From a0aff5b1462edacd364036c465fbbf32fc00f2c1 Mon Sep 17 00:00:00 2001
From: Vitaliy Filippov <vitalif@yourcmc.ru>
Date: Sun, 19 Mar 2017 12:48:01 +0300
Subject: [PATCH] Fix #136 - Skip links, sockets, fifos and etc

---
 libgrive/src/base/Resource.cc | 28 ++++++++++++++++++----------
 libgrive/src/util/OS.cc       | 12 ++++++------
 libgrive/src/util/OS.hh       |  6 ++++--
 3 files changed, 28 insertions(+), 18 deletions(-)

diff --git a/libgrive/src/base/Resource.cc b/libgrive/src/base/Resource.cc
index 23ce335..72c8052 100644
--- a/libgrive/src/base/Resource.cc
+++ b/libgrive/src/base/Resource.cc
@@ -262,10 +262,10 @@ void Resource::FromLocal( Val& state )
 	if ( !IsRoot() )
 	{
 		fs::path path = Path() ;
-		bool is_dir;
+		FileType ft ;
 		try
 		{
-			os::Stat( path, &m_ctime, (off64_t*)&m_size, &is_dir ) ;
+			os::Stat( path, &m_ctime, (off64_t*)&m_size, &ft ) ;
 		}
 		catch ( os::Error &e )
 		{
@@ -276,22 +276,30 @@ void Resource::FromLocal( Val& state )
 			m_kind = "bad";
 			return;
 		}
+		if ( ft == FT_UNKNOWN )
+		{
+			// Skip sockets/FIFOs/etc
+			Log( "File %1% is not a regular file or directory; skipping file", path.string(), log::warning );
+			m_state = sync;
+			m_kind = "bad";
+			return;
+		}
 
 		m_name = path.filename().string() ;
-		m_kind = is_dir ? "folder" : "file";
+		m_kind = ft == FT_DIR ? "folder" : "file";
 		m_local_exists = true;
 
 		bool is_changed;
 		if ( state.Has( "ctime" ) && (u64_t) m_ctime.Sec() <= state["ctime"].U64() &&
-			( is_dir || state.Has( "md5" ) ) )
+			( ft == FT_DIR || state.Has( "md5" ) ) )
 		{
-			if ( !is_dir )
+			if ( ft != FT_DIR )
 				m_md5 = state["md5"];
 			is_changed = false;
 		}
 		else
 		{
-			if ( !is_dir )
+			if ( ft != FT_DIR )
 			{
 				// File is changed locally. TODO: Detect conflicts
 				is_changed = ( state.Has( "size" ) && m_size != state["size"].U64() ) ||
@@ -703,13 +711,13 @@ void Resource::SetIndex( bool re_stat )
 	assert( m_parent && m_parent->m_json != NULL );
 	if ( !m_json )
 		m_json = &((*m_parent->m_json)["tree"]).Item( Name() );
-	bool is_dir;
+	FileType ft;
 	if ( re_stat )
-		os::Stat( Path(), &m_ctime, NULL, &is_dir );
+		os::Stat( Path(), &m_ctime, NULL, &ft );
 	else
-		is_dir = IsFolder();
+		ft = IsFolder() ? FT_DIR : FT_FILE;
 	m_json->Set( "ctime", Val( m_ctime.Sec() ) );
-	if ( !is_dir )
+	if ( ft != FT_DIR )
 	{
 		m_json->Set( "md5", Val( m_md5 ) );
 		m_json->Set( "size", Val( m_size ) );
diff --git a/libgrive/src/util/OS.cc b/libgrive/src/util/OS.cc
index 9095e73..e8b468f 100644
--- a/libgrive/src/util/OS.cc
+++ b/libgrive/src/util/OS.cc
@@ -39,12 +39,12 @@
 
 namespace gr { namespace os {
 
-void Stat( const fs::path& filename, DateTime *t, off_t *size, bool *is_dir )
+void Stat( const fs::path& filename, DateTime *t, off_t *size, FileType *ft )
 {
-	Stat( filename.string(), t, size, is_dir ) ;
+	Stat( filename.string(), t, size, ft ) ;
 }
 
-void Stat( const std::string& filename, DateTime *t, off64_t *size, bool *is_dir )
+void Stat( const std::string& filename, DateTime *t, off64_t *size, FileType *ft )
 {
 	struct stat s = {} ;
 	if ( ::stat( filename.c_str(), &s ) != 0 )
@@ -57,7 +57,7 @@ void Stat( const std::string& filename, DateTime *t, off64_t *size, bool *is_dir
 		) ;
 	}
 	
-	if (t)
+	if ( t )
 	{
 #if defined __APPLE__ && defined __DARWIN_64_BIT_INO_T
 		*t = DateTime( s.st_ctimespec.tv_sec, s.st_ctimespec.tv_nsec ) ;
@@ -67,8 +67,8 @@ void Stat( const std::string& filename, DateTime *t, off64_t *size, bool *is_dir
 	}
 	if ( size )
 		*size = s.st_size;
-	if ( is_dir )
-		*is_dir = S_ISDIR( s.st_mode ) ? true : false;
+	if ( ft )
+		*ft = S_ISDIR( s.st_mode ) ? FT_DIR : ( S_ISREG( s.st_mode ) ? FT_FILE : FT_UNKNOWN ) ;
 }
 
 void SetFileTime( const fs::path& filename, const DateTime& t )
diff --git a/libgrive/src/util/OS.hh b/libgrive/src/util/OS.hh
index 4349783..bd28e30 100644
--- a/libgrive/src/util/OS.hh
+++ b/libgrive/src/util/OS.hh
@@ -29,12 +29,14 @@ namespace gr {
 class DateTime ;
 class Path ;
 
+enum FileType { FT_FILE = 1, FT_DIR = 2, FT_UNKNOWN = 3 } ;
+
 namespace os
 {
 	struct Error : virtual Exception {} ;
 	
-	void Stat( const std::string& filename, DateTime *t, off64_t *size, bool *is_dir ) ;
-	void Stat( const fs::path& filename, DateTime *t, off64_t *size, bool *is_dir ) ;
+	void Stat( const std::string& filename, DateTime *t, off64_t *size, FileType *ft ) ;
+	void Stat( const fs::path& filename, DateTime *t, off64_t *size, FileType *ft ) ;
 	
 	void SetFileTime( const std::string& filename, const DateTime& t ) ;
 	void SetFileTime( const fs::path& filename, const DateTime& t ) ;