[profile] / dot / shell-rc

### -*-sh-*-
###
### Common per-shell configuration.

###--------------------------------------------------------------------------
### Utilities.

__mdw_programp () { type >/dev/null 2>&1 "$1"; }

__mdw_source_if_exists () {
  local i
  for i in "$@"; do
    if [ -r "$i" ]; then . "$i"; fi
  done
}

###--------------------------------------------------------------------------
### Hooks.

__mdw_addhook () {
  local hk=$1 fn=$2 t

  eval t=\${$hk+t}
  case $t in t) ;; *) echo >&2 "unknown hook \`$hk'"; return 2; esac

  eval t=\$$hk
  case " $t " in
    *" $fn "*) ;;
    *) eval "$hk=\${$hk:+\$$hk }\$fn" ;;
  esac
}

__mdw_delhook () {
  local hk=$1 fn=$2 t l r

  eval t=\${$hk+t}
  case $t in t) ;; *) echo >&2 "unknown hook \`$hk'"; return 2; esac

  eval t=\" \$$hk \"
  case $t in
    *" $fn "*)
      l=${t%% $fn*} r=${t##*$fn }
      l=${l# } r=${r% }
      eval "$hk=\$l\${l:+ }\$r"
      ;;
  esac
}

__mdw_setrc () { return $1; }

__mdw_runhook () {
  local hk=$1 saverc=$? t i; shift

  eval t=\${$hk+t}
  case $t in t) ;; *) echo >&2 "unknown hook \`$hk'"; return 2; esac

  eval t=\$$hk
  for i in $t; do __mdw_setrc $saverc; "$i" "$@"; done
}

###--------------------------------------------------------------------------
### Prompt machinery.

__mdw_host=$(hostname)
__mdw_hqual=
__mdw_hqual=$__mdw_hqual${SCHROOT_CHROOT_NAME+/$SCHROOT_CHROOT_NAME}
__mdw_hqual=$__mdw_hqual${CROSS_BUILDENV+/$CROSS_BUILDENV}
__mdw_set_prompt_hacks () { host=$__mdw_host; dir=""; }

__mdw_system=$(uname -s)
: ${USER-${LOGNAME-$(id -un)}}
__mdw_user=$USER

case $(id -u) in
  0)
    __mdw_rootp=t
    ;;
  *)
    case $__mdw_system in
      CYGWIN_*)
	case " $(id -G) " in
	  *" 544 "*) __mdw_rootp=t __mdw_user="$__mdw_user%admin" ;;
	  *) __mdw_rootp=nil ;;
	esac
	;;
      *)
	__mdw_rootp=nil
	;;
    esac
esac

__mdw_set_prompt_pieces () {

  ## Fancy highlighting in some terminals.
  local bold unbold nl more host dir
  local gitcolour rccolour uncolour
  bold="" unbold="" nl="" more=""
  gitcolour="" rccolour="" uncolour=""
  __mdw_set_prompt_hacks

  ## Choose the right delimiters.  Highlight root prompts specially;
  ## highlight when I'm running as some other user.  Highlight when this
  ## isn't the outermost shell on the terminal.
  local left right u tty
  case $__mdw_rootp in
    t)
      left=$(echo « | iconv -f UTF-8 -t //translit)
      right=$(echo » | iconv -f UTF-8 -t //translit)
      ;;
    nil)
      case $USER in
	mdw | mwooding | nemo) u="" left="[" right="]" ;;
	*) u="$__mdw_user@" left="{" right="}" ;;
      esac
      tty=$(tty)
      case "$__mdw_tty" in
	"$tty") left="<" right=">" ;;
	*) __mdw_tty=$tty; export __mdw_tty ;;
      esac
      ;;
  esac

  ## If this session is insecure then highlight that.
  local sec_l sec_r h
  h=$(hostname)
  case ${SSH_CLIENT-nil},${SCHROOT_CHROOT_NAME-nil},$__mdw_sechost in
    nil,nil,"$h") sec_l="" sec_r="" ;;
    nil,nil,*) sec_l="(" sec_r=")" ;;
    *) sec_l="" sec_r=""
  esac

  ## If this is an schroot environment or some other interesting augmented
  ## environment then point this out.

  ## Put together the main pieces.
  __mdw_prompt_left="$nl$bold$left$sec_l$u$host$__mdw_hqual$sec_r$dir"
  __mdw_prompt_git_left="$unbold$gitcolour"
  __mdw_prompt_git_right="$uncolour$bold"
  __mdw_prompt_rc_left="$unbold$rccolour"
  __mdw_prompt_rc_right="$uncolour$bold"
  __mdw_prompt_right="$right$unbold"
  __mdw_prompt_more=" $more$bold>$unbold "
}

__mdw_set_prompt () {
  case "${TERM-dumb}:${INSIDE_EMACS+$INSIDE_EMACS}" in
    dumb:)
      case $(id -u) in 0) PS1='# ' ;; *) PS1='$ ' ;; esac
      PS2='> '
      ;;
    *)
      __mdw_last_rc=$?
      local git rc
      if type __git_ps1 >/dev/null 2>&1; then
	git="$__mdw_prompt_git_left$(__git_ps1)$__mdw_prompt_git_right"
      else
	git=""
      fi
      case $__mdw_last_rc in
	0) rc="" ;;
	*) rc="$__mdw_prompt_rc_left rc=$__mdw_last_rc$__mdw_prompt_rc_right" ;;
      esac
      PS1="$__mdw_prompt_left$git$rc$__mdw_prompt_right"
      PS2="$PS1$__mdw_prompt_more"
      unset __mdw_last_rc
      ;;
  esac
}

__mdw_xterm_settitle () {
  printf >/dev/tty \
    "\e]2;%s@%s:%s – %s\e\\" \
    "$__mdw_user" "$__mdw_host$__mdw_hqual" "$PWD" \
    "$1"
}
__mdw_xterm_precmd () { __mdw_xterm_settitle "$__mdw_shell"; }
__mdw_xterm_preexec () { __mdw_xterm_settitle "$1"; }

__mdw_screen_settitle () {
  printf >/dev/tty \
    "\ek%s\e\\" \
    "$1"
}
__mdw_screen_precmd () { __mdw_screen_settitle "$__mdw_shell"; }
__mdw_screen_preexec () { __mdw_screen_settitle "$1"; }

if [ -t 0 ]; then
  case ${STY+t},${__mdw_precmd_hook+t},${__mdw_preexec_hook+t},${TERM} in
    ,t,t,xterm*)
      __mdw_addhook __mdw_precmd_hook __mdw_xterm_precmd
      __mdw_addhook __mdw_preexec_hook __mdw_xterm_preexec
      ;;
    t,t,t,*)
      __mdw_addhook __mdw_precmd_hook __mdw_screen_precmd
      __mdw_addhook __mdw_preexec_hook __mdw_screen_preexec
      ;;
  esac
  case ${__mdw_precmd_hook+t} in
    t) __mdw_addhook __mdw_precmd_hook __mdw_set_prompt ;;
  esac
fi

###--------------------------------------------------------------------------
### Some handy aliases.

alias cx='chmod +x'
alias which="command -v"
alias rc="rc -l"
rootly () {
  case $# in 0) set -- "${SHELL-/bin/sh}" ;; esac
  $__MDW_ROOTLY "$@"
}
alias r=rootly
alias re="rootly $EDITOR"
alias pstree="pstree -hl"
alias cdtmp='cd ${TMPDIR-/tmp}'
alias pushtmp='pushd ${TMPDIR-/tmp}'
alias e="$EDITOR"
alias svn="svnwrap svn"
alias @="ssh"
alias make="nice make"
alias cross-run="nice cross-run"
alias gdb="gdb -q"

## Shut up Lisp interpreters.
alias clisp="clisp -q -q"
alias cmucl="rlwrap cmucl -quiet"
alias ecl="rlwrap ecl"
alias sbcl="rlwrap sbcl --noinform"
alias ccl="rlwrap ccl"
alias ccl32="rlwrap ccl32"
alias ccl64="rlwrap ccl64"
alias abcl="rlwrap abcl --noinform"

###--------------------------------------------------------------------------
### Colour output.

## Arrange for `ls' output to be in colour.
if __mdw_programp dircolors; then eval $(dircolors -b "$HOME/.dircolors")
else unset LS_COLORS; fi

unalias ls 2>/dev/null || :
ls () {
  if [ -t 1 ]; then command ls $LS_OPTIONS ${LS_COLORS+--color=auto} "$@"
  else command ls "$@"; fi
}

## Arrange for `grep' output to be in colour.
export GREP_COLORS="mt=01;31:ms=01;31:mc=031;31:fn=36:ln=36:bn=36:se=34"

greplike () {
  local grep=$1; shift
  if [ -t 1 ]; then
    command $grep ${GREP_COLORS+--color=always} "$@" | mdw-pager
  else
    command $grep "$@"
  fi
}
alias grep="greplike grep"
alias egrep="greplike egrep"
alias fgrep="greplike fgrep"
alias zgrep="greplike zgrep"

## Arrange for `diff' output to be in colour.
export DIFF_COLORS="hd=1:ln=36:ad=32:de=31"
difflike () {
  local diff=$1; shift
  if [ -t 1 ]; then
    command $diff \
	    ${DIFF_COLORS+--color=always} \
	    ${DIFF_COLORS+--palette="$DIFF_COLORS"} \
	    "$@" | mdw-pager
  else
    command $diff "$@" | cat
  fi
}
alias diff="difflike diff"

###--------------------------------------------------------------------------
### Other hacks.

## Turn off pagers inside Emacs shell buffers.
case "$INSIDE_EMACS" in
  2[2-9].*,comint | [3-9][0-9].*,comint) export PAGER=cat ;;
esac

###--------------------------------------------------------------------------
### More complicated shell functions.

## xt [@HOST] XTERM-ARGS
##
## Open a terminal, maybe on a remote host.
xt () {
  case "$1" in
    @*)
      local remote=${1#@} title
      shift
      if [ $# -gt 0 ]; then
	title="xterm [$remote] $1"
      else
	title="xterm [$remote]"
      fi
      (xterm -title "$title" -e ssh $remote "$@" &)
      ;;
    *)
      (xterm "$@" &)
      ;;
  esac
}

## core [y|n]
##
## Tweak core dumps on and off, or show the current status.
core () {
  case "x$1" in
    xon|xy|xyes) ulimit -Sc $(ulimit -Hc) ;;
    xoff|xn|xno) ulimit -Sc 0 ;;
    x)
      local l=$(ulimit -Sc)
      case $l in
	0) echo "Core dumps disabled" ;;
	unlimited) echo "Core dumps enabled" ;;
	*) echo "Core dump limit is $l blocks" ;;
      esac
      ;;
    *)
      echo >&2 "usage: core [y|n]"
      return 1
      ;;
  esac
}

## world [NAME]
##
## Set current security world to NAME.  With no NAME, print the currently
## selected world.
world () {
  local nfast=${NFAST_HOME-/opt/nfast}
  local kmdata
  case "$#" in
    0)
      echo "${NFAST_KMDATA#$nfast/kmdata-}"
      ;;
    *)
      if [ -d "$1" ]; then
	kmdata=$1
      elif [ -d "$nfast/kmdata-$1" ]; then
	kmdata=$nfast/kmdata-$1
      else
	echo >&2 "world: can't find world $1"
	return 1
      fi
      shift
      case "$#" in
	0) export NFAST_KMDATA=$kmdata ;;
	*) "$@" ;;
      esac
      ;;
  esac
}

## path-add [VAR] DIR
##
## Add DIR to the beginning of PATH-like variable VAR (defaults to PATH) if
## it's not there already.
path_add () {
  local pathvar export dir val
  case $# in
    1) pathvar=PATH dir=$1 export="export PATH" ;;
    2) pathvar=$1 dir=$2 export=: ;;
    *) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
  esac
  eval val=\$$pathvar
  case ":$val:" in
    *:"$dir":*) ;;
    *) val=$dir:$val ;;
  esac
  eval $pathvar=\$val
  eval $export
}

## path-remove [VAR] DIR
##
## Remove DIR from PATH-like variable VAR (defaults to PATH); it's not an
## error if DIR isn't in VAR.
path_remove () {
  local pathvar export dir val
  case $# in
    1) pathvar=PATH dir=$1 export="export PATH" ;;
    2) pathvar=$1 dir=$2 export=: ;;
    *) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
  esac
  eval val=\$$pathvar
  case ":$val:" in
    :"$dir":) val= ;;
    :"$dir":*) val=${val#$dir:} ;;
    *:"$dir":) val=${val%:$dir} ;;
    *:"$dir":*) val=${val%%:$dir:*}:${val#*:$dir:} ;;
  esac
  eval $pathvar=\$val
  eval $export
}

## pathhack [-f] +HACK|-HACK...
##
## Each HACK refers to a subdirectory of `~/bin/hacks'.  A hack name preceded
## by `+' adds the directory to the PATH; a `-' removes.  Adding a hack
## that's already on the PATH doesn't do anything unless `-f' is set, in
## which case it gets moved to the beginning.  With no arguments, print the
## currently installed hacks.
pathhack () {
  local p e force arg hack dir
  p=$PATH
  if [ $# -eq 0 ]; then
    while :; do
      e=${p%%:*}
      case "$e" in "$HOME/bin/hacks/"*) echo ${e#$HOME/bin/hacks/} ;; esac
      case "$p" in *:*) p=${p#*:} ;; *) break ;; esac
    done
    return
  fi
  force=nil
  while [ $# -gt 0 ]; do
    arg=$1
    case "$arg" in
      -f | --force) force=t; shift; continue ;;
      --) shift; break ;;
      [-+]*) ;;
      *) break; ;;
    esac
    hack=${arg#[+-]}
    dir=$HOME/bin/hacks/$hack
    if ! [ -d "$dir" ]; then
      echo "$0: path hack $hack not found"
      return 1
    fi
    case "$arg,$force,:$PATH:" in
      -*,*,*:"$dir":*) path_remove p "$dir" ;;
      +*,t,*:"$dir":*) path_remove p "$dir"; path_add p "$dir" ;;
      +*,nil,*:"$dir":*) ;;
      +*,*) path_add p "$dir" ;;
    esac
    shift
  done
  if [ $# -eq 0 ]; then PATH=$p; export PATH
  else PATH=$p "$@"; fi
}

###--------------------------------------------------------------------------
### Finishing touches.

## Make sure `$HOME/bin' is on the path.
path_add "$HOME/bin"

## Set the temporary directory again.  (A setuid or setgid program may have
## unhelpfully forgotten this for us.)
case ${TMPDIR+t} in
  t) ;;
  *) if __mdw_programp tmpdir; then eval $(tmpdir -b); fi ;;
esac

## For `root' use -- some simple molly-guards.
case $(id -u) in
  0)
    alias rm="rm -i" cp="cp -i" mv="mv -i"
    set -o noclobber
    ;;
esac

## Run any local hooks.
__mdw_source_if_exists "$HOME/.shell-local"

###----- That's all, folks --------------------------------------------------
Commit	Line	Data
74a53e28 MW	1	### --sh--
	2	###
	3	### Common per-shell configuration.
	4
	5	###--------------------------------------------------------------------------
	6	### Utilities.
	7
	8	__mdw_programp () { type >/dev/null 2>&1 "$1"; }
	9
	10	__mdw_source_if_exists () {
	11	local i
	12	for i in "$@"; do
	13	if [ -r "$i" ]; then . "$i"; fi
	14	done
	15	}
	16
	17	###--------------------------------------------------------------------------
4877b8d8 MW	18	### Hooks.
	19
	20	__mdw_addhook () {
	21	local hk=$1 fn=$2 t
	22
	23	eval t=\${$hk+t}
	24	case $t in t) ;; *) echo >&2 "unknown hook \`$hk'"; return 2; esac
	25
	26	eval t=\$$hk
	27	case " $t " in
	28	" $fn ") ;;
	29	*) eval "$hk=\${$hk:+\$$hk }\$fn" ;;
	30	esac
	31	}
	32
	33	__mdw_delhook () {
	34	local hk=$1 fn=$2 t l r
	35
	36	eval t=\${$hk+t}
	37	case $t in t) ;; *) echo >&2 "unknown hook \`$hk'"; return 2; esac
	38
	39	eval t=\" \$$hk \"
	40	case $t in
	41	" $fn ")
	42	l=${t%% $fn} r=${t##$fn }
	43	l=${l# } r=${r% }
	44	eval "$hk=\$l\${l:+ }\$r"
	45	;;
	46	esac
	47	}
	48
	49	__mdw_setrc () { return $1; }
	50
	51	__mdw_runhook () {
	52	local hk=$1 saverc=$? t i; shift
	53
	54	eval t=\${$hk+t}
	55	case $t in t) ;; *) echo >&2 "unknown hook \`$hk'"; return 2; esac
	56
	57	eval t=\$$hk
	58	for i in $t; do __mdw_setrc $saverc; "$i" "$@"; done
	59	}
	60
	61	###--------------------------------------------------------------------------
74a53e28 MW	62	### Prompt machinery.
74a53e28 MW	63
2bbac58c	64	__mdw_host=$(hostname)
d4bbc0c0 MW	65	__mdw_hqual=
	66	__mdw_hqual=$__mdw_hqual${SCHROOT_CHROOT_NAME+/$SCHROOT_CHROOT_NAME}
	67	__mdw_hqual=$__mdw_hqual${CROSS_BUILDENV+/$CROSS_BUILDENV}
2bbac58c	68	__mdw_set_prompt_hacks () { host=$__mdw_host; dir=""; }
74a53e28	69
08785e51	70	__mdw_system=$(uname -s)
c35d2efc	71	: ${USER-${LOGNAME-$(id -un)}}
85e5c878	72	__mdw_user=$USER
c35d2efc	73
fde3353f	74	case $(id -u) in
08785e51 MW	75	0)
	76	__mdw_rootp=t
	77	;;
	78	*)
	79	case $__mdw_system in
	80	CYGWIN_*)
	81	case " $(id -G) " in
	82	" 544 ") __mdw_rootp=t __mdw_user="$__mdw_user%admin" ;;
	83	*) __mdw_rootp=nil ;;
	84	esac
	85	;;
	86	*)
	87	__mdw_rootp=nil
	88	;;
	89	esac
fde3353f MW	90	esac
fde3353f MW	91
74a53e28	92	__mdw_set_prompt_pieces () {
74a53e28 MW	93
74a53e28 MW	94	## Fancy highlighting in some terminals.
441fb2bd MW	95	local bold unbold nl more host dir
	96	local gitcolour rccolour uncolour
	97	bold="" unbold="" nl="" more=""
	98	gitcolour="" rccolour="" uncolour=""
74a53e28 MW	99	__mdw_set_prompt_hacks
	100
	101	## Choose the right delimiters. Highlight root prompts specially;
	102	## highlight when I'm running as some other user. Highlight when this
	103	## isn't the outermost shell on the terminal.
81ba988c	104	local left right u tty
fde3353f MW	105	case $__mdw_rootp in
fde3353f MW	106	t)
74a53e28 MW	107	left=$(echo « \| iconv -f UTF-8 -t //translit)
	108	right=$(echo » \| iconv -f UTF-8 -t //translit)
	109	;;
fde3353f	110	nil)
81ba988c	111	case $USER in
74a53e28	112	mdw \| mwooding \| nemo) u="" left="[" right="]" ;;
85e5c878	113	*) u="$__mdw_user@" left="{" right="}" ;;
74a53e28 MW	114	esac
	115	tty=$(tty)
	116	case "$__mdw_tty" in
	117	"$tty") left="<" right=">" ;;
	118	*) __mdw_tty=$tty; export __mdw_tty ;;
	119	esac
	120	;;
	121	esac
	122
	123	## If this session is insecure then highlight that.
	124	local sec_l sec_r h
	125	h=$(hostname)
	126	case ${SSH_CLIENT-nil},${SCHROOT_CHROOT_NAME-nil},$__mdw_sechost in
	127	nil,nil,"$h") sec_l="" sec_r="" ;;
	128	nil,nil,*) sec_l="(" sec_r=")" ;;
	129	*) sec_l="" sec_r=""
	130	esac
	131
1a1af55e MW	132	## If this is an schroot environment or some other interesting augmented
1a1af55e MW	133	## environment then point this out.
74a53e28 MW	134
74a53e28 MW	135	## Put together the main pieces.
d4bbc0c0	136	__mdw_prompt_left="$nl$bold$left$sec_l$u$host$__mdw_hqual$sec_r$dir"
74a53e28 MW	137	__mdw_prompt_git_left="$unbold$gitcolour"
	138	__mdw_prompt_git_right="$uncolour$bold"
	139	__mdw_prompt_rc_left="$unbold$rccolour"
	140	__mdw_prompt_rc_right="$uncolour$bold"
	141	__mdw_prompt_right="$right$unbold"
55360ba3	142	__mdw_prompt_more=" $more$bold>$unbold "
74a53e28 MW	143	}
	144
	145	__mdw_set_prompt () {
062b450d	146	case "${TERM-dumb}:${INSIDE_EMACS+$INSIDE_EMACS}" in
d281a650	147	dumb:)
55bd0261 MW	148	case $(id -u) in 0) PS1='# ' ;; *) PS1='$ ' ;; esac
	149	PS2='> '
	150	;;
	151	*)
	152	__mdw_last_rc=$?
	153	local git rc
	154	if type __git_ps1 >/dev/null 2>&1; then
	155	git="$__mdw_prompt_git_left$(__git_ps1)$__mdw_prompt_git_right"
	156	else
	157	git=""
	158	fi
	159	case $__mdw_last_rc in
	160	0) rc="" ;;
	161	*) rc="$__mdw_prompt_rc_left rc=$__mdw_last_rc$__mdw_prompt_rc_right" ;;
	162	esac
	163	PS1="$__mdw_prompt_left$git$rc$__mdw_prompt_right"
55360ba3	164	PS2="$PS1$__mdw_prompt_more"
55bd0261 MW	165	unset __mdw_last_rc
55bd0261 MW	166	;;
74a53e28	167	esac
74a53e28 MW	168	}
74a53e28 MW	169
1e8b505f MW	170	__mdw_xterm_settitle () {
	171	printf >/dev/tty \
	172	"\e]2;%s@%s:%s – %s\e\\" \
85e5c878	173	"$__mdw_user" "$__mdw_host$__mdw_hqual" "$PWD" \
1e8b505f MW	174	"$1"
	175	}
	176	__mdw_xterm_precmd () { __mdw_xterm_settitle "$__mdw_shell"; }
	177	__mdw_xterm_preexec () { __mdw_xterm_settitle "$1"; }
05f8a57d	178
1e8b505f MW	179	__mdw_screen_settitle () {
	180	printf >/dev/tty \
	181	"\ek%s\e\\" \
	182	"$1"
	183	}
	184	__mdw_screen_precmd () { __mdw_screen_settitle "$__mdw_shell"; }
	185	__mdw_screen_preexec () { __mdw_screen_settitle "$1"; }
74a53e28	186
4877b8d8	187	if [ -t 0 ]; then
05f8a57d MW	188	case ${STY+t},${__mdw_precmd_hook+t},${__mdw_preexec_hook+t},${TERM} in
	189	,t,t,xterm*)
	190	__mdw_addhook __mdw_precmd_hook __mdw_xterm_precmd
	191	__mdw_addhook __mdw_preexec_hook __mdw_xterm_preexec
	192	;;
	193	t,t,t,*)
4877b8d8 MW	194	__mdw_addhook __mdw_precmd_hook __mdw_screen_precmd
	195	__mdw_addhook __mdw_preexec_hook __mdw_screen_preexec
	196	;;
74a53e28	197	esac
4877b8d8 MW	198	case ${__mdw_precmd_hook+t} in
	199	t) __mdw_addhook __mdw_precmd_hook __mdw_set_prompt ;;
	200	esac
	201	fi
74a53e28 MW	202
	203	###--------------------------------------------------------------------------
	204	### Some handy aliases.
	205
	206	alias cx='chmod +x'
	207	alias which="command -v"
	208	alias rc="rc -l"
	209	rootly () {
	210	case $# in 0) set -- "${SHELL-/bin/sh}" ;; esac
	211	$__MDW_ROOTLY "$@"
	212	}
	213	alias r=rootly
	214	alias re="rootly $EDITOR"
	215	alias pstree="pstree -hl"
	216	alias cdtmp='cd ${TMPDIR-/tmp}'
	217	alias pushtmp='pushd ${TMPDIR-/tmp}'
	218	alias e="$EDITOR"
	219	alias svn="svnwrap svn"
	220	alias @="ssh"
daeece4b	221	alias make="nice make"
ee747cc6	222	alias cross-run="nice cross-run"
8712436f	223	alias gdb="gdb -q"
74a53e28	224
4e7092a3 MW	225	## Shut up Lisp interpreters.
	226	alias clisp="clisp -q -q"
	227	alias cmucl="rlwrap cmucl -quiet"
	228	alias ecl="rlwrap ecl"
	229	alias sbcl="rlwrap sbcl --noinform"
6a8c8070 MW	230	alias ccl="rlwrap ccl"
	231	alias ccl32="rlwrap ccl32"
	232	alias ccl64="rlwrap ccl64"
	233	alias abcl="rlwrap abcl --noinform"
4e7092a3	234
74a53e28 MW	235	###--------------------------------------------------------------------------
	236	### Colour output.
	237
	238	## Arrange for `ls' output to be in colour.
	239	if __mdw_programp dircolors; then eval $(dircolors -b "$HOME/.dircolors")
	240	else unset LS_COLORS; fi
	241
	242	unalias ls 2>/dev/null \|\| :
	243	ls () {
	244	if [ -t 1 ]; then command ls $LS_OPTIONS ${LS_COLORS+--color=auto} "$@"
	245	else command ls "$@"; fi
	246	}
	247
	248	## Arrange for `grep' output to be in colour.
	249	export GREP_COLORS="mt=01;31:ms=01;31:mc=031;31:fn=36:ln=36:bn=36:se=34"
	250
	251	greplike () {
	252	local grep=$1; shift
	253	if [ -t 1 ]; then
	254	command $grep ${GREP_COLORS+--color=always} "$@" \| mdw-pager
	255	else
	256	command $grep "$@"
	257	fi
	258	}
	259	alias grep="greplike grep"
	260	alias egrep="greplike egrep"
	261	alias fgrep="greplike fgrep"
	262	alias zgrep="greplike zgrep"
	263
049cd015 MW	264	## Arrange for `diff' output to be in colour.
	265	export DIFF_COLORS="hd=1:ln=36:ad=32:de=31"
	266	difflike () {
	267	local diff=$1; shift
	268	if [ -t 1 ]; then
	269	command $diff \
	270	${DIFF_COLORS+--color=always} \
	271	${DIFF_COLORS+--palette="$DIFF_COLORS"} \
	272	"$@" \| mdw-pager
	273	else
	274	command $diff "$@" \| cat
	275	fi
	276	}
	277	alias diff="difflike diff"
	278
74a53e28 MW	279	###--------------------------------------------------------------------------
	280	### Other hacks.
	281
	282	## Turn off pagers inside Emacs shell buffers.
	283	case "$INSIDE_EMACS" in
	284	2[2-9].,comint \| [3-9][0-9].,comint) export PAGER=cat ;;
	285	esac
	286
	287	###--------------------------------------------------------------------------
	288	### More complicated shell functions.
	289
	290	## xt [@HOST] XTERM-ARGS
	291	##
	292	## Open a terminal, maybe on a remote host.
	293	xt () {
	294	case "$1" in
	295	@*)
	296	local remote=${1#@} title
	297	shift
	298	if [ $# -gt 0 ]; then
	299	title="xterm [$remote] $1"
	300	else
	301	title="xterm [$remote]"
	302	fi
	303	(xterm -title "$title" -e ssh $remote "$@" &)
	304	;;
	305	*)
	306	(xterm "$@" &)
	307	;;
	308	esac
	309	}
	310
	311	## core [y\|n]
	312	##
	313	## Tweak core dumps on and off, or show the current status.
	314	core () {
	315	case "x$1" in
	316	xon\|xy\|xyes) ulimit -Sc $(ulimit -Hc) ;;
	317	xoff\|xn\|xno) ulimit -Sc 0 ;;
	318	x)
	319	local l=$(ulimit -Sc)
	320	case $l in
	321	0) echo "Core dumps disabled" ;;
	322	unlimited) echo "Core dumps enabled" ;;
	323	*) echo "Core dump limit is $l blocks" ;;
	324	esac
	325	;;
	326	*)
	327	echo >&2 "usage: core [y\|n]"
	328	return 1
	329	;;
	330	esac
	331	}
	332
	333	## world [NAME]
	334	##
	335	## Set current security world to NAME. With no NAME, print the currently
	336	## selected world.
	337	world () {
	338	local nfast=${NFAST_HOME-/opt/nfast}
	339	local kmdata
	340	case "$#" in
	341	0)
	342	echo "${NFAST_KMDATA#$nfast/kmdata-}"
343	;;
344	*)
345	if [ -d "$1" ]; then
346	kmdata=$1
347	elif [ -d "$nfast/kmdata-$1" ]; then
348	kmdata=$nfast/kmdata-$1
349	else
350	echo >&2 "world: can't find world $1"
351	return 1
352	fi
353	shift
354	case "$#" in
355	0) export NFAST_KMDATA=$kmdata ;;
356	*) "$@" ;;
357	esac
358	;;
359	esac
360	}
361
362	## path-add [VAR] DIR
363	##
364	## Add DIR to the beginning of PATH-like variable VAR (defaults to PATH) if
365	## it's not there already.
366	path_add () {
367	local pathvar export dir val
368	case $# in
369	1) pathvar=PATH dir=$1 export="export PATH" ;;
370	2) pathvar=$1 dir=$2 export=: ;;
371	*) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
372	esac
373	eval val=\$$pathvar
374	case ":$val:" in
375	:"$dir":) ;;
376	*) val=$dir:$val ;;
377	esac
378	eval $pathvar=\$val
379	eval $export
380	}
381
382	## path-remove [VAR] DIR
383	##
384	## Remove DIR from PATH-like variable VAR (defaults to PATH); it's not an
385	## error if DIR isn't in VAR.
386	path_remove () {
387	local pathvar export dir val
388	case $# in
389	1) pathvar=PATH dir=$1 export="export PATH" ;;
390	2) pathvar=$1 dir=$2 export=: ;;
391	*) echo >&2 "Usage: $0 [VAR] DIR"; return 1 ;;
392	esac
393	eval val=\$$pathvar
394	case ":$val:" in
395	:"$dir":) val= ;;
396	:"$dir":*) val=${val#$dir:} ;;
397	*:"$dir":) val=${val%:$dir} ;;
398	:"$dir":) val=${val%%:$dir:}:${val#:$dir:} ;;
399	esac
400	eval $pathvar=\$val
401	eval $export
402	}
403
404	## pathhack [-f] +HACK\|-HACK...
405	##
406	## Each HACK refers to a subdirectory of `~/bin/hacks'. A hack name preceded
407	## by `+' adds the directory to the PATH; a `-' removes. Adding a hack
408	## that's already on the PATH doesn't do anything unless `-f' is set, in
409	## which case it gets moved to the beginning. With no arguments, print the
410	## currently installed hacks.
411	pathhack () {
412	local p e force arg hack dir
413	p=$PATH
414	if [ $# -eq 0 ]; then
415	while :; do
416	e=${p%%:*}
417	case "$e" in "$HOME/bin/hacks/"*) echo ${e#$HOME/bin/hacks/} ;; esac
418	case "$p" in :) p=${p#:} ;; ) break ;; esac
419	done
420	return
421	fi
422	force=nil
423	while [ $# -gt 0 ]; do
424	arg=$1
425	case "$arg" in
426	-f \| --force) force=t; shift; continue ;;
427	--) shift; break ;;
428	[-+]*) ;;
429	*) break; ;;
430	esac
431	hack=${arg#[+-]}
432	dir=$HOME/bin/hacks/$hack
433	if ! [ -d "$dir" ]; then
434	echo "$0: path hack $hack not found"
435	return 1
436	fi
437	case "$arg,$force,:$PATH:" in
438	-,,:"$dir":) path_remove p "$dir" ;;
439	+,t,:"$dir":*) path_remove p "$dir"; path_add p "$dir" ;;
440	+,nil,:"$dir":*) ;;
441	+,) path_add p "$dir" ;;
442	esac
443	shift
444	done
445	if [ $# -eq 0 ]; then PATH=$p; export PATH
446	else PATH=$p "$@"; fi
447	}
448
449	###--------------------------------------------------------------------------
450	### Finishing touches.
451
4cb8b8da MW	452	## Make sure `$HOME/bin' is on the path.
	453	path_add "$HOME/bin"
	454
6054bdb6 MW	455	## Set the temporary directory again. (A setuid or setgid program may have
6054bdb6 MW	456	## unhelpfully forgotten this for us.)
0a030a39 MW	457	case ${TMPDIR+t} in
	458	t) ;;
	459	*) if __mdw_programp tmpdir; then eval $(tmpdir -b); fi ;;
	460	esac
6054bdb6	461
74a53e28 MW	462	## For `root' use -- some simple molly-guards.
	463	case $(id -u) in
	464	0)
	465	alias rm="rm -i" cp="cp -i" mv="mv -i"
	466	set -o noclobber
	467	;;
	468	esac
	469
	470	## Run any local hooks.
	471	__mdw_source_if_exists "$HOME/.shell-local"
	472
	473	###----- That's all, folks --------------------------------------------------