1481 lines
35 KiB
C
1481 lines
35 KiB
C
/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <nss.h>
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#include <pwd.h>
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#include <errno.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <netdb.h>
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#include <string.h>
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#include <bits/libc-lock.h>
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#include <rpcsvc/yp.h>
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#include <rpcsvc/ypclnt.h>
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#include <rpcsvc/nis.h>
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#include <nsswitch.h>
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#include "netgroup.h"
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#include "nss-nisplus.h"
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#include "nisplus-parser.h"
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static service_user *ni = NULL;
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static bool_t use_nisplus = FALSE; /* default: passwd_compat: nis */
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static nis_name pwdtable = NULL; /* Name of the pwd table */
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static size_t pwdtablelen = 0;
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/* Get the declaration of the parser function. */
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#define ENTNAME pwent
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#define STRUCTURE passwd
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#define EXTERN_PARSER
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#include <nss/nss_files/files-parse.c>
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/* Structure for remembering -@netgroup and -user members ... */
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#define BLACKLIST_INITIAL_SIZE 512
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#define BLACKLIST_INCREMENT 256
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struct blacklist_t
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{
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char *data;
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int current;
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int size;
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};
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struct ent_t
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{
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bool_t netgroup;
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bool_t nis;
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bool_t first;
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char *oldkey;
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int oldkeylen;
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nis_result *result;
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FILE *stream;
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struct blacklist_t blacklist;
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struct passwd pwd;
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struct __netgrent netgrdata;
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};
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typedef struct ent_t ent_t;
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static ent_t ext_ent = {0, 0, 0, NULL, 0, NULL, NULL, {NULL, 0, 0},
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{NULL, NULL, 0, 0, NULL, NULL, NULL}};
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/* Protect global state against multiple changers. */
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__libc_lock_define_initialized (static, lock)
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/* Prototypes for local functions. */
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static void blacklist_store_name (const char *, ent_t *);
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static int in_blacklist (const char *, int, ent_t *);
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static void
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give_pwd_free (struct passwd *pwd)
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{
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if (pwd->pw_name != NULL)
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free (pwd->pw_name);
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if (pwd->pw_passwd != NULL)
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free (pwd->pw_passwd);
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if (pwd->pw_gecos != NULL)
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free (pwd->pw_gecos);
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if (pwd->pw_dir != NULL)
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free (pwd->pw_dir);
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if (pwd->pw_shell != NULL)
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free (pwd->pw_shell);
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memset (pwd, '\0', sizeof (struct passwd));
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}
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static size_t
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pwd_need_buflen (struct passwd *pwd)
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{
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size_t len = 0;
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if (pwd->pw_passwd != NULL)
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len += strlen (pwd->pw_passwd) + 1;
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if (pwd->pw_gecos != NULL)
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len += strlen (pwd->pw_gecos) + 1;
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if (pwd->pw_dir != NULL)
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len += strlen (pwd->pw_dir) + 1;
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if (pwd->pw_shell != NULL)
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len += strlen (pwd->pw_shell) + 1;
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return len;
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}
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static void
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copy_pwd_changes (struct passwd *dest, struct passwd *src,
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char *buffer, size_t buflen)
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{
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if (src->pw_passwd != NULL && strlen (src->pw_passwd))
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{
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if (buffer == NULL)
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dest->pw_passwd = strdup (src->pw_passwd);
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else if (dest->pw_passwd &&
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strlen (dest->pw_passwd) >= strlen (src->pw_passwd))
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strcpy (dest->pw_passwd, src->pw_passwd);
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else
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{
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dest->pw_passwd = buffer;
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strcpy (dest->pw_passwd, src->pw_passwd);
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buffer += strlen (dest->pw_passwd) + 1;
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buflen = buflen - (strlen (dest->pw_passwd) + 1);
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}
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}
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if (src->pw_gecos != NULL && strlen (src->pw_gecos))
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{
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if (buffer == NULL)
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dest->pw_gecos = strdup (src->pw_gecos);
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else if (dest->pw_gecos &&
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strlen (dest->pw_gecos) >= strlen (src->pw_gecos))
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strcpy (dest->pw_gecos, src->pw_gecos);
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else
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{
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dest->pw_gecos = buffer;
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strcpy (dest->pw_gecos, src->pw_gecos);
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buffer += strlen (dest->pw_gecos) + 1;
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buflen = buflen - (strlen (dest->pw_gecos) + 1);
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}
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}
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if (src->pw_dir != NULL && strlen (src->pw_dir))
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{
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if (buffer == NULL)
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dest->pw_dir = strdup (src->pw_dir);
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else if (dest->pw_dir &&
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strlen (dest->pw_dir) >= strlen (src->pw_dir))
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strcpy (dest->pw_dir, src->pw_dir);
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else
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{
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dest->pw_dir = buffer;
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strcpy (dest->pw_dir, src->pw_dir);
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buffer += strlen (dest->pw_dir) + 1;
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buflen = buflen - (strlen (dest->pw_dir) + 1);
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}
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}
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if (src->pw_shell != NULL && strlen (src->pw_shell))
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{
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if (buffer == NULL)
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dest->pw_shell = strdup (src->pw_shell);
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else if (dest->pw_shell &&
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strlen (dest->pw_shell) >= strlen (src->pw_shell))
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strcpy (dest->pw_shell, src->pw_shell);
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else
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{
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dest->pw_shell = buffer;
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strcpy (dest->pw_shell, src->pw_shell);
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buffer += strlen (dest->pw_shell) + 1;
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buflen = buflen - (strlen (dest->pw_shell) + 1);
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}
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}
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}
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static enum nss_status
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internal_setpwent (ent_t *ent)
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{
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enum nss_status status = NSS_STATUS_SUCCESS;
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ent->nis = ent->first = ent->netgroup = 0;
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/* If something was left over free it. */
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if (ent->netgroup)
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__internal_endnetgrent (&ent->netgrdata);
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if (ent->oldkey != NULL)
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{
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free (ent->oldkey);
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ent->oldkey = NULL;
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ent->oldkeylen = 0;
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}
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if (ent->result != NULL)
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{
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nis_freeresult (ent->result);
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ent->result = NULL;
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}
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if (pwdtable == NULL)
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{
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static const char key[] = "passwd.org_dir.";
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const char *local_dir = nis_local_directory ();
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size_t len_local_dir = strlen (local_dir);
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pwdtable = malloc (sizeof (key) + len_local_dir);
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if (pwdtable == NULL)
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return NSS_STATUS_TRYAGAIN;
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pwdtablelen = ((char *) mempcpy (mempcpy (pwdtable,
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key, sizeof (key) - 1),
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local_dir, len_local_dir + 1)
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- pwdtable) - 1;
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}
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ent->blacklist.current = 0;
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if (ent->blacklist.data != NULL)
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ent->blacklist.data[0] = '\0';
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if (ent->stream == NULL)
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{
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ent->stream = fopen ("/etc/passwd", "r");
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if (ent->stream == NULL)
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status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
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else
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{
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/* We have to make sure the file is `closed on exec'. */
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int result, flags;
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result = flags = fcntl (fileno (ent->stream), F_GETFD, 0);
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if (result >= 0)
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{
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flags |= FD_CLOEXEC;
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result = fcntl (fileno (ent->stream), F_SETFD, flags);
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}
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if (result < 0)
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{
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/* Something went wrong. Close the stream and return a
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failure. */
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fclose (ent->stream);
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ent->stream = NULL;
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status = NSS_STATUS_UNAVAIL;
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}
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}
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}
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else
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rewind (ent->stream);
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give_pwd_free (&ent->pwd);
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return status;
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}
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enum nss_status
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_nss_compat_setpwent (void)
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{
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enum nss_status result;
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__libc_lock_lock (lock);
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if (ni == NULL)
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{
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__nss_database_lookup ("passwd_compat", NULL, "nis", &ni);
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use_nisplus = (strcmp (ni->name, "nisplus") == 0);
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}
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result = internal_setpwent (&ext_ent);
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__libc_lock_unlock (lock);
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return result;
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}
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static enum nss_status
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internal_endpwent (ent_t *ent)
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{
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if (ent->stream != NULL)
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{
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fclose (ent->stream);
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ent->stream = NULL;
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}
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if (ent->netgroup)
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__internal_endnetgrent (&ent->netgrdata);
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ent->nis = ent->first = ent->netgroup = 0;
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if (ent->oldkey != NULL)
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{
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free (ent->oldkey);
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ent->oldkey = NULL;
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ent->oldkeylen = 0;
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}
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if (ent->result != NULL)
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{
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nis_freeresult (ent->result);
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ent->result = NULL;
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}
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ent->blacklist.current = 0;
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if (ent->blacklist.data != NULL)
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ent->blacklist.data[0] = '\0';
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give_pwd_free (&ent->pwd);
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_compat_endpwent (void)
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{
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enum nss_status result;
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__libc_lock_lock (lock);
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result = internal_endpwent (&ext_ent);
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__libc_lock_unlock (lock);
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return result;
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}
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static enum nss_status
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getpwent_next_nis_netgr (const char *name, struct passwd *result, ent_t *ent,
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char *group, char *buffer, size_t buflen)
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{
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struct parser_data *data = (void *) buffer;
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char *ypdomain, *host, *user, *domain, *outval, *p, *p2;
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int status, outvallen;
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size_t p2len;
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if (yp_get_default_domain (&ypdomain) != YPERR_SUCCESS)
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{
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ent->netgroup = 0;
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ent->first = 0;
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give_pwd_free (&ent->pwd);
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return NSS_STATUS_UNAVAIL;
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}
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if (ent->first == TRUE)
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{
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memset (&ent->netgrdata, 0, sizeof (struct __netgrent));
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__internal_setnetgrent (group, &ent->netgrdata);
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ent->first = FALSE;
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}
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while (1)
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{
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char *saved_cursor;
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int parse_res;
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saved_cursor = ent->netgrdata.cursor;
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status = __internal_getnetgrent_r (&host, &user, &domain,
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&ent->netgrdata, buffer, buflen);
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if (status != 1)
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{
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__internal_endnetgrent (&ent->netgrdata);
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ent->netgroup = 0;
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give_pwd_free (&ent->pwd);
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return NSS_STATUS_RETURN;
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}
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if (user == NULL || user[0] == '-')
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continue;
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if (domain != NULL && strcmp (ypdomain, domain) != 0)
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continue;
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/* If name != NULL, we are called from getpwnam */
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if (name != NULL)
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if (strcmp (user, name) != 0)
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continue;
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if (yp_match (ypdomain, "passwd.byname", user,
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strlen (user), &outval, &outvallen)
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!= YPERR_SUCCESS)
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continue;
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p2len = pwd_need_buflen (&ent->pwd);
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if (p2len > buflen)
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{
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__set_errno (ERANGE);
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return NSS_STATUS_TRYAGAIN;
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}
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p2 = buffer + (buflen - p2len);
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buflen -= p2len;
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p = strncpy (buffer, outval, buflen);
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while (isspace (*p))
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p++;
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free (outval);
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if ((parse_res = _nss_files_parse_pwent (p, result, data, buflen)) == -1)
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{
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ent->netgrdata.cursor = saved_cursor;
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return NSS_STATUS_TRYAGAIN;
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}
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if (parse_res)
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{
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/* Store the User in the blacklist for the "+" at the end of
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/etc/passwd */
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blacklist_store_name (result->pw_name, ent);
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copy_pwd_changes (result, &ent->pwd, p2, p2len);
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break;
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}
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}
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return NSS_STATUS_SUCCESS;
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}
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static enum nss_status
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getpwent_next_nisplus_netgr (const char *name, struct passwd *result,
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ent_t *ent, char *group, char *buffer,
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size_t buflen)
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{
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char *ypdomain, *host, *user, *domain, *p2;
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int status, parse_res;
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size_t p2len;
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nis_result *nisres;
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/* Maybe we should use domainname here ? We need the current
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domainname for the domain field in netgroups */
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if (yp_get_default_domain (&ypdomain) != YPERR_SUCCESS)
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{
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ent->netgroup = 0;
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ent->first = 0;
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give_pwd_free (&ent->pwd);
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return NSS_STATUS_UNAVAIL;
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}
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if (ent->first == TRUE)
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{
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bzero (&ent->netgrdata, sizeof (struct __netgrent));
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__internal_setnetgrent (group, &ent->netgrdata);
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ent->first = FALSE;
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}
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while (1)
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{
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char *saved_cursor;
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saved_cursor = ent->netgrdata.cursor;
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status = __internal_getnetgrent_r (&host, &user, &domain,
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&ent->netgrdata, buffer, buflen);
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if (status != 1)
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{
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__internal_endnetgrent (&ent->netgrdata);
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ent->netgroup = 0;
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give_pwd_free (&ent->pwd);
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return NSS_STATUS_RETURN;
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}
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if (user == NULL || user[0] == '-')
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continue;
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if (domain != NULL && strcmp (ypdomain, domain) != 0)
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continue;
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/* If name != NULL, we are called from getpwnam */
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if (name != NULL)
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if (strcmp (user, name) != 0)
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continue;
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p2len = pwd_need_buflen (&ent->pwd);
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if (p2len > buflen)
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{
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__set_errno (ERANGE);
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return NSS_STATUS_TRYAGAIN;
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}
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p2 = buffer + (buflen - p2len);
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buflen -= p2len;
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{
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char buf[strlen (user) + 30 + pwdtablelen];
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sprintf(buf, "[name=%s],%s", user, pwdtable);
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nisres = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
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}
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if (niserr2nss (nisres->status) != NSS_STATUS_SUCCESS)
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{
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nis_freeresult (nisres);
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continue;
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}
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if ((parse_res = _nss_nisplus_parse_pwent (nisres, result, buffer,
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buflen)) == -1)
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{
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nis_freeresult (nisres);
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ent->netgrdata.cursor = saved_cursor;
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return NSS_STATUS_TRYAGAIN;
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}
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nis_freeresult (nisres);
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|
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if (parse_res)
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{
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/* Store the User in the blacklist for the "+" at the end of
|
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/etc/passwd */
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blacklist_store_name (result->pw_name, ent);
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copy_pwd_changes (result, &ent->pwd, p2, p2len);
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break;
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}
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}
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return NSS_STATUS_SUCCESS;
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}
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|
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static enum nss_status
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getpwent_next_nisplus (struct passwd *result, ent_t *ent, char *buffer,
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size_t buflen)
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|
{
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int parse_res;
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size_t p2len;
|
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char *p2;
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|
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p2len = pwd_need_buflen (&ent->pwd);
|
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if (p2len > buflen)
|
|
{
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__set_errno (ERANGE);
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return NSS_STATUS_TRYAGAIN;
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|
}
|
|
p2 = buffer + (buflen - p2len);
|
|
buflen -= p2len;
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do
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{
|
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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_pwd_free (&ent->pwd);
|
|
return niserr2nss (ent->result->status);
|
|
}
|
|
ent->first = FALSE;
|
|
}
|
|
else
|
|
{
|
|
nis_result *res;
|
|
|
|
res = nis_next_entry(pwdtable, &ent->result->cookie);
|
|
saved_res = ent->result;
|
|
saved_first = FALSE;
|
|
ent->result = res;
|
|
if (niserr2nss (ent->result->status) != NSS_STATUS_SUCCESS)
|
|
{
|
|
ent->nis = 0;
|
|
nis_freeresult (saved_res);
|
|
give_pwd_free (&ent->pwd);
|
|
return niserr2nss (ent->result->status);
|
|
}
|
|
}
|
|
if ((parse_res = _nss_nisplus_parse_pwent (ent->result, result, buffer,
|
|
buflen)) == -1)
|
|
{
|
|
nis_freeresult (ent->result);
|
|
ent->result = saved_res;
|
|
ent->first = saved_first;
|
|
__set_errno (ERANGE);
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
else
|
|
{
|
|
if (!saved_first)
|
|
nis_freeresult (saved_res);
|
|
}
|
|
|
|
if (parse_res &&
|
|
in_blacklist (result->pw_name, strlen (result->pw_name), ent))
|
|
parse_res = 0; /* if result->pw_name in blacklist,search next entry */
|
|
}
|
|
while (!parse_res);
|
|
|
|
copy_pwd_changes (result, &ent->pwd, p2, p2len);
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
static enum nss_status
|
|
getpwent_next_nis (struct passwd *result, ent_t *ent, char *buffer,
|
|
size_t buflen)
|
|
{
|
|
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_pwd_free (&ent->pwd);
|
|
return NSS_STATUS_UNAVAIL;
|
|
}
|
|
|
|
p2len = pwd_need_buflen (&ent->pwd);
|
|
if (p2len > buflen)
|
|
{
|
|
__set_errno (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, "passwd.byname", &outkey, &outkeylen,
|
|
&outval, &outvallen) != YPERR_SUCCESS)
|
|
{
|
|
ent->nis = 0;
|
|
give_pwd_free (&ent->pwd);
|
|
return NSS_STATUS_UNAVAIL;
|
|
}
|
|
|
|
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, "passwd.byname", ent->oldkey, ent->oldkeylen,
|
|
&outkey, &outkeylen, &outval, &outvallen)
|
|
!= YPERR_SUCCESS)
|
|
{
|
|
ent->nis = 0;
|
|
give_pwd_free (&ent->pwd);
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
|
|
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;
|
|
if ((parse_res = _nss_files_parse_pwent (p, result, data, buflen)) == -1)
|
|
{
|
|
free (ent->oldkey);
|
|
ent->oldkey = saved_oldkey;
|
|
ent->oldkeylen = saved_oldlen;
|
|
ent->first = saved_first;
|
|
__set_errno (ERANGE);
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
else
|
|
{
|
|
if (!saved_first)
|
|
free (saved_oldkey);
|
|
}
|
|
if (parse_res &&
|
|
in_blacklist (result->pw_name, strlen (result->pw_name), ent))
|
|
parse_res = 0;
|
|
}
|
|
while (!parse_res);
|
|
|
|
copy_pwd_changes (result, &ent->pwd, p2, p2len);
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
/* This function handle the +user entrys in /etc/passwd */
|
|
static enum nss_status
|
|
getpwnam_plususer (const char *name, struct passwd *result, char *buffer,
|
|
size_t buflen)
|
|
{
|
|
struct parser_data *data = (void *) buffer;
|
|
struct passwd pwd;
|
|
int parse_res;
|
|
char *p;
|
|
size_t plen;
|
|
|
|
memset (&pwd, '\0', sizeof (struct passwd));
|
|
|
|
copy_pwd_changes (&pwd, result, NULL, 0);
|
|
|
|
plen = pwd_need_buflen (&pwd);
|
|
if (plen > buflen)
|
|
{
|
|
__set_errno (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, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
|
|
if (niserr2nss (res->status) != NSS_STATUS_SUCCESS)
|
|
{
|
|
enum nss_status status = niserr2nss (res->status);
|
|
|
|
nis_freeresult (res);
|
|
return status;
|
|
}
|
|
if ((parse_res = _nss_nisplus_parse_pwent (res, result, buffer,
|
|
buflen)) == -1)
|
|
{
|
|
nis_freeresult (res);
|
|
__set_errno (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)
|
|
return NSS_STATUS_TRYAGAIN;
|
|
|
|
if (yp_match (domain, "passwd.byname", name, strlen (name),
|
|
&outval, &outvallen)
|
|
!= YPERR_SUCCESS)
|
|
return NSS_STATUS_TRYAGAIN;
|
|
ptr = strncpy (buffer, outval, buflen < (size_t) outvallen ?
|
|
buflen : (size_t) outvallen);
|
|
buffer[buflen < (size_t) outvallen ? buflen : (size_t) outvallen] = '\0';
|
|
free (outval);
|
|
while (isspace (*ptr))
|
|
ptr++;
|
|
if ((parse_res = _nss_files_parse_pwent (ptr, result, data, buflen))
|
|
== -1)
|
|
{
|
|
__set_errno (ERANGE);
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
}
|
|
|
|
if (parse_res > 0)
|
|
{
|
|
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;
|
|
}
|
|
|
|
static enum nss_status
|
|
getpwent_next_file (struct passwd *result, ent_t *ent,
|
|
char *buffer, size_t buflen)
|
|
{
|
|
struct parser_data *data = (void *) buffer;
|
|
while (1)
|
|
{
|
|
fpos_t pos;
|
|
char *p;
|
|
int parse_res;
|
|
|
|
do
|
|
{
|
|
fgetpos (ent->stream, &pos);
|
|
p = fgets (buffer, buflen, ent->stream);
|
|
if (p == NULL)
|
|
return NSS_STATUS_NOTFOUND;
|
|
|
|
/* 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)));
|
|
|
|
if (parse_res == -1)
|
|
{
|
|
/* The parser ran out of space. */
|
|
fsetpos (ent->stream, &pos);
|
|
__set_errno (ERANGE);
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
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')
|
|
{
|
|
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)))
|
|
{
|
|
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')
|
|
{
|
|
int status;
|
|
|
|
ent->netgroup = TRUE;
|
|
ent->first = TRUE;
|
|
copy_pwd_changes (&ent->pwd, result, NULL, 0);
|
|
|
|
if (use_nisplus)
|
|
status = getpwent_next_nisplus_netgr (NULL, result, ent,
|
|
&result->pw_name[2],
|
|
buffer, buflen);
|
|
else
|
|
status = getpwent_next_nis_netgr (NULL, result, ent,
|
|
&result->pw_name[2],
|
|
buffer, buflen);
|
|
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] != '@')
|
|
{
|
|
enum nss_status status;
|
|
|
|
/* Store the User in the blacklist for the "+" at the end of
|
|
/etc/passwd */
|
|
blacklist_store_name (&result->pw_name[1], ent);
|
|
status = getpwnam_plususer (&result->pw_name[1], result, buffer,
|
|
buflen);
|
|
if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
|
|
break;
|
|
else
|
|
if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
|
|
continue;
|
|
else
|
|
return status;
|
|
}
|
|
|
|
/* +:... */
|
|
if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
|
|
{
|
|
ent->nis = TRUE;
|
|
ent->first = TRUE;
|
|
copy_pwd_changes (&ent->pwd, result, NULL, 0);
|
|
|
|
if (use_nisplus)
|
|
return getpwent_next_nisplus (result, ent, buffer, buflen);
|
|
else
|
|
return getpwent_next_nis (result, ent, buffer, buflen);
|
|
}
|
|
}
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
static enum nss_status
|
|
internal_getpwent_r (struct passwd *pw, ent_t *ent, char *buffer,
|
|
size_t buflen)
|
|
{
|
|
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 = getpwent_next_nisplus_netgr (NULL, pw, ent, NULL, buffer,
|
|
buflen);
|
|
else
|
|
status = getpwent_next_nis_netgr (NULL, pw, ent, NULL, buffer, buflen);
|
|
if (status == NSS_STATUS_RETURN)
|
|
return getpwent_next_file (pw, ent, buffer, buflen);
|
|
else
|
|
return status;
|
|
}
|
|
else
|
|
if (ent->nis)
|
|
{
|
|
if (use_nisplus)
|
|
return getpwent_next_nisplus (pw, ent, buffer, buflen);
|
|
else
|
|
return getpwent_next_nis (pw, ent, buffer, buflen);
|
|
}
|
|
else
|
|
return getpwent_next_file (pw, ent, buffer, buflen);
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_compat_getpwent_r (struct passwd *pwd, char *buffer, size_t buflen)
|
|
{
|
|
enum nss_status status = NSS_STATUS_SUCCESS;
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
if (ni == NULL)
|
|
{
|
|
__nss_database_lookup ("passwd_compat", NULL, "nis", &ni);
|
|
use_nisplus = (strcmp (ni->name, "nisplus") == 0);
|
|
}
|
|
|
|
/* Be prepared that the setpwent function was not called before. */
|
|
if (ext_ent.stream == NULL)
|
|
status = internal_setpwent (&ext_ent);
|
|
|
|
if (status == NSS_STATUS_SUCCESS)
|
|
status = internal_getpwent_r (pwd, &ext_ent, buffer, buflen);
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
return status;
|
|
}
|
|
|
|
/* Searches in /etc/passwd and the NIS/NIS+ map for a special user */
|
|
static enum nss_status
|
|
internal_getpwnam_r (const char *name, struct passwd *result, ent_t *ent,
|
|
char *buffer, size_t buflen)
|
|
{
|
|
struct parser_data *data = (void *) buffer;
|
|
|
|
while (1)
|
|
{
|
|
fpos_t pos;
|
|
char *p;
|
|
int parse_res;
|
|
|
|
do
|
|
{
|
|
fgetpos (ent->stream, &pos);
|
|
p = fgets (buffer, buflen, ent->stream);
|
|
if (p == NULL)
|
|
{
|
|
if (feof (ent->stream))
|
|
return NSS_STATUS_NOTFOUND;
|
|
else
|
|
{
|
|
__set_errno (ERANGE);
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
}
|
|
|
|
/* 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)));
|
|
|
|
if (parse_res == -1)
|
|
{
|
|
/* The parser ran out of space. */
|
|
fsetpos (ent->stream, &pos);
|
|
__set_errno (ERANGE);
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
/* 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')
|
|
{
|
|
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)))
|
|
{
|
|
if (user != NULL && user[0] != '-')
|
|
if (strcmp (user, name) == 0)
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
__internal_endnetgrent (&netgrdata);
|
|
continue;
|
|
}
|
|
|
|
/* +@netgroup */
|
|
if (result->pw_name[0] == '+' && result->pw_name[1] == '@'
|
|
&& result->pw_name[2] != '\0')
|
|
{
|
|
char buf[strlen (result->pw_name)];
|
|
int status;
|
|
|
|
strcpy (buf, &result->pw_name[2]);
|
|
ent->netgroup = TRUE;
|
|
ent->first = TRUE;
|
|
copy_pwd_changes (&ent->pwd, result, NULL, 0);
|
|
|
|
do
|
|
{
|
|
if (use_nisplus)
|
|
status = getpwent_next_nisplus_netgr (name, result, ent, buf,
|
|
buffer, buflen);
|
|
else
|
|
status = getpwent_next_nis_netgr (name, result, ent, buf,
|
|
buffer, buflen);
|
|
if (status == NSS_STATUS_RETURN)
|
|
continue;
|
|
|
|
if (status == NSS_STATUS_SUCCESS &&
|
|
strcmp (result->pw_name, name) == 0)
|
|
return NSS_STATUS_SUCCESS;
|
|
} while (status == NSS_STATUS_SUCCESS);
|
|
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, buffer, buflen);
|
|
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, buffer, buflen);
|
|
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;
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_compat_getpwnam_r (const char *name, struct passwd *pwd,
|
|
char *buffer, size_t buflen)
|
|
{
|
|
ent_t ent = {0, 0, 0, NULL, 0, NULL, NULL, {NULL, 0, 0},
|
|
{NULL, NULL, 0, 0, NULL, NULL, NULL}};
|
|
enum nss_status status;
|
|
|
|
if (name[0] == '-' || name[0] == '+')
|
|
return NSS_STATUS_NOTFOUND;
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
if (ni == NULL)
|
|
{
|
|
__nss_database_lookup ("passwd_compat", NULL, "nis", &ni);
|
|
use_nisplus = (strcmp (ni->name, "nisplus") == 0);
|
|
}
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
status = internal_setpwent (&ent);
|
|
if (status != NSS_STATUS_SUCCESS)
|
|
return status;
|
|
|
|
status = internal_getpwnam_r (name, pwd, &ent, buffer, buflen);
|
|
|
|
internal_endpwent (&ent);
|
|
|
|
return status;
|
|
}
|
|
|
|
/* This function handle the + entry in /etc/passwd for getpwuid */
|
|
static enum nss_status
|
|
getpwuid_plususer (uid_t uid, struct passwd *result, char *buffer,
|
|
size_t buflen)
|
|
{
|
|
struct parser_data *data = (void *) buffer;
|
|
struct passwd pwd;
|
|
int parse_res;
|
|
char *p;
|
|
size_t plen;
|
|
|
|
memset (&pwd, '\0', sizeof (struct passwd));
|
|
|
|
copy_pwd_changes (&pwd, result, NULL, 0);
|
|
|
|
plen = pwd_need_buflen (&pwd);
|
|
if (plen > buflen)
|
|
{
|
|
__set_errno (ERANGE);
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
p = buffer + (buflen - plen);
|
|
buflen -= plen;
|
|
|
|
if (use_nisplus) /* Do the NIS+ query here */
|
|
{
|
|
nis_result *res;
|
|
char buf[1024 + pwdtablelen];
|
|
|
|
sprintf(buf, "[uid=%d],%s", uid, pwdtable);
|
|
res = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
|
|
if (niserr2nss (res->status) != NSS_STATUS_SUCCESS)
|
|
{
|
|
enum nss_status status = niserr2nss (res->status);
|
|
|
|
nis_freeresult (res);
|
|
return status;
|
|
}
|
|
if ((parse_res = _nss_nisplus_parse_pwent (res, result, buffer,
|
|
buflen)) == -1)
|
|
{
|
|
nis_freeresult (res);
|
|
__set_errno (ERANGE);
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
nis_freeresult (res);
|
|
}
|
|
else /* Use NIS */
|
|
{
|
|
char buf[1024];
|
|
char *domain, *outval, *ptr;
|
|
int outvallen;
|
|
|
|
if (yp_get_default_domain (&domain) != YPERR_SUCCESS)
|
|
return NSS_STATUS_TRYAGAIN;
|
|
|
|
sprintf (buf, "%d", uid);
|
|
if (yp_match (domain, "passwd.byuid", buf, strlen (buf),
|
|
&outval, &outvallen)
|
|
!= YPERR_SUCCESS)
|
|
return NSS_STATUS_TRYAGAIN;
|
|
ptr = strncpy (buffer, outval, buflen < (size_t) outvallen ?
|
|
buflen : (size_t) outvallen);
|
|
buffer[buflen < (size_t) outvallen ? buflen : (size_t) outvallen] = '\0';
|
|
free (outval);
|
|
while (isspace (*ptr))
|
|
ptr++;
|
|
if ((parse_res = _nss_files_parse_pwent (ptr, result, data, buflen))
|
|
== -1)
|
|
{
|
|
__set_errno (ERANGE);
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
}
|
|
|
|
if (parse_res > 0)
|
|
{
|
|
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;
|
|
}
|
|
|
|
/* Searches in /etc/passwd and the NIS/NIS+ map for a special user id */
|
|
static enum nss_status
|
|
internal_getpwuid_r (uid_t uid, struct passwd *result, ent_t *ent,
|
|
char *buffer, size_t buflen)
|
|
{
|
|
struct parser_data *data = (void *) buffer;
|
|
|
|
while (1)
|
|
{
|
|
fpos_t pos;
|
|
char *p;
|
|
int parse_res;
|
|
|
|
do
|
|
{
|
|
fgetpos (ent->stream, &pos);
|
|
p = fgets (buffer, buflen, ent->stream);
|
|
if (p == NULL)
|
|
return NSS_STATUS_NOTFOUND;
|
|
|
|
/* 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)));
|
|
|
|
if (parse_res == -1)
|
|
{
|
|
/* The parser ran out of space. */
|
|
fsetpos (ent->stream, &pos);
|
|
__set_errno (ERANGE);
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
/* 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')
|
|
{
|
|
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)))
|
|
{
|
|
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')
|
|
{
|
|
char buf[strlen (result->pw_name)];
|
|
int status;
|
|
|
|
strcpy (buf, &result->pw_name[2]);
|
|
ent->netgroup = TRUE;
|
|
ent->first = TRUE;
|
|
copy_pwd_changes (&ent->pwd, result, NULL, 0);
|
|
|
|
do
|
|
{
|
|
if (use_nisplus)
|
|
status = getpwent_next_nisplus_netgr (NULL, result, ent, buf,
|
|
buffer, buflen);
|
|
else
|
|
status = getpwent_next_nis_netgr (NULL, result, ent, buf,
|
|
buffer, buflen);
|
|
if (status == NSS_STATUS_RETURN)
|
|
continue;
|
|
|
|
if (status == NSS_STATUS_SUCCESS && uid == result->pw_uid)
|
|
return NSS_STATUS_SUCCESS;
|
|
} while (status == NSS_STATUS_SUCCESS);
|
|
continue;
|
|
}
|
|
|
|
/* -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] != '@')
|
|
{
|
|
enum nss_status status;
|
|
|
|
/* Store the User in the blacklist for the "+" at the end of
|
|
/etc/passwd */
|
|
blacklist_store_name (&result->pw_name[1], ent);
|
|
status = getpwnam_plususer (&result->pw_name[1], result, buffer,
|
|
buflen);
|
|
if (status == NSS_STATUS_SUCCESS && result->pw_uid == uid)
|
|
break;
|
|
else
|
|
continue;
|
|
}
|
|
|
|
/* +:... */
|
|
if (result->pw_name[0] == '+' && result->pw_name[1] == '\0')
|
|
{
|
|
enum nss_status status;
|
|
|
|
status = getpwuid_plususer (uid, result, buffer, buflen);
|
|
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;
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_compat_getpwuid_r (uid_t uid, struct passwd *pwd,
|
|
char *buffer, size_t buflen)
|
|
{
|
|
ent_t ent = {0, 0, 0, NULL, 0, NULL, NULL, {NULL, 0, 0},
|
|
{NULL, NULL, 0, 0, NULL, NULL, NULL}};
|
|
enum nss_status status;
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
if (ni == NULL)
|
|
{
|
|
__nss_database_lookup ("passwd_compat", NULL, "nis", &ni);
|
|
use_nisplus = (strcmp (ni->name, "nisplus") == 0);
|
|
}
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
status = internal_setpwent (&ent);
|
|
if (status != NSS_STATUS_SUCCESS)
|
|
return status;
|
|
|
|
status = internal_getpwuid_r (uid, pwd, &ent, buffer, buflen);
|
|
|
|
internal_endpwent (&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;
|
|
}
|