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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-01-28 17:13:41 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-05-17 10:33:46 -0300 |
| commit | 56cf9e8eec3bdc0ce44efeda373de9d6b825ea1e (patch) | |
| tree | 1867665925ea0e43ff9ba08e2c3409f90abf7988 /sysdeps/unix/sysv/linux/sys | |
| parent | 32dd8c251a431c90451092653f0231a4ad2665e5 (diff) | |
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linux: Add pidfd_send_signal
This was added on Linux 5.1(3eb39f47934f9d5a3027fe00d906a45fe3a15fad)
as a way to avoid the race condition of using kill (where PID might be
reused by the kernel between between obtaining the pid and sending the
signal).
If the siginfo_t argument is NULL then pidfd_send_signal is equivalent
to kill. If it is not NULL pidfd_send_signal is equivalent to
rt_sigqueueinfo.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'sysdeps/unix/sysv/linux/sys')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sys/pidfd.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sys/pidfd.h b/sysdeps/unix/sysv/linux/sys/pidfd.h index 7194fc2a14..7bbc5e4863 100644 --- a/sysdeps/unix/sysv/linux/sys/pidfd.h +++ b/sysdeps/unix/sysv/linux/sys/pidfd.h @@ -38,4 +38,12 @@ extern int pidfd_open (__pid_t __pid, unsigned int __flags) __THROW; extern int pidfd_getfd (int __pidfd, int __targetfd, unsigned int __flags) __THROW; +/* Sends the signal SIG to the target process referred by the PIDFD. If + INFO points to a siginfo_t buffer, it will be populated. + + The FLAGS argument is reserved for future use, it must be specified + as 0. */ +extern int pidfd_send_signal (int __pidfd, int __sig, siginfo_t *__info, + unsigned int __flags) __THROW; + #endif /* _PIDFD_H */ |