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Full Discussion: How to insert numbers to a in between statement
Top Forums Shell Programming and Scripting How to insert numbers to a in between statement Post 302532055 by alister on Sunday 19th of June 2011 03:12:53 PM
Old 06-19-2011
Quote:
Originally Posted by pinpe
Code:
sed -e 's/\(.*\)\(.\)/website \1\.\2\.numbers.com/' -e '1i #\!/bin/bash \n' a
sed: command garbled: 1i #!/bin/bash \n

Quote:
Originally Posted by guruprasadpr
Not sure why you are getting the error. Not able to reproduce the error in which ever shell I tried
A few candidates to consider:

1. The dot in replacement text is not special. You do not need to backslash-escape it in that context. Backslash-escaping non-special characters yields undefined sequences which can cause problems with some implementations (and opens the door to the remote possibility that a future extension to the standard will break current sed scripts).

2. The insert (i) command should be followed by backslash and newline, before the text to insert. (GNU sed supports text immediately after the command name but this is not portable.)

3. In a strictly compliant implementation, the \n escape sequence is only allowed in a regular expression evaluated against the pattern space. It is not allowed in replacement text nor in addresses. As with the \. sequence mentioned above, \n in in those contexts yields an undefined sequence (GNU sed will probably emit a newline). However, within the text argument to the insert (i) and append (a) commands, backslashes are stripped and the following character treated literally. \! becomes ! and \n becomes n (GNU sed instead chooses to emit a newline).

GNU sed developers may call these extensions, but they're more like incompatible deviations. Just a little one-liner and look at all the potential gotchas. What a headache!

Regards,
Alister
Last edited by alister; 06-19-2011 at 04:19 PM..
 

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LEARN ABOUT DEBIAN

colorgccrc

COLORGCCRC(5)							File Formats Manual						     COLORGCCRC(5)

NAME

       colorgccrc - configuration file for colorgcc

DESCRIPTION

       A colorgccrc configuration file is used to configure the highlighting of the compiler output from colorgcc.

SYNTAX

       Each  line  consists  of  a  keyword  designating  a configuration variable.  The keyword is followed by `:' and then one or several values
       (depending on the keyword).  Lines beginning with a hash mark `#' are comments.

CONFIGURATION VARIABLES

       g++ | gcc | c++ | cc | g77 | gcj | gnat | gpc
	      Specifies the paths to the compilers.  Takes one value; a path to the compiler.

       nocolor
	      Specifies what terminal types colorization should be disabled on.  Takes one or several values, separated by whitespace.

       srcColor
	      Specifies the highlighting attributes source-code should be given.  Takes one or several color attributes.  See  the  section  COLOR
	      ATTRIBUTES for more information.

       introColor
	      Specifies  the  highlighting  attributes	for normal compiler output.  Takes one or several color attributes.  See the section COLOR
	      ATTRIBUTES for more information.

       warningFileNameColor | errorFileNameColor
	      Specifies the highlighting attributes for the filename in a  warning  or	an  error,  respectively.   Takes  one	or  several  color
	      attributes.  See the section COLOR ATTRIBUTES for more information.

       warningNumberColor | errorNumberColor
	      Specifies  the  highlighting  attributes	for  the  line-number  in a warning or an error, respectively.	Takes one or several color
	      attributes.  See the section COLOR ATTRIBUTES for more information.

       warningMessageColor | errorMessageColor
	      Specifies the highlighting attributes for the message-text in a warning or an error,  respectively.   Takes  one	or  several  color
	      attributes.  See the section COLOR ATTRIBUTES for more information.

COLOR ATTRIBUTES

       The following attributes are valid for highlighting.

       clear, reset

       bold, underline, underscore, blink, reverse, concealed

       black, red, green, yellow, blue, magenta, cyan, white

       on_black, on_red, on_green, on_yellow, on_blue, on_magenta, on_cyan, on_white

SEE ALSO

       gcc(1), colorgcc(1)

HISTORY

       Jan 15 2003: Initial version of this manual-page.

REPORTING BUGS

       Report bugs to <jmoyers@geeks.com>

AUTHORS

       Jamie Moyers <jmoyers@geeks.com> is the author of colorgcc.

       This  manual  page  was	written  by Joe Wreschnig <piman@sacredchao.net>, and modified by David Weinehall <tao@debian.org>, for the Debian
       GNU/Linux system (but may be used by others).

COPYRIGHT

       Copyright (C) 2003 Jamie Moyers
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

								   Jan 15, 2003 						     COLORGCCRC(5)
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