From 0650a512bbf5a49031d47afac538a92e0994757a Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher <jakobunt@gmail.com>
Date: Tue, 18 May 2021 18:38:23 +0200
Subject: [PATCH] fsck: redirect go-fuse noise to syslog

---
 fsck.go              | 7 +++++++
 internal/tlog/log.go | 4 +++-
 mount.go             | 2 +-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/fsck.go b/fsck.go
index 5b32a5e..70528cf 100644
--- a/fsck.go
+++ b/fsck.go
@@ -253,6 +253,7 @@ func (ck *fsckObj) xattrs(relPath string) {
 	}
 }
 
+// entrypoint from main()
 func fsck(args *argContainer) (exitcode int) {
 	if args.reverse {
 		tlog.Fatal.Printf("Running -fsck with -reverse is not supported")
@@ -274,6 +275,12 @@ func fsck(args *argContainer) (exitcode int) {
 		watchDone:  make(chan struct{}),
 		seenInodes: make(map[uint64]struct{}),
 	}
+	if args.quiet {
+		// go-fuse throws a lot of these:
+		//   writer: Write/Writev failed, err: 2=no such file or directory. opcode: INTERRUPT
+		// This is ugly and causes failures in xfstests. Hide them away in syslog.
+		tlog.SwitchLoggerToSyslog()
+	}
 	// Mount
 	srv := initGoFuse(pfs, args)
 	// Handle SIGINT & SIGTERM
diff --git a/internal/tlog/log.go b/internal/tlog/log.go
index 0eee704..6d32a6b 100644
--- a/internal/tlog/log.go
+++ b/internal/tlog/log.go
@@ -136,6 +136,7 @@ func init() {
 }
 
 // SwitchToSyslog redirects the output of this logger to syslog.
+// p = facility | severity
 func (l *toggledLogger) SwitchToSyslog(p syslog.Priority) {
 	w, err := syslog.New(p, ProgramName)
 	if err != nil {
@@ -150,7 +151,8 @@ func (l *toggledLogger) SwitchToSyslog(p syslog.Priority) {
 
 // SwitchLoggerToSyslog redirects the default log.Logger that the go-fuse lib uses
 // to syslog.
-func SwitchLoggerToSyslog(p syslog.Priority) {
+func SwitchLoggerToSyslog() {
+	p := syslog.LOG_USER | syslog.LOG_WARNING
 	w, err := syslog.New(p, ProgramName)
 	if err != nil {
 		Warn.Printf("SwitchLoggerToSyslog: %v", err)
diff --git a/mount.go b/mount.go
index 9409471..f992f94 100644
--- a/mount.go
+++ b/mount.go
@@ -143,7 +143,7 @@ func doMount(args *argContainer) {
 			tlog.Debug.SwitchToSyslog(syslog.LOG_USER | syslog.LOG_DEBUG)
 			tlog.Warn.SwitchToSyslog(syslog.LOG_USER | syslog.LOG_WARNING)
 			tlog.Fatal.SwitchToSyslog(syslog.LOG_USER | syslog.LOG_CRIT)
-			tlog.SwitchLoggerToSyslog(syslog.LOG_USER | syslog.LOG_WARNING)
+			tlog.SwitchLoggerToSyslog()
 			// Daemons should redirect stdin, stdout and stderr
 			redirectStdFds()
 		}