CDOpen (FUN)

FUNCTION CDOpen : RTS_IEC_HANDLE

Open a character device file. Given a pathname for a file, open() returns a file descriptor handle for use in subsequent system calls (read(), write(), ioctl(), etc.).

InOut:

Scope

Name

Type

Comment

Return

CDOpen

RTS_IEC_HANDLE

Handle or RTS_INVALID_HANDLE if failed.

Input

szFile

STRING(80)
File name. File name must be an absolute path to the

file. Path entries must be separated with a ‘/’ and not with a ‘"!

dFlags

DINT
Requested ACCESS_MODE for fileaccess: dwFlags must include one of the following flags:

  • O_RDONLY: read-only access

  • O_WRONLY: write-only access

  • O_RDWR: read/write access

Optional flags for fileaccess: See linux man page for Details

pResult

POINTER TO DINT

Pointer to linux errno error code, 0 is ok