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#compdef man apropos whatis
setopt localoptions rcexpandparam
local rep expl star approx mrd
if [[ $words[1] == man ]] && (( $words[(I)-l] + $words[(I)--local-file] )); then
_files || return 0
fi
if [[ $compstate[pattern_match] != [^*] ]]; then
# If a string other than *, we just want correction, so no `*'.
star='*'
fi
if [[ -n $_comp_correct ]]; then
# If this is set, we are correcting with this many approximations.
approx="(#a${_comp_correct})"
fi
if (( ! $#manpath )); then
local mp
mp=($(manpath 2>/dev/null))
[[ "$mp" == *:* ]] && mp=( ${(s.:.)mp} )
manpath=( $mp )
fi
(( $#manpath )) || manpath=( ${(s.:.)$(manpath 2>/dev/null)} ) ||
manpath=( /usr/man(-/N) /(opt|usr)/(dt|share|X11R6|local)/(cat|)man(-/N) )
# `sman' is the SGML manual directory for Solaris 7.
# 1M is system administrator commands on SVR4
mrd=(${^manpath/\%L/${LANG:-En_US.ASCII}}/mandb(N))
if [[ $words[2] = (<->*|1M|l|n) ]]; then
rep=(
$manpath/(sman|man|cat)${words[2]}/${~approx}$PREFIX${~star}$SUFFIX.*(N:t) )
(($#mrd)) && rep[$#rep+1]=($(awk "\$2 == \"$words[2]\" {print \$1}" $mrd))
else
rep=( $manpath/(sman|man|cat)*/${~approx}$PREFIX${~star}$SUFFIX.*(N:t) )
(($#mrd)) && rep[$#rep+1]=($(awk '{print $1}' $mrd))
fi
# Remove any compression suffix, then remove the minimum possible string
# beginning with .<->: that handles problem cases like files called
# `POSIX.1.5'.
(( $#rep )) && _wanted manuals expl 'manual page' \
compadd - ${${rep%%.(bz2|z|gz|Z)}%.<->*}
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