Looking into the symbolic link issue.

http://www.pkware.com/documents/casestudies/APPNOTE.TXT

SSZipArchive.m

@@ -105,10 +105,27 @@
 			[delegate zipArchiveWillUnzipFileAtIndex:currentFileNumber totalFiles:(NSInteger)globalInfo.number_entry
 										 archivePath:path fileInfo:fileInfo];
 		}
+        
+        struct ZipExtraField
+        {
+            short headerId;
+            short dataSize;
+        };
+        
+        struct ZipExtraField extra = { 0 };
 		
 		char *filename = (char *)malloc(fileInfo.size_filename + 1);
-		unzGetCurrentFileInfo(zip, &fileInfo, filename, fileInfo.size_filename + 1, NULL, 0, NULL, 0);
+		unzGetCurrentFileInfo(zip, &fileInfo, filename, fileInfo.size_filename + 1, &extra, sizeof(struct ZipExtraField), NULL, 0);
 		filename[fileInfo.size_filename] = '\0';
+
+        NSLog(@"Filename: %s", filename);
+    
+        //extra.data = (char *)malloc(fileInfo.size_file_extra);
+        //unzGetLocalExtrafield(zip, &extra, sizeof(struct ZipExtraField));
+        
+        NSLog(@"Header ID: %ul", fileInfo.size_file_extra);
+        
+        //NSLog(@"Data: %s", extra.data);
 		
 		// Check if it contains directory
 		NSString *strPath = [NSString stringWithCString:filename encoding:NSUTF8StringEncoding];
@@ -144,6 +161,8 @@
 			ret = unzGoToNextFile(zip);
 			continue;
 		}
+        
+        NSLog(@"External file attributes: %lu", fileInfo.external_fa);
 		
 		FILE *fp = fopen((const char*)[fullPath UTF8String], "wb");
 		while (fp) {

Tests/SSZipArchive.xcodeproj/project.pbxproj

@@ -19,6 +19,8 @@
 		B215FB6D143AD6FF003AC546 /* TestArchive.zip in Resources */ = {isa = PBXBuildFile; fileRef = B215FB6C143AD6FF003AC546 /* TestArchive.zip */; };
 		B23FCC7F1558F1B70026375C /* TestPasswordArchive.zip in Resources */ = {isa = PBXBuildFile; fileRef = B23FCC7E1558F1B70026375C /* TestPasswordArchive.zip */; };
 		C5AE4E64155A12760045F3ED /* IncorrectHeaders.zip in Resources */ = {isa = PBXBuildFile; fileRef = C5AE4E63155A12760045F3ED /* IncorrectHeaders.zip */; };
+		C5AE4E6D155A8B010045F3ED /* SymbolicLink.zip in Resources */ = {isa = PBXBuildFile; fileRef = C5AE4E6C155A8B010045F3ED /* SymbolicLink.zip */; };
+		C5AE4E70155A96CF0045F3ED /* ZipTest.zip in Resources */ = {isa = PBXBuildFile; fileRef = C5AE4E6F155A96CF0045F3ED /* ZipTest.zip */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -42,6 +44,8 @@
 		B215FB6C143AD6FF003AC546 /* TestArchive.zip */ = {isa = PBXFileReference; lastKnownFileType = archive.zip; path = TestArchive.zip; sourceTree = "<group>"; };
 		B23FCC7E1558F1B70026375C /* TestPasswordArchive.zip */ = {isa = PBXFileReference; lastKnownFileType = archive.zip; path = TestPasswordArchive.zip; sourceTree = "<group>"; };
 		C5AE4E63155A12760045F3ED /* IncorrectHeaders.zip */ = {isa = PBXFileReference; lastKnownFileType = archive.zip; path = IncorrectHeaders.zip; sourceTree = "<group>"; };
+		C5AE4E6C155A8B010045F3ED /* SymbolicLink.zip */ = {isa = PBXFileReference; lastKnownFileType = archive.zip; path = SymbolicLink.zip; sourceTree = "<group>"; };
+		C5AE4E6F155A96CF0045F3ED /* ZipTest.zip */ = {isa = PBXFileReference; lastKnownFileType = archive.zip; path = ZipTest.zip; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -116,11 +120,13 @@
 		B215FB5E143AD505003AC546 /* SSZipArchiveTests */ = {
 			isa = PBXGroup;
 			children = (
+				C5AE4E6F155A96CF0045F3ED /* ZipTest.zip */,
 				B215FB61143AD514003AC546 /* SSZipArchiveTests.m */,
 				B215FB5F143AD514003AC546 /* SSZipArchiveTests-Info.plist */,
 				C5AE4E63155A12760045F3ED /* IncorrectHeaders.zip */,
 				B215FB6C143AD6FF003AC546 /* TestArchive.zip */,
 				B23FCC7E1558F1B70026375C /* TestPasswordArchive.zip */,
+				C5AE4E6C155A8B010045F3ED /* SymbolicLink.zip */,
 			);
 			name = SSZipArchiveTests;
 			sourceTree = "<group>";
@@ -180,6 +186,8 @@
 				B215FB6D143AD6FF003AC546 /* TestArchive.zip in Resources */,
 				B23FCC7F1558F1B70026375C /* TestPasswordArchive.zip in Resources */,
 				C5AE4E64155A12760045F3ED /* IncorrectHeaders.zip in Resources */,
+				C5AE4E6D155A8B010045F3ED /* SymbolicLink.zip in Resources */,
+				C5AE4E70155A96CF0045F3ED /* ZipTest.zip in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

Tests/SSZipArchiveTests.m

@@ -84,6 +84,18 @@
     STAssertTrue([actualReadmeTxtMD5 isEqualToString:intendedReadmeTxtMD5], @"Readme.txt MD5 digest should match original.");
 }
 
+- (void)testUnzippingWithSymlinkedFileInside {
+    
+    NSString* zipPath = [[NSBundle bundleForClass:[self class]] pathForResource:@"ZipTest" ofType:@"zip"];
+    NSString* outputPath = [self _cachesPath:@"SymbolicLink"];
+    
+    [SSZipArchive unzipFileAtPath:zipPath toDestination:outputPath delegate:self];
+    
+    BOOL symbolicLinkPersists = NO;
+    
+    STAssertTrue(symbolicLinkPersists, @"Symbolic links should persist from the original archive to the outputted files.");
+}
+
 
 // Commented out to avoid checking in several gig file into the repository. Simply add a file named
 // `LargeArchive.zip` to the project and uncomment out these lines to test.
@@ -99,22 +111,22 @@
 #pragma mark - SSZipArchiveDelegate
 
 - (void)zipArchiveWillUnzipArchiveAtPath:(NSString *)path zipInfo:(unz_global_info)zipInfo {
-	NSLog(@"*** zipArchiveWillUnzipArchiveAtPath: `%@` zipInfo:", path);
+	//NSLog(@"*** zipArchiveWillUnzipArchiveAtPath: `%@` zipInfo:", path);
 }
 
 
 - (void)zipArchiveDidUnzipArchiveAtPath:(NSString *)path zipInfo:(unz_global_info)zipInfo unzippedPath:(NSString *)unzippedPath {
-	NSLog(@"*** zipArchiveDidUnzipArchiveAtPath: `%@` zipInfo: unzippedPath: `%@`", path, unzippedPath);
+	//NSLog(@"*** zipArchiveDidUnzipArchiveAtPath: `%@` zipInfo: unzippedPath: `%@`", path, unzippedPath);
 }
 
 
 - (void)zipArchiveWillUnzipFileAtIndex:(NSInteger)fileIndex totalFiles:(NSInteger)totalFiles archivePath:(NSString *)archivePath fileInfo:(unz_file_info)fileInfo {
-	NSLog(@"*** zipArchiveWillUnzipFileAtIndex: `%ld` totalFiles: `%ld` archivePath: `%@` fileInfo:", fileIndex, totalFiles, archivePath);
+	//NSLog(@"*** zipArchiveWillUnzipFileAtIndex: `%ld` totalFiles: `%ld` archivePath: `%@` fileInfo:", fileIndex, totalFiles, archivePath);
 }
 
 
 - (void)zipArchiveDidUnzipFileAtIndex:(NSInteger)fileIndex totalFiles:(NSInteger)totalFiles archivePath:(NSString *)archivePath fileInfo:(unz_file_info)fileInfo {
-	NSLog(@"*** zipArchiveDidUnzipFileAtIndex: `%ld` totalFiles: `%ld` archivePath: `%@` fileInfo:", fileIndex, totalFiles, archivePath);
+	//NSLog(@"*** zipArchiveDidUnzipFileAtIndex: `%ld` totalFiles: `%ld` archivePath: `%@` fileInfo:", fileIndex, totalFiles, archivePath);
 }