1 /* $FreeBSD$ */
2 #include <sys/types.h>
3 #include <sys/wait.h>
4 #include <err.h>
5 #include <errno.h>
6 #include <signal.h>
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <unistd.h>
10
11 int stop_received;
12 int exit_received;
13 int cont_received;
14
15 void
job_handler(int sig,siginfo_t * si,void * ctx)16 job_handler(int sig, siginfo_t *si, void *ctx)
17 {
18 int status;
19 int ret;
20
21 if (si->si_code == CLD_STOPPED) {
22 printf("%d: stop received\n", si->si_pid);
23 stop_received = 1;
24 kill(si->si_pid, SIGCONT);
25 } else if (si->si_code == CLD_EXITED) {
26 printf("%d: exit received\n", si->si_pid);
27 ret = waitpid(si->si_pid, &status, 0);
28 if (ret == -1)
29 errx(1, "waitpid");
30 if (!WIFEXITED(status))
31 errx(1, "!WIFEXITED(status)");
32 exit_received = 1;
33 } else if (si->si_code == CLD_CONTINUED) {
34 printf("%d: cont received\n", si->si_pid);
35 cont_received = 1;
36 }
37 }
38
39 void
job_control_test(void)40 job_control_test(void)
41 {
42 struct sigaction sa;
43 pid_t pid;
44 int count = 10;
45
46 sigemptyset(&sa.sa_mask);
47 sa.sa_flags = SA_SIGINFO;
48 sa.sa_sigaction = job_handler;
49 sigaction(SIGCHLD, &sa, NULL);
50 stop_received = 0;
51 cont_received = 0;
52 exit_received = 0;
53 fflush(stdout);
54 pid = fork();
55 if (pid == 0) {
56 printf("child %d\n", getpid());
57 kill(getpid(), SIGSTOP);
58 sleep(2);
59 exit(1);
60 }
61
62 while (!(cont_received && stop_received && exit_received)) {
63 sleep(1);
64 if (--count == 0)
65 break;
66 }
67 if (!(cont_received && stop_received && exit_received))
68 errx(1, "job signals lost");
69
70 printf("job control test OK.\n");
71 }
72
73 void
rtsig_handler(int sig,siginfo_t * si,void * ctx)74 rtsig_handler(int sig, siginfo_t *si, void *ctx)
75 {
76 }
77
78 int
main()79 main()
80 {
81 struct sigaction sa;
82 sigset_t set;
83 union sigval val;
84
85 /* test job control with empty signal queue */
86 job_control_test();
87
88 /* now full fill signal queue in kernel */
89 sigemptyset(&sa.sa_mask);
90 sa.sa_flags = SA_SIGINFO;
91 sa.sa_sigaction = rtsig_handler;
92 sigaction(SIGRTMIN, &sa, NULL);
93 sigemptyset(&set);
94 sigaddset(&set, SIGRTMIN);
95 sigprocmask(SIG_BLOCK, &set, NULL);
96 val.sival_int = 1;
97 while (sigqueue(getpid(), SIGRTMIN, val))
98 ;
99
100 /* signal queue is fully filled, test the job control again. */
101 job_control_test();
102 return (0);
103 }
104