JX(9.1) JX(9.1)
NAME
jx - jerq execution and stdio interpreter
SYNOPSIS
jx file [ arguments ]
DESCRIPTION
Jx downloads the program in file to the jerq 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.
Stdout and stderr, if directed to the controlling terminal,
will be squirreled away during execution to be cat'ed after
the terminal program has been rebooted.
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 functions available under jx are
getc putc fopen popen printf fread
getchar putchar freopen pclosesprintffwrite
fgets puts fclose fprintf
fputs access
fflush
Unlike in stdio(3S), getc and putc are functions, not mac-
ros. 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
/usr/jerq/include/jerqio.h
/usr/jerq/lib/sysint standard I/O interpreter
$HOME/.jxout saved standard output
$HOME/.jxerr saved standard diagnostic output
SEE ALSO
request(9.2)
BUGS
Keyboard standard input doesn't work; use kbdchar(9.2).
Stand-alone programs do not receive arguments.
JX(9.1) JX(9.1)