initkeyboard, ctlkeyboard, closekeyboard – keyboard control|
Keyboardctl *initkeyboard(char *file)
int ctlkeyboard(Keyboardctl *kc, char *msg)
void closekeyboard(Keyboard *kc)
These functions access and control a keyboard interface for character-at-a-time
I/O in a multi-threaded environment, usually in combination with
mouse(3). They use the message-passing Channel interface in the
threads library (see thread(3)); programs that wish a more event-driven,
single-threaded approach should use event(3).
Initkeyboard opens a connection to the keyboard and returns a
The argument to initkeyboard is ignored (on Plan 9, it is the
name of the keyboard device).
Once the Keyboardctl is set up a message containing a Rune will
be sent on the Channel Keyboardctl.c to report each character
read from the device.
Ctlkeyboard is used to set the state of the interface, typically
to turn raw mode on and off. It writes the string msg to the control
file associated with the device, which is assumed to be the regular
device file name with the string ctl appended.
Closekeyboard closes the file descriptors associated with the
keyboard, kills the slave processes, and frees the Keyboardctl
typedef struct Keyboardct Keyboardctl;|
Channel *c; /* chan(Rune) */|
int consfd; /* to cons file */
int ctlfd; /* to ctl file */
int pid; /* of slave proc */
Because the interface delivers complete runes, there is no way
to report lesser actions such as shift keys or even individual