fix get_file() checking relative paths (#3386)

* fix get_file() handling of relative paths

* aglib get_file test

* fix typo

* lint formatting

pwndbg/aglib/file.py

@@ -82,10 +82,6 @@ def get_file(path: str, try_local_path: bool = False) -> str:
         The local path to the file
     """
     has_target_prefix = path.startswith("target:")
-    has_good_prefix = path.startswith(("/", "./", "../")) or has_target_prefix
-    if not has_good_prefix:
-        raise OSError("get_file called with incorrect path", errno.ENOENT)
-
     if has_target_prefix:
         path = path[7:]  # len('target:') == 7
 

tests/library/gdb/tests/test_file.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+import os
+import tempfile
+
+from pwndbg.aglib.file import get
+
+
+def test_get():
+    # Test different relative and absolute file path prefixes
+    cwd = os.getcwd()
+    test_file_prefixes = ["/", "./", f"../{os.path.basename(cwd)}/", ""]
+    with tempfile.TemporaryDirectory(dir=cwd) as tempdir:
+        path = os.path.join(tempdir, "test_file")
+        with open(path, "w") as f:
+            f.write("test")
+        for test_prefix in test_file_prefixes:
+            test_path = path if test_prefix == "/" else test_prefix + os.path.relpath(path)
+            assert get(test_path) == b"test"