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Full Discussion: Renaming files by appending string from within file to filename
Top Forums UNIX for Beginners Questions & Answers Renaming files by appending string from within file to filename Post 303030600 by Scrutinizer on Wednesday 13th of February 2019 12:22:25 AM
Old 02-13-2019
Hi, try something like this:
Code:
for file in filename*                                  # For every file in the current directory that starts with "filename"
do
  if [ -r "$file" ]; then                              # Check if the file is readable
    IFS='~' read x x x x x x x x string x < "$file"    # Read the 9th field of the first line of the file into variable string and close
    if [ "$string" ]; then                             # Check if the string is not empty
      mv -- "$file" "${file}_${string}"                # Rename the file 
    fi 
  fi
done

you can put an echo statement before the mv command first to see what it does



--
If you are using bash , you can also read the fields of the first line into an array:
Code:
IFS='~' read -a string <"$file"

and then use ${string[8]} for the ninth field.
Last edited by Scrutinizer; 02-13-2019 at 01:30 AM..
These 3 Users Gave Thanks to Scrutinizer For This Post:
HLee1981 Neo nezabudka
 

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LEARN ABOUT DEBIAN

rename

rename(3tcl)						       Tcl Built-In Commands						      rename(3tcl)

__________________________________________________________________________________________________________________________________________________

NAME

       rename - Rename or delete a command

SYNOPSIS

       rename oldName newName
_________________________________________________________________

DESCRIPTION

       Rename the command that used to be called oldName so that it is now called newName.  If newName is an empty string then oldName is deleted.
       oldName and newName may include namespace qualifiers (names of containing namespaces).  If a command is renamed into a different namespace,
       future invocations of it will execute in the new namespace.  The rename command returns an empty string as result.

EXAMPLE

       The  rename command can be used to wrap the standard Tcl commands with your own monitoring machinery.  For example, you might wish to count
       how often the source command is called:
	      rename ::source ::theRealSource
	      set sourceCount 0
	      proc ::source args {
		  global sourceCount
		  puts "called source for the [incr sourceCount]'th time"
		  uplevel 1 ::theRealSource $args
	      }

SEE ALSO

       namespace(3tcl), proc(3tcl)

KEYWORDS

       command, delete, namespace, rename

Tcl																      rename(3tcl)
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