[Emc-developers] The Max Length of a File Name is Incorrect -- And I'd like an enhancement to Axis.

[Kenneth L. <Ken...@se...>]

In file: emc_nml.hh, line 1449 the structure element file is declared as 
      "char file[LINELEN];".  If my understanding is correct, this 
variable may contain the full path name of a file.

The maximum length of a file name is PATH_MAX characters (which is 
defined as 4096 characters in /usr/include/linux/limits.h). Of course, 
in the usual linux style, we also have MAXPATHLEN which is defined as 
PATH_MAX in sys/param.h.

I'm not sure which of these to use in the interp (right now, I'm using 
PATH_MAX).

The issue come up regarding a change I'd like in Axis. Axis doesn't know 
when the interpreter starts to interpret a new file. I added that 
ability as part of the subroutine stuff. If the sub isn't defined in the 
current file, the interp looks for a file of that name and starts 
interpreting there. It works just fine -- but none of the gui's know 
about it. I discovered that problem when I successfully ran my first 
program containing wizard generated code.

[This is an issue for all of the gui's; not just Axis.]

I can fix the file size problem. It's just changing LINELEN to PATH_MAX. 
I'm concerned though, that doing that might break other stuff. I can 
probably also make it so that the structure containing "file" is updated 
when the file is changed.

I'd be (very) hesitant, though, to dig into Axis and change it.

Thoughts on the subject would be appreciated.

Thanks,

Ken





-- 
Kenneth Lerman
Mark Kenny Products Company, LLC
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