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
101
102
103
104
105
106
107
108
|
// SPDX-License-Identifier: BSD-3-Clause
#include "config.h"
#include "random-seed.h"
#include "util.h"
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
/* 3 hours */
#define DAEMONIZE_SLEEP_TIME (3*60*60)
static sig_atomic_t sigint = 0;
static sig_atomic_t sigterm = 0;
static void sighandler(int signum) {
switch (signum) {
case SIGHUP: /* do nothing; we just needed to interrupt sleep */ break;
case SIGINT: sigint = 1; break;
case SIGTERM: sigterm = 1; break;
default: abort();
}
}
void run(const char *mode, const char *seed_path) {
int exit_status = 0;
if (streq(mode, "load")) {
if (!load(seed_path)) {
if (noperms)
exit_status = 15;
else
exit_status = 1;
}
if (streq(seed_path, "-")) {
fputs("warning: cannot refresh stdin seed\n", stderr);
} else {
unsigned char random_buf[RAND_POOL_SIZE];
unsigned char *random_ptr = random_buf;
switch (random_get(random_buf, RAND_POOL_SIZE, GRND_NONBLOCK)) {
case RAND_POOL_SIZE:
break;
case -1:
if (errno != EAGAIN) {
perror("getrandom");
exit(1);
}
FALLS_THROUGH;
default:
if (daemon(0, 1) == -1) {
perror("error daemonizing, continuing without");
}
close(0);
close(1);
random_ptr = NULL;
}
if (!save(seed_path, random_ptr))
exit_status = 1;
}
exit(exit_status);
} else if (streq(mode, "save")) {
exit(!save(seed_path, NULL));
} else if (streq(mode, "daemonize")) {
if (streq(seed_path, "-")) {
fputs("error: seed_path cannot be - for daemonize\n", stderr);
exit(2);
}
if (!load(seed_path))
fputs("warning: failed to load initial entropy\n", stderr);
struct sigaction sa;
sa.sa_handler = sighandler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sigaction(SIGHUP, &sa, NULL);
sigaction(SIGINT, &sa, NULL);
sigaction(SIGTERM, &sa, NULL);
if (daemon(seed_path[0] != '/', 1) == -1) {
perror("error daemonizing");
exit(1);
}
close(0);
close(1);
// don't close stderr because we log there
while (true) {
if (sigint)
exit(exit_status);
if (!save(seed_path, NULL)) {
exit_status = 1;
fputs("an error occurred while saving, trying again later\n", stderr);
}
if (sigterm)
exit(exit_status);
sleep(DAEMONIZE_SLEEP_TIME);
}
} else if (streq(mode, "daemonise")) {
fputs("invalid mode (did you mean `daemonize'?)\n", stderr);
exit(2);
} else {
fputs("invalid mode, expected load, save, or daemonize\n", stderr);
exit(2);
}
}
|
