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
|
/* $Id$ */
#include "bbs.h"
#include <getopt.h>
extern SHM_t *SHM;
int main(int argc, char *argv[])
{
int sleep_time = 5;
int num_per_loop = 500;
int i, j;
userinfo_t *uentp;
msgque_t msg;
time_t now;
int *sorted, UTMPnumber; // SHM snapshot
while ((i = getopt(argc, argv, "t:n:")) != -1)
switch (i) {
case 't':
sleep_time = atoi(optarg);
break;
case 'n':
num_per_loop = atoi(optarg);
break;
}
if (optind == argc || strlen(argv[optind]) == 0) {
fprintf(stderr, "no message to broadcast\n\n");
return 1;
}
printf("broadcast \"%s\" ? [y/N]\n", argv[optind]);
if (tolower(getchar()) != 'y')
return 0;
attach_SHM();
sorted = (int *)malloc(sizeof(int) * USHM_SIZE);
memcpy(sorted, SHM->sorted[SHM->currsorted][0], sizeof(int) * USHM_SIZE);
UTMPnumber = SHM->UTMPnumber;
msg.pid = currpid;
strlcpy(msg.userid, "系統廣播", sizeof(msg.userid));
snprintf(msg.last_call_in, sizeof(msg.last_call_in), "[廣播]%s", argv[optind]);
now = time(NULL);
for (i = 0, j = 1; i < UTMPnumber; ++i, ++j) {
if (j == num_per_loop) {
fprintf(stderr, "%5d/%5d\n", i + 1, UTMPnumber);
j = 1;
now = time(NULL);
sleep(sleep_time);
}
// XXX why use sorted list?
// can we just scan uinfo with proper checking?
uentp = &SHM->uinfo[sorted[i]];
if (uentp->pid && kill(uentp->pid, 0) != -1){
int write_pos = uentp->msgcount;
if (write_pos < (MAX_MSGS - 1)){
uentp->msgcount = write_pos + 1;
memcpy(&uentp->msgs[write_pos], &msg, sizeof(msg));
#ifdef NOKILLWATERBALL
uentp->wbtime = (time4_t)now;
#else
kill(uentp->pid, SIGUSR2);
#endif
}
}
}
return 0;
}
|
