9.42 openpty ¶

int openty(int ptys[2]);

This syscalls creates a pair of pseudoterminals and returns the registered file descriptors in ptys. Index 0 is the primary end (also known as master), 1 is the secondary end (also known as slave).

The syscall returns 0 on success and -1 on failure, with the following errno:

• EFAULT: ptys points to bogus memory.
• EMFILE: No available file descriptor slots.