procd.c

  1 /*
  2  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
  3  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
  4  *
  5  * This program is free software; you can redistribute it and/or modify
  6  * it under the terms of the GNU Lesser General Public License version 2.1
  7  * as published by the Free Software Foundation
  8  *
  9  * This program is distributed in the hope that it will be useful,
 10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12  * GNU General Public License for more details.
 13  */
 14 
 15 #include <sys/wait.h>
 16 #include <sys/types.h>
 17 #include <sys/stat.h>
 18 #include <sys/reboot.h>
 19 
 20 #include <unistd.h>
 21 #include <getopt.h>
 22 #include <libgen.h>
 23 
 24 #include "procd.h"
 25 #include "watchdog.h"
 26 #include "plug/hotplug.h"
 27 
 28 unsigned int debug;
 29 
 30 static struct udebug ud;
 31 static struct udebug_buf udb;
 32 static bool udebug_enabled;
 33 
 34 static void procd_udebug_vprintf(const char *format, va_list ap)
 35 {
 36         if (!udebug_enabled)
 37                 return;
 38 
 39         udebug_entry_init(&udb);
 40         udebug_entry_vprintf(&udb, format, ap);
 41         udebug_entry_add(&udb);
 42 }
 43 
 44 void procd_udebug_printf(const char *format, ...)
 45 {
 46         va_list ap;
 47 
 48         va_start(ap, format);
 49         procd_udebug_vprintf(format, ap);
 50         va_end(ap);
 51 }
 52 
 53 void procd_udebug_set_enabled(bool val)
 54 {
 55         static const struct udebug_buf_meta meta = {
 56                 .name = "procd_log",
 57                 .format = UDEBUG_FORMAT_STRING,
 58         };
 59 
 60         if (udebug_enabled == val)
 61                 return;
 62 
 63         udebug_enabled = val;
 64         if (!val) {
 65                 ulog_udebug(NULL);
 66                 udebug_buf_free(&udb);
 67                 udebug_free(&ud);
 68                 return;
 69         }
 70 
 71         udebug_init(&ud);
 72         udebug_auto_connect(&ud, NULL);
 73         udebug_buf_init(&udb, 1024, 64 * 1024);
 74         udebug_buf_add(&ud, &udb, &meta);
 75         ulog_udebug(&udb);
 76 }
 77 
 78 
 79 static int usage(const char *prog)
 80 {
 81         fprintf(stderr, "Usage: %s [options]\n"
 82                 "Options:\n"
 83                 "       -s <path>       Path to ubus socket\n"
 84                 "       -h <path>       run as hotplug daemon\n"
 85                 "       -d <level>      Enable debug messages\n"
 86                 "       -S              Print messages to stdout\n"
 87                 "\n", prog);
 88         return 1;
 89 }
 90 
 91 int main(int argc, char **argv)
 92 {
 93         int ch;
 94         char *dbglvl = getenv("DBGLVL");
 95         int ulog_channels = ULOG_KMSG;
 96 
 97         if (dbglvl) {
 98                 debug = atoi(dbglvl);
 99                 unsetenv("DBGLVL");
100         }
101 
102         while ((ch = getopt(argc, argv, "d:s:h:S")) != -1) {
103                 switch (ch) {
104                 case 'h':
105                         return hotplug_run(optarg);
106                 case 's':
107                         ubus_socket = optarg;
108                         break;
109                 case 'd':
110                         debug = atoi(optarg);
111                         break;
112                 case 'S':
113                         ulog_channels = ULOG_STDIO;
114                         break;
115                 default:
116                         return usage(argv[0]);
117                 }
118         }
119 
120         ulog_open(ulog_channels, LOG_DAEMON, "procd");
121         ulog_threshold(LOG_DEBUG + 1);
122 
123         setsid();
124         uloop_init();
125         procd_signal();
126         procd_udebug_set_enabled(true);
127         if (getpid() != 1)
128                 procd_connect_ubus();
129         else
130                 procd_state_next();
131         uloop_run();
132         uloop_done();
133 
134         return 0;
135 }
136
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Sources/procd/procd.c
