C++ pmErrStr函数代码示例

static char *
rawlocalhost(pmOptions *opts)
{
	int		ctxt;
	char		*host;

	if (opts->nhosts > 0)
		return opts->hosts[0];

	if ((ctxt = pmNewContext(PM_CONTEXT_LOCAL, NULL)) < 0)
	{
		fprintf(stderr, "%s: cannot create local context: %s\n",
			pmProgname, pmErrStr(ctxt));
		cleanstop(1);
	}
	host = (char *)pmGetContextHostName(ctxt);
	pmDestroyContext(ctxt);

	if (host[0] == '\0')
	{
		fprintf(stderr, "%s: cannot find local hostname\n", pmProgname);
		cleanstop(1);
	}
	return host;
}

void 
darwin_init(pmdaInterface *dp)
{
    int		sts;

    if (_isDSO) {
	int sep = __pmPathSeparator();
	char helppath[MAXPATHLEN];
	sprintf(helppath, "%s%c" "darwin" "%c" "help",
		pmGetConfig("PCP_PMDAS_DIR"), sep, sep);
	pmdaDSO(dp, PMDA_INTERFACE_3, "darwin DSO", helppath);
    } else {
	__pmSetProcessIdentity(username);
    }

    if (dp->status != 0)
	return;

    dp->version.two.instance = darwin_instance;
    dp->version.two.fetch = darwin_fetch;
    pmdaSetFetchCallBack(dp, darwin_fetchCallBack);

    pmdaSetFlags(dp, PMDA_EXT_FLAG_DIRECT);
    pmdaInit(dp, indomtab, sizeof(indomtab)/sizeof(indomtab[0]),
		metrictab, sizeof(metrictab)/sizeof(metrictab[0]));

    mach_host = mach_host_self();
    host_page_size(mach_host, &mach_page_size);
    mach_page_shift = ffs(mach_page_size) - 1;
    if (refresh_hertz(&mach_hertz) != 0)
	mach_hertz = 100;
    if ((sts = refresh_hinv()) != 0)
	fprintf(stderr, "darwin_init: refresh_hinv failed: %s\n", pmErrStr(sts));
    init_network();
}

static void
mounts_config_file_check(void)
{
    struct stat statbuf;
    static int  last_error;
    int sep = __pmPathSeparator();

    snprintf(mypath, sizeof(mypath), "%s%c" "mounts" "%c" "mounts.conf",
		pmGetConfig("PCP_PMDAS_DIR"), sep, sep);
    if (stat(mypath, &statbuf) == -1) {
	if (oserror() != last_error) {
	    last_error = oserror();
	    __pmNotifyErr(LOG_WARNING, "stat failed on %s: %s\n",
			mypath, pmErrStr(last_error));
	}
    } else {
	last_error = 0;
#if defined(HAVE_ST_MTIME_WITH_E)
	if (statbuf.st_mtime != file_change.st_mtime)
#elif defined(HAVE_ST_MTIME_WITH_SPEC)
	if (statbuf.st_mtimespec.tv_sec != file_change.st_mtimespec.tv_sec ||
	    statbuf.st_mtimespec.tv_nsec != file_change.st_mtimespec.tv_nsec)
#else     
	if (statbuf.st_mtim.tv_sec != file_change.st_mtim.tv_sec ||
	    statbuf.st_mtim.tv_nsec != file_change.st_mtim.tv_nsec)
#endif
	{
	    mounts_clear_config_info();
	    mounts_grab_config_info();
	    file_change = statbuf;
	}
    }
}

/*
 * Set the origin position and interval for PMAPI context fetching
 */
static int
setup_origin(pmOptions *opts)
{
	int		sts = 0;

	curtime = origin = opts->origin;

	/* initial archive mode, position and delta */
	if (opts->context == PM_CONTEXT_ARCHIVE)
	{
		if (opts->interval.tv_sec || opts->interval.tv_usec)
			interval = opts->interval;

		setup_step_mode(opts, 1);

		if ((sts = pmSetMode(fetchmode, &curtime, fetchstep)) < 0)
		{
			pmprintf(
		"%s: pmSetMode failure: %s\n", pmProgname, pmErrStr(sts));
			opts->flags |= PM_OPTFLAG_RUNTIME_ERR;
			opts->errors++;
		}
	}

	return sts;
}

int
fetch_metrics(const char *purpose, int nmetrics, pmID *pmids, pmResult **result)
{
	int	sts;

	pmSetMode(fetchmode, &curtime, fetchstep);
	if ((sts = pmFetch(nmetrics, pmids, result)) < 0)
	{
		if (sts != PM_ERR_EOL)
			fprintf(stderr, "%s: %s query: %s\n",
				pmProgname, purpose, pmErrStr(sts));
		cleanstop(1);
	}
	if (pmDebug & DBG_TRACE_APPL1)
	{
		pmResult	*rp = *result;
		struct tm	tmp;
		time_t		sec;

		sec = (time_t)rp->timestamp.tv_sec;
		pmLocaltime(&sec, &tmp);

		fprintf(stderr, "%s: got %d %s metrics @%02d:%02d:%02d.%03d\n",
				pmProgname, rp->numpmid, purpose,
				tmp.tm_hour, tmp.tm_min, tmp.tm_sec,
				(int)(rp->timestamp.tv_usec / 1000));
	}
	return sts;
}

static void
SignalReloadPMNS(void)
{
    int sts;

    /* Reload PMNS if necessary. 
     * Note: this will only stat() the base name i.e. ASCII pmns,
     * typically $PCP_VAR_DIR/pmns/root and not $PCP_VAR_DIR/pmns/root.bin .
     * This is considered a very low risk problem, as the binary
     * PMNS is always compiled from the ASCII version;
     * when one changes so should the other.
     * This caveat was allowed to make the code a lot simpler. 
     */
    if (__pmHasPMNSFileChanged(pmnsfile)) {
	__pmNotifyErr(LOG_INFO, "Reloading PMNS \"%s\"",
	   (pmnsfile==PM_NS_DEFAULT)?"DEFAULT":pmnsfile);
	pmUnloadNameSpace();
	sts = pmLoadASCIINameSpace(pmnsfile, dupok);
	if (sts < 0) {
	    __pmNotifyErr(LOG_ERR, "pmLoadASCIINameSpace(%s, %d): %s\n",
		(pmnsfile == PM_NS_DEFAULT) ? "DEFAULT" : pmnsfile, dupok, pmErrStr(sts));
	}
    }
    else {
	__pmNotifyErr(LOG_INFO, "PMNS file \"%s\" is unchanged",
		(pmnsfile == PM_NS_DEFAULT) ? "DEFAULT" : pmnsfile);
    }
}

/*
 * with -e come here for every metric in the PMNS ...
 */
void
dometric(const char *name)
{
    int		sts;
    pmID	pmid;
    char	*tp;

    sts = pmLookupName(1, (char **)&name, &pmid);
    if (sts < 0) {
	fprintf(stderr, "pmLookupName: failed for \"%s\": %s\n", name, pmErrStr(sts));
	return;
    }
    if (sts == 0) {
	fprintf(stderr, "pmLookupName: failed for \"%s\"\n", name);
	return;
    }

    tp = pmdaGetHelp(handle, pmid, PM_TEXT_ONELINE);
    if (tp != NULL)
	return;
    tp = pmdaGetHelp(handle, pmid, PM_TEXT_HELP);
    if (tp != NULL)
	return;

    /* no help text, report metric */
    printf("%s\n", name);
}

static void *
func2(void *arg)
{
    char	*fn = "func2";
    int		i;
    int		j;
    FILE	*f;

    if ((f = fopen("/tmp/func2.out", "w")) == NULL) {
	perror("func2 fopen");
	pthread_exit("botch");
    }

    j = pmUseContext(ctx2);
    if ( j < 0) {
	fprintf(f, "Error: %s: pmUseContext(%d) -> %s\n", fn, ctx2, pmErrStr(j));
	fclose(f);
	pthread_exit("botch");
    }

    pthread_barrier_wait(&barrier);

    for (j = 0; j < 100; j++) {
	for (i = NMETRIC-1; i >= 0; i--)
	    foo(f, fn, i);
    }

    fclose(f);
    pthread_exit(NULL);
}

static void
_e(int since)
{
    int		i;
    int		j;
    int		sts;
    int		inst;

    indom = pmInDom_build(FORQA, 11);

    sts = pmdaCacheOp(indom, PMDA_CACHE_LOAD);
    if (sts < 0) {
	fprintf(stderr, "PMDA_CACHE_LOAD failed: %s\n", pmErrStr(sts));
	return;
    }

    j = 1;
    for (i = 0; i < 10; i++) {
	pmsprintf(nbuf, sizeof(nbuf), "boring-instance-%03d", i);
        inst = pmdaCacheStore(indom, PMDA_CACHE_ADD, nbuf, (void *)((__psint_t)(0xcaffe000+i)));
	if (inst < 0)
	    fprintf(stderr, "PMDA_CACHE_ADD failed for \"%s\": %s\n", nbuf, pmErrStr(inst));
	if (i == j) {
	    j <<= 1;
	    inst = pmdaCacheStore(indom, PMDA_CACHE_HIDE, nbuf, NULL);
	    if (inst < 0)
		fprintf(stderr, "PMDA_CACHE_HIDE failed for \"%s\": %s\n", nbuf, pmErrStr(inst));
	}
    }

    sts = pmdaCacheOp(indom, PMDA_CACHE_SAVE);
    fprintf(stderr, "Save -> %d\n", sts);
    fprintf(stderr, "Before purge ...\n");
    __pmdaCacheDump(stderr, indom, 0);

    sleep(1);

    sts = pmdaCachePurge(indom, since);
    if (sts < 0) {
	fprintf(stderr, "pmdaCachePurge failed: %s\n", pmErrStr(sts));
	return;
    }
    fprintf(stderr, "Purged %d entries\nAfter purge ...\n", sts);
    sts = pmdaCacheOp(indom, PMDA_CACHE_SAVE);
    fprintf(stderr, "Save -> %d\n", sts);
    __pmdaCacheDump(stderr, indom, 0);
}

int
main(int argc, char **argv)
{
    char		*msg;
    char		buffer[512];
    __pmHashCtl		attrs;
    pmHostSpec		*hosts;
    int			count, sts, i, j;

    if (argc != 2) {
	fprintf(stderr, "Usage: parsehostattrs spec\n");
	exit(1);
    }

    __pmHashInit(&attrs);
    printf("pmParseHostAttrsSpec(\"%s\", ...)\n", argv[1]);
    sts = __pmParseHostAttrsSpec(argv[1], &hosts, &count, &attrs, &msg);
    if (sts < 0) {
	if (sts == PM_ERR_GENERIC)
	    printf("pmParseHostAttrsSpec error:\n%s\n", msg);
	else
	    printf("Error: %s\n", pmErrStr(sts));
	exit(1);
    }
    for (i = 0; i < count; i++) {
	printf("host[%d]: \"%s\"", i, hosts[i].name);
	if (hosts[i].nports == 1)
	    printf(" port:");
	else if (hosts[i].nports > 1)
	    printf(" ports:");
	for (j = 0; j < hosts[i].nports; j++)
	    printf(" %d", hosts[i].ports[j]);
	putchar('\n');
    }
    __pmHashWalkCB(print_attribute, NULL, &attrs);

    sts = __pmUnparseHostAttrsSpec(hosts, count, &attrs, buffer, sizeof(buffer));
    if (sts < 0) {
	printf("pmUnparseHostAttrsSpec: %s\n", pmErrStr(sts));
	exit(1);
    }
    printf("pmUnparseHostAttrsSpec(\"%s\") -> \"%s\"\n", argv[1], buffer);

    __pmFreeHostAttrsSpec(hosts, count, &attrs);
    __pmHashClear(&attrs);
    exit(0);
}

static int
refresh_net_dev_hw_addr(pmInDom indom)
{
    int sts;
    DIR *dp;
    char *devname;
    struct dirent *dentry;
    char path[MAXPATHLEN];
    net_addr_t *netip;

    static uint32_t cache_err;

    snprintf(path, sizeof(path), "%s/sys/class/net", linux_statspath);
    if ((dp = opendir(path)) != NULL) {
	while ((dentry = readdir(dp)) != NULL) {
	    if (dentry->d_name[0] == '.')
		continue;
	    devname = dentry->d_name;
	    sts = pmdaCacheLookupName(indom, devname, NULL, (void **)&netip);
	    if (sts == PM_ERR_INST || (sts >= 0 && netip == NULL)) {
		/* first time since re-loaded, else new one */
		netip = (net_addr_t *)calloc(1, sizeof(net_addr_t));
	    }
	    else if (sts < 0) {
		if (cache_err++ < 10) {
		    fprintf(stderr, "refresh_net_dev_hw_addr: "
				"pmdaCacheLookupName(%s, %s, ...) failed: %s\n",
			pmInDomStr(indom), devname, pmErrStr(sts));
		}
		continue;
	    }
	    if ((sts = pmdaCacheStore(indom, PMDA_CACHE_ADD, devname, (void *)netip)) < 0) {
		if (cache_err++ < 10) {
		    fprintf(stderr, "refresh_net_dev_hw_addr: "
				"pmdaCacheStore(%s, PMDA_CACHE_ADD, %s, "
				PRINTF_P_PFX "%p) failed: %s\n",
			    pmInDomStr(indom), devname, netip, pmErrStr(sts));
		}
		continue;
	    }

	    refresh_net_hw_addr(devname, netip);
	}
	closedir(dp);
    }
    return 0;
}

int
main(int argc, char *argv[])
{
    int ctx;
    int sts;
    char buf[1024];
    char *name = buf;
    char *p;
    pmID pmid;
    pmDesc desc;

    ctx = pmNewContext(PM_CONTEXT_HOST, "local:");
    if (ctx < 0) {
    	fprintf(stderr, "Error: pmNewContext %s\n", pmErrStr(ctx));
	exit(1);
    }

    printf("/* This file is automatically generated .. do not edit! */\n");
    printf("#include \"metrics.h\"\n\n");

    printf("metric_t metrics[] = {\n");
    while (fgets(buf, sizeof(buf), stdin)) {
	if ((p = strrchr(buf, '\n')) != NULL)
	    *p = '\0';

	if ((sts = pmLookupName(1, &name, &pmid)) < 0) {
	    fprintf(stderr, "Error: pmLookupName \"%s\": %s\n", name, pmErrStr(sts));
	    exit(1);
	}

	if ((sts = pmLookupDesc(pmid, &desc)) < 0) {
	    fprintf(stderr, "Error: pmLookupDesc \"%s\": %s\n", name, pmErrStr(sts));
	    exit(1);
	}

	printf("    /* %-8s */ { \"%s\", { 0x%04x, PM_TYPE_%s, %s, %s,\n"
	       "                  { .dimSpace=%d, .dimTime=%d, .dimCount=%d, "
	       ".scaleSpace=%d, .scaleTime=%d, .scaleCount=%d } } },\n",
	    pmIDStr(desc.pmid), name, desc.pmid, pmTypeStr(desc.type),
	    indomStr(desc.indom), semStr[desc.sem], desc.units.dimSpace,
	    desc.units.dimTime, desc.units.dimCount, desc.units.scaleSpace,
	    desc.units.scaleTime, desc.units.scaleCount);
    }

    printf("    { NULL }\n};\n");
    exit(0);
}

static int
traverse(const char *str, double scale)
{
    pmMetricSpec	*theMetric;
    char		*msg;
    int			sts = 0;

    sts = pmParseMetricSpec((char *)str, 0, (char *)0, &theMetric, &msg);
    if (sts < 0) {
	pmprintf("%s: Error: Unable to parse metric spec:\n%s\n", 
		 pmProgname, msg);
	free(msg);
	return sts;
    }

    // If the metric has instances, then it cannot be traversed
    if (theMetric->ninst) {
	QmcMetric *metric = group->addMetric(theMetric, scale);
	if (metric->status() >= 0) {
	    checkUnits(metric);
	    metrics.append(metric);
	    numValues += metric->numValues();
	}
	else
	    sts = -1;
    }
    else {
	if (theMetric->isarch == 0)
	    doMetricType = PM_CONTEXT_HOST;
	else if (theMetric->isarch == 1)
	    doMetricType = PM_CONTEXT_ARCHIVE;
	else if (theMetric->isarch == 2)
	    doMetricType = PM_CONTEXT_LOCAL;
	else {
	    pmprintf("%s: Error: invalid metric source (%d): %s\n",
			 pmProgname, theMetric->isarch, theMetric->metric);
	    sts = -1;
	}
	doMetricSource = theMetric->source;
	if (sts >= 0)
	   sts = group->use(doMetricType, doMetricSource);
	if (sts >= 0) {
	    doMetricScale = scale;
	    sts = pmTraversePMNS(theMetric->metric, dometric);
	    if (sts >= 0 && doMetricFlag == false)
		sts = -1;
	    else if (sts < 0) {
		pmprintf("%s: Error: %s: %s\n",
			 pmProgname, theMetric->metric, pmErrStr(sts));
	    }
	}
    }

    free(theMetric);

    return sts;
}

static void
mydump(const char *name, pmDesc *dp, pmValueSet *vsp)
{
    int		j;
    char	*p;

    if (vsp->numval == 0) {
	if (verbose)
	    printf("%s: No value(s) available!\n", name);
	return;
    }
    else if (vsp->numval < 0) {
	printf("%s: Error: %s\n", name, pmErrStr(vsp->numval));
	return;
    }

    printf("    %s", name);
    for (j = 0; j < vsp->numval; j++) {
	pmValue	*vp = &vsp->vlist[j];
	if (dp->indom != PM_INDOM_NULL) {
	    if (vsp->numval > 1)
		printf("\n        ");
	    if ((p = lookup(dp->indom, vp->inst)) == NULL)
		printf("[%d]", vp->inst);
	    else
		printf("[\"%s\"]", p);
	}
	putchar(' ');

	switch (dp->type) {
	case PM_TYPE_AGGREGATE:
	case PM_TYPE_AGGREGATE_STATIC: {
	    /*
	     * pinched from pmPrintValue, just without the preamble of
	     * floating point values
	     */
	    char	*p;
	    int		i;
	    putchar('[');
	    p = &vp->value.pval->vbuf[0];
	    for (i = 0; i < vp->value.pval->vlen - PM_VAL_HDR_SIZE; i++, p++)
		printf("%02x", *p & 0xff);
	    putchar(']');
	    putchar('\n');
	    break;
	}
	case PM_TYPE_EVENT:
	case PM_TYPE_HIGHRES_EVENT:
	    /* odd, nested event type! */
	    myeventdump(vsp, j, dp->type != PM_TYPE_EVENT);
	    break;
	default:
	    pmPrintValue(stdout, vsp->valfmt, dp->type, vp, 1);
	    putchar('\n');
	}
    }
}

/*
 * PMAPI context creation and initial command line option handling.
 */
static int
setup_context(pmOptions *opts)
{
	char		*source;
	int		sts, ctx;

	if (opts->context == PM_CONTEXT_ARCHIVE)
		source = opts->archives[0];
	else if (opts->context == PM_CONTEXT_HOST)
		source = opts->hosts[0];
	else if (opts->context == PM_CONTEXT_LOCAL)
		source = NULL;
	else
	{
		opts->context = PM_CONTEXT_HOST;
		source = "local:";
	}

	if ((sts = ctx = pmNewContext(opts->context, source)) < 0)
	{
		if (opts->context == PM_CONTEXT_HOST)
			pmprintf(
		"%s: Cannot connect to pmcd on host \"%s\": %s\n",
				pmProgname, source, pmErrStr(sts));
		else if (opts->context == PM_CONTEXT_LOCAL)
			pmprintf(
		"%s: Cannot make standalone connection on localhost: %s\n",
				pmProgname, pmErrStr(sts));
		else
			pmprintf(
		"%s: Cannot open archive \"%s\": %s\n",
				pmProgname, source, pmErrStr(sts));
	}
	else if ((sts = pmGetContextOptions(ctx, opts)) == 0)
		sts = setup_origin(opts);

	if (sts < 0)
	{
		pmflush();
		cleanstop(1);
	}

	return ctx;
}