RE: sftp error in batch when no files to transfer

Thanks, Scott. I need to "quick-fix" this tonight (due to some other issues I found), but I'll look into both of your suggestions tomorrow in order to make this and another similar process more robust.
--
Sean Porterfield

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Scott Klement
Sent: Thursday, August 16, 2012 17:07
To: Midrange Systems Technical Discussion
Subject: Re: sftp error in batch when no files to transfer

Hi Sean,

I suggest using QShell to call your SFTP instead of the Qp2RunPase API.
In the Unix shell paradigm (as opposed to calling APIs) error numbers are not typically returned via 'errno'. Instead, the error message would be printed to the programs 'stderr' (standard error) data stream, and the exit status of the called program would merely return 0 for success, or a positive number for error.

In QShell, what you can do is dump all of the screen output to a log file. When the exit status is non-zero, you display the log file to get the error messages. Or, you can e-mail the log to a techie who can help troubleshoot/fix the problem.

If you truly want to call 'sftp' and get the error messages back into your RPG progam, please consider uisng my UnixCmd open source tool. It has the advantage that you can read response messages in real time (instead of writing them to a file first, and then readign the file.) It also lets you check the exit status, as well, so you can call sftp and get the messages read into your program (much like reading a file)

http://www.scottklement.com/unixcmd/


On 8/16/2012 1:18 PM, Porterfield, Sean wrote:

This may end up being an RPG question, but it starts with sftp in PASE. I have a scheduled download that runs a shell script which is just a batch sftp retrieve and delete. I put in a check in case there is an error (host not found, bad login, etc.) but apparently the shell script ends in error if there are no files to retrieve. In its current state, my program ends due to the error. Ordinarily, that's probably not a big deal. If, however, I have files that have been downloaded but not processed, they cannot get processed because the program ends after the sftp shell script.


If Qp2RunPase( SHELL_PGM
: *NULL
: *NULL
: 0
: 819
: argv
: envp ) <> 0;
// Error on sftp command
EscErrno(errno);
Else;
// Process files
endif;

This manifests as the following in my joblog:

From procedure . . . . . . : ESCERRNO

Statement . . . . . . . . . : 3042100
Message . . . . : Text not available for message CPE0000 file QCPFMSG.
Recovery . . . : Add the message description (ADDMSGD) to the message file.
If this is an inquiry message and you need to reply to it, attempt to enter
a valid reply (if you know what it is for this message ID). Otherwise, enter
*N for the system default, or delete the message and the system default will
be sent.

It's not much of a useful error message. It's exactly the same if the error is "Permission denied (publickey,password)."

Is there a way to get a more meaningful error that I can then check in the program? It might be that expect is the answer, though I am not well versed in it. Either that or just ignore the error and hope for the best, but that doesn't sound great either.
--
Sean Porterfield

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