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From: Eric Wong <e@80x24.org>
To: meta@public-inbox.org
Subject: [PATCH 1/4] lei: clobber recvmsg buffer on errors
Date: Mon, 18 Apr 2022 09:50:01 +0000	[thread overview]
Message-ID: <20220418095004.466-2-e@80x24.org> (raw)
In-Reply-To: <20220418095004.466-1-e@80x24.org>

It will be necessary when we drop the Inline::C requirement
since the pure Perl Linux syscall recvmsg implementation.

This likely would've caused errors for Socket::MsgHdr users
without Inline::C, but I haven't tested it since it's a rare
configuration.
---
 lib/PublicInbox/LEI.pm           | 1 +
 lib/PublicInbox/LeiSelfSocket.pm | 1 +
 2 files changed, 2 insertions(+)

diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index a7ddc21f..9ab91714 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -1149,6 +1149,7 @@ sub event_step {
 		if (scalar(@fds) == 1 && !defined($fds[0])) {
 			return if $! == EAGAIN;
 			die "recvmsg: $!" if $! != ECONNRESET;
+			$buf = '';
 			@fds = (); # for open loop below:
 		}
 		for (@fds) { open my $rfh, '+<&=', $_ }
diff --git a/lib/PublicInbox/LeiSelfSocket.pm b/lib/PublicInbox/LeiSelfSocket.pm
index dd64b6cf..860020cb 100644
--- a/lib/PublicInbox/LeiSelfSocket.pm
+++ b/lib/PublicInbox/LeiSelfSocket.pm
@@ -29,6 +29,7 @@ sub event_step {
 	if (scalar(@fds) == 1 && !defined($fds[0])) {
 		return if $!{EAGAIN};
 		die "recvmsg: $!" unless $!{ECONNRESET};
+		$buf = '';
 	} else { # just in case open so perl can auto-close them:
 		for (@fds) { open my $fh, '+<&=', $_ };
 	}

  reply	other threads:[~2022-04-18  9:50 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-18  9:50 [PATCH 0/4] lei: finish wiring up pure-Perl stuff for Linux Eric Wong
2022-04-18  9:50 ` Eric Wong [this message]
2022-04-18  9:50 ` [PATCH 2/4] syscall: more idiomatic cmsghdr space allocation Eric Wong
2022-04-18  9:50 ` [PATCH 3/4] lei: wire up pure Perl sendmsg/recvmsg for Linux users Eric Wong
2022-04-18  9:50 ` [PATCH 4/4] syscall: golf + more idiomatic buffer initialization Eric Wong

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