bitbake: Revert "bitbake-layers: add signal hander to avoid exception"

This reverts commit 4fca9a07f2d6b0544977112672b786982d7bb8f2.

The default python handler is to ignore SIGPIPE errors yet by adding
this line, we see:

2020-09-23 22:10:20,325 - oe-selftest - INFO - recipetool.RecipetoolTests.test_recipetool_appendfile_subdir (subunit.RemotedTestCase)
2020-09-23 22:10:20,325 - oe-selftest - INFO -  ... FAIL
2020-09-23 22:10:20,325 - oe-selftest - INFO - 11: 30/44 227/415 (14.85s) (recipetool.RecipetoolTests.test_recipetool_appendfile_subdir)
2020-09-23 22:10:20,325 - oe-selftest - INFO - testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/home/pokybuild/yocto-worker/oe-selftest-ubuntu/build/meta/lib/oeqa/selftest/cases/recipetool.py", line 226, in test_recipetool_appendfile_subdir
    _, output = self._try_recipetool_appendfile('selftest-recipetool-appendfile', '/usr/share/selftest-replaceme-subdir', self.testfile, '', expectedlines, ['testfile'])
  File "/home/pokybuild/yocto-worker/oe-selftest-ubuntu/build/meta/lib/oeqa/selftest/cases/recipetool.py", line 85, in _try_recipetool_appendfile
    return self._try_recipetool_appendcmd(cmd, testrecipe, expectedfiles, expectedlines)
  File "/home/pokybuild/yocto-worker/oe-selftest-ubuntu/build/meta/lib/oeqa/selftest/cases/recipetool.py", line 49, in _try_recipetool_appendcmd
    bbappendfile = self._check_bbappend(testrecipe, recipefile, self.templayerdir)
  File "/home/pokybuild/yocto-worker/oe-selftest-ubuntu/build/meta/lib/oeqa/selftest/cases/devtool.py", line 186, in _check_bbappend
    result = runCmd('bitbake-layers show-appends', cwd=self.builddir)
  File "/home/pokybuild/yocto-worker/oe-selftest-ubuntu/build/meta/lib/oeqa/utils/commands.py", line 201, in runCmd
    raise AssertionError("Command '%s' returned non-zero exit status %d:\n%s" % (command, result.status, exc_output))
AssertionError: Command 'bitbake-layers show-appends' returned non-zero exit status 141:
NOTE: Reconnecting to bitbake server...

where status 141 is SIGPIPE.

We expect SIGPIPE not to be raised like this. I tried the commands in the original
commit to pipe through less with the change reverted and I don't see the error
shown. I therefore believe this is safe to revert.

(Bitbake rev: 94a18f1f2e51dd5d3928e6e0c17f2c19c8b5db49)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 0 insertions, 2 deletions

diff --git a/bitbake/bin/bitbake-layers b/bitbake/bin/bitbake-layers
index 149f1b1ac8..ff085d6744 100755
--- a/bitbake/bin/bitbake-layers
+++ b/bitbake/bin/bitbake-layers
@@ -14,7 +14,6 @@ import logging
 import os
 import sys
 import argparse
-import signal
 
 bindir = os.path.dirname(__file__)
 topdir = os.path.dirname(bindir)
@@ -26,7 +25,6 @@ import bb.msg
 logger = bb.msg.logger_create('bitbake-layers', sys.stdout)
 
 def main():
-    signal.signal(signal.SIGPIPE, signal.SIG_DFL)
     parser = argparse.ArgumentParser(
         description="BitBake layers utility",
         epilog="Use %(prog)s <subcommand> --help to get help on a specific command",