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glibc  2.9
Functions | Variables
nisplus-grp.c File Reference
#include <atomic.h>
#include <nss.h>
#include <grp.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <bits/libc-lock.h>
#include <rpcsvc/nis.h>
#include "nss-nisplus.h"
#include "nisplus-parser.h"
#include <libnsl.h>
#include <nis_intern.h>
#include <nis_xdr.h>

Go to the source code of this file.

Functions

 __libc_lock_define_initialized (static, lock)
enum nss_status _nss_grp_create_tablename (int *errnop)
static void internal_endgrent (void)
static enum nss_status internal_setgrent (int *errnop)
enum nss_status _nss_nisplus_setgrent (int stayopen)
enum nss_status _nss_nisplus_endgrent (void)
static enum nss_status internal_nisplus_getgrent_r (struct group *gr, char *buffer, size_t buflen, int *errnop)
enum nss_status _nss_nisplus_getgrent_r (struct group *result, char *buffer, size_t buflen, int *errnop)
enum nss_status _nss_nisplus_getgrnam_r (const char *name, struct group *gr, char *buffer, size_t buflen, int *errnop)
enum nss_status _nss_nisplus_getgrgid_r (const gid_t gid, struct group *gr, char *buffer, size_t buflen, int *errnop)

Variables

static ib_request * ibreq
static directory_obj * dir
static dir_binding bptr
static char * tablepath
static char * tableptr
static netobj cursor
nis_name grp_tablename_val attribute_hidden

Function Documentation

__libc_lock_define_initialized ( static  ,
lock   
)

Definition at line 34 of file getnetgrent_r.c.

{
  /* Remember the first service_entry, it's always the same.  */
  static bool startp_initialized;
  static service_user *startp;
  int no_more;

  if (!startp_initialized)
    {
      /* Executing this more than once at the same time must yield the
        same result every time.  So we need no locking.  */
      no_more = __nss_netgroup_lookup (nipp, "setnetgrent", fctp);
      startp = no_more ? (service_user *) -1 : *nipp;
      PTR_MANGLE (startp);
      atomic_write_barrier ();
      startp_initialized = true;
    }
  else
    {
      service_user *nip = startp;
      PTR_DEMANGLE (nip);
      if (nip == (service_user *) -1)
       /* No services at all.  */
       return 1;

      /* Reset to the beginning of the service list.  */
      *nipp = nip;
      /* Look up the first function.  */
      no_more = __nss_lookup (nipp, "setnetgrent", NULL, fctp);
    }
  return no_more;
}

Definition at line 53 of file nisplus-grp.c.

{
  if (grp_tablename_val == NULL)
    {
      const char *local_dir = nis_local_directory ();
      size_t local_dir_len = strlen (local_dir);
      static const char prefix[] = "group.org_dir.";

      char *p = malloc (sizeof (prefix) + local_dir_len);
      if (p == NULL)
       {
         *errnop = errno;
         return NSS_STATUS_TRYAGAIN;
       }

      memcpy (__stpcpy (p, prefix), local_dir, local_dir_len + 1);

      grp_tablename_len = sizeof (prefix) - 1 + local_dir_len;

      atomic_write_barrier ();

      if (atomic_compare_and_exchange_bool_acq (&grp_tablename_val, p, NULL))
       {
         /* Another thread already installed the value.  */
         free (p);
         grp_tablename_len = strlen (grp_tablename_val);
       }
    }

  return NSS_STATUS_SUCCESS;
}

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Definition at line 156 of file nisplus-grp.c.

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enum nss_status _nss_nisplus_getgrent_r ( struct group result,
char *  buffer,
size_t  buflen,
int errnop 
)

Definition at line 273 of file nisplus-grp.c.

{
  int status;

  __libc_lock_lock (lock);

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

  __libc_lock_unlock (lock);

  return status;
}

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enum nss_status _nss_nisplus_getgrgid_r ( const gid_t  gid,
struct group gr,
char *  buffer,
size_t  buflen,
int errnop 
)

Definition at line 349 of file nisplus-grp.c.

{
  if (grp_tablename_val == NULL)
    {
      enum nss_status status = _nss_grp_create_tablename (errnop);

      if (status != NSS_STATUS_SUCCESS)
       return status;
    }

  int parse_res;
  nis_result *result;
  char buf[8 + 3 * sizeof (unsigned long int) + grp_tablename_len];
  int olderr = errno;

  snprintf (buf, sizeof (buf), "[gid=%lu],%s",
           (unsigned long int) gid, grp_tablename_val);

  result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);

  if (result == NULL)
    {
      *errnop = ENOMEM;
      return NSS_STATUS_TRYAGAIN;
    }

  if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0))
    {
      enum nss_status status = niserr2nss (result->status);

      __set_errno (olderr);

      nis_freeresult (result);
      return status;
    }

  parse_res = _nss_nisplus_parse_grent (result, gr, buffer, buflen, errnop);

  nis_freeresult (result);
  if (__builtin_expect (parse_res < 1, 0))
    {
      __set_errno (olderr);

      if (parse_res == -1)
       {
         *errnop = ERANGE;
         return NSS_STATUS_TRYAGAIN;
       }
      else
       return NSS_STATUS_NOTFOUND;
    }

  return NSS_STATUS_SUCCESS;
}

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

Definition at line 288 of file nisplus-grp.c.

{
  int parse_res;

  if (grp_tablename_val == NULL)
    {
      enum nss_status status = _nss_grp_create_tablename (errnop);

      if (status != NSS_STATUS_SUCCESS)
       return status;
    }

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

  nis_result *result;
  char buf[strlen (name) + 9 + grp_tablename_len];
  int olderr = errno;

  snprintf (buf, sizeof (buf), "[name=%s],%s", name, grp_tablename_val);

  result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);

  if (result == NULL)
    {
      *errnop = ENOMEM;
      return NSS_STATUS_TRYAGAIN;
    }

  if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0))
    {
      enum nss_status status = niserr2nss (result->status);

      nis_freeresult (result);
      return status;
    }

  parse_res = _nss_nisplus_parse_grent (result, gr, buffer, buflen, errnop);
  nis_freeresult (result);
  if (__builtin_expect (parse_res < 1, 0))
    {
      if (parse_res == -1)
       {
         *errnop = ERANGE;
         return NSS_STATUS_TRYAGAIN;
       }
      else
       {
         __set_errno (olderr);
         return NSS_STATUS_NOTFOUND;
       }
    }

  return NSS_STATUS_SUCCESS;
}

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enum nss_status _nss_nisplus_setgrent ( int  stayopen)

Definition at line 137 of file nisplus-grp.c.

{
  enum nss_status status;

  __libc_lock_lock (lock);

  internal_endgrent ();

  // XXX We need to be able to set errno.  Pass in new parameter.
  int err;
  status = internal_setgrent (&err);

  __libc_lock_unlock (lock);

  return status;
}

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static void internal_endgrent ( void  ) [static]

Definition at line 87 of file nisplus-grp.c.

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

Definition at line 169 of file nisplus-grp.c.

{
  int parse_res = -1;
  enum nss_status retval = NSS_STATUS_SUCCESS;

  /* Get the next entry until we found a correct one. */
  do
    {
      nis_error status;
      nis_result result;
      memset (&result, '\0', sizeof (result));

      if (cursor.n_bytes == NULL)
       {
         if (ibreq == NULL)
           {
             retval = internal_setgrent (errnop);
             if (retval != NSS_STATUS_SUCCESS)
              return retval;
           }

         status = __do_niscall3 (&bptr, NIS_IBFIRST,
                              (xdrproc_t) _xdr_ib_request,
                              (caddr_t) ibreq,
                              (xdrproc_t) _xdr_nis_result,
                              (caddr_t) &result,
                              0, NULL);
       }
      else
       {
         ibreq->ibr_cookie.n_bytes = cursor.n_bytes;
         ibreq->ibr_cookie.n_len = cursor.n_len;

         status = __do_niscall3 (&bptr, NIS_IBNEXT,
                              (xdrproc_t) _xdr_ib_request,
                              (caddr_t) ibreq,
                              (xdrproc_t) _xdr_nis_result,
                              (caddr_t) &result,
                              0, NULL);

         ibreq->ibr_cookie.n_bytes = NULL;
         ibreq->ibr_cookie.n_len = 0;
       }

      if (status != NIS_SUCCESS)
       return niserr2nss (status);

      if (NIS_RES_STATUS (&result) == NIS_NOTFOUND)
       {
         /* No more entries on this server.  This means we have to go
            to the next server on the path.  */
         status = __follow_path (&tablepath, &tableptr, ibreq, &bptr);
         if (status != NIS_SUCCESS)
           return niserr2nss (status);

         directory_obj *newdir = NULL;
         dir_binding newbptr;
         status = __prepare_niscall (ibreq->ibr_name, &newdir, &newbptr, 0);
         if (status != NIS_SUCCESS)
           return niserr2nss (status);

         nis_free_directory (dir);
         dir = newdir;
         __nisbind_destroy (&bptr);
         bptr = newbptr;

         xdr_free ((xdrproc_t) xdr_netobj, (char *) &result.cookie);
         result.cookie.n_bytes = NULL;
         result.cookie.n_len = 0;
         parse_res = 0;
         goto next;
       }
      else if (NIS_RES_STATUS (&result) != NIS_SUCCESS)
       return niserr2nss (NIS_RES_STATUS (&result));

      parse_res = _nss_nisplus_parse_grent (&result, gr,
                                       buffer, buflen, errnop);
      if (__builtin_expect (parse_res == -1, 0))
       {
         *errnop = ERANGE;
         retval = NSS_STATUS_TRYAGAIN;
         goto freeres;
       }

    next:
      /* Free the old cursor.  */
      xdr_free ((xdrproc_t) xdr_netobj, (char *) &cursor);
      /* Remember the new one.  */
      cursor.n_bytes = result.cookie.n_bytes;
      cursor.n_len = result.cookie.n_len;
      /* Free the result structure.  NB: we do not remove the cookie.  */
      result.cookie.n_bytes = NULL;
      result.cookie.n_len = 0;
    freeres:
      xdr_free ((xdrproc_t) _xdr_nis_result, (char *) &result);
      memset (&result, '\0', sizeof (result));
    }
  while (!parse_res);

  return retval;
}

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static enum nss_status internal_setgrent ( int errnop) [static]

Definition at line 107 of file nisplus-grp.c.

{
  enum nss_status status = NSS_STATUS_SUCCESS;

  if (grp_tablename_val == NULL)
    status = _nss_grp_create_tablename (errnop);

  if (status == NSS_STATUS_SUCCESS)
    {
      ibreq = __create_ib_request (grp_tablename_val, 0);
      if (ibreq == NULL)
       {
         *errnop = errno;
         return NSS_STATUS_TRYAGAIN;
       }

      nis_error retcode = __prepare_niscall (grp_tablename_val, &dir, &bptr, 0);
      if (retcode != NIS_SUCCESS)
       {
         nis_free_request (ibreq);
         ibreq = NULL;
         status = niserr2nss (retcode);
       }
    }

  return status;
}

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Variable Documentation

size_t grp_tablename_len attribute_hidden

Definition at line 49 of file nisplus-grp.c.

dir_binding bptr [static]

Definition at line 42 of file nisplus-grp.c.

netobj cursor [static]

Definition at line 46 of file nisplus-grp.c.

directory_obj* dir [static]

Definition at line 41 of file nisplus-grp.c.

ib_request* ibreq [static]

Definition at line 40 of file nisplus-grp.c.

char* tablepath [static]

Definition at line 43 of file nisplus-grp.c.

char* tableptr [static]

Definition at line 44 of file nisplus-grp.c.