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Full Discussion: Grep and sed (replace string in patterned lines)
Top Forums Shell Programming and Scripting Grep and sed (replace string in patterned lines) Post 302830647 by unknown7 on Tuesday 9th of July 2013 08:25:22 AM
Old 07-09-2013
Wrench Grep and sed (replace string in patterned lines)
Grep and Sed (replace string in patterned lines)

Hi all,
I want to grep for "PATTERN" and only if "PATTERN" is in a line, this line shall be used as replacement input e.g. for SED.

I don't get it running in one line.

NOT RUNNING - just first idea... I don't know how to redirect grep output to be used by sed in file
Code:
grep "PATTERN" FILENAME | xargs sed 's/ to be changed/, YEHA! to be changed/' [?FILE?]

Input example:
Quote:
This is text
Nothing changes unless PATTERN is found and th replace string.
Now its changed! Because of PATTERN is found... random stuff 1234... to be changed
blah PATTERN 987654321 blub to be changed
nothing to be done - even if to be changed is here
Expected output example:
Quote:
This is text
Nothing changes unless PATTERN is found and th replace string.
Now its changed! Because of PATTERN is found... random stuff 1234... , YEHA! to be changed
blah PATTERN 987654321 blub , YEHA! to be changed
nothing to be done - even if to be changed is here

Thanks a lot!
 

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LEARN ABOUT DEBIAN

defid

DEFID(1)							   User Commands							  DEFID(1)

NAME

       defid - [DESCRIPTION]

SYNOPSIS

       gid [OPTION]... PATTERN...

DESCRIPTION

       Query  ID database and report results.  By default, output consists of multiple lines, each line containing the matched identifier followed
       by the list of file names in which it occurs.

       -f, --file=FILE
	      file name of ID database

       -i, --ignore-case
	      match PATTERN case insensitively

       -l, --literal
	      match PATTERN as a literal string

       -r, --regexp
	      match PATTERN as a regular expression

       -w, --word
	      match PATTERN as a delimited word

       -s, --substring
	      match PATTERN as a substring

	      Note: If PATTERN contains extended regular expression metacharacters, it is interpreted as a regular expression  substring.   Other-
	      wise, PATTERN is interpreted as a literal word.

       -k, --key=STYLE
	      STYLE is one of `token', `pattern' or `none'

       -R, --result=STYLE
	      STYLE is one of `filenames', `grep', `edit' or `none'

       -S, --separator=STYLE
	      STYLE is one of `braces', `space' or `newline' and only applies to file names when `--result=filenames'

	      The above STYLE options control how query results are presented.	Defaults are --key=token --result=filenames --separator=space

       -F, --frequency=FREQ
	      find tokens that occur FREQ times, where FREQ is a range expressed as `N..M'.  If N is omitted, it defaults to 1, if M is omitted it
	      defaults to MAX_USHRT

       -a, --ambiguous=LEN
	      find tokens whose names are ambiguous for LEN chars

       -x, --hex
	      only find numbers expressed as hexadecimal

       -d, --decimal
	      only find numbers expressed as decimal

       -o, --octal
	      only find numbers expressed as octal

	      By default, searches match numbers of any radix.

       --help display this help and exit

       --version
	      output version information and exit

REPORTING BUGS

       Report bugs to bug-idutils@gnu.org

SEE ALSO

       The full documentation for defid is maintained as a Texinfo manual.  If the info and defid programs are properly installed  at  your  site,
       the command

	      info defid

       should give you access to the complete manual.

defid - 4.3.90.44-a04f						  September 2008							  DEFID(1)
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