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