Visit Our UNIX and Linux User Community


one liner to extract path from PATH variable


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting one liner to extract path from PATH variable
# 1  
Old 02-04-2010
one liner to extract path from PATH variable

Hi,

Could anyone help me in writing a single line code by either using (sed, awk, perl or whatever) to extract a specific path from the PATH environment variable?

for eg: suppose the PATH is being set as follows

Code:
PATH=/usr/bin/:/usr/local/bin:/bin:/usr/sbin:/usr/bin/java:/usr/bin/perl3.4

I need to check whether the string "java" is there (consider "java" appears exactly one time for the time being), if it does exist I need to extract the path "/usr/bin/java".

Note: java path may appear at any position (i.e) it may be the first or the last path or appear in middle of the PATH setting. So my code should be efficient in handling all these
# 2  
Old 02-04-2010
If you have grep -o:
Code:
echo "$PATH"|grep -o "[^:]*java[^:]*"

-or-
Code:
echo "$PATH"|awk /java/ RS=":"


Last edited by Scrutinizer; 02-04-2010 at 11:24 PM..
# 3  
Old 02-04-2010
Code:
echo "PATH=/usr/bin/javax:/usr/local/bin:/bin:/usr/sbin:/usr/bin/java:/usr/bin/perl3.4" | \
awk '{sub("PATH=",X)}/java/' RS=":"


Previous Thread | Next Thread
Test Your Knowledge in Computers #555
Difficulty: Easy
In C, if double b = 3.14159265359; printf("b=%10f ", b); then the output with be b=3.141593
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Convert Relative path to Absolute path, without changing directory to the file location.

Hello, I am creating a file with all the source folders included in my git branch, when i grep for the used source, i found source included as relative path instead of absolute path, how can convert relative path to absolute path without changing directory to that folder and using readlink -f ? ... (4 Replies)
Discussion started by: Sekhar419
4 Replies

2. UNIX for Advanced & Expert Users

Command to see the logical volume path, device mapper path and its corresponding dm device path

Currently I am using this laborious command lvdisplay | awk '/LV Path/ {p=$3} /LV Name/ {n=$3} /VG Name/ {v=$3} /Block device/ {d=$3; sub(".*:", "/dev/dm-", d); printf "%s\t%s\t%s\n", p, "/dev/mapper/"v"-"n, d}' Would like to know if there is any shorter method to get this mapping of... (2 Replies)
Discussion started by: royalibrahim
2 Replies

3. Shell Programming and Scripting

Moving files from parent path to multiple child path using bash in efficient way

Hi All, Can you please provide some pointers to move files from Base path to multiple paths in efficient way.Folder Structure is already created. /Path/AdminUser/User1/1111/Reports/aaa.txt to /Path/User1/1111/Reports/aaa.txt /Path/AdminUser/User1/2222/Reports/bbb.txt to... (6 Replies)
Discussion started by: karthikgv417
6 Replies

4. Shell Programming and Scripting

Path a variable to sed that includes a path

Hi I'm trying to select text between two lines, I'm using sed to to this, but I need to pass variables to it. For example start="BEGIN /home/mavkoup/data" end="END" sed -n -e '/${start}/,/${end}/g' doesn't work. I've tried double quotes as well. I think there's a problem with the / in the... (4 Replies)
Discussion started by: mavkoup
4 Replies

5. Shell Programming and Scripting

Appending a path in user's PATH variable

Hello Folks, I want to append a path in user's PATH variable which should be available in current session. Background Numerous persons will run a utility. Aim is to add the absolute path of the utility the first time it runs so that next runs have the PATH in env & users can directly run... (6 Replies)
Discussion started by: vibhor_agarwali
6 Replies

6. Shell Programming and Scripting

How to extract strings from full path when full path is not fixed

/Path/snowbird9/nrfCompMgrRave1230100920.log.gz:09/20/2010 06:14:51 ERROR Error Message. /Path/snowbird6/nrfCompMgrRave1220100920.log.gz:09/20/2010 06:14:51 ERROR Error Message. /Path/snowbird14/nrfCompMgrRave920100920.log.gz:09/20/2010 06:14:51 ERROR Error Message.... (0 Replies)
Discussion started by: Shirisha
0 Replies

7. UNIX for Dummies Questions & Answers

How to extract the path

I make this script that uses "strace" to trace programs. The script looks for files that the program opens. It looks like this open("/lib/libtermcap.so.2", O_RDONLY) = 3 open("/dev/tty", O_RDWR|O_NONBLOCK|O_LARGEFILE) = 3 I want to extract the path without the quotes, preferably using grep and... (4 Replies)
Discussion started by: Samuel Gordon
4 Replies

8. Shell Programming and Scripting

remove a path from PATH environment variable

Hi I need a script which will remove a path from PATH environment variable. For example $echo PATH /usr/local/bin:/usr/bin:test/rmve:/usr/games $echo rmv test/rmve Here I need a shell script which will remove rmv path (test/rmve) from PATH... (9 Replies)
Discussion started by: madhu84
9 Replies

9. Shell Programming and Scripting

Extract path within path

Hi, I have a environmental variables, ORACLE_HOME=/u01/oracle/ORCL/db/tech/10.2.0 ORACLE_SID=ORCL Now I need to create a variable and need to extract some part from ORACLE_HOME. I need to get the path from ORACLE_HOME till ORACLE_SID as /u01/oracle/ORCL. I may need to check also... (6 Replies)
Discussion started by: sreejitnair123
6 Replies

10. Shell Programming and Scripting

Executing Commands From Non-Standard Path (Changing user's PATH secretely???)

Hi: I have a requirement as below: I have some standard Unix commands modified and kept them in a directory say /usr/clsh/bin. For example I have a script named "ls" kept here which is modified version of "ls" (say it always gives long listing i.e. ls -l). When any user logs on and types... (2 Replies)
Discussion started by: ramesh_samane
2 Replies

Featured Tech Videos