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
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <poll.h>
int run_start(char* _prog)
{
pid_t pid = fork();
if( pid < 0 )
return 1;
else if (pid == 0)
return 0;
execl(_prog, _prog, NULL);
}
int run_stdio(char* _prog)
{
int fork_pipe_out[2];
int fork_pipe_in [2];
pid_t pid = 0;
if(pipe(fork_pipe_out) == -1)
return 1;
if(pipe(fork_pipe_in) == -1)
return 1;
if((pid = fork()) == -1)
return 2;
if (pid == 0)
{
dup2(fork_pipe_out[1], STDOUT_FILENO);
dup2(fork_pipe_in [0], STDIN_FILENO );
close (fork_pipe_out[0]);
close (fork_pipe_in [1]);
execl(_prog, _prog, NULL);
return 3;
}
else
{
printf("asdf\n");
close(fork_pipe_out[1]);
close(fork_pipe_in [0]);
int ret;
struct pollfd fds[2];
fds[0].fd = STDIN_FILENO;
fds[0].events = POLLIN;
fds[1].fd = fork_pipe_out[0];
fds[1].events = POLLIN;
while(1)
{
int timeout = 1; //Timeout msecs
ret = poll(fds, 2, timeout);
if(ret < 0)
break;
else if (ret == 0)
continue;
int nbytes;
char buffer[256];
if(fds[0].revents & POLLIN) //STDIN_FILENO
{
printf("a\n");
nbytes = read(STDIN_FILENO, buffer, sizeof(buffer));
write(fork_pipe_in[1], buffer, nbytes);
write(fork_pipe_in[1], "\n", 1);
}
if(fds[1].revents & POLLIN) //PIPE
{
printf("b\”");
nbytes = read(fork_pipe_out[0], buffer, sizeof(buffer));
write(STDOUT_FILENO, buffer, nbytes);
write(STDOUT_FILENO, "\n", 1);
}
}
wait(0);
}
}
int main(int argc, char* argv[])
{
printf("MegumInit explosion!\n");
run_stdio("yes");
return 0;
}
|