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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2020-10-24 12:54:11 +0200 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2021-06-10 10:40:17 +1200 |
| commit | 730a8d48d1f67a3772d6d276a8365039e921c108 (patch) | |
| tree | 746c523e2dd6216fbe8052adc00fcf1aef240b08 /man7/signal.7 | |
| parent | fd1295e8f14b8b3a13beeb716e5a91ca46d8e893 (diff) | |
| download | man-pages-730a8d48d1f67a3772d6d276a8365039e921c108.tar.gz | |
signal.7: Add reference to seccomp_unotify(2)
The seccomp user-space notification feature can cause changes in
the semantics of SA_RESTART with respect to system calls that
would never normally be restarted. Point the reader to the page
that provide further details.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Diffstat (limited to 'man7/signal.7')
| -rw-r--r-- | man7/signal.7 | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/man7/signal.7 b/man7/signal.7 index 29c160fa26..bc31556055 100644 --- a/man7/signal.7 +++ b/man7/signal.7 @@ -857,6 +857,15 @@ The .BR sleep (3) function is also never restarted if interrupted by a handler, but gives a success return: the number of seconds remaining to sleep. +.PP +In certain circumstances, the +.BR seccomp (2) +user-space notification feature can lead to restarting of system calls +that would otherwise never be restarted by +.BR SA_RESTART ; +for details, see +.BR seccomp_unotify (2). +.\" .SS Interruption of system calls and library functions by stop signals On Linux, even in the absence of signal handlers, certain blocking interfaces can fail with the error |