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89e45c9b7f
sys_curses/system.c: Don't use gets() better. Neither gets() nor fgets() is appropriate for discarding a line of input.
142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/*-
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)system.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#include <stdio.h>
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#include "../general/general.h"
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#include "../ctlr/api.h"
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#include "spint.h"
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#include "../general/globals.h"
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static Spint spinted;
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static char command[256];
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static int need_to_start = 0;
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/*
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* shell_continue() actually runs the command, and looks for API
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* requests coming back in.
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*
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* We are called from the main loop in telnet.c.
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*/
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int
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shell_continue()
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{
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/*
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* spint_start() returns when either the command has finished, or when
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* the required interrupt comes in. In the latter case, the appropriate
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* thing to do is to process the interrupt, and then return to
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* the interrupt issuer by calling spint_continue().
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*/
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if (need_to_start) {
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need_to_start = 0;
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spint_start(command, &spinted);
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}
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if (spinted.done == 0) {
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/* Process request */
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handle_api(&spinted.regs, &spinted.sregs);
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spint_continue(&spinted);
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} else {
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int ch;
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if (spinted.rc != 0) {
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fprintf(stderr, "Process generated a return code of 0x%x.\n",
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spinted.rc);
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}
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printf("[Hit return to continue]");
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fflush(stdout);
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while ((ch = getchar()) != '\n' && ch != EOF)
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;
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shell_active = 0;
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setconnmode();
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ConnectScreen();
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}
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return shell_active;
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}
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/*
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* Called from telnet.c to fork a lower command.com. We
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* use the spint... routines so that we can pick up
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* interrupts generated by application programs.
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*/
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int
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shell(argc,argv)
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int argc;
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char *argv[];
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{
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ClearElement(spinted);
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spinted.int_no = API_INTERRUPT_NUMBER;
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if (argc == 1) {
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command[0] = 0;
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} else {
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char *cmdptr;
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int length;
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argc--;
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argv++;
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strcpy(command, " /c");
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cmdptr = command+strlen(command);
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while (argc) {
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if ((cmdptr+strlen(*argv)) >= (command+sizeof command)) {
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fprintf(stderr, "Argument list too long at argument *%s*.\n",
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*argv);
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return 0;
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}
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*cmdptr++ = ' '; /* Blank separators */
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strcpy(cmdptr, *argv);
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cmdptr += strlen(cmdptr);
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argc--;
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argv++;
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}
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length = strlen(command)-1;
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if (length < 0) {
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length = 0;
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}
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command[0] = length;
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}
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need_to_start = 1;
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shell_active = 1;
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return 1; /* Go back to main loop */
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}
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