[#61992] Support mknod syscall

antmicro · Jul 5, 2024 · 366db8f · 366db8f
1 parent cde96d9
commit 366db8f
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Showing 3 changed files with 33 additions and 0 deletions.
diff --git a/c_lib/wasi_ext_lib.c b/c_lib/wasi_ext_lib.c
@@ -343,3 +343,17 @@ int wasi_ext_fcntl(int fd, enum FcntlCommand cmd, void *arg) {
 
     return -EINVAL;
 }
+
+int wasi_ext_mknod(const char *path, int dev) {
+    JsonNode *root = json_mkobject();
+    json_append_member(root, "path", json_mkstring(path));
+    json_append_member(root, "dev", json_mknumber(dev));
+
+    char *serialized = json_stringify(0, root, " ");
+    json_delete(root);
+
+    int err = __syscall("mknod", serialized, NULL, 0);
+    free(serialized);
+
+    return err;
+}
diff --git a/c_lib/wasi_ext_lib.h b/c_lib/wasi_ext_lib.h
@@ -48,6 +48,8 @@
 #define WASI_EXT_FDFLAG_MASK ((__wasi_fdflags_t)0xffc0)
 #define WASI_EXT_FDFLAG_CLOEXEC ((__wasi_fdflags_t)0x0040)
 
+#define MKDEV(maj, min) ((maj << 20) | min)
+
 // Fnctl commands
 enum FcntlCommand { F_MVFD, F_GETFD, F_SETFD };
 
@@ -108,5 +110,6 @@ int wasi_ext_fcntl(int, enum FcntlCommand, void *);
 int wasi_ext_mount(int, const char *, int, const char *, const char *, uint64_t,
                    const char *);
 int wasi_ext_umount(const char *);
+int wasi_ext_mknod(const char *, int);
 
 #endif
diff --git a/src/lib.rs b/src/lib.rs
@@ -419,6 +419,22 @@ pub fn umount(path: &str) -> Result<(), ExitCode> {
     }
 }
 
+pub fn mkdev(maj: i32, min: i32) -> i32 {
+    (maj << 20) | min
+}
+
+pub fn mknod(path: &str, dev: i32) -> Result<(), ExitCode> {
+    let c_path = CString::new(path).unwrap();
+
+    let result = unsafe { wasi_ext_lib_generated::wasi_ext_mknod(c_path.as_ptr(), dev) };
+
+    if result == 0 {
+        Ok(())
+    } else {
+        Err(result)
+    }
+}
+
 pub fn tcgetattr(fd: Fd) -> Result<termios::termios, ExitCode> {
     let mut termios_p: termios::termios = unsafe { mem::zeroed() };
     let result = unsafe {