linux: add PIDFD_NONBLOCK and organize pidfd constants

Author: raushan728

src/unix/linux_like/linux/mod.rs

@@ -1600,32 +1600,29 @@ pub const NS_MNT_GET_NEXT: Ioctl = _IOR::<mnt_ns_info>(NSIO, 11);
 pub const NS_MNT_GET_PREV: Ioctl = _IOR::<mnt_ns_info>(NSIO, 12);
 
 // linux/pidfd.h
-pub const PIDFD_NONBLOCK: c_uint = O_NONBLOCK as c_uint;
-pub const PIDFD_THREAD: c_uint = O_EXCL as c_uint;
-
-pub const PIDFD_SIGNAL_THREAD: c_uint = 1 << 0;
-pub const PIDFD_SIGNAL_THREAD_GROUP: c_uint = 1 << 1;
-pub const PIDFD_SIGNAL_PROCESS_GROUP: c_uint = 1 << 2;
-
-pub const PIDFD_INFO_PID: c_uint = 1 << 0;
-pub const PIDFD_INFO_CREDS: c_uint = 1 << 1;
-pub const PIDFD_INFO_CGROUPID: c_uint = 1 << 2;
-pub const PIDFD_INFO_EXIT: c_uint = 1 << 3;
-
-pub const PIDFD_INFO_SIZE_VER0: c_uint = 64;
-
 const PIDFS_IOCTL_MAGIC: c_uint = 0xFF;
+
 pub const PIDFD_GET_CGROUP_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 1);
+pub const PIDFD_GET_INFO: Ioctl = _IOWR::<pidfd_info>(PIDFS_IOCTL_MAGIC, 11);
 pub const PIDFD_GET_IPC_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 2);
 pub const PIDFD_GET_MNT_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 3);
 pub const PIDFD_GET_NET_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 4);
-pub const PIDFD_GET_PID_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 5);
 pub const PIDFD_GET_PID_FOR_CHILDREN_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 6);
-pub const PIDFD_GET_TIME_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 7);
+pub const PIDFD_GET_PID_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 5);
 pub const PIDFD_GET_TIME_FOR_CHILDREN_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 8);
+pub const PIDFD_GET_TIME_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 7);
 pub const PIDFD_GET_USER_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 9);
 pub const PIDFD_GET_UTS_NAMESPACE: Ioctl = _IO(PIDFS_IOCTL_MAGIC, 10);
-pub const PIDFD_GET_INFO: Ioctl = _IOWR::<pidfd_info>(PIDFS_IOCTL_MAGIC, 11);
+pub const PIDFD_INFO_CGROUPID: c_uint = 1 << 2;
+pub const PIDFD_INFO_CREDS: c_uint = 1 << 1;
+pub const PIDFD_INFO_EXIT: c_uint = 1 << 3;
+pub const PIDFD_INFO_PID: c_uint = 1 << 0;
+pub const PIDFD_INFO_SIZE_VER0: c_uint = 64;
+pub const PIDFD_NONBLOCK: crate::c_int = 0x00000800;
+pub const PIDFD_SIGNAL_PROCESS_GROUP: c_uint = 1 << 2;
+pub const PIDFD_SIGNAL_THREAD: c_uint = 1 << 0;
+pub const PIDFD_SIGNAL_THREAD_GROUP: c_uint = 1 << 1;
+pub const PIDFD_THREAD: c_uint = O_EXCL as c_uint;
 
 pub const PR_SET_MDWE: c_int = 65;
 pub const PR_GET_MDWE: c_int = 66;