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glibc  2.9
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compat-pwd.c File Reference
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <nss.h>
#include <nsswitch.h>
#include <pwd.h>
#include <stdio_ext.h>
#include <string.h>
#include <rpc/types.h>
#include <rpcsvc/ypclnt.h>
#include <bits/libc-lock.h>
#include <kernel-features.h>
#include "netgroup.h"
#include <nss/nss_files/files-parse.c>

Go to the source code of this file.

Classes

struct  blacklist_t
struct  ent_t

Defines

#define ENTNAME   pwent
#define STRUCTURE   passwd
#define EXTERN_PARSER
#define BLACKLIST_INITIAL_SIZE   512
#define BLACKLIST_INCREMENT   256
#define __compat_have_cloexec   -1

Typedefs

typedef struct ent_t

Functions

 __libc_lock_define_initialized (static, lock)
static void give_pwd_free (struct passwd *pwd)
static size_t pwd_need_buflen (struct passwd *pwd)
static void copy_pwd_changes (struct passwd *dest, struct passwd *src, char *buffer, size_t buflen)
static enum nss_status internal_setpwent (ent_t *ent, int stayopen, int needent)
enum nss_status _nss_compat_setpwent (int stayopen)
static enum nss_status internal_endpwent (ent_t *ent)
enum nss_status _nss_compat_endpwent (void)
static enum nss_status getpwent_next_nss_netgr (const char *name, struct passwd *result, ent_t *ent, char *group, char *buffer, size_t buflen, int *errnop)
static enum nss_status getpwent_next_nss (struct passwd *result, ent_t *ent, char *buffer, size_t buflen, int *errnop)
static enum nss_status getpwnam_plususer (const char *name, struct passwd *result, ent_t *ent, char *buffer, size_t buflen, int *errnop)
static enum nss_status getpwent_next_file (struct passwd *result, ent_t *ent, char *buffer, size_t buflen, int *errnop)
static enum nss_status internal_getpwent_r (struct passwd *pw, ent_t *ent, char *buffer, size_t buflen, int *errnop)
enum nss_status _nss_compat_getpwent_r (struct passwd *pwd, char *buffer, size_t buflen, int *errnop)
static enum nss_status internal_getpwnam_r (const char *name, struct passwd *result, ent_t *ent, char *buffer, size_t buflen, int *errnop)
enum nss_status _nss_compat_getpwnam_r (const char *name, struct passwd *pwd, char *buffer, size_t buflen, int *errnop)
static enum nss_status getpwuid_plususer (uid_t uid, struct passwd *result, char *buffer, size_t buflen, int *errnop)
static enum nss_status internal_getpwuid_r (uid_t uid, struct passwd *result, ent_t *ent, char *buffer, size_t buflen, int *errnop)
enum nss_status _nss_compat_getpwuid_r (uid_t uid, struct passwd *pwd, char *buffer, size_t buflen, int *errnop)
static void blacklist_store_name (const char *name, ent_t *ent)
static bool_t in_blacklist (const char *name, int namelen, ent_t *ent)

Variables

static service_userni
static enum nss_status(* nss_setpwent )(int stayopen)
static enum nss_status(* nss_getpwnam_r )(const char *name, struct passwd *pwd, char *buffer, size_t buflen, int *errnop)
static enum nss_status(* nss_getpwuid_r )(uid_t uid, struct passwd *pwd, char *buffer, size_t buflen, int *errnop)
static enum nss_status(* nss_getpwent_r )(struct passwd *pwd, char *buffer, size_t buflen, int *errnop)
static enum nss_status(* nss_endpwent )(void)
static ent_t ext_ent

Class Documentation

struct blacklist_t

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

Class Members
int current
char * data
int size
struct ent_t

Definition at line 60 of file compat-grp.c.

Class Members
enum nss_status FILE *stream struct blacklist_t
bool_t files
bool files
bool first
bool netgroup
FILE * stream

Define Documentation

#define __compat_have_cloexec   -1
#define BLACKLIST_INCREMENT   256

Definition at line 56 of file compat-pwd.c.

#define BLACKLIST_INITIAL_SIZE   512

Definition at line 55 of file compat-pwd.c.

#define ENTNAME   pwent

Definition at line 49 of file compat-pwd.c.

#define EXTERN_PARSER

Definition at line 51 of file compat-pwd.c.

#define STRUCTURE   passwd

Definition at line 50 of file compat-pwd.c.


Typedef Documentation

typedef struct ent_t

Definition at line 75 of file compat-pwd.c.


Function Documentation

__libc_lock_define_initialized ( static  ,
lock   
)

Definition at line 82 of file compat-pwd.c.

{
  if (__nss_database_lookup ("passwd_compat", NULL, "nis", &ni) >= 0)
    {
      nss_setpwent = __nss_lookup_function (ni, "setpwent");
      nss_getpwnam_r = __nss_lookup_function (ni, "getpwnam_r");
      nss_getpwuid_r = __nss_lookup_function (ni, "getpwuid_r");
      nss_getpwent_r = __nss_lookup_function (ni, "getpwent_r");
      nss_endpwent = __nss_lookup_function (ni, "endpwent");
    }
}

Definition at line 344 of file compat-pwd.c.

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enum nss_status _nss_compat_getpwent_r ( struct passwd pwd,
char *  buffer,
size_t  buflen,
int errnop 
)

Definition at line 693 of file compat-pwd.c.

{
  enum nss_status result = NSS_STATUS_SUCCESS;

  __libc_lock_lock (lock);

  /* Be prepared that the setpwent function was not called before.  */
  if (ni == NULL)
    init_nss_interface ();

  if (ext_ent.stream == NULL)
    result = internal_setpwent (&ext_ent, 1, 1);

  if (result == NSS_STATUS_SUCCESS)
    result = internal_getpwent_r (pwd, &ext_ent, buffer, buflen, errnop);

  __libc_lock_unlock (lock);

  return result;
}

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enum nss_status _nss_compat_getpwnam_r ( const char *  name,
struct passwd pwd,
char *  buffer,
size_t  buflen,
int errnop 
)

Definition at line 853 of file compat-pwd.c.

{
  enum nss_status result;
  ent_t ent = { false, false, true, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 },
              { NULL, NULL, 0, 0, NULL, NULL, NULL }};

  if (name[0] == '-' || name[0] == '+')
    return NSS_STATUS_NOTFOUND;

  __libc_lock_lock (lock);

  if (ni == NULL)
    init_nss_interface ();

  __libc_lock_unlock (lock);

  result = internal_setpwent (&ent, 0, 0);

  if (result == NSS_STATUS_SUCCESS)
    result = internal_getpwnam_r (name, pwd, &ent, buffer, buflen, errnop);

  internal_endpwent (&ent);

  return result;
}

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enum nss_status _nss_compat_getpwuid_r ( uid_t  uid,
struct passwd pwd,
char *  buffer,
size_t  buflen,
int errnop 
)

Definition at line 1095 of file compat-pwd.c.

{
  enum nss_status result;
  ent_t ent = { false, false, true, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 },
              { NULL, NULL, 0, 0, NULL, NULL, NULL }};

  __libc_lock_lock (lock);

  if (ni == NULL)
    init_nss_interface ();

  __libc_lock_unlock (lock);

  result = internal_setpwent (&ent, 0, 0);

  if (result == NSS_STATUS_SUCCESS)
    result = internal_getpwuid_r (uid, pwd, &ent, buffer, buflen, errnop);

  internal_endpwent (&ent);

  return result;
}

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enum nss_status _nss_compat_setpwent ( int  stayopen)

Definition at line 295 of file compat-pwd.c.

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static void blacklist_store_name ( const char *  name,
ent_t ent 
) [static]

Definition at line 1123 of file compat-pwd.c.

{
  int namelen = strlen (name);
  char *tmp;

  /* first call, setup cache */
  if (ent->blacklist.size == 0)
    {
      ent->blacklist.size = MAX (BLACKLIST_INITIAL_SIZE, 2 * namelen);
      ent->blacklist.data = malloc (ent->blacklist.size);
      if (ent->blacklist.data == NULL)
       return;
      ent->blacklist.data[0] = '|';
      ent->blacklist.data[1] = '\0';
      ent->blacklist.current = 1;
    }
  else
    {
      if (in_blacklist (name, namelen, ent))
       return;                     /* no duplicates */

      if (ent->blacklist.current + namelen + 1 >= ent->blacklist.size)
       {
         ent->blacklist.size += MAX (BLACKLIST_INCREMENT, 2 * namelen);
         tmp = realloc (ent->blacklist.data, ent->blacklist.size);
         if (tmp == NULL)
           {
             free (ent->blacklist.data);
             ent->blacklist.size = 0;
             return;
           }
         ent->blacklist.data = tmp;
       }
    }

  tmp = stpcpy (ent->blacklist.data + ent->blacklist.current, name);
  *tmp++ = '|';
  *tmp = '\0';
  ent->blacklist.current += namelen + 1;

  return;
}

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static void copy_pwd_changes ( struct passwd dest,
struct passwd src,
char *  buffer,
size_t  buflen 
) [static]

Definition at line 149 of file compat-pwd.c.

{
  if (src->pw_passwd != NULL && strlen (src->pw_passwd))
    {
      if (buffer == NULL)
       dest->pw_passwd = strdup (src->pw_passwd);
      else if (dest->pw_passwd &&
              strlen (dest->pw_passwd) >= strlen (src->pw_passwd))
       strcpy (dest->pw_passwd, src->pw_passwd);
      else
       {
         dest->pw_passwd = buffer;
         strcpy (dest->pw_passwd, src->pw_passwd);
         buffer += strlen (dest->pw_passwd) + 1;
         buflen = buflen - (strlen (dest->pw_passwd) + 1);
       }
    }

  if (src->pw_gecos != NULL && strlen (src->pw_gecos))
    {
      if (buffer == NULL)
       dest->pw_gecos = strdup (src->pw_gecos);
      else if (dest->pw_gecos &&
              strlen (dest->pw_gecos) >= strlen (src->pw_gecos))
       strcpy (dest->pw_gecos, src->pw_gecos);
      else
       {
         dest->pw_gecos = buffer;
         strcpy (dest->pw_gecos, src->pw_gecos);
         buffer += strlen (dest->pw_gecos) + 1;
         buflen = buflen - (strlen (dest->pw_gecos) + 1);
       }
    }
  if (src->pw_dir != NULL && strlen (src->pw_dir))
    {
      if (buffer == NULL)
       dest->pw_dir = strdup (src->pw_dir);
      else if (dest->pw_dir && strlen (dest->pw_dir) >= strlen (src->pw_dir))
       strcpy (dest->pw_dir, src->pw_dir);
      else
       {
         dest->pw_dir = buffer;
         strcpy (dest->pw_dir, src->pw_dir);
         buffer += strlen (dest->pw_dir) + 1;
         buflen = buflen - (strlen (dest->pw_dir) + 1);
       }
    }

  if (src->pw_shell != NULL && strlen (src->pw_shell))
    {
      if (buffer == NULL)
       dest->pw_shell = strdup (src->pw_shell);
      else if (dest->pw_shell &&
              strlen (dest->pw_shell) >= strlen (src->pw_shell))
       strcpy (dest->pw_shell, src->pw_shell);
      else
       {
         dest->pw_shell = buffer;
         strcpy (dest->pw_shell, src->pw_shell);
         buffer += strlen (dest->pw_shell) + 1;
         buflen = buflen - (strlen (dest->pw_shell) + 1);
       }
    }
}

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static enum nss_status getpwent_next_file ( struct passwd result,
ent_t ent,
char *  buffer,
size_t  buflen,
int errnop 
) [static]

Definition at line 519 of file compat-pwd.c.

{
  struct parser_data *data = (void *) buffer;
  while (1)
    {
      fpos_t pos;
      char *p;
      int parse_res;

      do
       {
         /* We need at least 3 characters for one line.  */
         if (__builtin_expect (buflen < 3, 0))
           {
           erange:
             *errnop = ERANGE;
             return NSS_STATUS_TRYAGAIN;
           }

         fgetpos (ent->stream, &pos);
         buffer[buflen - 1] = '\xff';
         p = fgets_unlocked (buffer, buflen, ent->stream);
         if (p == NULL && feof_unlocked (ent->stream))
           return NSS_STATUS_NOTFOUND;

         if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
           {
           erange_reset:
             fsetpos (ent->stream, &pos);
             goto erange;
           }

         /* Terminate the line for any case.  */
         buffer[buflen - 1] = '\0';

         /* Skip leading blanks.  */
         while (isspace (*p))
           ++p;
       }
      while (*p == '\0' || *p == '#' ||   /* Ignore empty and comment lines.  */
            /* Parse the line.  If it is invalid, loop to
               get the next line of the file to parse.  */
            !(parse_res = _nss_files_parse_pwent (p, result, data, buflen,
                                             errnop)));

      if (__builtin_expect (parse_res == -1, 0))
       /* The parser ran out of space.  */
       goto erange_reset;

      if (result->pw_name[0] != '+' && result->pw_name[0] != '-')
       /* This is a real entry.  */
       break;

      /* -@netgroup */
      if (result->pw_name[0] == '-' && result->pw_name[1] == '@'
         && result->pw_name[2] != '\0')
       {
         /* XXX Do not use fixed length buffer.  */
         char buf2[1024];
         char *user, *host, *domain;
         struct __netgrent netgrdata;

         bzero (&netgrdata, sizeof (struct __netgrent));
         __internal_setnetgrent (&result->pw_name[2], &netgrdata);
         while (__internal_getnetgrent_r (&host, &user, &domain, &netgrdata,
                                      buf2, sizeof (buf2), errnop))
           {
             if (user != NULL && user[0] != '-')
              blacklist_store_name (user, ent);
           }
         __internal_endnetgrent (&netgrdata);
         continue;
       }

      /* +@netgroup */
      if (result->pw_name[0] == '+' && result->pw_name[1] == '@'
         && result->pw_name[2] != '\0')
       {
         enum nss_status status;

         ent->netgroup = true;
         ent->first = true;
         copy_pwd_changes (&ent->pwd, result, NULL, 0);

         status = getpwent_next_nss_netgr (NULL, result, ent,
                                       &result->pw_name[2],
                                       buffer, buflen, errnop);
         if (status == NSS_STATUS_RETURN)
           continue;
         else
           return status;
       }

      /* -user */
      if (result->pw_name[0] == '-' && result->pw_name[1] != '\0'
         && result->pw_name[1] != '@')
       {
         blacklist_store_name (&result->pw_name[1], ent);
         continue;
       }

      /* +user */
      if (result->pw_name[0] == '+' && result->pw_name[1] != '\0'
         && result->pw_name[1] != '@')
       {
         size_t len = strlen (result->pw_name);
         char buf[len];
         enum nss_status status;

         /* Store the User in the blacklist for the "+" at the end of
            /etc/passwd */
         memcpy (buf, &result->pw_name[1], len);
         status = getpwnam_plususer (&result->pw_name[1], result, ent,
                                  buffer, buflen, errnop);
         blacklist_store_name (buf, ent);

         if (status == NSS_STATUS_SUCCESS)       /* We found the entry. */
           break;
         else if (status == NSS_STATUS_RETURN    /* We couldn't parse the entry */
                 || status == NSS_STATUS_NOTFOUND)      /* entry doesn't exist */
           continue;
         else
           {
             if (status == NSS_STATUS_TRYAGAIN)
              {
                /* The parser ran out of space */
                fsetpos (ent->stream, &pos);
                *errnop = ERANGE;
              }
             return status;
           }
       }

      /* +:... */
      if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
       {
         ent->files = false;
         ent->first = true;
         copy_pwd_changes (&ent->pwd, result, NULL, 0);

         return getpwent_next_nss (result, ent, buffer, buflen, errnop);
       }
    }

  return NSS_STATUS_SUCCESS;
}

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static enum nss_status getpwent_next_nss ( struct passwd result,
ent_t ent,
char *  buffer,
size_t  buflen,
int errnop 
) [static]

Definition at line 442 of file compat-pwd.c.

{
  enum nss_status status;
  char *p2;
  size_t p2len;

  /* Return if NSS module does not support getpwent_r.  */
  if (!nss_getpwent_r)
    return NSS_STATUS_UNAVAIL;

  /* If the setpwent call failed, say so.  */
  if (ent->setent_status != NSS_STATUS_SUCCESS)
    return ent->setent_status;

  p2len = pwd_need_buflen (&ent->pwd);
  if (p2len > buflen)
    {
      *errnop = ERANGE;
      return NSS_STATUS_TRYAGAIN;
    }
  p2 = buffer + (buflen - p2len);
  buflen -= p2len;

  if (ent->first)
    ent->first = false;

  do
    {
      if ((status = nss_getpwent_r (result, buffer, buflen, errnop)) !=
         NSS_STATUS_SUCCESS)
       return status;
    }
  while (in_blacklist (result->pw_name, strlen (result->pw_name), ent));

  copy_pwd_changes (result, &ent->pwd, p2, p2len);

  return NSS_STATUS_SUCCESS;
}

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static enum nss_status getpwent_next_nss_netgr ( const char *  name,
struct passwd result,
ent_t ent,
char *  group,
char *  buffer,
size_t  buflen,
int errnop 
) [static]

Definition at line 359 of file compat-pwd.c.

{
  char *curdomain, *host, *user, *domain, *p2;
  int status;
  size_t p2len;

  /* Leave function if NSS module does not support getpwnam_r,
     we need this function here.  */
  if (!nss_getpwnam_r)
    return NSS_STATUS_UNAVAIL;

  if (yp_get_default_domain (&curdomain) != YPERR_SUCCESS)
    {
      ent->netgroup = false;
      ent->first = false;
      give_pwd_free (&ent->pwd);
      return NSS_STATUS_UNAVAIL;
    }

  if (ent->first == true)
    {
      memset (&ent->netgrdata, 0, sizeof (struct __netgrent));
      __internal_setnetgrent (group, &ent->netgrdata);
      ent->first = false;
    }

  while (1)
    {
      char *saved_cursor;

      saved_cursor = ent->netgrdata.cursor;
      status = __internal_getnetgrent_r (&host, &user, &domain,
                                    &ent->netgrdata, buffer, buflen,
                                    errnop);
      if (status != 1)
       {
         __internal_endnetgrent (&ent->netgrdata);
         ent->netgroup = 0;
         give_pwd_free (&ent->pwd);
         return NSS_STATUS_RETURN;
       }

      if (user == NULL || user[0] == '-')
       continue;

      if (domain != NULL && strcmp (curdomain, domain) != 0)
       continue;

      /* If name != NULL, we are called from getpwnam.  */
      if (name != NULL)
       if (strcmp (user, name) != 0)
         continue;

      p2len = pwd_need_buflen (&ent->pwd);
      if (p2len > buflen)
       {
         *errnop = ERANGE;
         return NSS_STATUS_TRYAGAIN;
       }
      p2 = buffer + (buflen - p2len);
      buflen -= p2len;

      if (nss_getpwnam_r (user, result, buffer, buflen, errnop) !=
         NSS_STATUS_SUCCESS)
       continue;

      if (!in_blacklist (result->pw_name, strlen (result->pw_name), ent))
       {
         /* Store the User in the blacklist for possible the "+" at the
            end of /etc/passwd */
         blacklist_store_name (result->pw_name, ent);
         copy_pwd_changes (result, &ent->pwd, p2, p2len);
         break;
       }
    }

  return NSS_STATUS_SUCCESS;
}

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static enum nss_status getpwnam_plususer ( const char *  name,
struct passwd result,
ent_t ent,
char *  buffer,
size_t  buflen,
int errnop 
) [static]

Definition at line 484 of file compat-pwd.c.

{
  if (!nss_getpwnam_r)
    return NSS_STATUS_UNAVAIL;

  struct passwd pwd;
  memset (&pwd, '\0', sizeof (struct passwd));

  copy_pwd_changes (&pwd, result, NULL, 0);

  size_t plen = pwd_need_buflen (&pwd);
  if (plen > buflen)
    {
      *errnop = ERANGE;
      return NSS_STATUS_TRYAGAIN;
    }
  char *p = buffer + (buflen - plen);
  buflen -= plen;

  enum nss_status status = nss_getpwnam_r (name, result, buffer, buflen,
                                      errnop);
  if (status != NSS_STATUS_SUCCESS)
    return status;

  if (in_blacklist (result->pw_name, strlen (result->pw_name), ent))
    return NSS_STATUS_NOTFOUND;

  copy_pwd_changes (result, &pwd, p, plen);
  give_pwd_free (&pwd);
  /* We found the entry.  */
  return NSS_STATUS_SUCCESS;
}

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static enum nss_status getpwuid_plususer ( uid_t  uid,
struct passwd result,
char *  buffer,
size_t  buflen,
int errnop 
) [static]

Definition at line 882 of file compat-pwd.c.

{
  struct passwd pwd;
  char *p;
  size_t plen;

  if (!nss_getpwuid_r)
    return NSS_STATUS_UNAVAIL;

  memset (&pwd, '\0', sizeof (struct passwd));

  copy_pwd_changes (&pwd, result, NULL, 0);

  plen = pwd_need_buflen (&pwd);
  if (plen > buflen)
    {
      *errnop = ERANGE;
      return NSS_STATUS_TRYAGAIN;
    }
  p = buffer + (buflen - plen);
  buflen -= plen;

  if (nss_getpwuid_r (uid, result, buffer, buflen, errnop) ==
      NSS_STATUS_SUCCESS)
    {
      copy_pwd_changes (result, &pwd, p, plen);
      give_pwd_free (&pwd);
      /* We found the entry.  */
      return NSS_STATUS_SUCCESS;
    }
  else
    {
      /* Give buffer the old len back */
      buflen += plen;
      give_pwd_free (&pwd);
    }
  return NSS_STATUS_RETURN;
}

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static void give_pwd_free ( struct passwd pwd) [static]

Definition at line 117 of file compat-pwd.c.

{
  free (pwd->pw_name);
  free (pwd->pw_passwd);
  free (pwd->pw_gecos);
  free (pwd->pw_dir);
  free (pwd->pw_shell);

  memset (pwd, '\0', sizeof (struct passwd));
}

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static bool_t in_blacklist ( const char *  name,
int  namelen,
ent_t ent 
) [static]

Definition at line 1168 of file compat-pwd.c.

{
  char buf[namelen + 3];
  char *cp;

  if (ent->blacklist.data == NULL)
    return FALSE;

  buf[0] = '|';
  cp = stpcpy (&buf[1], name);
  *cp++ = '|';
  *cp = '\0';
  return strstr (ent->blacklist.data, buf) != NULL;
}

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static enum nss_status internal_endpwent ( ent_t ent) [static]

Definition at line 313 of file compat-pwd.c.

{
  if (nss_endpwent)
    nss_endpwent ();

  if (ent->stream != NULL)
    {
      fclose (ent->stream);
      ent->stream = NULL;
    }

  if (ent->netgroup)
    __internal_endnetgrent (&ent->netgrdata);

  ent->first = ent->netgroup = false;

  if (ent->blacklist.data != NULL)
    {
      ent->blacklist.current = 1;
      ent->blacklist.data[0] = '|';
      ent->blacklist.data[1] = '\0';
    }
  else
    ent->blacklist.current = 0;

  give_pwd_free (&ent->pwd);

  return NSS_STATUS_SUCCESS;
}

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static enum nss_status internal_getpwent_r ( struct passwd pw,
ent_t ent,
char *  buffer,
size_t  buflen,
int errnop 
) [static]

Definition at line 669 of file compat-pwd.c.

{
  if (ent->netgroup)
    {
      enum nss_status status;

      /* We are searching members in a netgroup */
      /* Since this is not the first call, we don't need the group name */
      status = getpwent_next_nss_netgr (NULL, pw, ent, NULL, buffer, buflen,
                                   errnop);
      if (status == NSS_STATUS_RETURN)
       return getpwent_next_file (pw, ent, buffer, buflen, errnop);
      else
       return status;
    }
  else if (ent->files)
    return getpwent_next_file (pw, ent, buffer, buflen, errnop);
  else
    return getpwent_next_nss (pw, ent, buffer, buflen, errnop);

}

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static enum nss_status internal_getpwnam_r ( const char *  name,
struct passwd result,
ent_t ent,
char *  buffer,
size_t  buflen,
int errnop 
) [static]

Definition at line 717 of file compat-pwd.c.

{
  struct parser_data *data = (void *) buffer;

  while (1)
    {
      fpos_t pos;
      char *p;
      int parse_res;

      do
       {
         /* We need at least 3 characters for one line.  */
         if (__builtin_expect (buflen < 3, 0))
           {
           erange:
             *errnop = ERANGE;
             return NSS_STATUS_TRYAGAIN;
           }

         fgetpos (ent->stream, &pos);
         buffer[buflen - 1] = '\xff';
         p = fgets_unlocked (buffer, buflen, ent->stream);
         if (p == NULL && feof_unlocked (ent->stream))
           {
             return NSS_STATUS_NOTFOUND;
           }
         if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
           {
           erange_reset:
             fsetpos (ent->stream, &pos);
             goto erange;
           }

         /* Terminate the line for any case.  */
         buffer[buflen - 1] = '\0';

         /* Skip leading blanks.  */
         while (isspace (*p))
           ++p;
       }
      while (*p == '\0' || *p == '#' ||   /* Ignore empty and comment lines.  */
            /* Parse the line.  If it is invalid, loop to
               get the next line of the file to parse.  */
            !(parse_res = _nss_files_parse_pwent (p, result, data, buflen,
                                             errnop)));

      if (__builtin_expect (parse_res == -1, 0))
       /* The parser ran out of space.  */
       goto erange_reset;

      /* This is a real entry.  */
      if (result->pw_name[0] != '+' && result->pw_name[0] != '-')
       {
         if (strcmp (result->pw_name, name) == 0)
           return NSS_STATUS_SUCCESS;
         else
           continue;
       }

      /* -@netgroup */
      if (result->pw_name[0] == '-' && result->pw_name[1] == '@'
         && result->pw_name[2] != '\0')
       {
         if (innetgr (&result->pw_name[2], NULL, name, NULL))
           return NSS_STATUS_NOTFOUND;
         continue;
       }

      /* +@netgroup */
      if (result->pw_name[0] == '+' && result->pw_name[1] == '@'
         && result->pw_name[2] != '\0')
       {
         enum nss_status status;

         if (innetgr (&result->pw_name[2], NULL, name, NULL))
           {
             status = getpwnam_plususer (name, result, ent, buffer,
                                     buflen, errnop);

             if (status == NSS_STATUS_RETURN)
              continue;

             return status;
           }
         continue;
       }

      /* -user */
      if (result->pw_name[0] == '-' && result->pw_name[1] != '\0'
         && result->pw_name[1] != '@')
       {
         if (strcmp (&result->pw_name[1], name) == 0)
           return NSS_STATUS_NOTFOUND;
         else
           continue;
       }

      /* +user */
      if (result->pw_name[0] == '+' && result->pw_name[1] != '\0'
         && result->pw_name[1] != '@')
       {
         if (strcmp (name, &result->pw_name[1]) == 0)
           {
             enum nss_status status;

             status = getpwnam_plususer (name, result, ent, buffer, buflen,
                                     errnop);
             if (status == NSS_STATUS_RETURN)
              /* We couldn't parse the entry */
              return NSS_STATUS_NOTFOUND;
             else
              return status;
           }
       }

      /* +:... */
      if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
       {
         enum nss_status status;

         status = getpwnam_plususer (name, result, ent,
                                  buffer, buflen, errnop);
         if (status == NSS_STATUS_SUCCESS)       /* We found the entry. */
           break;
         else if (status == NSS_STATUS_RETURN)   /* We couldn't parse the entry */
           return NSS_STATUS_NOTFOUND;
         else
           return status;
       }
    }
  return NSS_STATUS_SUCCESS;
}

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static enum nss_status internal_getpwuid_r ( uid_t  uid,
struct passwd result,
ent_t ent,
char *  buffer,
size_t  buflen,
int errnop 
) [static]

Definition at line 924 of file compat-pwd.c.

{
  struct parser_data *data = (void *) buffer;

  while (1)
    {
      fpos_t pos;
      char *p;
      int parse_res;

      do
       {
         /* We need at least 3 characters for one line.  */
         if (__builtin_expect (buflen < 3, 0))
           {
           erange:
             *errnop = ERANGE;
             return NSS_STATUS_TRYAGAIN;
           }

         fgetpos (ent->stream, &pos);
         buffer[buflen - 1] = '\xff';
         p = fgets_unlocked (buffer, buflen, ent->stream);
         if (p == NULL && feof_unlocked (ent->stream))
           return NSS_STATUS_NOTFOUND;

         if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
           {
           erange_reset:
             fsetpos (ent->stream, &pos);
             goto erange;
           }

         /* Terminate the line for any case.  */
         buffer[buflen - 1] = '\0';

         /* Skip leading blanks.  */
         while (isspace (*p))
           ++p;
       }
      while (*p == '\0' || *p == '#' ||   /* Ignore empty and comment lines.  */
            /* Parse the line.  If it is invalid, loop to
               get the next line of the file to parse.  */
            !(parse_res = _nss_files_parse_pwent (p, result, data, buflen,
                                             errnop)));

      if (__builtin_expect (parse_res == -1, 0))
       /* The parser ran out of space.  */
       goto erange_reset;

      /* This is a real entry.  */
      if (result->pw_name[0] != '+' && result->pw_name[0] != '-')
       {
         if (result->pw_uid == uid)
           return NSS_STATUS_SUCCESS;
         else
           continue;
       }

      /* -@netgroup */
      if (result->pw_name[0] == '-' && result->pw_name[1] == '@'
         && result->pw_name[2] != '\0')
       {
         /* -1, because we remove first two character of pw_name.  */
         size_t len = strlen (result->pw_name) - 1;
         char buf[len];
         enum nss_status status;

         memcpy (buf, &result->pw_name[2], len);

         status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
         if (status == NSS_STATUS_SUCCESS &&
             innetgr (buf, NULL, result->pw_name, NULL))
           return NSS_STATUS_NOTFOUND;

         continue;
       }

      /* +@netgroup */
      if (result->pw_name[0] == '+' && result->pw_name[1] == '@'
         && result->pw_name[2] != '\0')
       {
         /* -1, because we remove first two characters of pw_name.  */
         size_t len = strlen (result->pw_name) - 1;
         char buf[len];
         enum nss_status status;

         memcpy (buf, &result->pw_name[2], len);

         status = getpwuid_plususer (uid, result, buffer, buflen, errnop);

         if (status == NSS_STATUS_RETURN)
           continue;

         if (status == NSS_STATUS_SUCCESS)
           {
             if (innetgr (buf, NULL, result->pw_name, NULL))
              return NSS_STATUS_SUCCESS;
           }
         else if (status == NSS_STATUS_RETURN)   /* We couldn't parse the entry */
           return NSS_STATUS_NOTFOUND;
         else
           return status;

         continue;
       }

      /* -user */
      if (result->pw_name[0] == '-' && result->pw_name[1] != '\0'
         && result->pw_name[1] != '@')
       {
         size_t len = strlen (result->pw_name);
         char buf[len];
         enum nss_status status;

         memcpy (buf, &result->pw_name[1], len);

         status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
         if (status == NSS_STATUS_SUCCESS &&
             innetgr (buf, NULL, result->pw_name, NULL))
           return NSS_STATUS_NOTFOUND;
         continue;
       }

      /* +user */
      if (result->pw_name[0] == '+' && result->pw_name[1] != '\0'
         && result->pw_name[1] != '@')
       {
         size_t len = strlen (result->pw_name);
         char buf[len];
         enum nss_status status;

         memcpy (buf, &result->pw_name[1], len);

         status = getpwuid_plususer (uid, result, buffer, buflen, errnop);

         if (status == NSS_STATUS_RETURN)
           continue;

         if (status == NSS_STATUS_SUCCESS)
           {
             if (strcmp (buf, result->pw_name) == 0)
              return NSS_STATUS_SUCCESS;
           }
         else if (status == NSS_STATUS_RETURN)   /* We couldn't parse the entry */
           return NSS_STATUS_NOTFOUND;
         else
           return status;

         continue;
       }

      /* +:... */
      if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
       {
         enum nss_status status;

         status = getpwuid_plususer (uid, result, buffer, buflen, errnop);
         if (status == NSS_STATUS_SUCCESS)       /* We found the entry. */
           break;
         else if (status == NSS_STATUS_RETURN)   /* We couldn't parse the entry */
           return NSS_STATUS_NOTFOUND;
         else
           return status;
       }
    }
  return NSS_STATUS_SUCCESS;
}

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static enum nss_status internal_setpwent ( ent_t ent,
int  stayopen,
int  needent 
) [static]

Definition at line 216 of file compat-pwd.c.

{
  enum nss_status status = NSS_STATUS_SUCCESS;

  ent->first = ent->netgroup = false;
  ent->files = true;
  ent->setent_status = NSS_STATUS_SUCCESS;

  /* If something was left over free it.  */
  if (ent->netgroup)
    __internal_endnetgrent (&ent->netgrdata);

  if (ent->blacklist.data != NULL)
    {
      ent->blacklist.current = 1;
      ent->blacklist.data[0] = '|';
      ent->blacklist.data[1] = '\0';
    }
  else
    ent->blacklist.current = 0;

  if (ent->stream == NULL)
    {
      ent->stream = fopen ("/etc/passwd", "rme");

      if (ent->stream == NULL)
       status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
      else
       {
         /* We have to make sure the file is  `closed on exec'.  */
         int result = 0;

         if (__compat_have_cloexec <= 0)
           {
             int flags;
             result = flags = fcntl (fileno_unlocked (ent->stream), F_GETFD,
                                  0);
             if (result >= 0)
              {
#if defined O_CLOEXEC && !defined __ASSUME_O_CLOEXEC
                if (__compat_have_cloexec == 0)
                  __compat_have_cloexec = (flags & FD_CLOEXEC) ? 1 : -1;

                if (__compat_have_cloexec < 0)
#endif
                  {
                    flags |= FD_CLOEXEC;
                    result = fcntl (fileno_unlocked (ent->stream), F_SETFD,
                                  flags);
                  }
              }
           }

         if (result < 0)
           {
             /* Something went wrong.  Close the stream and return a
                failure.  */
             fclose (ent->stream);
             ent->stream = NULL;
             status = NSS_STATUS_UNAVAIL;
           }
         else
           /* We take care of locking ourself.  */
           __fsetlocking (ent->stream, FSETLOCKING_BYCALLER);
       }
    }
  else
    rewind (ent->stream);

  give_pwd_free (&ent->pwd);

  if (needent && status == NSS_STATUS_SUCCESS && nss_setpwent)
    ent->setent_status = nss_setpwent (stayopen);

  return status;
}

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static size_t pwd_need_buflen ( struct passwd pwd) [static]

Definition at line 129 of file compat-pwd.c.

{
  size_t len = 0;

  if (pwd->pw_passwd != NULL)
    len += strlen (pwd->pw_passwd) + 1;

  if (pwd->pw_gecos != NULL)
    len += strlen (pwd->pw_gecos) + 1;

  if (pwd->pw_dir != NULL)
    len += strlen (pwd->pw_dir) + 1;

  if (pwd->pw_shell != NULL)
    len += strlen (pwd->pw_shell) + 1;

  return len;
}

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Variable Documentation

ent_t ext_ent [static]
Initial value:
 { false, false, true, NSS_STATUS_SUCCESS, NULL,
                      { NULL, 0, 0 },
                      { NULL, NULL, 0, 0, NULL, NULL, NULL }}

Definition at line 77 of file compat-pwd.c.

service_user* ni [static]

Definition at line 36 of file compat-pwd.c.

enum nss_status(* nss_endpwent)(void) [static]

Definition at line 46 of file compat-pwd.c.

enum nss_status(* nss_getpwent_r)(struct passwd *pwd, char *buffer, size_t buflen, int *errnop) [static]

Definition at line 44 of file compat-pwd.c.

enum nss_status(* nss_getpwnam_r)(const char *name, struct passwd *pwd, char *buffer, size_t buflen, int *errnop) [static]

Definition at line 38 of file compat-pwd.c.

enum nss_status(* nss_getpwuid_r)(uid_t uid, struct passwd *pwd, char *buffer, size_t buflen, int *errnop) [static]

Definition at line 41 of file compat-pwd.c.

enum nss_status(* nss_setpwent)(int stayopen) [static]

Definition at line 37 of file compat-pwd.c.