nocrs.md

nocrs

Purpose

Remove carriage returns from files. This is especially useful for files created on Windoze that have carriage returns - one of the worst things about Windoze, in my opinion.

Syntax

Syntax: nocrs [-v] file ...

Options and arguments

Option	Description	Default
-v, --verbose	Increase debugging messages. More instance of this option produce more debugging.	Debugging is not enabled

Arguments

Each file to process is specified as an argument on the command line.

Example

$ echo -e 'This is a test\r' > test
$ od -ctx1 test
0000000   T   h   i   s       i   s       a       t   e   s   t  \r  \n
         54  68  69  73  20  69  73  20  61  20  74  65  73  74  0d  0a
0000020
$ nocrs test
test
$ od -ctx1 test
0000000   T   h   i   s       i   s       a       t   e   s   t  \n
         54  68  69  73  20  69  73  20  61  20  74  65  73  74  0a
0000017
$

$ echo -e 'This is a test\r' > test
$ nocrs -v test
2019-02-17 10:23:56,404 INFO /home/mrbruno/bin/nocrs:45 processing test
2019-02-17 10:23:56,404 INFO /home/mrbruno/bin/nocrs:25 Backing up 'test' to '.test-20190217102356'
test
$

Notes

• The script writes to the original files when carriage returns are present.

• The script backups up the original file (see the example) using cp -pv to preverse the file in case there are issues

• If a file does not contain carriage returns, there are no changes and the file is not backed up.

• A great example of using this tool is Python scripts. Python on Unix will not be able to process the script!

  $ cat test.py
  #! /usr/bin/env python
  print "Hello, Python world"
  $ od -ctx1 test.py
  0000000   #   !       /   u   s   r   /   b   i   n   /   e   n   v
           23  21  20  2f  75  73  72  2f  62  69  6e  2f  65  6e  76  20
  0000020   p   y   t   h   o   n  \r  \n   p   r   i   n   t       "   H
           70  79  74  68  6f  6e  0d  0a  70  72  69  6e  74  20  22  48
  0000040   e   l   l   o   ,       P   y   t   h   o   n       w   o   r
           65  6c  6c  6f  2c  20  50  79  74  68  6f  6e  20  77  6f  72
  0000060   l   d   "  \r  \n
           6c  64  22  0d  0a
  0000065
  $ chmod +x test.py
  $ ./test.py
  /usr/bin/env: ‘python\r’: No such file or directory
  $ python test.py
  Hello, Python world
  $