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When a child process terminates before the parent has called wait, the kernel retains some information about the process, such as its exit status, to enable its parent to call wait later. [3] Because the child is still consuming system resources but not executing it is known as a zombie process .
Then, the copy, called the "child process", calls the exec system call to overlay itself with the other program: it ceases execution of its former program in favor of the other. The fork operation creates a separate address space for the child. The child process has an exact copy of all the memory segments of the parent process.
In Unix and other POSIX-compatible systems, the parent process can retrieve the exit status of a child process using the wait() family of system calls defined in wait.h. [10] Of these, the waitid() [ 11 ] call retrieves the full exit status, but the older wait() and waitpid() [ 12 ] calls retrieve only the least significant 8 bits of the exit ...
An operating system may provide variations of the wait call that allow a process to wait for any of its child processes to exit, or to wait for a single specific child process (identified by its process ID) to exit. Some operating systems issue a signal to the parent process when a child process terminates, notifying the parent process and ...
Such an orphan process becomes a child of a special root process, which then waits for the child process to terminate. Likewise, a similar strategy is used to deal with a zombie process, which is a child process that has terminated but whose exit status is ignored by its parent process. Such a process becomes the child of a special parent ...
"It's useful to have a couple of options on [reasons a child is being made to come home] so that the kid can present you to his friends as straight-laced and firm (you didn't do your chores so you ...
From housekeepers suddenly without a job to parents desperate to appease a child who lost a favorite teddy bear, the L.A. County fires have created various levels of hardship for people in ...
The parents of a 13-year-old girl who was run over by a suicidal driver in Malibu in 2010 are appealing to California Gov. Gavin Newsom to stop the felon from being released on parole.