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
|
/*
20160225
Jan Mojzis
Public domain.
*/
#include <sys/types.h>
#include <unistd.h>
#include <signal.h>
#include "log.h"
#include "packet.h"
#include "global.h"
#include "str.h"
#include "writeall.h"
static void cleanup(void) {
global_purge();
}
static void die_fatal(const char *trouble, const char *d, const char *fn) {
cleanup();
if (d) {
if (fn) log_f5(trouble, " ", d, "/", fn);
else log_f3(trouble, " ", d);
}
else {
log_f1(trouble);
}
_exit(111);
}
int main(int argc, char **argv) {
pid_t pid;
int tochild[2] = { -1, -1 };
int fromchild[2] = { -1, -1 };
const char *message;
long long messagelen;
if (argc < 2) _exit(111);
if (!argv[0]) _exit(111);
if (!argv[1]) _exit(111);
if (!argv[2]) _exit(111);
++argv;
message = *argv;
messagelen = str_len(message);
++argv;
if (pipe(tochild) == -1) _exit(111);
if (pipe(fromchild) == -1) _exit(111);
pid = fork();
if (pid == -1) _exit(111);
if (pid == 0) {
close(tochild[1]);
close(fromchild[0]);
if (dup2(tochild[0], 0) == -1) _exit(111);
if (dup2(fromchild[1], 1) == -1) _exit(111);
execvp(*argv, argv);
_exit(111);
}
close(tochild[0]);
close(fromchild[1]);
close(0); if (dup2(fromchild[0], 0) == -1) _exit(111);
close(1); if (dup2(tochild[1], 1) == -1) _exit(111);
signal(SIGPIPE, SIG_IGN);
global_init();
if (!packet_hello_receive()) die_fatal("unable to receive hello-string", 0, 0);
if (messagelen) {
if (writeall(1, message, messagelen) == -1) die_fatal("unable to write hello-string", 0, 0);
if (writeall(1, "\r\n", 2) == -1) die_fatal("unable to write hello-string", 0, 0);
}
_exit(111);
}
|
