FreeCalypso > hg > freecalypso-tools

comparison rvinterf/old/g23sh/usercmd.c @ 0:e7502631a0f9

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initial import from freecalypso-sw rev 1033:5ab737ac3ad7
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Jun 2016 00:13:35 +0000
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-1:000000000000 0:e7502631a0f9
1 /*
2 * This module implements g23sh user command dispatch.
3 */
4
5 #include <sys/types.h>
6 #include <ctype.h>
7 #include <stdio.h>
8 #include <string.h>
9 #include <strings.h>
10 #include <stdlib.h>
11
12 extern char usercmd[];
13
14 extern void cmd_sendsp();
15
16 void
17 cmd_exit()
18 {
19 tty_cleanup();
20 exit(0);
21 }
22
23 static struct cmdtab {
24 char *cmd;
25 int minargs;
26 int maxargs;
27 void (*func)();
28 } cmdtab[] = {
29 {"exit", 0, 0, cmd_exit},
30 {"quit", 0, 0, cmd_exit},
31 {"sp", 2, 2, cmd_sendsp},
32 {0, 0, 0, 0}
33 };
34
35 void
36 dispatch_user_cmd()
37 {
38 char *argv[10];
39 char *cp, **ap;
40 struct cmdtab *tp;
41
42 for (cp = usercmd; isspace(*cp); cp++)
43 ;
44 if (!*cp || *cp == '#')
45 return;
46 argv[0] = cp;
47 while (*cp && !isspace(*cp))
48 cp++;
49 if (*cp)
50 *cp++ = '\0';
51 for (tp = cmdtab; tp->cmd; tp++)
52 if (!strcmp(tp->cmd, argv[0]))
53 break;
54 if (!tp->func) {
55 printf("error: no such command\n");
56 return;
57 }
58 for (ap = argv + 1; ; ) {
59 while (isspace(*cp))
60 cp++;
61 if (!*cp || *cp == '#')
62 break;
63 if (ap - argv - 1 >= tp->maxargs) {
64 printf("error: too many arguments\n");
65 return;
66 }
67 if (*cp == '"') {
68 *ap++ = ++cp;
69 while (*cp && *cp != '"')
70 cp++;
71 if (*cp != '"') {
72 printf("error: unterminated quoted string\n");
73 return;
74 }
75 *cp++ = '\0';
76 } else {
77 *ap++ = cp;
78 while (*cp && !isspace(*cp))
79 cp++;
80 if (*cp)
81 *cp++ = '\0';
82 }
83 }
84 if (ap - argv - 1 < tp->minargs) {
85 printf("error: too few arguments\n");
86 return;
87 }
88 *ap = 0;
89 tp->func(ap - argv, argv);
90 }