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 ## Program choice
  29 pick_program () {
  30   local what=$1; shift
  31   local choice=false
  32   for i in "$@"; do
  33     if type -t >/dev/null "$i"; then choice=$i; break; fi
  34   done
  35   info "pick $what = $choice"
  36   echo "$choice"
  37 }
  38
  39 ###--------------------------------------------------------------------------
  40 ### Parse arguments.
  41
  42 vnc=no
  43 atomtag=
  44 start=yes
  45 wait=yes
  46
  47 for opt; do
  48   case "$opt" in
  49     help)
  50       cat <<EOF
  51 Options:
  52   tag=TAG
  53   [no]trace
  54   [no]info
  55   [no]run
  56   [no]start
  57   [no]wait
  58   [no]vnc
  59 EOF
  60       exit
  61       ;;
  62
  63     tag=*) atomtag=/${opt#tag=} ;;
  64     trace) set -x ;;
  65     notrace) set +x ;;
  66     info | run | start | wait | vnc) eval "$opt=yes" ;;
  67     noinfo | norun | nostart | nowait | novnc) eval "${opt#no}=no" ;;
  68
  69     *) echo "unknown option $opt" >&2; exit 1 ;;
  70   esac
  71 done
  72
  73 ###--------------------------------------------------------------------------
  74 ### Iniitial settings.
  75
  76 ## Assume X sessions are secure.
  77 export __mdw_sechost="`hostname`"
  78
  79 ## Obtain the screen dimensions.
  80 case ",$XWIDTH,$XHEIGHT," in
  81   *,,*) eval $(xscsize -bx) ;;
  82 esac
  83 info "screen size = $XWIDTH x $XHEIGHT"
  84
  85 initialize () {
  86   ## Load the X resource database.
  87   run init xrdb -override $HOME/.Xdefaults
  88
  89   ## Random xsettery.
  90   run init xset b 5 2000 50
  91   run init xset r rate 500 50
  92   run init xset m 2 1
  93
  94   ## Key mappings.
  95   xmodmap -e 'keysym BackSpace = BackSpace BackSpace'
  96 }
  97
  98 ###--------------------------------------------------------------------------
  99 ### Start a window manager.
 100
 101 wm=$(pick_program window-manager enlightenment e16 twm)
 102 wmopts=""
 103 case "$wm,$vnc" in
 104   enlightenment,yes | e16,yes)
 105     wmopts="$eopts -econfdir $HOME/.enlightenment-vnc"
 106     ;;
 107 esac
 108
 109 start-e16 () {
 110   run bginit $wm $wmopts
 111   win=nil
 112   for i in $(seq 10); do
 113     sleep 1
 114     if eesh version >/dev/null 2>&1; then
 115       win=t
 116       break
 117     fi
 118   done
 119   case $win in
 120     t)
 121       info "$wm started ok"
 122       run init xsetroot -cursor_name left_ptr
 123       ;;
 124     nil)
 125       info "$wm failed to start!"
 126       ;;
 127   esac
 128 }
 129
 130 start-window-manager () {
 131   case $(type -t start-$wm || echo "not-found") in
 132     function)
 133       start-$wm $wmopts
 134       ;;
 135     *)
 136       run bginit $wm $wmopts
 137       ;;
 138   esac
 139 }
 140
 141 ###--------------------------------------------------------------------------
 142 ### Random useful clients.
 143
 144 start-clients-local () { :; }
 145
 146 start-clients () {
 147
 148   ## Gnome session.
 149   case "$vnc,$(gnome-session --version 2>&1)" in
 150     no,gnome-session\ 2.3[2-9].* | \
 151     no,gnome-session\ 2.4[0-9].* | \
 152     no,gnome-session\ 2.[1-9][0-9][0-9]*)
 153       run bginit gnome-session --session mdw
 154       ;;
 155     no,*)
 156       run bginit gnome-session
 157       ;;
 158   esac
 159
 160   ## Local clients.
 161   start-clients-local
 162 }
 163
 164 ###--------------------------------------------------------------------------
 165 ### Main screen layout.
 166
 167 ## Choose appropriate clients.
 168 emacs=$(pick_program emacs emacs23 emacs22 emacs21 emacs)
 169 term=$(pick_program terminal pterm Eterm xterm)
 170
 171 ## Emacs window measurements.
 172 case "$emacs" in
 173   emacs21 | emacs)
 174     e_colwd=492 e_hextra=34
 175     e_colchars=82 e_cextra=-2
 176     e_lineht=13 e_vextra=52
 177     ;;
 178   emacs22 | emacs23)
 179     e_colwd=492 e_hextra=8
 180     e_colchars=82 e_cextra=-6
 181     e_lineht=13 e_vextra=46
 182     ;;
 183 esac
 184
 185 ## Terminal window measurements.
 186 case "$term" in
 187   pterm) t_wd=504 t_lineht=13 t_vextra=23 geom=-geometry;;
 188   Eterm) t_wd=504 t_lineht=13 t_vextra=23 geom=-g;;
 189   xterm) t_wd=507 t_lineht=13 t_vextra=27 geom=-geometry;;
 190 esac
 191
 192 ## GNOME stuff measurements.
 193 declare -i xbound="XWIDTH - 113"
 194
 195 ## Choose a width for Emacs.
 196 ##
 197 ## We'd like it to be as wide as possible, allowing for a column of xterms
 198 ## down the right hand side.  However, I'd prefer a double-width Emacs to a
 199 ## single-width Emacs and xterms.  If it's not going to work at all, a single
 200 ## Emacs column will have to do.  Also, there's a strange thing with Emacs21
 201 ## and the toolbar, so we add on some rows which are later mysteriously
 202 ## subtracted.
 203
 204 declare -i ecols="(xbound - t_wd - e_hextra)/e_colwd"
 205 if (( ecols < 2 && xbound > e_colwd * 2 + e_hextra )); then
 206   ecols=2
 207 elif (( ecols < 1 )); then
 208   ecols=1
 209 fi
 210
 211 declare -i \
 212   emacsx="ecols * e_colchars + e_cextra" \
 213   emacsy="(XHEIGHT - e_vextra)/e_lineht"
 214
 215 start-emacs () {
 216   GDK_NATIVE_WINDOWS=1 run bgclients noip \
 217     $emacs -geometry ${emacsx}x${emacsy}+0+0
 218 }
 219
 220 ## Now place some xterms.
 221 ##
 222 ## A few smaller xterms are in general better than one great big one.  35
 223 ## lines is a good height for most terminals.  25 lines is a minimum.  The
 224 ## strategy for doling out xterms into a column is to make as many 35-liners
 225 ## as we can, until the remaining space would be too small for a 25-liner.
 226 ## If we can get two 25s out of that then we do (largest first); otherwise
 227 ## just make one big one.  We stop at the end of a page, once we've made
 228 ## three xterms.
 229
 230 start-xterms () {
 231
 232   ## Initialize some parameters.
 233   declare -i x="ecols * e_colwd + e_hextra" xb=xbound
 234   declare -i n=0 pgx=0 l h y ht
 235   declare -i hstd="35 * t_lineht + t_vextra" hmin="25 * t_lineht + t_vextra"
 236
 237   ## Do the placement.
 238   while :; do
 239
 240     ## Start a new iteration.
 241     if ((x + t_wd > xb)); then
 242       if ((n >= 3)); then break; fi
 243       x="pgx + XWIDTH" pgx="pgx + XWIDTH" xb="xb + XWIDTH"
 244     fi
 245
 246     ## Make large xterms.
 247     y=0 ht=XHEIGHT
 248     while ((ht - hstd >= hmin)); do
 249       run bgclients $term $geom 80x35+$x+$y
 250       y="y + hstd" ht="ht - hstd" n="n + 1"
 251     done
 252
 253     ## Fill the remaining space.
 254     if ((ht >= 2 * hmin)); then h="ht - hmin"; else h=ht; fi
 255     l="(h - t_vextra)/t_lineht" h="l * t_lineht + t_vextra"
 256     run bgclients $term $geom 80x$l+$x+$y
 257     y="y + h" ht="ht - h" n="n + 1"
 258     if ((ht >= hmin)); then
 259       run bgclients $term $geom 80x25+$x+$y
 260       n="n + 1"
 261     fi
 262     x="x + t_wd"
 263   done
 264 }
 265
 266 ###--------------------------------------------------------------------------
 267 ### Requesters.
 268
 269 req () {
 270   declare title=$1 hist=$2; shift 2
 271   cmd=$(xgetline -t "$title" -p "_Command:" -Hl "$HOME/$hist") &&
 272   exec "$@" "$cmd"
 273 }
 274
 275 ###--------------------------------------------------------------------------
 276 ### Final waiting.
 277
 278 atom=XINIT_COMMAND$atomtag
 279
 280 xwait () {
 281   while :; do
 282     xatom delete $atom
 283     info "waiting on $atom"
 284     line=$(xatom wait $atom)
 285     info "xatom: $line"
 286
 287     case "$line" in
 288       :help)
 289         xmsg -I -t "xinitrc help" -d "xinitrc commands" - <<EOF &
 290 :help
 291 :emacs :xterms :window-manager :clients
 292 :ask-run :ask-command
 293 :init
 294 :terminal
 295 ! SHELL-COMMAND
 296 CLIENT
 297 EOF
 298         ;;
 299       :emacs | :xterms | :window-manager | :clients)
 300         start-${line#:}
 301         ;;
 302       :terminal)
 303         run bgclients $term
 304         ;;
 305       :init)
 306         initialize
 307         ;;
 308       :exec)
 309         info "restarting xinitrc"
 310         exec "$0" wait nostart
 311         ;;
 312       :ask-run)
 313         req "Shell command" .cmd.hist xcatch -FMiscFixed6x13 -- sh -c&
 314         ;;
 315       :ask-command)
 316         req "xinit command" .xinit.hist xatom set XINIT_COMMAND$atomtag&
 317         ;;
 318       :*)
 319         xmsg -E -t "xinitrc error" "Unknown command \`$line'" &
 320         ;;
 321       !*)
 322         eval "${line#!}"
 323         ;;
 324       *)
 325         set -- $line
 326         run bgclients "$@"
 327         ;;
 328     esac
 329   done
 330 }
 331
 332 ###--------------------------------------------------------------------------
 333 ### Actually start things up.
 334
 335 if [ -f $HOME/.xinitrc-local ]; then
 336   . $HOME/.xinitrc-local
 337 fi
 338
 339 case "$start" in
 340   yes)
 341     info "starting standard clients"
 342     initialize
 343     start-window-manager
 344     start-clients
 345     start-emacs
 346     start-xterms
 347     ;;
 348   no)
 349     info "not starting standard clients"
 350     ;;
 351 esac
 352
 353 case "$wait" in
 354   yes)
 355     xwait
 356     ;;
 357   no)
 358     info "not waiting before exit"
 359     ;;
 360 esac
 361
 362 ###----- That's all, folks --------------------------------------------------