3843921cf08933a4e6212f0e31e3762452b69456
[ust.git] / libustcomm / ustcomm.c
1 #include <sys/types.h>
2 #include <signal.h>
3 #include <errno.h>
4 #include <sys/socket.h>
5 #include <sys/un.h>
6
7 #include <stdio.h>
8 #include <stdlib.h>
9
10 #define UNIX_PATH_MAX 108
11 #define SOCK_DIR "/tmp/socks"
12 #define UST_SIGNAL SIGIO
13
14 static void signal_process(pid_t pid)
15 {
16 int result;
17
18 result = kill(pid, UST_SIGNAL);
19 if(result == -1) {
20 perror("kill");
21 return;
22 }
23
24 sleep(1);
25 }
26
27 int send_message(pid_t pid, const char *msg, const char *reply)
28 {
29 int fd;
30 int result;
31 struct sockaddr_un addr;
32 char *buf;
33
34 result = fd = socket(PF_UNIX, SOCK_DGRAM, 0);
35 if(result == -1) {
36 perror("socket");
37 return 1;
38 }
39
40 addr.sun_family = AF_UNIX;
41
42 result = snprintf(addr.sun_path, UNIX_PATH_MAX, "%s/%d", SOCK_DIR, pid);
43 if(result >= UNIX_PATH_MAX) {
44 fprintf(stderr, "string overflow allocating socket name");
45 return 1;
46 }
47
48 asprintf(&buf, "%s\n", msg);
49
50 signal_process(pid);
51
52 result = sendto(fd, buf, strlen(buf), 0, (struct sockaddr *)&addr, sizeof(addr));
53 if(result == -1) {
54 perror("sendto");
55 return 1;
56 }
57
58 free(buf);
59
60 return 0;
61 }
62
63
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