FreeCalypso > hg > freecalypso-tools

annotate loadtools/lthelp.c @ 619:f82551c77e58

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libserial-newlnx: ASYNC_LOW_LATENCY patch reverted Reports from Das Signal indicate that loadtools performance on Debian is about the same as on Slackware, and that including or omitting the ASYNC_LOW_LATENCY patch from Serg makes no difference. Because the patch in question does not appear to be necessary, it is being reverted until and unless someone other than Serg reports an actual real-world system on which loadtools operation times are slowed compared to the Mother's Slackware reference and on which Slackware-like performance can be restored by setting the ASYNC_LOW_LATENCY flag.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 27 Feb 2020 01:09:48 +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 }