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glibc/nis/nss_compat/compat-spwd.c

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/* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <nss.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <netdb.h>
#include <shadow.h>
#include <string.h>
#include <bits/libc-lock.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>
#include <rpcsvc/nis.h>
#include <nsswitch.h>
#include "netgroup.h"
#include "nss-nisplus.h"
#include "nisplus-parser.h"
static service_user *ni = NULL;
static bool_t use_nisplus = FALSE; /* default: passwd_compat: nis */
static nis_name pwdtable = NULL; /* Name of the password table */
static size_t pwdtablelen = 0;
/* Get the declaration of the parser function. */
#define ENTNAME spent
#define STRUCTURE spwd
#define EXTERN_PARSER
#include <nss/nss_files/files-parse.c>
/* Structure for remembering -@netgroup and -user members ... */
#define BLACKLIST_INITIAL_SIZE 512
#define BLACKLIST_INCREMENT 256
struct blacklist_t
{
char *data;
int current;
int size;
};
struct ent_t
{
bool_t netgroup;
bool_t nis;
bool_t first;
char *oldkey;
int oldkeylen;
nis_result *result;
FILE *stream;
struct blacklist_t blacklist;
struct spwd pwd;
struct __netgrent netgrdata;
};
typedef struct ent_t ent_t;
static ent_t ext_ent = {0, 0, 0, NULL, 0, NULL, NULL, {NULL, 0, 0},
{NULL, NULL, 0, 0, 0, 0, 0, 0, 0}};
/* Protect global state against multiple changers. */
__libc_lock_define_initialized (static, lock)
/* Prototypes for local functions. */
static void blacklist_store_name (const char *, ent_t *);
static int in_blacklist (const char *, int, ent_t *);
static void
give_spwd_free (struct spwd *pwd)
{
if (pwd->sp_namp != NULL)
free (pwd->sp_namp);
if (pwd->sp_pwdp != NULL)
free (pwd->sp_pwdp);
memset (pwd, '\0', sizeof (struct spwd));
}
static int
spwd_need_buflen (struct spwd *pwd)
{
int len = 0;
if (pwd->sp_pwdp != NULL)
len += strlen (pwd->sp_pwdp) + 1;
return len;
}
static void
copy_spwd_changes (struct spwd *dest, struct spwd *src,
char *buffer, size_t buflen)
{
if (src->sp_pwdp != NULL && strlen (src->sp_pwdp))
{
if (buffer == NULL)
dest->sp_pwdp = strdup (src->sp_pwdp);
else if (dest->sp_pwdp &&
strlen (dest->sp_pwdp) >= strlen (src->sp_pwdp))
strcpy (dest->sp_pwdp, src->sp_pwdp);
else
{
dest->sp_pwdp = buffer;
strcpy (dest->sp_pwdp, src->sp_pwdp);
buffer += strlen (dest->sp_pwdp) + 1;
buflen = buflen - (strlen (dest->sp_pwdp) + 1);
}
}
if (src->sp_lstchg != 0)
dest->sp_lstchg = src->sp_lstchg;
if (src->sp_min != 0)
dest->sp_min = src->sp_min;
if (src->sp_max != 0)
dest->sp_max = src->sp_max;
if (src->sp_warn != 0)
dest->sp_warn = src->sp_warn;
if (src->sp_inact != 0)
dest->sp_inact = src->sp_inact;
if (src->sp_expire != 0)
dest->sp_expire = src->sp_expire;
if (src->sp_flag != 0)
dest->sp_flag = src->sp_flag;
}
static enum nss_status
internal_setspent (ent_t *ent)
{
enum nss_status status = NSS_STATUS_SUCCESS;
ent->nis = ent->first = ent->netgroup = 0;
/* If something was left over free it. */
if (ent->netgroup)
__internal_endnetgrent (&ent->netgrdata);
if (ent->oldkey != NULL)
{
free (ent->oldkey);
ent->oldkey = NULL;
ent->oldkeylen = 0;
}
if (ent->result != NULL)
{
nis_freeresult (ent->result);
ent->result = NULL;
}
if (pwdtable == NULL)
{
static const char key[] = "passwd.org_dir.";
const char *local_dir = nis_local_directory ();
size_t len_local_dir = strlen (local_dir);
pwdtable = malloc (sizeof (key) + len_local_dir);
if (pwdtable == NULL)
return NSS_STATUS_TRYAGAIN;
pwdtablelen = ((char *) mempcpy (mempcpy (pwdtable,
key, sizeof (key) - 1),
local_dir, len_local_dir + 1)
- pwdtable) - 1;
}
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/shadow", "r");
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, flags;
result = flags = fcntl (fileno (ent->stream), F_GETFD, 0);
if (result >= 0)
{
flags |= FD_CLOEXEC;
result = fcntl (fileno (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
rewind (ent->stream);
give_spwd_free (&ent->pwd);
return status;
}
enum nss_status
_nss_compat_setspent (void)
{
enum nss_status result;
__libc_lock_lock (lock);
if (ni == NULL)
{
__nss_database_lookup ("shadow_compat", "passwd_compat", "nis", &ni);
use_nisplus = (strcmp (ni->name, "nisplus") == 0);
}
result = internal_setspent (&ext_ent);
__libc_lock_unlock (lock);
return result;
}
static enum nss_status
internal_endspent (ent_t *ent)
{
if (ent->stream != NULL)
{
fclose (ent->stream);
ent->stream = NULL;
}
if (ent->netgroup)
__internal_endnetgrent (&ent->netgrdata);
ent->nis = ent->first = ent->netgroup = 0;
if (ent->oldkey != NULL)
{
free (ent->oldkey);
ent->oldkey = NULL;
ent->oldkeylen = 0;
}
if (ent->result != NULL)
{
nis_freeresult (ent->result);
ent->result = NULL;
}
if (ent->blacklist.data != NULL)
{
ent->blacklist.current = 1;
ent->blacklist.data[0] = '|';
ent->blacklist.data[1] = '\0';
}
else
ent->blacklist.current = 0;
give_spwd_free (&ent->pwd);
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_compat_endspent (void)
{
enum nss_status result;
__libc_lock_lock (lock);
result = internal_endspent (&ext_ent);
__libc_lock_unlock (lock);
return result;
}
static enum nss_status
getspent_next_nis_netgr (const char *name, struct spwd *result, ent_t *ent,
char *group, char *buffer, size_t buflen, int *errnop)
{
struct parser_data *data = (void *) buffer;
char *ypdomain, *host, *user, *domain, *outval, *p, *p2;
int status, outvallen;
size_t p2len;
if (yp_get_default_domain (&ypdomain) != YPERR_SUCCESS)
{
ent->netgroup = 0;
ent->first = 0;
give_spwd_free (&ent->pwd);
return NSS_STATUS_UNAVAIL;
}
if (ent->first == TRUE)
{
bzero (&ent->netgrdata, sizeof (struct __netgrent));
__internal_setnetgrent (group, &ent->netgrdata);
ent->first = FALSE;
}
while (1)
{
char *saved_cursor;
int parse_res;
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_spwd_free (&ent->pwd);
return NSS_STATUS_RETURN;
}
if (user == NULL || user[0] == '-')
continue;
if (domain != NULL && strcmp (ypdomain, domain) != 0)
continue;
/* If name != NULL, we are called from getpwnam */
if (name != NULL)
if (strcmp (user, name) != 0)
continue;
if (yp_match (ypdomain, "shadow.byname", user,
strlen (user), &outval, &outvallen)
!= YPERR_SUCCESS)
continue;
p2len = spwd_need_buflen (&ent->pwd);
if (p2len > buflen)
{
free (outval);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
p2 = buffer + (buflen - p2len);
buflen -= p2len;
if (buflen < ((size_t) outval + 1))
{
free (outval);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
p = strncpy (buffer, outval, buflen);
while (isspace (*p))
p++;
free (outval);
parse_res = _nss_files_parse_spent (p, result, data, buflen, errnop);
if (parse_res == -1)
{
ent->netgrdata.cursor = saved_cursor;
return NSS_STATUS_TRYAGAIN;
}
if (parse_res)
{
/* Store the User in the blacklist for the "+" at the end of
/etc/passwd */
blacklist_store_name (result->sp_namp, ent);
copy_spwd_changes (result, &ent->pwd, p2, p2len);
break;
}
}
return NSS_STATUS_SUCCESS;
}
static enum nss_status
getspent_next_nisplus_netgr (const char *name, struct spwd *result,
ent_t *ent, char *group, char *buffer,
size_t buflen, int *errnop)
{
char *ypdomain, *host, *user, *domain, *p2;
int status, parse_res;
size_t p2len;
nis_result *nisres;
/* Maybe we should use domainname here ? We need the current
domainname for the domain field in netgroups */
if (yp_get_default_domain (&ypdomain) != YPERR_SUCCESS)
{
ent->netgroup = 0;
ent->first = 0;
give_spwd_free (&ent->pwd);
return NSS_STATUS_UNAVAIL;
}
if (ent->first == TRUE)
{
bzero (&ent->netgrdata, 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_spwd_free (&ent->pwd);
return NSS_STATUS_RETURN;
}
if (user == NULL || user[0] == '-')
continue;
if (domain != NULL && strcmp (ypdomain, domain) != 0)
continue;
/* If name != NULL, we are called from getpwnam */
if (name != NULL)
if (strcmp (user, name) != 0)
continue;
p2len = spwd_need_buflen (&ent->pwd);
if (p2len > buflen)
{
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
p2 = buffer + (buflen - p2len);
buflen -= p2len;
{
char buf[strlen (user) + 30 + pwdtablelen];
sprintf (buf, "[name=%s],%s", user, pwdtable);
nisres = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
}
if (niserr2nss (nisres->status) != NSS_STATUS_SUCCESS)
{
nis_freeresult (nisres);
continue;
}
parse_res = _nss_nisplus_parse_spent (nisres, result, buffer,
buflen, errnop);
if (parse_res == -1)
{
nis_freeresult (nisres);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
nis_freeresult (nisres);
if (parse_res)
{
/* Store the User in the blacklist for the "+" at the end of
/etc/passwd */
blacklist_store_name (result->sp_namp, ent);
copy_spwd_changes (result, &ent->pwd, p2, p2len);
break;
}
}
return NSS_STATUS_SUCCESS;
}
static enum nss_status
getspent_next_nisplus (struct spwd *result, ent_t *ent, char *buffer,
size_t buflen, int *errnop)
{
int parse_res;
size_t p2len;
char *p2;
p2len = spwd_need_buflen (&ent->pwd);
if (p2len > buflen)
{
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
p2 = buffer + (buflen - p2len);
buflen -= p2len;
do
{
bool_t saved_first;
nis_result *saved_res;
if (ent->first)
{
saved_first = TRUE;
saved_res = ent->result;
ent->result = nis_first_entry (pwdtable);
if (niserr2nss (ent->result->status) != NSS_STATUS_SUCCESS)
{
ent->nis = 0;
give_spwd_free (&ent->pwd);
return niserr2nss (ent->result->status);
}
ent->first = FALSE;
}
else
{
nis_result *res;
saved_first = FALSE;
saved_res = ent->result;
res = nis_next_entry (pwdtable, &ent->result->cookie);
ent->result = res;
if (niserr2nss (ent->result->status) != NSS_STATUS_SUCCESS)
{
nis_freeresult (saved_res);
ent->nis = 0;
give_spwd_free (&ent->pwd);
return niserr2nss (ent->result->status);
}
}
parse_res = _nss_nisplus_parse_spent (ent->result, result, buffer,
buflen, errnop);
if (parse_res == -1)
{
ent->first = saved_first;
nis_freeresult (ent->result);
ent->result = saved_res;
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
else
{
if (!saved_first)
nis_freeresult (saved_res);
}
if (parse_res &&
in_blacklist (result->sp_namp, strlen (result->sp_namp), ent))
parse_res = 0; /* if result->pw_name in blacklist,search next entry */
}
while (!parse_res);
copy_spwd_changes (result, &ent->pwd, p2, p2len);
return NSS_STATUS_SUCCESS;
}
static enum nss_status
getspent_next_nis (struct spwd *result, ent_t *ent,
char *buffer, size_t buflen, int *errnop)
{
struct parser_data *data = (void *) buffer;
char *domain, *outkey, *outval, *p, *p2;
int outkeylen, outvallen, parse_res;
size_t p2len;
if (yp_get_default_domain (&domain) != YPERR_SUCCESS)
{
ent->nis = 0;
give_spwd_free (&ent->pwd);
return NSS_STATUS_UNAVAIL;
}
p2len = spwd_need_buflen (&ent->pwd);
if (p2len > buflen)
{
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
p2 = buffer + (buflen - p2len);
buflen -= p2len;
do
{
bool_t saved_first;
char *saved_oldkey;
int saved_oldlen;
if (ent->first)
{
if (yp_first (domain, "shadow.byname", &outkey, &outkeylen,
&outval, &outvallen) != YPERR_SUCCESS)
{
ent->nis = 0;
give_spwd_free (&ent->pwd);
return NSS_STATUS_UNAVAIL;
}
if (buflen < ((size_t) outvallen + 1))
{
free (outval);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
saved_first = TRUE;
saved_oldkey = ent->oldkey;
saved_oldlen = ent->oldkeylen;
ent->oldkey = outkey;
ent->oldkeylen = outkeylen;
ent->first = FALSE;
}
else
{
if (yp_next (domain, "shadow.byname", ent->oldkey, ent->oldkeylen,
&outkey, &outkeylen, &outval, &outvallen)
!= YPERR_SUCCESS)
{
ent->nis = 0;
give_spwd_free (&ent->pwd);
*errnop = ENOENT;
return NSS_STATUS_NOTFOUND;
}
if (buflen < ((size_t) outvallen + 1))
{
free (outval);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
saved_first = FALSE;
saved_oldkey = ent->oldkey;
saved_oldlen = ent->oldkeylen;
ent->oldkey = outkey;
ent->oldkeylen = outkeylen;
}
/* Copy the found data to our buffer */
p = strncpy (buffer, outval, buflen);
/* ...and free the data. */
free (outval);
while (isspace (*p))
++p;
parse_res = _nss_files_parse_spent (p, result, data, buflen, errnop);
if (parse_res == -1)
{
free (ent->oldkey);
ent->oldkey = saved_oldkey;
ent->oldkeylen = saved_oldlen;
ent->first = saved_first;
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
else
{
if (!saved_first)
free (saved_oldkey);
}
if (parse_res &&
in_blacklist (result->sp_namp, strlen (result->sp_namp), ent))
parse_res = 0;
}
while (!parse_res);
copy_spwd_changes (result, &ent->pwd, p2, p2len);
return NSS_STATUS_SUCCESS;
}
/* This function handle the +user entrys in /etc/shadow */
static enum nss_status
getspnam_plususer (const char *name, struct spwd *result, char *buffer,
size_t buflen, int *errnop)
{
struct parser_data *data = (void *) buffer;
struct spwd pwd;
int parse_res;
char *p;
size_t plen;
memset (&pwd, '\0', sizeof (struct spwd));
copy_spwd_changes (&pwd, result, NULL, 0);
plen = spwd_need_buflen (&pwd);
if (plen > buflen)
{
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
p = buffer + (buflen - plen);
buflen -= plen;
if (use_nisplus) /* Do the NIS+ query here */
{
nis_result *res;
char buf[strlen (name) + 24 + pwdtablelen];
sprintf(buf, "[name=%s],%s", name, pwdtable);
res = nis_list(buf, 0, NULL, NULL);
if (niserr2nss (res->status) != NSS_STATUS_SUCCESS)
{
enum nss_status status = niserr2nss (res->status);
nis_freeresult (res);
return status;
}
parse_res = _nss_nisplus_parse_spent (res, result, buffer,
buflen, errnop);
if (parse_res == -1)
{
nis_freeresult (res);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
nis_freeresult (res);
}
else /* Use NIS */
{
char *domain, *outval, *ptr;
int outvallen;
if (yp_get_default_domain (&domain) != YPERR_SUCCESS)
{
*errnop = ENOENT;
return NSS_STATUS_NOTFOUND;
}
if (yp_match (domain, "shadow.byname", name, strlen (name),
&outval, &outvallen) != YPERR_SUCCESS)
{
*errnop = ENOENT;
return NSS_STATUS_NOTFOUND;
}
if (buflen < ((size_t) outvallen + 1))
{
free (outval);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
ptr = strncpy (buffer, outval, buflen);
free (outval);
while (isspace (*ptr))
ptr++;
parse_res = _nss_files_parse_spent (ptr, result, data, buflen, errnop);
if (parse_res == -1)
return NSS_STATUS_TRYAGAIN;
}
if (parse_res)
{
copy_spwd_changes (result, &pwd, p, plen);
give_spwd_free (&pwd);
/* We found the entry. */
return NSS_STATUS_SUCCESS;
}
else
{
/* Give buffer the old len back */
buflen += plen;
give_spwd_free (&pwd);
}
return NSS_STATUS_RETURN;
}
static enum nss_status
getspent_next_file (struct spwd *result, ent_t *ent,
char *buffer, size_t buflen, int *errnop)
{
struct parser_data *data = (void *) buffer;
while (1)
{
fpos_t pos;
int parse_res = 0;
char *p;
do
{
fgetpos (ent->stream, &pos);
buffer[buflen - 1] = '\xff';
p = fgets (buffer, buflen, ent->stream);
if (p == NULL && feof (ent->stream))
{
*errnop = ENOENT;
return NSS_STATUS_NOTFOUND;
}
if (p == NULL || buffer[buflen - 1] != '\xff')
{
fsetpos (ent->stream, &pos);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
/* 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_spent (p, result, data,
buflen, errnop)));
if (parse_res == -1)
{
/* The parser ran out of space. */
fsetpos (ent->stream, &pos);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
if (result->sp_namp[0] != '+' && result->sp_namp[0] != '-')
/* This is a real entry. */
break;
/* -@netgroup */
if (result->sp_namp[0] == '-' && result->sp_namp[1] == '@'
&& result->sp_namp[2] != '\0')
{
/* XXX Do not use fixed length buffers. */
char buf2[1024];
char *user, *host, *domain;
struct __netgrent netgrdata;
bzero (&netgrdata, sizeof (struct __netgrent));
__internal_setnetgrent (&result->sp_namp[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->sp_namp[0] == '+' && result->sp_namp[1] == '@'
&& result->sp_namp[2] != '\0')
{
int status;
ent->netgroup = TRUE;
ent->first = TRUE;
copy_spwd_changes (&ent->pwd, result, NULL, 0);
if (use_nisplus)
status = getspent_next_nisplus_netgr (NULL, result, ent,
&result->sp_namp[2],
buffer, buflen, errnop);
else
status = getspent_next_nis_netgr (NULL, result, ent,
&result->sp_namp[2],
buffer, buflen, errnop);
if (status == NSS_STATUS_RETURN)
continue;
else
return status;
}
/* -user */
if (result->sp_namp[0] == '-' && result->sp_namp[1] != '\0'
&& result->sp_namp[1] != '@')
{
blacklist_store_name (&result->sp_namp[1], ent);
continue;
}
/* +user */
if (result->sp_namp[0] == '+' && result->sp_namp[1] != '\0'
&& result->sp_namp[1] != '@')
{
enum nss_status status;
/* Store the User in the blacklist for the "+" at the end of
/etc/passwd */
blacklist_store_name (&result->sp_namp[1], ent);
status = getspnam_plususer (&result->sp_namp[1], 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 */
|| status == NSS_STATUS_NOTFOUND) /* entry doesn't exist */
continue;
else
{
if (status == NSS_STATUS_TRYAGAIN)
{
fsetpos (ent->stream, &pos);
*errnop = ERANGE;
}
return status;
}
}
/* +:... */
if (result->sp_namp[0] == '+' && result->sp_namp[1] == '\0')
{
ent->nis = TRUE;
ent->first = TRUE;
copy_spwd_changes (&ent->pwd, result, NULL, 0);
if (use_nisplus)
return getspent_next_nisplus (result, ent, buffer, buflen, errnop);
else
return getspent_next_nis (result, ent, buffer, buflen, errnop);
}
}
return NSS_STATUS_SUCCESS;
}
static enum nss_status
internal_getspent_r (struct spwd *pw, ent_t *ent,
char *buffer, size_t buflen, int *errnop)
{
if (ent->netgroup)
{
int status;
/* We are searching members in a netgroup */
/* Since this is not the first call, we don't need the group name */
if (use_nisplus)
status = getspent_next_nisplus_netgr (NULL, pw, ent, NULL, buffer,
buflen, errnop);
else
status = getspent_next_nis_netgr (NULL, pw, ent, NULL, buffer, buflen,
errnop);
if (status == NSS_STATUS_RETURN)
return getspent_next_file (pw, ent, buffer, buflen, errnop);
else
return status;
}
else
if (ent->nis)
{
if (use_nisplus)
return getspent_next_nisplus (pw, ent, buffer, buflen, errnop);
else
return getspent_next_nis (pw, ent, buffer, buflen, errnop);
}
else
return getspent_next_file (pw, ent, buffer, buflen, errnop);
}
enum nss_status
_nss_compat_getspent_r (struct spwd *pwd, char *buffer, size_t buflen,
int *errnop)
{
enum nss_status status = NSS_STATUS_SUCCESS;
__libc_lock_lock (lock);
if (ni == NULL)
{
__nss_database_lookup ("shadow_compat", "passwd_compat", "nis", &ni);
use_nisplus = (strcmp (ni->name, "nisplus") == 0);
}
/* Be prepared that the setspent function was not called before. */
if (ext_ent.stream == NULL)
status = internal_setspent (&ext_ent);
if (status == NSS_STATUS_SUCCESS)
status = internal_getspent_r (pwd, &ext_ent, buffer, buflen, errnop);
__libc_lock_unlock (lock);
return status;
}
/* Searches in /etc/passwd and the NIS/NIS+ map for a special user */
static enum nss_status
internal_getspnam_r (const char *name, struct spwd *result, ent_t *ent,
char *buffer, size_t buflen, int *errnop)
{
struct parser_data *data = (void *) buffer;
while (1)
{
fpos_t pos;
char *p;
int parse_res;
do
{
fgetpos (ent->stream, &pos);
buffer[buflen - 1] = '\xff';
p = fgets (buffer, buflen, ent->stream);
if (p == NULL && feof (ent->stream))
{
*errnop = ENOENT;
return NSS_STATUS_NOTFOUND;
}
if (p == NULL || buffer[buflen - 1] != '\xff')
{
fsetpos (ent->stream, &pos);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
/* 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_spent (p, result, data, buflen,
errnop)));
if (parse_res == -1)
{
/* The parser ran out of space. */
fsetpos (ent->stream, &pos);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
/* This is a real entry. */
if (result->sp_namp[0] != '+' && result->sp_namp[0] != '-')
{
if (strcmp (result->sp_namp, name) == 0)
return NSS_STATUS_SUCCESS;
else
continue;
}
/* -@netgroup */
if (result->sp_namp[0] == '-' && result->sp_namp[1] == '@'
&& result->sp_namp[2] != '\0')
{
/* XXX Do not use fixed length buffers. */
char buf2[1024];
char *user, *host, *domain;
struct __netgrent netgrdata;
bzero (&netgrdata, sizeof (struct __netgrent));
__internal_setnetgrent (&result->sp_namp[2], &netgrdata);
while (__internal_getnetgrent_r (&host, &user, &domain, &netgrdata,
buf2, sizeof (buf2), errnop))
{
if (user != NULL && user[0] != '-')
if (strcmp (user, name) == 0)
{
*errnop = ENOENT;
return NSS_STATUS_NOTFOUND;
}
}
__internal_endnetgrent (&netgrdata);
continue;
}
/* +@netgroup */
if (result->sp_namp[0] == '+' && result->sp_namp[1] == '@'
&& result->sp_namp[2] != '\0')
{
char *buf = strdupa (&result->sp_namp[2]);
int status;
ent->netgroup = TRUE;
ent->first = TRUE;
copy_spwd_changes (&ent->pwd, result, NULL, 0);
do
{
if (use_nisplus)
status = getspent_next_nisplus_netgr (name, result, ent, buf,
buffer, buflen, errnop);
else
status = getspent_next_nis_netgr (name, result, ent, buf,
buffer, buflen, errnop);
if (status == NSS_STATUS_RETURN)
continue;
if (status == NSS_STATUS_SUCCESS
&& strcmp (result->sp_namp, name) == 0)
return NSS_STATUS_SUCCESS;
} while (status == NSS_STATUS_SUCCESS);
continue;
}
/* -user */
if (result->sp_namp[0] == '-' && result->sp_namp[1] != '\0'
&& result->sp_namp[1] != '@')
{
if (strcmp (&result->sp_namp[1], name) == 0)
return NSS_STATUS_NOTFOUND;
else
continue;
}
/* +user */
if (result->sp_namp[0] == '+' && result->sp_namp[1] != '\0'
&& result->sp_namp[1] != '@')
{
if (strcmp (name, &result->sp_namp[1]) == 0)
{
enum nss_status status;
status = getspnam_plususer (name, result, buffer, buflen,
errnop);
if (status == NSS_STATUS_RETURN)
/* We couldn't parse the entry */
return NSS_STATUS_NOTFOUND;
else
return status;
}
}
/* +:... */
if (result->sp_namp[0] == '+' && result->sp_namp[1] == '\0')
{
enum nss_status status;
status = getspnam_plususer (name, result, buffer, buflen, errnop);
if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
return NSS_STATUS_NOTFOUND;
else
return status;
}
}
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_compat_getspnam_r (const char *name, struct spwd *pwd,
char *buffer, size_t buflen, int *errnop)
{
ent_t ent = {0, 0, 0, NULL, 0, NULL, NULL, {NULL, 0, 0},
{NULL, NULL, 0, 0, 0, 0, 0, 0, 0}};
enum nss_status status;
if (name[0] == '-' || name[0] == '+')
return NSS_STATUS_NOTFOUND;
if (ni == NULL)
{
__nss_database_lookup ("shadow_compat", "passwd_compat", "nis", &ni);
use_nisplus = (strcmp (ni->name, "nisplus") == 0);
}
status = internal_setspent (&ent);
if (status != NSS_STATUS_SUCCESS)
return status;
status = internal_getspnam_r (name, pwd, &ent, buffer, buflen, errnop);
internal_endspent (&ent);
return status;
}
/* Support routines for remembering -@netgroup and -user entries.
The names are stored in a single string with `|' as separator. */
static void
blacklist_store_name (const char *name, ent_t *ent)
{
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;
}
/* Returns TRUE if ent->blacklist contains name, else FALSE. */
static bool_t
in_blacklist (const char *name, int namelen, ent_t *ent)
{
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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