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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
***/
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include "id128-util.h"
#include "log.h"
#include "machine-id-setup.h"
#include "path-util.h"
#include "util.h"
static char *arg_root = NULL;
static bool arg_commit = false;
static bool arg_print = false;
static void help(void) {
printf("%s [OPTIONS...]\n\n"
"Initialize /etc/machine-id from a random source.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --root=ROOT Filesystem root\n"
" --commit Commit transient ID\n"
" --print Print used machine ID\n"
, program_invocation_short_name);
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
ARG_ROOT,
ARG_COMMIT,
ARG_PRINT,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "root", required_argument, NULL, ARG_ROOT },
{ "commit", no_argument, NULL, ARG_COMMIT },
{ "print", no_argument, NULL, ARG_PRINT },
{}
};
int c, r;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "hqcv", options, NULL)) >= 0)
switch (c) {
case 'h':
help();
return 0;
case ARG_VERSION:
return version();
case ARG_ROOT:
r = parse_path_argument_and_warn(optarg, true, &arg_root);
if (r < 0)
return r;
break;
case ARG_COMMIT:
arg_commit = true;
break;
case ARG_PRINT:
arg_print = true;
break;
case '?':
return -EINVAL;
default:
assert_not_reached("Unhandled option");
}
if (optind < argc) {
log_error("Extraneous arguments");
return -EINVAL;
}
return 1;
}
int main(int argc, char *argv[]) {
char buf[SD_ID128_STRING_MAX];
sd_id128_t id;
int r;
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
goto finish;
if (arg_commit) {
const char *etc_machine_id;
r = machine_id_commit(arg_root);
if (r < 0)
goto finish;
etc_machine_id = prefix_roota(arg_root, "/etc/machine-id");
r = id128_read(etc_machine_id, ID128_PLAIN, &id);
if (r < 0) {
log_error_errno(r, "Failed to read machine ID back: %m");
goto finish;
}
} else {
r = machine_id_setup(arg_root, SD_ID128_NULL, &id);
if (r < 0)
goto finish;
}
if (arg_print)
puts(sd_id128_to_string(id, buf));
finish:
free(arg_root);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
|
GitWeb