Re: In Perl, how to check for the remote folder existence using sftp command? Cant use Net:SFTP

Hi Yedu,

At least on my system, the "Couldn't canonicalise: ..." message gets printed to sftp's stderr stream, which the backticks you're using to run the command don't capture, and the sftp command itself exits normally after the "bye", which is why you're not seeing an error in $?.

My suggestion would be to switch to a module that is capable of capturing stderr when running the external command. My personal favorites are IPC::Run3 and Capture::Tiny. There's also the core module IPC::Cmd, which I don't have experience with.

The "not so nice" solution is to have the shell merge the command's stdout and stderr streams by inserting " 2>&1" just before " <<EOF". Then you should be able to inspect $sftp_log for the error message with a regular expression.

Hope this helps,
-- Hauke D

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Re^2: In Perl, how to check for the remote folder existence using sftp command? Cant use Net:SFTP by Yedu (Acolyte) on May 25, 2016 at 15:12 UTC
When I tried to use these modules IPC::Run3 and Capture::Tiny I am getting error like Can't locate IPC/Run3.pm and Can't locate Capture/Tiny.pm respectively. Does that mean, the modules are need to be installed? Please help.	[reply]
Re^3: In Perl, how to check for the remote folder existence using sftp command? Cant use Net:SFTP by hippo (Bishop) on May 25, 2016 at 15:21 UTC
Yes, the modules need to be installed - you cannot use a module which isn't installed. See A Guide to Installing Modules.	[reply]
Re^4: In Perl, how to check for the remote folder existence using sftp command? Cant use Net:SFTP by Yedu (Acolyte) on May 25, 2016 at 15:31 UTC
So, is it impossible without installing any of these modules? or Is there a way to handle this situation like in shell script? Thanks...	[reply]
Re^5: In Perl, how to check for the remote folder existence using sftp command? Cant use Net:SFTP by haukex (Archbishop) on May 25, 2016 at 15:48 UTC
Re^3: In Perl, how to check for the remote folder existence using sftp command? Cant use Net:SFTP by stevieb (Canon) on May 25, 2016 at 15:21 UTC
Yes, it means they need to be installed.	[reply]


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