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Top Forums Shell Programming and Scripting On how to select the right tool for a given task Post 302248046 by cfajohnson on Friday 17th of October 2008 12:37:29 AM
Old 10-17-2008
Quote:
Originally Posted by ghostdog74
i understand where you are coming from. but there are few situations i can think of that using shell provided internals are not suitable
1) writing portable scripts. The syntax that you use for string manipulations in bash for example, is not universal for every shell

The techniques I used are part of the standard UNIX shell.

They are portable to all modern *nix systems (and many older ones).

I used nothing that is bash specific.
Quote:
2) doing more complex string manipulation like grouped pattern matches.

When a regular expression, rather than wildcard expansion is necessary, then sed might be appropriate (though I would usually prefer awk).
Quote:
3) and of course, using sed to go over files can be faster than using pure shell constructs.

As I said, sed is for working with files.
 

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SPLASHY-CONFIG.XML(5)					 Splashy POSIX boot splash system				     SPLASHY-CONFIG.XML(5)

NAME
Splashy - a user-mode, POSIX and LSB compliant, boot splashing system for UNIX. SYNOPSIS
/etc/splashy/config.xml - Splashy's configuration file DESCRIPTION
/etc/splashy/config.xml sets splashy's behaviour during boot, shutdown inter-runlevel and error. It is an XML file where all values are enclosed in tags A tag is anything enclosed between < and >. An opening tag has the form "<tag>" while a closing tag has its name preceded with a backslash () character as in "< ag>" Tags can be considered as folders. Each tag either contains tags or contains a value The value of the final tag affects in the field defined by its parents tags The following tag folders are supported: <splashy> This tag is mandatory. It contains all splashy's configuration values, listed below. The following values are supported: <themes> Absolute path to the directory containing the installed splashy themes. Default: /etc/splashy/themes <current_theme> Name of the theme to use. It must be the name of a directory in <themes>'s value's directory. Default: default <default_theme> Full path to a theme to fall back to if the theme specified in <current_theme>'s value can't be found. Default: /etc/splashy/themes/default <pid> Full path to the PID file splashy will use to store its PID so that other processes can know if it is running. Default: /var/run/splashy.pid Comments can be introduced by enclsing them between <!-- and -->. Blank lines are also ignored EXAMPLES
The following is a complete and valid splashy configuration file: <splashy> <!-- themes directory: conventional path /etc/splashy/themes --> <themes>/etc/splashy/themes</themes> <!-- current theme could be relative the themes defined above or full path --> <current_theme>default</current_theme> <!-- full path to theme to fall back in case of problems. DO NOT CHANGE --> <default_theme>/etc/splashy/themes/default</default_theme> <!-- this defaults should be ok --> <pid>/var/run/splashy.pid</pid> </splashy> NOTES
Values are refered by their tag name prefixed with all of its parent tag's names. For example: "/splashy/pid" FILES
/etc/splashy/config.xml Main configuration. Defines how splashy should be setup /etc/splashy/themes/ Location where splashy themes are stored SEE ALSO
splashy(1), splashy_config(1), splashy_config(1), splashy-theme.xml(5) AUTHORS
Jacobo Vilella <jacobo221@gmail.com> perl v5.12.1 2010-07-05 SPLASHY-CONFIG.XML(5)
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