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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Martin Wilck <mwilck@suse.com>
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Date: Fri, 12 Aug 2022 18:58:15 +0200
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Subject: [PATCH] multipathd: replace libreadline with libedit
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Linking multipathd with libreadline may cause a license conflict,
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because libreadline is licensed under GPL-3.0-or-later, and
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libmultipath contains several files under GPL-2.0.
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See:
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https://github.com/opensvc/multipath-tools/issues/36
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https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=979095
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https://www.gnu.org/licenses/gpl-faq.html#AllCompatibility
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Replace the readline functionality with libedit, which comes under
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a BSD license. The readline library can still be enabled (e.g. for
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binaries not intended to be distributed) by running
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"make READLINE=libreadline".
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Signed-off-by: Martin Wilck <mwilck@suse.com>
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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---
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Makefile.inc | 5 +++++
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multipathd/Makefile | 11 ++++++++++-
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multipathd/cli.c | 5 +++++
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multipathd/uxclnt.c | 6 ++++++
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4 files changed, 26 insertions(+), 1 deletion(-)
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diff --git a/Makefile.inc b/Makefile.inc
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index 25c16f4e..d471f045 100644
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--- a/Makefile.inc
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+++ b/Makefile.inc
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@@ -14,6 +14,11 @@
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#
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# Uncomment to disable dmevents polling support
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# ENABLE_DMEVENTS_POLL = 0
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+#
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+# Readline library to use, libedit or libreadline
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+# Caution: Using libreadline may make the multipathd binary undistributable,
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+# see https://github.com/opensvc/multipath-tools/issues/36
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+READLINE = libedit
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ifeq ($(TOPDIR),)
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TOPDIR = ..
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diff --git a/multipathd/Makefile b/multipathd/Makefile
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index 835edd93..4874ec3a 100644
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--- a/multipathd/Makefile
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+++ b/multipathd/Makefile
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@@ -15,7 +15,16 @@ CFLAGS += $(BIN_CFLAGS) -I$(multipathdir) -I$(mpathpersistdir) \
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LDFLAGS += $(BIN_LDFLAGS)
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LIBDEPS += -L$(multipathdir) -lmultipath -L$(mpathpersistdir) -lmpathpersist \
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-L$(mpathcmddir) -lmpathcmd -ludev -ldl -lurcu -lpthread \
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- -ldevmapper -lreadline
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+ -ldevmapper
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+
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+ifeq ($(READLINE),libedit)
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+CFLAGS += -DUSE_LIBEDIT
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+LIBDEPS += -ledit
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+endif
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+ifeq ($(READLINE),libreadline)
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+CFLAGS += -DUSE_LIBREADLINE
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+LIBDEPS += -lreadline
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+endif
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ifdef SYSTEMD
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CFLAGS += -DUSE_SYSTEMD=$(SYSTEMD)
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diff --git a/multipathd/cli.c b/multipathd/cli.c
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index bdc9fb10..85d73dfb 100644
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--- a/multipathd/cli.c
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+++ b/multipathd/cli.c
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@@ -11,7 +11,12 @@
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#include "parser.h"
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#include "util.h"
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#include "version.h"
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+#ifdef USE_LIBEDIT
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+#include <editline/readline.h>
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+#endif
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+#ifdef USE_LIBREADLINE
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#include <readline/readline.h>
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+#endif
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#include "mpath_cmd.h"
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#include "cli.h"
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diff --git a/multipathd/uxclnt.c b/multipathd/uxclnt.c
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index f16a7309..2c17d8fc 100644
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--- a/multipathd/uxclnt.c
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+++ b/multipathd/uxclnt.c
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@@ -16,8 +16,14 @@
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <poll.h>
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+
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+#ifdef USE_LIBEDIT
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+#include <editline/readline.h>
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+#endif
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+#ifdef USE_LIBREADLINE
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#include <readline/readline.h>
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#include <readline/history.h>
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+#endif
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#include "mpath_cmd.h"
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#include "uxsock.h"
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