FreeCalypso > hg > freecalypso-tools

annotate rvinterf/etmsync/help.c @ 296:77d561735b07

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c1xx-calextr: preparations for both ASCII and binary output
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 18 Nov 2017 17:30:26 +0000
parents 24cb10d508d7
children
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27
24cb10d508d7 fc-fsio help command implemented
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1 /*
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2 * This module implements the fc-fsio help facility.
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3 */
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4
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5 #include <stdio.h>
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6 #include <ctype.h>
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7 #include <string.h>
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8 #include <strings.h>
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9 #include <stdlib.h>
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10 #include "exitcodes.h"
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11
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12 extern char help_file_pathname[];
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13
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14 show_help_topic(topic)
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15 char *topic;
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16 {
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17 FILE *f;
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18 char linebuf[256];
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19 char *cp, *np;
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20 int flag;
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21
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22 f = fopen(help_file_pathname, "r");
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23 if (!f) {
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24 perror(help_file_pathname);
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25 return(ERROR_UNIX);
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26 }
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27 for (;;) {
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28 if (!fgets(linebuf, sizeof linebuf, f)) {
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29 fprintf(stderr, "Help topic \"%s\" not found\n", topic);
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30 fclose(f);
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31 return(ERROR_USAGE);
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32 }
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33 if (linebuf[0] != '=' || linebuf[1] != '=' || linebuf[2] != '=')
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34 continue;
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35 for (cp = linebuf + 3; isspace(*cp); cp++)
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36 ;
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37 for (np = cp; *cp && !isspace(*cp); cp++)
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38 ;
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39 if (*cp)
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40 *cp++ = '\0';
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41 if (!strcmp(np, topic))
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42 break;
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43 }
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44 for (flag = 0; fgets(linebuf, sizeof linebuf, f); ) {
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45 if (linebuf[0] == '=' && linebuf[1] == '=' &&
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46 linebuf[2] == '=') {
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47 if (flag)
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48 break;
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49 else
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50 continue;
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51 }
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52 fputs(linebuf, stdout);
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53 flag = 1;
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54 }
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55 fclose(f);
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56 return(0);
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57 }
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58
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59 cmd_help(argc, argv)
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60 char **argv;
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61 {
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62 switch (argc) {
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63 case 1:
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64 return show_help_topic("main");
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65 case 2:
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66 return show_help_topic(argv[1]);
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67 default:
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68 fprintf(stderr, "internal error in cmd_help(): bad argc\n");
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69 abort();
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70 }
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71 }