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Top Forums Shell Programming and Scripting Validating the size of file transferred from ftp server to the local system Post 302511552 by jpundalik on Thursday 7th of April 2011 05:02:53 AM
Old 04-07-2011
Validating the size of file transferred from ftp server to the local system

Validating the size of file transferred from ftp server to the local system.

File type: Text file/Flat file
Source System: Windows / Unix Systems
Target System is always: Unix
Mode of Transfer : ASCII

We have generic ftp shell script that transfers the files from different ftp servers.

Some time files are only getting transferred partially & doesn't show any errors.
An example scenario is given below.
Example Scenario:
Souce System: Unix
Source File's size: 4000 Kbytes.
Target System: Unix
Target File size: 2000 K bytes.
Reason for the difference in File size: As the target unix system is not having enough space, & the FTP utility doesn't treat this kind of scenario as an error, the final outcome of the script was successful.

We would like to handle this scenario with the addition of the logic to check the file sizes of the source & target system and decide the final outcome of the script. Please provide your thoughts/suggestions.

Options Tried:
We also tried one of the option that ftp log itself is capturing the file size while transferring. This size is not matching with actual file size got transferred to the local system due to difference in the OS of source and destination.
 

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ncftpls(1)						      General Commands Manual							ncftpls(1)

NAME
ncftpls - Internet file transfer program for scripts SYNOPSIS
ncftpls [options] ftp://url.style/host/path/name/ OPTIONS
Command line flags: -1 Most basic format, one item per line. -l Long list format. -R Long list format, recurse subdirectories. Equivalent to "-x -lR". -x -XX Additional ls flags to pass on to the server. -u XX Use username XX instead of anonymous. -p XX Use password XX with the username. -P XX Use port number XX instead of the default FTP service port (21). -d XX Use the file XX for debug logging. -t XX Timeout after XX seconds. -E Use regular (PORT) data connections. -F Use passive (PASV) data connections. The default is to use passive, but to fallback to regular if the passive connection fails or times out. -r XX Redial a maximum of XX times until connected to the remote FTP server. -W XX Send raw FTP command XX after logging in. -X XX Send raw FTP command XX after each file transferred. -Y XX Send raw FTP command XX before logging out. The -W, -X, and -Y options are useful for advanced users who need to tweak behavior on some servers. For example, users accessing mainframes might need to send some special SITE commands to set blocksize and record format information. For these options, you can use them multiple times each if you need to send multiple commands. For the -X option, you can use the cookie %s to expand into the name of the file that was transferred. DESCRIPTION
The purpose of ncftpls is to do remote directory listings using the File Transfer Protocol without entering an interactive shell. This lets you write shell scripts or other unattended processes that can do FTP. The default behavior is to print the directory listing in columnized format (i.e. ls -CF), but that is not very useful for scripting. This example uses the -1 flag, to print one file per line: $ ncftpls -1 ftp://ftp.ncftp.com/pub/ncftp/ You can also do a remote "ls -l", by using "ncftpls -l". If you want to try other flags, you have to use them with the -x flag. For exam- ple, if you wanted to do a remote "ls -lrt", you could do this: $ ncftpls -x "-lrt" ftp://ftp.ncftp.com/pub/ncftp/ By default the program tries to open the remote host and login anonymously, but you can specify a username and password information like you can with ncftpget or ncftpput. DIAGNOSTICS
ncftpls returns the following exit values: 0 Success. 1 Could not connect to remote host. 2 Could not connect to remote host - timed out. 3 Transfer failed. 4 Transfer failed - timed out. 5 Directory change failed. 6 Directory change failed - timed out. 7 Malformed URL. 8 Usage error. 9 Error in login configuration file. 10 Library initialization failed. 11 Session initialization failed. AUTHOR
Mike Gleason, NcFTP Software (mgleason@ncftp.com). SEE ALSO
ncftpput(1), ncftpget(1), ncftp(1), ftp(1), rcp(1), tftp(1). LibNcFTP (http://www.ncftp.com/libncftp/). Software NcFTP ncftpls(1)
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