interface: report link up events for force_link interfaces
[project/netifd.git] / main.c
diff --git a/main.c b/main.c
index fe97ee1..5717b81 100644 (file)
--- a/main.c
+++ b/main.c
+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program 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.
+ */
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <getopt.h>
-#include <unistd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <syslog.h>
 
 #include "netifd.h"
 #include "ubus.h"
 #include "config.h"
 #include "system.h"
 #include "interface.h"
+#include "wireless.h"
+#include "proto.h"
 
-const char *main_path = ".";
+unsigned int debug_mask = 0;
+const char *main_path = DEFAULT_MAIN_PATH;
+const char *config_path = DEFAULT_CONFIG_PATH;
+const char *resolv_conf = DEFAULT_RESOLV_CONF;
 static char **global_argv;
 
-static void netifd_do_restart(struct uloop_timeout *timeout)
+static struct list_head process_list = LIST_HEAD_INIT(process_list);
+
+#define DEFAULT_LOG_LEVEL L_NOTICE
+
+static int log_level = DEFAULT_LOG_LEVEL;
+static const int log_class[] = {
+       [L_CRIT] = LOG_CRIT,
+       [L_WARNING] = LOG_WARNING,
+       [L_NOTICE] = LOG_NOTICE,
+       [L_INFO] = LOG_INFO,
+       [L_DEBUG] = LOG_DEBUG
+};
+
+#ifdef DUMMY_MODE
+#define use_syslog false
+#else
+static bool use_syslog = true;
+#endif
+
+
+static void
+netifd_delete_process(struct netifd_process *proc)
 {
-       execvp(global_argv[0], global_argv);
+       list_del(&proc->list);
+       ustream_free(&proc->log.stream);
+       close(proc->log.fd.fd);
+}
+
+void
+netifd_log_message(int priority, const char *format, ...)
+{
+       va_list vl;
+
+       if (priority > log_level)
+               return;
+
+       va_start(vl, format);
+       if (use_syslog)
+               vsyslog(log_class[priority], format, vl);
+       else
+               vfprintf(stderr, format, vl);
+       va_end(vl);
+}
+
+static void
+netifd_process_log_read_cb(struct ustream *s, int bytes)
+{
+       struct netifd_process *proc;
+       const char *log_prefix;
+       char *data;
+       int len = 0;
+
+       proc = container_of(s, struct netifd_process, log.stream);
+       log_prefix = proc->log_prefix;
+       if (!log_prefix)
+               log_prefix = "process";
+
+       do {
+               char *newline;
+
+               data = ustream_get_read_buf(s, &len);
+               if (!len)
+                       break;
+
+               newline = strchr(data, '\n');
+
+               if (proc->log_overflow) {
+                       if (newline) {
+                               len = newline + 1 - data;
+                               proc->log_overflow = false;
+                       }
+               } else if (newline) {
+                       *newline = 0;
+                       len = newline + 1 - data;
+                       netifd_log_message(L_NOTICE, "%s (%d): %s\n",
+                               log_prefix, proc->uloop.pid, data);
+               } else if (len == s->r.buffer_len) {
+                       netifd_log_message(L_NOTICE, "%s (%d): %s [...]\n",
+                               log_prefix, proc->uloop.pid, data);
+                       proc->log_overflow = true;
+               } else
+                       break;
+
+               ustream_consume(s, len);
+       } while (1);
 }
 
-static void netifd_do_reload(struct uloop_timeout *timeout)
+static void
+netifd_process_cb(struct uloop_process *proc, int ret)
 {
-       config_init_interfaces(NULL);
+       struct netifd_process *np;
+       np = container_of(proc, struct netifd_process, uloop);
+
+       while (ustream_poll(&np->log.stream));
+       netifd_delete_process(np);
+       return np->cb(np, ret);
 }
 
-static struct uloop_timeout main_timer;
+int
+netifd_start_process(const char **argv, char **env, struct netifd_process *proc)
+{
+       int pfds[2];
+       int pid;
+
+       netifd_kill_process(proc);
+
+       if (pipe(pfds) < 0)
+               return -1;
+
+       if ((pid = fork()) < 0)
+               goto error;
+
+       if (!pid) {
+               int i;
+
+               if (env) {
+                       while (*env) {
+                               putenv(*env);
+                               env++;
+                       }
+               }
+               if (proc->dir_fd >= 0)
+                       if (fchdir(proc->dir_fd)) {}
+
+               close(pfds[0]);
+
+               for (i = 0; i <= 2; i++) {
+                       if (pfds[1] == i)
+                               continue;
+
+                       dup2(pfds[1], i);
+               }
+
+               if (pfds[1] > 2)
+                       close(pfds[1]);
+
+               execvp(argv[0], (char **) argv);
+               exit(127);
+       }
+
+       close(pfds[1]);
+       proc->uloop.cb = netifd_process_cb;
+       proc->uloop.pid = pid;
+       uloop_process_add(&proc->uloop);
+       list_add_tail(&proc->list, &process_list);
+
+       system_fd_set_cloexec(pfds[0]);
+       proc->log.stream.string_data = true;
+       proc->log.stream.notify_read = netifd_process_log_read_cb;
+       ustream_fd_init(&proc->log, pfds[0]);
+
+       return 0;
+
+error:
+       close(pfds[0]);
+       close(pfds[1]);
+       return -1;
+}
+
+void
+netifd_kill_process(struct netifd_process *proc)
+{
+       if (!proc->uloop.pending)
+               return;
+
+       kill(proc->uloop.pid, SIGKILL);
+       uloop_process_delete(&proc->uloop);
+       netifd_delete_process(proc);
+}
+
+static void netifd_do_restart(struct uloop_timeout *timeout)
+{
+       execvp(global_argv[0], global_argv);
+}
 
 void netifd_reload(void)
 {
-       main_timer.cb = netifd_do_reload;
-       uloop_timeout_set(&main_timer, 100);
+       config_init_all();
 }
 
 void netifd_restart(void)
 {
-       main_timer.cb = netifd_do_restart;
+       static struct uloop_timeout main_timer = {
+               .cb = netifd_do_restart
+       };
+
        interface_set_down(NULL);
        uloop_timeout_set(&main_timer, 1000);
 }
@@ -42,13 +227,52 @@ static int usage(const char *progname)
 {
        fprintf(stderr, "Usage: %s [options]\n"
                "Options:\n"
+               " -d <mask>:            Mask for debug messages\n"
                " -s <path>:            Path to the ubus socket\n"
                " -p <path>:            Path to netifd addons (default: %s)\n"
-               "\n", progname, main_path);
+               " -c <path>:            Path to UCI configuration\n"
+               " -h <path>:            Path to the hotplug script\n"
+               " -r <path>:            Path to resolv.conf\n"
+               " -l <level>:           Log output level (default: %d)\n"
+               " -S:                   Use stderr instead of syslog for log messages\n"
+               "                       (default: "DEFAULT_HOTPLUG_PATH")\n"
+               "\n", progname, main_path, DEFAULT_LOG_LEVEL);
 
        return 1;
 }
 
+static void
+netifd_handle_signal(int signo)
+{
+       uloop_end();
+}
+
+static void
+netifd_setup_signals(void)
+{
+       struct sigaction s;
+
+       memset(&s, 0, sizeof(s));
+       s.sa_handler = netifd_handle_signal;
+       s.sa_flags = 0;
+       sigaction(SIGINT, &s, NULL);
+       sigaction(SIGTERM, &s, NULL);
+       sigaction(SIGUSR1, &s, NULL);
+       sigaction(SIGUSR2, &s, NULL);
+
+       s.sa_handler = SIG_IGN;
+       sigaction(SIGPIPE, &s, NULL);
+}
+
+static void
+netifd_kill_processes(void)
+{
+       struct netifd_process *proc, *tmp;
+
+       list_for_each_entry_safe(proc, tmp, &process_list, list)
+               netifd_kill_process(proc);
+}
+
 int main(int argc, char **argv)
 {
        const char *socket = NULL;
@@ -56,34 +280,67 @@ int main(int argc, char **argv)
 
        global_argv = argv;
 
-       while ((ch = getopt(argc, argv, "s:")) != -1) {
+       while ((ch = getopt(argc, argv, "d:s:p:c:h:r:l:S")) != -1) {
                switch(ch) {
+               case 'd':
+                       debug_mask = strtoul(optarg, NULL, 0);
+                       break;
                case 's':
                        socket = optarg;
                        break;
                case 'p':
                        main_path = optarg;
                        break;
+               case 'c':
+                       config_path = optarg;
+                       break;
+               case 'h':
+                       hotplug_cmd_path = optarg;
+                       break;
+               case 'r':
+                       resolv_conf = optarg;
+                       break;
+               case 'l':
+                       log_level = atoi(optarg);
+                       if (log_level >= ARRAY_SIZE(log_class))
+                               log_level = ARRAY_SIZE(log_class) - 1;
+                       break;
+#ifndef DUMMY_MODE
+               case 'S':
+                       use_syslog = false;
+                       break;
+#endif
                default:
                        return usage(argv[0]);
                }
        }
 
+       if (use_syslog)
+               openlog("netifd", 0, LOG_DAEMON);
+
+       netifd_setup_signals();
        if (netifd_ubus_init(socket) < 0) {
                fprintf(stderr, "Failed to connect to ubus\n");
                return 1;
        }
 
+       proto_shell_init();
+       wireless_init();
+
        if (system_init()) {
                fprintf(stderr, "Failed to initialize system control\n");
                return 1;
        }
 
-       config_init_interfaces(NULL);
+       config_init_all();
 
        uloop_run();
+       netifd_kill_processes();
 
        netifd_ubus_done();
 
+       if (use_syslog)
+               closelog();
+
        return 0;
 }