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cleanup $PATH with awk

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# 8  
Old 06-17-2009
Quote:
you can put the last ":" in a new line if you change $1 to $0 in the code:
Didn't change anything, when I use
Code:
PATH=` echo "$PATH" | /usr/xpg4/bin/awk -v RS=':' -v ORS=":" '!a[$0]++'`

Also, with printf no change.
# 9  
Old 06-17-2009
Quote:
Originally Posted by doc_symbiosis
Didn't change anything, when I use
Code:
PATH=` echo "$PATH" | /usr/xpg4/bin/awk -v RS=':' -v ORS=":" '!a[$0]++'`

Also, with printf no change.
Code:
what about /usr/ucb/echo -n did it work for you?

# 10  
Old 06-17-2009
ah ok, the '''-n''' for echo didn't work on solaris.

Code:
PATH=`printf "$PATH" | /usr/xpg4/bin/awk -v RS=':' -v ORS=":" '!a[$0]++'`

So I have two lines as output. How can I now only use the first one for $PATH?
# 11  
Old 06-17-2009
Quote:
Originally Posted by doc_symbiosis
ah ok, the '''-n''' for echo didn't work on solaris.

Code:
PATH=`printf "$PATH" | /usr/xpg4/bin/awk -v RS=':' -v ORS=":" '!a[$0]++'`

So I have two lines as output. How can I now only use the first one for $PATH?
Just add the below (in bold):-

Code:
PATH=`printf "$PATH" | /usr/xpg4/bin/awk -v RS=':' -v ORS=":" '!a[$0]++'` | nawk 'NR==1'

BR
# 12  
Old 06-17-2009
You can't change the PATH variable this way. The code is running in a new shell (child), once you return to the current shell the value is lost. I should unravel where the directory is set twice.
In the meantime, if you want to change the PATH variable in the current shell you're working on, you can make a script like:

Code:
#!/bin/ksh

export PATH=`echo "$PATH" | awk -F":" '{for (i=1;i<=NF;i++)if(!x[$i]++)print $i}'`

and run the script as follow:

Code:
. /path/of/script/scriptname

Bear in mind that the PATH variable is unchanged if you close the current shell.
# 13  
Old 06-17-2009
Quote:
Originally Posted by Franklin52
You can't change the PATH variable this way. The code is running in a new shell (child), once you return to the current shell the value is lost. I should unravel where the directory is set twice.
In the meantime, if you want to change the PATH variable in the current shell you're working on, you can make a script like:

Code:
#!/bin/ksh

export PATH=`echo "$PATH" | awk -F":" '{for (i=1;i<=NF;i++)if(!x[$i]++)print $i}'`

and run the script as follow:

Code:
. /path/of/script/scriptname

Bear in mind that the PATH variable is unchanged if you close the current shell.
That's true but if you are a root user then you can change it ...
# 14  
Old 06-17-2009
Quote:
Originally Posted by ahmad.diab
That's true but if you are a root user then you can change it ...
Nope, if you open a shell, change a variable and close the shell, the new value of the variable is lost, even if you login as root!

Regards
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