[Bug nscd/22632] New: frequest getpwuid failures in LDAP environemnt

["hiralo at netapp dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=22632

            Bug ID: 22632
           Summary: frequest getpwuid failures in LDAP environemnt
           Product: glibc
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: nscd
          Assignee: unassigned at sourceware dot org
          Reporter: hiralo at netapp dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

We are observing glibc-2.16 ‘getpwuid()’ failing even for valid uids.
Can you please suggest patch for glibc-2.16?

Sample C prog and compile steps:
     5  /*
     6     a. Using glibc-2.16
     7     $ gcc -Wl,-rpath <path_to_host_glibc-2.16 i.e. /tmp/glibc-2.16/lib>
-o using_glibc-2.16 test.c
     8     $ ldd using_glibc-2.16
     9     linux-vdso.so.1 (0x00007fff4e968000)
    10     libc.so.6 => //tmp/glibc-2.16/lib/libc.so.6 (0x00007f555a35d000)
    11     /tmp/glibc-2.16/lib/ld-linux-x86-64.so.2 (0x00007f555a705000)
    12   */
    13
    14  #include <stdio.h>
    15  #include <stdlib.h>
    16  #include <errno.h>
    17  #include <string.h>
    18  #include <sys/types.h>
    19  #include <pwd.h>
    20  #include <sys/time.h>
    21
    22  char noerror[] = "The given name or uid was not found.";
    23
    24  int main( int argc, char **argv )
    25  {
    26      FILE *fp;
    27      char  uidnumber[32];
    28      uid_t uidn[32768];
    29      unsigned long i = 0, iteration = 0, failed = 0, sample = 100;
    30      float per_s = 0, pct = 0;
    31      int    errsv;
    32      struct passwd *pwent;
    33      struct timeval start;
    34      struct timeval now;
    35
    36      /* Open the command for reading. */
    37      fp = popen("/usr/bin/ldapcat passwd | /usr/bin/cut -d: -f3", "r");
    38      if (fp == NULL) {
    39          printf("Failed to run command\n" );
    40          exit(1);
    41      }
    42
    43      /* Read the output a line at a time - output it. */
    44      while (fgets(uidnumber, sizeof(uidnumber)-1, fp) != NULL) {
    45          uidn[i++] = atol(uidnumber);
    46          uidn[i] = -1;
    47      }
    48
    49      /* close */
    50      pclose(fp);
    51
    52      gettimeofday(&start, NULL);
    53      while (1)
    54      {
    55          i = 0;
    56          while (uidn[i] != -1)
    57          {
    58              iteration++;
    59              pct = (float)failed / (float)iteration * 100;
    60              errno = 0;
    61              if ((pwent = getpwuid(uidn[i])) == NULL)
    62              {
    63                  errsv = errno;
    64                  failed++;
    65                  pct = (float)failed / (float)iteration * 100;
    66                  printf("%ld/%ld (%0.6f%) (%1.0f/sec %ds ET)
getpwuid(%ld) - %s (%d)\n",
    67                          failed, iteration, pct, per_s, now.tv_sec -
start.tv_sec, uidn[i++],
    68                          (errsv == 0 ? noerror : strerror(errsv)),
errsv);
    69              }
    70
    71              if ((iteration % (sample*10)) == 0)
    72              {
    73                  gettimeofday(&now, NULL);
    74                  if (now.tv_sec - start.tv_sec > 0)
    75                  {
    76                      per_s = iteration / (now.tv_sec - start.tv_sec);
    77                  }
    78
    79                  sample = (((int)per_s/40)/10)*10;
    80                  if (sample < 10) { sample = 10; }
    81                  if (sample > 10000) { sample = 10000; }
    82              }
    83
    84              if (iteration % sample == 0)
    85              {
    86                  printf("%ld/%ld (%0.6f%) (%1.0f/sec %ds ET)
getpwuid(%ld)                \r",
    87                          failed, iteration, pct, per_s, now.tv_sec -
start.tv_sec, uidn[i++]);
    88              }
    89          }
    90      }
    91      return 0;
    92  }
</draft>

Thank you.

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