nsswitch: Move source3 files to top level dir.

Don't move source4 files yet to not confuse git's rename tracking too much.

1 files changed, 1477 insertions, 0 deletions

diff --git a/nsswitch/winbind_nss_linux.c b/nsswitch/winbind_nss_linux.c
new file mode 100644
index 0000000000..2b51a8e15d
--- /dev/null
+++ b/nsswitch/winbind_nss_linux.c
@@ -0,0 +1,1477 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   Windows NT Domain nsswitch module
+
+   Copyright (C) Tim Potter 2000
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   This 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 Lesser General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "winbind_client.h"
+
+#if HAVE_PTHREAD_H
+#include <pthread.h>
+#endif
+
+#if HAVE_PTHREAD
+static pthread_mutex_t winbind_nss_mutex = PTHREAD_MUTEX_INITIALIZER;
+#endif
+
+/* Maximum number of users to pass back over the unix domain socket
+   per call. This is not a static limit on the total number of users
+   or groups returned in total. */
+
+#define MAX_GETPWENT_USERS 250
+#define MAX_GETGRENT_USERS 250
+
+NSS_STATUS _nss_winbind_setpwent(void);
+NSS_STATUS _nss_winbind_endpwent(void);
+NSS_STATUS _nss_winbind_getpwent_r(struct passwd *result, char *buffer,
+				   size_t buflen, int *errnop);
+NSS_STATUS _nss_winbind_getpwuid_r(uid_t uid, struct passwd *result,
+				   char *buffer, size_t buflen, int *errnop);
+NSS_STATUS _nss_winbind_getpwnam_r(const char *name, struct passwd *result,
+				   char *buffer, size_t buflen, int *errnop);
+NSS_STATUS _nss_winbind_setgrent(void);
+NSS_STATUS _nss_winbind_endgrent(void);
+NSS_STATUS _nss_winbind_getgrent_r(struct group *result, char *buffer,
+				   size_t buflen, int *errnop);
+NSS_STATUS _nss_winbind_getgrlst_r(struct group *result, char *buffer,
+				   size_t buflen, int *errnop);
+NSS_STATUS _nss_winbind_getgrnam_r(const char *name, struct group *result,
+				   char *buffer, size_t buflen, int *errnop);
+NSS_STATUS _nss_winbind_getgrgid_r(gid_t gid, struct group *result, char *buffer,
+				   size_t buflen, int *errnop);
+NSS_STATUS _nss_winbind_initgroups_dyn(char *user, gid_t group, long int *start,
+				       long int *size, gid_t **groups,
+				       long int limit, int *errnop);
+NSS_STATUS _nss_winbind_getusersids(const char *user_sid, char **group_sids,
+				    int *num_groups, char *buffer, size_t buf_size,
+				    int *errnop);
+NSS_STATUS _nss_winbind_nametosid(const char *name, char **sid, char *buffer,
+				  size_t buflen, int *errnop);
+NSS_STATUS _nss_winbind_sidtoname(const char *sid, char **name, char *buffer,
+				  size_t buflen, int *errnop);
+NSS_STATUS _nss_winbind_sidtouid(const char *sid, uid_t *uid, int *errnop);
+NSS_STATUS _nss_winbind_sidtogid(const char *sid, gid_t *gid, int *errnop);
+NSS_STATUS _nss_winbind_uidtosid(uid_t uid, char **sid, char *buffer,
+				 size_t buflen, int *errnop);
+NSS_STATUS _nss_winbind_gidtosid(gid_t gid, char **sid, char *buffer,
+				 size_t buflen, int *errnop);
+
+/* Prototypes from wb_common.c */
+
+/* Allocate some space from the nss static buffer.  The buffer and buflen
+   are the pointers passed in by the C library to the _nss_ntdom_*
+   functions. */
+
+static char *get_static(char **buffer, size_t *buflen, size_t len)
+{
+	char *result;
+
+	/* Error check.  We return false if things aren't set up right, or
+	   there isn't enough buffer space left. */
+
+	if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) {
+		return NULL;
+	}
+
+	/* Return an index into the static buffer */
+
+	result = *buffer;
+	*buffer += len;
+	*buflen -= len;
+
+	return result;
+}
+
+/* I've copied the strtok() replacement function next_token_Xalloc() from
+   lib/util_str.c as I really don't want to have to link in any other
+   objects if I can possibly avoid it. */
+
+static bool next_token_alloc(const char **ptr,
+                                char **pp_buff,
+                                const char *sep)
+{
+	char *s;
+	char *saved_s;
+	char *pbuf;
+	bool quoted;
+	size_t len=1;
+
+	*pp_buff = NULL;
+	if (!ptr) {
+		return(false);
+	}
+
+	s = (char *)*ptr;
+
+	/* default to simple separators */
+	if (!sep) {
+		sep = " \t\n\r";
+	}
+
+	/* find the first non sep char */
+	while (*s && strchr(sep,*s)) {
+		s++;
+	}
+
+	/* nothing left? */
+	if (!*s) {
+		return false;
+	}
+
+	/* When restarting we need to go from here. */
+	saved_s = s;
+
+	/* Work out the length needed. */
+	for (quoted = false; *s &&
+			(quoted || !strchr(sep,*s)); s++) {
+		if (*s == '\"') {
+			quoted = !quoted;
+		} else {
+			len++;
+		}
+	}
+
+	/* We started with len = 1 so we have space for the nul. */
+	*pp_buff = (char *)malloc(len);
+	if (!*pp_buff) {
+		return false;
+	}
+
+	/* copy over the token */
+	pbuf = *pp_buff;
+	s = saved_s;
+	for (quoted = false; *s &&
+			(quoted || !strchr(sep,*s)); s++) {
+		if ( *s == '\"' ) {
+			quoted = !quoted;
+		} else {
+			*pbuf++ = *s;
+		}
+	}
+
+	*ptr = (*s) ? s+1 : s;
+	*pbuf = 0;
+
+	return true;
+}
+
+/* Fill a pwent structure from a winbindd_response structure.  We use
+   the static data passed to us by libc to put strings and stuff in.
+   Return NSS_STATUS_TRYAGAIN if we run out of memory. */
+
+static NSS_STATUS fill_pwent(struct passwd *result,
+				  struct winbindd_pw *pw,
+				  char **buffer, size_t *buflen)
+{
+	/* User name */
+
+	if ((result->pw_name =
+	     get_static(buffer, buflen, strlen(pw->pw_name) + 1)) == NULL) {
+
+		/* Out of memory */
+
+		return NSS_STATUS_TRYAGAIN;
+	}
+
+	strcpy(result->pw_name, pw->pw_name);
+
+	/* Password */
+
+	if ((result->pw_passwd =
+	     get_static(buffer, buflen, strlen(pw->pw_passwd) + 1)) == NULL) {
+
+		/* Out of memory */
+
+		return NSS_STATUS_TRYAGAIN;
+	}
+
+	strcpy(result->pw_passwd, pw->pw_passwd);
+
+	/* [ug]id */
+
+	result->pw_uid = pw->pw_uid;
+	result->pw_gid = pw->pw_gid;
+
+	/* GECOS */
+
+	if ((result->pw_gecos =
+	     get_static(buffer, buflen, strlen(pw->pw_gecos) + 1)) == NULL) {
+
+		/* Out of memory */
+
+		return NSS_STATUS_TRYAGAIN;
+	}
+
+	strcpy(result->pw_gecos, pw->pw_gecos);
+
+	/* Home directory */
+
+	if ((result->pw_dir =
+	     get_static(buffer, buflen, strlen(pw->pw_dir) + 1)) == NULL) {
+
+		/* Out of memory */
+
+		return NSS_STATUS_TRYAGAIN;
+	}
+
+	strcpy(result->pw_dir, pw->pw_dir);
+
+	/* Logon shell */
+
+	if ((result->pw_shell =
+	     get_static(buffer, buflen, strlen(pw->pw_shell) + 1)) == NULL) {
+
+		/* Out of memory */
+
+		return NSS_STATUS_TRYAGAIN;
+	}
+
+	strcpy(result->pw_shell, pw->pw_shell);
+
+	/* The struct passwd for Solaris has some extra fields which must
+	   be initialised or nscd crashes. */
+
+#if HAVE_PASSWD_PW_COMMENT
+	result->pw_comment = "";
+#endif
+
+#if HAVE_PASSWD_PW_AGE
+	result->pw_age = "";
+#endif
+
+	return NSS_STATUS_SUCCESS;
+}
+
+/* Fill a grent structure from a winbindd_response structure.  We use
+   the static data passed to us by libc to put strings and stuff in.
+   Return NSS_STATUS_TRYAGAIN if we run out of memory. */
+
+static NSS_STATUS fill_grent(struct group *result, struct winbindd_gr *gr,
+		      char *gr_mem, char **buffer, size_t *buflen)
+{
+	char *name;
+	int i;
+	char *tst;
+
+	/* Group name */
+
+	if ((result->gr_name =
+	     get_static(buffer, buflen, strlen(gr->gr_name) + 1)) == NULL) {
+
+		/* Out of memory */
+
+		return NSS_STATUS_TRYAGAIN;
+	}
+
+	strcpy(result->gr_name, gr->gr_name);
+
+	/* Password */
+
+	if ((result->gr_passwd =
+	     get_static(buffer, buflen, strlen(gr->gr_passwd) + 1)) == NULL) {
+
+		/* Out of memory */
+		return NSS_STATUS_TRYAGAIN;
+	}
+
+	strcpy(result->gr_passwd, gr->gr_passwd);
+
+	/* gid */
+
+	result->gr_gid = gr->gr_gid;
+
+	/* Group membership */
+
+	if ((gr->num_gr_mem < 0) || !gr_mem) {
+		gr->num_gr_mem = 0;
+	}
+
+	/* this next value is a pointer to a pointer so let's align it */
+
+	/* Calculate number of extra bytes needed to align on pointer size boundry */
+	if ((i = (unsigned long)(*buffer) % sizeof(char*)) != 0)
+		i = sizeof(char*) - i;
+
+	if ((tst = get_static(buffer, buflen, ((gr->num_gr_mem + 1) *
+				 sizeof(char *)+i))) == NULL) {
+
+		/* Out of memory */
+
+		return NSS_STATUS_TRYAGAIN;
+	}
+	result->gr_mem = (char **)(tst + i);
+
+	if (gr->num_gr_mem == 0) {
+
+		/* Group is empty */
+
+		*(result->gr_mem) = NULL;
+		return NSS_STATUS_SUCCESS;
+	}
+
+	/* Start looking at extra data */
+
+	i = 0;
+
+	while(next_token_alloc((const char **)&gr_mem, &name, ",")) {
+		/* Allocate space for member */
+		if (((result->gr_mem)[i] =
+		     get_static(buffer, buflen, strlen(name) + 1)) == NULL) {
+			free(name);
+			/* Out of memory */
+			return NSS_STATUS_TRYAGAIN;
+		}
+		strcpy((result->gr_mem)[i], name);
+		free(name);
+		i++;
+	}
+
+	/* Terminate list */
+
+	(result->gr_mem)[i] = NULL;
+
+	return NSS_STATUS_SUCCESS;
+}
+
+/*
+ * NSS user functions
+ */
+
+static struct winbindd_response getpwent_response;
+
+static int ndx_pw_cache;                 /* Current index into pwd cache */
+static int num_pw_cache;                 /* Current size of pwd cache */
+
+/* Rewind "file pointer" to start of ntdom password database */
+
+NSS_STATUS
+_nss_winbind_setpwent(void)
+{
+	NSS_STATUS ret;
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: setpwent\n", getpid());
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	if (num_pw_cache > 0) {
+		ndx_pw_cache = num_pw_cache = 0;
+		winbindd_free_response(&getpwent_response);
+	}
+
+	ret = winbindd_request_response(WINBINDD_SETPWENT, NULL, NULL);
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: setpwent returns %s (%d)\n", getpid(),
+		nss_err_str(ret), ret);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+	return ret;
+}
+
+/* Close ntdom password database "file pointer" */
+
+NSS_STATUS
+_nss_winbind_endpwent(void)
+{
+	NSS_STATUS ret;
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: endpwent\n", getpid());
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	if (num_pw_cache > 0) {
+		ndx_pw_cache = num_pw_cache = 0;
+		winbindd_free_response(&getpwent_response);
+	}
+
+	ret = winbindd_request_response(WINBINDD_ENDPWENT, NULL, NULL);
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: endpwent returns %s (%d)\n", getpid(),
+		nss_err_str(ret), ret);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+/* Fetch the next password entry from ntdom password database */
+
+NSS_STATUS
+_nss_winbind_getpwent_r(struct passwd *result, char *buffer,
+			size_t buflen, int *errnop)
+{
+	NSS_STATUS ret;
+	struct winbindd_request request;
+	static int called_again;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getpwent\n", getpid());
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	/* Return an entry from the cache if we have one, or if we are
+	   called again because we exceeded our static buffer.  */
+
+	if ((ndx_pw_cache < num_pw_cache) || called_again) {
+		goto return_result;
+	}
+
+	/* Else call winbindd to get a bunch of entries */
+
+	if (num_pw_cache > 0) {
+		winbindd_free_response(&getpwent_response);
+	}
+
+	ZERO_STRUCT(request);
+	ZERO_STRUCT(getpwent_response);
+
+	request.data.num_entries = MAX_GETPWENT_USERS;
+
+	ret = winbindd_request_response(WINBINDD_GETPWENT, &request,
+			       &getpwent_response);
+
+	if (ret == NSS_STATUS_SUCCESS) {
+		struct winbindd_pw *pw_cache;
+
+		/* Fill cache */
+
+		ndx_pw_cache = 0;
+		num_pw_cache = getpwent_response.data.num_entries;
+
+		/* Return a result */
+
+	return_result:
+
+		pw_cache = (struct winbindd_pw *)
+			getpwent_response.extra_data.data;
+
+		/* Check data is valid */
+
+		if (pw_cache == NULL) {
+			ret = NSS_STATUS_NOTFOUND;
+			goto done;
+		}
+
+		ret = fill_pwent(result, &pw_cache[ndx_pw_cache],
+				 &buffer, &buflen);
+
+		/* Out of memory - try again */
+
+		if (ret == NSS_STATUS_TRYAGAIN) {
+			called_again = true;
+			*errnop = errno = ERANGE;
+			goto done;
+		}
+
+		*errnop = errno = 0;
+		called_again = false;
+		ndx_pw_cache++;
+
+		/* If we've finished with this lot of results free cache */
+
+		if (ndx_pw_cache == num_pw_cache) {
+			ndx_pw_cache = num_pw_cache = 0;
+			winbindd_free_response(&getpwent_response);
+		}
+	}
+	done:
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getpwent returns %s (%d)\n", getpid(),
+		nss_err_str(ret), ret);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+	return ret;
+}
+
+/* Return passwd struct from uid */
+
+NSS_STATUS
+_nss_winbind_getpwuid_r(uid_t uid, struct passwd *result, char *buffer,
+			size_t buflen, int *errnop)
+{
+	NSS_STATUS ret;
+	static struct winbindd_response response;
+	struct winbindd_request request;
+	static int keep_response;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getpwuid_r %d\n", getpid(), (unsigned int)uid);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	/* If our static buffer needs to be expanded we are called again */
+	if (!keep_response || uid != response.data.pw.pw_uid) {
+
+		/* Call for the first time */
+
+		ZERO_STRUCT(response);
+		ZERO_STRUCT(request);
+
+		request.data.uid = uid;
+
+		ret = winbindd_request_response(WINBINDD_GETPWUID, &request, &response);
+
+		if (ret == NSS_STATUS_SUCCESS) {
+			ret = fill_pwent(result, &response.data.pw,
+					 &buffer, &buflen);
+
+			if (ret == NSS_STATUS_TRYAGAIN) {
+				keep_response = true;
+				*errnop = errno = ERANGE;
+				goto done;
+			}
+		}
+
+	} else {
+
+		/* We've been called again */
+
+		ret = fill_pwent(result, &response.data.pw, &buffer, &buflen);
+
+		if (ret == NSS_STATUS_TRYAGAIN) {
+			*errnop = errno = ERANGE;
+			goto done;
+		}
+
+		keep_response = false;
+		*errnop = errno = 0;
+	}
+
+	winbindd_free_response(&response);
+
+	done:
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getpwuid %d returns %s (%d)\n", getpid(),
+		(unsigned int)uid, nss_err_str(ret), ret);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+/* Return passwd struct from username */
+NSS_STATUS
+_nss_winbind_getpwnam_r(const char *name, struct passwd *result, char *buffer,
+			size_t buflen, int *errnop)
+{
+	NSS_STATUS ret;
+	static struct winbindd_response response;
+	struct winbindd_request request;
+	static int keep_response;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getpwnam_r %s\n", getpid(), name);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	/* If our static buffer needs to be expanded we are called again */
+
+	if (!keep_response || strcmp(name,response.data.pw.pw_name) != 0) {
+
+		/* Call for the first time */
+
+		ZERO_STRUCT(response);
+		ZERO_STRUCT(request);
+
+		strncpy(request.data.username, name,
+			sizeof(request.data.username) - 1);
+		request.data.username
+			[sizeof(request.data.username) - 1] = '\0';
+
+		ret = winbindd_request_response(WINBINDD_GETPWNAM, &request, &response);
+
+		if (ret == NSS_STATUS_SUCCESS) {
+			ret = fill_pwent(result, &response.data.pw, &buffer,
+					 &buflen);
+
+			if (ret == NSS_STATUS_TRYAGAIN) {
+				keep_response = true;
+				*errnop = errno = ERANGE;
+				goto done;
+			}
+		}
+
+	} else {
+
+		/* We've been called again */
+
+		ret = fill_pwent(result, &response.data.pw, &buffer, &buflen);
+
+		if (ret == NSS_STATUS_TRYAGAIN) {
+			keep_response = true;
+			*errnop = errno = ERANGE;
+			goto done;
+		}
+
+		keep_response = false;
+		*errnop = errno = 0;
+	}
+
+	winbindd_free_response(&response);
+	done:
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getpwnam %s returns %s (%d)\n", getpid(),
+		name, nss_err_str(ret), ret);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+/*
+ * NSS group functions
+ */
+
+static struct winbindd_response getgrent_response;
+
+static int ndx_gr_cache;                 /* Current index into grp cache */
+static int num_gr_cache;                 /* Current size of grp cache */
+
+/* Rewind "file pointer" to start of ntdom group database */
+
+NSS_STATUS
+_nss_winbind_setgrent(void)
+{
+	NSS_STATUS ret;
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: setgrent\n", getpid());
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	if (num_gr_cache > 0) {
+		ndx_gr_cache = num_gr_cache = 0;
+		winbindd_free_response(&getgrent_response);
+	}
+
+	ret = winbindd_request_response(WINBINDD_SETGRENT, NULL, NULL);
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: setgrent returns %s (%d)\n", getpid(),
+		nss_err_str(ret), ret);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+/* Close "file pointer" for ntdom group database */
+
+NSS_STATUS
+_nss_winbind_endgrent(void)
+{
+	NSS_STATUS ret;
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: endgrent\n", getpid());
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	if (num_gr_cache > 0) {
+		ndx_gr_cache = num_gr_cache = 0;
+		winbindd_free_response(&getgrent_response);
+	}
+
+	ret = winbindd_request_response(WINBINDD_ENDGRENT, NULL, NULL);
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: endgrent returns %s (%d)\n", getpid(),
+		nss_err_str(ret), ret);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+/* Get next entry from ntdom group database */
+
+static NSS_STATUS
+winbind_getgrent(enum winbindd_cmd cmd,
+		 struct group *result,
+		 char *buffer, size_t buflen, int *errnop)
+{
+	NSS_STATUS ret;
+	static struct winbindd_request request;
+	static int called_again;
+
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getgrent\n", getpid());
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	/* Return an entry from the cache if we have one, or if we are
+	   called again because we exceeded our static buffer.  */
+
+	if ((ndx_gr_cache < num_gr_cache) || called_again) {
+		goto return_result;
+	}
+
+	/* Else call winbindd to get a bunch of entries */
+
+	if (num_gr_cache > 0) {
+		winbindd_free_response(&getgrent_response);
+	}
+
+	ZERO_STRUCT(request);
+	ZERO_STRUCT(getgrent_response);
+
+	request.data.num_entries = MAX_GETGRENT_USERS;
+
+	ret = winbindd_request_response(cmd, &request,
+			       &getgrent_response);
+
+	if (ret == NSS_STATUS_SUCCESS) {
+		struct winbindd_gr *gr_cache;
+		int mem_ofs;
+
+		/* Fill cache */
+
+		ndx_gr_cache = 0;
+		num_gr_cache = getgrent_response.data.num_entries;
+
+		/* Return a result */
+
+	return_result:
+
+		gr_cache = (struct winbindd_gr *)
+			getgrent_response.extra_data.data;
+
+		/* Check data is valid */
+
+		if (gr_cache == NULL) {
+			ret = NSS_STATUS_NOTFOUND;
+			goto done;
+		}
+
+		/* Fill group membership.  The offset into the extra data
+		   for the group membership is the reported offset plus the
+		   size of all the winbindd_gr records returned. */
+
+		mem_ofs = gr_cache[ndx_gr_cache].gr_mem_ofs +
+			num_gr_cache * sizeof(struct winbindd_gr);
+
+		ret = fill_grent(result, &gr_cache[ndx_gr_cache],
+				 ((char *)getgrent_response.extra_data.data)+mem_ofs,
+				 &buffer, &buflen);
+
+		/* Out of memory - try again */
+
+		if (ret == NSS_STATUS_TRYAGAIN) {
+			called_again = true;
+			*errnop = errno = ERANGE;
+			goto done;
+		}
+
+		*errnop = 0;
+		called_again = false;
+		ndx_gr_cache++;
+
+		/* If we've finished with this lot of results free cache */
+
+		if (ndx_gr_cache == num_gr_cache) {
+			ndx_gr_cache = num_gr_cache = 0;
+			winbindd_free_response(&getgrent_response);
+		}
+	}
+	done:
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getgrent returns %s (%d)\n", getpid(),
+		nss_err_str(ret), ret);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+
+NSS_STATUS
+_nss_winbind_getgrent_r(struct group *result,
+			char *buffer, size_t buflen, int *errnop)
+{
+	return winbind_getgrent(WINBINDD_GETGRENT, result, buffer, buflen, errnop);
+}
+
+NSS_STATUS
+_nss_winbind_getgrlst_r(struct group *result,
+			char *buffer, size_t buflen, int *errnop)
+{
+	return winbind_getgrent(WINBINDD_GETGRLST, result, buffer, buflen, errnop);
+}
+
+/* Return group struct from group name */
+
+NSS_STATUS
+_nss_winbind_getgrnam_r(const char *name,
+			struct group *result, char *buffer,
+			size_t buflen, int *errnop)
+{
+	NSS_STATUS ret;
+	static struct winbindd_response response;
+	struct winbindd_request request;
+	static int keep_response;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getgrnam %s\n", getpid(), name);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	/* If our static buffer needs to be expanded we are called again */
+	/* Or if the stored response group name differs from the request. */
+
+	if (!keep_response || strcmp(name,response.data.gr.gr_name) != 0) {
+
+		/* Call for the first time */
+
+		ZERO_STRUCT(request);
+		ZERO_STRUCT(response);
+
+		strncpy(request.data.groupname, name,
+			sizeof(request.data.groupname));
+		request.data.groupname
+			[sizeof(request.data.groupname) - 1] = '\0';
+
+		ret = winbindd_request_response(WINBINDD_GETGRNAM, &request, &response);
+
+		if (ret == NSS_STATUS_SUCCESS) {
+			ret = fill_grent(result, &response.data.gr,
+					 (char *)response.extra_data.data,
+					 &buffer, &buflen);
+
+			if (ret == NSS_STATUS_TRYAGAIN) {
+				keep_response = true;
+				*errnop = errno = ERANGE;
+				goto done;
+			}
+		}
+
+	} else {
+
+		/* We've been called again */
+
+		ret = fill_grent(result, &response.data.gr,
+				 (char *)response.extra_data.data, &buffer,
+				 &buflen);
+
+		if (ret == NSS_STATUS_TRYAGAIN) {
+			keep_response = true;
+			*errnop = errno = ERANGE;
+			goto done;
+		}
+
+		keep_response = false;
+		*errnop = 0;
+	}
+
+	winbindd_free_response(&response);
+	done:
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getgrnam %s returns %s (%d)\n", getpid(),
+		name, nss_err_str(ret), ret);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+/* Return group struct from gid */
+
+NSS_STATUS
+_nss_winbind_getgrgid_r(gid_t gid,
+			struct group *result, char *buffer,
+			size_t buflen, int *errnop)
+{
+	NSS_STATUS ret;
+	static struct winbindd_response response;
+	struct winbindd_request request;
+	static int keep_response;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getgrgid %d\n", getpid(), gid);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	/* If our static buffer needs to be expanded we are called again */
+	/* Or if the stored response group name differs from the request. */
+
+	if (!keep_response || gid != response.data.gr.gr_gid) {
+
+		/* Call for the first time */
+
+		ZERO_STRUCT(request);
+		ZERO_STRUCT(response);
+
+		request.data.gid = gid;
+
+		ret = winbindd_request_response(WINBINDD_GETGRGID, &request, &response);
+
+		if (ret == NSS_STATUS_SUCCESS) {
+
+			ret = fill_grent(result, &response.data.gr,
+					 (char *)response.extra_data.data,
+					 &buffer, &buflen);
+
+			if (ret == NSS_STATUS_TRYAGAIN) {
+				keep_response = true;
+				*errnop = errno = ERANGE;
+				goto done;
+			}
+		}
+
+	} else {
+
+		/* We've been called again */
+
+		ret = fill_grent(result, &response.data.gr,
+				 (char *)response.extra_data.data, &buffer,
+				 &buflen);
+
+		if (ret == NSS_STATUS_TRYAGAIN) {
+			keep_response = true;
+			*errnop = errno = ERANGE;
+			goto done;
+		}
+
+		keep_response = false;
+		*errnop = 0;
+	}
+
+	winbindd_free_response(&response);
+	done:
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getgrgid %d returns %s (%d)\n", getpid(),
+		(unsigned int)gid, nss_err_str(ret), ret);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+	return ret;
+}
+
+/* Initialise supplementary groups */
+
+NSS_STATUS
+_nss_winbind_initgroups_dyn(char *user, gid_t group, long int *start,
+			    long int *size, gid_t **groups, long int limit,
+			    int *errnop)
+{
+	NSS_STATUS ret;
+	struct winbindd_request request;
+	struct winbindd_response response;
+	int i;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: initgroups %s (%d)\n", getpid(),
+		user, group);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	ZERO_STRUCT(request);
+	ZERO_STRUCT(response);
+
+	strncpy(request.data.username, user,
+		sizeof(request.data.username) - 1);
+
+	ret = winbindd_request_response(WINBINDD_GETGROUPS, &request, &response);
+
+	if (ret == NSS_STATUS_SUCCESS) {
+		int num_gids = response.data.num_entries;
+		gid_t *gid_list = (gid_t *)response.extra_data.data;
+
+#ifdef DEBUG_NSS
+		fprintf(stderr, "[%5d]: initgroups %s: got NSS_STATUS_SUCCESS "
+				"and %d gids\n", getpid(),
+				user, num_gids);
+#endif
+		if (gid_list == NULL) {
+			ret = NSS_STATUS_NOTFOUND;
+			goto done;
+		}
+
+		/* Copy group list to client */
+
+		for (i = 0; i < num_gids; i++) {
+
+#ifdef DEBUG_NSS
+			fprintf(stderr, "[%5d]: initgroups %s (%d): "
+					"processing gid %d \n", getpid(),
+					user, group, gid_list[i]);
+#endif
+
+			/* Skip primary group */
+
+			if (gid_list[i] == group) {
+				continue;
+			}
+
+			/* Filled buffer ? If so, resize. */
+
+			if (*start == *size) {
+				long int newsize;
+				gid_t *newgroups;
+
+				newsize = 2 * (*size);
+				if (limit > 0) {
+					if (*size == limit) {
+						goto done;
+					}
+					if (newsize > limit) {
+						newsize = limit;
+					}
+				}
+
+				newgroups = (gid_t *)
+					realloc((*groups),
+						newsize * sizeof(**groups));
+				if (!newgroups) {
+					*errnop = ENOMEM;
+					ret = NSS_STATUS_NOTFOUND;
+					goto done;
+				}
+				*groups = newgroups;
+				*size = newsize;
+			}
+
+			/* Add to buffer */
+
+			(*groups)[*start] = gid_list[i];
+			*start += 1;
+		}
+	}
+
+	/* Back to your regularly scheduled programming */
+
+ done:
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: initgroups %s returns %s (%d)\n", getpid(),
+		user, nss_err_str(ret), ret);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+
+/* return a list of group SIDs for a user SID */
+NSS_STATUS
+_nss_winbind_getusersids(const char *user_sid, char **group_sids,
+			 int *num_groups,
+			 char *buffer, size_t buf_size, int *errnop)
+{
+	NSS_STATUS ret;
+	struct winbindd_request request;
+	struct winbindd_response response;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: getusersids %s\n", getpid(), user_sid);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	ZERO_STRUCT(request);
+	ZERO_STRUCT(response);
+
+	strncpy(request.data.sid, user_sid,sizeof(request.data.sid) - 1);
+	request.data.sid[sizeof(request.data.sid) - 1] = '\0';
+
+	ret = winbindd_request_response(WINBINDD_GETUSERSIDS, &request, &response);
+
+	if (ret != NSS_STATUS_SUCCESS) {
+		goto done;
+	}
+
+	if (buf_size < response.length - sizeof(response)) {
+		ret = NSS_STATUS_TRYAGAIN;
+		errno = *errnop = ERANGE;
+		goto done;
+	}
+
+	*num_groups = response.data.num_entries;
+	*group_sids = buffer;
+	memcpy(buffer, response.extra_data.data, response.length - sizeof(response));
+	errno = *errnop = 0;
+
+ done:
+	winbindd_free_response(&response);
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+
+/* map a user or group name to a SID string */
+NSS_STATUS
+_nss_winbind_nametosid(const char *name, char **sid, char *buffer,
+		       size_t buflen, int *errnop)
+{
+	NSS_STATUS ret;
+	struct winbindd_response response;
+	struct winbindd_request request;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: nametosid %s\n", getpid(), name);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	ZERO_STRUCT(response);
+	ZERO_STRUCT(request);
+
+	strncpy(request.data.name.name, name,
+		sizeof(request.data.name.name) - 1);
+	request.data.name.name[sizeof(request.data.name.name) - 1] = '\0';
+
+	ret = winbindd_request_response(WINBINDD_LOOKUPNAME, &request, &response);
+	if (ret != NSS_STATUS_SUCCESS) {
+		*errnop = errno = EINVAL;
+		goto failed;
+	}
+
+	if (buflen < strlen(response.data.sid.sid)+1) {
+		ret = NSS_STATUS_TRYAGAIN;
+		*errnop = errno = ERANGE;
+		goto failed;
+	}
+
+	*errnop = errno = 0;
+	*sid = buffer;
+	strcpy(*sid, response.data.sid.sid);
+
+failed:
+	winbindd_free_response(&response);
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+/* map a sid string to a user or group name */
+NSS_STATUS
+_nss_winbind_sidtoname(const char *sid, char **name, char *buffer,
+		       size_t buflen, int *errnop)
+{
+	NSS_STATUS ret;
+	struct winbindd_response response;
+	struct winbindd_request request;
+	static char sep_char;
+	unsigned needed;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: sidtoname %s\n", getpid(), sid);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	ZERO_STRUCT(response);
+	ZERO_STRUCT(request);
+
+	/* we need to fetch the separator first time through */
+	if (!sep_char) {
+		ret = winbindd_request_response(WINBINDD_INFO, &request, &response);
+		if (ret != NSS_STATUS_SUCCESS) {
+			*errnop = errno = EINVAL;
+			goto failed;
+		}
+
+		sep_char = response.data.info.winbind_separator;
+		winbindd_free_response(&response);
+	}
+
+
+	strncpy(request.data.sid, sid,
+		sizeof(request.data.sid) - 1);
+	request.data.sid[sizeof(request.data.sid) - 1] = '\0';
+
+	ret = winbindd_request_response(WINBINDD_LOOKUPSID, &request, &response);
+	if (ret != NSS_STATUS_SUCCESS) {
+		*errnop = errno = EINVAL;
+		goto failed;
+	}
+
+	needed =
+		strlen(response.data.name.dom_name) +
+		strlen(response.data.name.name) + 2;
+
+	if (buflen < needed) {
+		ret = NSS_STATUS_TRYAGAIN;
+		*errnop = errno = ERANGE;
+		goto failed;
+	}
+
+	snprintf(buffer, needed, "%s%c%s",
+		 response.data.name.dom_name,
+		 sep_char,
+		 response.data.name.name);
+
+	*name = buffer;
+	*errnop = errno = 0;
+
+failed:
+	winbindd_free_response(&response);
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+/* map a sid to a uid */
+NSS_STATUS
+_nss_winbind_sidtouid(const char *sid, uid_t *uid, int *errnop)
+{
+	NSS_STATUS ret;
+	struct winbindd_response response;
+	struct winbindd_request request;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: sidtouid %s\n", getpid(), sid);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	ZERO_STRUCT(request);
+	ZERO_STRUCT(response);
+
+	strncpy(request.data.sid, sid, sizeof(request.data.sid) - 1);
+	request.data.sid[sizeof(request.data.sid) - 1] = '\0';
+
+	ret = winbindd_request_response(WINBINDD_SID_TO_UID, &request, &response);
+	if (ret != NSS_STATUS_SUCCESS) {
+		*errnop = errno = EINVAL;
+		goto failed;
+	}
+
+	*uid = response.data.uid;
+
+failed:
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+/* map a sid to a gid */
+NSS_STATUS
+_nss_winbind_sidtogid(const char *sid, gid_t *gid, int *errnop)
+{
+	NSS_STATUS ret;
+	struct winbindd_response response;
+	struct winbindd_request request;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5d]: sidtogid %s\n", getpid(), sid);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	ZERO_STRUCT(request);
+	ZERO_STRUCT(response);
+
+	strncpy(request.data.sid, sid, sizeof(request.data.sid) - 1);
+	request.data.sid[sizeof(request.data.sid) - 1] = '\0';
+
+	ret = winbindd_request_response(WINBINDD_SID_TO_GID, &request, &response);
+	if (ret != NSS_STATUS_SUCCESS) {
+		*errnop = errno = EINVAL;
+		goto failed;
+	}
+
+	*gid = response.data.gid;
+
+failed:
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+/* map a uid to a SID string */
+NSS_STATUS
+_nss_winbind_uidtosid(uid_t uid, char **sid, char *buffer,
+		      size_t buflen, int *errnop)
+{
+	NSS_STATUS ret;
+	struct winbindd_response response;
+	struct winbindd_request request;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5u]: uidtosid %u\n", (unsigned int)getpid(), (unsigned int)uid);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	ZERO_STRUCT(response);
+	ZERO_STRUCT(request);
+
+	request.data.uid = uid;
+
+	ret = winbindd_request_response(WINBINDD_UID_TO_SID, &request, &response);
+	if (ret != NSS_STATUS_SUCCESS) {
+		*errnop = errno = EINVAL;
+		goto failed;
+	}
+
+	if (buflen < strlen(response.data.sid.sid)+1) {
+		ret = NSS_STATUS_TRYAGAIN;
+		*errnop = errno = ERANGE;
+		goto failed;
+	}
+
+	*errnop = errno = 0;
+	*sid = buffer;
+	strcpy(*sid, response.data.sid.sid);
+
+failed:
+	winbindd_free_response(&response);
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}
+
+/* map a gid to a SID string */
+NSS_STATUS
+_nss_winbind_gidtosid(gid_t gid, char **sid, char *buffer,
+		      size_t buflen, int *errnop)
+{
+	NSS_STATUS ret;
+	struct winbindd_response response;
+	struct winbindd_request request;
+
+#ifdef DEBUG_NSS
+	fprintf(stderr, "[%5u]: gidtosid %u\n", (unsigned int)getpid(), (unsigned int)gid);
+#endif
+
+#if HAVE_PTHREAD
+	pthread_mutex_lock(&winbind_nss_mutex);
+#endif
+
+	ZERO_STRUCT(response);
+	ZERO_STRUCT(request);
+
+	request.data.gid = gid;
+
+	ret = winbindd_request_response(WINBINDD_GID_TO_SID, &request, &response);
+	if (ret != NSS_STATUS_SUCCESS) {
+		*errnop = errno = EINVAL;
+		goto failed;
+	}
+
+	if (buflen < strlen(response.data.sid.sid)+1) {
+		ret = NSS_STATUS_TRYAGAIN;
+		*errnop = errno = ERANGE;
+		goto failed;
+	}
+
+	*errnop = errno = 0;
+	*sid = buffer;
+	strcpy(*sid, response.data.sid.sid);
+
+failed:
+	winbindd_free_response(&response);
+
+#if HAVE_PTHREAD
+	pthread_mutex_unlock(&winbind_nss_mutex);
+#endif
+
+	return ret;
+}