refactor: replace IOError with OSError

<https://peps.python.org/pep-3151/>

examples/when_ready.conf.py

@@ -17,7 +17,7 @@ def __init__(self, server, max_mem):
     def memory_usage(self, pid):
         try:
             out = commands.getoutput("ps -o rss -p %s" % pid)
-        except IOError:
+        except OSError:
             return -1
         used_mem = sum(int(x) for x in out.split('\n')[1:])
         return used_mem

gunicorn/arbiter.py

@@ -333,7 +333,7 @@ def wakeup(self):
         """
         try:
             os.write(self.PIPE[1], b'.')
-        except IOError as e:
+        except OSError as e:
             if e.errno not in [errno.EAGAIN, errno.EINTR]:
                 raise
 

gunicorn/debug.py

@@ -37,7 +37,7 @@ def __call__(self, frame, event, arg):
                 try:
                     src = inspect.getsourcelines(frame)
                     line = src[lineno]
-                except IOError:
+                except OSError:
                     line = 'Unknown code named [%s].  VM instruction #%d' % (
                         frame.f_code.co_name, frame.f_lasti)
             if self.trace_names is None or name in self.trace_names:

gunicorn/http/errors.py

@@ -14,7 +14,7 @@ class ParseException(Exception):
     pass
 
 
-class NoMoreData(IOError):
+class NoMoreData(OSError):
     def __init__(self, buf=None):
         self.buf = buf
 
@@ -82,15 +82,15 @@ def __str__(self):
         return "Unsupported transfer coding: %r" % self.hdr
 
 
-class InvalidChunkSize(IOError):
+class InvalidChunkSize(OSError):
     def __init__(self, data):
         self.data = data
 
     def __str__(self):
         return "Invalid chunk size: %r" % self.data
 
 
-class ChunkMissingTerminator(IOError):
+class ChunkMissingTerminator(OSError):
     def __init__(self, term):
         self.term = term
 

gunicorn/pidfile.py

@@ -80,7 +80,7 @@ def validate(self):
                     if e.args[0] == errno.ESRCH:
                         return
                     raise
-        except IOError as e:
+        except OSError as e:
             if e.args[0] == errno.ENOENT:
                 return
             raise

gunicorn/util.py

@@ -566,7 +566,7 @@ def check_is_writable(path):
     try:
         with open(path, 'a') as f:
             f.close()
-    except IOError as e:
+    except OSError as e:
         raise RuntimeError("Error: '%s' isn't writable [%r]" % (path, e))
 
 
@@ -587,7 +587,7 @@ def has_fileno(obj):
     # check BytesIO case and maybe others
     try:
         obj.fileno()
-    except (AttributeError, IOError, io.UnsupportedOperation):
+    except (AttributeError, OSError, io.UnsupportedOperation):
         return False
 
     return True

tests/test_pidfile.py

@@ -16,7 +16,7 @@ def builtin(name):
 @mock.patch(builtin('open'), new_callable=mock.mock_open)
 def test_validate_no_file(_open):
     pidfile = gunicorn.pidfile.Pidfile('test.pid')
-    _open.side_effect = IOError(errno.ENOENT)
+    _open.side_effect = OSError(errno.ENOENT)
     assert pidfile.validate() is None