[#45267] Update ioctl magic numbers

antmicro · Jul 19, 2023 · e91b54a · e91b54a
1 parent fb10025
commit e91b54a
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Showing 3 changed files with 27 additions and 26 deletions.
diff --git a/c_lib/wasi_ext_lib.c b/c_lib/wasi_ext_lib.c
@@ -248,20 +248,16 @@ int wasi_ext_kill(int pid, int sig) {
     return -err;
 }
 
-int wasi_ext_ioctl(int fd, unsigned long cmd, void *arg, size_t arg_size) {
-    char *ptr;
-    asprintf(&ptr, "%p", arg);
-
+int wasi_ext_ioctl(int fd, unsigned int cmd, void *arg) {
     JsonNode *root = json_mkobject();
     json_append_member(root, "fd", json_mknumber(fd));
     json_append_member(root, "cmd", json_mknumber(cmd));
 
     char *serialized = json_stringify(0, root, " ");
     json_delete(root);
 
-    int err = __syscall("ioctl", serialized, arg, arg_size);
+    int err = __syscall("ioctl", serialized, arg, 0);
 
-    free(ptr);
     free(serialized);
 
     return -err;

diff --git a/c_lib/wasi_ext_lib.h b/c_lib/wasi_ext_lib.h
@@ -6,8 +6,23 @@
 #ifndef c_bindings_wasi_ext_lib_h_INCLUDED
 #define c_bindings_wasi_ext_lib_h_INCLUDED
 
+#define _IOC_NONE 0U
+#define _IOC_WRITE 1U
+#define _IOC_READ 2U
+
+#define _IOC(rw, maj, func, size) (rw << 30 | size << 14 | maj << 8 | func)
+#define _IO(maj, func) _IOC(_IOC_NONE, maj, func, 0)
+#define _IOW(maj, func, size) _IOC(_IOC_WRITE, maj, func, size)
+#define _IOR(maj, func, size) _IOC(_IOC_READ, maj, func, size)
+#define _IOWR(maj, func, size) _IOC(_IOC_WRITE | _IOC_READ, maj, func, size)
+
 #include <stdlib.h>
 
+// Ioctl magic numbers
+const unsigned int TIOCGWINSZ = _IOR(1, 0, 8);
+const unsigned int TIOCSRAW = _IOW(1, 1, 4);
+const unsigned int TIOCSECHO = _IOW(1, 2, 4);
+
 enum RedirectType { READ, WRITE, APPEND };
 
 struct Redirect {
@@ -20,11 +35,6 @@ struct Env {
     const char *val;
 };
 
-// Ioctl magic numbers
-const uint64_t GET_SCREEN_SIZE = 0;
-const uint64_t SET_RAW = 1;
-const uint64_t SET_ECHO = 2;
-
 #ifdef HTERM
 typedef uint32_t WasiEvents;
 const size_t WASI_EVENTS_NUM = 2;
@@ -49,6 +59,6 @@ int wasi_ext_spawn(const char *, const char *const *, size_t,
                    const struct Env *, size_t, int, const struct Redirect *,
                    size_t n_redirects, int *);
 int wasi_ext_kill(int, int);
-int wasi_ext_ioctl(int, unsigned long, void *, size_t);
+int wasi_ext_ioctl(int, unsigned int, void *);
 
 #endif
diff --git a/src/lib.rs b/src/lib.rs
@@ -9,9 +9,8 @@ use std::collections::HashMap;
 use std::convert::AsRef;
 use std::convert::From;
 use std::env;
-use std::ffi::{c_ulong, c_void, CString};
+use std::ffi::{c_uint, c_void, CString};
 use std::fs;
-use std::mem;
 use std::os::wasi::ffi::OsStrExt;
 use std::os::wasi::prelude::RawFd;
 use std::path::Path;
@@ -22,7 +21,8 @@ mod wasi_ext_lib_generated;
 
 #[cfg(feature = "hterm")]
 pub use wasi_ext_lib_generated::{
-    WasiEvents, WASI_EVENTS_MASK_SIZE, WASI_EVENTS_NUM, WASI_EVENT_SIGINT, WASI_EVENT_WINCH,
+    WasiEvents, TIOCGWINSZ, TIOCSECHO, TIOCSRAW, WASI_EVENTS_MASK_SIZE, WASI_EVENTS_NUM,
+    WASI_EVENT_SIGINT, WASI_EVENT_WINCH,
 };
 
 pub use wasi::SIGNAL_KILL;
@@ -36,11 +36,11 @@ pub enum Redirect<'a> {
     Append((wasi::Fd, &'a str)),
 }
 
-#[repr(u64)]
+#[repr(u32)]
 pub enum IoctlNum {
-    GetScreenSize = wasi_ext_lib_generated::GET_SCREEN_SIZE,
-    SetRaw = wasi_ext_lib_generated::SET_RAW,
-    SetEcho = wasi_ext_lib_generated::SET_ECHO,
+    GetScreenSize = wasi_ext_lib_generated::TIOCGWINSZ,
+    SetRaw = wasi_ext_lib_generated::TIOCSRAW,
+    SetEcho = wasi_ext_lib_generated::TIOCSECHO,
 }
 
 enum CStringRedirect {
@@ -276,17 +276,12 @@ pub fn ioctl<T>(fd: RawFd, command: IoctlNum, arg: Option<&mut T>) -> Result<(),
     let result = if let Some(arg) = arg {
         unsafe {
             let arg_ptr: *mut c_void = arg as *mut T as *mut c_void;
-            wasi_ext_lib_generated::wasi_ext_ioctl(
-                fd,
-                command as c_ulong,
-                arg_ptr,
-                mem::size_of::<T>(),
-            )
+            wasi_ext_lib_generated::wasi_ext_ioctl(fd, command as c_uint, arg_ptr)
         }
     } else {
         unsafe {
             let null_ptr = ptr::null_mut::<T>() as *mut c_void;
-            wasi_ext_lib_generated::wasi_ext_ioctl(fd, command as c_ulong, null_ptr, 0)
+            wasi_ext_lib_generated::wasi_ext_ioctl(fd, command as c_uint, null_ptr)
         }
     };