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Add pointers to rfork_thread(3)

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This commit is contained in:
Peter Wemm 2000-07-31 05:43:43 +00:00
parent f1bbdb9aec
commit 5cb2354662
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=64042
1 changed files with 12 additions and 3 deletions
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15
lib/libc/sys/rfork.2
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@ -61,10 +61,14 @@ will thus inherit and share all the segments the parent process owns,
whether they are normally shareable or not. The stack segment is
not split (both the parent and child return on the same stack) and thus
.Fn rfork
with the RFMEM flag may not generally be called directly from a high level
language. For example, you may not call it directly from C.
with the RFMEM flag may not generally be called directly from high level
languages including C.
May be set only with
.Dv RFPROC .
A helper function is provided to assist with this problem and will cause
the new process to run on the provided stack. See
.Fn rfork_thread 3
for information.
.It RFSIGSHARE
If set, the kernel will force sharing the sigacts structure between the
child and the parent.
@ -145,7 +149,8 @@ There is insufficient swap space for the new process.
.Xr fork 2 ,
.Xr intro 2 ,
.Xr minherit 2 ,
.Xr vfork 2
.Xr vfork 2 ,
.Xr rfork_thread 3
.Sh BUGS
FreeBSD does not yet implement a native
.Fn clone
@ -158,6 +163,10 @@ contains a working
.Fn
clone
call that utilizes RFMEM.
The
.Fn rfork_thread
library call can often be used instead of
.Fn clone .
.Sh HISTORY
The
.Fn rfork