DCMD_F3S_SETCMP
QNX SDP8.0Devctl and Ioctl CommandsDeveloper
Set compresssion on for a flash filesystem
Synopsis:
#include <sys/dcmd_f3s.h>
#define DCMD_F3S_SETCMP __DIOT(_DCMD_F3S, F3S_SETCMP, f3s_cmdcmp_t)
Arguments to devctl():
Argument | Value |
---|---|
filedes | A file descriptor that you obtained by opening the device. |
dcmd | DCMD_F3S_SETCMP |
dev_data_ptr | A pointer to a f3s_cmdcmp_t structure (see below) |
n_bytes | sizeof(f3s_cmdcmp_t) |
dev_info_ptr | NULL |
Description:
This command sets compression on for a flash filesystem.
Input:
A pointer to a f3s_cmdcmp_t structure:
typedef struct f3s_cmdcmp_s
{
uint32_t status; /* cmdcmp status */
uint32_t cmp_flag; /* compression flag */
}
f3s_cmdcmp_t;
The input isn't actually used.
Output:
None.
See also:
DCMD_F3S_CLRCMP, DCMD_F3S_GETCMP
devctl() in the QNX OS C Library Reference
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