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MINOR: halog: add some help on the command line
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@ -123,19 +123,58 @@ void filter_graphs(const char *accept_field, const char *time_field, struct time
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void filter_output_line(const char *accept_field, const char *time_field, struct timer **tptr);
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void filter_accept_holes(const char *accept_field, const char *time_field, struct timer **tptr);
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void die(const char *msg)
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void usage(FILE *output, const char *msg)
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{
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fprintf(stderr,
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fprintf(output,
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"%s"
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"Usage: halog [-q] [-c] [-v] {-gt|-pct|-st|-tc|-srv|-u|-uc|-ue|-ua|-ut|-uao|-uto}\n"
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"Usage: halog [-h|--help] for long help\n"
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" halog [-q] [-c] [-v] {-gt|-pct|-st|-tc|-srv|-u|-uc|-ue|-ua|-ut|-uao|-uto}\n"
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" [-s <skip>] [-e|-E] [-H] [-rt|-RT <time>] [-ad <delay>] [-ac <count>]\n"
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" [-Q|-QS] [-tcn|-TCN <termcode>] [ -hs|-HS [min][:[max]] ] < log\n"
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"\n",
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msg ? msg : ""
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);
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}
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void die(const char *msg)
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{
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usage(stderr, msg);
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exit(1);
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}
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void help()
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{
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usage(stdout, NULL);
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printf(
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"Input filters (several filters may be combined) :\n"
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" -H only match lines containing HTTP logs (ignore TCP)\n"
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" -E only match lines without any error (no 5xx status)\n"
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" -e only match lines with errors (status 5xx or negative)\n"
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" -rt|-RT <time> only match response times larger|smaller than <time>\n"
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" -Q|-QS only match queued requests (any queue|server queue)\n"
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" -tcn|-TCN <code> only match requests with/without termination code <code>\n"
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" -hs|-HS <[min][:][max]> only match requests with HTTP status codes within/not\n"
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" within min..max. Any of them may be omitted. Exact\n"
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" code is checked for if no ':' is specified.\n"
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"Modifiers\n"
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" -v invert the input filtering condition\n"
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" -q don't report errors/warnings\n"
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"\n"
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"Output filters - only one may be used at a time\n"
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" -c only report the number of lines that would have been printed\n"
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" -pct output connect and response times percentiles\n"
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" -st output number of requests per HTTP status code\n"
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" -tc output number of requests per termination code (2 chars)\n"
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" -srv output statistics per server (time, requests, errors)\n"
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" -u* output statistics per URL (time, requests, errors)\n"
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" Additional characters indicate the output sorting key :\n"
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" -u : by URL, -uc : request count, -ue : error count\n"
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" -ua : average response time, -uto : average total time\n"
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" -uao, -uto: average times computed on valid ('OK') requests\n"
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);
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exit(0);
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}
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/* return pointer to first char not part of current field starting at <p>. */
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@ -600,6 +639,8 @@ int main(int argc, char **argv)
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die("Fatal: missing output file name.\n");
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output_file = argv[1];
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}
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else if (strcmp(argv[0], "-h") == 0 || strcmp(argv[0], "--help") == 0)
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help();
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argc--;
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argv++;
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}
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