FreeCalypso > hg > freecalypso-tools

annotate rvinterf/old/g23sh/usercmd.c @ 926:6a0aa8d36d06

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rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents e7502631a0f9
children
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0
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1 /*
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2 * This module implements g23sh user command dispatch.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <ctype.h>
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7 #include <stdio.h>
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8 #include <string.h>
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9 #include <strings.h>
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10 #include <stdlib.h>
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11
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12 extern char usercmd[];
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13
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14 extern void cmd_sendsp();
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15
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16 void
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17 cmd_exit()
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18 {
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19 tty_cleanup();
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20 exit(0);
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21 }
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22
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23 static struct cmdtab {
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24 char *cmd;
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25 int minargs;
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26 int maxargs;
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27 void (*func)();
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28 } cmdtab[] = {
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29 {"exit", 0, 0, cmd_exit},
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30 {"quit", 0, 0, cmd_exit},
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31 {"sp", 2, 2, cmd_sendsp},
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32 {0, 0, 0, 0}
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33 };
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34
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35 void
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36 dispatch_user_cmd()
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37 {
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38 char *argv[10];
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39 char *cp, **ap;
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40 struct cmdtab *tp;
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41
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42 for (cp = usercmd; isspace(*cp); cp++)
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43 ;
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44 if (!*cp || *cp == '#')
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45 return;
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46 argv[0] = cp;
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47 while (*cp && !isspace(*cp))
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48 cp++;
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49 if (*cp)
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50 *cp++ = '\0';
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51 for (tp = cmdtab; tp->cmd; tp++)
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52 if (!strcmp(tp->cmd, argv[0]))
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53 break;
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54 if (!tp->func) {
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55 printf("error: no such command\n");
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56 return;
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57 }
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58 for (ap = argv + 1; ; ) {
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59 while (isspace(*cp))
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60 cp++;
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61 if (!*cp || *cp == '#')
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62 break;
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63 if (ap - argv - 1 >= tp->maxargs) {
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64 printf("error: too many arguments\n");
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65 return;
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66 }
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67 if (*cp == '"') {
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68 *ap++ = ++cp;
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69 while (*cp && *cp != '"')
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70 cp++;
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71 if (*cp != '"') {
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72 printf("error: unterminated quoted string\n");
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73 return;
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74 }
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75 *cp++ = '\0';
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76 } else {
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77 *ap++ = cp;
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78 while (*cp && !isspace(*cp))
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79 cp++;
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80 if (*cp)
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81 *cp++ = '\0';
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82 }
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83 }
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84 if (ap - argv - 1 < tp->minargs) {
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85 printf("error: too few arguments\n");
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86 return;
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87 }
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88 *ap = 0;
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89 tp->func(ap - argv, argv);
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90 }