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wait(2): clarify reparenting of children of the exiting process.

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Point to the existence of reapers and mention that init is the default
reaper.

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
This commit is contained in:
kib 2019-08-11 15:47:48 +00:00
parent 334dd0a5ca
commit 75eca26976
1 changed files with 8 additions and 3 deletions
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11
lib/libc/sys/wait.2
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@ -28,7 +28,7 @@
.\" @(#)wait.2 8.2 (Berkeley) 4/19/94
.\" $FreeBSD$
.\"
.Dd October 24, 2018
.Dd August 11, 2019
.Dt WAIT 2
.Os
.Sh NAME
@ -511,8 +511,12 @@ A status of 0 indicates normal termination.
.Pp
If a parent process terminates without
waiting for all of its child processes to terminate,
the remaining child processes are assigned the parent
process 1 ID (the init process ID).
the remaining child processes are re-assigned to the reaper
of the exiting process as the parent, see
.Xr procctl 2
.Dv PROC_REAP_ACQUIRE .
If no specific reaper was assigned, the process with ID 1, the init process,
becomes the parent of the orphaned children by default.
.Pp
If a signal is caught while any of the
.Fn wait
@ -648,6 +652,7 @@ do not specify a valid set of processes.
.El
.Sh SEE ALSO
.Xr _exit 2 ,
.Xr procctl 2 ,
.Xr ptrace 2 ,
.Xr sigaction 2 ,
.Xr exit 3 ,