[PATCHv2 1/3] Share Dup Daemon Function *SetupLogging

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One of the BiteSizedTasks

Introduce src/util/virdaemon.c/h files

Introduce a new function virDaemonSetupLogging (src/util/virdaemon.c)
for shared code in
virLockDaemonSetupLogging (src/locking/lock_daemon.c)
virLogDaemonSetupLogging (src/logging/log_daemon.c)
daemonSetupLogging (src/remote/remote_daemon.c)

Introduce virDaemonLogConfig struct for config->log_* variables in
virLockDaemonConfig/virLogDaemonConfig/daemonConfig struct

Signed-off-by: Lan Bai <lbai@xxxxxxxx>
---
 src/libvirt_private.syms   |  2 +
 src/locking/lock_daemon.c  | 58 ++---------------------------
 src/logging/log_daemon.c   | 50 ++-----------------------
 src/remote/remote_daemon.c | 57 ++---------------------------
 src/util/Makefile.inc.am   |  4 +-
 src/util/virdaemon.c       | 75 ++++++++++++++++++++++++++++++++++++++
 src/util/virdaemon.h       | 35 ++++++++++++++++++
 7 files changed, 126 insertions(+), 155 deletions(-)
 create mode 100644 src/util/virdaemon.c
 create mode 100644 src/util/virdaemon.h

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index de0c7a3133..50cbd6d7af 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1906,6 +1906,8 @@ virCryptoHashBuf;
 virCryptoHashString;
 virCryptoHaveCipher;
 
+# util/virdaemon.h
+virDaemonSetupLogging;
 
 # util/virdbus.h
 virDBusCallMethod;
diff --git a/src/locking/lock_daemon.c b/src/locking/lock_daemon.c
index 5e5a0c1089..5ba851cb55 100644
--- a/src/locking/lock_daemon.c
+++ b/src/locking/lock_daemon.c
@@ -46,6 +46,7 @@
 #include "virstring.h"
 #include "virgettext.h"
 #include "virenum.h"
+#include "virdaemon.h"
 
 #include "locking/lock_daemon_dispatch.h"
 #include "locking/lock_protocol.h"
@@ -477,59 +478,6 @@ virLockDaemonErrorHandler(void *opaque G_GNUC_UNUSED,
 }
 
 
-/*
- * Set up the logging environment
- * By default if daemonized all errors go to the logfile libvirtd.log,
- * but if verbose or error debugging is asked for then also output
- * informational and debug messages. Default size if 64 kB.
- */
-static int
-virLockDaemonSetupLogging(virLockDaemonConfigPtr config,
-                          bool privileged,
-                          bool verbose,
-                          bool godaemon)
-{
-    virLogReset();
-
-    /*
-     * Libvirtd's order of precedence is:
-     * cmdline > environment > config
-     *
-     * Given the precedence, we must process the variables in the opposite
-     * order, each one overriding the previous.
-     */
-    if (config->log_level != 0)
-        virLogSetDefaultPriority(config->log_level);
-
-    /* In case the config is empty, both filters and outputs will become empty,
-     * however we can't start with empty outputs, thus we'll need to define and
-     * setup a default one.
-     */
-    ignore_value(virLogSetFilters(config->log_filters));
-    ignore_value(virLogSetOutputs(config->log_outputs));
-
-    /* If there are some environment variables defined, use those instead */
-    virLogSetFromEnv();
-
-    /*
-     * Command line override for --verbose
-     */
-    if ((verbose) && (virLogGetDefaultPriority() > VIR_LOG_INFO))
-        virLogSetDefaultPriority(VIR_LOG_INFO);
-
-    /* Define the default output. This is only applied if there was no setting
-     * from either the config or the environment.
-     */
-    virLogSetDefaultOutput("virtlockd", godaemon, privileged);
-
-    if (virLogGetNbOutputs() == 0)
-        virLogSetOutputs(virLogGetDefaultOutput());
-
-    return 0;
-}
-
-
-
 /* Display version information. */
 static void
 virLockDaemonVersion(const char *argv0)
@@ -1186,7 +1134,9 @@ int main(int argc, char **argv) {
     }
     VIR_FREE(remote_config_file);
 
-    if (virLockDaemonSetupLogging(config, privileged, verbose, godaemon) < 0) {
+    if (virDaemonSetupLogging((virDaemonLogConfigPtr)(&(config->log_level)),
+                              "virtlockd", privileged,
+                              verbose, godaemon)< 0) {
         VIR_ERROR(_("Can't initialize logging"));
         exit(EXIT_FAILURE);
     }
diff --git a/src/logging/log_daemon.c b/src/logging/log_daemon.c
index 772bbb805b..9f962300ed 100644
--- a/src/logging/log_daemon.c
+++ b/src/logging/log_daemon.c
@@ -45,6 +45,7 @@
 #include "virstring.h"
 #include "virgettext.h"
 #include "virenum.h"
+#include "virdaemon.h"
 
 #include "log_daemon_dispatch.h"
 #include "log_protocol.h"
@@ -419,51 +420,6 @@ virLogDaemonErrorHandler(void *opaque G_GNUC_UNUSED,
 }
 
 
-static void
-virLogDaemonSetupLogging(virLogDaemonConfigPtr config,
-                         bool privileged,
-                         bool verbose,
-                         bool godaemon)
-{
-    virLogReset();
-
-    /*
-     * Libvirtd's order of precedence is:
-     * cmdline > environment > config
-     *
-     * Given the precedence, we must process the variables in the opposite
-     * order, each one overriding the previous.
-     */
-    if (config->log_level != 0)
-        virLogSetDefaultPriority(config->log_level);
-
-    /* In case the config is empty, both filters and outputs will become empty,
-     * however we can't start with empty outputs, thus we'll need to define and
-     * setup a default one.
-     */
-    ignore_value(virLogSetFilters(config->log_filters));
-    ignore_value(virLogSetOutputs(config->log_outputs));
-
-    /* If there are some environment variables defined, use those instead */
-    virLogSetFromEnv();
-
-    /*
-     * Command line override for --verbose
-     */
-    if ((verbose) && (virLogGetDefaultPriority() > VIR_LOG_INFO))
-        virLogSetDefaultPriority(VIR_LOG_INFO);
-
-    /* Define the default output. This is only applied if there was no setting
-     * from either the config or the environment.
-     */
-    virLogSetDefaultOutput("virtlogd", godaemon, privileged);
-
-    if (virLogGetNbOutputs() == 0)
-        virLogSetOutputs(virLogGetDefaultOutput());
-}
-
-
-
 /* Display version information. */
 static void
 virLogDaemonVersion(const char *argv0)
@@ -957,8 +913,8 @@ int main(int argc, char **argv) {
         exit(EXIT_FAILURE);
     }
 
-    virLogDaemonSetupLogging(config, privileged, verbose, godaemon);
-
+    virDaemonSetupLogging((virDaemonLogConfigPtr)(&(config->log_level)),
+                           "virtlogd", privileged, verbose, godaemon);
     if (!pid_file &&
         virPidFileConstructPath(privileged,
                                 RUNSTATEDIR,
diff --git a/src/remote/remote_daemon.c b/src/remote/remote_daemon.c
index 7082460bae..4bbdc255d0 100644
--- a/src/remote/remote_daemon.c
+++ b/src/remote/remote_daemon.c
@@ -57,6 +57,7 @@
 #include "util/virnetdevopenvswitch.h"
 #include "virsystemd.h"
 #include "virhostuptime.h"
+#include "virdaemon.h"
 
 #include "driver.h"
 
@@ -606,58 +607,6 @@ daemonSetupNetDevOpenvswitch(struct daemonConfig *config)
 }
 
 
-/*
- * Set up the logging environment
- * By default if daemonized all errors go to journald/a logfile
- * but if verbose or error debugging is asked for then also output
- * informational and debug messages. Default size if 64 kB.
- */
-static int
-daemonSetupLogging(struct daemonConfig *config,
-                   bool privileged,
-                   bool verbose,
-                   bool godaemon)
-{
-    virLogReset();
-
-    /*
-     * Logging setup order of precedence is:
-     * cmdline > environment > config
-     *
-     * Given the precedence, we must process the variables in the opposite
-     * order, each one overriding the previous.
-     */
-    if (config->log_level != 0)
-        virLogSetDefaultPriority(config->log_level);
-
-    /* In case the config is empty, both filters and outputs will become empty,
-     * however we can't start with empty outputs, thus we'll need to define and
-     * setup a default one.
-     */
-    ignore_value(virLogSetFilters(config->log_filters));
-    ignore_value(virLogSetOutputs(config->log_outputs));
-
-    /* If there are some environment variables defined, use those instead */
-    virLogSetFromEnv();
-
-    /*
-     * Command line override for --verbose
-     */
-    if ((verbose) && (virLogGetDefaultPriority() > VIR_LOG_INFO))
-        virLogSetDefaultPriority(VIR_LOG_INFO);
-
-    /* Define the default output. This is only applied if there was no setting
-     * from either the config or the environment.
-     */
-    virLogSetDefaultOutput(DAEMON_NAME, godaemon, privileged);
-
-    if (virLogGetNbOutputs() == 0)
-        virLogSetOutputs(virLogGetDefaultOutput());
-
-    return 0;
-}
-
-
 static int
 daemonSetupAccessManager(struct daemonConfig *config)
 {
@@ -1147,7 +1096,9 @@ int main(int argc, char **argv) {
         exit(EXIT_FAILURE);
     }
 
-    if (daemonSetupLogging(config, privileged, verbose, godaemon) < 0) {
+    if (virDaemonSetupLogging((virDaemonLogConfigPtr)(&(config->log_level)),
+                              DAEMON_NAME, privileged,
+                              verbose, godaemon) < 0) {
         VIR_ERROR(_("Can't initialize logging"));
         exit(EXIT_FAILURE);
     }
diff --git a/src/util/Makefile.inc.am b/src/util/Makefile.inc.am
index ddb3b43c5f..cf64220b63 100644
--- a/src/util/Makefile.inc.am
+++ b/src/util/Makefile.inc.am
@@ -42,7 +42,9 @@ UTIL_SOURCES = \
 	util/virconf.h \
 	util/vircrypto.c \
 	util/vircrypto.h \
-	util/virdbus.c \
+	util/virdaemon.c \
+	util/virdaemon.h \
+        util/virdbus.c \
 	util/virdbus.h \
 	util/virdbuspriv.h \
 	util/virdevmapper.c \
diff --git a/src/util/virdaemon.c b/src/util/virdaemon.c
new file mode 100644
index 0000000000..a2ef48b78b
--- /dev/null
+++ b/src/util/virdaemon.c
@@ -0,0 +1,75 @@
+/*
+ * virdaemon.c: remote/logging/lock management daemon common code
+ *
+ * Copyright (C) 2006-2020 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library;  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include "virdaemon.h"
+#include "virlog.h"
+
+
+/*
+ * Set up the logging environment
+ * By default if daemonized all errors go to journald/a logfile
+ * but if verbose or error debugging is asked for then also output
+ * informational and debug messages. Default size if 64 kB.
+ */
+int
+virDaemonSetupLogging(virDaemonLogConfigPtr config,
+                      const char *output_fname,
+                      bool privileged, bool verbose, bool godaemon)
+{
+    virLogReset();
+
+    /*
+     * Libvirtd's order of precedence is:
+     * cmdline > environment > config
+     *
+     * Given the precedence, we must process the variables in the opposite
+     * order, each one overriding the previous.
+     */
+    if (config->log_level != 0)
+        virLogSetDefaultPriority(config->log_level);
+
+    /* In case the config is empty, both filters and outputs will become empty,
+     * however we can't start with empty outputs, thus we'll need to define and
+     * setup a default one.
+     */
+    ignore_value(virLogSetFilters(config->log_filters));
+    ignore_value(virLogSetOutputs(config->log_outputs));
+
+    /* If there are some environment variables defined, use those instead */
+    virLogSetFromEnv();
+
+    /*
+     * Command line override for --verbose
+     */
+    if ((verbose) && (virLogGetDefaultPriority() > VIR_LOG_INFO))
+        virLogSetDefaultPriority(VIR_LOG_INFO);
+
+    /* Define the default output. This is only applied if there was no setting
+     * from either the config or the environment.
+     */
+    virLogSetDefaultOutput(output_fname, godaemon, privileged);
+
+    if (virLogGetNbOutputs() == 0)
+        virLogSetOutputs(virLogGetDefaultOutput());
+
+    return 0;
+}
diff --git a/src/util/virdaemon.h b/src/util/virdaemon.h
new file mode 100644
index 0000000000..60b4119f08
--- /dev/null
+++ b/src/util/virdaemon.h
@@ -0,0 +1,35 @@
+/*
+ * virdaemon.h: remote/logging/lock management daemon common code
+ *
+ * Copyright (C) 2006-2020 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library;  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include "internal.h"
+
+typedef struct _virDaemonLogConfig virDaemonLogConfig;
+typedef virDaemonLogConfig *virDaemonLogConfigPtr;
+
+struct _virDaemonLogConfig {
+    unsigned int log_level;
+    char *log_filters;
+    char *log_outputs;
+};
+
+int virDaemonSetupLogging(virDaemonLogConfigPtr config,
+                          const char *output_fname,
+                          bool privileged, bool verbose, bool godaemon);
-- 
2.17.1






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