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WAITPID WNOHANG hangs

asked 2016-04-29 00:37:15 -0600

oddestNeeds gravatar image

Well. My application calls posix_spawn to: launch a bash file which in turn: calls make & compiles my program.

The code has been working for years.

Now it doesn't. ( Fedora 24 latest updates )

It hangs on the wait. The forked process does not end. All the forked process does is launch a background process and exit immediately.

int waitPIDerr= waitpid( pid, NULL, 0 /* WNOHANG */ );

I'm thinking to simply wait on a loop then kill the pid. Which will work. But isn't right.

Any ideas as to why this code that has been working 100% reliable for years no longer works are welcome. To be fair. I use Linux. I'm no way any sort of expert on its many complexities.

However. This would appear to be an issue with OS upgrades.

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answered 2016-05-14 02:34:26 -0600

oddestNeeds gravatar image

Life is a mystery to me.

Since the process exits immediately,

I bypassed the waitpid && just killed the new pid.

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To get things to work for Fedora 24, I HAD TO BACK OUT THE CHANGE.

Using Fedora 24, the original code works as expected.

oddestNeeds gravatar imageoddestNeeds ( 2016-05-27 19:36:26 -0600 )edit

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Asked: 2016-04-29 00:37:15 -0600

Seen: 263 times

Last updated: May 14 '16