
2169   shellcheck -W 999 -x -e $quotes,$others "$@" || return $?
2170 }
2171 # sk with quotes. For checking scripts that we expect to take untrusted
2172 # input in order to verify we quoted vars.
2173 skq() {
2174   local others
2175   others=2029,2033,2054,2164
2176   shellcheck -W 999 -x -e $others "$@" || return $?
2177 }
2178
2179 skgit() {
2180   local f
2181   for f in $(i s | awk '$1 == "modified:" {print $2}'); do
2182     if [[ $(head -n1 "$f") == '#!/bin/bash'* ]]; then
2183       sk $f ||:
2184     fi
2185   done
2186 }
2187
2188 # sl: ssh, but firsh rsync our bashrc and related files to a special
2189 # directory on the remote host if needed.
2190
2191 # Some environment variables and files need to be setup for this to work
2192 # (mine are set at the beginning of this file)
2193
2194 # SL_FILES_DIR: Environment variable. Path to folder which should at
2195 # least have a .bashrc file or symlink. This dir will be rsynced to ~ on
2196 # remote hosts (top level symlinks are resolved) unless the host already
2197 # has a $SL_FILES_DIR/.bashrc. In that case, we assume it is a host you
2198 # control and sync files to separately and already has the ~/.bashrc you
2199 # want. The remote bash will also take its .inputrc config from this
2200 # folder (default of not existing is fine). Mine looks like this:
2201 # https://iankelling.org/git/?p=distro-setup;a=tree;f=sl/.iank
2202
2203 # SL_INFO_DIR: Environment variable. This folder stores info about what
2204 # we detected on the remote system and when we last synced. It will be created
2205 # if it does not exist. Sometimes you may want to forget about a
2206 # remote system, you can use sl --rsync, or the function for that slr
2207 # below.
2208
2209 # SL_TEST_CMD: Env var. Meant to be used to vary the files synced
2210 # depending on the remote host. Run this string on the remote host the
2211 # first time sl is run (or if we run slr). The result is passed to
2212 # SL_TEST_HOOK. For example,
2213 # export SL_TEST_CMD=". /etc/os-release ; echo \${VERSION//[^a-zA-Z0-9]/}"
2214
2215 # SL_TEST_HOOK: Env var. It is run as $SL_TEST_HOOK. This can set
2216 # $SL_FILES_DIR to vary the files synced.
2217
2218 # SL_RSYNC_ARGS: Env var. String of arguments passed to rsync. For
2219 # example to exclude files within a directory. Note, excluded
2220 # files wont be deleted on rsync, you can add --delete-excluded
2221 # to the rsync command if that is desired.
2222
2223 # SL_SSH_ARGS: Env var. Default arguments passed to ssh.
2224
2225 # For when ~/.bashrc is already customized on the remote server, you
2226 # might find it problematic that ~/.bashrc is sourced for ALL ssh
2227 # commands, even in scripts. This paragraph is all about that. bash
2228 # scripts dont source ~/.bashrc, but call ssh in scripts and you get
2229 # ~/.bashrc. You dont want this. .bashrc is meant for interactive shells
2230 # and if you customize it, probably has bugs from time to time. This is
2231 # bad. Here's how I fix it. I have a special condition to "return" in my
2232 # .bashrc for noninteractive ssh shells (copy that code). Then use this
2233 # function or similar that passes LC_USEBASHRC=t when sshing and I want
2234 # my bashrc. Also, I don't keep most of my bashrc in .bashrc, i source a
2235 # separate file because even if I return early on, the whole file gets
2236 # parsed which can fail if there is a syntax error.
2237 sl() {
2238   # Background on LC_USEBASHRC var (no need to read if you just want to
2239   # use this function): env variables sent across ssh are strictly
2240   # limited, but we get LC_* at least in debian based machines, so we
2241   # just make that * be something no normal program would use. Note, on
2242   # hosts that dont allow LC_* I start an inner shell with LC_USEBASHRC
2243   # set, and the inner shell also allows running a nondefault
2244   # .bashrc. This means the outer shell still ran the default .bashrc,
2245   # but that is the best we can do.
2246
2247   local now args remote dorsync haveinfo tmpa sshinfo tmp tmp2 type info_sec force_rsync \
2248         sync_dirname testcmd extra_info testbool files_sec sl_test_cmd sl_test_hook
2249   declare -a args tmpa
2250
2251   args=($SL_SSH_ARGS)
2252
2253   # ssh [-1246Antivivisectionist] [-b bind_address] [-c cipher_spec] [-D [bind_address:]port]
2254   # [-E log_file] [-e escape_char] [-F configfile] [-I pkcs11] [-i identity_file] [-L address]
2255   # [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port] [-Q query_option]
2256   # [-R address] [-S ctl_path] [-W host:port] [-w local_tun[:remote_tun]] [user@]hostname
2257   # [command]
2258
2259   # ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]
2260   # [-D [bind_address:]port] [-E log_file] [-e escape_char]
2261   # [-F configfile] [-I pkcs11] [-i identity_file]
2262   # [-J [user@]host[:port]] [-L address] [-l login_name] [-m mac_spec]
2263   # [-O ctl_cmd] [-o option] [-p port] [-Q query_option] [-R address]
2264   # [-S ctl_path] [-W host:port] [-w local_tun[:remote_tun]]
2265
2266   force_rsync=false
2267   if [[ $1 == --rsync ]]; then
2268     force_rsync=true
2269     shift
2270   fi
2271   # shellcheck disable=SC2153 # intentional
2272   sl_test_cmd=$SL_TEST_CMD
2273   # shellcheck disable=SC2153 # intentional
2274   sl_test_hook=$SL_TEST_HOOK
2275   # shellcheck disable=SC2153 # intentional
2276   sl_rsync_args=$SL_RSYNC_ARGS
2277   while [[ $1 ]]; do
2278     case "$1" in
2279       --rsync)
2280         force_rsync=true
2281         ;;
2282       --sl-test-cmd)
2283         sl_test_cmd="$2"
2284         shift
2285         ;;
2286       --sl-test-hook)
2287         sl_test_hook="$2"
2288         shift
2289         ;;
2290       --sl-rsync-args)
2291         sl_rsync_args="$2"
2292         shift
2293         ;;
2294       *)
2295         break
2296         ;;
2297     esac
2298     shift
2299   done
2300
2301   while [[ $1 ]]; do
2302     case "$1" in
2303       # note we dont support things like -4oOption
2304       -[46AaCfGgKkMNnqsTtVvXxYy]*)
2305         args+=("$1"); shift
2306         ;;
2307       -[bcDEeFIiJLlmOopQRSWw]*)
2308         # -oOption etc is valid
2309         if (( ${#1} >= 3 )); then
2310           args+=("$1"); shift
2311         else
2312           args+=("$1" "$2"); shift 2
2313         fi
2314         ;;
2315       *)
2316         break
2317         ;;
2318     esac
2319   done
2320   remote="$1"
2321   if [[ ! $remote ]]; then
2322     echo $0: error hostname required >&2
2323     return 1
2324   fi
2325   shift
2326
2327   if [[ ! $SL_INFO_DIR  ]]; then
2328     echo 'error: missing SL_INFO_DIR env var' >&2
2329     return 1
2330   fi
2331
2332   dorsync=false
2333   haveinfo=false
2334   tmpa=($SL_INFO_DIR/???????????"$remote")
2335   sshinfo=${tmpa[0]}
2336   if [[ -e $sshinfo ]]; then
2337     if $force_rsync; then
2338       rm -f $sshinfo
2339     else
2340       haveinfo=true
2341     fi
2342   fi
2343   if $haveinfo; then
2344     tmp=${sshinfo[0]##*/}
2345     tmp2=${tmp::11}
2346     type=${tmp2: -1}
2347     extra_info=$(cat $sshinfo)
2348   else
2349     # we test for string to know ssh succeeded
2350     testbool="test -e $SL_FILES_DIR/.bashrc -a -L .bashrc -a -v LC_USEBASHRC"
2351     testcmd="if $testbool; then printf y; else printf n; fi"
2352     if ! tmp=$(LC_USEBASHRC=y command ssh "${args[@]}" "$remote" "$testcmd; $sl_test_cmd"); then
2353       echo failed sl test. doing plain ssh -v
2354       command ssh -v "${args[@]}" "$remote"
2355     fi
2356     if [[ $tmp == y* ]]; then
2357       type=a
2358     else
2359       dorsync=true
2360       type=b
2361     fi
2362     extra_info="${tmp:1}"
2363   fi
2364   if [[ $sl_test_hook ]]; then
2365     RSYNC_RSH="ssh ${args[*]}" $sl_test_hook "$extra_info" "$remote"
2366   fi
2367
2368   if $haveinfo && [[ $type == b ]]; then
2369     info_sec=${tmp::10}
2370     read -r files_sec _ < <(find -L $SL_FILES_DIR -printf "%T@ %p\n" | sort -nr || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]  )
2371     files_sec=${files_sec%%.*}
2372     if (( files_sec > info_sec )); then
2373       dorsync=true
2374       rm -f $sshinfo
2375     fi
2376   fi
2377
2378   sync_dirname=${SL_FILES_DIR##*/}
2379
2380   if [[ ! $SL_FILES_DIR  ]]; then
2381     echo 'error: missing SL_FILES_DIR env var' >&2
2382     return 1
2383   fi
2384
2385   if $dorsync; then
2386     RSYNC_RSH="ssh ${args[*]}" m rsync -rptL --delete $sl_rsync_args $SL_FILES_DIR "$remote":
2387   fi
2388   if $dorsync || ! $haveinfo; then
2389     sshinfo=$SL_INFO_DIR/$EPOCHSECONDS$type"$remote"
2390     [[ -e $SL_INFO_DIR ]] || mkdir -p $SL_INFO_DIR
2391     printf "%s\n" "$extra_info" >$sshinfo
2392     chmod 666 $sshinfo
2393   fi
2394   if [[ $type == b ]]; then
2395     if (( ${#@} )); then
2396       # Theres a couple ways to pass arguments, im not sure whats best,
2397       # but relying on bash 4.4+ escape quoting seems most reliable.
2398       command ssh "${args[@]}" "$remote" \
2399               LC_USEBASHRC=t bash -c '.\ '$sync_dirname'/.bashrc\;"\"\$@\""' bash ${@@Q}
2400     elif [[ ! -t 0 ]]; then
2401       # This case is when commands are being piped to ssh.
2402       # Normally, no bashrc gets sourced.
2403       # But, since we are doing all this, lets source it because we can.
2404       cat <(echo . $sync_dirname/.bashrc) - | command ssh "${args[@]}" "$remote" LC_USEBASHRC=t bash
2405     else
2406       command ssh -t "${args[@]}" "$remote" LC_USEBASHRC=t INPUTRC=$sync_dirname/.inputrc bash --rcfile $sync_dirname/.bashrc
2407     fi
2408   else
2409     if [[ -t 0 ]]; then
2410       LC_USEBASHRC=t command ssh "${args[@]}" "$remote" ${@@Q}
2411     else
2412       command ssh "${args[@]}" "$remote" LC_USEBASHRC=t bash
2413     fi
2414   fi
2415   # this function inspired from https://github.com/Russell91/sshrc
2416 }
2417
2418 slr() {
2419   sl --rsync "$@"
2420 }
2421 sss() { # ssh solo
2422   sl -oControlMaster=no -oControlPath=/ "$@"
2423 }
2424 # kill off old shared socket then ssh
2425 ssk() {
2426   m ssh -O exit "$@" || [[ $? == 255 ]]
2427   m sl "$@"
2428 }
2429 ccomp ssh sl slr sss ssk
2430 # plain ssh
2431 ssh() {
2432   if [[ $TERM == alacritty || $TERM == xterm-kitty ]]; then
2433     TERM=xterm-256color LC_USEBASHRC=t command ssh "$@"
2434   else
2435     LC_USEBASHRC=t command ssh "$@"
2436   fi
2437 }
2438
2439
2440 slog() {
2441   # log with script. timing is $1.t and script is $1.s
2442   # -l to save to ~/typescripts/
2443   # -t to add a timestamp to the filenames
2444   local logdir do_stamp arg_base
2445   (( $# >= 1 )) || { echo "arguments wrong"; return 1; }
2446   logdir="/a/dt/"
2447   do_stamp=false
2448   while getopts "lt" option
2449   do
2450     case $option in
2451       l) arg_base=$logdir ;;
2452       t) do_stamp=true ;;
2453       *)
2454         echo error: bad option
2455         return 1
2456         ;;
2457     esac
2458   done
2459   shift $((OPTIND - 1))
2460   arg_base+=$1
2461   [[ -e $logdir ]] || mkdir -p $logdir
2462   $do_stamp && arg_base+=$(date +%F.%T%z)
2463   script -t $arg_base.s 2> $arg_base.t
2464 }
2465 splay() { # script replay
2466   #logRoot="$HOME/typescripts/"
2467   #scriptreplay "$logRoot$1.t" "$logRoot$1.s"
2468   scriptreplay "$1.t" "$1.s"
2469 }
2470
2471 sr() {
2472   # sudo redo. be aware, this command may not work right on strange distros or earlier software
2473   if [[ $# == 0 ]]; then
2474     sudo -E bash -c -l "$(history -p '!!')"
2475   else
2476     echo this command redos last history item. no argument is accepted
2477   fi
2478 }
2479
2480 srm () {
2481   # with -ll, less secure but faster.
2482   command srm -ll "$@"
2483 }
2484
2485 srun() {
2486   scp $2 $1:/tmp
2487   ssh $1 "/tmp/${2##*/}" "$(printf "%q\n" "${@:2}")"
2488 }
2489
2490
2491 swap() {
2492   local tmp
2493   tmp=$(mktemp)
2494   mv $1 $tmp
2495   mv $2 $1
2496   mv $tmp $2
2497 }
2498
2499 tclock() { # terminal clock
2500   local x
2501   clear
2502   date +%l:%_M
2503   len=60
2504   # this goes to full width
2505   #len=${1:-$((COLUMNS -7))}
2506   x=1
2507   while true; do
2508     if (( x == len )); then
2509       end=true
2510       d="$(date +%l:%_M)   "
2511     else
2512       end=false
2513       d=$(date +%l:%M:%_S)
2514     fi
2515     echo -en "\r"
2516     echo -n "$d"
2517     for ((i=0; i<x; i++)); do
2518       if (( i % 6 )); then
2519         echo -n _
2520       else
2521         echo -n .
2522       fi
2523     done
2524     if $end; then
2525       echo
2526       x=1
2527     else
2528       x=$((x+1))
2529     fi
2530     sleep 5
2531   done
2532 }
2533
2534
2535 te() {
2536   # test existence / exists
2537   local ret=0
2538   for x in "$@"; do
2539     [[ -e "$x" || -L "$x" ]] || ret=1
2540   done
2541   return $ret
2542 }
2543
2544 psoff() {
2545   # normally, i would just execute these commands in the function.
2546   # however, DEBUG is not inherited, so we need to run it outside a function.
2547   # And we want to run set -x afterwards to avoid spam, so we cram everything
2548   # in here, and then it will run after this function is done.
2549   # # set as array to satisfy shellcheck, but it is equivalent to setting it as non-array
2550   PROMPT_COMMAND=('trap DEBUG; unset PROMPT_COMMAND; PS1="\w \$ "')
2551 }
2552 pson() {
2553   PROMPT_COMMAND=(prompt-command)
2554   if [[ $TERM == *(screen*|xterm*|rxvt*) ]]; then
2555     trap 'settitle "$BASH_COMMAND"' DEBUG
2556   fi
2557 }
2558
2559 # prometheus node curl
2560 pnodecurl() {
2561   local host
2562   host=${1:-127.0.0.1}
2563   s curl --cert-type PEM --cert /etc/prometheus/ssl/prometheus_cert.pem --key /etc/prometheus/ssl/prometheus_key.pem --cacert /etc/prometheus/ssl/prom_node_cert.pem --resolve prom_node:9100:$host -v https://prom_node:9100/metrics
2564 }
2565
2566 tx() { # toggle set -x, and the prompt so it doesnt spam
2567   if [[ $- == *x* ]]; then
2568     set +x
2569     pson
2570   else
2571     psoff
2572   fi
2573 }
2574
2575 psnetns() {
2576   # show all processes in the network namespace $1.
2577   # blank entries appear to be subprocesses/threads
2578   local x netns
2579   netns=$1
2580   ps -w | head -n 1
2581   sudo find -L /proc/[1-9]*/task/*/ns/net -samefile /run/netns/$netns | cut -d/ -f5 | \
2582     while read -r l; do
2583       x=$(ps -w --no-headers -p $l);
2584       if [[ $x ]]; then echo "$x"; else echo $l; fi;
2585     done
2586 }
2587 nonet() {
2588   if ! s ip netns list | grep -Fx nonet &>/dev/null; then
2589     s ip netns add nonet
2590   fi
2591   sudo -E env /sbin/ip netns exec nonet sudo -E -u iank /bin/bash
2592 }
2593
2594 m() { printf "%s\n" "$*";  "$@"; }
2595
2596 # update file. note: duplicated in mail-setup.
2597 # updates $ur u result to true or false
2598 # updates $reload to true if file updated is in /etc/systemd/system
2599 u() {
2600   local tmp tmpdir dest="$1"
2601   local base="${dest##*/}"
2602   local dir="${dest%/*}"
2603   if [[ $dir != "$base" ]]; then
2604     # dest has a directory component
2605     mkdir -p "$dir"
2606   fi
2607   # shellcheck disable=SC2034 # see comment at top of function
2608   ur=false # u result
2609   tmpdir="$(mktemp -d)"
2610   cat >$tmpdir/"$base"
2611   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
2612   if [[ $tmp ]]; then
2613     printf "%s\n" "$tmp"
2614     # shellcheck disable=SC2034 # see comment at top of function
2615     ur=true
2616     if [[ $dest == /etc/systemd/system/* ]]; then
2617       # shellcheck disable=SC2034 # see comment at top of function
2618       reload=true
2619     fi
2620   fi
2621   rm -rf $tmpdir
2622 }
2623
2624
2625 uptime() {
2626   if type -p uprecords &>/dev/null; then
2627     uprecords -B
2628   else
2629     command uptime
2630   fi
2631 }
2632
2633 virshrm() {
2634   for x in "$@"; do virsh destroy "$x"; virsh undefine "$x"; done
2635 }
2636
2637 vm-set-listen(){
2638   local t
2639   t=$(mktemp)
2640   local vm=$1
2641   local ip=$2
2642   sudo virsh dumpxml $vm | sed -r "s/(<listen.*address=')([^']+)/\1$ip/" | \
2643     sed -r "s/listen='[^']+/listen='$ip/"> $t
2644   sudo virsh undefine $vm
2645   sudo virsh define $t
2646 }
2647
2648
2649 vmshare() {
2650   vm-set-listen $1 0.0.0.0
2651 }
2652
2653
2654 vmunshare() {
2655   vm-set-listen $1 127.0.0.1
2656 }
2657
2658 myiwscan() {
2659   # find input, copy to pattern space, when we find the first field, print the copy in different order without newlines.
2660   # instead of using labels, we could just match a line and group, eg: /signal:/,{s/signal:(.*)/\1/h}
2661   sudo iw dev wls1 scan | sed -rn  "
2662 s/^\Wcapability: (.*)/\1/;Ta;h;b
2663 :a;s/^\Wsignal: -([^.]+).*/\1/;Tb;H;b
2664 # padded to min width of 20
2665 :b;s/\WSSID: (.*)/\1                    /;T;s/^(.{20}(.*[^ ])?) */\1/;H;g;s/(.*)\n(.*)\n(.*)/\2 \3  \1/gp;b
2666 "|sort -r
2667 }
2668
2669 # Run script by copying it to a temporary location first,
2670 # and changing directory, so we don't have any open
2671 # directories or files that could cause problems when
2672 # remounting.
2673 zr() {
2674   local tmp
2675   tmp=$(type -p "$1")
2676   if [[ $tmp ]]; then
2677     cd "$(mktemp -d)"
2678     cp -a "$tmp" .
2679     shift
2680     ./"${tmp##*/}" "$@"
2681   else
2682     "$@"
2683   fi
2684 }
2685
2686
2687 # * spark
2688 # spark 1 5 22 13 53
2689 #   # => ▁▁▃▂▇
2690
2691 # The MIT License
2692 # Copyright (c) Zach Holman, https://zachholman.com
2693 # https://github.com/holman/spark
2694
2695 # As of 2022-10-28, I reviewed github forks that had several newer
2696 # commits, none had anything interesting. I did a little refactoring
2697 # mostly to fix emacs indent bug.
2698
2699 # Generates sparklines.
2700 _spark_echo()
2701 {
2702   if [ "X$1" = "X-n" ]; then
2703     shift
2704     printf "%s" "$*"
2705   else
2706     printf "%s\n" "$*"
2707   fi
2708 }
2709
2710
2711 spark()
2712 {
2713   local f tc
2714   local n numbers=
2715
2716   # find min/max values
2717   local min=0xffffffff max=0
2718
2719   for n in ${@//,/ }
2720   do
2721     # on Linux (or with bash4) we could use `printf %.0f $n` here to
2722     # round the number but that doesn't work on OS X (bash3) nor does
2723     # `awk '{printf "%.0f",$1}' <<< $n` work, so just cut it off
2724     n=${n%.*}
2725     (( n < min )) && min=$n
2726     (( n > max )) && max=$n
2727     numbers=$numbers${numbers:+ }$n
2728   done
2729
2730   # print ticks
2731   local ticks=(▁ ▂ ▃ ▄ ▅ ▆ ▇ █)
2732
2733   # use a high tick if data is constant
2734   (( min == max )) && ticks=(▅ ▆)
2735
2736   tc=${#ticks[@]}
2737   f=$(( ( (max-min) <<8)/( tc - 1) ))
2738   (( f < 1 )) && f=1
2739
2740   for n in $numbers
2741   do
2742     _spark_echo -n ${ticks[$(( (((n-min)<<8)/f) ))]}
2743   done
2744   _spark_echo
2745 }
2746
2747 pdfwc() { local f; for f; do echo "$f" "$(pdfinfo "$f" | awk '/^Pages:/ {print $2}')"; done }
2748
2749
2750 # nvm install script appended this to my .bashrc. I dont want to run it all the time,
2751 # so put it in a function.
2752 nvm-init() {
2753   export NVM_DIR="$HOME/.nvm"
2754   # shellcheck disable=SC1091 # may not exist, & third party
2755   [ -s "$NVM_DIR/nvm.sh" ] && source "$NVM_DIR/nvm.sh"  # This loads nvm
2756   # shellcheck disable=SC1091 # may not exist, & third party
2757   [ -s "$NVM_DIR/bash_completion" ] && source "$NVM_DIR/bash_completion"  # This loads nvm bash_completion
2758 }
2759
2760
2761 leap-year() {
2762   if date -d 'february 29' &>/dev/null; then
2763     year_days=366
2764   else
2765     year_days=365
2766   fi
2767   echo $year_days
2768 }
2769
2770 # on-battery
2771 on-bat() {
2772   if [[ -e /sys/class/power_supply/AC/online && $(</sys/class/power_supply/AC/online) == 0 ]]; then
2773     return 1
2774   fi
2775 }
2776
2777 # make vim work with my light colortheme terminal.
2778 vim() {
2779   if [[ -e ~/.vimrc ]]; then
2780     command vim "$@"
2781   else
2782     command vim -c ':colorscheme peachpuff' "$@"
2783   fi
2784 }
2785
2786 # ls count. usage: pass a directory, get the number of files.
2787 # https://unix.stackexchange.com/questions/90106/whats-the-most-resource-efficient-way-to-count-how-many-files-are-in-a-director
2788 lsc() {
2789   ls -Uq "$@"|wc -l
2790 }
2791
2792 # run then notify. close notification after the next prompt.
2793 rn() {
2794   "$@"
2795   dunstify -u critical "$*"
2796   _psrun=(dunstctl close-all)
2797 }
2798 n() {
2799   dunstify -u critical n
2800   _psrun=(dunstctl close-all)
2801 }
2802
2803 catnew() {
2804   local dir file
2805   dir="$1"
2806   inotifywait -m "$dir" -e create -e moved_to | while read -r _ _ file; do
2807     hr
2808     cat "$dir/$file"
2809   done
2810 }
2811 # cat mail
2812 cm() {
2813   catnew /m/md/$1/new
2814 }
2815
2816
2817 # * misc stuff
2818
2819
2820 if $use_color && type -p tput &>/dev/null; then
2821   term_bold="$(tput bold)"
2822   term_red="$(tput setaf 1)"
2823   term_green="$(tput setaf 2)"
2824   # shellcheck disable=SC2034 # expected
2825   term_yellow="$(tput setaf 3)"
2826   term_purple="$(tput setaf 5)"
2827   term_nocolor="$(tput sgr0)" # no font attributes
2828
2829   # unused so far. commented for shellcheck
2830   # term_underl="$(tput smul)"
2831   # term_blue="$(tput setaf 4)"
2832   # term_cyan="$(tput setaf 6)"
2833 fi
2834 # Try to keep environment pollution down, EPA loves us.
2835 unset safe_term match_lhs use_color
2836
2837 # * prompt
2838
2839
2840 if [[ $- == *i* ]]; then
2841
2842
2843   case $HOSTNAME in
2844     bk|je|li)
2845       if [[ $EUID == 1000 ]]; then
2846         system-status _ ||:
2847       fi
2848       ;;
2849   esac
2850
2851
2852   # this needs to come before next ps1 stuff
2853   # this stuff needs bash 4, feb 2009,
2854   # old enough to no longer condition on $BASH_VERSION anymore
2855   shopt -s autocd
2856   shopt -s dirspell
2857   PS1='\w'
2858   if [[ $- == *i* ]]  && [[ ! $LC_INSIDE_EMACS ]]; then
2859     PROMPT_DIRTRIM=2
2860     bind -m vi-command B:shell-backward-word
2861     bind -m vi-command W:shell-forward-word
2862   fi
2863
2864   if [[ $SSH_CLIENT || $SUDO_USER ]]; then
2865     unset PROMPT_DIRTRIM
2866     PS1="\h:$PS1"
2867   fi
2868
2869   # emacs terminal has problems if this runs slowly,
2870   # so I've thrown a bunch of things at the wall to speed it up.
2871   prompt-command() {
2872     local return=$? # this MUST COME FIRST
2873     local ps_char ps_color
2874     unset IFS
2875
2876     if [[ $HISTFILE ]]; then
2877       history -a # save history
2878     fi
2879
2880     case $return in
2881       0) ps_color="$term_purple"
2882          ps_char='\$'
2883          ;;
2884       *) ps_color="$term_green"
2885          ps_char="$return \\$"
2886          ;;
2887     esac
2888     if [[ ! -O . ]]; then # not owner
2889       if [[ -w . ]]; then # writable
2890         ps_color="$term_bold$term_red"
2891       else
2892         ps_color="$term_bold$term_green"
2893       fi
2894     fi
2895
2896     # faster than sourceing the file im guessing
2897     if [[ -e /dev/shm/iank-status && ! -e /tmp/quiet-status ]]; then
2898       eval "$(< /dev/shm/iank-status)"
2899     fi
2900     if [[ $MAIL_HOST && $MAIL_HOST != "$HOSTNAME" ]]; then
2901       ps_char="@ $ps_char"
2902     fi
2903     jobs_char=
2904     if [[ $(jobs -p) ]]; then
2905       jobs_char='j\j '
2906     fi
2907
2908
2909     # allow a function to specify a command to run after we run the next
2910     # command. Use case: a function makes a persistent notification. If
2911     # we happen to be using that terminal, we can just keep working by
2912     # entering our next command, even a noop in order to dismiss the
2913     # notification, instead of having to explicitly dismiss it.
2914     if [[ ${_psrun[@]} ]]; then
2915       if (( _psrun_count >= 1 )); then
2916
2917         "${_psrun[@]}" ||:
2918         _psrun_count=0
2919         unset _psrun
2920       else
2921         _psrun_count=$(( _psrun_count + 1 ))
2922       fi
2923     else
2924       _psrun_count=0
2925     fi
2926
2927     # We could test if sudo is active with sudo -nv
2928     # but then we get an email and log of lots of failed sudo commands.
2929     # We could turn those off, but seems better not to.
2930     if [[ $EUID != 0 ]] && [[ $DID_SUDO ]]; then
2931       psudo="\[$term_bold$term_red\]s\[$term_nocolor\] "
2932     fi
2933     if [[ ! $HISTFILE ]]; then
2934       ps_char="NOHIST $ps_char"
2935     fi
2936     PS1="${PS1%"${PS1#*[wW]}"} $jobs_char$psudo\[$ps_color\]$ps_char\[$term_nocolor\] "
2937
2938     # copy of what is automatically added by guix.
2939     # adds [env] to PS1 if GUIX_ENVIRONMENT is set and PS1 contains '$';
2940     if [ -n "$GUIX_ENVIRONMENT" ]; then
2941       if [[ $PS1 =~ (.*)"\\$" ]]; then
2942         PS1="${BASH_REMATCH[1]} [env]\\\$ "
2943       fi
2944     fi
2945
2946
2947     # set titlebar. instead, using more advanced
2948     # titelbar below
2949     #echo -ne "$_title_escape $HOSTNAME ${PWD/#$HOME/~}  \007"
2950   }
2951   PROMPT_COMMAND=(prompt-command)
2952
2953   if [[ $TERM == screen* ]]; then
2954     _title_escape="\033]..2;"
2955   else
2956     # somme sites recommend this, i dunno what the diff is.
2957     #_title_escape="\033]30;"
2958     _title_escape="\033]0;"
2959   fi
2960
2961   # make the titlebar be the last command and the current directory.
2962   settitle () {
2963
2964
2965     # These are some checks to help ensure we dont set the title at
2966     # times that the debug trap is running other than the case we
2967     # want. Some of them might not be needed.
2968     if (( ${#FUNCNAME[@]} != 1 || ${#BASH_ARGC[@]} != 2 || BASH_SUBSHELL != 0 )); then
2969       return 0
2970     fi
2971     if [[ $1 == prompt-command ]]; then
2972       return 0
2973     fi
2974     echo -ne "$_title_escape ${PWD/#$HOME/~} "
2975     printf "%s" "$*"
2976     echo -ne "\007"
2977   }
2978
2979   # note, this wont work:
2980   # x=$(mktemp); cp a $x
2981   # I havnt figured out why, bigger fish to fry.
2982   #
2983   # for titlebar.
2984   # condition from the screen man page i think.
2985   # note: duplicated in tx()
2986   if [[ $TERM == *(screen*|xterm*|rxvt*) ]]; then
2987     trap 'settitle "$BASH_COMMAND"' DEBUG
2988   else
2989     trap DEBUG
2990   fi
2991
2992 fi
2993
2994 # * stuff that makes sense to be at the end
2995
2996
2997 # best practice
2998 unset IFS
2999
3000 if [[ -s "$HOME/.rvm/scripts/rvm" ]]; then
3001   # shellcheck disable=SC1091
3002   source "$HOME/.rvm/scripts/rvm"
3003 fi
3004
3005 # I had this idea to start a bash shell which would run an initial
3006 # command passed through this env variable, then continue on
3007 # interactively. But the use case I had in mind went away.
3008 #
3009 # if [[ $MY_INIT_CMD ]]; then
3010 #   "${MY_INIT_CMD[@]}"
3011 #   unset MY_INIT_CMD
3012 # fi
3013
3014 # ensure no bad programs appending to this file will have an affect
3015 return 0