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/* user.c - set user id, group id and group access list */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2018 The OpenLDAP Foundation.
* Portions Copyright 1999 PM Lashley.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#include "portable.h"
#if defined(HAVE_SETUID) && defined(HAVE_SETGID)
#include <stdio.h>
#include <ac/stdlib.h>
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#include <ac/ctype.h>
#include <ac/unistd.h>
#include "slap.h"
#include "lutil.h"
/*
* Set real and effective user id and group id, and group access list
* The user and group arguments are freed.
*/
void
slap_init_user( char *user, char *group )
{
uid_t uid = 0;
gid_t gid = 0;
int got_uid = 0, got_gid = 0;
if ( user ) {
struct passwd *pwd;
if ( isdigit( (unsigned char) *user ) ) {
unsigned u;
got_uid = 1;
if ( lutil_atou( &u, user ) != 0 ) {
Debug( LDAP_DEBUG_ANY, "Unble to parse user %s\n",
user, 0, 0 );
exit( EXIT_FAILURE );
}
uid = (uid_t)u;
#ifdef HAVE_GETPWUID
pwd = getpwuid( uid );
goto did_getpw;
#else
free( user );
user = NULL;
#endif
} else {
pwd = getpwnam( user );
did_getpw:
if ( pwd == NULL ) {
Debug( LDAP_DEBUG_ANY, "No passwd entry for user %s\n",
user, 0, 0 );
exit( EXIT_FAILURE );
}
if ( got_uid ) {
free( user );
user = (pwd != NULL ? ch_strdup( pwd->pw_name ) : NULL);
} else {
got_uid = 1;
uid = pwd->pw_uid;
}
got_gid = 1;
gid = pwd->pw_gid;
#ifdef HAVE_ENDPWENT
endpwent();
#endif
}
}
if ( group ) {
struct group *grp;
if ( isdigit( (unsigned char) *group )) {
unsigned g;
if ( lutil_atou( &g, group ) != 0 ) {
Debug( LDAP_DEBUG_ANY, "Unble to parse group %s\n",
group, 0, 0 );
exit( EXIT_FAILURE );
}
gid = (uid_t)g;
#ifdef HAVE_GETGRGID
grp = getgrgid( gid );
goto did_group;
#endif
} else {
grp = getgrnam( group );
if ( grp != NULL )
gid = grp->gr_gid;
did_group:
if ( grp == NULL ) {
Debug( LDAP_DEBUG_ANY, "No group entry for group %s\n",
group, 0, 0 );
exit( EXIT_FAILURE );
}
}
free( group );
got_gid = 1;
}
if ( user ) {
if ( getuid() == 0 && initgroups( user, gid ) != 0 ) {
Debug( LDAP_DEBUG_ANY,
"Could not set the group access (gid) list\n", 0, 0, 0 );
exit( EXIT_FAILURE );
}
free( user );
}
#ifdef HAVE_ENDGRENT
endgrent();
#endif
if ( got_gid ) {
if ( setgid( gid ) != 0 ) {
Debug( LDAP_DEBUG_ANY, "Could not set real group id to %d\n",
(int) gid, 0, 0 );
exit( EXIT_FAILURE );
}
#ifdef HAVE_SETEGID
if ( setegid( gid ) != 0 ) {
Debug( LDAP_DEBUG_ANY, "Could not set effective group id to %d\n",
(int) gid, 0, 0 );
exit( EXIT_FAILURE );
}
#endif
}
if ( got_uid ) {
if ( setuid( uid ) != 0 ) {
Debug( LDAP_DEBUG_ANY, "Could not set real user id to %d\n",
(int) uid, 0, 0 );
exit( EXIT_FAILURE );
}
#ifdef HAVE_SETEUID
if ( seteuid( uid ) != 0 ) {
Debug( LDAP_DEBUG_ANY, "Could not set effective user id to %d\n",
(int) uid, 0, 0 );
exit( EXIT_FAILURE );
}
#endif
}
}
#endif /* HAVE_PWD_H && HAVE_GRP_H */
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