Auto merge of #2106 - coolreader18:uinput-structs, r=coolreader18

Add structs from linux/uinput.h + a couple of input-related constants

I could also add the full constant list from `input-event-codes.h`, but that's about 1000 lines of constants and it's not necessary to interact with the ioctls, just to interpret the values they return/accept. Also, I made the `_CNT` constants usize instead of u16 since they're intended to be buffer lengths, not actual `input_event.code` (or whatever else) values.

libc-test/build.rs

@@ -2426,6 +2426,7 @@ fn test_linux(target: &str) {
         "linux/rtnetlink.h",
         "linux/seccomp.h",
         "linux/sockios.h",
+        "linux/uinput.h",
         "linux/vm_sockets.h",
         "linux/wait.h",
         "sys/fanotify.h",
@@ -2513,6 +2514,10 @@ fn test_linux(target: &str) {
         if ty.starts_with("__c_anonymous_") {
             return true;
         }
+        // FIXME: musl CI has old headers
+        if (musl || sparc64) && ty.starts_with("uinput_") {
+            return true;
+        }
         match ty {
             // These cannot be tested when "resolv.h" is included and are tested
             // in the `linux_elf.rs` file.
@@ -2674,6 +2679,12 @@ fn test_linux(target: &str) {
             // FIXME: Requires recent kernel headers (5.8):
             "STATX_MNT_ID" => true,
 
+            // FIXME: requires more recent kernel headers on CI
+            | "UINPUT_VERSION"
+            | "SW_MAX"
+            | "SW_CNT"
+                if musl || mips || ppc64 || riscv64 || sparc64 => true,
+
             _ => false,
         }
     });

src/unix/linux_like/linux/mod.rs

@@ -284,6 +284,24 @@ s! {
         pub u: [u32; 7],
     }
 
+    pub struct uinput_ff_upload {
+        pub request_id: ::__u32,
+        pub retval: ::__s32,
+        pub effect: ff_effect,
+        pub old: ff_effect,
+    }
+
+    pub struct uinput_ff_erase {
+        pub request_id: ::__u32,
+        pub retval: ::__s32,
+        pub effect_id: ::__u32,
+    }
+
+    pub struct uinput_abs_setup {
+        pub code: ::__u16,
+        pub absinfo: input_absinfo,
+    }
+
     pub struct dl_phdr_info {
         #[cfg(target_pointer_width = "64")]
         pub dlpi_addr: Elf64_Addr,
@@ -557,6 +575,22 @@ s_no_extra_traits! {
         pub salg_name: [::c_uchar; 64],
     }
 
+    pub struct uinput_setup {
+        pub id: input_id,
+        pub name: [::c_char; UINPUT_MAX_NAME_SIZE],
+        pub ff_effects_max: ::__u32,
+    }
+
+    pub struct uinput_user_dev {
+        pub name: [::c_char; UINPUT_MAX_NAME_SIZE],
+        pub id: input_id,
+        pub ff_effects_max: ::__u32,
+        pub absmax: [::__s32; ABS_CNT],
+        pub absmin: [::__s32; ABS_CNT],
+        pub absfuzz: [::__s32; ABS_CNT],
+        pub absflat: [::__s32; ABS_CNT],
+    }
+
     /// WARNING: The `PartialEq`, `Eq` and `Hash` implementations of this
     /// type are unsound and will be removed in the future.
     #[deprecated(
@@ -827,6 +861,72 @@ cfg_if! {
             }
         }
 
+        impl PartialEq for uinput_setup {
+            fn eq(&self, other: &uinput_setup) -> bool {
+                self.id == other.id
+                    && self.name[..] == other.name[..]
+                    && self.ff_effects_max == other.ff_effects_max
+           }
+        }
+        impl Eq for uinput_setup {}
+
+        impl ::fmt::Debug for uinput_setup {
+            fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
+                f.debug_struct("uinput_setup")
+                    .field("id", &self.id)
+                    .field("name", &&self.name[..])
+                    .field("ff_effects_max", &self.ff_effects_max)
+                    .finish()
+            }
+        }
+
+        impl ::hash::Hash for uinput_setup {
+            fn hash<H: ::hash::Hasher>(&self, state: &mut H) {
+                self.id.hash(state);
+                self.name.hash(state);
+                self.ff_effects_max.hash(state);
+            }
+        }
+
+        impl PartialEq for uinput_user_dev {
+            fn eq(&self, other: &uinput_user_dev) -> bool {
+                 self.name[..] == other.name[..]
+                    && self.id == other.id
+                    && self.ff_effects_max == other.ff_effects_max
+                    && self.absmax[..] == other.absmax[..]
+                    && self.absmin[..] == other.absmin[..]
+                    && self.absfuzz[..] == other.absfuzz[..]
+                    && self.absflat[..] == other.absflat[..]
+           }
+        }
+        impl Eq for uinput_user_dev {}
+
+        impl ::fmt::Debug for uinput_user_dev {
+            fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
+                f.debug_struct("uinput_setup")
+                    .field("name", &&self.name[..])
+                    .field("id", &self.id)
+                    .field("ff_effects_max", &self.ff_effects_max)
+                    .field("absmax", &&self.absmax[..])
+                    .field("absmin", &&self.absmin[..])
+                    .field("absfuzz", &&self.absfuzz[..])
+                    .field("absflat", &&self.absflat[..])
+                    .finish()
+            }
+        }
+
+        impl ::hash::Hash for uinput_user_dev {
+            fn hash<H: ::hash::Hasher>(&self, state: &mut H) {
+                self.name.hash(state);
+                self.id.hash(state);
+                self.ff_effects_max.hash(state);
+                self.absmax.hash(state);
+                self.absmin.hash(state);
+                self.absfuzz.hash(state);
+                self.absflat.hash(state);
+            }
+        }
+
         #[allow(deprecated)]
         impl af_alg_iv {
             fn as_slice(&self) -> &[u8] {
@@ -2471,6 +2571,38 @@ pub const IN_ALL_EVENTS: u32 = IN_ACCESS
 pub const IN_CLOEXEC: ::c_int = O_CLOEXEC;
 pub const IN_NONBLOCK: ::c_int = O_NONBLOCK;
 
+// linux/input.h
+pub const FF_MAX: ::__u16 = 0x7f;
+pub const FF_CNT: usize = FF_MAX as usize + 1;
+
+// linux/input-event-codes.h
+pub const INPUT_PROP_MAX: ::__u16 = 0x1f;
+pub const INPUT_PROP_CNT: usize = INPUT_PROP_MAX as usize + 1;
+pub const EV_MAX: ::__u16 = 0x1f;
+pub const EV_CNT: usize = EV_MAX as usize + 1;
+pub const SYN_MAX: ::__u16 = 0xf;
+pub const SYN_CNT: usize = SYN_MAX as usize + 1;
+pub const KEY_MAX: ::__u16 = 0x2ff;
+pub const KEY_CNT: usize = KEY_MAX as usize + 1;
+pub const REL_MAX: ::__u16 = 0x0f;
+pub const REL_CNT: usize = REL_MAX as usize + 1;
+pub const ABS_MAX: ::__u16 = 0x3f;
+pub const ABS_CNT: usize = ABS_MAX as usize + 1;
+pub const SW_MAX: ::__u16 = 0x10;
+pub const SW_CNT: usize = SW_MAX as usize + 1;
+pub const MSC_MAX: ::__u16 = 0x07;
+pub const MSC_CNT: usize = MSC_MAX as usize + 1;
+pub const LED_MAX: ::__u16 = 0x0f;
+pub const LED_CNT: usize = LED_MAX as usize + 1;
+pub const REP_MAX: ::__u16 = 0x01;
+pub const REP_CNT: usize = REP_MAX as usize + 1;
+pub const SND_MAX: ::__u16 = 0x07;
+pub const SND_CNT: usize = SND_MAX as usize + 1;
+
+// linux/uinput.h
+pub const UINPUT_VERSION: ::c_uint = 5;
+pub const UINPUT_MAX_NAME_SIZE: usize = 80;
+
 // uapi/linux/fanotify.h
 pub const FAN_ACCESS: u64 = 0x0000_0001;
 pub const FAN_MODIFY: u64 = 0x0000_0002;