/* Copyright (c) 1997, 1998, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997. The GNU C 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 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <errno.h> #include <string.h> #include <unistd.h> #include <libintl.h> #include <rpcsvc/nis.h> nis_name nis_local_group (void) { static char __nisgroup[NIS_MAXNAMELEN + 1]; char *cptr; if (__nisgroup[0] == '\0' && (cptr = getenv ("NIS_GROUP")) != NULL && strlen (cptr) < NIS_MAXNAMELEN) { char *cp = stpcpy (__nisgroup, cptr); if (cp[-1] != '.') { cptr = nis_local_directory (); if ((cp - __nisgroup) + strlen (cptr) + 1 < NIS_MAXNAMELEN) { *cp++ = '.'; strcpy (cp, cptr); } else __nisgroup[0] = '\0'; } } return __nisgroup; } libnsl_hidden_def (nis_local_group) nis_name nis_local_directory (void) { static char __nisdomainname[NIS_MAXNAMELEN + 1]; if (__nisdomainname[0] == '\0') { if (getdomainname (__nisdomainname, NIS_MAXNAMELEN) < 0) __nisdomainname[0] = '\0'; else { char *cp = strchr (__nisdomainname, '\0'); /* Missing trailing dot? */ if (cp[-1] != '.') { *cp++ = '.'; *cp = '\0'; } } } return __nisdomainname; } libnsl_hidden_def (nis_local_directory) nis_name nis_local_principal (void) { static char __principal[NIS_MAXNAMELEN + 1]; if (__principal[0] == '\0') { char buf[NIS_MAXNAMELEN + 1]; nis_result *res; uid_t uid = geteuid (); if (uid != 0) { int len = snprintf (buf, NIS_MAXNAMELEN - 1, "[auth_name=%d,auth_type=LOCAL],cred.org_dir.%s", uid, nis_local_directory ()); if (len >= NIS_MAXNAMELEN - 1) nobody: /* XXX The buffer is too small. Can this happen??? */ return strcpy (__principal, "nobody"); if (buf[len - 1] != '.') { buf[len++] = '.'; buf[len] = '\0'; } res = nis_list (buf, USE_DGRAM + NO_AUTHINFO + FOLLOW_LINKS + FOLLOW_PATH, NULL, NULL); if (res == NULL) goto nobody; if (NIS_RES_STATUS (res) == NIS_SUCCESS) { if (res->objects.objects_len > 1) { /* More than one principal with same uid? something wrong with cred table. Should be unique. Warn user and continue. */ printf (_("\ LOCAL entry for UID %d in directory %s not unique\n"), uid, nis_local_directory ()); } strcpy (__principal, ENTRY_VAL (res->objects.objects_val, 0)); nis_freeresult (res); return __principal; } else { nis_freeresult (res); goto nobody; } } else return strcpy (__principal, nis_local_host ()); /* Should be never reached */ goto nobody; } return __principal; } libnsl_hidden_def (nis_local_principal) nis_name nis_local_host (void) { static char __nishostname[NIS_MAXNAMELEN + 1]; if (__nishostname[0] == '\0') { if (gethostname (__nishostname, NIS_MAXNAMELEN) < 0) __nishostname[0] = '\0'; else { char *cp = strchr (__nishostname, '\0'); int len = cp - __nishostname; /* Hostname already fully qualified? */ if (cp[-1] == '.') return __nishostname; if (len + strlen (nis_local_directory ()) + 1 > NIS_MAXNAMELEN) { __nishostname[0] = '\0'; return __nishostname; } *cp++ = '.'; strncpy (cp, nis_local_directory (), NIS_MAXNAMELEN - len -1); __nishostname[NIS_MAXNAMELEN] = '\0'; } } return __nishostname; } libnsl_hidden_def (nis_local_host)