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 if [[ -s /a/bin/errhandle/err ]]; then
   9   source /a/bin/errhandle/err
  10 elif [[ -s $bashrc_dir/err ]]; then
  11   # shellcheck source=/a/bin/errhandle/err
  12   source $bashrc_dir/err
  13 fi
  14
  15 # In t8, it runs clear_console for login shells by default. I don't want
  16 # my console cleared. And linux ttys get cleared without this.
  17 if shopt login_shell >/dev/null && [[ -e ~/.bash_logout ]]; then
  18   rm ~/.bash_logout
  19 fi
  20
  21 # if [[ -s /usr/share/bash-completion/completions/git ]]; then
  22 #   source /usr/share/bash-completion/completions/git
  23 # fi
  24 # if [[ -s /usr/share/bash-completion/completions/gitk ]]; then
  25 #   source /usr/share/bash-completion/completions/gitk
  26 # fi
  27
  28 # for testing error catching:
  29 # t2() {
  30 #   echo t2
  31 #   grep sdf sdfd
  32 #   echo wtf
  33 # }
  34 # t1() {
  35 #   echo t1
  36 #   t2 a b c
  37 # }
  38
  39 # * settings
  40
  41 CDPATH=.
  42
  43
  44 # remove all aliases. aliases provided by the system tend to get in the way,
  45 # for example, error happens if I try to define a function the same name as an alias
  46 unalias -a
  47
  48 # remove gnome keyring warning messages
  49 # there is probably a more proper way, but I didnt find any easily on google
  50 # now using xfce+xmonad instead of vanilla xmonad, so disabling this
  51 #unset GNOME_KEYRING_CONTROL
  52
  53 # use extra globing features.
  54 shopt -s extglob
  55 # include .files when globbing, but ignore files name . and ..
  56 # setting this also sets dotglob.
  57 export GLOBIGNORE="*/.:*/.."
  58
  59 # Useful info. see man bash.
  60 PS4='$LINENO+ '
  61
  62
  63 # broken with bash_completion package. Saw a bug for this once. dont anymore.
  64 # still broken in wheezy
  65 # still buggered in latest stable from the web, version 2.1
  66 # perhaps its fixed in newer git version, which fails to make for me
  67 # this note is from 6-2014.
  68 # still broken in flidas.
  69 #shopt -s nullglob
  70
  71 # make tab on an empty line do nothing
  72 shopt -s no_empty_cmd_completion
  73
  74 # fix spelling errors for cd, only in interactive shell
  75 shopt -s cdspell
  76 # append history instead of overwritting it
  77 shopt -s histappend
  78 # for compatibility, per gentoo/debian bashrc
  79 shopt -s checkwinsize
  80 # attempt to save multiline single commands as single history entries.
  81 shopt -s cmdhist
  82 # enable **
  83 shopt -s globstar
  84
  85
  86 # inside emacs fixes
  87 if [[ $LC_INSIDE_EMACS ]]; then
  88   # EMACS is used by bash on startup, but we dont need it anymore.
  89   # plus I hit a bug in a makefile which inherited it
  90   unset EMACS
  91   export LC_INSIDE_EMACS
  92   export PAGER=cat
  93   export MANPAGER=cat
  94   # scp completion does not work, but this doesnt fix it. todo, figure this out
  95   #complete -r scp &> /dev/null
  96   # todo, remote file completion fails, figure out how to turn it off
  97   export NODE_DISABLE_COLORS=1
  98   # This gets rid of ugly terminal escape chars in node repl
  99   # sometime, Id like to have completion working in emacs shell for node
 100   # the offending chars can be found in lib/readline.js,
 101   # things that do like:
 102   # stream.write('\x1b[' + (x + 1) + 'G');
 103   # We can remove them and keep readline, for example by doing this
 104   # to start a repl:
 105   #!/usr/bin/env nodejs
 106   # var readline = require('readline');
 107   # readline.cursorTo = function(a,b,c) {};
 108   # readline.clearScreenDown = function(a) {};
 109   # const repl = require('repl');
 110   # var replServer = repl.start('');
 111   #
 112   # no prompt, or else readline complete seems to be confused, based
 113   # on our column being different? node probably needs to send
 114   # different kind of escape sequence that is not ugly. Anyways,
 115   # completion doesnt work yet even with the ugly prompt, so whatever
 116   #
 117   export NODE_NO_READLINE=1
 118
 119 fi
 120
 121 export SSH_CONFIG_FILE_OVERRIDE=/root/.ssh/confighome
 122
 123 # emacs has a different default search path than the info command. This
 124 # adds the info defaults to emacs, but not the reverse, because I dun
 125 # care much about the cli. The search path is only on the cli if you run
 126 # "info xxx", or in emacs if you run '(info xxx)', so not that
 127 # important, but might as well fix it.
 128
 129 # info info says this path is what was compiled, and its not documented
 130 # anywhere. Through source grepping, i found it in filesys.h of the info
 131 # source in trisquel flidas.
 132 #
 133 # Traling : means for emacs to add its own stuff on to the end.
 134
 135 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:.:
 136
 137 # for openwrt system that has no stty, this is easier than
 138 # guarding every time i use it.
 139 if ! type -p stty >/dev/null; then
 140   stty() { :; }
 141 fi
 142
 143
 144 use_color=false
 145 if [[ $- == *i* ]]; then
 146   # for readline-complete.el
 147   if [[ $LC_INSIDE_EMACS ]]; then
 148     # all for readline-complete.el
 149     stty echo
 150     bind 'set horizontal-scroll-mode on'
 151     bind 'set print-completions-horizontally on'
 152     bind '"\C-i": self-insert'
 153   else
 154
 155
 156     if [[ $TERM != dumb ]] && test -t 1; then
 157       use_color=true
 158     fi
 159
 160     if [[ $KONSOLE_PROFILE_NAME ]]; then
 161       TERM=xterm-256color
 162     fi
 163
 164     if [[ $TERM == alacritty && ! -e /usr/share/terminfo/a/alacritty ]]; then
 165       # todo: we should try installing the alacritty terminfo if it is not found
 166       # https://github.com/alacritty/alacritty/issues/2838
 167       TERM=xterm-256color
 168     fi
 169
 170     # copying from the alacritty example above,
 171     if [[ $TERM == xterm-kitty ]]; then
 172       if [[ ! -e /usr/share/terminfo/x/xterm-kitty ]]; then
 173         TERM=xterm-256color
 174       else
 175         if [[ -e /a/opt/kitty/shell-integration/bash/kitty.bash ]]; then
 176           KITTY_SHELL_INTEGRATION=t
 177           source /a/opt/kitty/shell-integration/bash/kitty.bash
 178         fi
 179       fi
 180     fi
 181
 182     # todo: not sure this works in sakura
 183     #stty werase undef
 184     #bind "\C-w": kill-region
 185     # sakura == xterm-256color
 186     # konsole == xterm
 187     if [[ $TERM != xterm-kitty && $TERM == xterm* ]]; then
 188       # control + arrow keys. for other terminals, see http://unix.stackexchange.com/questions/10806/how-to-change-previous-next-word-shortcut-in-bash
 189       bind '"\e[1;5C": shell-forward-word' 2>/dev/null
 190       bind '"\e[1;5D": shell-backward-word' 2>/dev/null
 191     else
 192       # make ctrl-backspace work. for konsole, i fixed it through
 193       # /home/iank/.local/share/konsole/default.keytab
 194       stty werase ^h
 195       bind '"\eOc": shell-forward-word'
 196       bind '"\eOd": shell-backward-word'
 197     fi
 198     # i cant remember why i did this, probably to free up some keys to bind
 199     # to other things in bash.
 200     # other than C-c and C-z, the rest defined by stty -a are, at least in
 201     # gnome-terminal, overridden by bash, or disabled by the system
 202     stty  lnext undef stop undef start undef
 203   fi
 204
 205 fi
 206
 207 case $TERM in
 208   # fixup broken backspace in chroots
 209   xterm-kitty|alacritty)
 210     chroot() {
 211       TERM=xterm-256color command chroot "$@"
 212     }
 213     ;;
 214 esac
 215
 216 export BC_LINE_LENGTH=0
 217
 218 # ansible option
 219 export PROFILE_TASKS_TASK_OUTPUT_LIMIT=100
 220
 221 # note, if I use a machine I dont want files readable by all users, set
 222 # umask 077  # If fewer than 4 digits are entered, leading zeros are assumed
 223
 224 # i for insensitive. the rest from
 225 # X means dont remove the current screenworth of output upon exit
 226 # R means to show colors n things
 227 # a useful flag is -F aka --quit-if-one-screen
 228 export LESS=RXij12
 229 export SYSTEMD_LESS=$LESS
 230
 231 export NNN_COLORS=2136
 232
 233 export SL_FILES_DIR=/b/ds/sl/.iank
 234 export SL_INFO_DIR=/p/sshinfo
 235
 236
 237 # * include files
 238
 239 if [[ -s $bashrc_dir/path-add-function ]]; then
 240   source $bashrc_dir/path-add-function
 241   if [[ $SSH_CLIENT ]]; then
 242     if grep -qF /home/iank/.iank/e/e /etc/exports &>/dev/null; then
 243       export EMACSDIR=/home/iank/.iank/e/e
 244     fi
 245     path-add $bashrc_dir
 246   fi
 247 fi
 248
 249 # if someone exported $SOE (stop on error), catch errors.
 250 #
 251 # Note, on debian this results in the following warning when in ssh,
 252 # hich I haven't figured out how to fix. It doesn't happen if we source
 253 # after the shell has started
 254 #
 255 # bash: /usr/share/bashdb/bashdb-main.inc: No such file or directory
 256 # bash: warning: cannot start debugger; debugging mode disabled
 257 if [[ $SOE ]]; then
 258   if [[ -e /a/bin/errhandle/err ]]; then
 259     source /a/bin/errhandle/err
 260   fi
 261 fi
 262
 263
 264
 265
 266 mysrc() {
 267   local path dir file
 268   path=$1
 269   dir=${path%/*}
 270   file=${path##*/}
 271   if [[ -s $path ]]; then
 272     source $path
 273   elif [[ -s $bashrc_dir/$file ]]; then
 274     source $bashrc_dir/$file
 275   fi
 276 }
 277
 278
 279 mysrc /a/bin/small-misc-bash/ll-function
 280 mysrc /a/bin/distro-functions/src/package-manager-abstractions
 281
 282 # things to remember:
 283 # ALT-C - cd into the selected directory
 284 # CTRL-T - Paste the selected file path into the command line
 285 #
 286 # good guide to some of its basic features is the readme file
 287 # https://github.com/junegunn/fzf
 288
 289 # if [[ -s /usr/share/doc/fzf/examples/key-bindings.bash ]]; then
 290 #   source /usr/share/doc/fzf/examples/key-bindings.bash
 291 # fi
 292
 293 # * functions
 294
 295 ### begin FSF section ###
 296
 297 # Comments before functions are meant to be good useful
 298 # documentation. If they fail at that, please improve them or send Ian a
 299 # note.
 300
 301 ## copy bash completion
 302 # Usage: ORIGINAL_COMMAND TARGET_COMMAND...
 303 #
 304 # It copies how the bash completion works from one command to other
 305 # commands.
 306 ccomp() {
 307   local c src
 308   src=$1
 309   shift
 310   if ! c=$(complete -p $src 2>/dev/null); then
 311     _completion_loader $src &>/dev/null ||:
 312     c=$(complete -p $src 2>/dev/null) || return 0
 313   fi
 314   # remove $src( .*|$)
 315   c=${c% $src}
 316   c=${c%% $src *}
 317   eval $c $*
 318 }
 319
 320 ## directory history tracking and navigation.
 321 #
 322 # cd becomes a function, also aliased to c. b to go back, f to go
 323 # forward, cl to list recent directories and choose one.
 324 #
 325 # The finer details you may want to skip:
 326 #
 327 # We also define bl to print the list of back and forward directories.
 328 #
 329 # We keep 2 stacks, forward and back. Unlike with a web browser, the
 330 # forward stack is not erased when going somewhere new.
 331 #
 332 # Recent directories are stored in ~/.cdirs.
 333 #
 334 declare -a _dir_forward _dir_back
 335 c() {
 336   # normally, the top of _dir_back is our current dir. if it isn't,
 337   # put it on there, except we don't want to do that when we
 338   # just launched a shell
 339   if [[ $OLDPWD ]]; then
 340     if (( ${#_dir_back[@]} == 0 )) || [[ ${_dir_back[-1]} != "$PWD" ]]; then
 341       _dir_back+=("$PWD")
 342     fi
 343   fi
 344   command cd "$@"
 345   if (( ${#_dir_back[@]} == 0 )) || [[ ${_dir_back[-1]} != "$PWD" ]]; then
 346     _dir_back+=("$PWD")
 347   fi
 348   echo "$PWD" >> ~/.cdirs
 349 }
 350 ccomp cd c
 351
 352 # back
 353 b() {
 354   local top_back
 355   if (( ${#_dir_back[@]} == 0 )); then
 356     echo "nothing left to go back to" >&2
 357     return 0
 358   fi
 359   top_back="${_dir_back[-1]}"
 360
 361   if [[ $top_back == "$PWD" ]] && (( ${#_dir_back[@]} == 1 )); then
 362     echo "already on last back entry" >&2
 363     return 0
 364   fi
 365
 366
 367   if [[ $top_back == "$PWD" ]]; then
 368     # add to dirf if not already there
 369     if (( ${#_dir_forward[@]} == 0 )) || [[ ${_dir_forward[-1]} != "$top_back" ]]; then
 370       _dir_forward+=("$top_back")
 371     fi
 372     unset "_dir_back[-1]"
 373     command cd "${_dir_back[-1]}"
 374   else
 375     if (( ${#_dir_forward[@]} == 0 )) || [[ ${_dir_forward[-1]} != "$PWD" ]]; then
 376       _dir_forward+=("$PWD")
 377     fi
 378     command cd "$top_back"
 379   fi
 380
 381   # Interesting feature, not sure I want it.
 382   # give us a peek at what is next in the list
 383   # if (( ${#_dir_back[@]} >= 2 )); then
 384   #   printf "%s\n" "${_dir_back[-2]}"
 385   # fi
 386   #
 387
 388   # c/b/f Implementation notes:
 389   #
 390   # The top of the back is $PWD
 391   # as long as the last directory change was due to c,b,or cl.
 392   #
 393   # Example of stack changes:
 394   #
 395   # a b c (d)
 396   ## back
 397   # a b (c)
 398   # d
 399   #back
 400   #a (b)
 401   #d c
 402   #back
 403   #(a)
 404   #d c b
 405   #forward
 406   #a (b)
 407   #d c
 408   #
 409   # a b c
 410   ## back
 411   # a b
 412   # (c)
 413   ## forward
 414
 415 }
 416 # forward
 417 f() {
 418   local top_forward
 419   if (( ${#_dir_forward[@]} == 0 )); then
 420     echo "no forward dir left" >&2
 421     return 0
 422   fi
 423   top_forward="${_dir_forward[-1]}"
 424   unset "_dir_forward[-1]"
 425   c "$top_forward"
 426
 427   # give us a peek at what is next in the list
 428   # if (( ${#_dir_forward[@]} )); then
 429   #   printf "%s\n" "${_dir_forward[-1]}"
 430   # fi
 431 }
 432 # cd list
 433 cl() {
 434   local i line input start
 435   local -A buttondirs alines
 436   local -a buttons dirs lines
 437   buttons=( {a..z} {2..9} )
 438   if [[ ! -s ~/.cdirs ]]; then
 439     echo nothing in ~/.cdirs
 440     return 0
 441   fi
 442
 443   i=0
 444
 445   mapfile -t lines <~/.cdirs
 446   start=$(( ${#lines[@]} - 1 ))
 447
 448   # we have ~33 buttons as of this writing, so lets
 449   # prune down the history every once in a while.
 450   if (( start > 500 )); then
 451     tac ~/.cdirs | awk '!seen[$0]++' | head -n 200 | tac | sponge ~/.cdirs || [[ $? == 141 ]]
 452   fi
 453
 454   for (( j=$start; j >= 0; j-- )); do
 455     line="${lines[$j]}"
 456     if [[ ! $line || ${alines[$line]} || ! -d "$line" || $line == "$PWD" || line == "$HOME"  ]]; then
 457       continue
 458     fi
 459     alines[$line]=t
 460     buttondirs[${buttons[i]}]="$line"
 461     printf "%s %s\n" ${buttons[i]} "$line"
 462     if (( i == ${#buttons[@]} - 1 )); then
 463       break
 464     fi
 465     i=$(( i + 1 ))
 466   done
 467
 468   if (( i == 0 )); then
 469     echo "no dirs in ~/.cdirs"
 470     return 0
 471   fi
 472   read -r -N 1 input
 473   if [[ $input != $'\n' ]]; then
 474     c "${buttondirs[$input]}"
 475   fi
 476 }
 477 # back list
 478 bl() {
 479   local start i j max
 480   max=10
 481   start=$(( ${#_dir_back[@]} - 1 ))
 482
 483   # cleanup possible repeating of pwd
 484   if (( start >= 0 )) && [[ ${_dir_back[$start]} == "$PWD" ]]; then
 485     start=$(( start - 1 ))
 486   fi
 487   j=1
 488   if (( start >= 0 )); then
 489     for (( i=$start; i >= 0 ; i-- )); do
 490       printf "%s %s\n" $j ${_dir_back[i]}
 491       j=$(( j + 1 ))
 492       if (( j >= max )); then
 493         break
 494       fi
 495     done
 496   fi
 497
 498   max=10
 499   start=$(( ${#_dir_forward[@]} - 1 ))
 500
 501   # cleanup possible repeating of pwd
 502   if (( start >= 0 )) && [[ ${_dir_forward[$start]} == "$PWD" ]]; then
 503     start=$(( start - 1 ))
 504   fi
 505   if (( start < 0 )); then
 506     return 0
 507   fi
 508   echo --
 509   j=1
 510   for (( i=$start; i >= 0 ; i-- )); do
 511     printf "%s %s\n" $j ${_dir_forward[i]}
 512     j=$(( j + 1 ))
 513     if (( j >= max )); then
 514       break
 515     fi
 516   done
 517 }
 518
 519 # pee do. run args as a command with output copied to syslog.
 520 #
 521 # Usage: pd [-t TAG] COMMAND...
 522 #
 523 # -t TAG Override the tag in the syslog. The default is COMMAND with
 524 #        any path part is removed, eg. for /bin/cat the tag is cat.
 525 #
 526 # You can view the log via "journalctl -t TAG"
 527 pd() {
 528   local tag ret
 529   ret=0
 530   tag=${1##*/}
 531   case $1 in
 532     -t) tag="$2"; shift 2 ;;
 533   esac
 534   echo "PWD=$PWD command: $*" | logger -t $tag
 535   "$@" |& pee cat "logger -t $tag" || ret=$?
 536   echo "exited with status=$ret" | pee cat "logger -t $tag"
 537   # this avoids any err-catch
 538   (( $ret == 0 )) || return $ret
 539 }
 540 ccomp time pd
 541
 542 # jdo = journal do. Run command as transient systemd service, tailing
 543 # its output in the journal until it completes.
 544 #
 545 # Usage: jdo COMMAND...
 546 #
 547 # Compared to pd: commands recognize this is a non-interactive shell.
 548 # The service is unaffected if our ssh connection dies, no need to run
 549 # in screen or tmux.
 550 #
 551 # Note: The last few lines of any existing entries for a unit by that
 552 # name will be output first, and there will be a few second delay at the
 553 # start of the command, and a second or so at the end.
 554 #
 555 # Note: Functions and aliases obviously won't work, we resolve the
 556 # command to a file.
 557 #
 558 # Note: requires running as root.
 559 jdo() {
 560   local cmd cmd_name jr_pid ret
 561   ret=0
 562   cmd="$1"
 563   shift
 564   if [[ $EUID != 0 ]]; then
 565     echo "jdo: error: rerun as root"
 566     return 1
 567   fi
 568   cmd_name=${cmd##*/}
 569   if [[ $cmd != /* ]]; then
 570     cmd=$(type -P "$cmd")
 571   fi
 572   # -q = quiet
 573   journalctl -qn2 -f -u "$cmd_name" &
 574   # Trial and error of time needed to avoid missing initial lines.
 575   # .5 was not reliable. 1 was not reliable. 2 was not reliable
 576   sleep 4
 577   jr_pid=$!
 578   systemd-run --unit "$cmd_name" --wait --collect "$cmd" "$@" || ret=$?
 579   # The sleep lets the journal output its last line
 580   # before the prompt comes up.
 581   sleep .5
 582   kill $jr_pid &>/dev/null ||:
 583   unset jr_pid
 584   fg &>/dev/null ||:
 585   # this avoids any err-catch
 586   (( $ret == 0 )) || return $ret
 587 }
 588 ccomp time jdo
 589 #### end fsf section
 590
 591
 592 ..() { c ..; }
 593 ...() { c ../..; }
 594 ....() { c ../../..; }
 595 .....() { c ../../../..; }
 596 ......() { c ../../../../..; }
 597
 598 chere() {
 599   local f path
 600   for f; do
 601     path=$(readlink -e "$f")
 602     echo "cat >$path <<'EOF'"
 603     cat "$f"
 604     echo EOF
 605   done
 606 }
 607
 608
 609 # file cut copy and paste, like the text buffers :)
 610 # I havnt tested these.
 611 _fbufferinit() { # internal use
 612   ! [[ $my_f_tempdir ]] && my_f_tempdir=$(mktemp -d)
 613   rm -rf "${my_f_tempdir:?}"/*
 614 }
 615 fcp() { # file cp
 616   _fbufferinit
 617   cp "$@" "$my_f_tempdir"/
 618 }
 619 fct() { # file cut
 620   _fbufferinit
 621   mv "$@" "$my_f_tempdir"/
 622 }
 623 fpst() { # file paste
 624   [[ $2 ]] && { echo too many arguments; return 1; }
 625   target=${1:-.}
 626   cp "$my_f_tempdir"/* "$target"
 627 }
 628
 629 _khfix_common() {
 630   local host ip port file key
 631   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" ||: )
 632   file=$(readlink -f ~/.ssh/known_hosts)
 633   if [[ ! $ip ]]; then
 634     echo "khfix: ssh failed"
 635     return 1
 636   fi
 637   if [[ $port != 22 ]]; then
 638     ip_entry="[$ip]:$port"
 639     host_entry="[$host]:$port"
 640   else
 641     ip_entry=$ip
 642     host_entry=$host
 643   fi
 644   tmpfile=$(mktemp)
 645   if [[ $host != $ip ]]; then
 646     key=$(ssh-keygen -F "$host_entry" -f $file | sed -r 's/^.*([^ ]+ +[^ ]+) *$/\1/')
 647     if [[ $key ]]; then
 648       grep -Fv "$key" "$file" | sponge "$file"
 649     fi
 650   fi
 651   key=$(ssh-keygen -F "$ip_entry" -f $file | sed -r 's/^.*([^ ]+ +[^ ]+) *$/\1/')
 652   if [[ $key ]]; then
 653     grep -Fv "$key" "$file" | sponge "$file"
 654   fi
 655   ll ~/.ssh/known_hosts
 656   rootsshsync
 657 }
 658 khfix() { # known hosts fix
 659   _khfix_common "$@" || return 1
 660   ssh $1 :
 661 }
 662 khcopy() {
 663   _khfix_common "$@"
 664   ssh-copy-id $1
 665 }
 666
 667 # ya, hacky hardcoded hostnames in 2023. we could do better
 668 hssh-update() {
 669   for host in kd x3.office.fsf.org syw; do
 670     e $host
 671     scp /b/fai/fai/config/files/usr/local/bin/hssh/IANK root@$host:/usr/local/bin/hssh
 672   done
 673 }
 674
 675 a() {
 676   local x
 677   x=$(readlink -nf "${1:-$PWD}")
 678   # yes, its kinda dumb that xclip/xsel cant do this in one invocation
 679   echo -n "$x" | xclip -selection clipboard
 680   echo -n "$x" | xclip
 681 }
 682
 683 # a1 = awk {print $1}
 684 for field in {1..20}; do
 685   eval a$field"() { awk '{print \$$field}'; }"
 686 done
 687 # h1 = head -n1
 688 for num in {1..9}; do
 689   eval h$num"() { head -n$num; }"
 690 done
 691
 692
 693 hexipv4() {
 694   printf '%d.%d.%d.%d\n' $(echo $1 | sed 's/../0x& /g')
 695 }
 696
 697 vp9() {
 698   local f out outdir in fname origdir skip1
 699   origdir="$PWD"
 700   outdir=vp9
 701   skip1=false
 702   while [[ $1 == -* ]]; do
 703     case $1 in
 704       # if we got interrupted after 1st phase
 705       -2)
 706         skip1=true
 707         shift
 708         ;;
 709       --out)
 710         outdir=$2
 711         shift 2
 712         ;;
 713     esac
 714   done
 715   m mkdir -p $outdir
 716   # first pass only uses about 1 cpu, so run in parallel
 717   for f; do
 718     {
 719       fname="${f##*/f}"
 720       if [[ $f == /* ]]; then
 721         in="$f"
 722       else
 723         in=$origdir/$f
 724       fi
 725       out="$origdir/$outdir/$fname"
 726       mkdir -p /tmp/vp9/$fname
 727       cd /tmp/vp9/$fname
 728       if ! $skip1 && [[ ! -s ffmpeg2pass-0.log ]]; then
 729         # -nostdin or else wait causes ffmpeg to go into stopped state. dunno why, random stackoverflow answer.
 730         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
 731       fi
 732       if [[ -e $out ]]; then rm -f $out; fi
 733       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 $out
 734     } &
 735   done
 736   wait -f
 737   cd "$origdir"
 738 }
 739
 740 utcl() { # utc 24 hour time to local hour 24 hour time
 741   echo "print( ($1  $(date +%z | sed -r 's/..$//;s/^(-?)0*/\1/')) % 24)"|python3
 742 }
 743
 744 bwm() {
 745   s bwm-ng -T avg -d
 746 }
 747
 748
 749 # for running in a fai rescue. iank specific.
 750 kdrescue() {
 751   d=vgata-Samsung_SSD_850_EVO_2TB_S2RLNX0J502123D
 752   for f in $d vgata-Samsung_SSD_870_QVO_8TB_S5VUNG0N900656V; do
 753     cryptsetup luksOpen --key-file /p /dev/$f/root crypt-$f-root
 754     cryptsetup luksOpen --key-file /p /dev/$f/o crypt-$f-o
 755   done
 756   mount -o subvol=root_trisquelaramo /dev/mapper/crypt-$d-root /mnt
 757   mount -o subvol=a /dev/mapper/crypt-$d-root /mnt/a
 758   mount -o subvol=o /dev/mapper/crypt-$d-o /mnt/o
 759   mount -o subvol=boot_trisquelaramo /dev/sda2 /mnt/boot
 760   cd /mnt
 761   chrbind
 762 }
 763
 764
 765
 766
 767 c4() { c /var/log/exim4; }
 768
 769 caa() { git commit --amend --no-edit -a; }
 770
 771 cf() {
 772   for f; do
 773     hr
 774     echo "$f"
 775     hr
 776     cat "$f"
 777   done
 778 }
 779 caf() {
 780   # shellcheck disable=SC2033
 781   find -L "$@" -type f -not \( -name .svn -prune -o -name .git -prune \
 782        -o -name .hg -prune -o -name .editor-backups -prune \
 783        -o -name .undo-tree-history -prune \) \
 784        -exec bash -c '. ~/.bashrc; hr; echo "$1"; hr; cat "$1"' _ {} \; 2>/dev/null
 785
 786 }
 787 ccomp cat cf caf
 788
 789 calc() { echo "scale=3; $*" | bc -l; }
 790 # no having to type quotes, but also no command history:
 791 clc() {
 792   local x
 793   read -r x
 794   echo "scale=3; $x" | bc -l
 795 }
 796
 797 cam() {
 798   git commit -am "$*"
 799 }
 800
 801 ccat () { # config cat. see a config without extra lines.
 802   sed -r '/^[[:space:]]*([;#]|--|\/\/|$)/d' "$@"
 803 }
 804 ccomp grep ccat
 805
 806 chrbind() {
 807   local d
 808   # dev/pts needed for pacman signature check
 809   for d in dev proc sys dev/pts; do
 810     [[ -d $d ]]
 811     if ! mountpoint $d &>/dev/null; then
 812       m s mount -o bind /$d $d
 813     fi
 814   done
 815 }
 816 chumount() {
 817   local d
 818   # dev/pts needed for pacman signature check
 819   for d in dev/pts dev proc sys; do
 820     [[ -d $d ]]
 821     if mountpoint $d &>/dev/null; then
 822       m s umount $d
 823     fi
 824   done
 825 }
 826
 827
 828 _cdiff-prep() {
 829   # join options which are continued to multiples lines onto one line
 830   local first=true
 831   while IFS= read -r line; do
 832     # remove leading spaces/tabs. assumes extglob
 833     if [[ $line == "[   ]*" ]]; then
 834       line="${line##+( )}"
 835     fi
 836     if $first; then
 837       pastline="$line"
 838       first=false
 839     elif [[ $line == *=* ]]; then
 840       echo "$pastline" >> "$2"
 841       pastline="$line"
 842     else
 843       pastline="$pastline $line"
 844     fi
 845   done < <(grep -vE '^([ \t]*#|^[ \t]*$)' "$1")
 846   echo "$pastline" >> "$2"
 847 }
 848
 849 cdiff() {
 850   # diff config files,
 851   # setup for format of postfix, eg:
 852   # option = stuff[,]
 853   #    [more stuff]
 854   local pastline unified f1 f2
 855   unified="$(mktemp)"
 856   f1="$(mktemp)"
 857   f2="$(mktemp)"
 858   _cdiff-prep "$1" "$f1"
 859   _cdiff-prep "$2" "$f2"
 860   cat "$f1" "$f2" |  grep -Po '^[^=]+=' | sort | uniq > "$unified"
 861   while IFS= read -r line; do
 862     # the default bright red / blue doesnt work in emacs shell
 863     dwdiff -cblue,red -A best -d "      ," <(grep "^$line" "$f1" || echo ) <(grep "^$line" "$f2" || echo ) | colordiff
 864   done < "$unified"
 865 }
 866
 867
 868 cat-new-files() {
 869   local start=$SECONDS
 870   local dir="$1"
 871   # shellcheck disable=SC2030
 872   inotifywait -m "$dir" -e create -e moved_to | \
 873     while read -r filedir _ file; do
 874       cat "$filedir$file"
 875       hr
 876       calc $((SECONDS - start)) / 60
 877       sleep 5
 878     done
 879
 880 }
 881
 882 chownme() {
 883   s chown -R $USER:$USER "$@"
 884 }
 885
 886 # shellcheck disable=SC2032
 887 chown() {
 888   # makes it so chown -R symlink affects the symlink and its target.
 889   if [[ $1 == -R ]]; then
 890     shift
 891     command chown -h "$@"
 892     command chown -R "$@"
 893   else
 894     command chown "$@"
 895   fi
 896 }
 897
 898 cim() {
 899   git commit -m "$*"
 900 }
 901
 902
 903 d() { builtin bg "$@"; }
 904 ccomp bg d
 905
 906 # f would be more natural, but i already am using it for something
 907 z() { builtin fg "$@"; }
 908 ccomp fg z
 909
 910 x() { builtin kill %%; }
 911
 912 dc() {
 913   diff --strip-trailing-cr -w "$@"   # diff content
 914 }
 915 ccomp diff dc
 916
 917 despace() {
 918   local x y
 919   for x in "$@"; do
 920     y="${x// /_}"
 921     safe_rename "$x" "$y"
 922   done
 923 }
 924
 925 # df progress
 926 # usage: dfp MOUNTPOINT [SECOND_INTERVAL]
 927 # SECOND_INTERVAL defaults to 90
 928 dfp() {
 929   # mp = mountpoint
 930   local a b mp interval
 931   mp=$1
 932   interval=${2:-90}
 933   if [[ ! $mp ]]; then
 934     echo "dfp: error, missing 1st arg" >&2
 935     return 1
 936   fi
 937   while true; do
 938     a=$(df --output=used $mp | tail -n1)
 939     sleep $interval
 940     b=$(df --output=used $mp | tail -n1)
 941     printf "used mib: %'d  mib/min: %s\n" $(( b /1000 )) $(( (b-a) / (interval * 1000 / 60 ) ))
 942   done
 943 }
 944
 945 # get ipv4 ip from HOST. or if it is already a number, return that
 946 hostip() {
 947   local host="$1"
 948   case $host in
 949     [0-9:])
 950       echo "$host"
 951       ;;
 952     *)
 953       getent ahostsv4 "$host" | awk '{ print $1 }' | head -n1
 954       ;;
 955   esac
 956 }
 957
 958 dig() {
 959   command dig +nostats +nocmd "$@"
 960 }
 961 # Output with sections sorted, and removal of query id, so 2 dig outputs can be diffed.
 962 digsort() {
 963   local sec
 964   sec=
 965   dig +nordflag "$@" | sed -r 's/^(;; ->>HEADER<<-.*), id: .*/\1/' | while read -r l; do
 966     if [[ $l == [^\;]* ]]; then
 967       sec+="$l"$'\n'
 968     else
 969       if [[ $sec ]]; then
 970         printf "%s" "$sec" | sort
 971         sec=
 972       fi
 973       printf "%s\n" "$l"
 974     fi
 975   done
 976 }
 977 ccomp dig digsort
 978 # compare digs to the 2 servers
 979 # usage: digdiff @server1 @server2 DIG_ARGS
 980 # note: only the soa master nameserver will respond with
 981 # ra "recursive answer" flag. That difference is meaningless afaik.
 982 digdiff() {
 983   local s1 s2
 984   s1=$1
 985   shift
 986   s2=$1
 987   shift
 988   digsort $s1 "$@" | tee /tmp/digdiff
 989   diff -u /tmp/digdiff <(digsort $s2 "$@")
 990 }
 991
 992 # date in a format i like reading
 993 dt() {
 994   date "+%A, %B %d, %r" "$@"
 995 }
 996 dtr() {
 997   date -R "$@"
 998 }
 999 # date with all digits in a format i like
1000 dtd() {
1001   date +%F_%T% "$@"
1002 }
1003 ccomp date dt dtr dtd
1004
1005 dus() { # du, sorted, default arg of
1006   du -sh ${@:-*} | sort -h
1007 }
1008 ccomp du dus
1009
1010
1011 e() { printf "%s\n" "$*"; }
1012
1013 # echo args
1014 ea() {
1015   if (( ! $# )); then
1016     echo no args
1017   fi
1018   for arg; do
1019     printf "%qEOL\n" "${arg}"
1020     printf "%s" "${arg}" |& hexdump -C
1021   done
1022 }
1023
1024 # echo variables. print var including escapes, etc, like xxd for variable
1025 ev() {
1026   if (( ! $# )); then
1027     echo no args
1028   fi
1029   for arg; do
1030     if [[ -v $arg ]]; then
1031       printf "%qEOL\n" "${!arg}"
1032       printf "%s" "${!arg}" |& hexdump -C
1033     else
1034       echo arg $arg is unset
1035     fi
1036   done
1037 }
1038
1039 ediff() {
1040   [[ ${#@} == 2 ]] || { echo "error: ediff requires 2 arguments"; return 1; }
1041   emacs --eval "(ediff-files \"$1\" \"$2\")"
1042 }
1043
1044 # mail related
1045 etail() {
1046   ngset
1047   tail -F /var/log/exim4/mainlog /var/log/exim4/*main /var/log/exim4/paniclog /var/log/exim4/*panic -n 200 "$@"
1048   ngreset
1049 }
1050 etailm() {
1051   tail -F /var/log/exim4/mainlog -n 200 "$@"
1052 }
1053 etail2() {
1054   tail -F /var/log/exim4/mymain -n 200 "$@"
1055 }
1056 ccomp tail etail etail2
1057
1058 # ran into this online, trying it out
1059 detach() {
1060   ( "$@" &>/dev/null & disown )
1061 }
1062
1063 showkeys() {
1064   ssh "$@" cat .ssh/authorized_keys{,2}
1065 }
1066
1067
1068 # print exim old pids
1069 eoldpids() {
1070   local configtime pid piduptime now daemonpid
1071   printf -v now '%(%s)T' -1
1072   configtime=$(stat -c%Y /var/lib/exim4/config.autogenerated)
1073   if [[ -s /run/exim4/exim.pid ]]; then
1074     daemonpid=$(cat /run/exim4/exim.pid)
1075   fi
1076   for pid in $(pgrep -f '^/usr/sbin/exim4( |$)'); do
1077     # the daemonpid gets reexeced on HUP (service reloads), keeping its same old timestamp
1078     if [[ $pid == $daemonpid ]]; then
1079       continue
1080     fi
1081     piduptime=$(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
1082     if (( configtime > now - piduptime )); then
1083       echo $pid
1084     fi
1085   done
1086 }
1087
1088 # exim tail but only watch lines from new pids
1089 etailnew() {
1090   local pid oldpids
1091   for pid in $(eoldpids); do
1092     oldpids+="$pid|"
1093   done
1094   if [[ $oldpids ]]; then
1095     etail | awk '$3 !~ /^\[('"${oldpids%|}"')\]$/'
1096   else
1097     etail
1098   fi
1099 }
1100 # exim watch as old pids go away
1101 ewatchold() {
1102   local configtime pid piduptime now
1103   local -i count
1104   local -a oldpids
1105   count=0
1106   while true; do
1107     oldpids=($(eoldpids))
1108     if (( ! ${#oldpids[@]} )); then
1109       return
1110     fi
1111     # print the date every 20 iterations
1112     if (( ! count % 20 )); then
1113       date
1114     fi
1115     count+=1
1116     ps -f -p "${oldpids[*]}"
1117     sleep 1
1118   done
1119 }
1120
1121 eless() {
1122   less /var/log/exim4/mainlog
1123 }
1124 ccomp less eless
1125 eqcat() {
1126   exiqgrep -ir.\* -o 60 | while read -r i; do
1127     hlm exim -Mvc $i
1128     echo
1129     hlm exigrep $i /var/log/exim4/mainlog | cat ||:
1130   done
1131 }
1132 eqrmf() {
1133   # other ways to get the list of message ids:
1134   # exim -bp | awk 'NF == 4 {print $3}'
1135   # # this is slower 160ms, vs 60.
1136   # exipick -i
1137   exiqgrep -ir.\* | xargs exim -Mrm
1138 }
1139
1140 econfdevnew() {
1141   rm -rf /tmp/edev
1142   mkdir -p /tmp/edev/etc
1143   cp -ra /etc/exim4 /tmp/edev/etc
1144   cp -ra /etc/alias* /tmp/edev/etc
1145   find /tmp/edev/etc/exim4 -type f -execdir sed -i "s,/etc/,/tmp/edev/etc/,g" '{}' +
1146   econfdev
1147 }
1148 econfdev() {
1149   update-exim4.conf -d /tmp/edev/etc/exim4 -o /tmp/edev/e.conf
1150 }
1151
1152 # exim grep in
1153 # show important information about incoming mail in the exim log
1154 egrin() {
1155   sed -rn '/testignore|jtuttle|eximbackup/!s/^[^ ]+ ([^ ]+) [^ ]+ [^ ]+ <= ([^ ]+).*T="(.*)" from (<[^ ]+> .*$)/\1 \4\n \3/p' <${1:-/var/log/exim4/mainlog}
1156 }
1157
1158 # 2nd line is message-id:
1159 egrinid() {
1160   sed -rn '/testignore|jtuttle|eximbackup/!s/^[^ ]+ ([^ ]+) [^ ]+ [^ ]+ <= ([^ ]+).* id=([^ ]+) T="(.*)" from (<[^ ]+> .*$)/\1 \5\n \3\n \4/p' <${1:-/var/log/exim4/mainlog}
1161 }
1162 etailin() {
1163   tail -F /var/log/exim4/mainlog | sed -rn '/testignore|jtuttle|eximbackup/!s/^[^ ]+ ([^ ]+) [^ ]+ [^ ]+ <= ([^ ]+).*T="(.*)" from (<[^ ]+> .*$)/\1 \4\n \3/p'
1164 }
1165
1166
1167
1168
1169 fa() {
1170   # find array. make an array of file names found by find into $x
1171   # argument: find arguments
1172   # return: find results in an array $x
1173   while read -rd ''; do
1174     x+=("$REPLY");
1175   done < <(find "$@" -print0);
1176 }
1177
1178 faf() { # find all files. use -L to follow symlinks
1179   find "$@" -not \( -name .svn -prune -o -name .git -prune \
1180        -o -name .hg -prune -o -name .editor-backups -prune \
1181        -o -name .undo-tree-history -prune \) -type f 2>/dev/null
1182 }
1183
1184 # usage ffconcat FILES_TO_CONCAT OUTPUT_FILE
1185 ffconcat() {
1186   local tmpf
1187   tmpf=$(mktemp)
1188   printf "file '%s'\n" "$1" >$tmpf
1189   while (( $# > 1 )); do
1190     shift
1191     printf "file '%s'\n" "$1" >>$tmpf
1192   done
1193   # https://trac.ffmpeg.org/wiki/Concatenate
1194   ffmpeg -f concat -safe 0 -i $tmpf -c copy "$1"
1195   rm $tmpf
1196 }
1197 ffremux() {
1198   local tmpf tmpd
1199   if (( $# == 0 )); then
1200     echo ffremux error expected args >&2
1201     return 1
1202   fi
1203   tmpd=$(mktemp -d)
1204   for f; do
1205     tmpf=$tmpd/"${f##*/}"
1206     ffmpeg -i "$f" -c:v copy -c:a copy $tmpf
1207     cat $tmpf >"$f"
1208   done
1209   rm -r $tmpd
1210 }
1211
1212
1213
1214 # absolute path of file/dir without resolving symlinks.
1215 #
1216 # Most of the time, I want this where I would normally use readlink.
1217 # This is what realpath -s does in most cases, but sometimes it
1218 # actually resolves symlinks, at least when they are in /.
1219 #
1220 # Note, if run on a dir, if the final component is relative, it won't
1221 # resolve that. Use the below fpd for that.
1222 #
1223 # note: we could make a variation of this which
1224 # assigns to a variable name using eval, so that we don't have to do
1225 # x=$(fp somepath), which might save subshell overhead and look nice,
1226 # but I'm not going to bother.
1227 fp() {
1228   local initial_oldpwd initial_pwd dir base
1229   initial_oldpwd="$OLDPWD"
1230   initial_pwd="$PWD"
1231   if [[ $1 == */* ]]; then
1232     dir="${1%/*}"
1233     base="/${1##*/}"
1234     # CDPATH because having it set will cause cd to possibly print output
1235     CDPATH= cd "$dir"
1236     printf "%s%s\n" "$PWD" "$base"
1237     CDPATH= cd "$initial_pwd"
1238     OLDPWD="$initial_oldpwd"
1239   else
1240     printf "%s/%s\n" "$PWD" "$1"
1241   fi
1242 }
1243 # full path of directory without resolving symlinks
1244 fpd() {
1245   local initial_oldpwd initial_pwd dir
1246   initial_oldpwd="$OLDPWD"
1247   initial_pwd="$PWD"
1248   dir="$1"
1249   CDPATH= cd "$dir"
1250   printf "%s%s\n" "$PWD" "$base"
1251   cd "$initial_pwd"
1252   OLDPWD="$initial_oldpwd"
1253 }
1254
1255
1256 # mail related
1257 frozen() {
1258   rm -rf /tmp/frozen
1259   sudo mailq |gr frozen|awk '{print $3}' | while read -r id; do
1260     sudo exim -Mvl $id
1261     echo
1262     sudo exim -Mvh $id
1263     echo
1264     sudo exim -Mvb $id
1265     echo -e '\n\n##############################\n'
1266   done | tee -a /tmp/frozen
1267 }
1268 frozenrm() {
1269   local ids=()
1270   while read -r line; do
1271     printf '%s\n' "$line"
1272     ids+=($(printf '%s\n' "$line" |gr frozen|awk '{print $3}'))
1273   done < <(s mailq)
1274   echo "sleeping for 2 in case you change your mind"
1275   sleep 2
1276   sudo exim -Mrm "${ids[@]}"
1277 }
1278
1279 funce() {
1280   # like -e for functions. returns on error.
1281   # at the end of the function, disable with:
1282   # trap ERR
1283   trap 'echo "${BASH_COMMAND:+BASH_COMMAND=\"$BASH_COMMAND\" }
1284 ${FUNCNAME:+FUNCNAME=\"$FUNCNAME\" }${LINENO:+LINENO=\"$LINENO\"  }\$?=$?"
1285 trap ERR
1286 return' ERR
1287 }
1288
1289 getdir () {
1290   local help="Usage: getdir [--help] PATH
1291 Output the directory of PATH, or just PATH if it is a directory."
1292   if [[ $1 == --help ]]; then
1293     echo "$help"
1294     return 0
1295   fi
1296   if [[ $# -ne 1 ]]; then
1297     echo "getdir error: expected 1 argument, got $#"
1298     return 1
1299   fi
1300   if [[ -d $1 ]]; then
1301     echo "$1"
1302   else
1303     local dir
1304     dir="$(dirname "$1")"
1305     if [[ -d $dir ]]; then
1306       echo "$dir"
1307     else
1308       echo "getdir error: directory does not exist"
1309       return 1
1310     fi
1311   fi
1312 }
1313
1314 git_empty_branch() { # start an empty git branch. carefull, it deletes untracked files.
1315   [[ $# == 1 ]] || { echo 'need a branch name!'; return 1;}
1316   local root
1317   root=$(gitroot) || return 1 # function to set gitroot
1318   builtin cd "$root"
1319   git symbolic-ref HEAD refs/heads/$1
1320   rm .git/index
1321   git clean -fdx
1322 }
1323
1324 # shellcheck disable=SC2120
1325 gitroot() {
1326   local help="Usage: gitroot [--help]
1327 Print the full path to the root of the current git repo
1328
1329 Handles being within a .git directory, unlike git rev-parse --show-toplevel,
1330 and works in older versions of git which did not have that."
1331   if [[ $1 == --help ]]; then
1332     echo "$help"
1333     return
1334   fi
1335   local p
1336   p=$(git rev-parse --git-dir) || { echo "error: not in a git repo" ; return 1; }
1337   [[ $p != /* ]] && p=$PWD
1338   echo "${p%%/.git}"
1339 }
1340
1341 g() {
1342
1343   # todo: patch emacs so it will look elsewhere. this is kinda sad:
1344   # https://emacs.stackexchange.com/questions/4253/how-to-start-emacs-with-a-custom-user-emacs-directory
1345
1346   local args gdb=false
1347
1348   if [[ $EMACSDIR ]]; then
1349     path-add "$EMACSDIR/lib-src" "$EMACSDIR/src"
1350   fi
1351
1352   if [[ $DISPLAY ]]; then
1353     args=-n
1354   fi
1355
1356   if (( $# == 0 )); then
1357     args+=" -c"
1358   fi
1359   # duplicate -c, but oh well
1360   if ! pgrep -u $EUID emacsclient; then
1361     if (( $# == 0 )) && type -p gdb &>/dev/null; then
1362       gdb=true
1363     else
1364       args+=" -c"
1365     fi
1366   fi
1367   if [[ $EMACSDIR ]]; then
1368     # Alter the path here, otherwise the nfs mount gets triggered on the
1369     # first path lookup when emacs is not being used.
1370     PATH="$EMACSDIR/lib-src:$EMACSDIR/src:$PATH" EHOME=$HOME HOME=$EMACSDIR m emacsclient -a "" $args "$@"
1371   else
1372     if $gdb; then
1373       # due to a bug, we cant debug from the start unless we get a new gdb
1374       # https://sourceware.org/bugzilla/show_bug.cgi?id=24454
1375       # m gdb -ex="set follow-fork-mode child" -ex=r -ex=quit --args emacs --daemon
1376       m emacsclient -a "" $args "$@"
1377       sleep 1
1378       cd /a/opt/emacs-$(distro-name)$(distro-num)
1379       s gdb -p $(pgrep -f 'emacs --daemon') -ex c
1380       cd -
1381     else
1382       m emacsclient -a "" $args "$@"
1383     fi
1384   fi
1385 }
1386
1387 # force terminal version
1388 gn() {
1389   g -n "$@"
1390 }
1391
1392 gmacs() {
1393   # quit will prompt if the program crashes.
1394   gdb -ex=r -ex=quit --args emacs "$@"; r;
1395 }
1396
1397 gdkill() {
1398   # kill the emacs daemon
1399   pk1 emacs --daemon
1400 }
1401
1402 gr() {
1403   grep -iIP --color=auto "$@" || return $?
1404 }
1405 grr() { # grep recursive
1406   # Don't return 1 on nonmatch because this is meant to be
1407   # interactive, not in a conditional.
1408   if [[ ${#@} == 1 ]]; then
1409     grep --exclude-dir='*.emacs.d' --exclude-dir='*.git' -riIP --color=auto "$@" . || [[ $? == 1 ]]
1410   else
1411     grep --exclude-dir='*.emacs.d' --exclude-dir='*.git' -riIP --color=auto "$@" || [[ $? == 1 ]]
1412   fi
1413 }
1414 ccomp grep gr grr
1415
1416 rg() { grr "$@"; }
1417 ccomp grep rg
1418
1419 # recursive everything. search for files/dirs and lines. rs = easy chars to press
1420 re() {
1421   local query
1422   query="$1"
1423   find "$@" -not \( -name .svn -prune -o -name .git -prune \
1424        -o -name .hg -prune -o -name .editor-backups -prune \
1425        -o -name .undo-tree-history -prune \) 2>/dev/null | grep -iP --color=auto "$query"
1426   grr -m 5 "$@"
1427 }
1428
1429 hr() { # horizontal row. used to break up output
1430   printf "$(tput setaf 5 2>/dev/null ||:)█$(tput sgr0 2>/dev/null||:)%.0s" $(eval echo "{1..${COLUMNS:-60}}")
1431   echo
1432 }
1433 # highlight
1434 hl() {
1435   local col input_len=0
1436   for arg; do
1437     input_len=$((input_len + 1 + ${#arg}))
1438   done
1439   col=$((60 - input_len))
1440   printf "\e[1;97;41m%s" "$*"
1441   if (( col > 0 )); then
1442     printf "\e[1;97;41m \e[0m%.0s" $(eval echo "{1..${col}}")
1443   fi
1444   echo
1445 }
1446 hlm() { hl "$*";  "$@"; }
1447
1448 hrcat() { local f; for f; do [[ -f $f ]] || continue; hr; echo "$f"; cat "$f"; done }
1449
1450
1451 # get latest hub and run it
1452 # main command to use:
1453 # hub pull-request --no-edit
1454 # --no-edit means to use the first commit\'s message as the pull request message.
1455 # If that fails, try doing
1456 # hub pull-request --no-edit -b UPSTREAM_OWNER:branch
1457 # where branch is usually master. it does the pr against your current branch.
1458 #
1459 # On first use, you input username/pass and it gets an oath token so you dont have to repeat
1460 # it\'s at ~/.config/hub
1461 hub() {
1462   local up uptar updir p v
1463   # example https://github.com/github/hub/releases/download/v2.14.2/hub-linux-amd64-2.14.2.tgz
1464   up=$(wget -q -O- https://api.github.com/repos/github/hub/releases/latest | jq -r .assets[].browser_download_url | grep linux-amd64)
1465   re='[[:space:]]'
1466   if [[ ! $up || $up == $re ]]; then
1467     echo "failed to get good update url. got: $up"
1468   fi
1469   uptar=${up##*/}
1470   updir=${uptar%.tgz}
1471   if [[ ! -e /a/opt/$updir ]]; then
1472     rm -rf /a/opt/hub-linux-amd64*
1473     wget -P /a/opt $up
1474     tar -C /a/opt -zxf /a/opt/$uptar
1475     rm -f /a/opt/$uptar
1476   fi
1477   if ! which hub &>/dev/null; then
1478     sudo /a/opt/$updir/install
1479   fi
1480
1481   # save token across computers
1482   if [[ ! -L ~/.config/hub ]]; then
1483     if [[ -e ~/.config/hub  ]]; then
1484       mv ~/.config/hub /p/c/subdir_files/.config/
1485     fi
1486     if [[ -e /p/c/subdir_files/.config/hub ]]; then
1487       conflink
1488     fi
1489   fi
1490   command hub "$@"
1491 }
1492
1493 i() { git "$@"; }
1494 ccomp git i
1495
1496 # git status:
1497 # cvs -qn update
1498
1499 # git checkout FILE
1500 # cvs update -C FILE
1501
1502 # git pull
1503 # cvs up[date]
1504
1505 # potentially useful command translation
1506 # https://fling.seas.upenn.edu/~giesen/dynamic/wordpress/equivalent-commands-for-git-svn-and-cvs/
1507
1508 # importing cvs repo into git using git-cvs package:
1509 # /f/www $ /usr/lib/git-core/git-cvsimport -C /f/www-git
1510
1511 ic() {
1512   # fast commit all
1513   git commit -am "$*"
1514 }
1515
1516 ipp() {
1517   git pull
1518   git push
1519 }
1520
1521 ifn() {
1522   local glob
1523   glob="$1"
1524   shift
1525   find -L "$@" -not \( -name .svn -prune -o -name .git -prune \
1526        -o -name .hg -prune -o -name .editor-backups -prune \
1527        -o -name .undo-tree-history -prune \) -iname "*$glob*" 2>/dev/null
1528 }
1529
1530 ifh() {
1531   # insensitive find here. args are combined into the search string.
1532   # -L = follow symlinks
1533   find -L . -not \( -name .svn -prune -o -name .git -prune \
1534        -o -name .hg -prune -o -name .editor-backups -prune \
1535        -o -name .undo-tree-history -prune \) -iname "*$**" 2>/dev/null
1536 }
1537
1538 ifd() {
1539   # insensitive find directory
1540   find -L . -type d -not \( -name .svn -prune -o -name .git -prune \
1541        -o -name .hg -prune -o -name .editor-backups -prune \
1542        -o -name .undo-tree-history -prune \) -iname "*$**" 2>/dev/null
1543 }
1544
1545
1546 ipdrop() {
1547   sudo iptables -A INPUT -s $1 -j DROP
1548 }
1549
1550
1551 istext() {
1552   grep -Il "" "$@" &>/dev/null
1553 }
1554
1555 pst() {
1556   pstree -apnA
1557 }
1558
1559 jtail() {
1560   journalctl -n 10000 -f "$@"
1561 }
1562 jr() { journalctl "$@" ; }
1563 jrf() { journalctl -f "$@" ; }
1564 jru() {
1565   journalctl -u exim4 _SYSTEMD_INVOCATION_ID=$(systemctl show -p InvocationID --value $1)
1566 }
1567
1568
1569
1570 l() {
1571   if [[ $PWD == /[iap] ]]; then
1572     command ls -A --color=auto -I lost+found "$@"
1573   else
1574     command ls -A --color=auto "$@"
1575   fi
1576 }
1577
1578 lcn() { locate -i "*$**"; }
1579
1580 lg() { LC_COLLATE=C.UTF-8 ll --group-directories-first "$@"; }
1581
1582 lt() { ll -tr "$@"; }
1583
1584 lld() { ll -d "$@"; }
1585
1586 ccomp ls l lg lt lld ll
1587
1588 # low recursively
1589 lowr() {
1590   local f dirs i a
1591   local -a all
1592   for dirs in false true; do
1593     for f; do
1594       if [[ -d $f ]]; then
1595         all=("$f"/**)
1596         # reverse the order to rename the nested dirs first.
1597         # note: 0 element is the dir itself
1598         for ((i=${#all[@]}-1; i>=1; i--)); do
1599           a="${all[i]}"
1600           if $dirs && [[ -d $a ]]; then
1601             # e dirs low "$a" # debug
1602             low "$a"
1603           elif ! $dirs && [[ ! -d $a && -e $a ]]; then
1604             # debug
1605             # e not dirs low "$a" # debug
1606             low "$a"
1607           fi
1608         done
1609       fi
1610       # just rename all the top level args on the second pass
1611       if $dirs; then
1612         # e final dirs low "$f" # debug
1613         low "$f"
1614       fi
1615     done
1616   done
1617 }
1618
1619 low() {  # make filenames lowercase, remove bad chars
1620   local arg new dir f
1621   for arg; do
1622     arg="${arg%%+(/)}" # remove trailing slashes. assumes we have extglob on.
1623     dir="${arg%/*}"
1624     if (( ${#dir} == ${#arg} )); then
1625       dir=.
1626     fi
1627     f="${arg##*/}"
1628     new="${f,,}" # downcase
1629     new="${new//[^a-zA-Z0-9._-]/_}" # sub bad chars
1630     new="${new#"${new%%[[:alnum:]]*}"}" # remove leading/trailing non-alnum
1631     new="${new%"${new##*[[:alnum:]]}"}"
1632     # remove bad underscores, like __ and _._
1633     new=$(echo $new | sed -r 's/__+/_/g;s/_+([.-])|([.-])_+/\1/g')
1634     safe_rename "$dir/$f" "$dir/$new" || return 1
1635   done
1636   return 0
1637 }
1638
1639 lower() { # make first letter of filenames lowercase.
1640   local x
1641   for x in "$@"; do
1642     if [[ ${x::1} == [A-Z] ]]; then
1643       y=$(tr '[:upper:]' '[:lower:]' <<<"${x::1}")"${x:1}"
1644       safe_rename "$x" "$y" || return 1
1645     fi
1646   done
1647 }
1648
1649
1650 k() { # history search
1651   grep -iP --binary-files=text "$@" ${HISTFILE:-~/.bash_history}  | tail -n 80 || [[ $? == 1 ]];
1652 }
1653 ks() { # history search with context
1654   # args are an extended regex used by sed
1655   history | sed -nr "h;s/^\s*(\S+\s+){4}//;/$*/{g;p}" | tail -n 80 || [[ $? == 1 ]];
1656 }
1657 ksu() { # history search unique
1658   grep -P --binary-files=text "$@" ${HISTFILE:-~/.bash_history}  | uniq || [[ $? == 1 ]];
1659 }
1660
1661 # todo: id like to do maybe a daily or hourly cronjob to
1662 # check that my history file size is increasing. Ive had it
1663 # inexplicably truncated in the past.
1664 histrm() {
1665   history -n
1666   HISTTIMEFORMAT= history | awk -v IGNORECASE=1 '{ a=$1; sub(/^ *[^ ]+ */, "") }; /'"$*"'/'
1667   read -p "press anything but contrl-c to delete"
1668   for entry in $(HISTTIMEFORMAT= history | awk -v IGNORECASE=1 '{ a=$1; sub(/^ *[^ ]+ */, "") }; /'"$*"'/ { print a }' | tac); do
1669     history -d $entry
1670   done
1671   history -w
1672 }
1673
1674 ccomp grep k ks ksu histrm
1675
1676
1677 make-targets() {
1678   # show make targets, via http://stackoverflow.com/questions/3063507/list-goals-targets-in-gnu-make
1679   make -qp | awk -F':' '/^[a-zA-Z0-9][^$#\/\t=]*:([^=]|$)/ {split($1,A,/ /);for(i in A)print A[i]}'
1680 }
1681
1682 mkc() {
1683   mkdir "$1"
1684   c "$1"
1685 }
1686 ccomp mkdir mkc
1687
1688 mkct() {
1689   mkc $(mktemp -d)
1690 }
1691 # mkdir the last arg, cp the rest into it
1692 mkcp() {
1693   mkdir -p "${@: -1}"
1694   cp "${@:1:$#-1}" "${@: -1}"
1695 }
1696 mkmv() {
1697   mkdir -p "${@: -1}"
1698   mv "${@:1:$#-1}" "${@: -1}"
1699 }
1700
1701 mkt() { # mkdir and touch file
1702   local path="$1"
1703   mkdir -p "$(dirname "$path")"
1704   touch "$path"
1705 }
1706
1707 # shellcheck disable=SC2032
1708 mkdir() { command mkdir -p "$@"; }
1709
1710 nags() {
1711   # https://github.com/HenriWahl/Nagstamon/issues/357
1712   if ! pgrep -f /usr/lib/notification-daemon/notification-daemon >/dev/null; then
1713     /usr/lib/notification-daemon/notification-daemon &
1714   fi
1715   /usr/bin/nagstamon &
1716 }
1717
1718 nmt() {
1719   # cant use s because sudo -i doesnt work for passwordless sudo command
1720   case $EUID in
1721     0)
1722       sudo nmtui-connect "$@"
1723       ;;
1724     *)
1725       nmtui-connect "$@"
1726       ;;
1727   esac
1728 }
1729
1730
1731 ngset() {
1732   if shopt nullglob >/dev/null; then
1733     ngreset=false
1734   else
1735     shopt -s nullglob
1736     ngreset=true
1737   fi
1738 }
1739 ngreset() {
1740   if $ngreset; then
1741     shopt -u nullglob
1742   fi
1743 }
1744
1745 nopanic() {
1746   # shellcheck disable=SC2024
1747   ngset
1748   for f in /var/log/exim4/paniclog /var/log/exim4/*panic; do
1749     base=${f##*/}
1750     if [[ -s $f ]]; then
1751       echo ================== $f =============
1752       s tee -a /var/log/exim4/$base-archive <$f
1753       s truncate -s0 $f
1754     fi
1755   done
1756   ngreset
1757 }
1758
1759
1760 ping() { command ping -O "$@"; }
1761 p8() { ping "$@" 8.8.8.8; }
1762 p6() { ping6 "$@" 2001:4860:4860::8888; }
1763
1764 pkx() { # package extract
1765   local pkg cached tmp f
1766   c $(mktemp -d)
1767   pkg=$1
1768   # shellcheck disable=SC2012
1769   cached=$(ls -t /var/cache/apt/archives/$pkg* | tail -n1 2>/dev/null) ||:
1770   if [[ $cached ]]; then
1771     cp $cached .
1772   else
1773     aptitude download $pkg || return 1
1774   fi
1775   tmp=(*); f=${tmp[0]} # only 1 expected
1776   ex $f
1777   rm -f $f
1778 }
1779
1780 # pgrep and kill
1781 pk1() {
1782   local pid
1783   pid=($(pgrep -f "$*"))
1784   case ${#pid[@]} in
1785     1)
1786       # shellcheck disable=SC2128
1787       {
1788         ps -F $pid
1789         m kill $pid
1790       }
1791       ;;
1792     0) echo "no pid found" ;;
1793     *)
1794       ps -F ${pid[@]}
1795       ;;
1796   esac
1797 }
1798
1799 psg () {
1800   local x y help
1801   help="Usage: psg [--help] GREP_ARGS
1802 grep ps and output in a nice format"
1803   if [[ $1 == --help ]]; then
1804     echo "$help"
1805     return
1806   fi
1807   x=$(ps -eF)
1808   # final grep is because some commands tend to have a lot of trailing spaces
1809   y=$(echo "$x" | grep -iP "$@" | grep -o '.*[^ ]') ||:
1810   if [[ $y ]]; then
1811     echo "$x" | head -n 1 || [[ $? == 141 ]]
1812     echo "$y"
1813   fi
1814 }
1815
1816 pubip() { curl -4s https://icanhazip.com; }
1817 pubip6() { curl -6s https://icanhazip.com; }
1818 whatismyip() { pubip; }
1819
1820
1821 q() { # start / launch a program in the backround and redir output to null
1822   "$@" &> /dev/null &
1823 }
1824
1825 # shellcheck disable=SC2120
1826 r() {
1827   if [[ $HISTFILE ]]; then
1828     history -a # save history
1829   fi
1830   trap ERR # this avoids a segfault
1831   exit ${1:0}
1832   # i had this redir, not sure why
1833   #  exit "$@" 2>/dev/null
1834 }
1835
1836 # scp is insecure and deprecated.
1837 scp() {
1838   rsync -Pt --inplace "$@"
1839 }
1840 ccomp rsync scp
1841
1842 randport() {
1843   # available high ports are 1024-65535,
1844   # but lets skip things that are more likely to be in use
1845   python3 <<'EOF'
1846 import secrets
1847 print(secrets.SystemRandom().randrange(10002,65500))
1848 EOF
1849 }
1850
1851 # reapply bashrc
1852 reb() {
1853   source ~/.bashrc
1854 }
1855
1856 rl() {
1857   readlink -f "$@"
1858 }
1859 ccomp readlink rl
1860
1861 rsd() {
1862   # rsync, root is required to keep permissions right.
1863   # rsync  --archive --human-readable --verbose --itemize-changes --checksum \(-ahvic\) \
1864     #                                   --no-times --delete
1865   # basically, make an exact copy, use checksums instead of file times to be more accurate
1866   rsync -ahvic --delete "$@"
1867 }
1868 rsa() {
1869   # like rlu, but dont delete files on the target end which
1870   # do not exist on the original end.
1871   rsync -ahvic "$@"
1872 }
1873 rst() {
1874   # rl without preserving modification time.
1875   rsync -ahvic --delete --no-t "$@"
1876 }
1877 # [RSYNC_OPTS] HOST PATH
1878 rsu() {
1879   # eg. rsu -opts frodo /testpath
1880   # relative paths will expanded with readlink -f.
1881   opts=("${@:1:$#-2}") #  1 to last -2
1882   path="${*:$#}" # last
1883   host="${*:$#-1:1}" # last -1
1884   if [[ $path == .* ]]; then
1885     path=$(readlink -f $path)
1886   fi
1887   m rsync -ahvi --relative --no-implied-dirs "${opts[@]}" "$path" "root@$host:/";
1888 }
1889 ccomp rsync rsd rsa rst rsu
1890
1891 # find programs listening on a port
1892 ssp() {
1893   local port=$1
1894   # to figure out these args, i had to look at the man page from git version, as of 2022-04.
1895   s ss -lpn state listening sport = $port
1896 }
1897
1898 resolvcat() {
1899   local f
1900   if [[ $(systemctl is-active nscd ||:) != inactive ]]; then
1901     m s nscd -i hosts
1902   fi
1903   f=/etc/resolv.conf
1904   echo $f:;  ccat $f
1905   hr; s ss -lpn sport = 53
1906   if systemctl is-enabled dnsmasq &>/dev/null || [[ $(systemctl is-active dnsmasq ||:) != inactive ]]; then
1907     # this will fail is dnsmasq is failed
1908     hr; m ser status dnsmasq | cat || :
1909     f=/etc/dnsmasq.conf
1910     hr; echo $f:;  ccat $f
1911     hr; m grr '^ *(servers-file|server) *=|^ *no-resolv *$' /etc/dnsmasq.conf /etc/dnsmasq.d
1912     f=/etc/dnsmasq-servers.conf
1913     hr; echo $f:;  ccat $f
1914   fi
1915   hr
1916   echo /etc/nsswitch.conf:
1917   grep '^ *hosts:' /etc/nsswitch.conf
1918   if systemctl is-enabled systemd-resolved &>/dev/null || [[ $(systemctl is-active systemd-resolved ||:) != inactive ]]; then
1919     hr; m ser status systemd-resolved | cat || :
1920     hr; m resolvectl status | cat
1921   fi
1922
1923 }
1924 rcat() {
1925   resolvcat | less
1926 }
1927 reresolv() {
1928   if [[ $(systemctl is-active nscd ||:) != inactive ]]; then
1929     m ser stop nscd
1930     sleep .5
1931     m ser start nscd
1932     m sudo nscd -i hosts
1933   fi
1934   if [[ $(systemctl is-active dnsmasq ||:) != inactive ]]; then
1935     m sudo systemctl restart dnsmasq
1936   fi
1937   if [[ $(systemctl is-active systemd-resolved ||:) != inactive ]]; then
1938     m sudo systemctl restart systemd-resolved
1939   fi
1940   if type -P resolvectl &>/dev/null; then
1941     resolvectl flush-caches
1942   fi
1943 }
1944
1945 # add annoyingly long argument which should be the default
1946 sedi() {
1947   sed -i --follow-symlinks "$@"
1948 }
1949
1950 rmstrips() {
1951   ssh fencepost head -n 300 /gd/gnuorg/EventAndTravelInfo/rms-current-trips.txt | less
1952 }
1953
1954 urun () {
1955   umask $1
1956   shift
1957   "$@"
1958 }
1959 sudo () {
1960   command sudo "$@" || return $?
1961   DID_SUDO=true
1962 }
1963 s() {
1964   # background
1965   # I use a function because otherwise we cant use in a script,
1966   # cant assign to variable.
1967   #
1968   # note: gksudo is recommended for X apps because it does not set the
1969   # home directory to the same, and thus apps writing to ~ fuck things up
1970   # with root owned files.
1971   #
1972   if [[ $EUID != 0 || $1 == -* ]]; then
1973     # shellcheck disable=SC2034
1974     SUDOD="$PWD" command sudo -i "$@"
1975     DID_SUDO=true
1976   else
1977     "$@"
1978   fi
1979 }
1980 sb() { # sudo bash -c
1981   # use sb instead of s is for sudo redirections,
1982   # eg. sb 'echo "ok fine" > /etc/file'
1983   # shellcheck disable=SC2034
1984   local SUDOD="$PWD"
1985   sudo -i bash -c "$@"
1986 }
1987 # secret sudo
1988 se() { s urun 0077 "$@"; }
1989 ccomp sudo s sb se
1990
1991 safe_rename() { # warn and dont rename if file exists.
1992   # mv -n exists, but it\'s silent
1993   if [[ $# != 2 ]]; then
1994     echo safe_rename error: $# args, need 2 >2
1995     return 1
1996   fi
1997   if [[ $1 != "$2" ]]; then # yes, we want to silently ignore this
1998     if [[ -e $2 || -L $2 ]]; then
1999       echo "Cannot rename $1 to $2 as it already exists."
2000     else
2001       mv -vi "$1" "$2"
2002     fi
2003   fi
2004 }
2005
2006
2007 sd() {
2008   sudo dd status=none of="$1"
2009 }
2010
2011 ser() {
2012   if type -p systemctl &>/dev/null; then
2013     s systemctl "$@"
2014   else
2015     if (( $# >= 3 )); then
2016       echo iank: ser expected 2 or less arguments
2017       return 1
2018     fi
2019     s service $2 $1
2020   fi
2021 }
2022 serstat() {
2023   systemctl -n 40 status "$@"
2024 }
2025
2026 seru() { systemctl --user "$@"; }
2027 # like restart, but do nothing if its not already started
2028 srestart() {
2029   local service=$1
2030   if [[ $(s systemctl --no-pager show -p ActiveState $service ) == ActiveState=active ]]; then
2031     systemctl restart $service
2032   fi
2033 }
2034
2035 setini() { # set a value in a .ini style file
2036   key="$1" value="$2" section="$3" file="$4"
2037   if [[ -s $file ]]; then
2038     sed -ri -f - "$file" <<EOF
2039 # remove existing keys
2040 / *\[$section\]/,/^ *\[[^]]+\]/{/^\s*$key[[:space:]=]/d}
2041 # add key
2042 /^\s*\[$section\]/a $key=$value
2043 # from section to eof, do nothing
2044 /^\s*\[$section\]/,\$b
2045 # on the last line, if we haven't found section yet, add section and key
2046 \$a [$section]\\
2047 $key=$value
2048 EOF
2049   else
2050     cat >"$file" <<EOF
2051 [$section]
2052 $key=$value
2053 EOF
2054   fi
2055 }
2056
2057 sgo() { # service go
2058   service=$1
2059   ser restart $service || return 1
2060   if type -p systemctl &>/dev/null; then
2061     ser enable $service
2062   fi
2063 }
2064 soff () {
2065   for service; do
2066     # ignore services that dont exist
2067     if systemctl cat $service &>/dev/null; then
2068       ser stop $service;
2069       ser disable $service
2070     fi
2071   done
2072 }
2073
2074 sgu() {
2075   systemctl list-unit-files | rg "$@"
2076 }
2077
2078
2079 sk() {
2080
2081
2082   # disable a warning with:
2083   # shellcheck disable=SC2206 # reasoning
2084
2085   # see bash-template/style-guide.md for justifications
2086
2087   local quotes others
2088   quotes=2048,2068,2086,2206
2089   others=2029,2033,2054,2164
2090   shellcheck -W 999 -x -e $quotes,$others "$@" || return $?
2091 }
2092
2093
2094 # sl: ssh, but firsh rsync our bashrc and related files to a special
2095 # directory on the remote host if needed.
2096
2097 # Some environment variables and files need to be setup for this to work
2098 # (mine are set at the beginning of this file)
2099
2100 # SL_FILES_DIR: Environment variable. Path to folder which should at
2101 # least have a .bashrc file or symlink. This dir will be rsynced to ~ on
2102 # remote hosts (top level symlinks are resolved) unless the host already
2103 # has a $SL_FILES_DIR/.bashrc. In that case, we assume it is a host you
2104 # control and sync files to separately and already has the ~/.bashrc you
2105 # want. The remote bash will also take its .inputrc config from this
2106 # folder (default of not existing is fine). Mine looks like this:
2107 # https://iankelling.org/git/?p=distro-setup;a=tree;f=sl/.iank
2108
2109 # SL_INFO_DIR: Environment variable. This folder stores info about what
2110 # we detected on the remote system and when we last synced. It will be created
2111 # if it does not exist. Sometimes you may want to forget about a
2112 # remote system, you can use sl --rsync, or the function for that slr
2113 # below.
2114
2115 # SL_TEST_CMD: Env var. Meant to be used to vary the files synced
2116 # depending on the remote host. Run this string on the remote host the
2117 # first time sl is run (or if we run slr). The result is passed to
2118 # SL_TEST_HOOK. For example,
2119 # export SL_TEST_CMD=". /etc/os-release ; echo \${VERSION//[^a-zA-Z0-9]/}"
2120
2121 # SL_TEST_HOOK: Env var. It is run as $SL_TEST_HOOK. This can set
2122 # $SL_FILES_DIR to vary the files synced.
2123
2124 # SL_RSYNC_ARGS: Env var. String of arguments passed to rsync. For
2125 # example to exclude files within a directory. Note, excluded
2126 # files wont be deleted on rsync, you can add --delete-excluded
2127 # to the rsync command if that is desired.
2128
2129 # SL_SSH_ARGS: Env var. Default arguments passed to ssh.
2130
2131 # For when ~/.bashrc is already customized on the remote server, you
2132 # might find it problematic that ~/.bashrc is sourced for ALL ssh
2133 # commands, even in scripts. This paragraph is all about that. bash
2134 # scripts dont source ~/.bashrc, but call ssh in scripts and you get
2135 # ~/.bashrc. You dont want this. .bashrc is meant for interactive shells
2136 # and if you customize it, probably has bugs from time to time. This is
2137 # bad. Here's how I fix it. I have a special condition to "return" in my
2138 # .bashrc for noninteractive ssh shells (copy that code). Then use this
2139 # function or similar that passes LC_USEBASHRC=t when sshing and I want
2140 # my bashrc. Also, I don't keep most of my bashrc in .bashrc, i source a
2141 # separate file because even if I return early on, the whole file gets
2142 # parsed which can fail if there is a syntax error.
2143 sl() {
2144   # Background on LC_USEBASHRC var (no need to read if you just want to
2145   # use this function): env variables sent across ssh are strictly
2146   # limited, but we get LC_* at least in debian based machines, so we
2147   # just make that * be something no normal program would use. Note, on
2148   # hosts that dont allow LC_* I start an inner shell with LC_USEBASHRC
2149   # set, and the inner shell also allows running a nondefault
2150   # .bashrc. This means the outer shell still ran the default .bashrc,
2151   # but that is the best we can do.
2152
2153   local now args remote dorsync haveinfo tmpa sshinfo tmp tmp2 type info_sec force_rsync \
2154         sync_dirname testcmd extra_info testbool files_sec sl_test_cmd sl_test_hook
2155   declare -a args tmpa
2156
2157   args=($SL_SSH_ARGS)
2158
2159   # ssh [-1246Antivivisectionist] [-b bind_address] [-c cipher_spec] [-D [bind_address:]port]
2160   # [-E log_file] [-e escape_char] [-F configfile] [-I pkcs11] [-i identity_file] [-L address]
2161   # [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port] [-Q query_option]
2162   # [-R address] [-S ctl_path] [-W host:port] [-w local_tun[:remote_tun]] [user@]hostname
2163   # [command]
2164
2165   # ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]
2166   # [-D [bind_address:]port] [-E log_file] [-e escape_char]
2167   # [-F configfile] [-I pkcs11] [-i identity_file]
2168   # [-J [user@]host[:port]] [-L address] [-l login_name] [-m mac_spec]
2169   # [-O ctl_cmd] [-o option] [-p port] [-Q query_option] [-R address]
2170   # [-S ctl_path] [-W host:port] [-w local_tun[:remote_tun]]
2171
2172   force_rsync=false
2173   if [[ $1 == --rsync ]]; then
2174     force_rsync=true
2175     shift
2176   fi
2177
2178   sl_test_cmd=$SL_TEST_CMD
2179   sl_test_hook=$SL_TEST_HOOK
2180   sl_rsync_args=$SL_RSYNC_ARGS
2181   while [[ $1 ]]; do
2182     case "$1" in
2183       --rsync)
2184         force_rsync=true
2185         ;;
2186       --sl-test-cmd)
2187         sl_test_cmd="$2"
2188         shift
2189         ;;
2190       --sl-test-hook)
2191         sl_test_hook="$2"
2192         shift
2193         ;;
2194       --sl-rsync-args)
2195         sl_rsync_args="$2"
2196         shift
2197         ;;
2198       *)
2199         break
2200         ;;
2201     esac
2202     shift
2203   done
2204
2205   while [[ $1 ]]; do
2206     case "$1" in
2207       # note we dont support things like -4oOption
2208       -[46AaCfGgKkMNnqsTtVvXxYy]*)
2209         args+=("$1"); shift
2210         ;;
2211       -[bcDEeFIiJLlmOopQRSWw]*)
2212         # -oOption etc is valid
2213         if (( ${#1} >= 3 )); then
2214           args+=("$1"); shift
2215         else
2216           args+=("$1" "$2"); shift 2
2217         fi
2218         ;;
2219       *)
2220         break
2221         ;;
2222     esac
2223   done
2224   remote="$1"
2225   if [[ ! $remote ]]; then
2226     echo $0: error hostname required >&2
2227     return 1
2228   fi
2229   shift
2230
2231   if [[ ! $SL_INFO_DIR  ]]; then
2232     echo error: missing '$SL_INFO_DIR' env var >&2
2233     return 1
2234   fi
2235
2236   dorsync=false
2237   haveinfo=false
2238   tmpa=($SL_INFO_DIR/???????????"$remote")
2239   sshinfo=${tmpa[0]}
2240   if [[ -e $sshinfo ]]; then
2241     if $force_rsync; then
2242       rm -f $sshinfo
2243     else
2244       haveinfo=true
2245     fi
2246   fi
2247   if $haveinfo; then
2248     tmp=${sshinfo[0]##*/}
2249     tmp2=${tmp::11}
2250     type=${tmp2: -1}
2251     extra_info=$(cat $sshinfo)
2252   else
2253     # we test for string to know ssh succeeded
2254     testbool="test -e $SL_FILES_DIR/.bashrc -a -L .bashrc -a -v LC_USEBASHRC"
2255     testcmd="if $testbool; then printf y; else printf n; fi"
2256     if ! tmp=$(LC_USEBASHRC=y command ssh "${args[@]}" "$remote" "$testcmd; $sl_test_cmd"); then
2257       echo failed sl test. doing plain ssh -v
2258       command ssh -v "${args[@]}" "$remote"
2259     fi
2260     if [[ $tmp == y* ]]; then
2261       type=a
2262     else
2263       dorsync=true
2264       type=b
2265     fi
2266     extra_info="${tmp:1}"
2267   fi
2268   if [[ $sl_test_hook ]]; then
2269     RSYNC_RSH="ssh ${args[*]}" $sl_test_hook "$extra_info" "$remote"
2270   fi
2271
2272   if $haveinfo && [[ $type == b ]]; then
2273     info_sec=${tmp::10}
2274     read files_sec _ < <(find -L $SL_FILES_DIR -printf "%T@ %p\n" | sort -nr || [[ $? == 141 || ${PIPESTATUS[0]} == 32 ]]  )
2275     files_sec=${files_sec%%.*}
2276     if (( files_sec > info_sec )); then
2277       dorsync=true
2278       rm -f $sshinfo
2279     fi
2280   fi
2281
2282   sync_dirname=${SL_FILES_DIR##*/}
2283
2284   if [[ ! $SL_FILES_DIR  ]]; then
2285     echo error: missing '$SL_FILES_DIR' env var >&2
2286     return 1
2287   fi
2288
2289   if $dorsync; then
2290     RSYNC_RSH="ssh ${args[*]}" m rsync -rptL --delete $sl_rsync_args $SL_FILES_DIR "$remote":
2291   fi
2292   if $dorsync || ! $haveinfo; then
2293     sshinfo=$SL_INFO_DIR/$EPOCHSECONDS$type"$remote"
2294     [[ -e $SL_INFO_DIR ]] || mkdir -p $SL_INFO_DIR
2295     printf "%s\n" "$extra_info" >$sshinfo
2296     chmod 666 $sshinfo
2297   fi
2298   if [[ $type == b ]]; then
2299     if (( ${#@} )); then
2300       # Theres a couple ways to pass arguments, im not sure whats best,
2301       # but relying on bash 4.4+ escape quoting seems most reliable.
2302       command ssh "${args[@]}" "$remote" \
2303               LC_USEBASHRC=t bash -c '.\ '$sync_dirname'/.bashrc\;"\"\$@\""' bash ${@@Q}
2304     elif [[ ! -t 0 ]]; then
2305       # This case is when commands are being piped to ssh.
2306       # Normally, no bashrc gets sourced.
2307       # But, since we are doing all this, lets source it because we can.
2308       cat <(echo . $sync_dirname/.bashrc) - | command ssh "${args[@]}" "$remote" LC_USEBASHRC=t bash
2309     else
2310       command ssh -t "${args[@]}" "$remote" LC_USEBASHRC=t INPUTRC=$sync_dirname/.inputrc bash --rcfile $sync_dirname/.bashrc
2311     fi
2312   else
2313     if [[ -t 0 ]]; then
2314       LC_USEBASHRC=t command ssh "${args[@]}" "$remote" ${@@Q}
2315     else
2316       command ssh "${args[@]}" "$remote" LC_USEBASHRC=t bash
2317     fi
2318   fi
2319   # this function inspired from https://github.com/Russell91/sshrc
2320 }
2321
2322 slr() {
2323   sl --rsync "$@"
2324 }
2325 sss() { # ssh solo
2326   sl -oControlMaster=no -oControlPath=/ "$@"
2327 }
2328 # kill off old shared socket then ssh
2329 ssk() {
2330   m ssh -O exit "$@" || [[ $? == 255 ]]
2331   m sl "$@"
2332 }
2333 ccomp ssh sl slr sss ssk
2334 # plain ssh
2335 ssh() {
2336   if [[ $TERM == alacritty || $TERM == xterm-kitty ]]; then
2337     TERM=xterm-256color LC_USEBASHRC=t command ssh "$@"
2338   else
2339     LC_USEBASHRC=t command ssh "$@"
2340   fi
2341 }
2342
2343
2344 slog() {
2345   # log with script. timing is $1.t and script is $1.s
2346   # -l to save to ~/typescripts/
2347   # -t to add a timestamp to the filenames
2348   local logdir do_stamp arg_base
2349   (( $# >= 1 )) || { echo "arguments wrong"; return 1; }
2350   logdir="/a/dt/"
2351   do_stamp=false
2352   while getopts "lt" option
2353   do
2354     case $option in
2355       l ) arg_base=$logdir ;;
2356       t ) do_stamp=true ;;
2357     esac
2358   done
2359   shift $((OPTIND - 1))
2360   arg_base+=$1
2361   [[ -e $logdir ]] || mkdir -p $logdir
2362   $do_stamp && arg_base+=$(date +%F.%T%z)
2363   script -t $arg_base.s 2> $arg_base.t
2364 }
2365 splay() { # script replay
2366   #logRoot="$HOME/typescripts/"
2367   #scriptreplay "$logRoot$1.t" "$logRoot$1.s"
2368   scriptreplay "$1.t" "$1.s"
2369 }
2370
2371 sr() {
2372   # sudo redo. be aware, this command may not work right on strange distros or earlier software
2373   if [[ $# == 0 ]]; then
2374     sudo -E bash -c -l "$(history -p '!!')"
2375   else
2376     echo this command redos last history item. no argument is accepted
2377   fi
2378 }
2379
2380 srm () {
2381   # with -ll, less secure but faster.
2382   command srm -ll "$@"
2383 }
2384
2385 srun() {
2386   scp $2 $1:/tmp
2387   ssh $1 /tmp/${2##*/} $(printf "%q\n" "${@:2}")
2388 }
2389
2390
2391 swap() {
2392   local tmp
2393   tmp=$(mktemp)
2394   mv $1 $tmp
2395   mv $2 $1
2396   mv $tmp $2
2397 }
2398
2399 tclock() { # terminal clock
2400   local x
2401   clear
2402   date +%l:%_M
2403   len=60
2404   # this goes to full width
2405   #len=${1:-$((COLUMNS -7))}
2406   x=1
2407   while true; do
2408     if (( x == len )); then
2409       end=true
2410       d="$(date +%l:%_M)   "
2411     else
2412       end=false
2413       d=$(date +%l:%M:%_S)
2414     fi
2415     echo -en "\r"
2416     echo -n "$d"
2417     for ((i=0; i<x; i++)); do
2418       if (( i % 6 )); then
2419         echo -n _
2420       else
2421         echo -n .
2422       fi
2423     done
2424     if $end; then
2425       echo
2426       x=1
2427     else
2428       x=$((x+1))
2429     fi
2430     sleep 5
2431   done
2432 }
2433
2434
2435 te() {
2436   # test existence / exists
2437   local ret=0
2438   for x in "$@"; do
2439     [[ -e "$x" || -L "$x" ]] || ret=1
2440   done
2441   return $ret
2442 }
2443
2444 psoff() {
2445   # normally, i would just execute these commands in the function.
2446   # however, DEBUG is not inherited, so we need to run it outside a function.
2447   # And we want to run set -x afterwards to avoid spam, so we cram everything
2448   # in here, and then it will run after this function is done.
2449   PROMPT_COMMAND='trap DEBUG; unset PROMPT_COMMAND; PS1="\w \$ "'
2450 }
2451 pson() {
2452   PROMPT_COMMAND=prompt-command
2453   if [[ $TERM == *(screen*|xterm*|rxvt*) ]]; then
2454     trap 'settitle "$BASH_COMMAND"' DEBUG
2455   fi
2456 }
2457
2458 # prometheus node curl
2459 pnodecurl() {
2460   local host
2461   host=${1:-127.0.0.1}
2462   s curl --cert-type PEM --cert /etc/prometheus/ssl/prometheus_cert.pem --key /etc/prometheus/ssl/prometheus_key.pem --cacert /etc/prometheus/ssl/prom_node_cert.pem --resolve prom_node:9100:$host -v https://prom_node:9100/metrics
2463 }
2464
2465 tx() { # toggle set -x, and the prompt so it doesnt spam
2466   if [[ $- == *x* ]]; then
2467     set +x
2468     pson
2469   else
2470     psoff
2471   fi
2472 }
2473
2474 psnetns() {
2475   # show all processes in the network namespace $1.
2476   # blank entries appear to be subprocesses/threads
2477   local x netns
2478   netns=$1
2479   ps -w | head -n 1
2480   sudo find -L /proc/[1-9]*/task/*/ns/net -samefile /run/netns/$netns | cut -d/ -f5 | \
2481     while read -r l; do
2482       x=$(ps -w --no-headers -p $l);
2483       if [[ $x ]]; then echo "$x"; else echo $l; fi;
2484     done
2485 }
2486 nonet() {
2487   if ! s ip netns list | grep -Fx nonet &>/dev/null; then
2488     s ip netns add nonet
2489   fi
2490   sudo -E env /sbin/ip netns exec nonet sudo -E -u iank /bin/bash
2491 }
2492
2493 m() { printf "%s\n" "$*";  "$@"; }
2494
2495 # update file. note: duplicated in mail-setup
2496 u() {
2497   local tmp tmpdir dest="$1"
2498   local base="${dest##*/}"
2499   local dir="${dest%/*}"
2500   if [[ $dir != "$base" ]]; then
2501     # dest has a directory component
2502     mkdir -p "$dir"
2503   fi
2504   ur=false # u result
2505   tmpdir=$(mktemp -d)
2506   cat >$tmpdir/"$base"
2507   tmp=$(rsync -ic $tmpdir/"$base" "$dest")
2508   if [[ $tmp ]]; then
2509     printf "%s\n" "$tmp"
2510     ur=true
2511     if [[ $dest == /etc/systemd/system/* ]]; then
2512       reload=true
2513     fi
2514   fi
2515   rm -rf $tmpdir
2516 }
2517
2518
2519 uptime() {
2520   if type -p uprecords &>/dev/null; then
2521     uprecords -B
2522   else
2523     command uptime
2524   fi
2525 }
2526
2527 virshrm() {
2528   for x in "$@"; do virsh destroy "$x"; virsh undefine "$x"; done
2529 }
2530
2531 vm-set-listen(){
2532   local t
2533   t=$(mktemp)
2534   local vm=$1
2535   local ip=$2
2536   sudo virsh dumpxml $vm | sed -r "s/(<listen.*address=')([^']+)/\1$ip/" | \
2537     sed -r "s/listen='[^']+/listen='$ip/"> $t
2538   sudo virsh undefine $vm
2539   sudo virsh define $t
2540 }
2541
2542
2543 vmshare() {
2544   vm-set-listen $1 0.0.0.0
2545 }
2546
2547
2548 vmunshare() {
2549   vm-set-listen $1 127.0.0.1
2550 }
2551
2552 myiwscan() {
2553   # find input, copy to pattern space, when we find the first field, print the copy in different order without newlines.
2554   # instead of using labels, we could just match a line and group, eg: /signal:/,{s/signal:(.*)/\1/h}
2555   sudo iw dev wls1 scan | sed -rn  "
2556 s/^\Wcapability: (.*)/\1/;Ta;h;b
2557 :a;s/^\Wsignal: -([^.]+).*/\1/;Tb;H;b
2558 # padded to min width of 20
2559 :b;s/\WSSID: (.*)/\1                    /;T;s/^(.{20}(.*[^ ])?) */\1/;H;g;s/(.*)\n(.*)\n(.*)/\2 \3  \1/gp;b
2560 "|sort -r
2561 }
2562
2563 # Run script by copying it to a temporary location first,
2564 # and changing directory, so we don't have any open
2565 # directories or files that could cause problems when
2566 # remounting.
2567 zr() {
2568   local tmp
2569   tmp=$(type -p "$1")
2570   if [[ $tmp ]]; then
2571     cd $(mktemp -d)
2572     cp -a "$tmp" .
2573     shift
2574     ./"${tmp##*/}" "$@"
2575   else
2576     "$@"
2577   fi
2578 }
2579
2580
2581 # * spark
2582 # spark 1 5 22 13 53
2583 #   # => ▁▁▃▂▇
2584
2585 # The MIT License
2586 # Copyright (c) Zach Holman, https://zachholman.com
2587 # https://github.com/holman/spark
2588
2589 # As of 2022-10-28, I reviewed github forks that had several newer
2590 # commits, none had anything interesting. I did a little refactoring
2591 # mostly to fix emacs indent bug.
2592
2593 # Generates sparklines.
2594 _spark_echo()
2595 {
2596   if [ "X$1" = "X-n" ]; then
2597     shift
2598     printf "%s" "$*"
2599   else
2600     printf "%s\n" "$*"
2601   fi
2602 }
2603
2604
2605 spark()
2606 {
2607   local f tc
2608   local n numbers=
2609
2610   # find min/max values
2611   local min=0xffffffff max=0
2612
2613   for n in ${@//,/ }
2614   do
2615     # on Linux (or with bash4) we could use `printf %.0f $n` here to
2616     # round the number but that doesn't work on OS X (bash3) nor does
2617     # `awk '{printf "%.0f",$1}' <<< $n` work, so just cut it off
2618     n=${n%.*}
2619     (( n < min )) && min=$n
2620     (( n > max )) && max=$n
2621     numbers=$numbers${numbers:+ }$n
2622   done
2623
2624   # print ticks
2625   local ticks=(▁ ▂ ▃ ▄ ▅ ▆ ▇ █)
2626
2627   # use a high tick if data is constant
2628   (( min == max )) && ticks=(▅ ▆)
2629
2630   tc=${#ticks[@]}
2631   f=$(( ( (max-min) <<8)/( tc - 1) ))
2632   (( f < 1 )) && f=1
2633
2634   for n in $numbers
2635   do
2636     _spark_echo -n ${ticks[$(( ((($n-$min)<<8)/$f) ))]}
2637   done
2638   _spark_echo
2639 }
2640
2641 pdfwc() { local f; for f; do echo "$f" $(pdfinfo "$f" | awk '/^Pages:/ {print $2}'); done }
2642
2643 # * misc stuff
2644
2645
2646 if $use_color && type -p tput &>/dev/null; then
2647   term_bold="$(tput bold)"
2648   term_red="$(tput setaf 1)"
2649   term_green="$(tput setaf 2)"
2650   term_yellow="$(tput setaf 3)"
2651   term_purple="$(tput setaf 5)"
2652   term_nocolor="$(tput sgr0)" # no font attributes
2653
2654   # unused so far. commented for shellcheck
2655   # term_underl="$(tput smul)"
2656   # term_blue="$(tput setaf 4)"
2657   # term_cyan="$(tput setaf 6)"
2658 fi
2659 # Try to keep environment pollution down, EPA loves us.
2660 unset safe_term match_lhs use_color
2661
2662 # * prompt
2663
2664
2665 if [[ $- == *i* ]]; then
2666
2667
2668   case $HOSTNAME in
2669     bk|je|li)
2670       if [[ $EUID == 1000 ]]; then
2671         system-status _ ||:
2672       fi
2673       ;;
2674   esac
2675
2676
2677   # this needs to come before next ps1 stuff
2678   # this stuff needs bash 4, feb 2009,
2679   # old enough to no longer condition on $BASH_VERSION anymore
2680   shopt -s autocd
2681   shopt -s dirspell
2682   PS1='\w'
2683   if [[ $- == *i* ]]  && [[ ! $LC_INSIDE_EMACS ]]; then
2684     PROMPT_DIRTRIM=2
2685     bind -m vi-command B:shell-backward-word
2686     bind -m vi-command W:shell-forward-word
2687   fi
2688
2689   if [[ $SSH_CLIENT || $SUDO_USER ]]; then
2690     unset PROMPT_DIRTRIM
2691     PS1="\h:$PS1"
2692   fi
2693
2694   # emacs terminal has problems if this runs slowly,
2695   # so I've thrown a bunch of things at the wall to speed it up.
2696   prompt-command() {
2697     local return=$? # this MUST COME FIRST
2698     local ps_char ps_color
2699     unset IFS
2700
2701     if [[ $HISTFILE ]]; then
2702       history -a # save history
2703     fi
2704
2705     case $return in
2706       0) ps_color="$term_purple"
2707          ps_char='\$'
2708          ;;
2709       *) ps_color="$term_green"
2710          ps_char="$return \\$"
2711          ;;
2712     esac
2713     if [[ ! -O . ]]; then # not owner
2714       if [[ -w . ]]; then # writable
2715         ps_color="$term_bold$term_red"
2716       else
2717         ps_color="$term_bold$term_green"
2718       fi
2719     fi
2720
2721     # faster than sourceing the file im guessing
2722     if [[ -e /dev/shm/iank-status && ! -e /tmp/quiet-status ]]; then
2723       eval $(< /dev/shm/iank-status)
2724     fi
2725     if [[ $MAIL_HOST && $MAIL_HOST != "$HOSTNAME" ]]; then
2726       ps_char="@ $ps_char"
2727     fi
2728     jobs_char=
2729     if [[ $(jobs -p) ]]; then
2730       jobs_char='j\j '
2731     fi
2732     # We could test if sudo is active with sudo -nv
2733     # but then we get an email and log of lots of failed sudo commands.
2734     # We could turn those off, but seems better not to.
2735     if [[ $EUID != 0 ]] && [[ $DID_SUDO ]]; then
2736       psudo="\[$term_bold$term_red\]s\[$term_nocolor\] "
2737     fi
2738     if [[ ! $HISTFILE ]]; then
2739       ps_char="NOHIST $ps_char"
2740     fi
2741     PS1="${PS1%"${PS1#*[wW]}"} $jobs_char$psudo\[$ps_color\]$ps_char\[$term_nocolor\] "
2742
2743     # set titlebar. instead, using more advanced
2744     # titelbar below
2745     #echo -ne "$_title_escape $HOSTNAME ${PWD/#$HOME/~}  \007"
2746   }
2747   PROMPT_COMMAND=prompt-command
2748
2749   if [[ $TERM == screen* ]]; then
2750     _title_escape="\033]..2;"
2751   else
2752     # somme sites recommend this, i dunno what the diff is.
2753     #_title_escape="\033]30;"
2754     _title_escape="\033]0;"
2755   fi
2756
2757   # make the titlebar be the last command and the current directory.
2758   settitle () {
2759
2760
2761     # These are some checks to help ensure we dont set the title at
2762     # times that the debug trap is running other than the case we
2763     # want. Some of them might not be needed.
2764     if (( ${#FUNCNAME[@]} != 1 || ${#BASH_ARGC[@]} != 2 || $BASH_SUBSHELL != 0 )); then
2765       return 0
2766     fi
2767     if [[ $1 == prompt-command ]]; then
2768       return 0
2769     fi
2770     echo -ne "$_title_escape ${PWD/#$HOME/~} "
2771     printf "%s" "$*"
2772     echo -ne "\007"
2773   }
2774
2775   # note, this wont work:
2776   # x=$(mktemp); cp a $x
2777   # I havnt figured out why, bigger fish to fry.
2778   #
2779   # for titlebar.
2780   # condition from the screen man page i think.
2781   # note: duplicated in tx()
2782   if [[ $TERM == *(screen*|xterm*|rxvt*) ]]; then
2783     trap 'settitle "$BASH_COMMAND"' DEBUG
2784   else
2785     trap DEBUG
2786   fi
2787
2788 fi
2789
2790 # * stuff that makes sense to be at the end
2791
2792
2793 # best practice
2794 unset IFS
2795
2796 # shellcheck disable=SC1090
2797 [[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session *as a function*
2798
2799 # I had this idea to start a bash shell which would run an initial
2800 # command passed through this env variable, then continue on
2801 # interactively. But the use case I had in mind went away.
2802 #
2803 # if [[ $MY_INIT_CMD ]]; then
2804 #   "${MY_INIT_CMD[@]}"
2805 #   unset MY_INIT_CMD
2806 # fi
2807
2808 # ensure no bad programs appending to this file will have an affect
2809 return 0