+enum nss_status
+get_local_group(const char *name, struct group *grp, char *buffer, size_t buflen, int *errnop)
+{
+ enum nss_status status = NSS_STATUS_NOTFOUND;
+ struct group gbuf;
+ struct group *gbufp = &gbuf;
+ int ret;
+ int old_errno = errno;
+ int len = MAGIC_LOCAL_GR_BUFLEN;
+ char *buf = malloc(len);
+ if (buf == NULL) {
+ *errnop = ENOMEM;
+ errno = old_errno;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ errno = 0;
+ ret = getgrnam_r(name, gbufp, buf, len, &gbufp);
+ if (ret != 0) {
+ *errnop = old_errno;
+ status = NSS_STATUS_TRYAGAIN;
+ } else if (gbufp != NULL) {
+ status = NSS_STATUS_SUCCESS;
+ grp->gr_name = strncpy(buffer, gbufp->gr_name, buflen);
+ buffer = buffer + strlen(grp->gr_name);
+ buflen = buflen - strlen(grp->gr_name);
+ grp->gr_passwd = strncpy(buffer, gbufp->gr_passwd, buflen);
+ buffer = buffer + strlen(grp->gr_passwd);
+ buflen = buflen - strlen(grp->gr_passwd);
+ grp->gr_gid = gbufp->gr_gid;
+ if (buflen < sizeof(void *)) {
+ *errnop = ERANGE;
+ status = NSS_STATUS_TRYAGAIN;
+ }
+ else {
+ grp->gr_mem = memset(buffer, 0, sizeof(void *));
+ }
+ }
+ free(buf);
+ errno = old_errno;
+ return status;
+}