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    //! Linux-specific definitions for linux-like values

    use dox::mem;

    pub type useconds_t = u32;
    pub type dev_t = u64;
    pub type socklen_t = u32;
    pub type pthread_t = c_ulong;
    pub type mode_t = u32;
    pub type ino64_t = u64;
    pub type off64_t = i64;
    pub type blkcnt64_t = i64;
    pub type rlim64_t = u64;
    pub type shmatt_t = ::c_ulong;
    pub type mqd_t = ::c_int;
    pub type msgqnum_t = ::c_ulong;
    pub type msglen_t = ::c_ulong;
    pub type nfds_t = ::c_ulong;
    pub type nl_item = ::c_int;

    pub enum fpos64_t {} // TODO: fill this out with a struct

    s! {
        pub struct dirent {
            pub d_ino: ::ino_t,
            pub d_off: ::off_t,
            pub d_reclen: ::c_ushort,
            pub d_type: ::c_uchar,
            pub d_name: [::c_char; 256],
        }

        pub struct dirent64 {
            pub d_ino: ::ino64_t,
            pub d_off: ::off64_t,
            pub d_reclen: ::c_ushort,
            pub d_type: ::c_uchar,
            pub d_name: [::c_char; 256],
        }

        pub struct rlimit64 {
            pub rlim_cur: rlim64_t,
            pub rlim_max: rlim64_t,
        }

        pub struct glob_t {
            pub gl_pathc: ::size_t,
            pub gl_pathv: *mut *mut c_char,
            pub gl_offs: ::size_t,
            pub gl_flags: ::c_int,

            __unused1: *mut ::c_void,
            __unused2: *mut ::c_void,
            __unused3: *mut ::c_void,
            __unused4: *mut ::c_void,
            __unused5: *mut ::c_void,
        }

        pub struct ifaddrs {
            pub ifa_next: *mut ifaddrs,
            pub ifa_name: *mut c_char,
            pub ifa_flags: ::c_uint,
            pub ifa_addr: *mut ::sockaddr,
            pub ifa_netmask: *mut ::sockaddr,
            pub ifa_ifu: *mut ::sockaddr, // FIXME This should be a union
            pub ifa_data: *mut ::c_void
        }

        pub struct pthread_mutex_t {
            #[cfg(any(target_arch = "mips", target_arch = "arm",
                      target_arch = "powerpc"))]
            __align: [::c_long; 0],
            #[cfg(not(any(target_arch = "mips", target_arch = "arm",
                          target_arch = "powerpc")))]
            __align: [::c_longlong; 0],
            size: [u8; __SIZEOF_PTHREAD_MUTEX_T],
        }

        pub struct pthread_rwlock_t {
            #[cfg(any(target_arch = "mips", target_arch = "arm",
                      target_arch = "powerpc"))]
            __align: [::c_long; 0],
            #[cfg(not(any(target_arch = "mips", target_arch = "arm",
                          target_arch = "powerpc")))]
            __align: [::c_longlong; 0],
            size: [u8; __SIZEOF_PTHREAD_RWLOCK_T],
        }

        pub struct pthread_mutexattr_t {
            #[cfg(any(target_arch = "x86_64", target_arch = "powerpc64",
                      target_arch = "mips64", target_arch = "s390x"))]
            __align: [::c_int; 0],
            #[cfg(not(any(target_arch = "x86_64", target_arch = "powerpc64",
                          target_arch = "mips64", target_arch = "s390x")))]
            __align: [::c_long; 0],
            size: [u8; __SIZEOF_PTHREAD_MUTEXATTR_T],
        }

        pub struct pthread_cond_t {
            #[cfg(any(target_env = "musl"))]
            __align: [*const ::c_void; 0],
            #[cfg(not(any(target_env = "musl")))]
            __align: [::c_longlong; 0],
            size: [u8; __SIZEOF_PTHREAD_COND_T],
        }

        pub struct pthread_condattr_t {
            __align: [::c_int; 0],
            size: [u8; __SIZEOF_PTHREAD_CONDATTR_T],
        }

        pub struct passwd {
            pub pw_name: *mut ::c_char,
            pub pw_passwd: *mut ::c_char,
            pub pw_uid: ::uid_t,
            pub pw_gid: ::gid_t,
            pub pw_gecos: *mut ::c_char,
            pub pw_dir: *mut ::c_char,
            pub pw_shell: *mut ::c_char,
        }

        pub struct spwd {
            pub sp_namp: *mut ::c_char,
            pub sp_pwdp: *mut ::c_char,
            pub sp_lstchg: ::c_long,
            pub sp_min: ::c_long,
            pub sp_max: ::c_long,
            pub sp_warn: ::c_long,
            pub sp_inact: ::c_long,
            pub sp_expire: ::c_long,
            pub sp_flag: ::c_ulong,
        }

        pub struct statvfs {
            pub f_bsize: ::c_ulong,
            pub f_frsize: ::c_ulong,
            pub f_blocks: ::fsblkcnt_t,
            pub f_bfree: ::fsblkcnt_t,
            pub f_bavail: ::fsblkcnt_t,
            pub f_files: ::fsfilcnt_t,
            pub f_ffree: ::fsfilcnt_t,
            pub f_favail: ::fsfilcnt_t,
            #[cfg(target_endian = "little")]
            pub f_fsid: ::c_ulong,
            #[cfg(target_pointer_width = "32")]
            __f_unused: ::c_int,
            #[cfg(target_endian = "big")]
            pub f_fsid: ::c_ulong,
            pub f_flag: ::c_ulong,
            pub f_namemax: ::c_ulong,
            __f_spare: [::c_int; 6],
        }

        pub struct dqblk {
            pub dqb_bhardlimit: ::uint64_t,
            pub dqb_bsoftlimit: ::uint64_t,
            pub dqb_curspace: ::uint64_t,
            pub dqb_ihardlimit: ::uint64_t,
            pub dqb_isoftlimit: ::uint64_t,
            pub dqb_curinodes: ::uint64_t,
            pub dqb_btime: ::uint64_t,
            pub dqb_itime: ::uint64_t,
            pub dqb_valid: ::uint32_t,
        }

        pub struct signalfd_siginfo {
            pub ssi_signo: ::uint32_t,
            pub ssi_errno: ::int32_t,
            pub ssi_code: ::int32_t,
            pub ssi_pid: ::uint32_t,
            pub ssi_uid: ::uint32_t,
            pub ssi_fd: ::int32_t,
            pub ssi_tid: ::uint32_t,
            pub ssi_band: ::uint32_t,
            pub ssi_overrun: ::uint32_t,
            pub ssi_trapno: ::uint32_t,
            pub ssi_status: ::int32_t,
            pub ssi_int: ::int32_t,
            pub ssi_ptr: ::uint64_t,
            pub ssi_utime: ::uint64_t,
            pub ssi_stime: ::uint64_t,
            pub ssi_addr: ::uint64_t,
            _pad: [::uint8_t; 48],
        }

        pub struct fsid_t {
            __val: [::c_int; 2],
        }

        pub struct mq_attr {
            pub mq_flags: ::c_long,
            pub mq_maxmsg: ::c_long,
            pub mq_msgsize: ::c_long,
            pub mq_curmsgs: ::c_long,
            pad: [::c_long; 4]
        }

        pub struct cpu_set_t {
            #[cfg(target_pointer_width = "32")]
            bits: [u32; 32],
            #[cfg(target_pointer_width = "64")]
            bits: [u64; 16],
        }

        pub struct if_nameindex {
            pub if_index: ::c_uint,
            pub if_name: *mut ::c_char,
        }

        // System V IPC
        pub struct msginfo {
            pub msgpool: ::c_int,
            pub msgmap: ::c_int,
            pub msgmax: ::c_int,
            pub msgmnb: ::c_int,
            pub msgmni: ::c_int,
            pub msgssz: ::c_int,
            pub msgtql: ::c_int,
            pub msgseg: ::c_ushort,
        }
    }

    pub const ABDAY_1: ::nl_item = 0x20000;
    pub const ABDAY_2: ::nl_item = 0x20001;
    pub const ABDAY_3: ::nl_item = 0x20002;
    pub const ABDAY_4: ::nl_item = 0x20003;
    pub const ABDAY_5: ::nl_item = 0x20004;
    pub const ABDAY_6: ::nl_item = 0x20005;
    pub const ABDAY_7: ::nl_item = 0x20006;

    pub const DAY_1: ::nl_item = 0x20007;
    pub const DAY_2: ::nl_item = 0x20008;
    pub const DAY_3: ::nl_item = 0x20009;
    pub const DAY_4: ::nl_item = 0x2000A;
    pub const DAY_5: ::nl_item = 0x2000B;
    pub const DAY_6: ::nl_item = 0x2000C;
    pub const DAY_7: ::nl_item = 0x2000D;

    pub const ABMON_1: ::nl_item = 0x2000E;
    pub const ABMON_2: ::nl_item = 0x2000F;
    pub const ABMON_3: ::nl_item = 0x20010;
    pub const ABMON_4: ::nl_item = 0x20011;
    pub const ABMON_5: ::nl_item = 0x20012;
    pub const ABMON_6: ::nl_item = 0x20013;
    pub const ABMON_7: ::nl_item = 0x20014;
    pub const ABMON_8: ::nl_item = 0x20015;
    pub const ABMON_9: ::nl_item = 0x20016;
    pub const ABMON_10: ::nl_item = 0x20017;
    pub const ABMON_11: ::nl_item = 0x20018;
    pub const ABMON_12: ::nl_item = 0x20019;

    pub const CLONE_NEWCGROUP: ::c_int = 0x02000000;

    pub const MON_1: ::nl_item = 0x2001A;
    pub const MON_2: ::nl_item = 0x2001B;
    pub const MON_3: ::nl_item = 0x2001C;
    pub const MON_4: ::nl_item = 0x2001D;
    pub const MON_5: ::nl_item = 0x2001E;
    pub const MON_6: ::nl_item = 0x2001F;
    pub const MON_7: ::nl_item = 0x20020;
    pub const MON_8: ::nl_item = 0x20021;
    pub const MON_9: ::nl_item = 0x20022;
    pub const MON_10: ::nl_item = 0x20023;
    pub const MON_11: ::nl_item = 0x20024;
    pub const MON_12: ::nl_item = 0x20025;

    pub const AM_STR: ::nl_item = 0x20026;
    pub const PM_STR: ::nl_item = 0x20027;

    pub const D_T_FMT: ::nl_item = 0x20028;
    pub const D_FMT: ::nl_item = 0x20029;
    pub const T_FMT: ::nl_item = 0x2002A;
    pub const T_FMT_AMPM: ::nl_item = 0x2002B;

    pub const ERA: ::nl_item = 0x2002C;
    pub const ERA_D_FMT: ::nl_item = 0x2002E;
    pub const ALT_DIGITS: ::nl_item = 0x2002F;
    pub const ERA_D_T_FMT: ::nl_item = 0x20030;
    pub const ERA_T_FMT: ::nl_item = 0x20031;

    pub const CODESET: ::nl_item = 14;

    pub const CRNCYSTR: ::nl_item = 0x4000F;

    pub const RUSAGE_THREAD: ::c_int = 1;
    pub const RUSAGE_CHILDREN: ::c_int = -1;

    pub const RADIXCHAR: ::nl_item = 0x10000;
    pub const THOUSEP: ::nl_item = 0x10001;

    pub const YESEXPR: ::nl_item = 0x50000;
    pub const NOEXPR: ::nl_item = 0x50001;
    pub const YESSTR: ::nl_item = 0x50002;
    pub const NOSTR: ::nl_item = 0x50003;

    pub const FILENAME_MAX: ::c_uint = 4096;
    pub const L_tmpnam: ::c_uint = 20;
    pub const _PC_LINK_MAX: ::c_int = 0;
    pub const _PC_MAX_CANON: ::c_int = 1;
    pub const _PC_MAX_INPUT: ::c_int = 2;
    pub const _PC_NAME_MAX: ::c_int = 3;
    pub const _PC_PATH_MAX: ::c_int = 4;
    pub const _PC_PIPE_BUF: ::c_int = 5;
    pub const _PC_CHOWN_RESTRICTED: ::c_int = 6;
    pub const _PC_NO_TRUNC: ::c_int = 7;
    pub const _PC_VDISABLE: ::c_int = 8;

    pub const _SC_ARG_MAX: ::c_int = 0;
    pub const _SC_CHILD_MAX: ::c_int = 1;
    pub const _SC_CLK_TCK: ::c_int = 2;
    pub const _SC_NGROUPS_MAX: ::c_int = 3;
    pub const _SC_OPEN_MAX: ::c_int = 4;
    pub const _SC_STREAM_MAX: ::c_int = 5;
    pub const _SC_TZNAME_MAX: ::c_int = 6;
    pub const _SC_JOB_CONTROL: ::c_int = 7;
    pub const _SC_SAVED_IDS: ::c_int = 8;
    pub const _SC_REALTIME_SIGNALS: ::c_int = 9;
    pub const _SC_PRIORITY_SCHEDULING: ::c_int = 10;
    pub const _SC_TIMERS: ::c_int = 11;
    pub const _SC_ASYNCHRONOUS_IO: ::c_int = 12;
    pub const _SC_PRIORITIZED_IO: ::c_int = 13;
    pub const _SC_SYNCHRONIZED_IO: ::c_int = 14;
    pub const _SC_FSYNC: ::c_int = 15;
    pub const _SC_MAPPED_FILES: ::c_int = 16;
    pub const _SC_MEMLOCK: ::c_int = 17;
    pub const _SC_MEMLOCK_RANGE: ::c_int = 18;
    pub const _SC_MEMORY_PROTECTION: ::c_int = 19;
    pub const _SC_MESSAGE_PASSING: ::c_int = 20;
    pub const _SC_SEMAPHORES: ::c_int = 21;
    pub const _SC_SHARED_MEMORY_OBJECTS: ::c_int = 22;
    pub const _SC_AIO_LISTIO_MAX: ::c_int = 23;
    pub const _SC_AIO_MAX: ::c_int = 24;
    pub const _SC_AIO_PRIO_DELTA_MAX: ::c_int = 25;
    pub const _SC_DELAYTIMER_MAX: ::c_int = 26;
    pub const _SC_MQ_OPEN_MAX: ::c_int = 27;
    pub const _SC_MQ_PRIO_MAX: ::c_int = 28;
    pub const _SC_VERSION: ::c_int = 29;
    pub const _SC_PAGESIZE: ::c_int = 30;
    pub const _SC_PAGE_SIZE: ::c_int = _SC_PAGESIZE;
    pub const _SC_RTSIG_MAX: ::c_int = 31;
    pub const _SC_SEM_NSEMS_MAX: ::c_int = 32;
    pub const _SC_SEM_VALUE_MAX: ::c_int = 33;
    pub const _SC_SIGQUEUE_MAX: ::c_int = 34;
    pub const _SC_TIMER_MAX: ::c_int = 35;
    pub const _SC_BC_BASE_MAX: ::c_int = 36;
    pub const _SC_BC_DIM_MAX: ::c_int = 37;
    pub const _SC_BC_SCALE_MAX: ::c_int = 38;
    pub const _SC_BC_STRING_MAX: ::c_int = 39;
    pub const _SC_COLL_WEIGHTS_MAX: ::c_int = 40;
    pub const _SC_EXPR_NEST_MAX: ::c_int = 42;
    pub const _SC_LINE_MAX: ::c_int = 43;
    pub const _SC_RE_DUP_MAX: ::c_int = 44;
    pub const _SC_2_VERSION: ::c_int = 46;
    pub const _SC_2_C_BIND: ::c_int = 47;
    pub const _SC_2_C_DEV: ::c_int = 48;
    pub const _SC_2_FORT_DEV: ::c_int = 49;
    pub const _SC_2_FORT_RUN: ::c_int = 50;
    pub const _SC_2_SW_DEV: ::c_int = 51;
    pub const _SC_2_LOCALEDEF: ::c_int = 52;
    pub const _SC_IOV_MAX: ::c_int = 60;
    pub const _SC_THREADS: ::c_int = 67;
    pub const _SC_THREAD_SAFE_FUNCTIONS: ::c_int = 68;
    pub const _SC_GETGR_R_SIZE_MAX: ::c_int = 69;
    pub const _SC_GETPW_R_SIZE_MAX: ::c_int = 70;
    pub const _SC_LOGIN_NAME_MAX: ::c_int = 71;
    pub const _SC_TTY_NAME_MAX: ::c_int = 72;
    pub const _SC_THREAD_DESTRUCTOR_ITERATIONS: ::c_int = 73;
    pub const _SC_THREAD_KEYS_MAX: ::c_int = 74;
    pub const _SC_THREAD_STACK_MIN: ::c_int = 75;
    pub const _SC_THREAD_THREADS_MAX: ::c_int = 76;
    pub const _SC_THREAD_ATTR_STACKADDR: ::c_int = 77;
    pub const _SC_THREAD_ATTR_STACKSIZE: ::c_int = 78;
    pub const _SC_THREAD_PRIORITY_SCHEDULING: ::c_int = 79;
    pub const _SC_THREAD_PRIO_INHERIT: ::c_int = 80;
    pub const _SC_THREAD_PRIO_PROTECT: ::c_int = 81;
    pub const _SC_NPROCESSORS_ONLN: ::c_int = 84;
    pub const _SC_ATEXIT_MAX: ::c_int = 87;
    pub const _SC_XOPEN_VERSION: ::c_int = 89;
    pub const _SC_XOPEN_XCU_VERSION: ::c_int = 90;
    pub const _SC_XOPEN_UNIX: ::c_int = 91;
    pub const _SC_XOPEN_CRYPT: ::c_int = 92;
    pub const _SC_XOPEN_ENH_I18N: ::c_int = 93;
    pub const _SC_XOPEN_SHM: ::c_int = 94;
    pub const _SC_2_CHAR_TERM: ::c_int = 95;
    pub const _SC_2_UPE: ::c_int = 97;
    pub const _SC_XBS5_ILP32_OFF32: ::c_int = 125;
    pub const _SC_XBS5_ILP32_OFFBIG: ::c_int = 126;
    pub const _SC_XBS5_LPBIG_OFFBIG: ::c_int = 128;
    pub const _SC_XOPEN_LEGACY: ::c_int = 129;
    pub const _SC_XOPEN_REALTIME: ::c_int = 130;
    pub const _SC_XOPEN_REALTIME_THREADS: ::c_int = 131;
    pub const _SC_HOST_NAME_MAX: ::c_int = 180;

    pub const RLIM_SAVED_MAX: ::rlim_t = RLIM_INFINITY;
    pub const RLIM_SAVED_CUR: ::rlim_t = RLIM_INFINITY;

    pub const GLOB_ERR: ::c_int = 1 << 0;
    pub const GLOB_MARK: ::c_int = 1 << 1;
    pub const GLOB_NOSORT: ::c_int = 1 << 2;
    pub const GLOB_DOOFFS: ::c_int = 1 << 3;
    pub const GLOB_NOCHECK: ::c_int = 1 << 4;
    pub const GLOB_APPEND: ::c_int = 1 << 5;
    pub const GLOB_NOESCAPE: ::c_int = 1 << 6;

    pub const GLOB_NOSPACE: ::c_int = 1;
    pub const GLOB_ABORTED: ::c_int = 2;
    pub const GLOB_NOMATCH: ::c_int = 3;

    pub const POSIX_MADV_NORMAL: ::c_int = 0;
    pub const POSIX_MADV_RANDOM: ::c_int = 1;
    pub const POSIX_MADV_SEQUENTIAL: ::c_int = 2;
    pub const POSIX_MADV_WILLNEED: ::c_int = 3;

    pub const S_IEXEC: mode_t = 64;
    pub const S_IWRITE: mode_t = 128;
    pub const S_IREAD: mode_t = 256;

    pub const F_LOCK: ::c_int = 1;
    pub const F_TEST: ::c_int = 3;
    pub const F_TLOCK: ::c_int = 2;
    pub const F_ULOCK: ::c_int = 0;

    pub const ST_RDONLY: ::c_ulong = 1;
    pub const ST_NOSUID: ::c_ulong = 2;
    pub const ST_NODEV: ::c_ulong = 4;
    pub const ST_NOEXEC: ::c_ulong = 8;
    pub const ST_SYNCHRONOUS: ::c_ulong = 16;
    pub const ST_MANDLOCK: ::c_ulong = 64;
    pub const ST_WRITE: ::c_ulong = 128;
    pub const ST_APPEND: ::c_ulong = 256;
    pub const ST_IMMUTABLE: ::c_ulong = 512;
    pub const ST_NOATIME: ::c_ulong = 1024;
    pub const ST_NODIRATIME: ::c_ulong = 2048;

    pub const RTLD_NEXT: *mut ::c_void = -1i64 as *mut ::c_void;
    pub const RTLD_DEFAULT: *mut ::c_void = 0i64 as *mut ::c_void;
    pub const RTLD_NODELETE: ::c_int = 0x1000;
    pub const RTLD_NOW: ::c_int = 0x2;

    pub const TCP_MD5SIG: ::c_int = 14;

    pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = pthread_mutex_t {
        __align: [],
        size: [0; __SIZEOF_PTHREAD_MUTEX_T],
    };
    pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = pthread_cond_t {
        __align: [],
        size: [0; __SIZEOF_PTHREAD_COND_T],
    };
    pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = pthread_rwlock_t {
        __align: [],
        size: [0; __SIZEOF_PTHREAD_RWLOCK_T],
    };
    pub const PTHREAD_MUTEX_NORMAL: ::c_int = 0;
    pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 1;
    pub const PTHREAD_MUTEX_ERRORCHECK: ::c_int = 2;
    pub const PTHREAD_MUTEX_DEFAULT: ::c_int = PTHREAD_MUTEX_NORMAL;
    pub const __SIZEOF_PTHREAD_COND_T: usize = 48;

    pub const SCHED_OTHER: ::c_int = 0;
    pub const SCHED_FIFO: ::c_int = 1;
    pub const SCHED_RR: ::c_int = 2;
    pub const SCHED_BATCH: ::c_int = 3;
    pub const SCHED_IDLE: ::c_int = 5;

    // System V IPC
    pub const IPC_PRIVATE: ::key_t = 0;

    pub const IPC_CREAT: ::c_int = 0o1000;
    pub const IPC_EXCL: ::c_int = 0o2000;
    pub const IPC_NOWAIT: ::c_int = 0o4000;

    pub const IPC_RMID: ::c_int = 0;
    pub const IPC_SET: ::c_int = 1;
    pub const IPC_STAT: ::c_int = 2;
    pub const IPC_INFO: ::c_int = 3;
    pub const MSG_STAT: ::c_int = 11;
    pub const MSG_INFO: ::c_int = 12;

    pub const MSG_NOERROR: ::c_int = 0o10000;
    pub const MSG_EXCEPT: ::c_int = 0o20000;
    pub const MSG_COPY: ::c_int = 0o40000;

    pub const SHM_R: ::c_int = 0o400;
    pub const SHM_W: ::c_int = 0o200;

    pub const SHM_RDONLY: ::c_int = 0o10000;
    pub const SHM_RND: ::c_int = 0o20000;
    pub const SHM_REMAP: ::c_int = 0o40000;
    pub const SHM_EXEC: ::c_int = 0o100000;

    pub const SHM_LOCK: ::c_int = 11;
    pub const SHM_UNLOCK: ::c_int = 12;

    pub const SHM_HUGETLB: ::c_int = 0o4000;
    pub const SHM_NORESERVE: ::c_int = 0o10000;

    pub const EPOLLRDHUP: ::c_int = 0x2000;
    pub const EPOLLONESHOT: ::c_int = 0x40000000;

    pub const QFMT_VFS_OLD: ::c_int = 1;
    pub const QFMT_VFS_V0: ::c_int = 2;

    pub const SFD_CLOEXEC: ::c_int = 0x080000;

    pub const EFD_SEMAPHORE: ::c_int = 0x1;

    pub const NCCS: usize = 32;

    pub const LOG_NFACILITIES: ::c_int = 24;

    pub const SEM_FAILED: *mut ::sem_t = 0 as *mut sem_t;

    pub const RB_AUTOBOOT: ::c_int = 0x01234567u32 as i32;
    pub const RB_HALT_SYSTEM: ::c_int = 0xcdef0123u32 as i32;
    pub const RB_ENABLE_CAD: ::c_int = 0x89abcdefu32 as i32;
    pub const RB_DISABLE_CAD: ::c_int = 0x00000000u32 as i32;
    pub const RB_POWER_OFF: ::c_int = 0x4321fedcu32 as i32;
    pub const RB_SW_SUSPEND: ::c_int = 0xd000fce2u32 as i32;
    pub const RB_KEXEC: ::c_int = 0x45584543u32 as i32;

    pub const SYNC_FILE_RANGE_WAIT_BEFORE: ::c_uint = 1;
    pub const SYNC_FILE_RANGE_WRITE: ::c_uint = 2;
    pub const SYNC_FILE_RANGE_WAIT_AFTER: ::c_uint = 4;

    pub const EAI_SYSTEM: ::c_int = -11;

    pub const AIO_CANCELED: ::c_int = 0;
    pub const AIO_NOTCANCELED: ::c_int = 1;
    pub const AIO_ALLDONE: ::c_int = 2;
    pub const LIO_READ: ::c_int = 0;
    pub const LIO_WRITE: ::c_int = 1;
    pub const LIO_NOP: ::c_int = 2;
    pub const LIO_WAIT: ::c_int = 0;
    pub const LIO_NOWAIT: ::c_int = 1;

    f! {
        pub fn CPU_ZERO(cpuset: &mut cpu_set_t) -> () {
            for slot in cpuset.bits.iter_mut() {
                *slot = 0;
            }
        }

        pub fn CPU_SET(cpu: usize, cpuset: &mut cpu_set_t) -> () {
            let size_in_bits = 8 * mem::size_of_val(&cpuset.bits[0]); // 32, 64 etc
            let (idx, offset) = (cpu / size_in_bits, cpu % size_in_bits);
            cpuset.bits[idx] |= 1 << offset;
            ()
        }

        pub fn CPU_CLR(cpu: usize, cpuset: &mut cpu_set_t) -> () {
            let size_in_bits = 8 * mem::size_of_val(&cpuset.bits[0]); // 32, 64 etc
            let (idx, offset) = (cpu / size_in_bits, cpu % size_in_bits);
            cpuset.bits[idx] &= !(1 << offset);
            ()
        }

        pub fn CPU_ISSET(cpu: usize, cpuset: &cpu_set_t) -> bool {
            let size_in_bits = 8 * mem::size_of_val(&cpuset.bits[0]);
            let (idx, offset) = (cpu / size_in_bits, cpu % size_in_bits);
            0 != (cpuset.bits[idx] & (1 << offset))
        }

        pub fn CPU_EQUAL(set1: &cpu_set_t, set2: &cpu_set_t) -> bool {
            set1.bits == set2.bits
        }
    }

    extern {
        pub fn aio_read(aiocbp: *mut aiocb) -> ::c_int;
        pub fn aio_write(aiocbp: *mut aiocb) -> ::c_int;
        pub fn aio_fsync(op: ::c_int, aiocbp: *mut aiocb) -> ::c_int;
        pub fn aio_error(aiocbp: *const aiocb) -> ::c_int;
        pub fn aio_return(aiocbp: *mut aiocb) -> ::ssize_t;
        pub fn aio_suspend(aiocb_list: *const *const aiocb, nitems: ::c_int,
                           timeout: *const ::timespec) -> ::c_int;
        pub fn aio_cancel(fd: ::c_int, aiocbp: *mut aiocb) -> ::c_int;
        pub fn lio_listio(mode: ::c_int, aiocb_list: *const *mut aiocb,
                          nitems: ::c_int, sevp: *mut ::sigevent) -> ::c_int;

        pub fn lutimes(file: *const ::c_char, times: *const ::timeval) -> ::c_int;

        pub fn setpwent();
        pub fn getpwent() -> *mut passwd;
        pub fn setspent();
        pub fn endspent();
        pub fn getspent() -> *mut spwd;
        pub fn getspnam(__name: *const ::c_char) -> *mut spwd;

        pub fn shm_open(name: *const c_char, oflag: ::c_int,
                        mode: mode_t) -> ::c_int;

        // System V IPC
        pub fn shmget(key: ::key_t, size: ::size_t, shmflg: ::c_int) -> ::c_int;
        pub fn shmat(shmid: ::c_int,
                     shmaddr: *const ::c_void,
                     shmflg: ::c_int) -> *mut ::c_void;
        pub fn shmdt(shmaddr: *const ::c_void) -> ::c_int;
        pub fn shmctl(shmid: ::c_int,
                      cmd: ::c_int,
                      buf: *mut ::shmid_ds) -> ::c_int;
        pub fn ftok(pathname: *const ::c_char, proj_id: ::c_int) -> ::key_t;
        pub fn msgctl(msqid: ::c_int, cmd: ::c_int, buf: *mut msqid_ds) -> ::c_int;
        pub fn msgget(key: ::key_t, msgflg: ::c_int) -> ::c_int;
        pub fn msgrcv(msqid: ::c_int, msgp: *mut ::c_void, msgsz: ::size_t,
                      msgtyp: ::c_long, msgflg: ::c_int) -> ::ssize_t;
        pub fn msgsnd(msqid: ::c_int, msgp: *const ::c_void, msgsz: ::size_t,
                      msgflg: ::c_int) -> ::c_int;

        pub fn mprotect(addr: *mut ::c_void, len: ::size_t, prot: ::c_int)
                        -> ::c_int;
        pub fn __errno_location() -> *mut ::c_int;

        pub fn fopen64(filename: *const c_char,
                       mode: *const c_char) -> *mut ::FILE;
        pub fn freopen64(filename: *const c_char, mode: *const c_char,
                         file: *mut ::FILE) -> *mut ::FILE;
        pub fn tmpfile64() -> *mut ::FILE;
        pub fn fgetpos64(stream: *mut ::FILE, ptr: *mut fpos64_t) -> ::c_int;
        pub fn fsetpos64(stream: *mut ::FILE, ptr: *const fpos64_t) -> ::c_int;
        pub fn fseeko64(stream: *mut ::FILE,
                        offset: ::off64_t,
                        whence: ::c_int) -> ::c_int;
        pub fn ftello64(stream: *mut ::FILE) -> ::off64_t;
        pub fn fallocate(fd: ::c_int, mode: ::c_int,
                         offset: ::off_t, len: ::off_t) -> ::c_int;
        pub fn posix_fallocate(fd: ::c_int, offset: ::off_t,
                               len: ::off_t) -> ::c_int;
        pub fn readahead(fd: ::c_int, offset: ::off64_t,
                         count: ::size_t) -> ::ssize_t;
        pub fn getxattr(path: *const c_char, name: *const c_char,
                        value: *mut ::c_void, size: ::size_t) -> ::ssize_t;
        pub fn lgetxattr(path: *const c_char, name: *const c_char,
                         value: *mut ::c_void, size: ::size_t) -> ::ssize_t;
        pub fn fgetxattr(filedes: ::c_int, name: *const c_char,
                         value: *mut ::c_void, size: ::size_t) -> ::ssize_t;
        pub fn setxattr(path: *const c_char, name: *const c_char,
                        value: *const ::c_void, size: ::size_t,
                        flags: ::c_int) -> ::c_int;
        pub fn lsetxattr(path: *const c_char, name: *const c_char,
                         value: *const ::c_void, size: ::size_t,
                         flags: ::c_int) -> ::c_int;
        pub fn fsetxattr(filedes: ::c_int, name: *const c_char,
                         value: *const ::c_void, size: ::size_t,
                         flags: ::c_int) -> ::c_int;
        pub fn listxattr(path: *const c_char, list: *mut c_char,
                         size: ::size_t) -> ::ssize_t;
        pub fn llistxattr(path: *const c_char, list: *mut c_char,
                          size: ::size_t) -> ::ssize_t;
        pub fn flistxattr(filedes: ::c_int, list: *mut c_char,
                          size: ::size_t) -> ::ssize_t;
        pub fn removexattr(path: *const c_char, name: *const c_char) -> ::c_int;
        pub fn lremovexattr(path: *const c_char, name: *const c_char) -> ::c_int;
        pub fn fremovexattr(filedes: ::c_int, name: *const c_char) -> ::c_int;
        pub fn signalfd(fd: ::c_int,
                        mask: *const ::sigset_t,
                        flags: ::c_int) -> ::c_int;
        pub fn pwritev(fd: ::c_int,
                       iov: *const ::iovec,
                       iovcnt: ::c_int,
                       offset: ::off_t) -> ::ssize_t;
        pub fn preadv(fd: ::c_int,
                      iov: *const ::iovec,
                      iovcnt: ::c_int,
                      offset: ::off_t) -> ::ssize_t;
        pub fn quotactl(cmd: ::c_int,
                        special: *const ::c_char,
                        id: ::c_int,
                        data: *mut ::c_char) -> ::c_int;
        pub fn mq_open(name: *const ::c_char, oflag: ::c_int, ...) -> ::mqd_t;
        pub fn mq_close(mqd: ::mqd_t) -> ::c_int;
        pub fn mq_unlink(name: *const ::c_char) -> ::c_int;
        pub fn mq_receive(mqd: ::mqd_t,
                          msg_ptr: *mut ::c_char,
                          msg_len: ::size_t,
                          msq_prio: *mut ::c_uint) -> ::ssize_t;
        pub fn mq_send(mqd: ::mqd_t,
                       msg_ptr: *const ::c_char,
                       msg_len: ::size_t,
                       msq_prio: ::c_uint) -> ::c_int;
        pub fn mq_getattr(mqd: ::mqd_t, attr: *mut ::mq_attr) -> ::c_int;
        pub fn mq_setattr(mqd: ::mqd_t,
                          newattr: *const ::mq_attr,
                          oldattr: *mut ::mq_attr) -> ::c_int;
        pub fn epoll_pwait(epfd: ::c_int,
                           events: *mut ::epoll_event,
                           maxevents: ::c_int,
                           timeout: ::c_int,
                           sigmask: *const ::sigset_t) -> ::c_int;
        pub fn dup3(oldfd: ::c_int, newfd: ::c_int, flags: ::c_int) -> ::c_int;
        pub fn sethostname(name: *const ::c_char, len: ::size_t) -> ::c_int;
        pub fn mkostemp(template: *mut ::c_char, flags: ::c_int) -> ::c_int;
        pub fn mkostemps(template: *mut ::c_char,
                         suffixlen: ::c_int,
                         flags: ::c_int) -> ::c_int;
        pub fn sigtimedwait(set: *const sigset_t,
                            info: *mut siginfo_t,
                            timeout: *const ::timespec) -> ::c_int;
        pub fn sigwaitinfo(set: *const sigset_t,
                           info: *mut siginfo_t) -> ::c_int;
        pub fn openpty(amaster: *mut ::c_int,
                       aslave: *mut ::c_int,
                       name: *mut ::c_char,
                       termp: *const termios,
                       winp: *const ::winsize) -> ::c_int;
        pub fn forkpty(amaster: *mut ::c_int,
                       name: *mut ::c_char,
                       termp: *const termios,
                       winp: *const ::winsize) -> ::pid_t;
        pub fn nl_langinfo_l(item: ::nl_item, locale: ::locale_t) -> *mut ::c_char;
        pub fn getnameinfo(sa: *const ::sockaddr,
                           salen: ::socklen_t,
                           host: *mut ::c_char,
                           hostlen: ::socklen_t,
                           serv: *mut ::c_char,
                           sevlen: ::socklen_t,
                           flags: ::c_int) -> ::c_int;
        pub fn prlimit(pid: ::pid_t, resource: ::c_int, new_limit: *const ::rlimit,
                       old_limit: *mut ::rlimit) -> ::c_int;
        pub fn prlimit64(pid: ::pid_t,
                         resource: ::c_int,
                         new_limit: *const ::rlimit64,
                         old_limit: *mut ::rlimit64) -> ::c_int;
        pub fn getloadavg(loadavg: *mut ::c_double, nelem: ::c_int) -> ::c_int;
        pub fn process_vm_readv(pid: ::pid_t,
                                local_iov: *const ::iovec,
                                liovcnt: ::c_ulong,
                                remote_iov: *const ::iovec,
                                riovcnt: ::c_ulong,
                                flags: ::c_ulong) -> isize;
        pub fn process_vm_writev(pid: ::pid_t,
                                 local_iov: *const ::iovec,
                                 liovcnt: ::c_ulong,
                                 remote_iov: *const ::iovec,
                                 riovcnt: ::c_ulong,
                                 flags: ::c_ulong) -> isize;
        pub fn reboot(how_to: ::c_int) -> ::c_int;
        pub fn setfsgid(gid: ::gid_t) -> ::c_int;
        pub fn setfsuid(uid: ::uid_t) -> ::c_int;
        pub fn setresgid(rgid: ::gid_t, egid: ::gid_t, sgid: ::gid_t) -> ::c_int;
        pub fn setresuid(ruid: ::uid_t, euid: ::uid_t, suid: ::uid_t) -> ::c_int;

        // Not available now on Android
        pub fn mkfifoat(dirfd: ::c_int, pathname: *const ::c_char,
                        mode: ::mode_t) -> ::c_int;
        pub fn if_nameindex() -> *mut if_nameindex;
        pub fn if_freenameindex(ptr: *mut if_nameindex);
        pub fn sync_file_range(fd: ::c_int, offset: ::off64_t,
                               nbytes: ::off64_t, flags: ::c_uint) -> ::c_int;
        pub fn getifaddrs(ifap: *mut *mut ::ifaddrs) -> ::c_int;
        pub fn freeifaddrs(ifa: *mut ::ifaddrs);
    }

    cfg_if! {
        if #[cfg(any(target_env = "musl",
                     target_os = "fuchsia",
                     target_os = "emscripten"))] {
            mod musl;
            pub use self::musl::*;
        } else if #[cfg(any(target_arch = "mips",
                            target_arch = "mips64"))] {
            mod mips;
            pub use self::mips::*;
        } else if #[cfg(any(target_arch = "s390x"))] {
            mod s390x;
            pub use self::s390x::*;
        } else {
            mod other;
            pub use self::other::*;
        }
    }

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