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#compdef cat
local -a args
if _pick_variant gnu=GNU unix --version; then
args=(
'(-A --show-all)'{-A,--show-all}'[equivalent to -vET]'
'(-b --number-nonblank -n --number)'{-b,--number-nonblank}'[number nonempty output lines, overrides -n]'
'-e[equivalent to -vE]'
'(-E --show-ends)'{-E,--show-ends}'[display $ at end of each line]'
'(-n --number)'{-n,--number}'[number all output lines]'
'(-s --squeeze-blank)'{-s,--squeeze-blank}'[suppress repeated empty output lines]'
'-t[equivalent to -vT]'
'(-T --show-tabs)'{-T,--show-tabs}'[display TAB characters as ^I]'
'-u[ignored]'
'(-v --show-nonprinting)'{-v,--show-nonprinting}'[use ^ and M- notation, except for LFD and TAB]'
'(- : *)--help[display help and exit]'
'(- : *)--version[output version information and exit]'
'*:files:_files'
)
elif [[ "$OSTYPE" == (freebsd|dragonfly|darwin)* ]]; then
args=(
'(-n)-b[number non-blank output lines]'
'(-v)-e[display $ at the end of each line (implies -v)]'
'-n[number all output lines]'
'-s[squeeze multiple blank lines into one]'
'(-v)-t[display tab as ^I (implies -v)]'
'-u[do not buffer output]'
'-v[display non-printing chars as ^X or M-a]'
'(-)*:files:_files'
)
[[ $OSTYPE = freebsd* ]] && args+=(
'-l[set a lock on the stdout file descriptor]'
)
else
# POSIX reqires '-u', and most OSes may support '-n'
args=(
'-n[number all output lines]'
'-u[do not buffer output]'
'*:files:_files'
)
fi
_arguments -s -S : $args
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