1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
#include <unistd.h>
#include <stdio.h>
#include <signal.h>
static int sigchld_no;
static int nosig_no;
static int weird_value;
void
sigchld_handler (int signo)
{
sigchld_no++;
printf ("Got sigchld %d.\n", sigchld_no);
}
int
call_me (int some_value)
{
int ret_val = 0;
int i;
for (i = 0; i < some_value; i++)
{
int result = 0;
if (i%2 == 0)
result = kill (getpid(), SIGCHLD);
else
sigchld_no++;
usleep(1000);
if (result == 0)
ret_val++;
}
usleep (10000);
return ret_val;
}
int
call_me_nosig (int some_value)
{
int ret_val = 0;
int i;
for (i = 0; i < some_value; i++)
weird_value += i % 4;
nosig_no += some_value;
return some_value;
}
int
main ()
{
int ret_val;
signal (SIGCHLD, sigchld_handler);
ret_val = call_me (2); // Stop here in main.
ret_val = call_me_nosig (10);
return 0;
}
|
