Creating a saferm that runs like rm


 
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Old 11-07-2005
Question Creating a saferm that runs like rm

Hi,

I have a problem with the following. I am trying to learn UNIX and as I am not an expert I don't know how to do the following exercise:

Requirement: Show knowledge of how to use some or all of the following commands:

· rm
· cp
· mv
· if
· test
· alias
· getopts and shift (See by man bash)
· how the path works

Safe rm command

Write a safe rm command to replace the UNIX rm command i.e. it should work exactly the same, error messages etc. The new command should move the deleted files/directories to a directory called $HOME/deleted. If the file is already in $HOME/deleted it should be replaced by the current version. Also you should make it possible so the user can restore the file/directory in its previous directory.

PLEASE HELP ME!!!!

Regards,

pksb
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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD