Solved

ASCII to EBCDIC - DD command

Posted on 2006-07-24
9
3,915 Views
Last Modified: 2013-12-06
I'm using the DD command in UNIX to convert ASCII to EBCDIC so that I can print via "lp" to a AS/400 attached printer.  I'm using the AS/400 as a print server.  The command below works fine except that the carriage return/line feed disappear.  The file prints without the carriage return line feed.

Here is the unix command:
cat $file | dd ibs=80 cbs=132 conv=ebcdic | lp -d AS400PRNT -s

Not that it should matter, but I'm running this under HPUX.
0
Comment
Question by:javajws
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
9 Comments
 
LVL 57

Expert Comment

by:giltjr
ID: 17172918
have you tried:

    dd if=$file ibs=80 cbs=132 conv=ebcdic | lp -d AS400PRNT -s
   

Does the file have CRLF in it?  Normally on UNIX records are terminated by LF only.
0
 
LVL 9

Author Comment

by:javajws
ID: 17175492
Using the IF parameter does help with the CRLF but the length of the file is 132 instead of 80.  I'm guessing this is because of using the CBS of 132.  When I use a CBS of 80, the CRLF disappears again.

I also tried using the "iconv" UNIX command to convert from ascii to ebcdic:
iconv -f roma8 -t cp037 $file | lp -d AS400PRNT -s

and I get the same results.  No carriage return/line feed.
0
 
LVL 57

Expert Comment

by:giltjr
ID: 17175849
What happens if you use cbs=82?

Is each line in the file actually 80 bytes long?
0
Get 15 Days FREE Full-Featured Trial

Benefit from a mission critical IT monitoring with Monitis Premium or get it FREE for your entry level monitoring needs.
-Over 200,000 users
-More than 300,000 websites monitored
-Used in 197 countries
-Recommended by 98% of users

 
LVL 9

Author Comment

by:javajws
ID: 17176169
It still prints landscape and the CRLFs are not correct.
0
 
LVL 57

Expert Comment

by:giltjr
ID: 17176471
Does the input file contain CRLF to start with?
0
 
LVL 57

Accepted Solution

by:
giltjr earned 500 total points
ID: 17176494
O.K. try

  dd if=$file ibs=80 cbs=132 conv=ebcdic ofs=printit
   lp -d AS400PRNT -s printit
0
 
LVL 57

Expert Comment

by:giltjr
ID: 17176622
I did a couple of quick tests.  The dd command does not add CRLF, so if the original file does not have them in there, they won't be afterwards.  They must exist before hand.

Also, the ibs and cbs are not LRECL's, but "blocksize", which is the number of bytes that will be read and then converted at a time.  This does not make the dd command treat the input as if it was 80 byte records and write 132 byte records.
0
 
LVL 14

Expert Comment

by:chris_calabrese
ID: 17185318
As giltjr stated above, Unix files usually have only LF and not CR. Most Unixen have a 'unix2dos' or (for HP-UX) 'ux2dos' command to add the CR.

That would get you
  unix2dos < file | dd ... | lp ...

If your system doesn't have this command you can also write it pretty trivially in awk, sed, perl, whatever. Here is a version in awk
   awk '{ printf "%s\r\n", $0; }'
0
 
LVL 6

Expert Comment

by:JJSmith
ID: 17188524

Have you tried 'conv=ibm' in you dd command.

IBM use a varient of ebcdic !! AS/400 is IBM tech stack - just a thought

Cheers
JJ
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Java performance on Solaris - Managing CPUs There are various resource controls in operating system which directly/indirectly influence the performance of application. one of the most important resource controls is "CPU".   In a multithreaded…
FreeBSD on EC2 FreeBSD (https://www.freebsd.org) is a robust Unix-like operating system that has been around for many years. FreeBSD is available on Amazon EC2 through Amazon Machine Images (AMIs) provided by FreeBSD developer and security office…
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.

724 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question