Improve init's debug printing.

+ Make prints of rc commands significantly more verbose. All commands
  will log all arguments, file/line number of the command, return value,
  and parent action which triggered the command.

init: command 'mount tmpfs tmpfs /mnt/obb mode=0755,gid=1000' action=init
      status=0 (/init.rc:89)
init: command 'setprop net.tcp.default_init_rwnd 60' action=boot status=0
      (/init.rc:403)

Change-Id: I5498c7258e4891706be4a12546df4231d14d86c4

init/init.c

@@ -528,7 +528,8 @@ static int is_last_command(struct action *act, struct command *cmd)
 
 void execute_one_command(void)
 {
-    int ret;
+    int ret, i;
+    char cmd_str[256] = "";
 
     if (!cur_action || !cur_command || is_last_command(cur_action, cur_command)) {
         cur_action = action_remove_queue_head();
@@ -545,7 +546,17 @@ void execute_one_command(void)
         return;
 
     ret = cur_command->func(cur_command->nargs, cur_command->args);
-    INFO("command '%s' r=%d\n", cur_command->args[0], ret);
+    if (klog_get_level() >= KLOG_INFO_LEVEL) {
+        for (i = 0; i < cur_command->nargs; i++) {
+            strlcat(cmd_str, cur_command->args[i], sizeof(cmd_str));
+            if (i < cur_command->nargs - 1) {
+                strlcat(cmd_str, " ", sizeof(cmd_str));
+            }
+        }
+        INFO("command '%s' action=%s status=%d (%s:%d)\n",
+             cmd_str, cur_action ? cur_action->name : "", ret, cur_command->filename,
+             cur_command->line);
+    }
 }
 
 static int wait_for_coldboot_done_action(int nargs, char **args)

init/init.h

@@ -29,10 +29,14 @@ struct command
     struct listnode clist;
 
     int (*func)(int nargs, char **args);
+
+    int line;
+    const char *filename;
+
     int nargs;
     char *args[1];
 };
-    
+
 struct action {
         /* node in list of all actions */
     struct listnode alist;
@@ -43,7 +47,7 @@ struct action {
 
     unsigned hash;
     const char *name;
-    
+
     struct listnode commands;
     struct command *current;
 };

init/init_parser.c

@@ -584,6 +584,7 @@ void queue_builtin_action(int (*func)(int nargs, char **args), char *name)
     cmd = calloc(1, sizeof(*cmd));
     cmd->func = func;
     cmd->args[0] = name;
+    cmd->nargs = 1;
     list_add_tail(&act->commands, &cmd->clist);
 
     list_add_tail(&action_list, &act->alist);
@@ -870,6 +871,8 @@ static void parse_line_action(struct parse_state* state, int nargs, char **args)
     }
     cmd = malloc(sizeof(*cmd) + sizeof(char*) * nargs);
     cmd->func = kw_func(kw);
+    cmd->line = state->line;
+    cmd->filename = state->filename;
     cmd->nargs = nargs;
     memcpy(cmd->args, args, sizeof(char*) * nargs);
     list_add_tail(&act->commands, &cmd->clist);