Pid: Difference between revisions
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A pid is the process identication number. Special pids are [[swapper]] (0) and [[init]] (1). [[OpenBSD]] (by default) and [[FreeBSD]] chose random pid numbers when a new [[process]] is [[fork]]ed, other systems chose the next sequentially available number. | A pid is the process identication number. Special pids are [[swapper]] (0) and [[init]] (1). [[OpenBSD]] (by default) and [[FreeBSD]] chose random pid numbers when a new [[process]] is [[fork]]ed, other systems chose the next sequentially available number, when the maximum pid number is reached the number will wrap around back to the beginning. This means that pids are recycled and on a busy system it may not take long for a new process to take the pid of another process that just ended. | ||
Revision as of 05:31, 7 October 2005
A pid is the process identication number. Special pids are swapper (0) and init (1). OpenBSD (by default) and FreeBSD chose random pid numbers when a new process is forked, other systems chose the next sequentially available number, when the maximum pid number is reached the number will wrap around back to the beginning. This means that pids are recycled and on a busy system it may not take long for a new process to take the pid of another process that just ended.
