Re:GNU C + Pro*C Help?

Walter,

    Since I just finished pulling a pile of hair out on a similar, although not identical, problem yesterday he might look to see if things are the same. In Pro*C we use a data type called a VARCHAR inside the Oracle declare section. Something like:

EXEC SQL BEGIN DECLARE SECTION;
         VARCHAR name[50];
EXEC SQL END DECLARE SECTION; When you run it through the precompiler that changes to:

struct
{
  char arr[50];
  int len;
}name;

A common problem is to forget that 'name' actually has to be referenced as 'name.arr' in C. My problem was:

    sprintf(msg, "%s\0", name);

Instead of

    sprintf(msg, "%s\0", name.arr);

Also Pro*C does NOT null terminate character strings when they are returned. A common thing to do is: name.arr[name.len] = '\0'. Your friend may not have null terminated things, although since it's an fgets() call it's probably not that. Probably more like:

    fgets(name, sizeof(name), fp);

Instead of:

    fgets(name.arr, sizeof(name.arr), fp);

Dick Goulet

____________________Reply Separator____________________
Author: "Kirsch; Walter J (Northrop Grumman)" <walter.kirsch-eds_at_eds.com>
Date:       12/13/2002 8:37 AM

>From a fellow employee of mine:

"I am in the process of upgrading from an Oracle 7.3.4 environment using Pro*C and an HP 32-bit C Compiler (version A.10.32) to an Oracle 8.1.7 64-bit environment using 64-bit Pro*C and a GNU (gcc) 64-bit C Compiler. All software is on an HP UNIX version 11.00 box.

Specifically, during runtime I am experiencing a SEGMENTATION Fault on the /usr/lib/libc.2 library when the program executes a fgets() C-statement. "

Is this obvious to the initiated? Thanks for any help.

The only thing worse in the world than being talked about is not being talked about.
-- Oscar Wilde  

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Author: Kirsch, Walter J (Northrop Grumman)
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