Re: problem in open sys call

[Holger Kiehl <Holger.Kiehl@dwd.de>]

On Wed, 21 Apr 2004, joy wrote:

> Huber, George K RDECOM CERDEC STCD SRI wrote:
> 
> >Hi,
> >
> >Try this:
> >
> >      if((fd=open(opcode, O_RDONLY))==-1)
> >      {
> >        printf("Open failed, error code: %d\n%s\n", errno, strerror(errno)
> >      }
> >      >you may need to add errno.h and string.h to the list of includes. This
> will
> >give you the error code and desctiption of why open is failing.
> >
> >
> thanks a lot, george but I think Glynn hit the nail on the head. the
> code was working fine before I added the opcode variable in main
> and totlly neglected to see it while gdb'ing.
> 
But George and others also made a good point. With programming it is always
good practice to write good error messages and always try to be more
verbose. Believe me this can save you a lot of time! I even go so far
to always print out __FILE__ and __LINE__, so I know exacly where the
error has happened.

Holger