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Full Discussion: Check to see if a file is generating
Top Forums Shell Programming and Scripting Check to see if a file is generating Post 302937994 by rbatte1 on Wednesday 11th of March 2015 08:37:45 AM
Old 03-11-2015
The easiest way to know that a file is complete is to also write a marker file, so if you are sending it with ftp or similar, you would do the following on the sending:-
Code:
cd $target_dir
put $file
put /dev/null $file.OK

On the receiving server, you write you script to look for $file.OK and then you know you have the file.

Of course, you should put an error check after you think you have sent the data file before writing the flag file else the receiving server will just grab it.

If you want to use a checksum, you could use this as content to the flag file, assuming that the sender and the receiver are using the same check-sum algorithm, i.e. the output from sum is very different to cksum and it depends what each side has.

So, on the sender, something like:-
Code:
cksum $file >$file.OK
ftp ......... # whatever you usually put here
   cd
   put $file
   put $file.OK
   quit

And on the receiver:-
Code:
cksum $file > $file.cksum
diff -q $file.OK $file.ckcum
if [ $? -ne 0 ]
then
   echo "Transfer error"
   exit
fi

Of course you could use the m5sum functions to make this neater if you wish with:-
Code:
md5sum $file>$file.OK
ftp .......etc.

...and...
Code:
if [ ! -z "`md5sum --quiet -c $file.OK 2>&1`" ]
then
   echo "Transfer error"
fi


Does this logic help?



Robin
This User Gave Thanks to rbatte1 For This Post:
twinion
 

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LEARN ABOUT CENTOS

locale::codes::langfam

Locale::Codes::LangFam(3)				User Contributed Perl Documentation				 Locale::Codes::LangFam(3)

NAME

       Locale::Codes::LangFam - standard codes for language extension identification

SYNOPSIS

	  use Locale::Codes::LangFam;

	  $lext = code2langfam('apa');		       # $lext gets 'Apache languages'
	  $code = langfam2code('Apache languages');    # $code gets 'apa'

	  @codes   = all_langfam_codes();
	  @names   = all_langfam_names();

DESCRIPTION

       The "Locale::Codes::LangFam" module provides access to standard codes used for identifying language families, such as those as defined in
       ISO 639-5.

       Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default ISO 639-5
       language family codes will be used.

SUPPORTED CODE SETS

       There are several different code sets you can use for identifying language families. A code set may be specified using either a name, or a
       constant that is automatically exported by this module.

       For example, the two are equivalent:

	  $lext = code2langfam('apa','alpha');
	  $lext = code2langfam('apa',LOCALE_LANGFAM_ALPHA);

       The codesets currently supported are:

       alpha
	   This is the set of three-letter (lowercase) codes from ISO 639-5 such as 'apa' for Apache languages.

	   This is the default code set.

ROUTINES

       code2langfam ( CODE [,CODESET] )
       langfam2code ( NAME [,CODESET] )
       langfam_code2code ( CODE ,CODESET ,CODESET2 )
       all_langfam_codes ( [CODESET] )
       all_langfam_names ( [CODESET] )
       Locale::Codes::LangFam::rename_langfam  ( CODE ,NEW_NAME [,CODESET] )
       Locale::Codes::LangFam::add_langfam  ( CODE ,NAME [,CODESET] )
       Locale::Codes::LangFam::delete_langfam  ( CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_alias  ( NAME ,NEW_NAME )
       Locale::Codes::LangFam::delete_langfam_alias  ( NAME )
       Locale::Codes::LangFam::rename_langfam_code  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::add_langfam_code_alias  ( CODE ,NEW_CODE [,CODESET] )
       Locale::Codes::LangFam::delete_langfam_code_alias  ( CODE [,CODESET] )
	   These routines are all documented in the Locale::Codes::API man page.

SEE ALSO

       Locale::Codes
	   The Locale-Codes distribution.

       Locale::Codes::API
	   The list of functions supported by this module.

       http://www.loc.gov/standards/iso639-5/id.php
	   ISO 639-5 .

AUTHOR

       See Locale::Codes for full author history.

       Currently maintained by Sullivan Beck (sbeck@cpan.org).

COPYRIGHT

	  Copyright (c) 2011-2013 Sullivan Beck

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.16.3							    2013-02-27						 Locale::Codes::LangFam(3)
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