FreeCalypso > hg > freecalypso-tools
annotate loadtools/lthelp.c @ 766:78101799417c
doc/DUART28-boot-control: update for current patch situation
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 02 Feb 2021 05:16:01 +0000 |
parents | e7502631a0f9 |
children | 464a531122ab |
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1 /* |
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2 * This module implements the loadtool 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 |
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11 extern char loadtool_help_file[]; |
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12 |
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13 loadtool_help(topic) |
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14 char *topic; |
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15 { |
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16 FILE *f; |
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17 char linebuf[256]; |
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18 char *cp, *np; |
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19 int flag; |
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20 |
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21 f = fopen(loadtool_help_file, "r"); |
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22 if (!f) { |
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23 perror(loadtool_help_file); |
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24 return(-1); |
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25 } |
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26 for (;;) { |
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27 if (!fgets(linebuf, sizeof linebuf, f)) { |
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28 fprintf(stderr, "Help topic \"%s\" not found\n", topic); |
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29 fclose(f); |
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30 return(-1); |
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31 } |
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32 if (linebuf[0] != '=' || linebuf[1] != '=' || linebuf[2] != '=') |
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33 continue; |
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34 for (cp = linebuf + 3; isspace(*cp); cp++) |
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35 ; |
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36 for (np = cp; *cp && !isspace(*cp); cp++) |
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37 ; |
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38 if (*cp) |
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39 *cp++ = '\0'; |
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40 if (!strcmp(np, topic)) |
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41 break; |
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42 } |
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43 for (flag = 0; fgets(linebuf, sizeof linebuf, f); ) { |
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44 if (linebuf[0] == '=' && linebuf[1] == '=' && |
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45 linebuf[2] == '=') { |
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46 if (flag) |
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47 break; |
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48 else |
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49 continue; |
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50 } |
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51 fputs(linebuf, stdout); |
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52 flag = 1; |
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53 } |
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54 fclose(f); |
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55 return(0); |
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56 } |
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57 |
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58 cmd_help(argc, argv) |
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59 char **argv; |
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60 { |
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61 char flashtopic[32]; |
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62 |
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63 switch (argc) { |
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64 case 1: |
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65 return loadtool_help("main"); |
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66 case 2: |
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67 return loadtool_help(argv[1]); |
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68 case 3: |
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69 if ((!strcmp(argv[1], "flash") || !strcmp(argv[1], "flash2")) |
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70 && strlen(argv[2]) <= 20) { |
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71 sprintf(flashtopic, "flash:%s", argv[2]); |
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72 return loadtool_help(flashtopic); |
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73 } |
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74 fprintf(stderr, "No such help topic\n"); |
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75 return(-1); |
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76 default: |
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77 fprintf(stderr, "internal error in cmd_help(): bad argc\n"); |
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78 abort(); |
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79 } |
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80 } |