d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Document that setmode(3) is not thread safe.

Browse Source 
In some circumstances, setmode(3) may call umask(2) twice to retrieve
the current mode and then restore it.  Between calls, the process will
have a umask of 0.

Reviewed by:	markj
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D20982
This commit is contained in:
Brooks Davis 2019-07-18 21:33:55 +00:00
parent 62d2cf1847
commit ab9ef34e92
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=350116
1 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
lib/libc/gen/setmode.3
View File

@ -28,7 +28,7 @@
.\" @(#)setmode.3 8.2 (Berkeley) 4/28/95 .\" @(#)setmode.3 8.2 (Berkeley) 4/28/95
.\" $FreeBSD$ .\" $FreeBSD$
.\" .\"
.Dd February 22, 2015 .Dd July 18, 2019
.Dt SETMODE 3 .Dt SETMODE 3
.Os .Os
.Sh NAME .Sh NAME
@ -125,3 +125,10 @@ and
.Fn setmode .Fn setmode
functions first appeared in functions first appeared in
.Bx 4.4 . .Bx 4.4 .
.Sh BUGS
The
.Fn setmode
function is not thread safe.
Files created in other threads while
.Fn setmode
is being called may be created with a umask of 0.