Talk: Uploading and Trailing M's

Does anyone else have problems with such as the one below...I assume that the
person uploaded a file and got all the trailing M's, which I know occurs with
any text file because it happens to me too.

Andy Rosulek <una...@sfa.ope.ed.gov> wrote:
>
>How about these?
>
>   \~\~~~~~~~~~\~\   |
>    \|__________\|   |        ____________
>    /           /|   |      /~          /~|
>   /           / |   or    |           | /|
>  |~~~~~U~~~~~|  |   |     |~~~~~U~~~~~|` |
>  |           | /    |     |           | /
>  |___________|/     |     |___________|/
>

Is there any way to remove the trailing ^M's instead of doing it by hand,
which is what I'm doing now?  Sometimes, if the file is long, it can be
_tremendously_ frustrating.  Any help would be appreciated.

Daniel
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Daniel Au speaking:
> Does anyone else have problems with such as the one below...I assume
> that the person uploaded a file and got all the trailing M's, which I
> know occurs with any text file because it happens to me too.

It's a consequence of an old argument about text file format.  MS-DOS
machines end lines with character 13 (CR) then character 10 (LF); UNIX
ends lines with only the LF, and other operating systems take sides.

The workstation I'm on has a program, dos2unix, that strips the
extraneous ^M's out of a text file, but if you don't have something of
that name (I think it's a Sun thing) you can use the command

  sed 's/[^ -~]$//' < filename > newfilename

(in UNIX) to do the same thing (translate DOS text from {filename} into
{newfilename}).  It would also filter out other control codes,
including such nice things as HT, BEL and ESC, but only if they
occurred at the end of a line, which they wouldn't be likely to, so
it's pretty safe.  In any case, it's the best I can do.

Peter

In article <3f01ta$im...@gagme.wwa.com>,
Daniel Au <dca...@casbah.acns.nwu.edu> wrote:
>
>Does anyone else have problems with such as the one below...I assume that the
>person uploaded a file and got all the trailing M's, which I know occurs with
>any text file because it happens to me too.
>
>Is there any way to remove the trailing ^M's instead of doing it by hand,
>which is what I'm doing now?  Sometimes, if the file is long, it can be
>_tremendously_ frustrating.  Any help would be appreciated.
>

Daniel,

I think that this is caused by a DOS<->UNIX translation.  If you do your
file transfers as text instead of binary you shouldn't have the problem.
If you have files that already contain the ^M's try using the unix2dos
or dos2unix commands to remove them.  I don't remember which you'll want
to use in this particular case.

Hope this is right and helps,
-Brett

	You can do this by creating a file containing the following line:

tr -d '^M' <file1 >file2

where ^M is actually a ctrl-M (you can create these in vi by hitting ^V
followed by ^M), file1 is the original filename, and file2 is the file to
be created. Then type, from UNIX, "source <filename--this one is the file
you created in the first place>", and file2 will be the same as file but
without the ^M's.

P.S. Sorry for the confusing instructions. My excuse: I'm tired. ;)

 ___  _                     _a' /(   <.  Simon Bradley, Knight Protector!
/ __><_>._ _ _  ___ ._ _ ~~ _}\ \(  _  ) E-mail: syb...@aber.ac.uk
\__ \| || ' ' |/ . \| ' |      \(._(.)'  Finger: syb...@osfb.aber.ac.uk
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On 11 Jan 1995, Daniel Au wrote:

> Is there any way to remove the trailing ^M's instead of doing it by hand,
> which is what I'm doing now?  Sometimes, if the file is long, it can be
> _tremendously_ frustrating.  Any help would be appreciated.

you can run the file thru the filter "col -b".
in vi, you can %s:.$::

r

Brad (syb...@aber.ac.uk) wrote:

> 	You can do this by creating a file containing the following line:

> tr -d '^M' <file1 >file2

> where ^M is actually a ctrl-M (you can create these in vi by hitting ^V
> followed by ^M), file1 is the original filename, and file2 is the file to
> be created. Then type, from UNIX, "source <filename--this one is the file
> you created in the first place>", and file2 will be the same as file but
> without the ^M's.


tr -d '\r' <file1 >file2

will do the same thing.  '\r' is the escape code for ^M, and doesnt
require any special way of entering it into an editor apart from just
typing it.


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