how to hide error messages from sub-process

[Jason]

In my code I’m doing the following to identify is a file exists (on a Mac)

 IF OS-IDENTIFIED = "MACOS"
            MOVE "ls /usr/local/bin/chromedriver > bot.check"
             TO SYSTEM-COMMAND
           END-IF.
           ...
           ...
 CALL "SYSTEM" USING SYSTEM-COMMAND.

Then I read the bot.check file to determine if the file chromedriver was found.

This works fine.

But when I exit the program (back to the OS) I see the error message resulting from the ls command when the file was not found:

ls: /usr/local/bin/chromedriver: No such file or directory

Anyway I can prevent that? It’s not a major issue but I’d prefer to return to an error message free screen when existing the program.

[Simon Sobisch]

Add 2>/dev/null to your command for CALL 'SYSTEM'- and even better :use CALL 'CBL_CHECK_FILE_EXIST' in the first place.

[Jason]

the what now? I didn't know about CBL_CHECK_FILE_EXIST. Thank you!

[Simon Sobisch]

It is very likely that the Programmer's Guide has it...
For a list of the system routines available with GnuCOBOL have a look at the manual (shipped PDF and info page) or at cobc --list-system.