Check whether the Script test. Sh is running.

#! /Bin/bash
# The preceding line must exist. Otherwise, the PS displays bash rather than test. Sh.

Isprocrunning (){
Echo "Check $1 is running or not"
Local p = 'ps-C $1-O pid = '# If multiple processes with the same name are running, $ P for example: "1111 2222"
For PID in $ P; do
If [$ PID-ne $]; then # Check whether the PS process is itself. This is required.
Echo "another proc $ PID is running"
Return 1
Else
Echo "Local PID is $ PID"
Fi
Done
Return 0
}

 

# Test
Isprocrunning 'basename $0'
If [$? -EQ 1]; then
Echo "is running"
Sleep 10
Else
Sleep 20
Fi

 

 

//////////////////////////////////////// /////////////////////////

# Another SectionCode,

Isprocrunning (){

Local user = 'whoam'

Echo 'ps-u root-f | grep $1 | grep-V grep'

Local procs = 'ps-U $ user-f | grep $1 | grep-V grep | gawk
'{Print $2 }''

For PID in $ procs; do

If [$ PID-ne $]; then

Echo $ PID

Return 1;

Fi

Done

Return 0

}

 

# However, the execution fails in the following way, and the script is always running.

# The reason is that the system starts a sub-shell to execute the functions in '', and the command parameters of the PS parent-child shell process are identical!

AA = 'iscrunning script_name'