Shell Programming and Scripting

#!/usr/bin/env ksh

# read table and generate find commands
# {Y|N} | filesystem | filelist
# provide filename of table as standard input e.g.  test_script <table_name
# put rm on the command line as the first parameter to actually 
# generate commands that delete files e.g. test_script rm <table_name
# if rm is not put on the command line, the default is to list what would be scratched.

awk -F "|" -v cmd="${1:-ls -l}" '
        {
                if( $1 == "Y" || $1 == "y" )            # if no-decend, add prune logic that skips directories

                        no_depth = sprintf( "\\( ! -name \".\"  -type d -prune \\) -o" );
                else
                        no_depth = "";     # ok to examine directories -- nothing extra needed


                printf( "(cd %s; find . %s ", $2, no_depth );   # output first part of cmd

                gsub( ",", " ", $3 );                # allow for pattern,pattern or pattern patern in the list
                n = split( $3, a, " " );            # process each filename pattern
                for( x = 1; x <= n; x++ )

                        printf( "-name \"%s\"  -mtime +300", a[x] );   # add to command

                printf( " -print | xargs %s)\n", cmd );   # finish the command
        }
' | ksh           # finally pipe to ksh to execute the commands

awk -F "|" -v cmd="${1:-ls -l no-such-file 2>/dev/null}" '