1
2
3#ifndef __PIDFD_H
4#define __PIDFD_H
5
6#define _GNU_SOURCE
7#include <errno.h>
8#include <fcntl.h>
9#include <sched.h>
10#include <signal.h>
11#include <stdio.h>
12#include <stdlib.h>
13#include <string.h>
14#include <syscall.h>
15#include <sys/mount.h>
16
17#include "../kselftest.h"
18
19#ifndef P_PIDFD
20#define P_PIDFD 3
21#endif
22
23#ifndef CLONE_PIDFD
24#define CLONE_PIDFD 0x00001000
25#endif
26
27#ifndef __NR_pidfd_open
28#define __NR_pidfd_open -1
29#endif
30
31#ifndef __NR_pidfd_send_signal
32#define __NR_pidfd_send_signal -1
33#endif
34
35#ifndef __NR_clone3
36#define __NR_clone3 -1
37#endif
38
39
40
41
42
43
44#define PID_RECYCLE 1000
45
46
47
48
49
50
51#define PIDFD_PASS 0
52#define PIDFD_FAIL 1
53#define PIDFD_ERROR 2
54#define PIDFD_SKIP 3
55#define PIDFD_XFAIL 4
56
57int wait_for_pid(pid_t pid)
58{
59 int status, ret;
60
61again:
62 ret = waitpid(pid, &status, 0);
63 if (ret == -1) {
64 if (errno == EINTR)
65 goto again;
66
67 return -1;
68 }
69
70 if (!WIFEXITED(status))
71 return -1;
72
73 return WEXITSTATUS(status);
74}
75
76static inline int sys_pidfd_open(pid_t pid, unsigned int flags)
77{
78 return syscall(__NR_pidfd_open, pid, flags);
79}
80
81static inline int sys_pidfd_send_signal(int pidfd, int sig, siginfo_t *info,
82 unsigned int flags)
83{
84 return syscall(__NR_pidfd_send_signal, pidfd, sig, info, flags);
85}
86
87#endif
88