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How can I get the shell to understand the full path after following a symbolic link. In the example below I'd like the first "pwd" command to report "/Users/sholden/Projects/PS1/examples", and the "cd .." command to take me to /Users/sholden/Projects/PS1/ rather than back to my home directory. I have a dim memory of a setting that did this in the Bourne shell (or was it Korn) but I'm having trouble dredging up the details from 25 years ago ...

AirHead:~ sholden$ ls -ld examples
lrwxr-xr-x  1 sholden  staff  53 Nov 15 09:33 examples -> /Users/sholden/Projects/PS1/examples
AirHead:~ sholden$ cd examples
AirHead:examples sholden$ pwd
AirHead:examples sholden$ cd ..
AirHead:~ sholden$ pwd
AirHead:~ sholden$ 

Was it "set hardpaths?" Thanks in advance.

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2 Answers 2

up vote 5 down vote accepted

you should use cd with -P option to do that.

from man pange:

 -P     Handle the operand dot-dot physically; symbolic link components shall be resolved before dot-dot components
              are processed (see step 7. in the DESCRIPTION).

small test to show how does it work:

kent@ArchT60:/tmp$ ls -ld /opt/google/picasa/
drwxr-xr-x 3 root root 4096 Aug  5  2010 /opt/google/picasa/

kent@ArchT60:/tmp$ ln -s /opt/google/picasa/ cdLink
kent@ArchT60:/tmp$ ls -l cdLink
lrwxrwxrwx 1 kent kent 19 Nov 15 21:23 cdLink -> /opt/google/picasa/

kent@ArchT60:/tmp$ cd -P cdLink
kent@ArchT60:/opt/google/picasa$ pwd

kent@ArchT60:/opt/google/picasa$ cd /tmp/cdLink
kent@ArchT60:/tmp/cdLink$ cd -P ..

i think the example above showed what you are looking for.

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+1; fantastic, this is exactly what I tried to find before. –  sampson-chen Nov 15 '12 at 20:33
Yes, that is indeed what I needed. Thanks a lot for bringing me up to date. I now realie it was the C shell that had that unusual feature. –  holdenweb Nov 18 '12 at 9:54

I have never found a way to do it with symlinks, but if your goal is to quickly change between directories in shell, I wrote a blog post recently on several alternatives to accomplish exactly that.

The short answer is to use alias to add something similar to the following to your ~/.bashrc:

alias sf='cd ~/SmileForward/smileforward-backend/sfsite/smileforward'

Or export all the frequently used directories as variables into your ~/.bashrc, and just invoke directly with cd $dir_1 etc:

export dir_1='~/some_long_path_name/more_path_names1`
export dir_2='~/some_long_path_name/more_path_names2`

There's also a tool for switching directories based on frequency / recency called z that I never explored fully.

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alias or variable works for certain link->directorie(s). but not for all link->directories. –  Kent Nov 15 '12 at 20:34
@Kent ah; what I was suggesting was to do it w/o symlinks period. –  sampson-chen Nov 15 '12 at 20:35
in practical I have some variables like your dir_1, dir_2 as well (or put them in cdpath). But not for OP's purpose, just for going to some directory quickly and easily. –  Kent Nov 15 '12 at 20:37

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