restore: Drop self-vmas file once it's not needed

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

cr-restore.c

@@ -1295,6 +1295,7 @@ static void sigreturn_restore(pid_t pstree_pid, pid_t pid)
 	struct task_restore_core_args *task_args;
 	struct thread_restore_args *thread_args;
 
+	char self_vmas_path[64];
 	char path[64];
 
 	LIST_HEAD(self_vma_list);
@@ -1334,9 +1335,9 @@ static void sigreturn_restore(pid_t pstree_pid, pid_t pid)
 		goto err;
 	}
 
-	snprintf(path, sizeof(path), FMT_FNAME_VMAS, getpid());
-	unlink(path);
-	fd_self_vmas = open(path, O_CREAT | O_RDWR, CR_FD_PERM);
+	snprintf(self_vmas_path, sizeof(self_vmas_path), FMT_FNAME_VMAS, getpid());
+	unlink(self_vmas_path);
+	fd_self_vmas = open(self_vmas_path, O_CREAT | O_RDWR, CR_FD_PERM);
 	if (fd_self_vmas < 0) {
 		pr_perror("Can't open %s\n", path);
 		goto err;
@@ -1453,6 +1454,9 @@ static void sigreturn_restore(pid_t pstree_pid, pid_t pid)
 	task_args->pid		= pid;
 	task_args->fd_core	= fd_core;
 	task_args->fd_self_vmas	= fd_self_vmas;
+	strncpy(task_args->self_vmas_path,
+		self_vmas_path,
+		sizeof(task_args->self_vmas_path));
 
 	rst_mutex_init(&task_args->rst_lock);
 

include/restorer.h

@@ -65,6 +65,7 @@ struct task_restore_core_args {
 	int				pid;			/* task pid */
 	int				fd_core;		/* opened core file */
 	int				fd_self_vmas;		/* opened file with running VMAs to unmap */
+	char				self_vmas_path[64];	/* path to it, to unlink it once we're done */
 	bool				restore_threads;	/* if to restore threads */
 	rst_mutex_t			rst_lock;
 

restorer.c

@@ -201,6 +201,7 @@ self_len_end:
 		}
 
 		sys_close(args->fd_self_vmas);
+		sys_unlink(args->self_vmas_path);
 
 		/*
 		 * OK, lets try to map new one.