utils: add a len argument to get_current_timestamp

Signed-off-by: Giuseppe Scrivano <[email protected]>

Author: giuseppe

src/libcrun/container.c

@@ -1683,7 +1683,7 @@ write_container_status (libcrun_container_t *container, libcrun_context_t *conte
     .scope = NULL,
   };
 
-  get_current_timestamp (created);
+  get_current_timestamp (created, sizeof (created));
 
   if (cwd == NULL)
     OOM ();

src/libcrun/utils.c

@@ -1605,7 +1605,7 @@ mark_or_close_fds_ge_than (int n, bool close_now, libcrun_error_t *err)
 }
 
 void
-get_current_timestamp (char *out)
+get_current_timestamp (char *out, size_t len)
 {
   struct timeval tv;
   struct tm now;
@@ -1615,7 +1615,8 @@ get_current_timestamp (char *out)
   gmtime_r (&tv.tv_sec, &now);
   strftime (timestamp, sizeof (timestamp), "%Y-%m-%dT%H:%M:%S", &now);
 
-  sprintf (out, "%s.%09ldZ", timestamp, tv.tv_usec);
+  snprintf (out, len, "%s.%09ldZ", timestamp, tv.tv_usec);
+  out[len - 1] = '\0';
 }
 
 int

src/libcrun/utils.h

@@ -302,7 +302,7 @@ int run_process_with_stdin_timeout_envp (char *path, char **args, const char *cw
 
 int mark_or_close_fds_ge_than (int n, bool close_now, libcrun_error_t *err);
 
-void get_current_timestamp (char *out);
+void get_current_timestamp (char *out, size_t len);
 
 int set_blocking_fd (int fd, int blocking, libcrun_error_t *err);