Change file mode I/O function handler
QNX SDP8.0Getting Started with the QNX OSDeveloperUser
Prototype:
int (*chmod) ( resmgr_context_t *ctp,
io_chmod_t *msg,
RESMGR_OCB_T *ocb )
Classification:
I/O functionDefault handler:
iofunc_chmod_default()Helper functions:
iofunc_ability_check(), iofunc_chmod()Client functions:
chmod(), fchmod(), fchmodat()Messages:
_IO_CHMODData structure:
struct _io_chmod {
uint16_t type;
uint16_t combine_len;
mode_t mode;
};
typedef union {
struct _io_chmod i;
} io_chmod_t;
Description:
Responsible for changing the mode for the resource identified by the passed ocb to the value specified by the mode message member.Returns:
The status via the helper macro _RESMGR_STATUS().Referenced by:
resmgr_io_funcs_t I/O tablePermission checking:
The default implementation iofunc_chmod_default() calls the helper function iofunc_chmod() to check that the client is the owner of the file (i.e., that it has the same user ID) and that it's not a read-only filesystem. The helper function also prevents the user from setting the sticky bit and the set group ID bit unless it is root.
Page updated: