mdw@git.distorted.org.uk Git - profile/blob - 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 $vnc in no) run bginit gnome-panel ;; esac
 138
 139   ## Local clients.
 140   start-clients-local
 141 }
 142
 143 ###--------------------------------------------------------------------------
 144 ### Main screen layout.
 145
 146 ## Choose appropriate clients.
 147 emacs=$(pick_program emacs emacs22 emacs21 emacs)
 148 term=$(pick_program terminal pterm Eterm xterm)
 149
 150 ## Emacs window measurements.
 151 case "$emacs" in
 152   emacs21 | emacs)
 153     e_colwd=492 e_hextra=34
 154     e_colchars=82 e_cextra=-2
 155     e_lineht=13 e_vextra=52
 156     ;;
 157   emacs22)
 158     e_colwd=492 e_hextra=8
 159     e_colchars=82 e_cextra=-6
 160     e_lineht=13 e_vextra=46
 161     ;;
 162 esac
 163
 164 ## Terminal window measurements.
 165 case "$term" in
 166   pterm) t_wd=503 t_lineht=13 t_vextra=23 geom=-geometry;;
 167   Eterm) t_wd=504 t_lineht=13 t_vextra=23 geom=-g;;
 168   xterm) t_wd=507 t_lineht=13 t_vextra=27 geom=-geometry;;
 169 esac
 170
 171 ## GNOME stuff measurements.
 172 declare -i xbound="XWIDTH - 113"
 173
 174 ## Choose a width for Emacs.
 175 ##
 176 ## We'd like it to be as wide as possible, allowing for a column of xterms
 177 ## down the right hand side.  However, I'd prefer a double-width Emacs to a
 178 ## single-width Emacs and xterms.  If it's not going to work at all, a single
 179 ## Emacs column will have to do.  Also, there's a strange thing with Emacs21
 180 ## and the toolbar, so we add on some rows which are later mysteriously
 181 ## subtracted.
 182
 183 declare -i ecols="(xbound - t_wd - e_hextra)/e_colwd"
 184 if (( ecols < 2 && xbound > e_colwd * 2 + e_hextra )); then
 185   ecols=2
 186 elif (( ecols < 1 )); then
 187   ecols=1
 188 fi
 189
 190 declare -i \
 191   emacsx="ecols * e_colchars + e_cextra" \
 192   emacsy="(XHEIGHT - e_vextra)/e_lineht"
 193
 194 start-emacs () {
 195   run bgclients noip $emacs -geometry ${emacsx}x${emacsy}+0+0
 196 }
 197
 198 ## Now place some xterms.
 199 ##
 200 ## A few smaller xterms are in general better than one great big one.  35
 201 ## lines is a good height for most terminals.  25 lines is a minimum.  The
 202 ## strategy for doling out xterms into a column is to make as many 35-liners
 203 ## as we can, until the remaining space would be too small for a 25-liner.
 204 ## If we can get two 25s out of that then we do (largest first); otherwise
 205 ## just make one big one.  We stop at the end of a page, once we've made
 206 ## three xterms.
 207
 208 start-xterms () {
 209
 210   ## Initialize some parameters.
 211   declare -i x="ecols * e_colwd + e_hextra"
 212   declare -i n=0 pgx=0 l h y ht
 213   declare -i hstd="35 * t_lineht + t_vextra" hmin="25 * t_lineht + t_vextra"
 214
 215   ## Do the placement.
 216   while :; do
 217
 218     ## Start a new iteration.
 219     if ((x + t_wd > xbound)); then
 220       if ((n >= 3)); then break; fi
 221       x="pgx + XWIDTH" pgx="pgx + XWIDTH" xbound="xbound + XWIDTH"
 222     fi
 223
 224     ## Make large xterms.
 225     y=0 ht=XHEIGHT
 226     while ((ht - hstd >= hmin)); do
 227       run bgclients $term $geom 80x35+$x+$y
 228       y="y + hstd" ht="ht - hstd" n="n + 1"
 229     done
 230
 231     ## Fill the remaining space.
 232     if ((ht >= 2 * hmin)); then h="ht - hmin"; else h=ht; fi
 233     l="(h - t_vextra)/t_lineht" h="l * t_lineht + t_vextra"
 234     run bgclients $term $geom 80x$l+$x+$y
 235     y="y + h" ht="ht - h" n="n + 1"
 236     if ((ht >= hmin)); then
 237       run bgclients $term $geom 80x25+$x+$y
 238       n="n + 1"
 239     fi
 240     x="x + t_wd"
 241   done
 242 }
 243
 244 ###--------------------------------------------------------------------------
 245 ### Final waiting.
 246
 247 atom=XINIT_COMMAND$atomtag
 248
 249 xwait () {
 250   while :; do
 251     xatom delete $atom
 252     info "waiting on $atom"
 253     line=$(xatom wait $atom)
 254     info "xatom: $line"
 255
 256     case "$line" in
 257       :help)
 258         xmsg -I -t "xinitrc help" -d "xinitrc commands" - <<EOF &
 259 :help
 260 :emacs :xterms :window-manager :clients
 261 :init
 262 :terminal
 263 ! SHELL-COMMAND
 264 CLIENT
 265 EOF
 266         ;;
 267       :emacs | :xterms | :window-manager | :clients)
 268         start-${line#:}
 269         ;;
 270       :terminal)
 271         run bgclients $term
 272         ;;
 273       :init)
 274         initialize
 275         ;;
 276       :exec)
 277         info "restarting xinitrc"
 278         exec "$0" wait nostart
 279         ;;
 280       :*)
 281         xmsg -E -t "xinitrc error" "Unknown command \`$line'" &
 282         ;;
 283       !*)
 284         eval "${line#!}"
 285         ;;
 286       *)
 287         set -- $line
 288         run bgclients "$@"
 289         ;;
 290     esac
 291   done
 292 }
 293
 294 ###--------------------------------------------------------------------------
 295 ### Actually start things up.
 296
 297 if [ -f $HOME/.xinitrc-local ]; then
 298   . $HOME/.xinitrc-local
 299 fi
 300
 301 case "$start" in
 302   yes)
 303     info "starting standard clients"
 304     initialize
 305     start-window-manager
 306     start-clients
 307     start-emacs
 308     start-xterms
 309     ;;
 310   no)
 311     info "not starting standard clients"
 312     ;;
 313 esac
 314
 315 case "$wait" in
 316   yes)
 317     xwait
 318     ;;
 319   no)
 320     info "not waiting before exit"
 321     ;;
 322 esac
 323
 324 ###----- That's all, folks --------------------------------------------------