JIOCTL(9.4) JIOCTL(9.4)
NAME
jioctl - jerq ioctl requests
SYNOPSIS
#include /usr/jerq/include/jioctl.h
ioctl(fd, JMUX, 0)
ioctl(fd, request, win)
struct winsize *win;
DESCRIPTION
Mux(9.1) supports several jerq-specific ioctl(2) requests
for Unix programs attached to layers. The requests are:
312144.if 408.sp40u
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 termi-
nal 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 argu-
ment, a structure describing the size of the layer con-
nected to fd. 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)