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Name	Size	Permission	Date
GID	[ DIR ]	drwxr-xr-x	2024-03-03 22:50
Status	[ DIR ]	drwxr-xr-x	2024-03-03 22:50
Sys	[ DIR ]	drwxr-xr-x	2024-03-03 22:50
UID	[ DIR ]	drwxr-xr-x	2024-03-03 22:50
abort-c.yaml	395 B	-rw-r--r--	2023-07-26 13:48
cdesc-Process.yaml	3.85 KB	-rw-r--r--	2023-07-26 13:48
detach-c.yaml	1.91 KB	-rw-r--r--	2023-07-26 13:48
egid%3d-c.yaml	315 B	-rw-r--r--	2023-07-26 13:48
egid-c.yaml	454 B	-rw-r--r--	2023-07-26 13:48
euid%3d-c.yaml	302 B	-rw-r--r--	2023-07-26 13:48
euid-c.yaml	424 B	-rw-r--r--	2023-07-26 13:48
exec-c.yaml	1.22 KB	-rw-r--r--	2023-07-26 13:48
exit%21-c.yaml	421 B	-rw-r--r--	2023-07-26 13:48
exit-c.yaml	1.35 KB	-rw-r--r--	2023-07-26 13:48
fork-c.yaml	1.04 KB	-rw-r--r--	2023-07-26 13:48
getpgid-c.yaml	421 B	-rw-r--r--	2023-07-26 13:48
getpgrp-c.yaml	433 B	-rw-r--r--	2023-07-26 13:48
getpriority-c.yaml	863 B	-rw-r--r--	2023-07-26 13:48
getrlimit-c.yaml	868 B	-rw-r--r--	2023-07-26 13:48
gid%3d-c.yaml	269 B	-rw-r--r--	2023-07-26 13:48
gid-c.yaml	416 B	-rw-r--r--	2023-07-26 13:48
groups%3d-c.yaml	536 B	-rw-r--r--	2023-07-26 13:48
groups-c.yaml	417 B	-rw-r--r--	2023-07-26 13:48
initgroups-c.yaml	837 B	-rw-r--r--	2023-07-26 13:48
kill-c.yaml	963 B	-rw-r--r--	2023-07-26 13:48
maxgroups%3d-c.yaml	330 B	-rw-r--r--	2023-07-26 13:48
maxgroups-c.yaml	399 B	-rw-r--r--	2023-07-26 13:48
pid-c.yaml	368 B	-rw-r--r--	2023-07-26 13:48
ppid-c.yaml	609 B	-rw-r--r--	2023-07-26 13:48
setpgid-c.yaml	366 B	-rw-r--r--	2023-07-26 13:48
setpgrp-c.yaml	299 B	-rw-r--r--	2023-07-26 13:48
setpriority-c.yaml	605 B	-rw-r--r--	2023-07-26 13:48
setrlimit-c.yaml	2.41 KB	-rw-r--r--	2023-07-26 13:48
setsid-c.yaml	457 B	-rw-r--r--	2023-07-26 13:48
times-c.yaml	473 B	-rw-r--r--	2023-07-26 13:48
uid%3d-c.yaml	312 B	-rw-r--r--	2023-07-26 13:48
uid-c.yaml	414 B	-rw-r--r--	2023-07-26 13:48
wait-c.yaml	2.17 KB	-rw-r--r--	2023-07-26 13:48
wait2-c.yaml	772 B	-rw-r--r--	2023-07-26 13:48
waitall-c.yaml	878 B	-rw-r--r--	2023-07-26 13:48
waitpid-c.yaml	2.18 KB	-rw-r--r--	2023-07-26 13:48
waitpid2-c.yaml	778 B	-rw-r--r--	2023-07-26 13:48

Rename

--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
 body: Some operating systems retain the status of terminated child processes until the parent collects that status (normally using some variant of <tt>wait()</tt>. If the parent never collects this status, the child stays around as a zombie process. <tt>Process::detach</tt> prevents this by setting up a separate Ruby thread whose sole job is to reap the status of the process pid when it terminates. Use <tt>detach</tt> only when you do not intent to explicitly wait for the child to terminate. <tt>detach</tt> only checks the status periodically (currently once each second).
- !ruby/struct:SM::Flow::P 
 body: The waiting thread returns the exit status of the detached process when it terminates, so you can use <tt>Thread#join</tt> to know the result. If specified pid is not a valid child process ID, the thread returns <tt>nil</tt> immediately.
- !ruby/struct:SM::Flow::P 
 body: In this first example, we don't reap the first child process, so it appears as a zombie in the process status display.
- !ruby/struct:SM::Flow::VERB 
 body: " p1 = fork { sleep 0.1 }\n p2 = fork { sleep 0.2 }\n Process.waitpid(p2)\n sleep 2\n system(&quot;ps -ho pid,state -p #{p1}&quot;)\n"
- !ruby/struct:SM::Flow::P 
 body: produces:
- !ruby/struct:SM::Flow::VERB 
 body: " 27389 Z\n"
- !ruby/struct:SM::Flow::P 
 body: In the next example, <tt>Process::detach</tt> is used to reap the child automatically.
- !ruby/struct:SM::Flow::VERB 
 body: " p1 = fork { sleep 0.1 }\n p2 = fork { sleep 0.2 }\n Process.detach(p1)\n Process.waitpid(p2)\n sleep 2\n system(&quot;ps -ho pid,state -p #{p1}&quot;)\n"
- !ruby/struct:SM::Flow::P 
 body: (produces no output)
full_name: Process::detach
is_singleton: true
name: detach
params: |
 Process.detach(pid) => thread

visibility: public