Re: [Ssh-sftp-perl-users] Timeout when executing scripts with Net::SSH::Perl by mod_perl

[Thierry C. <thi...@gm...>]

Not sure it could work, but perhaps you should try to set interactive to false  ?


Le 22 oct. 2010 à 12:37, uptest <up...@ao...> a écrit :

> 
> Dear all,
> 
> I have a problem when executing scripts with Net::SSH::Perl by mod_perl.
> When executing the script via mod_perl the ssh connection will be opened,  
> the $cmd executed but the output is never returned to the caller. It hangs  
> until a timeout occur. Nothing will be sent to the web browser.
> 
> If I execute the script locally it works fine.
> 
> The sample script just opens a ssh connection to the localhost:
> my $ssh = Net::SSH::Perl->new($host,%params);
> $ssh->login($user, $pass);
> my($stdout, $stderr, $exit) = $ssh->cmd($cmd);
> print "STDOUT=$stdout\n";
> print "STDERR=$stderr\n";
> print "EXIT=$exit\n";
> 
> See below the debug output when executed first by mod_perl then by a local  
> shell:
> 
> 
> Debug output when executed via mod_perl:
> from /var/log/httpd/error.log
> 
> anyhost: Reading configuration data /.ssh/config
> anyhost: Reading configuration data /etc/ssh_config
> anyhost: Connecting to localhost, port 22.
> anyhost: Remote protocol version 2.0, remote software version OpenSSH_5.0
> anyhost: Net::SSH::Perl Version 1.34, protocol version 2.0.
> anyhost: No compat match: OpenSSH_5.0.
> anyhost: Connection established.
> anyhost: Sent key-exchange init (KEXINIT), wait response.
> anyhost: Algorithms, c->s: 3des-cbc hmac-sha1 none
> anyhost: Algorithms, s->c: 3des-cbc hmac-sha1 none
> anyhost: Entering Diffie-Hellman Group 1 key exchange.
> anyhost: Sent DH public key, waiting for reply.
> anyhost: Received host key, type 'ssh-dss'.
> anyhost: Host 'localhost' is known and matches the host key.
> anyhost: Computing shared secret key.
> anyhost: Verifying server signature.
> anyhost: Waiting for NEWKEYS message.
> anyhost: Send NEWKEYS.
> anyhost: Enabling encryption/MAC/compression.
> anyhost: Sending request for user-authentication service.
> anyhost: Service accepted: ssh-userauth.
> anyhost: Trying empty user-authentication request.
> anyhost: Authentication methods that can continue:  
> publickey,gssapi-with-mic,password.
> anyhost: Next method to try is publickey.
> anyhost: Next method to try is password.
> anyhost: Trying password authentication.
> anyhost: Login completed, opening dummy shell channel.
> anyhost: channel 0: new [client-session]
> anyhost: Requesting channel_open for channel 0.
> anyhost: channel 0: open confirm rwindow 0 rmax 32768
> anyhost: Got channel open confirmation, requesting shell.
> anyhost: Requesting service shell on channel 0.
> anyhost: channel 1: new [client-session]
> anyhost: Requesting channel_open for channel 1.
> anyhost: Entering interactive session.
> anyhost: Sending command: ls -ltr
> anyhost: Sending command: ls -ltr
> anyhost: Requesting service exec on channel 1.
> anyhost: channel 1: open confirm rwindow 0 rmax 32768
> anyhost: input_channel_request: rtype exit-status reply 0
> anyhost: channel 1: rcvd eof
> anyhost: channel 1: output open -> drain
> anyhost: channel 1: rcvd close
> anyhost: channel 1: input open -> closed
> anyhost: channel 1: close_read
> 
> ------------------------------------------------------------------
> 
> Started from the local shell:
> 
> anyhost: Reading configuration data /root/.ssh/config
> anyhost: Reading configuration data /etc/ssh_config
> anyhost: Allocated local port 1023.
> anyhost: Connecting to localhost, port 22.
> anyhost: Remote protocol version 2.0, remote software version OpenSSH_5.0
> anyhost: Net::SSH::Perl Version 1.34, protocol version 2.0.
> anyhost: No compat match: OpenSSH_5.0.
> anyhost: Connection established.
> anyhost: Sent key-exchange init (KEXINIT), wait response.
> anyhost: Algorithms, c->s: 3des-cbc hmac-sha1 none
> anyhost: Algorithms, s->c: 3des-cbc hmac-sha1 none
> anyhost: Entering Diffie-Hellman Group 1 key exchange.
> anyhost: Sent DH public key, waiting for reply.
> anyhost: Received host key, type 'ssh-dss'.
> anyhost: Host 'localhost' is known and matches the host key.
> anyhost: Computing shared secret key.
> anyhost: Verifying server signature.
> anyhost: Waiting for NEWKEYS message.
> anyhost: Send NEWKEYS.
> anyhost: Enabling encryption/MAC/compression.
> anyhost: Sending request for user-authentication service.
> anyhost: Service accepted: ssh-userauth.
> anyhost: Trying empty user-authentication request.
> anyhost: Authentication methods that can continue:  
> publickey,gssapi-with-mic,password.
> anyhost: Next method to try is publickey.
> anyhost: Next method to try is password.
> anyhost: Trying password authentication.
> anyhost: Login completed, opening dummy shell channel.
> anyhost: channel 0: new [client-session]
> anyhost: Requesting channel_open for channel 0.
> anyhost: channel 0: open confirm rwindow 0 rmax 32768
> anyhost: Got channel open confirmation, requesting shell.
> anyhost: Requesting service shell on channel 0.
> anyhost: channel 1: new [client-session]
> anyhost: Requesting channel_open for channel 1.
> anyhost: Entering interactive session.
> anyhost: Sending command: ls -ltr
> anyhost: Sending command: ls -ltr
> anyhost: Requesting service exec on channel 1.
> anyhost: channel 1: open confirm rwindow 0 rmax 32768
> anyhost: input_channel_request: rtype exit-status reply 0
> anyhost: channel 1: rcvd eof
> anyhost: channel 1: output open -> drain
> anyhost: channel 1: rcvd close
> anyhost: channel 1: input open -> closed
> anyhost: channel 1: close_read
> anyhost: channel 1: obuf empty
> anyhost: channel 1: output drain -> closed
> anyhost: channel 1: close_write
> anyhost: channel 1: send close
> anyhost: channel 1: full closed
> STDOUT=total 12156
> -rw-------  1 root root     2022 Aug 13  2008 anaconda-ks.cfg
> drwxr-xr-x  2 root root     4096 Aug 14  2008 Desktop
> drwxr-xr-x  3 root root     4096 Sep  2  2008 workspace
> drwxr-xr-x  4 root root     4096 Oct 21  2008 SDC
> -rw-r--r--  1 root root     1030 Feb 27  2009 connections.txt
> -rw-r--r--  1 root root    86363 Aug  3  2009 SDABeans.jar
> -rw-r--r--  1 root root  1687590 Aug  3  2009 SDAWeb.war
> -rw-r--r--  1 root root      184 Nov 11  2009 TODO
> drwxr-xr-x  8 root root     4096 Nov 12  2009 backup
> -rw-r--r--  1 root root 10416040 Nov 12  2009 OSSmigrate121109.gz
> -rw-r--r--  1 root root      922 Nov 13  2009 svnAdmin.info
> drwxr-xr-x  4 root root     4096 May 11 17:14 tmp
> drwxr-xr-x  2 root root     4096 Jul 13 09:19 sh
> drwxr-xr-x  8 root root     4096 Aug 11 12:35 cpan
> drwxr-xr-x  7 root root     4096 Aug 11 13:05 BPM
> -rw-------  1 root root   139999 Aug 23 10:05 mbox
> drwxr-xr-x  7 root root     4096 Oct 14 14:42 Downloads
> 
> Use of uninitialized value $stderr in concatenation (.) or string at  
> ./local.pl line 20.
> STDERR=
> EXIT=0
> END!!!!!!!!
> 
> 
> Thanks in advance for any help.
> Bye
> Uwe
> 
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