Check to see if script is already running

Shell Programming and Scripting
1

Happy New Year

Is there a quick way to check to see if a script is already running.

I want to put in a check in the script to exit, if already running.

Currerntly i can only think of doing it the following way.


# ps -ef | grep -i 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh | grep -vi "grep"
nbuinadm 18684 18775  0 10:38 pts/4    00:00:01 /usr/bin/ksh /usr/LDN_VTL_HouseKeeping/3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
2

Your approach seem to be correct. But do you really need "grep -i"?
I think you should be specific to make sure you are actually referring to the correct process.

You can shorten the command if you have pgrep

3

Could you please provide the syntax, i have tried the following..

# ps -ef | pgrep -u 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
pgrep: invalid user name: 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
# ps -ef | pgrep -U 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
pgrep: invalid user name: 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
# ps -ef | pgrep -P 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
pgrep: not a number: 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
# ps -ef | pgrep -g 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
pgrep: invalid process group: 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
# ps -ef | pgrep -s 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
pgrep: invalid session id: 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
# ps -ef | pgrep -U 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
pgrep: invalid user name: 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
# ps -ef | pgrep -G 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
pgrep: invalid group name: 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
# ps -ef | pgrep -t 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
4

pgrep is short for ps .. | grep..
This avoids using the extra pipe and grep.

pgrep "process_name"

Please check man pages for various flags.

5

Its not a process, but a script i am checking for.

6

Your running script is a process for the OS ...
You may try to match against the full command line with -f:

pgrep -f 3_HOUSEKEEPING_FFTVTL_TO_FFTDSSU_DUPLICATION.ksh
1 Like