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Top Forums UNIX for Dummies Questions & Answers changing directories (i'm sure there is a simple solution for this) Post 16403 by LivinFree on Friday 1st of March 2002 04:57:26 AM
Old 03-01-2002
Oops, this was my silly error. The function should read:
Code:
goto () { 
cd ${PWD%/*/*/*}/${1}/${PWD#/*/*/*/} 
}

I forgot the cd in the first example, so it was trying to execute /usr/bin/lib/training/shakey. That's why you were getting the error telling you it was a directory.

Basically, instead of you executing the commands "pwd" and "cut" to find out where you were, and then to cut and paste the path, I tried to use builtin variables and manipulation.

In bash (and some other modern shells), the $PWD variable is automatically set when you change directory. It holds the current working directory. The other junk ( ##/*/ and similar...) is built in variable manipulation.
See this thread for an explanation:
https://www.unix.com/unix-for-advanced-and-expert-users/4542-what-does-means.html?s=

(By the way, the curly braces are needed around the variables with modifiers in them, and are optional for the "normal" ones, like in the above example, the ${1}. It simply protects them, and keeps everything seperate.)

Try variations on some of the examples... it's pretty neat to see what you can do.

And as for it handling a different number of directories, you would have to rewrite it, since this is hard-coded to chop the first two directories, change the third, and chop the thrid and fourth.

If you wanted a more "dynamic", or full featured function, it might be better to write an entire script to handle different situations...

Hope this helps, and please post back with any more questions!
 

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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
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