| noreturn

## Function

Removes carriage return from ASCII files

## Description

The way that Unix and PC operating systems store simple text files, (including sequence files), differs slightly.

Unix files have a hidden character called 'new line' at the end of every line.

PC files have two hidden characters called 'carriage return' and then 'new line' at the end of every line.

When files are transferred from PC machines to Unix machines, it is often useful to convert the file from the PC format to the Unix format, otherwise commands like 'more', to display the file, and text editors can become confused.

This simple utility removes 'carriage return' characters from such files, converting them from PC format to Unix format text files.

EMBOSS programs can read in both PC and Unix text file formats, so it is not necessary for you to use this utility all of the time.

## Usage

Here is a sample session with noreturn

    % noreturn ../../data/abc.dat
    Removes carriage return from ASCII files
    Output file [abc.noreturn]:

Go to the input files for this example
Go to the output files for this example

## Command line arguments

       Mandatory qualifiers:
      [-infile]            infile     (no help text) infile value
      [-outfile]           outfile    Output file name

       Optional qualifiers: (none)
       Advanced qualifiers: (none)
       Associated qualifiers:
      "-outfile" related qualifiers
       -odirectory2         string     Output directory

       General qualifiers:
       -auto                boolean    Turn off prompts
       -stdout              boolean    Write standard output
       -filter              boolean    Read standard input, write standard output
       -options             boolean    Prompt for required and optional values
       -debug               boolean    Write debug output to program.dbg
       -acdlog              boolean    Write ACD processing log to program.acdlog
       -acdpretty           boolean    Rewrite ACD file as program.acdpretty
       -acdtable            boolean    Write HTML table of options
       -verbose             boolean    Report some/full command line options
       -help                boolean    Report command line options. More
                                      information on associated and general
                                      qualifiers can be found with -help -verbose
       -warning             boolean    Report warnings
       -error               boolean    Report errors
       -fatal               boolean    Report fatal errors
       -die                 boolean    Report deaths

Mandatory qualifiers | Allowed values | Default
--- | --- | ---
[-infile] (Parameter 1) | (no help text) infile value | Input file | Required
[-outfile] (Parameter 2) | Output file name | Output file | <sequence>.noreturn
Optional qualifiers | Allowed values | Default
(none)
Advanced qualifiers | Allowed values | Default
(none)

## Input file format

The input file is a text data file with unwanted trailing carriage returns.

### Input files for usage example

### File: ../../data/abc.dat

    >ABC Test sequence with PC carriage return format
    ACDEFGHIKLMNPQRSTVWY

## Output file format

### Output files for usage example

### File: abc.noreturn

    >ABC Test sequence with PC carriage return format
    ACDEFGHIKLMNPQRSTVWY

The output file is identical to the input file, except that any trailing carriage returns have been removed. For most files this will make no difference.

## Data files

None.

## Notes

EMBOSS programs can read in both PC and Unix text file formats, so it is not necessary for you to use this utility all of the time.

## References

None.

## Warnings

None.

## Diagnostic Error Messages

None.

## Exit status

It always exits with a status of 0.

## Known bugs

None.

## See also

Program name | Description
--- | ---
biosed | Replace or delete sequence sections
cutseq | Removes a specified section from a sequence
degapseq | Removes gap characters from sequences
descseq | Alter the name or description of a sequence
entret | Reads and writes (returns) flatfile entries
extractfeat | Extract features from a sequence
extractseq | Extract regions from a sequence
listor | Writes a list file of the logical OR of two sets of sequences
maskfeat | Mask off features of a sequence
maskseq | Mask off regions of a sequence
newseq | Type in a short new sequence
notseq | Excludes a set of sequences and writes out the remaining ones
nthseq | Writes one sequence from a multiple set of sequences
pasteseq | Insert one sequence into another
revseq | Reverse and complement a sequence
seqret | Reads and writes (returns) sequences
seqretsplit | Reads and writes (returns) sequences in individual files
skipseq | Reads and writes (returns) sequences, skipping the first few
splitter | Split a sequence into (overlapping) smaller sequences
trimest | Trim poly-A tails off EST sequences
trimseq | Trim ambiguous bits off the ends of sequences
union | Reads sequence fragments and builds one sequence
vectorstrip | Strips out DNA between a pair of vector sequences
yank | Reads a sequence range, appends the full USA to a list file

## Author(s)

Alan Bleasby (ableasby © hgmp.mrc.ac.uk)
HGMP-RC, Genome Campus, Hinxton, Cambridge CB10 1SB, UK

## History

Written (1999) - Alan Bleasby

## Target users

This program is intended to be used by everyone and everything, from naive users to embedded scripts.

## Comments