1 /*-
2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char sccsid[] = "@(#)system.c 8.1 (Berkeley) 06/06/93";
10 #endif /* not lint */
11
12 #include <stdio.h>
13
14 #include "../general/general.h"
15 #include "../ctlr/api.h"
16 #include "spint.h"
17
18 #include "../general/globals.h"
19
20
21 static Spint spinted;
22 static char command[256];
23 static int need_to_start = 0;
24
25 /*
26 * shell_continue() actually runs the command, and looks for API
27 * requests coming back in.
28 *
29 * We are called from the main loop in telnet.c.
30 */
31
32 int
shell_continue()33 shell_continue()
34 {
35 /*
36 * spint_start() returns when either the command has finished, or when
37 * the required interrupt comes in. In the latter case, the appropriate
38 * thing to do is to process the interrupt, and then return to
39 * the interrupt issuer by calling spint_continue().
40 */
41 if (need_to_start) {
42 need_to_start = 0;
43 spint_start(command, &spinted);
44 }
45
46 if (spinted.done == 0) {
47 /* Process request */
48 handle_api(&spinted.regs, &spinted.sregs);
49 spint_continue(&spinted);
50 } else {
51 char inputbuffer[100];
52
53 if (spinted.rc != 0) {
54 fprintf(stderr, "Process generated a return code of 0x%x.\n",
55 spinted.rc);
56 }
57 printf("[Hit return to continue]");
58 fflush(stdout);
59 (void) gets(inputbuffer);
60 shell_active = 0;
61 setconnmode();
62 ConnectScreen();
63 }
64 return shell_active;
65 }
66
67
68 /*
69 * Called from telnet.c to fork a lower command.com. We
70 * use the spint... routines so that we can pick up
71 * interrupts generated by application programs.
72 */
73
74
75 int
shell(argc,argv)76 shell(argc,argv)
77 int argc;
78 char *argv[];
79 {
80
81 ClearElement(spinted);
82 spinted.int_no = API_INTERRUPT_NUMBER;
83 if (argc == 1) {
84 command[0] = 0;
85 } else {
86 char *cmdptr;
87 int length;
88
89 argc--;
90 argv++;
91 strcpy(command, " /c");
92 cmdptr = command+strlen(command);
93 while (argc) {
94 if ((cmdptr+strlen(*argv)) >= (command+sizeof command)) {
95 fprintf(stderr, "Argument list too long at argument *%s*.\n",
96 *argv);
97 return 0;
98 }
99 *cmdptr++ = ' '; /* Blank separators */
100 strcpy(cmdptr, *argv);
101 cmdptr += strlen(cmdptr);
102 argc--;
103 argv++;
104 }
105 length = strlen(command)-1;
106 if (length < 0) {
107 length = 0;
108 }
109 command[0] = length;
110 }
111 need_to_start = 1;
112 shell_active = 1;
113 return 1; /* Go back to main loop */
114 }
115