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
109
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <sys/socket.h>
#include <sys/poll.h>
#include <sys/types.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/un.h>
#include <sys/stat.h>
#include <sys/signalfd.h>
#include <getopt.h>
#include <stddef.h>
#include "log.h"
#include "macro.h"
#include "util.h"
static int send_on_socket(int fd, const char *socket_name, const void *packet, size_t size) {
union {
struct sockaddr sa;
struct sockaddr_un un;
} sa;
assert(fd >= 0);
assert(socket_name);
assert(packet);
zero(sa);
sa.un.sun_family = AF_UNIX;
strncpy(sa.un.sun_path, socket_name, sizeof(sa.un.sun_path));
if (sendto(fd, packet, size, MSG_NOSIGNAL, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(socket_name)) < 0) {
log_error("Failed to send: %m");
return -1;
}
return 0;
}
int main(int argc, char *argv[]) {
int fd = -1, r = EXIT_FAILURE;
char packet[LINE_MAX];
size_t length;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
if (argc != 3) {
log_error("Wrong number of arguments.");
goto finish;
}
if (streq(argv[1], "1")) {
packet[0] = '+';
if (!fgets(packet+1, sizeof(packet)-1, stdin)) {
log_error("Failed to read password: %m");
goto finish;
}
truncate_nl(packet+1);
length = 1 + strlen(packet+1) + 1;
} else if (streq(argv[1], "0")) {
packet[0] = '-';
length = 1;
} else {
log_error("Invalid first argument %s", argv[1]);
goto finish;
}
if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
log_error("socket() failed: %m");
goto finish;
}
if (send_on_socket(fd, argv[2], packet, length) < 0)
goto finish;
r = EXIT_SUCCESS;
finish:
if (fd >= 0)
close_nointr_nofail(fd);
return r;
}
|
