Files test How to recover a specific variable Post: 302981885

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Top Forums Shell Programming and Scripting Files test How to recover a specific variable Post 302981885 by rovf on Wednesday 21st of September 2016 02:58:15 AM

09-21-2016

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As for displaying the full path, you have two choices: If you know that the file names are always relative pathes, the easiest is to prepend $PWD/. If this is not the case, or if you want to have the path "cleaned up" by not containing .. elements, you need to convert it to an absolute path explicitly. Google for "how to convert a relative path to an absolute path".

Aside from this, the logic of your script is flawed. You obviously want to treat each file separately, i.e. create for each file some information, whether it is missing or not. You have (at least) two choices to achieve this:

The first ist to output the desired information INSIDE the if-block where you detect that the file is missing. The second one - if, for whatever reason, you want to keep problem DETECTION and problem REPORTING separate, I suggest a completely differnt approach:

Either use two arrays (one containing all the file names, and one containing a code for the problem occuring with each corresponding file, for instance "missing" or "ok"), or alternatively use only one associative array, where the key is the file name and the value is "missing" or "ok".

---------- Post updated at 08:58 AM ---------- Previous update was at 08:50 AM ----------

I just noticed - by re-reading your initial post - that you never indicated which shell you are using, so some of the suggestions (such as associative arrays) I gave might not work in your shell.

Hence, the first step would be that you decide on a certain shell language, before we can discuss, how exactly a problem can be solved.

Common language choices are:

- POSIX shell (most unconvenient to program, but maximum compatibility - this is often used by system administrators who have to manage a network of different Unix flavours or different shell versions)

- bash (chances are highest that, if you ask a colleague, s/he will know it)

- Zsh (IMO most convenient for shell programming)

- ksh (Many people like it; I can't comment on it, because of lack of experience)

I use for most of my shell programming Zsh, because it is really made for programmers, but bash is also a very popular choice.

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LEARN ABOUT DEBIAN

hotswaprc

HOTSWAPRC(5)							File Formats Manual						      HOTSWAPRC(5)

NAME

       hotswaprc - configuration file for  hotswap

DESCRIPTION

       /etc/hotswaprc is the global configuration file for the hotswap utility.

       It  allows system administrators to specify arbitrary shell scripts to be run after a device is inserted, as well as before and after it is
       removed. Scripts are selected according to the model name retrieved from the device. This is particularly helpful for automatic	configura-
       tion of CD-RW drives, which require SCSI emulation and bypass normal access via the IDE subsystem.

       hotswaprc  is  implemented  as  an  Extensible Mark-up Language (XML) application.  XML documents are structured using elements of the form
       <tag-name> content <tag-name>. A Document Type Definition (DTD) describes the possible content of each element.

       Please refer to the XML specification for more information. The hotswap distribution also contains an example file,  doc/hotswaprc.example,
       which includes the DTD for the configuration file format.

ELEMENTS

       <hotswap>
	      This is the root element of the document. Each valid hotswaprc must contain exactly one <hotswap> element. The <hotswap> element may
	      contain an arbitrary number of <device> elements.

       <device>
	      The configuration file contains one <device> element for every device for which scripts are defined. The <device>  element  is  com-
	      posed of the following elements in this order: <name>, <post-insert>, <pre-remove>, <post-remove>. All but <name> are optional.

       <name> The content of this element is the model identification string of the IDE device the current <device> element refers to.

       <post-insert>
	      Contains the shell script that is to be executed after the device has been inserted and registered with the kernel.

       <pre-remove>
	      Contains the shell script that is to be run before hotswap attempts to unregister the device.

       <post-remove>
	      Contains the shell script that is to be run after the device had been unregistered.

REPORT BUGS

       Report bugs to t.stadelmann1@physics.ox.ac.uk.

AUTHOR

       Written by Tim Stadelmann.

SEE ALSO

       hotswap(1), xhotswap(1).

COPYRIGHT

       Copyright (c) 2002-2003 Tim Stadelmann.

       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License (GPL), Version 2 or
       any later version published by the Free Software Foundation.

								26th November 2002						      HOTSWAPRC(5)