--- Linux-Clone/Clone.xs	2017/11/07 18:15:29	1.4
+++ Linux-Clone/Clone.xs	2022/09/03 23:56:10	1.7
@@ -11,6 +11,13 @@
 #include <unistd.h>
 #include <sys/syscall.h>
 
+#include <sched.h>
+
+#include <sys/ioctl.h>
+#include <net/if.h>
+
+#include <linux/nsfs.h>
+
 #ifdef __has_include
   #if !__has_include("linux/kcmp.h") // use "" as GCC wrongly expands macros
     #undef SYS_kcmp
@@ -78,6 +85,9 @@
   } *civ, const_iv[] = {
 #   define const_iv(name)       { # name, (IV)name },
 #   define const_iv_clone(name) { # name, (IV) CLONE_ ## name },
+#   ifdef CSIGNAL
+      const_iv (CSIGNAL)
+#   endif
 #   ifdef CLONE_FILES
       const_iv_clone (FILES)
 #   endif
@@ -144,6 +154,9 @@
 #   ifdef CLONE_NEWCGROUP
       const_iv_clone (NEWCGROUP)
 #   endif
+#   ifdef CLONE_PIDFD
+      const_iv_clone (PIDFD)
+#   endif
 #   ifdef SYS_kcmp
       const_iv (KCMP_FILE)
       const_iv (KCMP_VM)
@@ -154,6 +167,18 @@
       const_iv (KCMP_SYSVSEM)
       const_iv (KCMP_FILE)
 #   endif
+#   ifdef NS_GET_USERNS
+      const_iv (NS_GET_USERNS)
+#   endif
+#   ifdef NS_GET_PARENT
+      const_iv (NS_GET_PARENT)
+#   endif
+#   ifdef NS_GET_NSTYPE
+      const_iv (NS_GET_NSTYPE)
+#   endif
+#   ifdef NS_OWNER_UID
+      const_iv (NS_OWNER_UID
+#   endif
   };
 
   for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
@@ -190,8 +215,7 @@
               }
           }
 }
-	OUTPUT:
-        RETVAL
+	OUTPUT: RETVAL
 
 int
 unshare (int flags)
@@ -206,9 +230,23 @@
         RETVAL = syscall (SYS_pivot_root,
                           (const char *)SvPVbyte_nolen (new_root),
                           (const char *)SvPVbyte_nolen (old_root));
-	OUTPUT:
-        RETVAL
+	OUTPUT: RETVAL
 
 int
 kcmp (IV pid1, IV pid2, IV type, UV idx1 = 0, UV idx2 = 0)
 
+int
+siocsifflags (char *ifname, U32 flags = IFF_UP)
+	CODE:
+{
+        int saved_errno;
+	struct ifreq ifr;
+	int fd = socket (AF_INET, SOCK_DGRAM, 0);
+        strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+        RETVAL = ioctl (fd, SIOCSIFFLAGS, &ifr);
+        saved_errno = errno;
+        close (fd);
+        errno = saved_errno;
+}
+	OUTPUT: RETVAL
+