LinuxQuestions.org - Regarding the behavior of function fork()

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Regarding the behavior of function fork()

Assume that we have a process which has created few semaphores,messages queues and has access to shared memory and also handles some signals. Now what will happened to all these and what are all get inherited by the child process if I do a fork().

Code:

signals

The set of signals pending for the child process is initialized to the empty set. those signals set to be delivered for the parent will not be delievered to the child.

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semaphores

Any semaphores that are open in the parent process shall also be open in the child process

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message queues

The child process shall have its own copy of the message queue descriptors of the parent.

Code:

shared memory

shared memory segments do would be attached and the attached count would be incremented by 1.