On 04/30/2021 09:34 PM, Richard Purdie wrote:
On Tue, 2021-04-20 at 16:37 +0800, Chen Qi wrote:
oe-pkgdata-util sometimes outputs a large amount of data. When used
with pipe, it's likely to get the following error.
BrokenPipeError: [Errno 32] Broken pipe
The problem could be reproduced by running `oe-pkgdata-util list-pkg | less'.
Type 'q' after running the above command, and we get the error.
Signed-off-by: Chen Qi <qi.c...@windriver.com>
---
scripts/oe-pkgdata-util | 5 +++++
1 file changed, 5 insertions(+)
This is far from clearcut.
https://mail.python.org/pipermail/python-dev/2018-June/154191.html
Not quite sure what to do about this as there are pros/cons...
Cheers,
Richard
Thanks Richard. I've read the material above and grabbed more knowledge
on this topic.
At first, I also wanted to use the 'try ... except' clause to handle the
output of oe-pkgdata-utils. But there are multiple places for the
output, so I figured it's ugly and not necessary.
People mentioned situations where setting SIG_DFL for SIGPIPE is
harmful. That's true. But in respect to this oe-pkgutils-data program,
when setting SIG_DFL for SIGPIPE, what would be the actual problem in
practice?
So I think https://github.com/python/cpython/pull/6773 is meaningful,
but it does not apply to all programs.
Anyway, if you think using the 'try...except' clause is better, I could
do it and send out V2. But I'm still wondering what extra benefit it
could bring us.
Best Regards,
Chen Qi
diff --git a/scripts/oe-pkgdata-util b/scripts/oe-pkgdata-util
index 75dd23efa3..4aeb28879d 100755
--- a/scripts/oe-pkgdata-util
+++ b/scripts/oe-pkgdata-util
@@ -17,6 +17,7 @@ import re
import argparse
import logging
from collections import defaultdict, OrderedDict
+from signal import signal, SIGPIPE, SIG_DFL
scripts_path = os.path.dirname(os.path.realpath(__file__))
lib_path = scripts_path + '/lib'
@@ -615,6 +616,10 @@ def main():
logger.error('Unable to find pkgdata directory %s' % args.pkgdata_dir)
sys.exit(1)
+ # It's possible that this program will output large contents, and when
used with a pipe in command line,
+ # we will get a 'BrokenPipeError: [Errno 32] Broken pipe'. Ignore the
SIGPIPE to avoid such error.
+ signal(SIGPIPE, SIG_DFL)
+
ret = args.func(args)
return ret
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