discover: move device sources to the device handler
[petitboot] / discover / pb-discover.c
1
2 #if defined(HAVE_CONFIG_H)
3 #include "config.h"
4 #endif
5
6 #include <assert.h>
7 #include <getopt.h>
8 #include <stdlib.h>
9 #include <signal.h>
10 #include <string.h>
11
12 #include <waiter/waiter.h>
13 #include <log/log.h>
14 #include <process/process.h>
15 #include <talloc/talloc.h>
16
17 #include "discover-server.h"
18 #include "device-handler.h"
19 #include "sysinfo.h"
20 #include "platform.h"
21
22 static void print_version(void)
23 {
24         printf("pb-discover (" PACKAGE_NAME ") " PACKAGE_VERSION "\n");
25 }
26
27 static void print_usage(void)
28 {
29         print_version();
30         printf(
31 "Usage: pb-discover [-a, --no-autoboot] [-h, --help] [-l, --log log-file]\n"
32 "                   [-n, --dry-run] [-V, --version]\n");
33 }
34
35 /**
36  * enum opt_value - Tri-state options variables.
37  */
38
39 enum opt_value {opt_undef = 0, opt_yes, opt_no};
40
41 /**
42  * struct opts - Values from command line options.
43  */
44
45 struct opts {
46         enum opt_value no_autoboot;
47         enum opt_value show_help;
48         const char *log_file;
49         enum opt_value dry_run;
50         enum opt_value show_version;
51 };
52
53 /**
54  * opts_parse - Parse the command line options.
55  */
56
57 static int opts_parse(struct opts *opts, int argc, char *argv[])
58 {
59         static const struct option long_options[] = {
60                 {"no-autoboot",    no_argument,       NULL, 'a'},
61                 {"help",           no_argument,       NULL, 'h'},
62                 {"log",            required_argument, NULL, 'l'},
63                 {"dry-run",        no_argument,       NULL, 'n'},
64                 {"version",        no_argument,       NULL, 'V'},
65                 { NULL, 0, NULL, 0},
66         };
67         static const char short_options[] = "ahl:nV";
68         static const struct opts default_values = {
69                 .no_autoboot = opt_no,
70                 .log_file = "/var/log/petitboot/pb-discover.log",
71                 .dry_run = opt_no,
72         };
73
74         *opts = default_values;
75
76         while (1) {
77                 int c = getopt_long(argc, argv, short_options, long_options,
78                         NULL);
79
80                 if (c == EOF)
81                         break;
82
83                 switch (c) {
84                 case 'a':
85                         opts->no_autoboot = opt_yes;
86                         break;
87                 case 'h':
88                         opts->show_help = opt_yes;
89                         break;
90                 case 'l':
91                         opts->log_file = optarg;
92                         break;
93                 case 'n':
94                         opts->dry_run = opt_yes;
95                         break;
96                 case 'V':
97                         opts->show_version = opt_yes;
98                         break;
99                 default:
100                         opts->show_help = opt_yes;
101                         return -1;
102                 }
103         }
104
105         return optind != argc;
106 }
107
108 static int running;
109
110 static void sigint_handler(int __attribute__((unused)) signum)
111 {
112         running = 0;
113 }
114
115 int main(int argc, char *argv[])
116 {
117         struct device_handler *handler;
118         struct discover_server *server;
119         struct waitset *waitset;
120         struct procset *procset;
121         struct opts opts;
122         FILE *log;
123
124         if (opts_parse(&opts, argc, argv)) {
125                 print_usage();
126                 return EXIT_FAILURE;
127         }
128
129         if (opts.show_help == opt_yes) {
130                 print_usage();
131                 return EXIT_SUCCESS;
132         }
133
134         if (opts.show_version == opt_yes) {
135                 print_version();
136                 return EXIT_SUCCESS;
137         }
138
139         log = stderr;
140         if (strcmp(opts.log_file, "-")) {
141                 log = fopen(opts.log_file, "a");
142                 if (!log) {
143                         fprintf(stderr, "can't open log file %s, logging to "
144                                         "stderr\n", opts.log_file);
145                         log = stderr;
146                 }
147         }
148         pb_log_init(log);
149
150         pb_log("--- pb-discover ---\n");
151
152         /* we look for closed sockets when we write, so ignore SIGPIPE */
153         signal(SIGPIPE, SIG_IGN);
154
155         signal(SIGINT, sigint_handler);
156
157         waitset = waitset_create(NULL);
158
159         server = discover_server_init(waitset);
160         if (!server)
161                 return EXIT_FAILURE;
162
163         procset = process_init(server, waitset, opts.dry_run == opt_yes);
164         if (!procset)
165                 return EXIT_FAILURE;
166
167         platform_init(NULL);
168         if (opts.no_autoboot == opt_yes)
169                 config_set_autoboot(false);
170
171         system_info_init(server);
172
173         handler = device_handler_init(server, waitset, opts.dry_run == opt_yes);
174         if (!handler)
175                 return EXIT_FAILURE;
176
177         discover_server_set_device_source(server, handler);
178
179         for (running = 1; running;) {
180                 if (waiter_poll(waitset))
181                         break;
182         }
183
184         device_handler_destroy(handler);
185         discover_server_destroy(server);
186         platform_fini();
187         talloc_free(waitset);
188
189         pb_log("--- end ---\n");
190
191         if (log != stderr)
192                 fclose(log);
193
194         return EXIT_SUCCESS;
195 }