Re: Reading a file in the IFS

[Scott Klement <midrange-l@xxxxxxxxxxxxxxxx>]

Hi Alan,

I don't understand the question about changing the CCSID.  What CCSID 
are you trying to change?  Typically, it converts from the CCSID of the 
file to the CCSID of the job...   You don't change the CCSID of the file 
on fopen(), instead that would be done with the CHGATR CL command or the 
setccsid QShell command.  You'd do this before opening the file.  Do you 
want to change the CCSID that your program reads into instead of using 
the job ccsid?  If so, you can use the o_ccsid option on the fopen() call.

But... changing o_ccsid won't solve the problem.

The problem is that the file contains a string of bytes that's not valid 
in UTF-8.   UTF-8 requires bytes to be encoded in a particular way, and 
you have a sequence of bytes that isn't valid by UTF-8 standards, so you 
get the error.

Perhaps the file isn't actually UTF-8?  Perhaps it's 819, or 1252, or 
something else?

If this doesn't help, please provide more information.  We need to know 
how to reproduce the problem in order to truly tell you what's 
happening.  To facilitate that, give us a sequence of bytes that we can 
place in a stream file, and then give us the exact parameters you're 
using to fopen() so we can recreate the problem.

Good Luck!


On 12/20/2021 4:34 PM, Alan Shore via MIDRANGE-L wrote:
> Hi folks
> We are on V7r3
> With the help of this group, I am using the
> '_C_IFS_fopen'
> '_C_IFS_fgets'
> '_C_IFS_fclose'
>
> For about a year now, and once I was told of what I was doing wrong, with no problems
> Until now
> I am using these functions for a new set of ifs files, and am receiving
> C_ERRNO = 3490 which translates to an error string of 'Conversion error.'
> On the _C_IFS_fopen finction
>
> I believe it MAY be the ccsid of the ifs files that I am attempting to open - CCSID =  1208
> Everything I have used these functions on up until now have been CCSID =   819 without incurring this problem'
> I have tried to googel the answer to this but having little success
> Is there anywhere in the function parameters that I can change the CCSID on the _C_IFS_fopen function?
> If anyone can point me to where the write up to these functions can be found will be greatly appreiated
>
> Alan Shore
> Solutions Architect
> IT Supply Chain Execution
>
> [NHScsignaturelogo]
>
> 60 Orville Drive
> Bohemia, NY 11716
> Phone [O] : (631) 200-5019
> Phone [C] : (631) 880-8640
> E-mail : ASHORE@xxxxxxxxxxxxxxxxxxxx
>
> 'If you're going through hell, keep going.'
> Winston Churchill