Back to index

glibc  2.9
Classes | Functions | Variables
nscd_stat.c File Reference
#include <errno.h>
#include <error.h>
#include <inttypes.h>
#include <langinfo.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>
#include <libintl.h>
#include "nscd.h"
#include "dbg_log.h"
#include "selinux.h"

Go to the source code of this file.

Classes

struct  dbstat
struct  statdata

Functions

void send_stats (int fd, struct database_dyn dbs[lastdb])
int receive_print_stats (void)

Variables

static const char compilation [21] = " " __TIME__

Class Documentation

struct dbstat

Definition at line 44 of file nscd_stat.c.

Class Members
uintmax_t addfailed
int check_file
size_t datasize
size_t dataused
int enabled
size_t maxnentries
size_t maxnsearched
size_t module
uintmax_t neghit
uintmax_t negmiss
unsigned long int negtimeout
size_t nentries
int persistent
uintmax_t poshit
uintmax_t posmiss
unsigned long int postimeout
uintmax_t rdlockdelayed
int shared
uintmax_t wrlockdelayed
struct statdata

Definition at line 73 of file nscd_stat.c.

Class Members
unsigned long int client_queued
int debug_level
int max_nthreads
int ndbs
int nthreads
int paranoia
time_t restart_interval
time_t runtime
char version

Function Documentation

Definition at line 148 of file nscd_stat.c.

{
  struct statdata data;
  request_header req;
  ssize_t nbytes;
  int fd;
  int i;
  uid_t uid = getuid ();
  const char *yesstr = _("yes");
  const char *nostr = _("no");

  /* Find out whether there is another user but root allowed to
     request statistics.  */
  if (uid != 0)
    {
      /* User specified?  */
      if(stat_user == NULL || stat_uid != uid)
       {
         if (stat_user != NULL)
           error (EXIT_FAILURE, 0,
                 _("Only root or %s is allowed to use this option!"),
                 stat_user);
         else
           error (EXIT_FAILURE, 0,
                 _("Only root is allowed to use this option!"));
       }
    }

  /* Open a socket to the running nscd.  */
  fd = nscd_open_socket ();
  if (fd == -1)
    error (EXIT_FAILURE, 0, _("nscd not running!\n"));

  /* Send the request.  */
  req.version = NSCD_VERSION;
  req.type = GETSTAT;
  req.key_len = 0;
  nbytes = TEMP_FAILURE_RETRY (send (fd, &req, sizeof (request_header),
                                 MSG_NOSIGNAL));
  if (nbytes != sizeof (request_header))
    {
      int err = errno;
      close (fd);
      error (EXIT_FAILURE, err, _("write incomplete"));
    }

  /* Read as much data as we expect.  */
  if (TEMP_FAILURE_RETRY (read (fd, &data, sizeof (data))) != sizeof (data)
      || (memcmp (data.version, compilation, sizeof (compilation)) != 0
         /* Yes, this is an assignment!  */
         && (errno = EINVAL)))
    {
      /* Not the right version.  */
      int err = errno;
      close (fd);
      error (EXIT_FAILURE, err, _("cannot read statistics data"));
    }

  printf (_("nscd configuration:\n\n%15d  server debug level\n"),
         data.debug_level);

  /* We know that we can simply subtract time_t values.  */
  unsigned long int diff = data.runtime;
  unsigned int ndays = 0;
  unsigned int nhours = 0;
  unsigned int nmins = 0;
  if (diff > 24 * 60 * 60)
    {
      ndays = diff / (24 * 60 * 60);
      diff %= 24 * 60 * 60;
    }
  if (diff > 60 * 60)
    {
      nhours = diff / (60 * 60);
      diff %= 60 * 60;
    }
  if (diff > 60)
    {
      nmins = diff / 60;
      diff %= 60;
    }
  if (ndays != 0)
    printf (_("%3ud %2uh %2um %2lus  server runtime\n"),
           ndays, nhours, nmins, diff);
  else if (nhours != 0)
    printf (_("    %2uh %2um %2lus  server runtime\n"), nhours, nmins, diff);
  else if (nmins != 0)
    printf (_("        %2um %2lus  server runtime\n"), nmins, diff);
  else
    printf (_("            %2lus  server runtime\n"), diff);

  printf (_("%15d  current number of threads\n"
           "%15d  maximum number of threads\n"
           "%15lu  number of times clients had to wait\n"
           "%15s  paranoia mode enabled\n"
           "%15lu  restart internal\n"),
         data.nthreads, data.max_nthreads, data.client_queued,
         data.paranoia ? yesstr : nostr,
         (unsigned long int) data.restart_interval);

  for (i = 0; i < lastdb; ++i)
    {
      unsigned long int hit = data.dbs[i].poshit + data.dbs[i].neghit;
      unsigned long int all = hit + data.dbs[i].posmiss + data.dbs[i].negmiss;
      const char *enabled = data.dbs[i].enabled ? yesstr : nostr;
      const char *check_file = data.dbs[i].check_file ? yesstr : nostr;
      const char *shared = data.dbs[i].shared ? yesstr : nostr;
      const char *persistent = data.dbs[i].persistent ? yesstr : nostr;

      if (enabled[0] == '\0')
       /* The locale does not provide this information so we have to
          translate it ourself.  Since we should avoid short translation
          terms we artifically increase the length.  */
       enabled = data.dbs[i].enabled ? yesstr : nostr;
      if (check_file[0] == '\0')
       check_file = data.dbs[i].check_file ? yesstr : nostr;
      if (shared[0] == '\0')
       shared = data.dbs[i].shared ? yesstr : nostr;
      if (persistent[0] == '\0')
       persistent = data.dbs[i].persistent ? yesstr : nostr;

      if (all == 0)
       /* If nothing happened so far report a 0% hit rate.  */
       all = 1;

      printf (_("\n%s cache:\n\n"
              "%15s  cache is enabled\n"
              "%15s  cache is persistent\n"
              "%15s  cache is shared\n"
              "%15zu  suggested size\n"
              "%15zu  total data pool size\n"
              "%15zu  used data pool size\n"
              "%15lu  seconds time to live for positive entries\n"
              "%15lu  seconds time to live for negative entries\n"
              "%15" PRIuMAX "  cache hits on positive entries\n"
              "%15" PRIuMAX "  cache hits on negative entries\n"
              "%15" PRIuMAX "  cache misses on positive entries\n"
              "%15" PRIuMAX "  cache misses on negative entries\n"
              "%15lu%% cache hit rate\n"
              "%15zu  current number of cached values\n"
              "%15zu  maximum number of cached values\n"
              "%15zu  maximum chain length searched\n"
              "%15" PRIuMAX "  number of delays on rdlock\n"
              "%15" PRIuMAX "  number of delays on wrlock\n"
              "%15" PRIuMAX "  memory allocations failed\n"
              "%15s  check /etc/%s for changes\n"),
             dbnames[i], enabled, persistent, shared,
             data.dbs[i].module,
             data.dbs[i].datasize, data.dbs[i].dataused,
             data.dbs[i].postimeout, data.dbs[i].negtimeout,
             data.dbs[i].poshit, data.dbs[i].neghit,
             data.dbs[i].posmiss, data.dbs[i].negmiss,
             (100 * hit) / all,
             data.dbs[i].nentries, data.dbs[i].maxnentries,
             data.dbs[i].maxnsearched,
             data.dbs[i].rdlockdelayed,
             data.dbs[i].wrlockdelayed,
             data.dbs[i].addfailed, check_file, dbnames[i]);
    }

  if (selinux_enabled)
    nscd_avc_print_stats (&data.cstats);

  close (fd);

  exit (0);
}

Here is the call graph for this function:

Here is the caller graph for this function:

void send_stats ( int  fd,
struct database_dyn  dbs[lastdb] 
)

Definition at line 92 of file nscd_stat.c.

{
  struct statdata data;
  int cnt;

  memcpy (data.version, compilation, sizeof (compilation));
  data.debug_level = debug_level;
  data.runtime = time (NULL) - start_time;
  data.client_queued = client_queued;
  data.nthreads = nthreads;
  data.max_nthreads = max_nthreads;
  data.paranoia = paranoia;
  data.restart_interval = restart_interval;
  data.ndbs = lastdb;

  for (cnt = 0; cnt < lastdb; ++cnt)
    {
      memset (&data.dbs[cnt], 0, sizeof (data.dbs[cnt]));
      data.dbs[cnt].enabled = dbs[cnt].enabled;
      data.dbs[cnt].check_file = dbs[cnt].check_file;
      data.dbs[cnt].shared = dbs[cnt].shared;
      data.dbs[cnt].persistent = dbs[cnt].persistent;
      data.dbs[cnt].postimeout = dbs[cnt].postimeout;
      data.dbs[cnt].negtimeout = dbs[cnt].negtimeout;
      if (dbs[cnt].head != NULL)
       {
         data.dbs[cnt].module = dbs[cnt].head->module;
         data.dbs[cnt].poshit = dbs[cnt].head->poshit;
         data.dbs[cnt].neghit = dbs[cnt].head->neghit;
         data.dbs[cnt].posmiss = dbs[cnt].head->posmiss;
         data.dbs[cnt].negmiss = dbs[cnt].head->negmiss;
         data.dbs[cnt].nentries = dbs[cnt].head->nentries;
         data.dbs[cnt].maxnentries = dbs[cnt].head->maxnentries;
         data.dbs[cnt].datasize = dbs[cnt].head->data_size;
         data.dbs[cnt].dataused = dbs[cnt].head->first_free;
         data.dbs[cnt].maxnsearched = dbs[cnt].head->maxnsearched;
         data.dbs[cnt].rdlockdelayed = dbs[cnt].head->rdlockdelayed;
         data.dbs[cnt].wrlockdelayed = dbs[cnt].head->wrlockdelayed;
         data.dbs[cnt].addfailed = dbs[cnt].head->addfailed;
       }
    }

  if (selinux_enabled)
    nscd_avc_cache_stats (&data.cstats);

  if (TEMP_FAILURE_RETRY (send (fd, &data, sizeof (data), MSG_NOSIGNAL))
      != sizeof (data))
    {
      char buf[256];
      dbg_log (_("cannot write statistics: %s"),
              strerror_r (errno, buf, sizeof (buf)));
    }
}

Here is the call graph for this function:

Here is the caller graph for this function:


Variable Documentation

const char compilation[21] = " " __TIME__ [static]

Definition at line 41 of file nscd_stat.c.