Sigprocmask (Unix)

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The correct title of this article is sigprocmask (Unix). The initial letter is shown capitalized due to technical restrictions.

In Unix and Unix-like operating systems, sigprocmask is a function call used to change the list of currently blocked signals. Blocked signals are not delivered to the process until unblocked.

Signals that cannot be ignored (SIGKILL and SIGSTOP) cannot be blocked


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