/*
compile like this:
- cc -o wbtest wbtest.c -ldl
+ cc -o wbtest wbtest.c nss_winbind.c -ldl
and run like this:
#include <string.h>
#include <sys/types.h>
-typedef enum nss_status NSS_STATUS;
-
-struct nss_state {
- void *dl_handle;
- char *nss_name;
- char pwnam_buf[512];
-};
-
-/*
- find a function in the nss library
-*/
-static void *find_fn(struct nss_state *nss, const char *name)
-{
- void *res;
- char *s = NULL;
-
- asprintf(&s, "_nss_%s_%s", nss->nss_name, name);
- if (!s) {
- errno = ENOMEM;
- return NULL;
- }
- res = dlsym(nss->dl_handle, s);
- free(s);
- if (!res) {
- errno = ENOENT;
- return NULL;
- }
- return res;
-}
-
-/*
- establish a link to the nss library
- Return 0 on success and -1 on error
-*/
-int nss_open(struct nss_state *nss, const char *nss_path)
-{
- char *p;
- p = strrchr(nss_path, '_');
- if (!p) {
- errno = EINVAL;
- return -1;
- }
-
- nss->nss_name = strdup(p+1);
- p = strchr(nss->nss_name, '.');
- if (p) *p = 0;
-
- nss->dl_handle = dlopen(nss_path, RTLD_LAZY);
- if (!nss->dl_handle) {
- free(nss->nss_name);
- return -1;
- }
-
- return 0;
-}
-
-/*
- close and cleanup a nss state
-*/
-void nss_close(struct nss_state *nss)
-{
- free(nss->nss_name);
- dlclose(nss->dl_handle);
-}
-
-/*
- make a getpwnam call.
- Return 0 on success and -1 on error
-*/
-int nss_getpwent(struct nss_state *nss, struct passwd *pwd)
-{
- NSS_STATUS (*_nss_getpwent_r)(struct passwd *, char *,
- size_t , int *) = find_fn(nss, "getpwent_r");
- NSS_STATUS status;
- int nss_errno = 0;
-
- if (!_nss_getpwent_r) {
- return -1;
- }
-
- status = _nss_getpwent_r(pwd, nss->pwnam_buf, sizeof(nss->pwnam_buf), &nss_errno);
- if (status == NSS_STATUS_NOTFOUND) {
- errno = ENOENT;
- return -1;
- }
- if (status != NSS_STATUS_SUCCESS) {
- errno = nss_errno;
- return -1;
- }
-
- return 0;
-}
-
-/*
- make a setpwent call.
- Return 0 on success and -1 on error
-*/
-int nss_setpwent(struct nss_state *nss)
-{
- NSS_STATUS (*_nss_setpwent)(void) = find_fn(nss, "setpwent");
- NSS_STATUS status;
- if (!_nss_setpwent) {
- return -1;
- }
- status = _nss_setpwent();
- if (status != NSS_STATUS_SUCCESS) {
- errno = EINVAL;
- return -1;
- }
- return 0;
-}
-
-/*
- make a endpwent call.
- Return 0 on success and -1 on error
-*/
-int nss_endpwent(struct nss_state *nss)
-{
- NSS_STATUS (*_nss_endpwent)(void) = find_fn(nss, "endpwent");
- NSS_STATUS status;
- if (!_nss_endpwent) {
- return -1;
- }
- status = _nss_endpwent();
- if (status != NSS_STATUS_SUCCESS) {
- errno = EINVAL;
- return -1;
- }
- return 0;
-}
-
-
-/*
- convert a name to a SID
- caller frees
- Return 0 on success and -1 on error
-*/
-int nss_nametosid(struct nss_state *nss, const char *name, char **sid)
-{
- NSS_STATUS (*_nss_nametosid)(const char *, char **, char *, size_t, int *) =
- find_fn(nss, "nametosid");
- NSS_STATUS status;
- int nss_errno = 0;
- char buf[200];
-
- if (!_nss_nametosid) {
- return -1;
- }
-
- status = _nss_nametosid(name, sid, buf, sizeof(buf), &nss_errno);
- if (status == NSS_STATUS_NOTFOUND) {
- errno = ENOENT;
- return -1;
- }
- if (status != NSS_STATUS_SUCCESS) {
- errno = nss_errno;
- return -1;
- }
-
- *sid = strdup(*sid);
-
- return 0;
-}
-
-/*
- convert a SID to a name
- caller frees
- Return 0 on success and -1 on error
-*/
-int nss_sidtoname(struct nss_state *nss, char *sid, char **name)
-{
- NSS_STATUS (*_nss_sidtoname)(const char *, char **, char *, size_t, int *) =
- find_fn(nss, "sidtoname");
- NSS_STATUS status;
- int nss_errno = 0;
- char buf[200];
-
- if (!_nss_sidtoname) {
- return -1;
- }
-
- status = _nss_sidtoname(sid, name, buf, sizeof(buf), &nss_errno);
- if (status == NSS_STATUS_NOTFOUND) {
- errno = ENOENT;
- return -1;
- }
- if (status != NSS_STATUS_SUCCESS) {
- errno = nss_errno;
- return -1;
- }
-
- *name = strdup(*name);
-
- return 0;
-}
-
-/*
- return a list of group SIDs for a user SID
- the returned list is NULL terminated
- Return 0 on success and -1 on error
-*/
-int nss_getusersids(struct nss_state *nss, const char *user_sid, char ***sids)
-{
- NSS_STATUS (*_nss_getusersids)(const char *, char **, int *, char *, size_t, int *) =
- find_fn(nss, "getusersids");
- NSS_STATUS status;
- int nss_errno = 0;
- char *s;
- int i, num_groups = 0;
- unsigned bufsize = 10;
- char *buf;
-
- if (!_nss_getusersids) {
- return -1;
- }
-
-again:
- buf = malloc(bufsize);
- if (!buf) {
- errno = ENOMEM;
- return -1;
- }
-
- status = _nss_getusersids(user_sid, &s, &num_groups, buf, bufsize, &nss_errno);
- if (status == NSS_STATUS_NOTFOUND) {
- errno = ENOENT;
- free(buf);
- return -1;
- }
-
- if (status == NSS_STATUS_TRYAGAIN) {
- bufsize *= 2;
- free(buf);
- goto again;
- }
-
- if (status != NSS_STATUS_SUCCESS) {
- free(buf);
- errno = nss_errno;
- return -1;
- }
-
- if (num_groups == 0) {
- free(buf);
- return 0;
- }
-
- *sids = (char **)malloc(sizeof(char *) * (num_groups+1));
- if (! *sids) {
- errno = ENOMEM;
- free(buf);
- return -1;
- }
-
- for (i=0;i<num_groups;i++) {
- (*sids)[i] = strdup(s);
- s += strlen(s) + 1;
- }
- (*sids)[i] = NULL;
-
- free(buf);
-
- return 0;
-}
-
+#include "nss_winbind.h"
static int nss_test_users(struct nss_state *nss)
{
git.samba.org / ira / wip.git / blobdiff