diff --git a/src/unix/linux_like/linux/gnu/b32/arm/mod.rs b/src/unix/linux_like/linux/gnu/b32/arm/mod.rs
index 0a5fc8567b570..0f9dd142b779c 100644
--- a/src/unix/linux_like/linux/gnu/b32/arm/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/arm/mod.rs
@@ -868,6 +868,16 @@ pub const SYS_pkey_alloc: ::c_long = 395;
 pub const SYS_pkey_free: ::c_long = 396;
 pub const SYS_statx: ::c_long = 397;
 
+// from uapi/asm-generic
+pub const _IOC_NRBITS: u32 = 8;
+pub const _IOC_TYPEBITS: u32 = 8;
+pub const _IOC_SIZEBITS: u32 = 14;
+pub const _IOC_DIRBITS: u32 = 2;
+
+pub const _IOC_NONE: ::c_ulong = 0;
+pub const _IOC_READ: ::c_ulong = 1;
+pub const _IOC_WRITE: ::c_ulong = 2;
+
 cfg_if! {
     if #[cfg(libc_align)] {
         mod align;
diff --git a/src/unix/linux_like/linux/gnu/b32/mips/mod.rs b/src/unix/linux_like/linux/gnu/b32/mips/mod.rs
index 4a3b600aaf6b4..e75821072fb96 100644
--- a/src/unix/linux_like/linux/gnu/b32/mips/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/mips/mod.rs
@@ -893,6 +893,17 @@ pub const TIOCM_DSR: ::c_int = 0x400;
 
 pub const EHWPOISON: ::c_int = 168;
 
+// from uapi/asm-generic
+pub const _IOC_NRBITS: u32 = 8;
+pub const _IOC_TYPEBITS: u32 = 8;
+// from arch/mips/include/uapi/asm
+pub const _IOC_SIZEBITS: u32 = 13;
+pub const _IOC_DIRBITS: u32 = 3;
+
+pub const _IOC_NONE: ::c_ulong = 1;
+pub const _IOC_READ: ::c_ulong = 2;
+pub const _IOC_WRITE: ::c_ulong = 4;
+
 cfg_if! {
     if #[cfg(libc_align)] {
         mod align;
diff --git a/src/unix/linux_like/linux/gnu/b32/powerpc.rs b/src/unix/linux_like/linux/gnu/b32/powerpc.rs
index 7644428014f1a..b413cf0a99681 100644
--- a/src/unix/linux_like/linux/gnu/b32/powerpc.rs
+++ b/src/unix/linux_like/linux/gnu/b32/powerpc.rs
@@ -871,3 +871,14 @@ pub const SYS_preadv2: ::c_long = 380;
 pub const SYS_pwritev2: ::c_long = 381;
 pub const SYS_kexec_file_load: ::c_long = 382;
 pub const SYS_statx: ::c_long = 383;
+
+// from uapi/asm-generic
+pub const _IOC_NRBITS: u32 = 8;
+pub const _IOC_TYPEBITS: u32 = 8;
+// from arch/powerpc/include/uapi/asm
+pub const _IOC_SIZEBITS: u32 = 13;
+pub const _IOC_DIRBITS: u32 = 3;
+
+pub const _IOC_NONE: ::c_ulong = 1;
+pub const _IOC_READ: ::c_ulong = 2;
+pub const _IOC_WRITE: ::c_ulong = 4;
diff --git a/src/unix/linux_like/linux/gnu/b32/sparc/mod.rs b/src/unix/linux_like/linux/gnu/b32/sparc/mod.rs
index f670b3422bff7..0b6729c1ae148 100644
--- a/src/unix/linux_like/linux/gnu/b32/sparc/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/sparc/mod.rs
@@ -958,6 +958,17 @@ pub const SYS_preadv2: ::c_long = 358;
 pub const SYS_pwritev2: ::c_long = 359;
 pub const SYS_statx: ::c_long = 360;
 
+// from uapi/asm-generic
+pub const _IOC_NRBITS: u32 = 8;
+pub const _IOC_TYPEBITS: u32 = 8;
+// from arch/sparc/include/uapi/asm
+pub const _IOC_SIZEBITS: u32 = 13;
+pub const _IOC_DIRBITS: u32 = 3;
+
+pub const _IOC_NONE: ::c_ulong = 1;
+pub const _IOC_READ: ::c_ulong = 2;
+pub const _IOC_WRITE: ::c_ulong = 4;
+
 #[link(name = "util")]
 extern "C" {
     pub fn sysctl(
diff --git a/src/unix/linux_like/linux/gnu/b32/x86/mod.rs b/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
index f5f7cac4c5ac4..f749914399a82 100644
--- a/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
@@ -1101,6 +1101,16 @@ pub const SYS_pkey_alloc: ::c_long = 381;
 pub const SYS_pkey_free: ::c_long = 382;
 pub const SYS_statx: ::c_long = 383;
 
+// from uapi/asm-generic
+pub const _IOC_NRBITS: u32 = 8;
+pub const _IOC_TYPEBITS: u32 = 8;
+pub const _IOC_SIZEBITS: u32 = 14;
+pub const _IOC_DIRBITS: u32 = 2;
+
+pub const _IOC_NONE: ::c_ulong = 0;
+pub const _IOC_READ: ::c_ulong = 1;
+pub const _IOC_WRITE: ::c_ulong = 2;
+
 // offsets in user_regs_structs, from sys/reg.h
 pub const EBX: ::c_int = 0;
 pub const ECX: ::c_int = 1;
diff --git a/src/unix/linux_like/linux/gnu/b64/aarch64/mod.rs b/src/unix/linux_like/linux/gnu/b64/aarch64/mod.rs
index 93f0f2bc1b0ae..4814ed8c8a167 100644
--- a/src/unix/linux_like/linux/gnu/b64/aarch64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/aarch64/mod.rs
@@ -946,6 +946,16 @@ extern "C" {
     ) -> ::c_int;
 }
 
+// from uapi/asm-generic
+pub const _IOC_NRBITS: u32 = 8;
+pub const _IOC_TYPEBITS: u32 = 8;
+pub const _IOC_SIZEBITS: u32 = 14;
+pub const _IOC_DIRBITS: u32 = 2;
+
+pub const _IOC_NONE: ::c_ulong = 0;
+pub const _IOC_READ: ::c_ulong = 1;
+pub const _IOC_WRITE: ::c_ulong = 2;
+
 cfg_if! {
     if #[cfg(libc_align)] {
         mod align;
diff --git a/src/unix/linux_like/linux/gnu/b64/mips64/mod.rs b/src/unix/linux_like/linux/gnu/b64/mips64/mod.rs
index a59554b844ff0..3b8a11b78b9e1 100644
--- a/src/unix/linux_like/linux/gnu/b64/mips64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/mips64/mod.rs
@@ -997,6 +997,17 @@ pub const TIOCM_DSR: ::c_int = 0x400;
 
 pub const EHWPOISON: ::c_int = 168;
 
+// from uapi/asm-generic
+pub const _IOC_NRBITS: u32 = 8;
+pub const _IOC_TYPEBITS: u32 = 8;
+// from arch/mips/include/uapi/asm
+pub const _IOC_SIZEBITS: u32 = 13;
+pub const _IOC_DIRBITS: u32 = 3;
+
+pub const _IOC_NONE: ::c_ulong = 1;
+pub const _IOC_READ: ::c_ulong = 2;
+pub const _IOC_WRITE: ::c_ulong = 4;
+
 #[link(name = "util")]
 extern "C" {
     pub fn sysctl(
diff --git a/src/unix/linux_like/linux/gnu/b64/powerpc64/mod.rs b/src/unix/linux_like/linux/gnu/b64/powerpc64/mod.rs
index 22507d72f3267..a727207b3f55c 100644
--- a/src/unix/linux_like/linux/gnu/b64/powerpc64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/powerpc64/mod.rs
@@ -1032,6 +1032,17 @@ pub const SYS_pwritev2: ::c_long = 381;
 pub const SYS_kexec_file_load: ::c_long = 382;
 pub const SYS_statx: ::c_long = 383;
 
+// from uapi/asm-generic
+pub const _IOC_NRBITS: u32 = 8;
+pub const _IOC_TYPEBITS: u32 = 8;
+// from arch/powerpc/include/uapi/asm
+pub const _IOC_SIZEBITS: u32 = 13;
+pub const _IOC_DIRBITS: u32 = 3;
+
+pub const _IOC_NONE: ::c_ulong = 1;
+pub const _IOC_READ: ::c_ulong = 2;
+pub const _IOC_WRITE: ::c_ulong = 4;
+
 #[link(name = "util")]
 extern "C" {
     pub fn sysctl(
diff --git a/src/unix/linux_like/linux/gnu/b64/riscv64/mod.rs b/src/unix/linux_like/linux/gnu/b64/riscv64/mod.rs
index c45c5b230bed7..a95877a3a4f12 100644
--- a/src/unix/linux_like/linux/gnu/b64/riscv64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/riscv64/mod.rs
@@ -859,3 +859,13 @@ pub const SYS_pkey_mprotect: ::c_long = 288;
 pub const SYS_pkey_alloc: ::c_long = 289;
 pub const SYS_pkey_free: ::c_long = 290;
 pub const SYS_statx: ::c_long = 291;
+
+// from uapi/asm-generic
+pub const _IOC_NRBITS: u32 = 8;
+pub const _IOC_TYPEBITS: u32 = 8;
+pub const _IOC_SIZEBITS: u32 = 14;
+pub const _IOC_DIRBITS: u32 = 2;
+
+pub const _IOC_NONE: ::c_ulong = 0;
+pub const _IOC_READ: ::c_ulong = 1;
+pub const _IOC_WRITE: ::c_ulong = 2;
diff --git a/src/unix/linux_like/linux/gnu/b64/s390x.rs b/src/unix/linux_like/linux/gnu/b64/s390x.rs
index cf0612a8ff784..ed0c148c3d69b 100644
--- a/src/unix/linux_like/linux/gnu/b64/s390x.rs
+++ b/src/unix/linux_like/linux/gnu/b64/s390x.rs
@@ -1003,6 +1003,16 @@ pub const SYS_setfsgid: ::c_long = 216;
 pub const SYS_newfstatat: ::c_long = 293;
 pub const SYS_statx: ::c_long = 379;
 
+// from uapi/asm-generic
+pub const _IOC_NRBITS: u32 = 8;
+pub const _IOC_TYPEBITS: u32 = 8;
+pub const _IOC_SIZEBITS: u32 = 14;
+pub const _IOC_DIRBITS: u32 = 2;
+
+pub const _IOC_NONE: ::c_ulong = 0;
+pub const _IOC_READ: ::c_ulong = 1;
+pub const _IOC_WRITE: ::c_ulong = 2;
+
 #[link(name = "util")]
 extern "C" {
 
diff --git a/src/unix/linux_like/linux/gnu/b64/sparc64/mod.rs b/src/unix/linux_like/linux/gnu/b64/sparc64/mod.rs
index 651ada376eecc..c303d44f3da2c 100644
--- a/src/unix/linux_like/linux/gnu/b64/sparc64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/sparc64/mod.rs
@@ -968,6 +968,17 @@ pub const SYS_preadv2: ::c_long = 358;
 pub const SYS_pwritev2: ::c_long = 359;
 pub const SYS_statx: ::c_long = 360;
 
+// from uapi/asm-generic
+pub const _IOC_NRBITS: u32 = 8;
+pub const _IOC_TYPEBITS: u32 = 8;
+// from arch/sparc/include/uapi/asm
+pub const _IOC_SIZEBITS: u32 = 13;
+pub const _IOC_DIRBITS: u32 = 3;
+
+pub const _IOC_NONE: ::c_ulong = 1;
+pub const _IOC_READ: ::c_ulong = 2;
+pub const _IOC_WRITE: ::c_ulong = 4;
+
 #[link(name = "util")]
 extern "C" {
     pub fn sysctl(
diff --git a/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs b/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
index 34e4da8bcb3bd..4bafdbba6b0ab 100644
--- a/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
@@ -890,6 +890,16 @@ pub const REG_TRAPNO: ::c_int = 20;
 pub const REG_OLDMASK: ::c_int = 21;
 pub const REG_CR2: ::c_int = 22;
 
+// from uapi/asm-generic
+pub const _IOC_NRBITS: u32 = 8;
+pub const _IOC_TYPEBITS: u32 = 8;
+pub const _IOC_SIZEBITS: u32 = 14;
+pub const _IOC_DIRBITS: u32 = 2;
+
+pub const _IOC_NONE: ::c_ulong = 0;
+pub const _IOC_READ: ::c_ulong = 1;
+pub const _IOC_WRITE: ::c_ulong = 2;
+
 extern "C" {
     pub fn getcontext(ucp: *mut ucontext_t) -> ::c_int;
     pub fn setcontext(ucp: *const ucontext_t) -> ::c_int;
diff --git a/src/unix/linux_like/linux/gnu/mod.rs b/src/unix/linux_like/linux/gnu/mod.rs
index ea041aa6dae18..0fd9ed61ac530 100644
--- a/src/unix/linux_like/linux/gnu/mod.rs
+++ b/src/unix/linux_like/linux/gnu/mod.rs
@@ -961,6 +961,38 @@ extern "C" {
     ) -> ::ssize_t;
 }
 
+// glibc uses the definitions from the kernel header files.
+pub fn _IOC(dir: ::c_ulong, typ: u8, nr: u8, size: ::c_ulong) -> ::c_ulong {
+    const _IOC_NRSHIFT: u32 = 0;
+    const _IOC_TYPESHIFT: u32 = _IOC_NRSHIFT+_IOC_NRBITS;
+    const _IOC_SIZESHIFT: u32 = _IOC_TYPESHIFT+_IOC_TYPEBITS;
+    const _IOC_DIRSHIFT: u32 = _IOC_SIZESHIFT+_IOC_SIZEBITS;
+
+    ((dir)              << _IOC_DIRSHIFT) |
+    ((typ as ::c_ulong) << _IOC_TYPESHIFT) |
+    ((nr as ::c_ulong)  << _IOC_NRSHIFT) |
+    ((size)             << _IOC_SIZESHIFT)
+}
+
+pub fn _IO(a:u8,b:u8) -> ::c_ulong {
+    _IOC(_IOC_NONE,a,b,0)
+}
+
+pub fn _IOW<T: Sized> (a:u8,b:u8) -> ::c_ulong {
+    let size = ::core::mem::size_of::<T>() as ::c_ulong;
+    _IOC(_IOC_WRITE,a,b,size)
+}
+
+pub fn _IOR<T: Sized> (a:u8,b:u8) -> ::c_ulong {
+    let size = ::core::mem::size_of::<T>() as ::c_ulong;
+    _IOC(_IOC_READ,a,b,size)
+}
+
+pub fn _IOWR<T: Sized> (a:u8,b:u8) -> ::c_ulong {
+    let size = ::core::mem::size_of::<T>() as ::c_ulong;
+    _IOC(_IOC_READ|_IOC_WRITE,a,b,size)
+}
+
 #[link(name = "util")]
 extern "C" {
     pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
diff --git a/src/unix/linux_like/linux/musl/b32/arm/mod.rs b/src/unix/linux_like/linux/musl/b32/arm/mod.rs
index ff23688734721..70a74eaef9aa3 100644
--- a/src/unix/linux_like/linux/musl/b32/arm/mod.rs
+++ b/src/unix/linux_like/linux/musl/b32/arm/mod.rs
@@ -152,6 +152,33 @@ s! {
     }
 }
 
+pub fn _IOC(a: ::c_uint, b: u8, c: u8, d: ::c_int) -> ::c_int {
+    (a<<30) as ::c_int | (b as ::c_int)<<8 | c as ::c_int | d<<16
+}
+
+pub const _IOC_NONE: ::c_uint = 0;
+pub const _IOC_WRITE: ::c_uint = 1;
+pub const _IOC_READ: ::c_uint = 2;
+
+pub fn _IO(a:u8,b:u8) -> ::c_int {
+    _IOC(_IOC_NONE,a,b,0)
+}
+
+pub fn _IOW<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_WRITE,a,b,size)
+}
+
+pub fn _IOR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ,a,b,size)
+}
+
+pub fn _IOWR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ|_IOC_WRITE,a,b,size)
+}
+
 pub const SIGSTKSZ: ::size_t = 8192;
 pub const MINSIGSTKSZ: ::size_t = 2048;
 
diff --git a/src/unix/linux_like/linux/musl/b32/mips/mod.rs b/src/unix/linux_like/linux/musl/b32/mips/mod.rs
index be11341683f15..10a6e892e7dab 100644
--- a/src/unix/linux_like/linux/musl/b32/mips/mod.rs
+++ b/src/unix/linux_like/linux/musl/b32/mips/mod.rs
@@ -163,6 +163,33 @@ s! {
     }
 }
 
+pub fn _IOC(a: ::c_uint, b: u8, c: u8, d: ::c_int) -> ::c_int {
+    (a<<29) as ::c_int | (b as ::c_int)<<8 | c as ::c_int | d<<16
+}
+
+pub const _IOC_NONE: ::c_uint = 1;
+pub const _IOC_READ: ::c_uint = 2;
+pub const _IOC_WRITE: ::c_uint = 4;
+
+pub fn _IO(a:u8,b:u8) -> ::c_int {
+    _IOC(_IOC_NONE,a,b,0)
+}
+
+pub fn _IOW<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_WRITE,a,b,size)
+}
+
+pub fn _IOR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ,a,b,size)
+}
+
+pub fn _IOWR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ|_IOC_WRITE,a,b,size)
+}
+
 pub const SIGSTKSZ: ::size_t = 8192;
 pub const MINSIGSTKSZ: ::size_t = 2048;
 
diff --git a/src/unix/linux_like/linux/musl/b32/powerpc.rs b/src/unix/linux_like/linux/musl/b32/powerpc.rs
index 6181b1cdc137e..df1a0a0690d2b 100644
--- a/src/unix/linux_like/linux/musl/b32/powerpc.rs
+++ b/src/unix/linux_like/linux/musl/b32/powerpc.rs
@@ -155,6 +155,33 @@ s! {
     }
 }
 
+pub fn _IOC(a: ::c_uint, b: u8, c: u8, d: ::c_int) -> ::c_int {
+    (a<<29) as ::c_int | (b as ::c_int)<<8 | c as ::c_int | d<<16
+}
+
+pub const _IOC_NONE: ::c_uint = 1;
+pub const _IOC_WRITE: ::c_uint = 4;
+pub const _IOC_READ: ::c_uint = 2;
+
+pub fn _IO(a:u8,b:u8) -> ::c_int {
+    _IOC(_IOC_NONE,a,b,0)
+}
+
+pub fn _IOW<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_WRITE,a,b,size)
+}
+
+pub fn _IOR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ,a,b,size)
+}
+
+pub fn _IOWR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ|_IOC_WRITE,a,b,size)
+}
+
 pub const MADV_SOFT_OFFLINE: ::c_int = 101;
 pub const SIGSTKSZ: ::size_t = 10240;
 pub const MINSIGSTKSZ: ::size_t = 4096;
diff --git a/src/unix/linux_like/linux/musl/b32/x86/mod.rs b/src/unix/linux_like/linux/musl/b32/x86/mod.rs
index fcd8ae4117b0b..2c2b38c51fa74 100644
--- a/src/unix/linux_like/linux/musl/b32/x86/mod.rs
+++ b/src/unix/linux_like/linux/musl/b32/x86/mod.rs
@@ -212,6 +212,33 @@ cfg_if! {
     }
 }
 
+pub fn _IOC(a: ::c_uint, b: u8, c: u8, d: ::c_int) -> ::c_int {
+    (a<<30) as ::c_int | (b as ::c_int)<<8 | c as ::c_int | (d<<16)
+}
+
+pub const _IOC_NONE: ::c_uint = 0;
+pub const _IOC_WRITE: ::c_uint = 1;
+pub const _IOC_READ: ::c_uint = 2;
+
+pub fn _IO(a:u8,b:u8) -> ::c_int {
+    _IOC(_IOC_NONE,a,b,0)
+}
+
+pub fn _IOW<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_WRITE,a,b,size)
+}
+
+pub fn _IOR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ,a,b,size)
+}
+
+pub fn _IOWR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ|_IOC_WRITE,a,b,size)
+}
+
 pub const SIGSTKSZ: ::size_t = 8192;
 pub const MINSIGSTKSZ: ::size_t = 2048;
 
diff --git a/src/unix/linux_like/linux/musl/b64/aarch64/mod.rs b/src/unix/linux_like/linux/musl/b64/aarch64/mod.rs
index 876ff3c8d746f..c90a887fc222e 100644
--- a/src/unix/linux_like/linux/musl/b64/aarch64/mod.rs
+++ b/src/unix/linux_like/linux/musl/b64/aarch64/mod.rs
@@ -62,6 +62,33 @@ s! {
     }
 }
 
+pub fn _IOC(a: ::c_uint, b: u8, c: u8, d: ::c_int) -> ::c_int {
+    (a<<30) as ::c_int | (b as ::c_int)<<8 | c | (d<<16)
+}
+
+pub const _IOC_NONE: ::c_uint = 0;
+pub const _IOC_WRITE: ::c_uint = 1;
+pub const _IOC_READ: ::c_uint = 2;
+
+pub fn _IO(a:u8,b:u8) -> ::c_int {
+    _IOC(_IOC_NONE,a,b,0)
+}
+
+pub fn _IOW<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_WRITE,a,b,size)
+}
+
+pub fn _IOR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ,a,b,size)
+}
+
+pub fn _IOWR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ|_IOC_WRITE,a,b,size)
+}
+
 pub const O_APPEND: ::c_int = 1024;
 pub const O_DIRECT: ::c_int = 0x10000;
 pub const O_DIRECTORY: ::c_int = 0x4000;
diff --git a/src/unix/linux_like/linux/musl/b64/mips64.rs b/src/unix/linux_like/linux/musl/b64/mips64.rs
index 2c410509fa76e..d698aed6eb498 100644
--- a/src/unix/linux_like/linux/musl/b64/mips64.rs
+++ b/src/unix/linux_like/linux/musl/b64/mips64.rs
@@ -97,6 +97,33 @@ s! {
     }
 }
 
+pub fn _IOC(a: ::c_uint, b: u8, c: u8, d: ::c_int) -> ::c_int {
+    (a<<29) as ::c_int | (b as ::c_int)<<8 | c as ::c_int | (d<<16)
+}
+
+pub const _IOC_NONE: ::c_uint = 1;
+pub const _IOC_READ: ::c_uint = 2;
+pub const _IOC_WRITE: ::c_uint = 4;
+
+pub fn _IO(a:u8,b:u8) -> ::c_int {
+    _IOC(_IOC_NONE,a,b,0)
+}
+
+pub fn _IOW<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_WRITE,a,b,size)
+}
+
+pub fn _IOR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ,a,b,size)
+}
+
+pub fn _IOWR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ|_IOC_WRITE,a,b,size)
+}
+
 pub const SIGSTKSZ: ::size_t = 8192;
 pub const MINSIGSTKSZ: ::size_t = 2048;
 
diff --git a/src/unix/linux_like/linux/musl/b64/powerpc64.rs b/src/unix/linux_like/linux/musl/b64/powerpc64.rs
index d27d703ad9c4c..eb02911e624ad 100644
--- a/src/unix/linux_like/linux/musl/b64/powerpc64.rs
+++ b/src/unix/linux_like/linux/musl/b64/powerpc64.rs
@@ -60,6 +60,33 @@ s! {
     }
 }
 
+pub fn _IOC(a: ::c_uint, b: u8, c: u8, d: ::c_int) -> ::c_int {
+    (a<<29) as ::c_int | (b as ::c_int)<<8 | c as ::c_int | (d<<16)
+}
+
+pub const _IOC_NONE: ::c_uint = 1;
+pub const _IOC_WRITE: ::c_uint = 4;
+pub const _IOC_READ: ::c_uint = 2;
+
+pub fn _IO(a:u8,b:u8) -> ::c_int {
+    _IOC(_IOC_NONE,a,b,0)
+}
+
+pub fn _IOW<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_WRITE,a,b,size)
+}
+
+pub fn _IOR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ,a,b,size)
+}
+
+pub fn _IOWR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ|_IOC_WRITE,a,b,size)
+}
+
 pub const MADV_SOFT_OFFLINE: ::c_int = 101;
 pub const MAP_32BIT: ::c_int = 0x0040;
 pub const O_APPEND: ::c_int = 1024;
diff --git a/src/unix/linux_like/linux/musl/b64/x86_64/mod.rs b/src/unix/linux_like/linux/musl/b64/x86_64/mod.rs
index ff9300c85f393..bedd0ae0b6529 100644
--- a/src/unix/linux_like/linux/musl/b64/x86_64/mod.rs
+++ b/src/unix/linux_like/linux/musl/b64/x86_64/mod.rs
@@ -245,6 +245,35 @@ cfg_if! {
     }
 }
 
+// ioctl macros from bits/ioctl.h (generic)
+
+pub fn _IOC(a: ::c_uint, b: u8, c: u8, d: ::c_int) -> ::c_int {
+    (a<<30) as ::c_int | (b as ::c_int)<<8 | c as ::c_int | d<<16
+}
+
+pub const _IOC_NONE: ::c_uint = 0;
+pub const _IOC_WRITE: ::c_uint = 1;
+pub const _IOC_READ: ::c_uint = 2;
+
+pub fn _IO(a:u8,b:u8) -> ::c_int {
+    _IOC(_IOC_NONE,a,b,0)
+}
+
+pub fn _IOW<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_WRITE,a,b,size)
+}
+
+pub fn _IOR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ,a,b,size)
+}
+
+pub fn _IOWR<T: Sized> (a:u8,b:u8) -> ::c_int {
+    let size = ::core::mem::size_of::<T>() as ::c_int;
+    _IOC(_IOC_READ|_IOC_WRITE,a,b,size)
+}
+
 // Syscall table
 
 pub const SYS_read: ::c_long = 0;