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 10 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   ## Gnome settings.
  98   case $vnc in no) run bginit gnome-settings-daemon ;; esac
  99 }
 100
 101 ###--------------------------------------------------------------------------
 102 ### Start a window manager.
 103
 104 wm=$(pick_program window-manager enlightenment e16 twm)
 105 wmopts=""
 106 case "$wm,$vnc" in
 107   enlightenment,yes | e16,yes)
 108     wmopts="$eopts -econfdir $HOME/.enlightenment-vnc"
 109     ;;
 110 esac
 111
 112 start-window-manager () {
 113   run bginit $wm $wmopts
 114 }
 115
 116 ###--------------------------------------------------------------------------
 117 ### Random useful clients.
 118
 119 start-clients-local () { :; }
 120
 121 start-clients () {
 122   ## Mail notification.
 123   run bginit mail-notification
 124
 125   ## System monitor.
 126   case $vnc in no) run bginit gkrellm ;; esac
 127
 128   ## Screensaver.
 129   case $vnc in
 130     no)
 131       run init xscreensaver-command -exit
 132       run bginit xscreensaver -no-splash
 133       ;;
 134   esac
 135
 136   ## Panel.
 137   case $vnc in no) run bginit gnome-panel ;; esac
 138
 139   ## System tray.
 140   run bginit stalonetray
 141
 142   ## Local clients.
 143   start-clients-local
 144 }
 145
 146 ###--------------------------------------------------------------------------
 147 ### Main screen layout.
 148
 149 ## Choose appropriate clients.
 150 emacs=$(pick_program emacs emacs23 emacs22 emacs21 emacs)
 151 term=$(pick_program terminal pterm Eterm xterm)
 152
 153 ## Emacs window measurements.
 154 case "$emacs" in
 155   emacs21 | emacs)
 156     e_colwd=492 e_hextra=34
 157     e_colchars=82 e_cextra=-2
 158     e_lineht=13 e_vextra=52
 159     ;;
 160   emacs22 | emacs23)
 161     e_colwd=492 e_hextra=8
 162     e_colchars=82 e_cextra=-6
 163     e_lineht=13 e_vextra=46
 164     ;;
 165 esac
 166
 167 ## Terminal window measurements.
 168 case "$term" in
 169   pterm) t_wd=504 t_lineht=13 t_vextra=23 geom=-geometry;;
 170   Eterm) t_wd=504 t_lineht=13 t_vextra=23 geom=-g;;
 171   xterm) t_wd=507 t_lineht=13 t_vextra=27 geom=-geometry;;
 172 esac
 173
 174 ## GNOME stuff measurements.
 175 declare -i xbound="XWIDTH - 113"
 176
 177 ## Choose a width for Emacs.
 178 ##
 179 ## We'd like it to be as wide as possible, allowing for a column of xterms
 180 ## down the right hand side.  However, I'd prefer a double-width Emacs to a
 181 ## single-width Emacs and xterms.  If it's not going to work at all, a single
 182 ## Emacs column will have to do.  Also, there's a strange thing with Emacs21
 183 ## and the toolbar, so we add on some rows which are later mysteriously
 184 ## subtracted.
 185
 186 declare -i ecols="(xbound - t_wd - e_hextra)/e_colwd"
 187 if (( ecols < 2 && xbound > e_colwd * 2 + e_hextra )); then
 188   ecols=2
 189 elif (( ecols < 1 )); then
 190   ecols=1
 191 fi
 192
 193 declare -i \
 194   emacsx="ecols * e_colchars + e_cextra" \
 195   emacsy="(XHEIGHT - e_vextra)/e_lineht"
 196
 197 start-emacs () {
 198   run bgclients noip $emacs -geometry ${emacsx}x${emacsy}+0+0
 199 }
 200
 201 ## Now place some xterms.
 202 ##
 203 ## A few smaller xterms are in general better than one great big one.  35
 204 ## lines is a good height for most terminals.  25 lines is a minimum.  The
 205 ## strategy for doling out xterms into a column is to make as many 35-liners
 206 ## as we can, until the remaining space would be too small for a 25-liner.
 207 ## If we can get two 25s out of that then we do (largest first); otherwise
 208 ## just make one big one.  We stop at the end of a page, once we've made
 209 ## three xterms.
 210
 211 start-xterms () {
 212
 213   ## Initialize some parameters.
 214   declare -i x="ecols * e_colwd + e_hextra" xb=xbound
 215   declare -i n=0 pgx=0 l h y ht
 216   declare -i hstd="35 * t_lineht + t_vextra" hmin="25 * t_lineht + t_vextra"
 217
 218   ## Do the placement.
 219   while :; do
 220
 221     ## Start a new iteration.
 222     if ((x + t_wd > xb)); then
 223       if ((n >= 3)); then break; fi
 224       x="pgx + XWIDTH" pgx="pgx + XWIDTH" xb="xb + XWIDTH"
 225     fi
 226
 227     ## Make large xterms.
 228     y=0 ht=XHEIGHT
 229     while ((ht - hstd >= hmin)); do
 230       run bgclients $term $geom 80x35+$x+$y
 231       y="y + hstd" ht="ht - hstd" n="n + 1"
 232     done
 233
 234     ## Fill the remaining space.
 235     if ((ht >= 2 * hmin)); then h="ht - hmin"; else h=ht; fi
 236     l="(h - t_vextra)/t_lineht" h="l * t_lineht + t_vextra"
 237     run bgclients $term $geom 80x$l+$x+$y
 238     y="y + h" ht="ht - h" n="n + 1"
 239     if ((ht >= hmin)); then
 240       run bgclients $term $geom 80x25+$x+$y
 241       n="n + 1"
 242     fi
 243     x="x + t_wd"
 244   done
 245 }
 246
 247 ###--------------------------------------------------------------------------
 248 ### Requesters.
 249
 250 req () {
 251   declare title=$1 hist=$2; shift 2
 252   cmd=$(xgetline -t "$title" -p "Command:" -Hl "$HOME/$hist") &&
 253   exec "$@" "$cmd"
 254 }
 255
 256 ###--------------------------------------------------------------------------
 257 ### Final waiting.
 258
 259 atom=XINIT_COMMAND$atomtag
 260
 261 xwait () {
 262   while :; do
 263     xatom delete $atom
 264     info "waiting on $atom"
 265     line=$(xatom wait $atom)
 266     info "xatom: $line"
 267
 268     case "$line" in
 269       :help)
 270         xmsg -I -t "xinitrc help" -d "xinitrc commands" - <<EOF &
 271 :help
 272 :emacs :xterms :window-manager :clients
 273 :ask-run :ask-command
 274 :init
 275 :terminal
 276 ! SHELL-COMMAND
 277 CLIENT
 278 EOF
 279         ;;
 280       :emacs | :xterms | :window-manager | :clients)
 281         start-${line#:}
 282         ;;
 283       :terminal)
 284         run bgclients $term
 285         ;;
 286       :init)
 287         initialize
 288         ;;
 289       :exec)
 290         info "restarting xinitrc"
 291         exec "$0" wait nostart
 292         ;;
 293       :ask-run)
 294         req "Shell command" .cmd.hist xcatch -FMiscFixed6x13 -- sh -c&
 295         ;;
 296       :ask-command)
 297         req "xinit command" .xinit.hist xatom set XINIT_COMMAND$atomtag&
 298         ;;
 299       :*)
 300         xmsg -E -t "xinitrc error" "Unknown command \`$line'" &
 301         ;;
 302       !*)
 303         eval "${line#!}"
 304         ;;
 305       *)
 306         set -- $line
 307         run bgclients "$@"
 308         ;;
 309     esac
 310   done
 311 }
 312
 313 ###--------------------------------------------------------------------------
 314 ### Actually start things up.
 315
 316 if [ -f $HOME/.xinitrc-local ]; then
 317   . $HOME/.xinitrc-local
 318 fi
 319
 320 case "$start" in
 321   yes)
 322     info "starting standard clients"
 323     initialize
 324     start-window-manager
 325     start-clients
 326     start-emacs
 327     start-xterms
 328     ;;
 329   no)
 330     info "not starting standard clients"
 331     ;;
 332 esac
 333
 334 case "$wait" in
 335   yes)
 336     xwait
 337     ;;
 338   no)
 339     info "not waiting before exit"
 340     ;;
 341 esac
 342
 343 ###----- That's all, folks --------------------------------------------------