Identify failed file transfers during SFTP Post: 302909428

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Top Forums Shell Programming and Scripting Identify failed file transfers during SFTP Post 302909428 by Aviktheory11 on Thursday 17th of July 2014 12:17:44 AM

07-17-2014

Registered User

Quote:

Originally Posted by achenle

Why not just use scp?

Run it for each file and check the exit code, log errors as appropriate.

Hi achenle, as I've said in my first thread, using SFTP is a business requirement, and we can't help abiding by that.

Quote:

Originally Posted by rbatte1

Welcome Aviktheory11,

Your sftp session is not a normal shell session for running commands remotely so it is a little awkward. You command below

Code:

!md5sum * > chklist.md5

will run on the local server, so I'm not sure that is what you really want.

If you were using plain ftp then you would get a zero return code if the connection opened and you had to resort to switching on flags to get more verbose output that can be captured in a log file and read afterwards. sftp on the other hand is better with errors. Could you do something like the following instead?:-

Code:

#!/bin/bash
. ./params # parameter file

cd output

errcnt=0
for file in T_PROD*
do
   sftp ${FTPUSER}@${FTPSERVER} << EOF
      cd $FTPFOLDER
      put $file
        EOF
# Note not an indentation with spaces on previous line.  Used tab for clarity.
   if [ $? -ne 0 ]
   then
      printf "Something went wrong with file \"$file\"\n"
      ((errcnt=$errcnt+1))
   else
      printf "File \"$file\" send successfully.\n"
   fi
done

if [ $errcnt -ne 0 ]
then
   printf "ERROR in $errcnt transfers!\n"
done

Thanks for the help rbatte1. However, will just checking the return code of sftp ensure the correct transfer of files ? I'm dealing with file transfer things just recently [that's why I've used the md5sum, din't realise it worked only locally], and I believe the return code is 0 even if a file was transferred partially. Please correct me if I'm wrong.

I'll try out your suggestion though. Thanks a lot for the help again !!!

- Best,

Avik

Aviktheory11

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libssh2_sftp_close_handle

libssh2_sftp_close_handle(3)					  libssh2 manual				      libssh2_sftp_close_handle(3)

NAME

       libssh2_sftp_close_handle - close filehandle

SYNOPSIS

       #include <libssh2.h> #include <libssh2_sftp.h>

       int libssh2_sftp_close_handle(LIBSSH2_SFTP_HANDLE *handle);

       int libssh2_sftp_close(LIBSSH2_SFTP_HANDLE *handle);

       int libssh2_sftp_closedir(LIBSSH2_SFTP_HANDLE *handle);

DESCRIPTION

       handle - SFTP File Handle as returned by libssh2_sftp_open_ex(3) or libssh2_sftp_opendir(3) (which is a macro).

       Close  an  active  LIBSSH2_SFTP_HANDLE. Because files and directories share the same underlying storage mechanism these methods may be used
       interchangably. libssh2_sftp_close(3) and libssh2_sftp_closedir(3) are macros for libssh2_sftp_close_handle(3).

RETURN VALUE

       Return 0 on success or negative on failure.  It returns LIBSSH2_ERROR_EAGAIN when it would otherwise block. While LIBSSH2_ERROR_EAGAIN is a
       negative number, it isn't really a failure per se.

ERRORS

       LIBSSH2_ERROR_ALLOC -  An internal memory allocation call failed.

       LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.

       LIBSSH2_ERROR_SOCKET_TIMEOUT -

       LIBSSH2_ERROR_SFTP_PROTOCOL  - An invalid SFTP protocol response was received on the socket, or an SFTP operation caused an errorcode to be
       returned by the server.

SEE ALSO

       libssh2_sftp_open_ex(3)

libssh2 0.15							    1 Jun 2007					      libssh2_sftp_close_handle(3)

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