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Full Discussion: Using sed to get a substring
Top Forums Shell Programming and Scripting Using sed to get a substring Post 302283726 by cfajohnson on Tuesday 3rd of February 2009 11:18:08 PM
Old 02-04-2009
Quote:
Originally Posted by CentaurAtlas
Hi,
I have looked all over for this. I am attempting to get a the substring of a string using sed since it seemed the best solution for this.

For example my string is: "zzz foo to you and bar123 or foo"

I would like to extract the text between "and" and "or" (it could be anything, but that was my test string). "and" and "or" are unique in the string and the example is a single line, but it would be good to have it work on an arbitrary chunk of text.

To do so I thought I could do a match from the beginning of the string and just replace from the start to and with nothing. Then do the same from the reverse:

echo "zzz foo to you and bar123 or foo" | sed -e 's/[\*]and//' | more

There's no need for sed (and even less need for more):

Code:
string="zzz foo to you and bar123 or foo"
temp=${string##*and}
printf "%s\n" "${temp%%or*}"

Quote:
(I was piping the text into sed vs a file just for easy of copying and pasting, but it will be the output of another process.)

If the ouput of the process is a single line, save the output of the other process in a variable then use the above lines:

Code:
string=$( another_process ... )

If there will be multi-line output, use sed or awk, e.g.:

Code:
another_process | sed 's/.*and\(.*\)or.*/\1/'

 

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LEARN ABOUT DEBIAN

gobject-query

gobject-query(1)                                                   User Commands                                                  gobject-query(1)

NAME

       gobject-query - displays information about gobject types

SYNOPSIS

       gobject-query qualifier [-r type] [ -i | -b ""] [-s #] [-n] [-h]

DESCRIPTION

       gobject-query can be used to display the different types of gobjects provided by the glib library

OPTIONS

       The following options are supported:

       -b       Specifies the indent string. This option only applies to the output layout.

       -h       Displays a help message about the gobject-query command, and the options that you can use with the gobject-query command.

       -i       Specifies an incremental indent string. This option only applies to the output layout.

       -n       Specifies that gobject-query should not descend the type tree. This means that derived types are not displayed.

       -r       Specifies the root type, for example, GObject, GParam.

       -s       Specifies the line spacing. This option only applies to the output layout.

OPERANDS

       The following operands are supported:

       qualifier       The following qualifiers are supported:

                       froots   Iterates over the fundamental root

                       tree     Prints the type tree

EXAMPLES

       Example 1: Displaying All Types Provided by glib and Derived from GParam

       example% gobject-query tree GParam

       Example 2: Changing the Output Layout

       example% gobject-query froots
       |
       `void
       |
       `void
       |
       `void
       |
       `void
       |
       `GInterface
         |
         `GTypePlugin

       example% gobject-query froots -b foo
       foo|
       foo`void
       foo|
       foo`void
       foo|
       foo`void
       foo|
       foo`void
       foo|
       foo`GInterface

       example% gobject-query froots -s 5
       |
       |
       |
       |
       |
       `void
       |
       |
       |
       |
       |
       `void
       |
       |
       |
       |
       |
       `void
       ...

ENVIRONMENT VARIABLES

       See environ(5) for descriptions of the following environment variables that affect the execution of gobject-query: NLSPATH.

EXIT STATUS

       The following exit values are returned:

       0        Application exited successfully

       >0       Application exited with failure

FILES

       The following files are used by this application:

       /usr/bin/gobject-query  The command-line executable for the application.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWgnome-base-libs-devel    |
       +-----------------------------+-----------------------------+
       |Interface stability          |Evolving                     |
       +-----------------------------+-----------------------------+

SEE ALSO

       The pango documentation can be found at the following URL:

       file:///usr/share/gnome/devel-doc/pango

NOTES

       Written by Erwann Chenede, Sun Microsystems  Inc., 2003.

SunOS 5.10                                                          8 Apr 2003                                                    gobject-query(1)
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