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- TTTTTTTTYYYY((((1111)))) TTTTTTTTYYYY((((1111))))
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- NNNNAAAAMMMMEEEE
- tty - get the name of the terminal
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- ttttttttyyyy [ ----llll ] [ ----ssss ]
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- _t_t_y prints the path name of the user's terminal.
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- ----llll prints the synchronous line number to which the user's terminal is
- connected, if it is on an active synchronous line.
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- ----ssss inhibits printing of the terminal path name, allowing one to test
- just the exit code.
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- EXIT CODES
- 2 if invalid options were specified,
- 0 if standard input is a terminal,
- 1 otherwise.
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- DDDDIIIIAAAAGGGGNNNNOOOOSSSSTTTTIIIICCCCSSSS
- ``not on an active synchronous line'' if the standard input is not a
- synchronous terminal and ----llll is specified.
- ``not a tty'' if the standard input is not a terminal and ----ssss is not
- specified.
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- PPPPaaaaggggeeee 1111
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