mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +00:00
56cf9e8eec
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>
50 lines
1.8 KiB
C
50 lines
1.8 KiB
C
/* Wrapper for file descriptors that refers to a process functions.
|
|
Copyright (C) 2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _PIDFD_H
|
|
|
|
#include <fcntl.h>
|
|
#include <bits/types/siginfo_t.h>
|
|
|
|
#define PIDFD_NONBLOCK O_NONBLOCK
|
|
|
|
/* Returns a file descriptor that refers to the process PID. The
|
|
close-on-exec is set on the file descriptor.
|
|
|
|
The FLAGS argument is reserved for future use, it must be specified
|
|
as 0. */
|
|
extern int pidfd_open (__pid_t __pid, unsigned int __flags) __THROW;
|
|
|
|
/* Duplicates an existing file descriptor TARGETFD in the process referred
|
|
by the PIDFD file descriptor PIDFD.
|
|
|
|
The FLAGS argument is reserved for future use, it must be specified
|
|
as 0. */
|
|
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 */
|