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| author | Karel Zak | 2013-01-15 11:14:03 +0100 |
|---|---|---|
| committer | Karel Zak | 2013-01-15 11:18:28 +0100 |
| commit | 741587f3e97ee8b610c54860ccc40b351aef14ee (patch) | |
| tree | 7f5ee8e5d29f54220881629873a03c50fa5f0ab4 /misc-utils/kill.1 | |
| parent | findmnt: make --target usable with bind mounts (diff) | |
| download | kernel-qcow2-util-linux-741587f3e97ee8b610c54860ccc40b351aef14ee.tar.gz kernel-qcow2-util-linux-741587f3e97ee8b610c54860ccc40b351aef14ee.tar.xz kernel-qcow2-util-linux-741587f3e97ee8b610c54860ccc40b351aef14ee.zip | |
kill: add note about threads to the man page
Addresses: http://bugzilla.redhat.com/show_bug.cgi?id=846790
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'misc-utils/kill.1')
| -rw-r--r-- | misc-utils/kill.1 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/misc-utils/kill.1 b/misc-utils/kill.1 index 09d30e9cd..404fb724e 100644 --- a/misc-utils/kill.1 +++ b/misc-utils/kill.1 @@ -97,6 +97,26 @@ signal. If the receiving process has installed a handler for this signal using the SA_SIGINFO flag to .BR sigaction (2), then it can obtain this data via the si_value field of the siginfo_t structure. +.SH NOTES +It's not possible to send a signal to explicitly selected thread in a +multithreaded process by +.BR kill (2) +syscall. If +.BR kill(2) +is used to send a signal to a thread group, then +kernel selects arbitrary member of the thread group that has not blocked +the signal. For more details see +.BR clone (2) +CLONE_THREAD description. + +The command +.BR kill (1) +as well as syscall +.BR kill (2) +accepts TID (thread ID, see +.BR gettid (2)) +as argument. In this case the kill behavior is not changed and the signal is +also delivered to the thread group rather than to the specified thread. .SH "SEE ALSO" .BR bash (1), .BR tcsh (1), |