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Full Discussion: Remove carriage return from the variable
Top Forums Shell Programming and Scripting Remove carriage return from the variable Post 302878429 by RudiC on Friday 6th of December 2013 06:03:55 AM
Old 12-06-2013
Please be careful - that trick with awk works because when converting a field to a numerical value, awk will start at the beginning of the field and scan until an unconvertible char is encountered - which is "\" "r" in post#2. Yes - it's not <CR> but two normal chars.
Code:
 a="2.80985e+09\r\r\n"
echo $a xxx
2.80985e+09\r\r\n xxx
a="2.80985e+09"$'\r'
echo $a xxx
 xxx985e+09

The second assignment really has a <CR> char in it, making echo overprint the first chars.
To remove the <CR>, you can try this bashism (pattern substitution expansion):
Code:
echo ${a/$'\r'} xxx
2.80985e+09 xxx

or e.g.
Code:
echo $a  |hd
00000000  32 2e 38 30 39 38 35 65  2b 30 39 0d 0a
echo $a |tr -d '\r' |hd
00000000  32 2e 38 30 39 38 35 65  2b 30 39 0a

 

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LEARN ABOUT DEBIAN

surfraw-update-path

SURFRAW-UPDATE-PATH(1)					User Contributed Perl Documentation				    SURFRAW-UPDATE-PATH(1)

NAME

       surfraw-update-path - updates PATH in shell config files

SYNOPSIS

       surfraw-update-path [-add] [-remove] [-check] [-sys] [-all] [-help] [-shell=SHELL]

DESCRIPTION

       surfraw-update-path adds the surfraw elvi directory (/usr/lib/surfraw) to your PATH in your shell's config file.

       Currently it supports bash, sh, csh, tcsh, ash, dash, ksh, pdksh, zsh, rc, and es

       Don't forget to login again or source your login files for it to take effect.

OPTIONS

       -check
	   Checks to see if the surfraw config code is present.  This is the default.

       -add
	   Adds the surfraw config code.

       -remove
	   Removes the surfraw config code

       -sys
	   Updates the system-wide shell config instead of the user.  Must be done as root.

       -shell=SHELL
	   Selects the shell to configure. Defaults to the value of the $SHELL environment variable.

	   Currently supported shells are:

	   sh, ash, bash, dash, csh, tcsh, ksh, pdksh, zsh, rc, and es.

       -all
	   Attempts to configure the startup files for all known shells

       -help
	   Gives a usage message

RETURN VALUE

       -check returns 0 if the surfraw code is present in the file, 1 if it is not found, or 2 on error.

       All other options return 0 on success, or 2 on error.

ENVIRONMENT

       SHELL
	   Used to determine which shell to configure, if -shell is not given.

       HOME
	   Used to find users config files.

       ENV Used by posix-compliant shells to specify a startup rc file.

       ZDOTDIR
	   Used to find user config files for zsh. If not set, defaults to HOME.

SEE ALSO

       surfraw(1), sh(1), ash(1), bash(1), dash(1), csh(1), tcsh(1), ksh(1), pdksh(1), zsh(1), rc(1), es(1)

AUTHOR

       Ian Beckwith <ianb@erislabs.net>

perl v5.12.4							    2011-07-12						    SURFRAW-UPDATE-PATH(1)
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