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Top Forums UNIX for Dummies Questions & Answers PuTTY displaying "special" characters Post 302801263 by derndingle on Wednesday 1st of May 2013 04:56:05 PM
Old 05-01-2013
Thanks Corona688,

The cat -v is helpful to at least see where the nonprinting characters are in the file. It doesn't show me which character it actually is, but it is still helpful to see where they are located.

It's also useful to know that the correct term for these characters is "nonprinting characters." I wasn't even searching for the correct term... that helps.

---------- Post updated at 03:56 PM ---------- Previous update was at 03:47 PM ----------

Quote:
Originally Posted by vgersh99
convert from EBCDIC to ASCII:
Code:
dd if=your-ebcdic-file conv=ascii

Thank you for the reply vgersh99.

Unless I'm misunderstanding your reply, I don't think that will work for what I'm trying to accomplish. I don't want to actually modify the file at all, i just want to see what delimiters were used in the file (so that I can specify the correct delimiter in a bulk load statement for a db.)

They use these strange nonprinting characters as delimiters because they aren't likely to show up anywhere in the middle of a long unstructured text field.

I guess by definition if they are nonprinting characters, they won't display in the terminal window though... so I think my question has been answered.

Thanks again!
 

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mkproto(8)							    Unsupported 							mkproto(8)

Name
       mkproto - construct a prototype file system

Syntax
       /etc/mkproto special proto

Description
       The  command  is used to bootstrap a new file system.  First a new file system is created using The command is then used to copy files from
       the old file system into the new file system according to the directions found in the prototype file proto.  The  prototype  file  contains
       tokens  separated by spaces or new lines.  The first tokens comprise the specification for the root directory.  File specifications consist
       of tokens giving the mode, the user-id, the group id, and the initial contents of the file.  The syntax of the contents	field  depends	on
       the mode.

       The mode token for a file is a 6 character string.  The first character specifies the type of the file.	(The characters -bcd specify regu-
       lar, block special, character special and directory files respectively.)  The second character of the type is either u or - to specify set-
       user-id	mode or not.  The third is g or - for the set-group-id mode.  The rest of the mode is a three digit octal number giving the owner,
       group, and other read, write, execute permissions.  See

       Two decimal number tokens come after the mode; they specify the user and group ID's of the owner of the file.

       If the file is a regular file, the next token is a pathname whence the contents and size are copied.

       If the file is a block or character special file, two decimal number tokens follow which give the major and minor device numbers.

       If the file is a directory, makes the entries .	and ..	and then reads a list of names	and  (recursively)  file  specifications  for  the
       entries in the directory.  The scan is terminated with the token $.

       A sample prototype specification follows:

       d--777 3 1
       usr  d--777 3 1
	    sh	 ---755 3 1 /bin/sh
	    ken  d--755 6 1
		 $
	    b0	 b--644 3 1 0 0
	    c0	 c--644 3 1 0 0
	    $
       $

Restrictions
       You can only run on virgin file systems.  It should be possible to copy files into existent file systems.

See Also
       dir(5), fs(5), fsck(8), newfs(8)

																	mkproto(8)
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