.TH JX 9.1 .CT 1 comm_term .SH NAME jx \- 5620 execution and stdio interpreter .SH SYNOPSIS .B jx .I file [ .I argument ... ] .SH DESCRIPTION .I Jx downloads the program in .I file to the terminal or layer on its controlling tty and runs it there, simulating standard I/O functions of .IR stdio (3). .I Jx works either stand-alone or in a layer. .PP The .B stdout and .B stderr streams, if directed to the controlling terminal, will be squirreled away during execution and copied to the terminal after the down-loaded program exits. .PP Programs to be run by .I jx should include .B <jerqio.h> and call .B exit() upon termination in order to restart the default terminal program. Programs to be run stand-alone should be compiled with the .B -J option of .IR 3cc (9.1). No special options are required for running in a layer. .PP .IR Stdio (3) functions available under .I jx are .IP .EX .nr f \w'freopen ' .ta +\nfu +\nfu +\nfu +\nfu +\nfu getc putc fopen popen printf fread getchar putchar freopen pclose sprintf fwrite fgets puts fclose fprintf fputs access fflush .EE .PP Unlike in .IR stdio (3), .I getc and .I putc are functions, not macros. .I Printf has only .BR %d , .BR %s, .BR %c, .BR %o , and .BR %x. .B %u prints an unsigned decimal number. .B %D prints an unsigned long decimal number. .PP Since .I jx uses .IR sendchar , .IR sendnchars , and .IR rcvchar , .I jx programs should avoid these, and use only the standard I/O routines. .SH FILES .TF /usr/jerq/include/blitio.h .TP .F /usr/jerq/include/jerqio.h .TP .F /usr/jerq/lib/sysint standard I/O interpreter .TP .F $HOME/.jxout saved standard output .TP .F $HOME/.jxerr saved standard diagnostic output .SH SEE ALSO .IR request (9.2), .IR stdio (3) .SH BUGS Keyboard standard input doesn't work; use .IR kbdchar ; see .IR request (9.2). .br Stand-alone programs do not receive arguments.