Accept SRC:DST remap syntax in --ro/--rw

src/lib.rs

@@ -35,14 +35,20 @@ impl EnvEntry {
     }
 }
 
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct BindSpec {
+    pub source: PathBuf,
+    pub target: PathBuf,
+}
+
 pub struct SandboxConfig {
     pub mode: SandboxMode,
     pub hardened: bool,
     pub unshare_net: bool,
     pub seccomp: bool,
     pub env_filter: bool,
-    pub extra_rw: Vec<PathBuf>,
-    pub extra_ro: Vec<PathBuf>,
+    pub extra_rw: Vec<BindSpec>,
+    pub extra_ro: Vec<BindSpec>,
     pub mask: Vec<PathBuf>,
     pub env: Vec<EnvEntry>,
     pub unsetenv: Vec<String>,