-m pdb -p -- other side cannot read debug script due to too-strict permissions #134546
Description
Bug report
Bug description:
- run
python3.14 - find its pid
sudo python3.14 -m pdb -p $pid
the pdb tab will hang, the other side will display similar to:
Python 3.14.0b1 (main, May 8 2025, 08:57:13) [GCC 13.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> Can't open debugger script /tmp/tmpmbdwo7d_:
Traceback (most recent call last):
File "/usr/lib/python3.14/_pyrepl/unix_console.py", line 422, in wait
or bool(self.pollob.poll(timeout))
PermissionError: [Errno 13] Permission denied: '/tmp/tmpmbdwo7d_'
the debugger script needs to at least be readable by the unprivileged user to be opened:
$ ls -al /tmp/tmpmbdwo7d_
-rw------- 1 root root 190 May 22 16:51 /tmp/tmpmbdwo7d_
Line 3398 in 742d5b5
I believe a patch similar to this fixes it:
diff --git a/Lib/pdb.py b/Lib/pdb.py
index 78ee35f61bb..bb12d1baae8 100644
--- a/Lib/pdb.py
+++ b/Lib/pdb.py
@@ -75,6 +75,7 @@
import code
import glob
import json
+import stat
import token
import types
import atexit
@@ -3418,6 +3419,7 @@ def attach(pid, commands=()):
)
)
connect_script.close()
+ os.chmod(connect_script.name, os.stat(connect_script.name).st_mode | stat.S_IRGRP | stat.S_IROTH)
sys.remote_exec(pid, connect_script.name)
# TODO Add a timeout? Or don't bother since the user can ^C?CPython versions tested on:
3.14
Operating systems tested on:
Linux