DCMD_CHR_GETOBAND
QNX SDP8.0Devctl and Ioctl CommandsDeveloper
Get out-of-band data stored by a device
Synopsis:
#include <sys/dcmd_chr.h>
#define DCMD_CHR_GETOBAND __DIOF(_DCMD_CHR, 25, 0)
Arguments to devctl():
Argument | Value |
---|---|
filedes | A file descriptor that you obtained by opening the device. |
dcmd | DCMD_CHR_GETOBAND |
dev_data_ptr | A pointer to a char |
n_bytes | sizeof(char) |
dev_info_ptr | NULL |
Description:
This command obtains out of band data stored by the device. This is usually associated with a serial driver.
Input:
None.
Output:
A bitwise OR of the following _OBAND_SER_* bits. This encoding depends on the individual device.
- _OBAND_SER_EXTENDED — the device has extended data that you can get with the DCMD_CHR_GETOBAND_EXTENDED command.
- _OBAND_SER_OE — overrun error.
- _OBAND_SER_PE — parity error.
- _OBAND_SER_FE — framing error.
- _OBAND_SER_BI — break.
- _OBAND_SER_SW_OE — software overrun error.
- _OBAND_SER_MS — change in modem status.
- _OBAND_SER_RESUME — the device has resumed.
See also:
DCMD_CHR_GETOBAND_EXTENDED, DCMD_CHR_PUTOBAND
devctl() in the QNX OS C Library Reference
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