Shell Script to remove all symbolic links (symlinks) to non existent files and directories
Dear Experts (and Farzanj),
I need to write a script, which removes all symbolic links (symlinks) which point toward non existent objects such as: files and directories, in a directory [given as the argument].
Using the script, the directory should be given as the script argument:
$ script-name directory-name
The person who provides the correct solution will be awarded respectably.
Kind regards, SME_Paddington
I need to write a script, which removes all symbolic links (symlinks) which point toward non existent objects such as: files and directories, in a directory [given as the argument].
Using the script, the directory should be given as the script argument:
$ script-name directory-name
The person who provides the correct solution will be awarded respectably.
Kind regards, SME_Paddington
#!/bin/bash
echo "The directory in which symlinks are to be removed:"
echo $@SOLUTION
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ASKER
Dear Experts,
I do not mind if I need to be in the directory, containing the target directory when it needs to be run.
So for example:
$ ls $PWD
script.sh
Documents
Downloads
$ ./script.sh Documents
If this is not what you are referring to, could you please kindly explain it to me.
Kind Regards
I do not mind if I need to be in the directory, containing the target directory when it needs to be run.
So for example:
$ ls $PWD
script.sh
Documents
Downloads
$ ./script.sh Documents
If this is not what you are referring to, could you please kindly explain it to me.
Kind Regards
SOLUTION
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ASKER CERTIFIED SOLUTION
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SOLUTION
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SOLUTION
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ASKER
Dear Experts,
I am very impressed. Sorry I was not able to reply instantaneously - I was at work, and we were having to perform remote batch installs using ftp scripts - as far as this thread is concerned there are multiple acceptable solutions. As you will see from the results below, there are two different kinds of results, although I am not sure which is the entirely [100%] correct result, I am planning on allocating a spread of points to all of you, because nearly all solutions were valid.
A 5 way split has been performed in the interests of fairness.
Thank you very much guys! I will be posting another question today, and hope you can help.
Each result below is the respective posting above, so top to bottom.
Kind regards, SME_Paddington.
I am very impressed. Sorry I was not able to reply instantaneously - I was at work, and we were having to perform remote batch installs using ftp scripts - as far as this thread is concerned there are multiple acceptable solutions. As you will see from the results below, there are two different kinds of results, although I am not sure which is the entirely [100%] correct result, I am planning on allocating a spread of points to all of you, because nearly all solutions were valid.
A 5 way split has been performed in the interests of fairness.
Thank you very much guys! I will be posting another question today, and hope you can help.
Each result below is the respective posting above, so top to bottom.
Kind regards, SME_Paddington.
G1:~$ ./ftest.sh
The directory in which symlinks are to be removed:
./.pulse/2c8ccce2cef5ef0a3939b5eb00000017-runtime points to non-existent /tmp/pulse-pv2tPhMUJSTb
G1:~$ pico ftest.sh
G1:~$ ./ftest.sh
The directory in which symlinks are to be removed:
./.pulse/2c8ccce2cef5ef0a3939b5eb00000017-runtime is a dead symbolic link
./.Private/ECRYPTFS_FNEK_ENCRYPTED.FWYHkmMYQFEeBURTAIdjbi1muFEu9YvycVrR2KvXg-t3PTfIbHLyI8dWTk--/ECRYPTFS_FNEK_ENCRYPTED.FYYHkmMYQFEeBURTAIdjbi1muFEu9YvycVrRidd7O5PVRPlUzd6gV1Y5d4Hp0N9PApXxKCsbBZMPeMr5AwpB3s63UojZWE40CIAM is a dead symbolic link
./.Private/ECRYPTFS_FNEK_ENCRYPTED.FWYHkmMYQFEeBURTAIdjbi1muFEu9YvycVrRvsKBmD3QbjclzVPMVO1tHU-- is a dead symbolic link
./.Private/ECRYPTFS_FNEK_ENCRYPTED.FWYHkmMYQFEeBURTAIdjbi1muFEu9YvycVrRFfjiOPJuNNwlwS6tc98vF--- is a dead symbolic link
G1:~$ ./ftest.sh Documents
The directory in which symlinks are to be removed:
Documents
G1:~$ pico ftest.sh
G1:~$ ./ftest.sh
The directory in which symlinks are to be removed:
./.pulse/2c8ccce2cef5ef0a3939b5eb00000017-runtime is a dead symbolic link
./.Private/ECRYPTFS_FNEK_ENCRYPTED.FWYHkmMYQFEeBURTAIdjbi1muFEu9YvycVrR2KvXg-t3PTfIbHLyI8dWTk--/ECRYPTFS_FNEK_ENCRYPTED.FYYHkmMYQFEeBURTAIdjbi1muFEu9YvycVrRidd7O5PVRPlUzd6gV1Y5d4Hp0N9PApXxKCsbBZMPeMr5AwpB3s63UojZWE40CIAM is a dead symbolic link
./.Private/ECRYPTFS_FNEK_ENCRYPTED.FWYHkmMYQFEeBURTAIdjbi1muFEu9YvycVrRvsKBmD3QbjclzVPMVO1tHU-- is a dead symbolic link
./.Private/ECRYPTFS_FNEK_ENCRYPTED.FWYHkmMYQFEeBURTAIdjbi1muFEu9YvycVrRFfjiOPJuNNwlwS6tc98vF--- is a dead symbolic link
G1:~$ pico ftest.sh
G1:~$ ./ftest.sh
The directory in which symlinks are to be removed:
Link ./.pulse/2c8ccce2cef5ef0a3939b5eb00000017-runtime to non-existent Target /tmp/pulse-pv2tPhMUJSTb needs to be removed
G1:~$ pico ftest.sh
G1:~$ ./ftest.sh
The directory in which symlinks are to be removed:
./.pulse/2c8ccce2cef5ef0a3939b5eb00000017-runtime is a dead symbolic link
./.Private/ECRYPTFS_FNEK_ENCRYPTED.FWYHkmMYQFEeBURTAIdjbi1muFEu9YvycVrR2KvXg-t3PTfIbHLyI8dWTk--/ECRYPTFS_FNEK_ENCRYPTED.FYYHkmMYQFEeBURTAIdjbi1muFEu9YvycVrRidd7O5PVRPlUzd6gV1Y5d4Hp0N9PApXxKCsbBZMPeMr5AwpB3s63UojZWE40CIAM is a dead symbolic link
./.Private/ECRYPTFS_FNEK_ENCRYPTED.FWYHkmMYQFEeBURTAIdjbi1muFEu9YvycVrRvsKBmD3QbjclzVPMVO1tHU-- is a dead symbolic link
./.Private/ECRYPTFS_FNEK_ENCRYPTED.FWYHkmMYQFEeBURTAIdjbi1muFEu9YvycVrRFfjiOPJuNNwlwS6tc98vF--- is a dead symbolic link
G1:~$ find . -type l ! -execdir test -e {} \; -print
./.pulse/2c8ccce2cef5ef0a3939b5eb00000017-runtime
G1:~$ASKER
Excellent guys, I am impressed and amazed at your collective wealth of knowledge.
Tintin's solution has been graded as the best, due to its usability and the fact that I personally am not using Red Hat.
(Ubuntu Linux 10.4)
Simon your style of code from what I can tell was based upon Tintin's although, in terms of portability - excellent. As I do not have Red Hat systems on my home corporate network, I cannot test it, but excellent idea, and it is the best, in terms of portability if I was using Red Hat.
If I could choose two best solutions, I would. But as I cannot, the award goes to Tintin.
Warmest regards, and thank you all very much.
I will be posting another question today.
Tintin's solution has been graded as the best, due to its usability and the fact that I personally am not using Red Hat.
(Ubuntu Linux 10.4)
Simon your style of code from what I can tell was based upon Tintin's although, in terms of portability - excellent. As I do not have Red Hat systems on my home corporate network, I cannot test it, but excellent idea, and it is the best, in terms of portability if I was using Red Hat.
If I could choose two best solutions, I would. But as I cannot, the award goes to Tintin.
Warmest regards, and thank you all very much.
I will be posting another question today.
27820128 0 lrwxrwxrwx 1 simon users 4 May 11 09:51 ./dir1/george -> fred
You would need to cd to "dirname $link" before testing for the existence of fred.