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Top Forums Shell Programming and Scripting Generating files of specific size Post 302077841 by blowtorch on Monday 26th of June 2006 10:19:51 PM
Old 06-26-2006
It depends on where you want to add the filename in the output file, but look at this:
Code:
#!/bin/ksh

awk -F/ '{print $1,$2,$3}' os_listing.out | while read filesize dirname filename; do
        mkdir $dirname
        cd $dirname
        echo $filename $filesize > $filename
        count=$(($filesize-${#filename}))
        dd if=/tmp/inputfile of=$filename bs=1 count=$count seek=${#filename}
        cd ..
done

This code adds the filename to the beginning of the file and then appends (count-length_of_filename) characters from the input file.
 

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BASENAME(1)						    BSD General Commands Manual 					       BASENAME(1)

NAME
basename, dirname -- return filename or directory portion of pathname SYNOPSIS
basename string [suffix] basename [-a] [-s suffix] string [...] dirname string [...] DESCRIPTION
The basename utility deletes any prefix ending with the last slash '/' character present in string (after first stripping trailing slashes), and a suffix, if given. The suffix is not stripped if it is identical to the remaining characters in string. The resulting filename is written to the standard output. A non-existent suffix is ignored. If -a is specified, then every argument is treated as a string as if basename were invoked with just one argument. If -s is specified, then the suffix is taken as its argument, and all other arguments are treated as a string. The dirname utility deletes the filename portion, beginning with the last slash '/' character to the end of string (after first stripping trailing slashes), and writes the result to the standard output. EXIT STATUS
The basename and dirname utilities exit 0 on success, and >0 if an error occurs. EXAMPLES
The following line sets the shell variable FOO to /usr/bin. FOO=`dirname /usr/bin/trail` SEE ALSO
csh(1), sh(1), basename(3), dirname(3) STANDARDS
The basename and dirname utilities are expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. BSD
April 18, 1994 BSD
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