Updated: April 19, 2023 |
Default handler for _IO_UTIME messages
#include <sys/iofunc.h> int iofunc_utime_default( resmgr_context_t* ctp, io_utime_t* msg, iofunc_ocb_t* ocb );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The iofunc_utime_default() function implements POSIX semantics for the client's utime() call, which is received as an _IO_UTIME message by the resource manager.
You can place this function directly into the resmgr_io_funcs_t table passed as the io_funcs argument to resmgr_attach(), at the utime position, or you can call iofunc_func_init() to initialize all of the functions to their default values.
The iofunc_utime_default() function calls iofunc_utime() to do the actual work. It verifies that the client has the necessary permissions to effect a utime on the device. If so, the utime is performed, modifying elements of the ocb->attr structure. This function takes care of updating these bits in the flags member of ocb->attr:
The iofunc_utime() function then calls iofunc_time_update() to update the appropriate time fields in ocb->attr.
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | Yes |
Thread | Yes |