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#compdef stdbuf gstdbuf
local -a short long buf args
local i opt gnu=0
short=( -e -i -o )
long=( --error --input --output )
buf=( err in out )
opt='[set initial buffering for std${buf[i]}]:mode or size:((0\:unbuffered L\:line\ buffered'
if _pick_variant gnu=GNU freebsd --version; then
gnu=1
args=(
'(- *)--help[display usage information]'
'(- *)--version[display version information]'
)
else
opt+=' B\:fully\ buffered'
fi
opt+='))'
for ((i=1;i<=3;i++)); do
args+=( "(${long[i]})${short[i]}+${(e)opt}" )
(( gnu )) && args+=(
"(${short[i]})${long[i]}=${(e)opt}"
)
done
(( CURRENT > 2 )) && args+=( '*::command:_normal' )
_arguments -s -S $args
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