What does zombie process mean?

Definitions for zombie process
zom·bie process

Here are all the possible meanings and translations of the word zombie process.


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Wiktionary

  1. zombie processnoun

    A child process that has terminated but is still listed in the process table, having not yet been reaped by its parent process.

Freebase

  1. Zombie process

    On Unix and Unix-like computer operating systems, a zombie process or defunct process is a process that has completed execution but still has an entry in the process table. This entry is still needed to allow the parent process to read its child's exit status. The term zombie process derives from the common definition of zombie — an undead person. In the term's metaphor, the child process has "died" but has not yet been "reaped". Also, unlike normal processes, the kill command has no effect on a zombie process. When a process ends, all of the memory and resources associated with it are deallocated so they can be used by other processes. However, the process's entry in the process table remains. The parent can read the child's exit status by executing the wait system call, whereupon the zombie is removed. The wait call may be executed in sequential code, but it is commonly executed in a handler for the SIGCHLD signal, which the parent receives whenever a child has died. After the zombie is removed, its process identifier and entry in the process table can then be reused. However, if a parent fails to call wait, the zombie will be left in the process table. In some situations this may be desirable, for example if the parent creates another child process it ensures that it will not be allocated the same PID. On modern UNIX-like systems, the following special case applies: if the parent explicitly ignores SIGCHLD by setting its handler to SIG_IGN or has the SA_NOCLDWAIT flag set, all child exit status information will be discarded and no zombie processes will be left.

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Numerology

  1. Chaldean Numerology

    The numerical value of zombie process in Chaldean Numerology is: 3

  2. Pythagorean Numerology

    The numerical value of zombie process in Pythagorean Numerology is: 3

Images & Illustrations of zombie process

  1. zombie processzombie processzombie processzombie processzombie process


Translations for zombie process

From our Multilingual Translation Dictionary

  • ஜாம்பி செயல்முறைTamil

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    one whose prevailing mental imagery takes the form of inner feelings of action
    • A. lacerate
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