replace magic numbers with errno.*

copyparty/httpcli.py

@@ -5,6 +5,7 @@ import argparse  # typechk
 import base64
 import calendar
 import copy
+import errno
 import gzip
 import itertools
 import json
@@ -1290,10 +1291,10 @@ class HttpCli(object):
             except OSError as ex:
                 self.log("makedirs failed [{}]".format(dst))
                 if not bos.path.isdir(dst):
-                    if ex.errno == 13:
+                    if ex.errno == errno.EACCES:
                         raise Pebkac(500, "the server OS denied write-access")
 
-                    if ex.errno == 17:
+                    if ex.errno == errno.EEXIST:
                         raise Pebkac(400, "some file got your folder name")
 
                     raise Pebkac(500, min_ex())
@@ -1544,7 +1545,7 @@ class HttpCli(object):
             try:
                 bos.mkdir(fn)
             except OSError as ex:
-                if ex.errno == 13:
+                if ex.errno == errno.EACCES:
                     raise Pebkac(500, "the server OS denied write-access")
 
                 raise Pebkac(500, "mkdir failed:\n" + min_ex())
@@ -1862,7 +1863,7 @@ class HttpCli(object):
             srv_lastmod = st.st_mtime
             srv_lastmod3 = int(srv_lastmod * 1000)
         except OSError as ex:
-            if ex.errno != 2:
+            if ex.errno != errno.ENOENT:
                 raise
 
         # if file exists, chekc that timestamp matches the client's

copyparty/httpsrv.py

@@ -35,6 +35,7 @@ from .util import (
     FHC,
     Garda,
     Magician,
+    E_SCK,
     min_ex,
     shut_socket,
     spack,
@@ -332,7 +333,7 @@ class HttpSrv(object):
             cli.run()
 
         except (OSError, socket.error) as ex:
-            if ex.errno not in [10038, 10054, 107, 57, 49, 9]:
+            if ex.errno not in E_SCK:
                 self.log(
                     "%s %s" % addr,
                     "run({}): {}".format(fno, ex),
@@ -354,13 +355,7 @@ class HttpSrv(object):
                         "shut({}): {}".format(fno, ex),
                         c="1;30",
                     )
-                if ex.errno not in [10038, 10054, 107, 57, 49, 9]:
+                if ex.errno not in E_SCK:
-                    # 10038 No longer considered a socket
-                    # 10054 Foribly closed by remote
-                    #   107 Transport endpoint not connected
-                    #    57 Socket is not connected
-                    #    49 Can't assign requested address (wifi down)
-                    #     9 Bad file descriptor
                     raise
             finally:
                 with self.mutex:

copyparty/tcpsrv.py

@@ -8,7 +8,15 @@ import sys
 
 from .__init__ import ANYWIN, MACOS, PY2, TYPE_CHECKING, VT100, unicode
 from .stolen.qrcodegen import QrCode
-from .util import chkcmd, sunpack, termsize
+from .util import (
+    E_ACCESS,
+    E_ADDR_IN_USE,
+    E_ADDR_NOT_AVAIL,
+    E_UNREACH,
+    chkcmd,
+    sunpack,
+    termsize,
+)
 
 if TYPE_CHECKING:
     from .svchub import SvcHub
@@ -133,9 +141,9 @@ class TcpSrv(object):
             srv.bind((ip, port))
             self.srv.append(srv)
         except (OSError, socket.error) as ex:
-            if ex.errno in [98, 48]:
+            if ex.errno in E_ADDR_IN_USE:
                 e = "\033[1;31mport {} is busy on interface {}\033[0m".format(port, ip)
-            elif ex.errno in [99, 49]:
+            elif ex.errno in E_ADDR_NOT_AVAIL:
                 e = "\033[1;31minterface {} does not exist\033[0m".format(ip)
             else:
                 raise
@@ -321,9 +329,9 @@ class TcpSrv(object):
                 default_route = s.getsockname()[0]
                 break
             except (OSError, socket.error) as ex:
-                if ex.errno == 13:
+                if ex.errno in E_ACCESS:
                     self.log("tcpsrv", "eaccess {} (trying next)".format(ip))
-                elif ex.errno not in [101, 10065, 10051]:
+                elif ex.errno not in E_UNREACH:
                     self.log("tcpsrv", "route lookup failed; err {}".format(ex.errno))
 
         s.close()

copyparty/up2k.py

@@ -2,6 +2,7 @@
 from __future__ import print_function, unicode_literals
 
 import base64
+import errno
 import gzip
 import hashlib
 import json
@@ -2670,7 +2671,7 @@ class Up2k(object):
         try:
             atomic_move(sabs, dabs)
         except OSError as ex:
-            if ex.errno != 18:
+            if ex.errno != errno.EXDEV:
                 raise
 
             self.log("cross-device move:\n  {}\n  {}".format(sabs, dabs))

copyparty/util.py

@@ -3,6 +3,7 @@ from __future__ import print_function, unicode_literals
 
 import base64
 import contextlib
+import errno
 import hashlib
 import hmac
 import math
@@ -29,6 +30,28 @@ from .__init__ import ANYWIN, MACOS, PY2, TYPE_CHECKING, VT100, WINDOWS
 from .__version__ import S_BUILD_DT, S_VERSION
 from .stolen import surrogateescape
 
+
+def _ens(want: str) -> tuple[int, ...]:
+    ret: list[int] = []
+    for v in want.split():
+        try:
+            ret.append(getattr(errno, v))
+        except:
+            pass
+
+    return tuple(ret)
+
+
+# WSAECONNRESET - foribly closed by remote
+# WSAENOTSOCK - no longer a socket
+# EUNATCH - can't assign requested address (wifi down)
+E_SCK = _ens("ENOTCONN EUNATCH EBADF WSAENOTSOCK WSAECONNRESET")
+E_ADDR_NOT_AVAIL = _ens("EADDRNOTAVAIL WSAEADDRNOTAVAIL")
+E_ADDR_IN_USE = _ens("EADDRINUSE WSAEADDRINUSE")
+E_ACCESS = _ens("EACCES WSAEACCES")
+E_UNREACH = _ens("EHOSTUNREACH WSAEHOSTUNREACH ENETUNREACH WSAENETUNREACH")
+
+
 try:
     import ctypes
     import fcntl
@@ -1020,7 +1043,7 @@ def ren_open(
         except OSError as ex_:
             ex = ex_
 
-            if ex.errno == 22 and not asciified:
+            if ex.errno == errno.EINVAL and not asciified:
                 asciified = True
                 bname, fname = [
                     zs.encode("ascii", "replace").decode("ascii").replace("?", "_")
@@ -1028,7 +1051,10 @@ def ren_open(
                 ]
                 continue
 
-            if ex.errno not in [36, 63, 95] and (not WINDOWS or ex.errno != 22):
+            # ENOTSUP: zfs on ubuntu 20.04
+            if ex.errno not in (errno.ENAMETOOLONG, errno.ENOSR, errno.ENOTSUP) and (
+                not WINDOWS or ex.errno != errno.EINVAL
+            ):
                 raise
 
         if not b64:
@@ -1884,8 +1910,8 @@ def sendfile_kern(
             stuck = 0
         except OSError as ex:
             d = time.time() - stuck
-            log("sendfile stuck for {:.3f} sec: {!r}".format(d, ex))
+            log("sendfile stuck for {:.3f} sec: {!r}".format(d, ex), "90")
-            if d < 3600 and ex.errno == 11:  # eagain
+            if d < 3600 and ex.errno == errno.EWOULDBLOCK:
                 continue
 
             n = 0