mdw@git.distorted.org.uk Git - profile/blob - dot/bashrc

   1 ### -*-sh-*-
   2 ###
   3 ### Bash session things
   4
   5 ## Only do this if we haven't done it before.  (Note that this guard isn't
   6 ## exported, so subshells will need to make their own arrangements.)
   7 if [ -z "$__mdw_bashrc" ]; then
   8 __mdw_bashrc=done
   9
  10 ## If we've not run the main profile yet, we should do that first.  It sets
  11 ## up things we rely on.  Also, if there's a system script, we should run
  12 ## that too.
  13 [ -z "$__mdw_profile" -a -r $HOME/.bash_profile ] && . $HOME/.bash_profile
  14 [ -r /etc/bashrc ] && . /etc/bashrc
  15
  16 ## Set the temporary directory again.  (If we've switched users, we'll want a
  17 ## different temporary directory.)
  18 [ "${TMPDIR+yes}" ] || eval `tmpdir -b`
  19
  20 ###--------------------------------------------------------------------------
  21 ### Prompt hacking.
  22
  23 ## Only bother if the shell is interactive.
  24 if [ -t 0 ]; then
  25
  26   ## Fancy highlighting in some terminals.
  27   case "$TERM" in
  28     linux*|screen*|xterm*|vt100*|eterm*)
  29       bold="\[$(tput bold)\]" unbold="\[$(tput sgr0)\]" nl="\[
\]" ;;
  30     *)
  31       bold='' unbold='' nl='' ;;
  32   esac
  33
  34   ## Choose the right delimiters.  Highlight root prompts specially;
  35   ## highlight when I'm running as some other user.  Highlight when this
  36   ## isn't the outermost shell on the terminal.
  37   if (( EUID == 0 )); then
  38     left=`echo « | iconv -f utf8 -t //translit`
  39     right=`echo » | iconv -f utf8 -t //translit`
  40   else
  41     case $USER in
  42       mdw|mwooding) u="" left="[" right="]" ;;
  43       *) u="\\u@" left="{" right="}" ;;
  44     esac
  45     if [ "$__mdw_tty" = "`tty`" ]; then
  46       left="<" right=">"
  47     else
  48       export __mdw_tty="`tty`"
  49     fi
  50   fi
  51
  52   ## If this session is insecure then highlight that.
  53   if [ -z "$SSH_CLIENT" ] &&
  54     [ "$__mdw_sechost" != "`hostname`" ]
  55     then
  56     sec_l='(' sec_r=')'
  57   fi
  58
  59   ## Build the prompt string.
  60   PS1="$nl$bold$left$sec_l$u\\h$sec_r \\w$right$unbold"
  61   PS2="$PS1 $bold>$unbold "
  62
  63 fi
  64
  65 ###--------------------------------------------------------------------------
  66 ### Other shell tweaking.
  67
  68 ## Random shell tweaks.
  69 notify=1
  70 set -b
  71 shopt -u cdable_vars
  72 shopt -s cdspell
  73 shopt -s checkhash
  74 shopt -s checkwinsize
  75 shopt -s cmdhist
  76 shopt -u dotglob
  77 shopt -s expand_aliases
  78 shopt -s extglob
  79 shopt -s globstar
  80 shopt -s gnu_errfmt
  81 shopt -s histappend
  82 shopt -s histreedit
  83 shopt -u histverify
  84 shopt -s hostcomplete
  85 shopt -s huponexit
  86 shopt -s interactive_comments
  87 shopt -s lithist
  88 shopt -u mailwarn
  89 shopt -u nocaseglob
  90 shopt -u nullglob
  91 shopt -s promptvars
  92 shopt -u shift_verbose
  93 shopt -s sourcepath
  94 HISTCONTROL=ignorespace:erasedups
  95
  96 ## Some handy aliases.
  97 alias cx='chmod a+x'
  98 alias which="command -v"
  99 alias rc="rc -l"
 100 alias ssync="rsync -e ssh"
 101 alias rootly=$__MDW_ROOTLY
 102 alias r=rootly
 103 alias re="rootly $EDITOR"
 104 alias pstree="pstree -hl"
 105 alias cdtmp='cd ${TMPDIR-/tmp}'
 106 alias pushtmp='pushd ${TMPDIR-/tmp}'
 107 alias e="$EDITOR"
 108 alias svn="svnwrap svn"
 109 alias @="ssh"
 110
 111 ## Completion.
 112 [ -r /etc/bash_completion ] && . /etc/bash_completion
 113 [ -r $HOME/.bash_completion ] && . $HOME/.bash_completion
 114
 115 ###--------------------------------------------------------------------------
 116 ### Colour output.
 117
 118 ## Arrange for `ls' output to be in colour.
 119 if [ -x /usr/bin/dircolors -o -x /usr/local/bin/dircolors ]; then
 120   eval `dircolors -b ~/.dircolors`
 121 else
 122   unset LS_COLORS
 123 fi
 124
 125 ls () {
 126   if [ -t 1 ]; then
 127     command ls $LS_OPTIONS ${LS_COLORS+--color=auto} "$@"
 128   else
 129     command ls "$@"
 130   fi
 131 }
 132
 133 ## Arrange for `grep' output to be in colour.
 134 export GREP_COLORS="mt=01;31:ms=01;31:mc=031;31:fn=36:ln=36:bn=36:se=34"
 135
 136 greplike () {
 137   declare grep=$1; shift
 138   if [ -t 1 ]; then
 139     command $grep ${GREP_COLORS+--color=always} "$@" | mdw-pager
 140   else
 141     command $grep "$@"
 142   fi
 143 }
 144 alias grep="greplike grep"
 145 alias egrep="greplike egrep"
 146 alias fgrep="greplike fgrep"
 147 alias zgrep="greplike zgrep"
 148
 149 ## Turn off pagers inside Emacs shell buffers.
 150 case "$INSIDE_EMACS" in
 151   22.*,comint) export PAGER=cat ;;
 152 esac
 153
 154 ###--------------------------------------------------------------------------
 155 ### More complicated shell functions.
 156
 157 ## xt [@HOST] XTERM-ARGS
 158 ##
 159 ## Open a terminal, maybe on a remote host.
 160 xt () {
 161   case "$1" in
 162     @*)
 163       local remote=${1#@} title
 164       shift
 165       if [ $# -gt 0 ]; then
 166         title="xterm [$remote] $1"
 167       else
 168         title="xterm [$remote]"
 169       fi
 170       (xterm -title "$title" -e ssh $remote "$@" &)
 171       ;;
 172     *)
 173       (xterm "$@" &)
 174       ;;
 175   esac
 176 }
 177
 178 ## core [y|n]
 179 ##
 180 ## Tweak core dumps on and off, or show the current status.
 181 core () {
 182   case "x$1" in
 183     xon|xy|xyes) ulimit -Sc `ulimit -Hc` ;;
 184     xoff|xn|xno) ulimit -Sc 0 ;;
 185     x)
 186       local l=`ulimit -Sc`
 187       case $l in
 188         0) echo "Core dumps disabled" ;;
 189         unlimited) echo "Core dumps enabled" ;;
 190         *) echo "Core dump limit is $l blocks" ;;
 191       esac
 192       ;;
 193     *)
 194       echo >&2 "usage: core [y|n]"
 195       return 1
 196       ;;
 197   esac
 198 }
 199
 200 ## world [NAME]
 201 ##
 202 ## Set current security world to NAME.  With no NAME, print the currently
 203 ## selected world.
 204 world () {
 205   local nfast=${NFAST_HOME-/opt/nfast}
 206   local kmdata
 207   case "$#" in
 208     0)
 209       echo "${NFAST_KMDATA#$nfast/kmdata-}"
 210       ;;
 211     *)
 212       if [ -d "$1" ]; then
 213         kmdata=$1
 214       elif [ -d "$nfast/kmdata-$1" ]; then
 215         kmdata=$nfast/kmdata-$1
 216       else
 217         echo >&2 "world: can't find world $1"
 218         return 1
 219       fi
 220       shift
 221       case "$#" in
 222         0) export NFAST_KMDATA=$kmdata ;;
 223         *) "$@" ;;
 224       esac
 225       ;;
 226   esac
 227 }
 228
 229 ## Fix `man' under Slowaris.
 230 case "$MACHTYPE" in
 231   *solaris*)
 232     man () {
 233       declare -i i=0
 234       declare arg
 235       declare -a man
 236       for arg; do
 237         case "$arg" in [0-9]*) man[i+=1]="-s" ;; esac
 238         man[i+=1]="$arg"
 239       done
 240       command man "${man[@]}"
 241     }
 242     ;;
 243 esac
 244
 245 ###--------------------------------------------------------------------------
 246 ### Path hacks.
 247
 248 ## path-add [VAR] DIR
 249 ##
 250 ## Add DIR to the beginning of PATH-like variable VAR (defaults to PATH) if
 251 ## it's not there already.
 252 path-add () {
 253   local pathvar export dir val
 254   case $# in
 255     1) pathvar=PATH dir=$1 export="export PATH";;
 256     2) pathvar=$1 dir=$2 export=:;;
 257     *) echo >&2 "Usage: $0 [VAR] DIR";;
 258   esac
 259   eval "val=\$$pathvar"
 260   case ":$val:" in
 261     *:"$dir":*) ;;
 262     *) val=$dir:$val ;;
 263   esac
 264   eval "$pathvar=\$val"
 265   $export
 266 }
 267
 268 ## path-remove [VAR] DIR
 269 ##
 270 ## Remove DIR from PATH-like variable VAR (defaults to PATH); it's not an
 271 ## error if DIR isn't in VAR.
 272 path-remove () {
 273   local pathvar export dir val
 274   case $# in
 275     1) pathvar=PATH dir=$1 export="export PATH";;
 276     2) pathvar=$1 dir=$2 export=:;;
 277     *) echo >&2 "Usage: $0 [VAR] DIR";;
 278   esac
 279   eval "val=\$$pathvar"
 280   case ":$val:" in
 281     :"$dir":) val= ;;
 282     :"$dir":*) val=${val#$dir:} ;;
 283     *:"$dir":) val=${val%:$dir} ;;
 284     *:"$dir":*) val=${val/:$dir:/:} ;;
 285   esac
 286   eval "$pathvar=\$val"
 287   $export
 288 }
 289
 290 ## pathhack [-f] +HACK|-HACK...
 291 ##
 292 ## Each HACK refers to a subdirectory of `~/bin/hacks'.  A hack name preceded
 293 ## by `+' adds the directory to the PATH; a `-' removes.  Adding a hack
 294 ## that's already on the PATH doesn't do anything unless `-f' is set, in
 295 ## which case it gets moved to the beginning.  With no arguments, print the
 296 ## currently installed hacks.
 297 pathhack () {
 298   if [ $# -eq 0 ]; then
 299     local IFS=:
 300     for e in $PATH; do
 301       case "$e" in
 302         "$HOME/bin/hacks/"*)
 303           echo ${e#$HOME/bin/hacks/}
 304           ;;
 305       esac
 306     done
 307     return
 308   fi
 309   local force=nil
 310   local path=$PATH
 311   while [ $# -gt 0 ]; do
 312     arg=$1
 313     case "$arg" in
 314       -f | --force)
 315         force=t
 316         shift
 317         continue
 318         ;;
 319       --)
 320         shift
 321         break
 322         ;;
 323       [-+]*)
 324         ;;
 325       *)
 326         break
 327         ;;
 328     esac
 329     hack=${arg#[+-]}
 330     dir=$HOME/bin/hacks/$hack
 331     [ -d "$dir" ] || {
 332       echo "$0: path hack $hack not found"
 333       return 1
 334     }
 335     case "$arg,$force,:$PATH:" in
 336       -*,*,*:"$dir":*)
 337         path-remove path "$dir"
 338         ;;
 339       +*,t,*:"$dir":*)
 340         path-remove path "$dir"
 341         path-add path "$dir"
 342         ;;
 343       +*,nil,*:"$dir":*)
 344         ;;
 345       +*,*)
 346         path-add path "$dir"
 347         ;;
 348     esac
 349     shift
 350   done
 351   if [ $# -eq 0 ]; then
 352     PATH=$path
 353     export PATH
 354   else
 355     PATH=$path "$@"
 356   fi
 357 }
 358
 359 ###--------------------------------------------------------------------------
 360 ### Finishing touches.
 361
 362 ## For `root' use -- some simple molly-guards.
 363 if (( UID == 0 )); then
 364   alias rm='rm -i' cp='cp -i' mv='mv -i'
 365   set -o noclobber
 366 fi
 367
 368 ## Run any local hooks.
 369 [ -f "$HOME/.bashrc-local" ] && . "$HOME/.bashrc-local"
 370
 371 ## Close the `__mdw_bashrc' guard.
 372 fi
 373
 374 ###----- That's all, folks --------------------------------------------------