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/**
* @file
*
* @brief Change Owner and Group of a File
* @ingroup libcsupport
*/
/*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <unistd.h>
#include <rtems/libio_.h>
int rtems_filesystem_chown(
const rtems_filesystem_location_info_t *loc,
uid_t owner,
gid_t group
)
{
const rtems_filesystem_mount_table_entry_t *mt_entry = loc->mt_entry;
int rv;
if ( mt_entry->writeable || rtems_filesystem_location_is_null( loc ) ) {
struct stat st;
memset( &st, 0, sizeof(st) );
rv = (*loc->handlers->fstat_h)( loc, &st );
if ( rv == 0 ) {
uid_t uid = geteuid();
if ( uid == 0 || st.st_uid == uid ) {
rv = (*mt_entry->ops->chown_h)( loc, owner, group );
} else {
errno = EPERM;
rv = -1;
}
}
} else {
errno = EROFS;
rv = -1;
}
return rv;
}
/**
* POSIX 1003.1b 5.6.5 - Change Owner and Group of a File
*/
int fchown( int fd, uid_t owner, gid_t group )
{
int rv;
rtems_libio_t *iop;
LIBIO_GET_IOP( fd, iop );
rtems_filesystem_instance_lock( &iop->pathinfo );
rv = rtems_filesystem_chown( &iop->pathinfo, owner, group );
rtems_filesystem_instance_unlock( &iop->pathinfo );
rtems_libio_iop_drop( iop );
return rv;
}
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