Date: Sun, 18 Jul 2010 00:11:50 +0200 From: Jilles Tjoelker <jilles@stack.nl> To: Alex Kozlov <spam@rm-rf.kiev.ua> Cc: freebsd-stable@freebsd.org Subject: Re: SIGEPIPE after update to 8.1-RC2 Message-ID: <20100717221150.GA18562@stack.nl> In-Reply-To: <20100717152455.GA61987@ravenloft.kiev.ua> References: <20100717152455.GA61987@ravenloft.kiev.ua>
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On Sat, Jul 17, 2010 at 06:24:55PM +0300, Alex Kozlov wrote: > After updating my buildbox from 26 April 8-STABLE > to 8.1-RC2 I constantly getting SIGEPIPE > portsnap: > Fetching 4 metadata patches... done. > Applying metadata patches... done. > Fetching 0 metadata files... done. > Fetching 27 patches.....10....20... done. > Applying patches... done. > Fetching 3 new ports or files... done. > sort: write failed: standard output: Broken pipe > sort: write error > Removing old files and directories... done. > sudo make -C /usr/ports/converters/ascii2binary: > ===> Patching for ascii2binary-2.13_2 > ===> Applying FreeBSD patches for ascii2binary-2.13_2 > ===> ascii2binary-2.13_2 depends on shared library: intlgrep: writing output: Broken pipe > grep: writing output: Broken pipe [snip repetition] > - found > ===> Configuring for ascii2binary-2.13_2 > Does anyone know something about this issue? This looks more like the absence of SIGPIPE than an inappropriate SIGPIPE. I can reproduce both of those error messages by running the commands with SIGPIPE ignored. grep(1) seems to behave strangely on write errors, not aborting, for example yes | { trap '' PIPE; grep -v foo; echo $? >&2; } | : prints an endless stream of error messages. Note that sh(1) silently ignores attempts to change the disposition of signals that were ignored on entry to the shell, so a trap - PIPE is unlikely to help you. Similarly, SIGPIPE may be blocked (masked). Few programs expect this. The -i and -j options in procstat should be helpful in finding what exactly is wrong with SIGPIPE. (These options are relatively new, but should be in 8.1.) -- Jilles Tjoelker
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