[unix-history] / usr / src / usr.bin / tn3270 / distribution / sys_dos / system.c

/*
 *	Copyright (c) 1984-1987 by the Regents of the
 *	University of California and by Gregory Glenn Minshall.
 *
 *	Permission to use, copy, modify, and distribute these
 *	programs and their documentation for any purpose and
 *	without fee is hereby granted, provided that this
 *	copyright and permission appear on all copies and
 *	supporting documentation, the name of the Regents of
 *	the University of California not be used in advertising
 *	or publicity pertaining to distribution of the programs
 *	without specific prior permission, and notice be given in
 *	supporting documentation that copying and distribution is
 *	by permission of the Regents of the University of California
 *	and by Gregory Glenn Minshall.  Neither the Regents of the
 *	University of California nor Gregory Glenn Minshall make
 *	representations about the suitability of this software
 *	for any purpose.  It is provided "as is" without
 *	express or implied warranty.
 */

#ifndef lint
static char sccsid[] = "@(#)system.c	1.6 (Berkeley) %G%";
#endif	/* not lint */

#include <stdio.h>

#include "../general/general.h"
#include "../ctlr/api.h"
#include "spint.h"

#include "../general/globals.h"


static Spint spinted;
static char command[256];
static int need_to_start = 0;

/*
 * shell_continue() actually runs the command, and looks for API
 * requests coming back in.
 *
 * We are called from the main loop in telnet.c.
 */

int
shell_continue()
{
    /*
     * spint_start() returns when either the command has finished, or when
     * the required interrupt comes in.  In the latter case, the appropriate
     * thing to do is to process the interrupt, and then return to
     * the interrupt issuer by calling spint_continue().
     */
    if (need_to_start) {
	need_to_start = 0;
	spint_start(command, &spinted);
    }

    if (spinted.done == 0) {
	/* Process request */
	handle_api(&spinted.regs, &spinted.sregs);
	spint_continue(&spinted);
    } else {
	char inputbuffer[100];

	if (spinted.rc != 0) {
	    fprintf(stderr, "Process generated a return code of 0x%x.\n",
								spinted.rc);
	}
	printf("[Hit return to continue]");
	fflush(stdout);
	(void) gets(inputbuffer);
	shell_active = 0;
	setconnmode();
	ConnectScreen();
    }
    return shell_active;
}


/*
 * Called from telnet.c to fork a lower command.com.  We
 * use the spint... routines so that we can pick up
 * interrupts generated by application programs.
 */


int
shell(argc,argv)
int	argc;
char	*argv[];
{

    ClearElement(spinted);
    spinted.int_no = API_INTERRUPT_NUMBER;
    if (argc == 1) {
	command[0] = 0;
    } else {
	char *cmdptr;
	int length;

	argc--;
	argv++;
	strcpy(command, " /c");
	cmdptr = command+strlen(command);
	while (argc) {
	    if ((cmdptr+strlen(*argv)) >= (command+sizeof command)) {
		fprintf(stderr, "Argument list too long at argument *%s*.\n",
			    *argv);
		return 0;
	    }
	    *cmdptr++ = ' ';		/* Blank separators */
	    strcpy(cmdptr, *argv);
	    cmdptr += strlen(cmdptr);
	    argc--;
	    argv++;
	}
	length = strlen(command)-1;
	if (length < 0) {
	    length = 0;
	}
	command[0] = length;
    }
    need_to_start = 1;
    shell_active = 1;
    return 1;			/* Go back to main loop */
}
Commit	Line	Data
992de934 GM	1	/*
	2	* Copyright (c) 1984-1987 by the Regents of the
	3	* University of California and by Gregory Glenn Minshall.
	4	*
	5	* Permission to use, copy, modify, and distribute these
	6	* programs and their documentation for any purpose and
	7	* without fee is hereby granted, provided that this
	8	* copyright and permission appear on all copies and
	9	* supporting documentation, the name of the Regents of
	10	* the University of California not be used in advertising
	11	* or publicity pertaining to distribution of the programs
	12	* without specific prior permission, and notice be given in
	13	* supporting documentation that copying and distribution is
	14	* by permission of the Regents of the University of California
	15	* and by Gregory Glenn Minshall. Neither the Regents of the
	16	* University of California nor Gregory Glenn Minshall make
	17	* representations about the suitability of this software
	18	* for any purpose. It is provided "as is" without
	19	* express or implied warranty.
	20	*/
	21
	22	#ifndef lint
	23	static char sccsid[] = "@(#)system.c 1.6 (Berkeley) %G%";
	24	#endif /* not lint */
	25
190c655a GM	26	#include <stdio.h>
190c655a GM	27
f478095f	28	#include "../general/general.h"
4718d085	29	#include "../ctlr/api.h"
190c655a GM	30	#include "spint.h"
190c655a GM	31
9563b3d1 GM	32	#include "../general/globals.h"
	33
	34
	35	static Spint spinted;
	36	static char command[256];
	37	static int need_to_start = 0;
	38
	39	/*
	40	* shell_continue() actually runs the command, and looks for API
	41	* requests coming back in.
	42	*
	43	* We are called from the main loop in telnet.c.
	44	*/
	45
	46	int
	47	shell_continue()
	48	{
	49	/*
	50	* spint_start() returns when either the command has finished, or when
	51	* the required interrupt comes in. In the latter case, the appropriate
	52	* thing to do is to process the interrupt, and then return to
	53	* the interrupt issuer by calling spint_continue().
	54	*/
	55	if (need_to_start) {
	56	need_to_start = 0;
	57	spint_start(command, &spinted);
	58	}
	59
	60	if (spinted.done == 0) {
	61	/* Process request */
	62	handle_api(&spinted.regs, &spinted.sregs);
	63	spint_continue(&spinted);
	64	} else {
34987061 GM	65	char inputbuffer[100];
34987061 GM	66
9563b3d1 GM	67	if (spinted.rc != 0) {
	68	fprintf(stderr, "Process generated a return code of 0x%x.\n",
	69	spinted.rc);
	70	}
34987061 GM	71	printf("[Hit return to continue]");
	72	fflush(stdout);
	73	(void) gets(inputbuffer);
9563b3d1	74	shell_active = 0;
34987061 GM	75	setconnmode();
34987061 GM	76	ConnectScreen();
9563b3d1 GM	77	}
	78	return shell_active;
	79	}
190c655a GM	80
	81
	82	/*
	83	* Called from telnet.c to fork a lower command.com. We
	84	* use the spint... routines so that we can pick up
	85	* interrupts generated by application programs.
	86	*/
	87
	88
	89	int
	90	shell(argc,argv)
	91	int argc;
	92	char *argv[];
	93	{
190c655a GM	94
	95	ClearElement(spinted);
	96	spinted.int_no = API_INTERRUPT_NUMBER;
	97	if (argc == 1) {
	98	command[0] = 0;
	99	} else {
	100	char *cmdptr;
	101	int length;
	102
	103	argc--;
	104	argv++;
	105	strcpy(command, " /c");
	106	cmdptr = command+strlen(command);
	107	while (argc) {
	108	if ((cmdptr+strlen(*argv)) >= (command+sizeof command)) {
	109	fprintf(stderr, "Argument list too long at argument %s.\n",
	110	*argv);
	111	return 0;
	112	}
	113	cmdptr++ = ' '; / Blank separators */
	114	strcpy(cmdptr, *argv);
	115	cmdptr += strlen(cmdptr);
	116	argc--;
	117	argv++;
	118	}
	119	length = strlen(command)-1;
	120	if (length < 0) {
	121	length = 0;
	122	}
	123	command[0] = length;
	124	}
9563b3d1 GM	125	need_to_start = 1;
	126	shell_active = 1;
	127	return 1; /* Go back to main loop */
190c655a	128	}