177 lines
3.6 KiB
C
177 lines
3.6 KiB
C
/* user.c - set user id, group id and group access list */
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/* $OpenLDAP: pkg/ldap/servers/slapd/user.c,v 1.25.2.3 2008/02/11 23:26:45 kurt Exp $ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 1998-2008 The OpenLDAP Foundation.
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* Portions Copyright 1999 PM Lashley.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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#include "portable.h"
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#if defined(HAVE_SETUID) && defined(HAVE_SETGID)
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#include <stdio.h>
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#include <ac/stdlib.h>
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#ifdef HAVE_PWD_H
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#include <pwd.h>
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#endif
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#ifdef HAVE_GRP_H
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#include <grp.h>
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#endif
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#include <ac/ctype.h>
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#include <ac/unistd.h>
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#include "slap.h"
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#include "lutil.h"
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/*
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* Set real and effective user id and group id, and group access list
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* The user and group arguments are freed.
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*/
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void
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slap_init_user( char *user, char *group )
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{
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uid_t uid = 0;
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gid_t gid = 0;
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int got_uid = 0, got_gid = 0;
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if ( user ) {
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struct passwd *pwd;
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if ( isdigit( (unsigned char) *user ) ) {
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unsigned u;
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got_uid = 1;
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if ( lutil_atou( &u, user ) != 0 ) {
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Debug( LDAP_DEBUG_ANY, "Unble to parse user %s\n",
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user, 0, 0 );
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exit( EXIT_FAILURE );
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}
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uid = (uid_t)u;
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#ifdef HAVE_GETPWUID
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pwd = getpwuid( uid );
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goto did_getpw;
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#else
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free( user );
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user = NULL;
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#endif
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} else {
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pwd = getpwnam( user );
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did_getpw:
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if ( pwd == NULL ) {
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Debug( LDAP_DEBUG_ANY, "No passwd entry for user %s\n",
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user, 0, 0 );
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exit( EXIT_FAILURE );
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}
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if ( got_uid ) {
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free( user );
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user = (pwd != NULL ? ch_strdup( pwd->pw_name ) : NULL);
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} else {
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got_uid = 1;
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uid = pwd->pw_uid;
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}
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got_gid = 1;
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gid = pwd->pw_gid;
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#ifdef HAVE_ENDPWENT
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endpwent();
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#endif
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}
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}
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if ( group ) {
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struct group *grp;
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if ( isdigit( (unsigned char) *group )) {
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unsigned g;
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if ( lutil_atou( &g, group ) != 0 ) {
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Debug( LDAP_DEBUG_ANY, "Unble to parse group %s\n",
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group, 0, 0 );
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exit( EXIT_FAILURE );
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}
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gid = (uid_t)g;
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#ifdef HAVE_GETGRGID
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grp = getgrgid( gid );
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goto did_group;
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#endif
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} else {
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grp = getgrnam( group );
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if ( grp != NULL )
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gid = grp->gr_gid;
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did_group:
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if ( grp == NULL ) {
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Debug( LDAP_DEBUG_ANY, "No group entry for group %s\n",
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group, 0, 0 );
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exit( EXIT_FAILURE );
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}
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}
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free( group );
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got_gid = 1;
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}
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if ( user ) {
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if ( getuid() == 0 && initgroups( user, gid ) != 0 ) {
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Debug( LDAP_DEBUG_ANY,
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"Could not set the group access (gid) list\n", 0, 0, 0 );
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exit( EXIT_FAILURE );
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}
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free( user );
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}
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#ifdef HAVE_ENDGRENT
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endgrent();
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#endif
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if ( got_gid ) {
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if ( setgid( gid ) != 0 ) {
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Debug( LDAP_DEBUG_ANY, "Could not set real group id to %d\n",
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(int) gid, 0, 0 );
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exit( EXIT_FAILURE );
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}
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#ifdef HAVE_SETEGID
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if ( setegid( gid ) != 0 ) {
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Debug( LDAP_DEBUG_ANY, "Could not set effective group id to %d\n",
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(int) gid, 0, 0 );
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exit( EXIT_FAILURE );
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}
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#endif
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}
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if ( got_uid ) {
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if ( setuid( uid ) != 0 ) {
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Debug( LDAP_DEBUG_ANY, "Could not set real user id to %d\n",
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(int) uid, 0, 0 );
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exit( EXIT_FAILURE );
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}
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#ifdef HAVE_SETEUID
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if ( seteuid( uid ) != 0 ) {
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Debug( LDAP_DEBUG_ANY, "Could not set effective user id to %d\n",
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(int) uid, 0, 0 );
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exit( EXIT_FAILURE );
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}
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#endif
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}
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}
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#endif /* HAVE_PWD_H && HAVE_GRP_H */
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