CODEWITHSUNDEEP
linuxbashprocessscriptingps
user1289
user1289

Reputation: 1321

Bash: Easy way to know whether there is a thread with specified thread id?

I need to know if there is a thread with specified thread id. Probably I can look at all process's threads and see if it exists, or get all thread list with ps command and try to find thread in output, but isn't there a simpler way?

Upvotes: 1

Views: 2058

Answers (1)

neuhaus
neuhaus

Reputation: 4094

I'm assuming you are on Linux?

If you know the process id you can use the proc filesystem to figure out whether a certain thread exists or not.

Example:

Process ID $PID 14456

Thread ID $TID 14465

If the directory /proc/$PID/task/$TID exists, the thread is running.

If you don't know the process ID you can let the shell do the globbing for you:

if [ -d /proc/*/task/$TID ]; then echo found; fi

Upvotes: 1

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