forked from Imagelibrary/rtems
baef823cd5
Check iop reference count in close() and return -1 with errno set to EBUSY in case the file descriptor is still in use. Update #3132.
79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
/**
|
|
* @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.
|
|
*/
|
|
|
|
#if 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;
|
|
}
|