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