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glibc  2.9
Defines | Functions
nis-grp.c File Reference
#include <ctype.h>
#include <errno.h>
#include <grp.h>
#include <nss.h>
#include <string.h>
#include <bits/libc-lock.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>
#include "nss-nis.h"
#include <libnsl.h>
#include <nss/nss_files/files-parse.c>

Go to the source code of this file.

Defines

#define ENTNAME   grent
#define STRUCTURE   group
#define EXTERN_PARSER

Functions

 __libc_lock_define_initialized (static, lock)
enum nss_status _nss_nis_endgrent (void)
enum nss_status internal_nis_setgrent (void)
enum nss_status _nss_nis_setgrent (int stayopen)
static enum nss_status internal_nis_getgrent_r (struct group *grp, char *buffer, size_t buflen, int *errnop)
enum nss_status _nss_nis_getgrent_r (struct group *result, char *buffer, size_t buflen, int *errnop)
enum nss_status _nss_nis_getgrnam_r (const char *name, struct group *grp, char *buffer, size_t buflen, int *errnop)
enum nss_status _nss_nis_getgrgid_r (gid_t gid, struct group *grp, char *buffer, size_t buflen, int *errnop)

Define Documentation

#define ENTNAME   grent

Definition at line 33 of file nis-grp.c.

#define EXTERN_PARSER

Definition at line 35 of file nis-grp.c.

#define STRUCTURE   group

Definition at line 34 of file nis-grp.c.


Function Documentation

__libc_lock_define_initialized ( static  ,
lock   
)

Definition at line 39 of file nis-grp.c.

{
  new_start = 1;
  if (oldkey != NULL)
    {
      free (oldkey);
      oldkey = NULL;
      oldkeylen = 0;
    }

  struct response_t *curr = intern.next;

  while (curr != NULL)
    {
      struct response_t *last = curr;
      curr = curr->next;
      free (last);
    }

  intern.next = intern.start = NULL;
}
enum nss_status _nss_nis_endgrent ( void  )

Definition at line 72 of file nis-grp.c.

{
  __libc_lock_lock (lock);

  internal_nis_endgrent ();

  __libc_lock_unlock (lock);

  return NSS_STATUS_SUCCESS;
}
enum nss_status _nss_nis_getgrent_r ( struct group result,
char *  buffer,
size_t  buflen,
int errnop 
)

Definition at line 245 of file nis-grp.c.

{
  int status;

  __libc_lock_lock (lock);

  status = internal_nis_getgrent_r (result, buffer, buflen, errnop);

  __libc_lock_unlock (lock);

  return status;
}

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enum nss_status _nss_nis_getgrgid_r ( gid_t  gid,
struct group grp,
char *  buffer,
size_t  buflen,
int errnop 
)

Definition at line 313 of file nis-grp.c.

{
  char *domain;
  if (__builtin_expect (yp_get_default_domain (&domain), 0))
    return NSS_STATUS_UNAVAIL;

  char buf[32];
  int nlen = sprintf (buf, "%lu", (unsigned long int) gid);

  char *result;
  int len;
  int yperr = yp_match (domain, "group.bygid", buf, nlen, &result, &len);

  if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
    {
      enum nss_status retval = yperr2nss (yperr);

      if (retval == NSS_STATUS_TRYAGAIN)
        *errnop = errno;
      return retval;
    }

  if (__builtin_expect ((size_t) (len + 1) > buflen, 0))
    {
      free (result);
      *errnop = ERANGE;
      return NSS_STATUS_TRYAGAIN;
    }

  char *p = strncpy (buffer, result, len);
  buffer[len] = '\0';
  while (isspace (*p))
    ++p;
  free (result);

  int parse_res = _nss_files_parse_grent (p, grp, (void *) buffer, buflen,
                                     errnop);
  if (__builtin_expect (parse_res < 1, 0))
    {
      if (parse_res == -1)
       return NSS_STATUS_TRYAGAIN;
      else
       return NSS_STATUS_NOTFOUND;
    }
  return NSS_STATUS_SUCCESS;
}

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enum nss_status _nss_nis_getgrnam_r ( const char *  name,
struct group grp,
char *  buffer,
size_t  buflen,
int errnop 
)

Definition at line 260 of file nis-grp.c.

{
  if (name == NULL)
    {
      *errnop = EINVAL;
      return NSS_STATUS_UNAVAIL;
    }

  char *domain;
  if (__builtin_expect (yp_get_default_domain (&domain), 0))
    return NSS_STATUS_UNAVAIL;

  char *result;
  int len;
  int yperr = yp_match (domain, "group.byname", name, strlen (name), &result,
                     &len);

  if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
    {
      enum nss_status retval = yperr2nss (yperr);

      if (retval == NSS_STATUS_TRYAGAIN)
        *errnop = errno;
      return retval;
    }

  if (__builtin_expect ((size_t) (len + 1) > buflen, 0))
    {
      free (result);
      *errnop = ERANGE;
      return NSS_STATUS_TRYAGAIN;
    }

  char *p = strncpy (buffer, result, len);
  buffer[len] = '\0';
  while (isspace (*p))
    ++p;
  free (result);

  int parse_res = _nss_files_parse_grent (p, grp, (void *) buffer, buflen,
                                     errnop);
  if (__builtin_expect  (parse_res < 1, 0))
    {
      if (parse_res == -1)
       return NSS_STATUS_TRYAGAIN;
      else
       return NSS_STATUS_NOTFOUND;
    }
  return NSS_STATUS_SUCCESS;
}

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enum nss_status _nss_nis_setgrent ( int  stayopen)

Definition at line 111 of file nis-grp.c.

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static enum nss_status internal_nis_getgrent_r ( struct group grp,
char *  buffer,
size_t  buflen,
int errnop 
) [static]

Definition at line 129 of file nis-grp.c.

{
  /* If we read the entire database at setpwent time we just iterate
     over the data we have in memory.  */
  bool batch_read = intern.start != NULL;

  char *domain = NULL;
  if (!batch_read && __builtin_expect (yp_get_default_domain (&domain), 0))
    return NSS_STATUS_UNAVAIL;

  /* Get the next entry until we found a correct one. */
  int parse_res;
  do
    {
      char *result;
      char *outkey;
      int len;
      int keylen;

      if (batch_read)
       {
         struct response_t *bucket;

       handle_batch_read:
         bucket = intern.next;

         if (__builtin_expect (intern.offset >= bucket->size, 0))
           {
             if (bucket->next == NULL)
              return NSS_STATUS_NOTFOUND;

             /* We look at all the content in the current bucket.  Go on
               to the next.  */
             bucket = intern.next = bucket->next;
             intern.offset = 0;
           }

         for (result = &bucket->mem[intern.offset]; isspace (*result);
              ++result)
           ++intern.offset;

         len = strlen (result);
       }
      else
       {
         int yperr;

         if (new_start)
           {
             /* Maybe we should read the database in one piece.  */
             if ((_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ)
                && internal_nis_setgrent () == NSS_STATUS_SUCCESS
                && intern.start != NULL)
              {
                batch_read = true;
                goto handle_batch_read;
              }

             yperr = yp_first (domain, "group.byname", &outkey, &keylen,
                            &result, &len);
           }
         else
           yperr = yp_next (domain, "group.byname", oldkey, oldkeylen,
                          &outkey, &keylen, &result, &len);

         if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
           {
             enum nss_status retval = yperr2nss (yperr);

             if (retval == NSS_STATUS_TRYAGAIN)
              *errnop = errno;
             return retval;
           }
       }

      if (__builtin_expect ((size_t) (len + 1) > buflen, 0))
        {
          free (result);
          *errnop = ERANGE;
          return NSS_STATUS_TRYAGAIN;
        }

      char *p = strncpy (buffer, result, len);
      buffer[len] = '\0';
      while (isspace (*p))
        ++p;
      if (!batch_read)
       free (result);

      parse_res = _nss_files_parse_grent (p, grp, (void *) buffer, buflen,
                                     errnop);
      if (__builtin_expect (parse_res == -1, 0))
       {
         if (!batch_read)
           free (outkey);
         *errnop = ERANGE;
         return NSS_STATUS_TRYAGAIN;
       }

      if (batch_read)
       intern.offset += len + 1;
      else
       {
         free (oldkey);
         oldkey = outkey;
         oldkeylen = keylen;
         new_start = 0;
       }
    }
  while (parse_res < 1);

  return NSS_STATUS_SUCCESS;
}

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Definition at line 85 of file nis-grp.c.

{
  /* We have to read all the data now.  */
  char *domain;
  if (__builtin_expect (yp_get_default_domain (&domain), 0))
    return NSS_STATUS_UNAVAIL;

  struct ypall_callback ypcb;

  ypcb.foreach = _nis_saveit;
  ypcb.data = (char *) &intern;
  enum nss_status status = yperr2nss (yp_all (domain, "group.byname", &ypcb));


  /* Mark the last buffer as full.  */
  if (intern.next != NULL)
    intern.next->size = intern.offset;

  intern.next = intern.start;
  intern.offset = 0;

  return status;
}

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