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| author | Roland McGrath <roland@redhat.com> | 2008-07-25 19:45:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-26 12:00:09 -0700 |
| commit | fa00b80b3c41a845b3d56f866fb40a2e98754c51 (patch) | |
| tree | 819d6966cad1fdeef3f32497c696afb203e3720b /include | |
| parent | 7bcf6a2ca5f639b038c48711ebe6c4eca2036641 (diff) | |
| download | linux-fa00b80b3c41a845b3d56f866fb40a2e98754c51.tar.gz linux-fa00b80b3c41a845b3d56f866fb40a2e98754c51.tar.bz2 linux-fa00b80b3c41a845b3d56f866fb40a2e98754c51.zip | |
tracehook: job control
This defines the tracehook_notify_jctl() hook to formalize the ptrace
effects on the job control notifications. There is no change, only
cleanup.
Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/tracehook.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h index 42a0d7b11959..6dc428dd2f38 100644 --- a/include/linux/tracehook.h +++ b/include/linux/tracehook.h @@ -451,4 +451,24 @@ static inline int tracehook_get_signal(struct task_struct *task, return 0; } +/** + * tracehook_notify_jctl - report about job control stop/continue + * @notify: nonzero if this is the last thread in the group to stop + * @why: %CLD_STOPPED or %CLD_CONTINUED + * + * This is called when we might call do_notify_parent_cldstop(). + * It's called when about to stop for job control; we are already in + * %TASK_STOPPED state, about to call schedule(). It's also called when + * a delayed %CLD_STOPPED or %CLD_CONTINUED report is ready to be made. + * + * Return nonzero to generate a %SIGCHLD with @why, which is + * normal if @notify is nonzero. + * + * Called with no locks held. + */ +static inline int tracehook_notify_jctl(int notify, int why) +{ + return notify || (current->ptrace & PT_PTRACED); +} + #endif /* <linux/tracehook.h> */ |