RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-10-31 08:22:45 +00:00
Code Issues Activity Actions
serenity/Base/usr/share/man/man3/isatty.md
Andreas Kling 70e220a81f Docs: Add note about EINVAL to isatty(3)
2019-11-17 20:09:12 +01:00

547 B
Raw Blame History

Name

isatty - check if a file descriptor is a TTY

Synopsis

#include <unistd.h>

int isatty(int fd);

Description

Checks if the device inside a given file descriptor is a TTY device.

Return value

If fd refers to a TTY device, returns 1. Otherwise, returns 0 and errno is set to describe the error.

Errors

  • 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.