Find an available pseudo-tty
Synopsis:
#include <unix.h>
int openpty( int* amaster,
int* aslave,
char* name,
struct termios* termp,
struct winsize* winp );
Arguments:
- amaster
- A pointer to a location where openpty() can store the
file descriptor of the master side of the pseudo-tty.
- aslave
- A pointer to a location where openpty() can store the
file descriptor of the slave side of the pseudo-tty.
- name
- NULL, or a pointer to a buffer where openpty()
can store the filename of the slave side of the pseudo-tty.
- termp
- NULL, or a pointer to a
termios
structure that describes the terminal's control attributes to apply to
the slave side of the pseudo-tty.
- winp
- A pointer to a winsize structure that defines the
window size to use for the slave side of the pseudo-tty.
Library:
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
Note:
This function is in libc.a, but not in libc.so
(in order to save space).
Description:
The openpty() function finds and opens an available pseudo-tty.
Returns:
- 0
- Success.
- -1
- An error occurred
(errno is set).
Errors:
- ENOENT
- There are no ttys available.
Classification:
Unix
| Safety: |
|
|---|
| Cancellation point |
Yes |
| Interrupt handler |
No |
| Signal handler |
Yes |
| Thread |
Yes |