diff options
Diffstat (limited to 'cpukit/libfs/src/imfs/imfs_fchmod.c')
-rw-r--r-- | cpukit/libfs/src/imfs/imfs_fchmod.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/cpukit/libfs/src/imfs/imfs_fchmod.c b/cpukit/libfs/src/imfs/imfs_fchmod.c new file mode 100644 index 0000000000..06c2969100 --- /dev/null +++ b/cpukit/libfs/src/imfs/imfs_fchmod.c @@ -0,0 +1,55 @@ +/* + * IMFS file change mode routine. + * + * COPYRIGHT (c) 1989-1998. + * On-Line Applications Research Corporation (OAR). + * Copyright assigned to U.S. Government, 1994. + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.OARcorp.com/rtems/license.html. + * + * $Id$ + */ + +#include <errno.h> + +#include "libio_.h" +#include "imfs.h" + +int IMFS_fchmod( + rtems_filesystem_location_info_t *loc, + mode_t mode +) +{ + IMFS_jnode_t *jnode; +#if defined(RTEMS_POSIX_API) + uid_t st_uid; +#endif + + jnode = loc->node_access; + + /* + * Verify I am the owner of the node or the super user. + */ +#if defined(RTEMS_POSIX_API) + st_uid = geteuid(); + + if ( ( st_uid != jnode->st_uid ) && ( st_uid != 0 ) ) + set_errno_and_return_minus_one( EPERM ); +#endif + + /* + * Change only the RWX permissions on the jnode to mode. + */ + if ( mode & (~ (S_IRWXU | S_IRWXG | S_IRWXO ) ) ) + set_errno_and_return_minus_one( EPERM ); + + jnode->st_mode &= ~(S_IRWXU | S_IRWXG | S_IRWXO); + jnode->st_mode |= mode; + + IMFS_update_ctime( jnode ); + + return 0; +} + |