#cat for moonx

Support note (2026-09-05): this README is supplementary. The support record is the only capability authority; it separates native compatibility evidence from Wasm policy and smoke evidence. Options mentioned here but not promoted in that record are not compatibility guarantees.

Concatenate files or stdin to stdout, byte-transparently:

moonx cli/cat a.txt b.txt
printf '\x00\xff' | moonx cli/cat | moonx cli/xxd -p   # 00ff

Bytes pass through unmodified when no formatting option is selected. -n and -b number lines, -s squeezes repeated blank lines, and -A, -e, -E, -t, -T, and -v expose the common GNU visible-byte forms. Formatting state is continuous across file operands, including an unterminated line at a file boundary. Use - (or no argument) to read stdin. -u/--unbuffered is accepted as the GNU compatibility no-op; MoonBit writes through its byte stream without an additional user-space buffer.

With no file operand, the command silently reads stdin until EOF, matching the upstream terminal, pipe, redirection, and explicit - behavior.

Source Files

main.mbt

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