mdw@git.distorted.org.uk Git - profile/blob - dot/xinitrc

   1 #! /bin/bash
   2 ###
   3 ### X startup script
   4
   5 ###--------------------------------------------------------------------------
   6 ### Utility functions.
   7
   8 ## Progress indicators.
   9 info=yes
  10 info () {
  11   case $info in yes) echo "- $*" >&2 ;; esac
  12 }
  13
  14 run=yes
  15 run () {
  16   local what=$1; shift
  17   local bg=no
  18
  19   case $what in bg*) bg=yes what=${what#bg} ;; esac
  20   info "run $what: $*"
  21
  22   case "$run,$bg" in
  23     yes,no) "$@" ;;
  24     yes,yes) "$@" & ;;
  25   esac
  26 }
  27
  28 manage () {
  29   local when=$(date +%s) now
  30   local fail=0 rc report
  31
  32   while :; do
  33     "$@"; rc=$?
  34     case $rc in
  35       0) info "manage $1: successful exit"; break ;;
  36       143) info "manage $1: terminated"; break ;;
  37     esac
  38     now=$(date +%s)
  39     report="rc = $rc"
  40     if (( $now - $when > 5 )); then
  41       fail=0
  42     else
  43       report="$report, early failure"
  44       fail=$(( $fail + 1 ))
  45       if (( $fail >= 5 )); then
  46         info "manage $1: exit ($report), giving up after $fail failures"
  47         break
  48       fi
  49     fi
  50     info "manage $1: exit ($report), restarting"
  51     when=$now
  52   done
  53 }
  54
  55 ## Program choice
  56 pick_program () {
  57   local what=$1; shift
  58   local choice=false
  59   for i in "$@"; do
  60     if type -t >/dev/null "$i"; then choice=$i; break; fi
  61   done
  62   info "pick $what = $choice"
  63   echo "$choice"
  64 }
  65
  66 ###--------------------------------------------------------------------------
  67 ### Parse arguments.
  68
  69 vnc=no
  70 atomtag=
  71 start=yes
  72 wait=yes
  73
  74 for opt; do
  75   case "$opt" in
  76     help)
  77       cat <<EOF
  78 Options:
  79   tag=TAG
  80   [no]trace
  81   [no]info
  82   [no]run
  83   [no]start
  84   [no]wait
  85   [no]vnc
  86 EOF
  87       exit
  88       ;;
  89
  90     tag=*) atomtag=/${opt#tag=} ;;
  91     trace) set -x ;;
  92     notrace) set +x ;;
  93     info | run | start | wait | vnc) eval "$opt=yes" ;;
  94     noinfo | norun | nostart | nowait | novnc) eval "${opt#no}=no" ;;
  95
  96     *) echo "unknown option $opt" >&2; exit 1 ;;
  97   esac
  98 done
  99
 100 ###--------------------------------------------------------------------------
 101 ### Preliminary hook.
 102
 103 if [ -r $HOME/.xinitrc-prehook ]; then
 104   . $HOME/.xinitrc-prehook
 105 fi
 106
 107 ###--------------------------------------------------------------------------
 108 ### Iniitial settings.
 109
 110 ## Assume X sessions are secure.
 111 export __mdw_sechost="$(hostname)"
 112
 113 ## Tell things that XFCE is in charge.  This is the most desktoppy thing that
 114 ## I run, so it's not entirely wrong.
 115 : ${XDG_CURRENT_DESKTOP=XFCE}; export XDG_CURRENT_DESKTOP
 116
 117 ## Obtain the screen dimensions.
 118 case ",$XWIDTH,$XHEIGHT," in
 119   *,,*) eval $(xscsize -bx; xscsize -bmx) ;;
 120 esac
 121 case ",$XNSCR," in
 122   ,,)
 123     XNSCR=1 XSCR0_X=0 XSCR0_Y=0 XSCR0_WIDTH=$XWIDTH XSCR0_HEIGHT=$XHEIGHT
 124     ;;
 125 esac
 126 i=0; while (( i < XNSCR )); do
 127   eval "x=\$XSCR${i}_X y=\$XSCR${i}_Y
 128         wd=\$XSCR${i}_WIDTH ht=\$XSCR${i}_HEIGHT"
 129   info "screen #$i = ${wd}x${ht}+${x}+${y}"
 130   i=$(( i + 1 ))
 131 done
 132
 133 initialize () {
 134   ## Load the X resource database.
 135   run init xrdb -override $HOME/.Xdefaults
 136
 137   ## Random xsettery.
 138   run init xset b 5 2000 50
 139   run init xset r rate 500 50
 140   run init xset m 2 1
 141
 142   ## Key mappings.
 143   xmodmap $HOME/.xmodmap
 144   if [ -r $HOME/.xmodmap-local ]; then
 145     xmodmap $HOME/.xmodmap-local
 146   fi
 147 }
 148
 149 ###--------------------------------------------------------------------------
 150 ### Start a window manager.
 151
 152 wm=$(pick_program window-manager e16 compiz enlightenment e17 twm)
 153 wmopts=""
 154 case "$wm,$vnc" in
 155   enlightenment,yes | e16,yes)
 156     wmopts="$eopts -econfdir $HOME/.enlightenment-vnc"
 157     ;;
 158 esac
 159
 160 start-e16 () {
 161   run bginit manage $wm $wmopts
 162   win=nil
 163   for i in $(seq 10); do
 164     sleep 1
 165     if eesh version >/dev/null 2>&1; then
 166       win=t
 167       break
 168     fi
 169   done
 170   case $win in
 171     t)
 172       info "$wm started ok"
 173       run init xsetroot -cursor_name left_ptr
 174       ;;
 175     nil)
 176       info "$wm failed to start!"
 177       ;;
 178   esac
 179 }
 180
 181 start-window-manager () {
 182   case $(type -t start-$wm || echo "not-found") in
 183     function)
 184       start-$wm $wmopts
 185       ;;
 186     *)
 187       run bginit manage $wm $wmopts
 188       ;;
 189   esac
 190 }
 191
 192 ###--------------------------------------------------------------------------
 193 ### Random useful clients.
 194
 195 start-clients-local () { :; }
 196
 197 start-clients () {
 198
 199   ## Gnome session.
 200   case "$vnc,$(xfce4-session --version 2>&1),$(gnome-session --version 2>&1)"
 201   in
 202     no,xfce4-session*)
 203       run bginit xfce4-session
 204       ;;
 205     no,*,gnome-session\ 2.3[2-9].* | \
 206     no,*,gnome-session\ 2.4[0-9].* | \
 207     no,*,gnome-session\ 2.[1-9][0-9][0-9]*)
 208       run bginit gnome-session --session mdw
 209       ;;
 210     no,*,gnome-session*)
 211       run bginit gnome-session
 212       ;;
 213   esac
 214
 215   ## Local clients.
 216   start-clients-local
 217 }
 218
 219 ###--------------------------------------------------------------------------
 220 ### Main screen layout.
 221
 222 ## Choose appropriate clients.
 223 emacs=$(pick_program emacs \
 224   emacs24-lucid emacs23-lucid emacs24 emacs23 emacs22 emacs21 \
 225   emacs-lucid emacs)
 226 term=$(pick_program terminal pterm Eterm xterm)
 227
 228 ## If we fell back to an unversioned Emacs binary, then figure out what
 229 ## version it actually is.
 230 case $emacs in
 231   emacs | emacs-lucid)
 232     set -- $($emacs --version | head -n1)
 233     e_ver=emacs${3%%.*}${emacs#emacs}
 234     ;;
 235   *)
 236     e_ver=$emacs
 237     ;;
 238 esac
 239 info emacs-version = $e_ver
 240
 241 ## Emacs window measurements.
 242 ##
 243 ## e_colsz = width of a column in characters (from `emacs-width' metaconfig)
 244 ## e_charwd = width of a character in pixels (assume `6x13')
 245 ## e_colextra = additional per-column overhead in pixels
 246 ## e_colextrachars = additional per-column overhead in character units
 247 ## e_colwd = basic width of a column in pixels
 248 ## e_hextra = extra horizontal width in pixels
 249 ##      Width of an N-column Emacs frame in pixels will be
 250 ##      N*e_colwd + e_hextra
 251 ## e_colchars = width of a column in Emacs `-geometry' units
 252 ## e_cextra = extra horizontal width in Emacs `-geometry' units
 253 ##      So an N-column frame should be reported to Emacs as being
 254 ##      N*e_colchars + e_cextra geometry units wide
 255 ## e_lineht = height of a character line in pixels
 256 ## e_vextra = number of additional vertical cruft pixels
 257 ##      So an N-line Emacs frame takes N*e_lineht + e_vextra pixels
 258 e_colsz=$(mdw-conf emacs-width 77) e_charwd=6
 259 e_colextra=30 e_colextrachars=5 e_lineht=13
 260 case "$e_ver" in
 261   emacs21 | emacs) e_hextra=34 e_cextra=-2 e_vextra=52 ;;
 262   emacs22 | emacs23) e_hextra=8 e_cextra=-6 e_vextra=46 ;;
 263   emacs24) e_hextra=5 e_cextra=-6 e_vextra=42 ;;
 264   emacs23-lucid) e_hextra=7 e_cextra=-6 e_vextra=48 ;;
 265   emacs24-lucid) e_hextra=7 e_cextra=-5 e_vextra=48 ;;
 266   emacs26-lucid) e_hextra=5 e_cextra=-6 e_vextra=51 ;;
 267 esac
 268 e_colwd=$(( e_colsz*e_charwd + e_colextra ))
 269 e_colchars=$(( e_colsz + e_colextrachars ))
 270
 271 ## Terminal window measurements.
 272 ##
 273 ## t_wd = the window width, in pixels
 274 ## t_lineht, t_vextra = height parameters: if the window is N lines high,
 275 ##      then it will be N*t_lineht + t_vextra pixels high
 276 case "$term" in
 277   pterm)
 278     ## The pterm width differs according to whether it's linked against Gtk 2
 279     ## or 3.  Let's find out...
 280     case $(ldd $(command -v pterm) | grep libgtk) in
 281       *libgtk-2* | *libgtk-x11-2*) t_wd=504 ;;
 282       *) t_wd=503 ;;
 283     esac
 284    t_lineht=13 t_vextra=23 geom=-geometry;;
 285   Eterm) t_wd=504 t_lineht=13 t_vextra=23 geom=-g;;
 286   xterm) t_wd=507 t_lineht=13 t_vextra=27 geom=-geometry;;
 287 esac
 288
 289 ## GNOME stuff measurements.
 290 declare -i panelwd=64 xbound=$(( XWIDTH - panelwd ))
 291
 292 ## Choose a width for Emacs.
 293 ##
 294 ## We're going to make a single frame of Emacs, which will be automatically
 295 ## divvied into columns; the rest of the space will be tiled with xterms.  If
 296 ## we have multiple screens, then Emacs can have the first screen and we'll
 297 ## fill the rest with terminals.  Otherwise, we'll try to have N columns of
 298 ## Emacs, and N - 1 columns of xterms; if that doesn't work, we'll make do
 299 ## with N - 2 columns of xterms.
 300 ##
 301 ## So, let W be the available width; let E and T be the widths of an Emacs
 302 ## column (e_colwd) and terminal (t_wd), respectively, and let E0 be the
 303 ## additive width of Emacs's existence (e_hextra).  If we have more than one
 304 ## screen, then instead, let T be zero.  To start out, then, we let N = 1 +
 305 ## floor((W - E - E0)/(E + T)).  If W - E0 - (N + 1) E - (N - 1)*T >= 0, then
 306 ## we increase N by one.
 307 declare -i lim=XSCR0_WIDTH
 308 if (( lim > xbound )); then lim=xbound; fi
 309 declare -i twd=t_wd; if (( XNSCR > 1 )); then twd=0; fi
 310 declare -i ecols=$(( (lim - e_colwd - e_hextra)/(e_colwd + twd) + 1 ))
 311 if (( lim - e_hextra - (ecols + 1)*e_colwd - (ecols - 1)*twd >= 0 )); then
 312   ecols=$(( ecols + 1 ))
 313 fi
 314
 315 declare -i \
 316   emacsx=$(( ecols*e_colchars + e_cextra )) \
 317   emacsy=$(( (XHEIGHT - e_vextra)/e_lineht ))
 318
 319 start-emacs () {
 320   GDK_NATIVE_WINDOWS=1 run bgclients noip \
 321     $emacs -bg black -geometry ${emacsx}x${emacsy}+${XSCR0_X}+${XSCR0_Y} \
 322     --mdw-splashy-startup
 323 }
 324
 325 ## Now place some xterms.
 326 ##
 327 ## A few smaller xterms are in general better than one great big one.  35
 328 ## lines is a good height for most terminals.  25 lines is a minimum.  The
 329 ## strategy for doling out xterms into a column is to make as many 35-liners
 330 ## as we can, until the remaining space would be too small for a 25-liner.
 331 ## If we can get two 25s out of that then we do (largest first); otherwise
 332 ## just make one big one.  We stop at the end of a page, once we've made
 333 ## three xterms.
 334
 335 start-xterms () {
 336
 337   ## Initialize some parameters.
 338   declare -i x=$(( ecols*e_colwd + e_hextra + XSCR0_X )) xb=xbound
 339   declare -i n=0 pgx=0 l h y ht scr=0 ll=lim
 340   declare -i hstd=$(( 35*t_lineht + t_vextra ))
 341   declare -i hmin=$(( 25*t_lineht + t_vextra ))
 342   declare -i scrx scry scrwd scrht
 343
 344   eval "scrx=\$XSCR${scr}_X scry=\$XSCR${scr}_Y
 345         scrwd=\$XSCR${scr}_WIDTH scrht=\$XSCR${scr}_HEIGHT"
 346
 347   ## Do the placement.
 348   while :; do
 349
 350     ## Start a new iteration.
 351     if (( x + t_wd > ll )); then
 352       scr=$(( scr + 1 ))
 353       if (( scr >= XNSCR )); then
 354         if (( n >= 3 )); then break; fi
 355         pgx=$(( pgx + XWIDTH )) xb=$(( xb + XWIDTH ))
 356         scr=0
 357       fi
 358       eval "scrx=\$XSCR${scr}_X scry=\$XSCR${scr}_Y
 359             scrwd=\$XSCR${scr}_WIDTH scrht=\$XSCR${scr}_HEIGHT"
 360       x=$(( pgx + scrx ))
 361       ll=$(( x + scrwd ))
 362       if (( ll > xb )); then ll=xb; fi
 363     fi
 364
 365     ## Make large xterms.
 366     y=scry ht=scrht
 367     while (( ht - hstd >= hmin )); do
 368       run bgclients $term $geom 80x35+$x+$y
 369       y=$(( y + hstd )) ht=$(( ht - hstd )) n=$(( n + 1 ))
 370     done
 371
 372     ## Fill the remaining space.
 373     if (( ht >= 2*hmin )); then h=$(( ht - hmin )); else h=ht; fi
 374     l=$(( (h - t_vextra)/t_lineht )) h=$(( l*t_lineht + t_vextra ))
 375     run bgclients $term $geom 80x$l+$x+$y
 376     y=$(( y + h )) ht=$(( ht - h )) n=$(( n + 1 ))
 377     if ((ht >= hmin)); then
 378       run bgclients $term $geom 80x25+$x+$y
 379       n=$(( n + 1 ))
 380     fi
 381     x=$(( x + t_wd ))
 382   done
 383 }
 384
 385 ###--------------------------------------------------------------------------
 386 ### Requesters.
 387
 388 req () {
 389   declare title=$1 hist=$2; shift 2
 390   cmd=$(xgetline -t "$title" -p "_Command:" -Hl "$HOME/$hist") &&
 391   exec "$@" "$cmd"
 392 }
 393
 394 ###--------------------------------------------------------------------------
 395 ### Final waiting.
 396
 397 atom=XINIT_COMMAND$atomtag
 398
 399 xwait () {
 400   while :; do
 401     xatom delete $atom
 402     info "waiting on $atom"
 403     line=$(xatom wait $atom)
 404     info "xatom: $line"
 405
 406     case "$line" in
 407       :help)
 408         xmsg -I -t "xinitrc help" -d "xinitrc commands" - <<EOF &
 409 :help
 410 :emacs :xterms :window-manager :clients
 411 :ask-run :ask-command
 412 :init
 413 :terminal
 414 ! SHELL-COMMAND
 415 CLIENT
 416 EOF
 417         ;;
 418       :emacs | :xterms | :window-manager | :clients)
 419         start-${line#:}
 420         ;;
 421       :terminal)
 422         run bgclients $term
 423         ;;
 424       :init)
 425         initialize
 426         ;;
 427       :exec)
 428         info "restarting xinitrc"
 429         exec "$0" wait nostart
 430         ;;
 431       :ask-run)
 432         req "Shell command" .cmd.hist xcatch -F"Fixed 13" -- sh -c&
 433         ;;
 434       :ask-command)
 435         req "xinit command" .xinit.hist xatom set XINIT_COMMAND$atomtag&
 436         ;;
 437       :*)
 438         xmsg -E -t "xinitrc error" "Unknown command \`$line'" &
 439         ;;
 440       !*)
 441         eval "${line#!}"
 442         ;;
 443       *)
 444         eval "set -- $line"
 445         run bgclients "$@"
 446         ;;
 447     esac
 448   done
 449 }
 450
 451 ###--------------------------------------------------------------------------
 452 ### Gnome session care and feeding.
 453
 454 session-running-p () {
 455   dbus-send --session --print-reply --dest=org.freedesktop.DBus / \
 456     org.freedesktop.DBus.GetNameOwner string:org.gnome.SessionManager \
 457     >/dev/null 2>&1
 458 }
 459
 460 dbus-service-running-p () {
 461   dbus-send >/dev/null 2>&1 --session --print-reply \
 462     --dest=org.freedesktop.DBus / \
 463     org.freedesktop.DBus.GetNameOwner string:$1
 464 }
 465
 466 kill-gnome-session () {
 467   win=nil
 468   while read service object logout; do
 469     if dbus-service-running-p $service; then win=t; break; fi
 470   done <<EOF
 471 org.xfce.SessionManager /org/xfce/SessionManager org.xfce.Session.Manager.Shutdown uint32:1 boolean:false
 472 org.gnome.SessionManager /org/gnome/SessionManager org.gnome.SessionManager.Logout uint32:2
 473 EOF
 474   case $win in nil) return ;; esac
 475   info "killing session manager"
 476   dbus-send --session --dest=$service $object $logout
 477   for i in 1 2 3 4 5; do
 478     sleep 1
 479     if ! dbus-service-running-p $service; then break; fi
 480   done
 481 }
 482
 483 ###--------------------------------------------------------------------------
 484 ### Actually start things up.
 485
 486 if [ -f $HOME/.xinitrc-local ]; then
 487   . $HOME/.xinitrc-local
 488 fi
 489
 490 case "$start" in
 491   yes)
 492     info "starting standard clients"
 493     initialize
 494     start-window-manager
 495     start-clients
 496     start-emacs
 497     start-xterms
 498     ;;
 499   no)
 500     info "not starting standard clients"
 501     ;;
 502 esac
 503
 504 case "$wait" in
 505   yes)
 506     xwait
 507     kill-gnome-session
 508     ;;
 509   no)
 510     info "not waiting before exit"
 511     ;;
 512 esac
 513
 514 ###----- That's all, folks --------------------------------------------------