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From: Stefano Brivio <sbrivio@redhat.com>
To: passt-dev@passt.top
Cc: Yalan Zhang <yalzhang@redhat.com>,
	David Gibson <david@gibson.dropbear.id.au>
Subject: [PATCH v4 8/8] conf, passt: Don't call __openlog() if a log file is used
Date: Thu, 20 Jun 2024 06:08:00 +0200	[thread overview]
Message-ID: <20240620040800.3065684-9-sbrivio@redhat.com> (raw)
In-Reply-To: <20240620040800.3065684-1-sbrivio@redhat.com>

If a log file is configured, we would otherwise open a connection to
the system logger (if any), print any message that we might have
before we initialise the log file, and then keep that connection
around for no particular reason.

Call __openlog() as an alternative to the log file setup, instead.

This way, we might skip printing some messages during the
initialisation phase, but they're probably not really valuable to
have in a system log, and we're going to print them to standard
error anyway.

Suggested-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
---
 conf.c  | 9 +++++----
 passt.c | 4 ----
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/conf.c b/conf.c
index 09bf6dd..5a4f559 100644
--- a/conf.c
+++ b/conf.c
@@ -1220,6 +1220,7 @@ void conf(struct ctx *c, int argc, char **argv)
 		{"no-copy-addrs", no_argument,		NULL,		19 },
 		{ 0 },
 	};
+	const char *logname = (c->mode == MODE_PASTA) ? "pasta" : "passt";
 	char userns[PATH_MAX] = { 0 }, netns[PATH_MAX] = { 0 };
 	bool copy_addrs_opt = false, copy_routes_opt = false;
 	struct in6_addr *dns6 = c->ip6.dns, dns6_tmp;
@@ -1680,10 +1681,10 @@ void conf(struct ctx *c, int argc, char **argv)
 
 	conf_ugid(runas, &uid, &gid);
 
-	if (logfile) {
-		logfile_init(c->mode == MODE_PASTA ? "pasta" : "passt",
-			     logfile, logsize);
-	}
+	if (logfile)
+		logfile_init(logname, logfile, logsize);
+	else
+		__openlog(logname, 0, LOG_DAEMON);
 
 	if (c->debug)
 		__setlogmask(LOG_UPTO(LOG_DEBUG));
diff --git a/passt.c b/passt.c
index fde15f9..26ee21b 100644
--- a/passt.c
+++ b/passt.c
@@ -224,8 +224,6 @@ int main(int argc, char **argv)
 	strncpy(argv0, argv[0], PATH_MAX - 1);
 	name = basename(argv0);
 	if (strstr(name, "pasta")) {
-		__openlog("pasta", 0, LOG_DAEMON);
-
 		sa.sa_handler = pasta_child_handler;
 		if (sigaction(SIGCHLD, &sa, NULL))
 			die_perror("Couldn't install signal handlers");
@@ -235,8 +233,6 @@ int main(int argc, char **argv)
 
 		c.mode = MODE_PASTA;
 	} else if (strstr(name, "passt")) {
-		__openlog("passt", 0, LOG_DAEMON);
-
 		c.mode = MODE_PASST;
 	} else {
 		exit(EXIT_FAILURE);
-- 
@@ -224,8 +224,6 @@ int main(int argc, char **argv)
 	strncpy(argv0, argv[0], PATH_MAX - 1);
 	name = basename(argv0);
 	if (strstr(name, "pasta")) {
-		__openlog("pasta", 0, LOG_DAEMON);
-
 		sa.sa_handler = pasta_child_handler;
 		if (sigaction(SIGCHLD, &sa, NULL))
 			die_perror("Couldn't install signal handlers");
@@ -235,8 +233,6 @@ int main(int argc, char **argv)
 
 		c.mode = MODE_PASTA;
 	} else if (strstr(name, "passt")) {
-		__openlog("passt", 0, LOG_DAEMON);
-
 		c.mode = MODE_PASST;
 	} else {
 		exit(EXIT_FAILURE);
-- 
2.43.0


      parent reply	other threads:[~2024-06-20  4:08 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-06-20  4:07 [PATCH v4 0/8] Fixes for early logging/prints and related cleanups Stefano Brivio
2024-06-20  4:07 ` [PATCH v4 1/8] conf, passt: Don't try to log to stderr after we close it Stefano Brivio
2024-06-20  4:07 ` [PATCH v4 2/8] conf, passt: Make --stderr do nothing, and deprecate it Stefano Brivio
2024-06-20  4:07 ` [PATCH v4 3/8] conf, log: Instead of abusing log levels, add log_conf_parsed flag Stefano Brivio
2024-06-20  4:07 ` [PATCH v4 4/8] log, passt: Always print to stderr before initialisation is complete Stefano Brivio
2024-06-20  4:34   ` David Gibson
2024-06-20  4:07 ` [PATCH v4 5/8] log: Add _perror() logging function variants Stefano Brivio
2024-06-20  4:07 ` [PATCH v4 6/8] treewide: Replace perror() calls with calls to logging functions Stefano Brivio
2024-06-20  4:07 ` [PATCH v4 7/8] treewide: Replace strerror() calls Stefano Brivio
2024-06-20  4:08 ` Stefano Brivio [this message]

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