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tools: ynl: handle broken pipe gracefully in CLI

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When sending YNL CLI output into a pipe, closing the pipe causes a
BrokenPipeError. E.g. running the following and quitting less:

./tools/net/ynl/pyynl/cli.py --family rt-link --dump getlink | less
Traceback (most recent call last):
  File "/home/donaldh/net-next/./tools/net/ynl/pyynl/cli.py", line 160, in <module>
    main()
    ~~~~^^
  File "/home/donaldh/net-next/./tools/net/ynl/pyynl/cli.py", line 142, in main
    output(reply)
    ~~~~~~^^^^^^^
  File "/home/donaldh/net-next/./tools/net/ynl/pyynl/cli.py", line 97, in output
    pprint.PrettyPrinter().pprint(msg)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^
[...]
BrokenPipeError: [Errno 32] Broken pipe

Consolidate the try block for ops and notifications, and gracefully
handle the BrokenPipeError by adding an exception handler to the
consolidated try block.

Signed-off-by: Donald Hunter <donald.hunter@gmail.com>
Link: https://patch.msgid.link/20250508112102.63539-1-donald.hunter@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Donald Hunter 2025-05-08 12:21:02 +01:00 committed by Jakub Kicinski
parent 1b2900db01
commit 0df6932485
1 changed files with 8 additions and 7 deletions
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11
tools/net/ynl/pyynl/cli.py
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@ -144,16 +144,17 @@ def main():
ops = [ (item[0], json.loads(item[1]), args.flags or []) for item in args.multi ]
reply = ynl.do_multi(ops)
output(reply)
if args.ntf:
for msg in ynl.poll_ntf(duration=args.duration):
output(msg)
except NlError as e:
print(e)
exit(1)
if args.ntf:
try:
for msg in ynl.poll_ntf(duration=args.duration):
output(msg)
except KeyboardInterrupt:
pass
except BrokenPipeError:
pass
if __name__ == "__main__":