changing directories (i'm sure there is a simple solution for this) Post: 16403

Sponsored Content

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

03-01-2002

Registered User

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!

LivinFree

View Public Profile for LivinFree

Find all posts by LivinFree

10 More Discussions You Might Find Interesting

1. Programming

a very simple question (but i don't know)

how to write a program that receive a string from keyboard and then print it out. i write a program: main() { char str; gets(str); printf(str); } but when i compile it, the system said something like "new line is not last charicter" and sometime the system said "a3.c is up to date"...

2. UNIX for Dummies Questions & Answers

list file's by size order in sepecfied directory and sub directories

How do I list files of type "*.file" for example by size order recursively ?

3. Programming

may be simple but i don't know -- Print current date from C program

How to print current date of the Unix system accessing thru C++ program ? I wrote like this #include <time.h> ....... time_t tt; struct tm *tod; .... time(&tt); tod = localtime(&tt); cout << tod->tm_mon + 1 << "/" << tod->tm_mday << "/" ...

4. Shell Programming and Scripting

Clearify what it means under 'WHAT' when hit the 'w'-command

I wonder how I shall read the result below, especially 'what' shown below. The result was shown when I entered 'w'. E.g what is TOP? What is gosh ( what does selmgr mean?)? login@ idle JCPU PCPU what 6:15am 7:04 39 39 TOP 6:34am 6:45 45 45 TOP 6:41am ...

5. UNIX for Dummies Questions & Answers

Changing IP's

How do you change an IP address of an interface.

6. Shell Programming and Scripting

Alias's & Functions - simple question

Having a memory lapse: If I redefine a command using an alias or a function - How do I access the "real" command without specifying an absoulte path: i.e. function man { /usr/bin/man |more } alias ls='/usr/bin/ls -l' How do I specify the ls or man command above without the...

7. UNIX for Dummies Questions & Answers

here's how i did a very simple install of invidia drivers

ok i got the nvida drivers for mandrake9 rpm there is 3 rpms you must have glx ,kernel and something else email me if you want the precompiled drivers :: email removed :: once i got the drivers in stalled then i reseted the computer then i put the 1cd of mandrake9 in and did a upgrade i...

8. UNIX for Advanced & Expert Users

How to remove a file with a leading dash '-' in it's name?

Somehow someone created a file named '-ov' in the root directory. Given the name, the how was probably the result of some cpio command they bozo'ed. I've tried a number of different ways to get rid of it using * and ? wildcards, '\' escape patterns etc.. They all fail with " illegal option --...

9. Shell Programming and Scripting

What are the differences between 'bash' and 'sh'

Hopefully this doesn't come off as too much of a "newbie" question or a flamebait. But I have recently begun working with a Sun Solaris box after having spent the past five years working with RedHat. From what i can tell, thing look fairly similar and the 'man' command is some help. But I've...

10. Shell Programming and Scripting

Urgent solution for simple sed

Hi Im running this command on AIX in ksh. My input file samp1 contains 1 2 123 12345 When I execute the following sed i dont get a matching pattern sed -n '/{1}/p' samp1 Can anyone help me with this simple thing

LEARN ABOUT DEBIAN

dh_installdeb

DH_INSTALLDEB(1)						     Debhelper							  DH_INSTALLDEB(1)

NAME

       dh_installdeb - install files into the DEBIAN directory

SYNOPSIS

       dh_installdeb [debhelperoptions]

DESCRIPTION

       dh_installdeb is a debhelper program that is responsible for installing files into the DEBIAN directories in package build directories with
       the correct permissions.

FILES

       package.postinst
       package.preinst
       package.postrm
       package.prerm
	   These maintainer scripts are installed into the DEBIAN directory.

	   Inside the scripts, the token #DEBHELPER# is replaced with shell script snippets generated by other debhelper commands.

       package.triggers
       package.shlibs
	   These control files are installed into the DEBIAN directory.

       package.conffiles
	   This control file will be installed into the DEBIAN directory.

	   In v3 compatibility mode and higher, all files in the etc/ directory in a package will automatically be flagged as conffiles by this
	   program, so there is no need to list them manually here.

       package.maintscript
	   Lines in this file correspond to dpkg-maintscript-helper(1) commands and parameters.  Any shell metacharacters will be escaped, so
	   arbitrary shell code cannot be inserted here.  For example, a line such as "mv_conffile /etc/oldconffile /etc/newconffile" will insert
	   maintainer script snippets into all maintainer scripts sufficient to move that conffile.

	   A versioned Pre-Dependency on dpkg is needed to use dpkg-maintscript-helper(1). An appropriate Pre-Dependency is set in
	   ${misc:Pre-Depends} ; you should make sure to put that token into an appropriate place in your debian/control file.

SEE ALSO

       debhelper(7)

       This program is a part of debhelper.

AUTHOR

       Joey Hess <joeyh@debian.org>

9.20120909							    2011-09-12							  DH_INSTALLDEB(1)

10 More Discussions You Might Find Interesting

1. Programming

a very simple question (but i don't know)

Discussion started by: dell9

2. UNIX for Dummies Questions & Answers

list file's by size order in sepecfied directory and sub directories

Discussion started by: ferretman

3. Programming

may be simple but i don't know -- Print current date from C program

Discussion started by: ls1429

4. Shell Programming and Scripting

Clearify what it means under 'WHAT' when hit the 'w'-command

Discussion started by: Aelgen