DCMD_F3S_LOCK
QNX SDP8.0Devctl and Ioctl CommandsDeveloper
Lock a partition
Synopsis:
#include <sys/dcmd_f3s.h>
#define DCMD_F3S_LOCK __DIOT(_DCMD_F3S, F3S_LOCK, f3s_unitlock_t)
Arguments to devctl():
| Argument | Value |
|---|---|
| filedes | A file descriptor that you obtained by opening the device. |
| dcmd | DCMD_F3S_LOCK |
| dev_data_ptr | A pointer to a f3s_unitlock_t structure (see below) |
| n_bytes | sizeof(f3s_unitlock_t) |
| dev_info_ptr | NULL |
Description:
This command locks a partition.
Input:
A f3s_unitlock_t structure:
typedef struct f3s_unitlock_s
{
uint32_t status; /* lock status */
uint32_t offset; /* offset of first unit expressed in bytes */
uint32_t limit; /* limit of last unit expressed in bytes */
}
f3s_unitlock_t;
Output:
None.
See also:
DCMD_F3S_UNLOCK, DCMD_F3S_UNLOCKALL
devctl() in the QNX OS C Library Reference
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