JIOCTL(9.4) JIOCTL(9.4)
NAME
jioctl - mux ioctl requests
SYNOPSIS
#include "/usr/jerq/include/jioctl.h"
ioctl(fd, request, 0)
ioctl(fd, JWINSIZE, win)
struct winsize *win;
DESCRIPTION
Mux(9.1) supports several ioctl(2) requests for Unix pro-
grams attached to layers. The requests are:
JMUX returns 0 if file descriptor fd is connected to a mux
layer, -1 otherwise.
JTERM resets the layer connected to fd to the default ter-
minal program.
JBOOT initiates the down-load protocol to replace the
layer's terminal program. Usually called by
32ld(9.1).
JZOMBOOT
is the same as JBOOT, but disables execution of the
program when the download is complete (see the -z
flag of 32ld).
JWINSIZE
returns, in the location pointed to by the third
argument, a structure describing the size of the
layer connected to fd, with character `0' being the
unit of size. The structure is:
struct winsize {
char bytesx, bytesy; /* size in characters */
short bitsx, bitsy; /* size in pixels */
};
JEXIT causes mux to exit.
SEE ALSO
32ld(9.1), mux(9.1), ioctl(2)