/**
 * Stand in for one raw output byte inside a text string.
 *
 * `\xHH` and `\NNN` name a byte, not a code point: bash writes `\xff` as
 * the single byte 0xFF, which is not valid UTF-8 on its own and so has no
 * character to stand for it. A byte above ASCII is therefore carried as
 * its surrogate escape, the same convention Python's own filesystem paths
 * use, and `encodeText` turns it back into that byte.
 *
 * Three octal digits reach past one byte (`\400` is 256, `\777` is 511)
 * and bash writes the low byte of those, so the value is masked rather
 * than refused.
 */
export declare function byteChar(value: number): string;
/**
 * Encode shell text for output, byte escapes included.
 *
 * Every place the shell turns its own text into bytes goes through here,
 * because a string that reached it from `byteChar` holds a lone surrogate
 * that `TextEncoder` would write as U+FFFD.
 */
export declare function encodeText(text: string): Uint8Array;
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