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Docs: Add note about EINVAL to isatty(3)

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Andreas Kling 2019-11-17 20:09:12 +01:00
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Base/usr/share/man/man3/isatty.md
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@ -22,3 +22,4 @@ If `fd` refers to a TTY device, returns 1. Otherwise, returns 0 and `errno` is s
* `EBADF`: `fd` is not an open file descriptor.
* `ENOTTY`: `fd` refers to something that's not a TTY device.
* `EINVAL`: `fd` refers to something that supports `ioctl()`, but is still not a TTY device.