DCMD_CHR_PARCTL
QNX SDP8.0Devctl and Ioctl CommandsDeveloper
Control a parallel device
Synopsis:
#include <sys/dcmd_chr.h>
#define DCMD_CHR_PARCTL __DIOT(_DCMD_CHR, 98, int)
Arguments to devctl():
Argument | Value |
---|---|
filedes | A file descriptor that you obtained by opening the device. |
dcmd | DCMD_CHR_PARCTL |
dev_data_ptr | A pointer to an int |
n_bytes | sizeof(int) |
dev_info_ptr | NULL |
Description:
This command controls the control lines of a parallel device. It isn't currently used.
Input:
The action to take.
Output:
None.
See also:
devctl() in the QNX OS C Library Reference
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