src/collectl2pcp/pmdesc.c

   1 /*
   2  * Copyright (c) 2013-2015 Red Hat Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 2 of the License, or (at your
   7  * option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  *
  15  * Lookup up the metrics named on stdin and generate pmDesc descriptors.
  16  * Mark Goodwin <mgoodwin@redhat.com> May 2013.
  17  */
  18
  19 #include <pcp/pmapi.h>
  20 #include <pcp/impl.h>
  21 #include <pcp/pmda.h>
  22
  23 static char *semStr[] = { "0", "PM_SEM_COUNTER", "2", "PM_SEM_INSTANT", "PM_SEM_DISCRETE" };
  24
  25 static char *
  26 indomStr(int indom)
  27 {
  28     static char buf[16];
  29
  30     if (indom == PM_INDOM_NULL)
  31         strcpy(buf, "PM_INDOM_NULL");
  32     else
  33         sprintf(buf, "0x%04x", indom);
  34
  35     return buf;
  36 }
  37
  38 int
  39 main(int argc, char *argv[])
  40 {
  41     int ctx;
  42     int sts;
  43     char buf[1024];
  44     char *name = buf;
  45     char *p;
  46     pmID pmid;
  47     pmDesc desc;
  48
  49     if (isatty(fileno(stdin))) {
  50         fprintf(stderr,
  51             "Usage: pminfo metric ... | pmdesc\n\n"
  52             "Reads metric names on stdin and prints a descriptor for each in a table.\n"
  53             "The metric descriptor table should be defined in \"./metrics.h\" as follows :\n"
  54             "    typedef struct {\n"
  55             "        char *name;\n"
  56             "        pmDesc desc;\n"
  57             "    } metric_t;\n"
  58             "\n"
  59             "    extern metric_t metrics[];\n");
  60         exit(1);
  61     }
  62
  63     ctx = pmNewContext(PM_CONTEXT_HOST, "local:");
  64     if (ctx < 0) {
  65         fprintf(stderr, "Error: pmNewContext %s\n", pmErrStr(ctx));
  66         exit(1);
  67     }
  68
  69     printf("/* This file is automatically generated .. do not edit! */\n");
  70     printf("#include \"metrics.h\"\n\n");
  71
  72     printf("metric_t metrics[] = {\n");
  73     while (fgets(buf, sizeof(buf), stdin)) {
  74         if ((p = strrchr(buf, '\n')) != NULL)
  75             *p = '\0';
  76
  77         if ((sts = pmLookupName(1, &name, &pmid)) < 0) {
  78             fprintf(stderr, "Error: pmLookupName \"%s\": %s\n", name, pmErrStr(sts));
  79             exit(1);
  80         }
  81
  82         if ((sts = pmLookupDesc(pmid, &desc)) < 0) {
  83             fprintf(stderr, "Error: pmLookupDesc \"%s\": %s\n", name, pmErrStr(sts));
  84             exit(1);
  85         }
  86
  87         printf("    /* %-8s */ { \"%s\", { 0x%04x, PM_TYPE_%s, %s, %s,\n"
  88                "                  { .dimSpace=%d, .dimTime=%d, .dimCount=%d, "
  89                ".scaleSpace=%d, .scaleTime=%d, .scaleCount=%d } } },\n",
  90             pmIDStr(desc.pmid), name, desc.pmid, pmTypeStr(desc.type),
  91             indomStr(desc.indom), semStr[desc.sem], desc.units.dimSpace,
  92             desc.units.dimTime, desc.units.dimCount, desc.units.scaleSpace,
  93             desc.units.scaleTime, desc.units.scaleCount);
  94     }
  95
  96     printf("    { NULL }\n};\n");
  97     exit(0);
  98 }