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Improve error message when sudo's use_pty option is enabled.

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If sudo's use_pty is enabled, the setsid() call in firewall.py will
fail (see #664). When I ignore the error, sshuttle does not behave
properly. This patch explains to the user what is happening and
suggests a workaround.

It might be possible to make sshuttle work with use_pty in the future.
This commit is contained in:
Scott Kuhl 2021-07-29 11:49:09 -04:00
parent bd00a530dd
commit 68a7766d24
1 changed files with 8 additions and 1 deletions
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9
sshuttle/firewall.py
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@ -70,7 +70,14 @@ def setup_daemon():
# ctrl-c shouldn't be passed along to me. When the main sshuttle dies,
# I'll die automatically.
os.setsid()
try:
os.setsid()
except OSError:
raise Fatal("setsid() failed. This may occur if you are using sudo's "
"use_pty option. sshuttle does not currently work with "
"this option. An imperfect workaround: Run the sshuttle "
"command with sudo instead of running it as a regular "
"user and entering the sudo password when prompted.")
# because of limitations of the 'su' command, the *real* stdin/stdout
# are both attached to stdout initially. Clone stdout into stdin so we