[ECOS] a question about fcntl() in ecos posix programming

[Indra Antonius Simalango <indra at vlsi dot itb dot ac dot id>]

Dear all,

Below are my quote snippet. It open a serial fax device as a File.
It returns 0 if OK, 1 if busy, 2 on error

-----------------------------------------------------------------------
int ttyopen ( TFILE *f, char *fname, int reverse, int hwfc )
{
  int flags, err=0 ;

  tinit ( f, open ( fname, O_RDWR | O_NOCTTY | O_NONBLOCK), reverse, hwfc 
) ;

  if ( f->fd < 0 ) {
    if ( errno == EBUSY ) {
      err = 1 ; 
    } else {
      err = msg ( "ES2can't open serial port %s:", fname ) ;
    }
  }

  if ( ! err ) {
    if ( ( flags = fcntl( f->fd, F_GETFL, 0 ) ) < 0 ||
	fcntl( f->fd, F_SETFL, ( flags & ~O_NONBLOCK ) ) < 0 )
      err = msg ( "ES2fax device fcntl failed %s:", fname ) ;
  }
...

-----------------------------------------------------------------------

It's successfully compiled and linked, but given an error message while 
running :

	Error : fax device fcntl failed /dev/ser1 : Not supported
 
I've read http://ecos.sourceware.org/docs-latest/ref/posix-input-and-output.html 
saying : Only the F_DUPFD command of fcntl() is currently implemented.

Is there any alternative way to do fcntl to set another flags , as mentioned 
in fcntl.h :

	/* File status flags used for open() and fcntl() */	
	#define O_APPEND     (1<<7)    /* Set append mode */
	#define O_DSYNC      (1<<8)    /* Synchronized I/O data integrity writes */
	#define O_NONBLOCK   (1<<9)    /* No delay */
	#define O_RSYNC      (1<<10)   /* Synchronized read I/O */
	#define O_SYNC       (1<<11)   /* Synchronized I/O file integrity writes */

Any suggestions are welcome.
Thank you.
-- 
	regards, 	

	IndrA on 11:47, Jul 27

	http://ic.ee.itb.ac.id/~antonius	


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