Commit | Line | Data |
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190c655a GM |
1 | #include <stdio.h> |
2 | ||
f478095f | 3 | #include "../general/general.h" |
190c655a GM |
4 | #include "../api/api.h" |
5 | #include "spint.h" | |
6 | ||
7 | ||
8 | ||
9 | /* | |
10 | * Called from telnet.c to fork a lower command.com. We | |
11 | * use the spint... routines so that we can pick up | |
12 | * interrupts generated by application programs. | |
13 | */ | |
14 | ||
15 | ||
16 | int | |
17 | shell(argc,argv) | |
18 | int argc; | |
19 | char *argv[]; | |
20 | { | |
21 | Spint spinted; | |
22 | char command[256]; | |
23 | ||
24 | ClearElement(spinted); | |
25 | spinted.int_no = API_INTERRUPT_NUMBER; | |
26 | if (argc == 1) { | |
27 | command[0] = 0; | |
28 | } else { | |
29 | char *cmdptr; | |
30 | int length; | |
31 | ||
32 | argc--; | |
33 | argv++; | |
34 | strcpy(command, " /c"); | |
35 | cmdptr = command+strlen(command); | |
36 | while (argc) { | |
37 | if ((cmdptr+strlen(*argv)) >= (command+sizeof command)) { | |
38 | fprintf(stderr, "Argument list too long at argument *%s*.\n", | |
39 | *argv); | |
40 | return 0; | |
41 | } | |
42 | *cmdptr++ = ' '; /* Blank separators */ | |
43 | strcpy(cmdptr, *argv); | |
44 | cmdptr += strlen(cmdptr); | |
45 | argc--; | |
46 | argv++; | |
47 | } | |
48 | length = strlen(command)-1; | |
49 | if (length < 0) { | |
50 | length = 0; | |
51 | } | |
52 | command[0] = length; | |
53 | } | |
54 | ||
55 | /* | |
56 | * spint_start() returns when either the command has finished, or when | |
57 | * the required interrupt comes in. In the latter case, the appropriate | |
58 | * thing to do is to process the interrupt, and then return to | |
59 | * the interrupt issuer by calling spint_continue(). | |
60 | */ | |
61 | spint_start(command, &spinted); | |
62 | while (spinted.done == 0) { | |
63 | /* Process request */ | |
64 | handle_api(&spinted.regs, &spinted.sregs); | |
65 | spint_continue(&spinted); | |
66 | } | |
67 | if (spinted.rc != 0) { | |
68 | fprintf(stderr, "Process generated a return code of 0x%x.\n", | |
69 | spinted.rc); | |
70 | } | |
71 | return 0; | |
72 | } |