add some traces in the code for the logger

src/lxc/cgroup.c

@@ -74,6 +74,8 @@ static int get_cgroup_mount(const char *mtab, char *mnt)
 		}
         };
 
+	DEBUG("using cgroup mounted at '%s'", mnt);
+
         fclose(file);
 out:
         return err;
@@ -108,6 +110,9 @@ int lxc_rename_nsgroup(const char *name, pid_t pid)
 	ret = rename(oldname, newname);
 	if (ret)
 		SYSERROR("failed to rename cgroup %s->%s", oldname, newname);
+	else
+		DEBUG("'%s' renamed to '%s'", oldname, newname);
+
 	return ret;
 }
 
@@ -130,7 +135,10 @@ int lxc_link_nsgroup(const char *name)
 	ret = symlink(nsgroup, lxc);
 	if (ret)
 		SYSERROR("failed to create symlink %s->%s", nsgroup, lxc);
-      return ret;
+	else
+		DEBUG("'%s' linked to '%s'", nsgroup, lxc);
+
+	return ret;
 }
 
 int lxc_unlink_nsgroup(const char *name)
@@ -147,6 +155,8 @@ int lxc_unlink_nsgroup(const char *name)
 		rmdir(path);
 	}
 
+	DEBUG("unlinking '%s'", nsgroup);
+
 	return unlink(nsgroup);
 }
 

src/lxc/conf.c

@@ -1779,6 +1779,9 @@ int lxc_create_tty(const char *name, struct lxc_tty_info *tty_info)
 	}
 
 	ret = 0;
+
+	INFO("tty's configured");
+
 out:
 	return ret;
 

src/lxc/start.c

@@ -136,6 +136,8 @@ static int setup_sigchld_fd(sigset_t *oldmask)
 		return -1;
 	}
 
+	DEBUG("sigchild handler set");
+
 	return fd;
 }
 
@@ -166,6 +168,8 @@ static int setup_tty_service(const char *name, int *ttyfd)
 static int sigchld_handler(int fd, void *data, 
 			   struct lxc_epoll_descr *descr)
 {
+	DEBUG("child exited");
+
 	return 1;
 }
 
@@ -381,6 +385,9 @@ static int console_init(char *console, size_t size)
 	}
 
 	console[0] = '\0';
+
+	DEBUG("console initialized");
+
 	return 0;
 }
 
@@ -428,6 +435,9 @@ struct lxc_handler *lxc_init(const char *name)
 	LXC_TTY_ADD_HANDLER(SIGQUIT);
 
 out:
+	if (handler)
+		INFO("'%s' is initialized", name);
+
 	return handler;
 
 out_delete_tty:
@@ -517,6 +527,8 @@ static int do_start(void *arg)
 		goto out_child;
 	}
 
+	NOTICE("exec'ing '%s'", argv[0]);
+
 	execvp(argv[0], argv);
 	SYSERROR("failed to exec %s", argv[0]);
 
@@ -601,6 +613,8 @@ int lxc_spawn(const char *name, struct lxc_handler *handler, char *const argv[])
 
 	err = 0;
 
+	NOTICE("'%s' started with pid '%d'", argv[0], handler->pid);
+
 out_close:
 	close(sv[0]);
 	close(sv[1]);

src/lxc/state.c

@@ -93,6 +93,8 @@ int lxc_setstate(const char *name, lxc_state_t state)
 	}
 
 	err = 0;
+
+	DEBUG("set state to '%s'", str);
 out:
 	close(fd);