Your Question: What Is Sigchld in Linux?
Contents What Is Sigchld in Linux? a Trap Signal That Indicates a Process Started by the Current Process Has Terminated. This Allows the Process to “Reap” the...
What is SIGCHLD in Linux? A trap signal that indicates a process started by the current process has terminated. This allows the process to “reap” the zombie process and evaluate the exit status and make decisions on why the process terminated.
What is the significance of the Sigchld signal?
The SIGCHLD signal is sent to a process when a child process terminates, is interrupted, or resumes after being interrupted. One common usage of the signal is to instruct the operating system to clean up the resources used by a child process after its termination without an explicit call to the wait system call.
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How do you catch Sigchld?
When a child process stops or terminates, SIGCHLD is sent to the parent process. The default response to the signal is to ignore it. The signal can be caught and the exit status from the child process can be obtained by immediately calling wait(2) and wait3(3C).
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