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15 lines
489 B
Text
15 lines
489 B
Text
\section isatty isatty - test if the specified file descriptor is a tty
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\subsection isatty-synopsis Synopsis
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<tt>isatty [FILE DESCRIPTOR]</tt>
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\subsection isatty-description Description
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The <tt>isatty</tt> command is used to test if a file descriptor is a tty.
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FILE DESCRIPTOR may be either the number of a file descriptor, or one of the
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strings stdin, stdout and stderr.
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If the specified file descriptor is a tty, the exit status of the command is
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zero, otherwise, it is non-zero.
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