--- /dev/null
+#!/bin/zsh
+
+# utility functions {{{
+# this function checks if a command exists and returns either true
+# or false. This avoids using 'which' and 'whence', which will
+# avoid problems with aliases for which on certain weird systems. :-)
+# Usage: check_com [-c|-g] word
+# -c only checks for external commands
+# -g does the usual tests and also checks for global aliases
+check_com() {
+ emulate -L zsh
+ local -i comonly gatoo
+
+ if [[ $1 == '-c' ]] ; then
+ (( comonly = 1 ))
+ shift
+ elif [[ $1 == '-g' ]] ; then
+ (( gatoo = 1 ))
+ else
+ (( comonly = 0 ))
+ (( gatoo = 0 ))
+ fi
+
+ if (( ${#argv} != 1 )) ; then
+ printf 'usage: check_com [-cg] <command>\n' >&2
+ return 1
+ fi
+
+ if (( comonly > 0 )) ; then
+ [[ -n ${commands[$1]} ]] && return 0
+ return 1
+ fi
+
+ if [[ -n ${commands[$1]} ]] \
+ || [[ -n ${functions[$1]} ]] \
+ || [[ -n ${aliases[$1]} ]] \
+ || [[ -n ${reswords[(r)$1]} ]] ; then
+
+ return 0
+ fi
+
+ if (( gatoo > 0 )) && [[ -n ${galiases[$1]} ]] ; then
+ return 0
+ fi
+
+ return 1
+}
+
+# creates an alias and precedes the command with
+# sudo if $EUID is not zero.
+salias() {
+ emulate -L zsh
+ local only=0 ; local multi=0
+ while [[ $1 == -* ]] ; do
+ case $1 in
+ (-o) only=1 ;;
+ (-a) multi=1 ;;
+ (--) shift ; break ;;
+ (-h)
+ printf 'usage: salias [-h|-o|-a] <alias-expression>\n'
+ printf ' -h shows this help text.\n'
+ printf ' -a replace '\'' ; '\'' sequences with '\'' ; sudo '\''.\n'
+ printf ' be careful using this option.\n'
+ printf ' -o only sets an alias if a preceding sudo would be needed.\n'
+ return 0
+ ;;
+ (*) printf "unkown option: '%s'\n" "$1" ; return 1 ;;
+ esac
+ shift
+ done
+
+ if (( ${#argv} > 1 )) ; then
+ printf 'Too many arguments %s\n' "${#argv}"
+ return 1
+ fi
+
+ key="${1%%\=*}" ; val="${1#*\=}"
+ if (( EUID == 0 )) && (( only == 0 )); then
+ alias -- "${key}=${val}"
+ elif (( EUID > 0 )) ; then
+ (( multi > 0 )) && val="${val// ; / ; sudo }"
+ alias -- "${key}=sudo ${val}"
+ fi
+
+ return 0
+}
+
+# Check if we can read given files and source those we can.
+xsource() {
+ emulate -L zsh
+ if (( ${#argv} < 1 )) ; then
+ printf 'usage: xsource FILE(s)...\n' >&2
+ return 1
+ fi
+
+ while (( ${#argv} > 0 )) ; do
+ [[ -r $1 ]] && source $1
+ shift
+ done
+ return 0
+}
+
+# Check if we can read a given file and 'cat(1)' it.
+xcat() {
+ emulate -L zsh
+ if (( ${#argv} != 1 )) ; then
+ printf 'usage: xcat FILE\n' >&2
+ return 1
+ fi
+
+ [[ -r $1 ]] && cat $1
+ return 0
+}
+
+# Remove these functions again, they are of use only in these
+# setup files. This should be called at the end of .zshrc.
+xunfunction() {
+ emulate -L zsh
+ local -a funcs
+ funcs=(salias xcat xsource xunfunction zrcautoload)
+
+ for func in $funcs ; do
+ [[ -n ${functions[$func]} ]] \
+ && unfunction $func
+ done
+ return 0
+}
+
+#}}}
+
+# Handles command not fount error
+function command_not_found_handler() {
+ emulate -L zsh
+ if [[ -x /usr/share/command-not-found/command-not-found ]] ; then
+ /usr/share/command-not-found/command-not-found $1
+ fi
+ return 1
+}
+
+# Gets battery percentage.
+battery() {
+ PERCENT="${${"$(acpi 2>/dev/null)"}/(#b)[[:space:]]#Battery <->: [^0-9]##, (<->)%*/${match[1]}}"
+}
+
+# Sets color in BATTCOLOR, designed to be used with RPROMPT.
+batcolor() {
+ battery
+ if [ ! -z $PERCENT ]; then
+ if (acpi | head -n 1 | grep "Charging") 2> /dev/null 1>&2; then
+ BATTCOLOR="%F{cyan}"
+ else
+ if [ $PERCENT -gt 65 ]; then
+ BATTCOLOR="%F{green}"
+ else
+ if [ $PERCENT -gt 32 ]; then
+ BATTCOLOR="%F{yellow}"
+ else
+ BATTCOLOR="%F{red}"
+ fi
+ fi
+ fi
+ BATTERY="${BATTCOLOR} ${PERCENT} %%"
+ else
+ BATTERY=""
+ fi
+}
+