JX(9.1) JX(9.1)
NAME
jx - 5620 execution and stdio interpreter
SYNOPSIS
jx file [ argument ... ]
DESCRIPTION
Jx downloads the program in file to the terminal or layer on
its controlling tty and runs it there, simulating standard
I/O functions of stdio(3). Jx works either stand-alone or in
a layer.
The stdout and stderr streams, if directed to the control-
ling terminal, will be squirreled away during execution and
copied to the terminal after the down-loaded program exits.
Programs to be run by jx should include <jerqio.h> and call
exit() upon termination in order to restart the default ter-
minal program. Programs to be run stand-alone should be
compiled with the -J option of 3cc(9.1). No special options
are required for running in a layer.
Stdio(3) functions available under jx are
getc putc fopen popen printf fread
getchar putchar freopen pclose sprintf fwrite
fgets puts fclose fprintf
fputs access
fflush
Unlike in stdio(3), getc and putc are functions, not macros.
Printf has only %d, %s, %c, %o, and %x. %u prints an
unsigned decimal number. %D prints an unsigned long decimal
number.
Since jx uses sendchar, sendnchars, and rcvchar, jx programs
should avoid these, and use only the standard I/O routines.
FILES
Stand-alone programs do not receive arguments.