| noreturn

## Function

Remove carriage return from ASCII files

## Description

noreturn reads an input file of plain text containing unwanted carriage returns on the end of lines, and writes an output file which is identical to the input file, except that any trailing carriage returns are removed.

## Usage

Here is a sample session with noreturn

    % noreturn abc.dat
    Remove carriage return from ASCII files
    ASCII text output file [abc.noreturn]:

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

## Command line arguments

       Standard (Mandatory) qualifiers:
      [-infile]            infile     ASCII text file
      [-outfile]           outfile    [*.noreturn] ASCII text output file

       Additional (Optional) qualifiers: (none)
       Advanced (Unprompted) qualifiers:
       -system             menu       [unix] Target operating system for
                                      end-of-line format (Values: unix (Unix/Linux
                                      systems); pc (Windows/DOS); mac (Apple
                                      Macintosh))

       Associated qualifiers:

       "-outfile" associated qualifiers
       -odirectory2        string     Output directory

       General qualifiers:
       -auto               boolean    Turn off prompts
       -stdout             boolean    Write first file to standard output
       -filter             boolean    Read first file from standard input, write
                                      first file to standard output
       -options            boolean    Prompt for standard and additional values
       -debug              boolean    Write debug output to program.dbg
       -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 dying program messages

Standard (Mandatory) qualifiers | Allowed values | Default
--- | --- | ---
[-infile] (Parameter 1) | ASCII text file | Input file | Required
[-outfile] (Parameter 2) | ASCII text output file | Output file | <*>.noreturn
Additional (Optional) qualifiers | Allowed values | Default
(none)
Advanced (Unprompted) qualifiers | Allowed values | Default

-system

Target operating system for end-of-line format

unix | (Unix/Linux systems)
pc | (Windows/DOS)
mac | (Apple Macintosh)

unix

## Input file format

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

### Input files for usage example

### File: 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

Unix and PC operating systems store plain text files (which includes sequence files) slightly differently. Unix files have a hidden character called 'new line' at the end of every line whereas PC files have a 'new line' and a 'carriage return' at the end of every line. When files are transferred from a PC to a Unix machines, it is often useful to convert the file from the PC format to the Unix format, otherwise commands (such as 'more') and programs (such as text editors) that display the file can become confused. noreturn 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.

## 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
--- | ---
aligncopy | Reads and writes alignments
aligncopypair | Reads and writes pairs from alignments
biosed | Replace or delete sequence sections
codcopy | Copy and reformat a codon usage table
cutseq | Removes a section from a sequence
degapseq | Removes non-alphabetic (e.g. gap) characters from sequences
descseq | Alter the name or description of a sequence
entret | Retrieves sequence entries from flatfile databases and files
extractalign | Extract regions from a sequence alignment
extractfeat | Extract features from sequence(s)
extractseq | Extract regions from a sequence
featcopy | Reads and writes a feature table
featreport | Reads and writes a feature table
listor | Write a list file of the logical OR of two sets of sequences
makenucseq | Create random nucleotide sequences
makeprotseq | Create random protein sequences
maskambignuc | Masks all ambiguity characters in nucleotide sequences with N
maskambigprot | Masks all ambiguity characters in protein sequences with X
maskfeat | Write a sequence with masked features
maskseq | Write a sequence with masked regions
newseq | Create a sequence file from a typed-in sequence
nohtml | Remove mark-up (e.g. HTML tags) from an ASCII text file
nospace | Remove all whitespace from an ASCII text file
notab | Replace tabs with spaces in an ASCII text file
notseq | Write to file a subset of an input stream of sequences
nthseq | Write to file a single sequence from an input stream of sequences
pasteseq | Insert one sequence into another
revseq | Reverse and complement a nucleotide sequence
seqret | Reads and writes (returns) sequences
seqretsplit | Reads sequences and writes them to individual files
sizeseq | Sort sequences by size
skipredundant | Remove redundant sequences from an input set
skipseq | Reads and writes (returns) sequences, skipping first few
splitter | Split sequence(s) into smaller sequences
trimest | Remove poly-A tails from nucleotide sequences
trimseq | Remove unwanted characters from start and end of sequence(s)
trimspace | Remove extra whitespace from an ASCII text file
union | Concatenate multiple sequences into a single sequence
vectorstrip | Removes vectors from the ends of nucleotide sequence(s)
yank | Add a sequence reference (a full USA) to a list file

## Author(s)

Alan Bleasby (ajb © ebi.ac.uk)
European Bioinformatics Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, 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

None