Added debug/dry run mode

This mode does not generate an appledouble file and instead prints out:
 - The input file (both local and absolute paths)
 - The output file
 - The copyfile flags that would have been used (printed in hexadecimal)
 - The the actual flags above that were valid (printed in hexadecimal)

src/appledouble.c

@@ -77,10 +77,26 @@ int MakeAppleDouble(ExecInfo *Info) {
 	}
 
 	//If copyfile outputs a value other than 0, it has failed
-	int ResultCode = copyfile(Info->Config.FPath, OutputPath, NULL, Info->Config.CFFlags);
-	if (ResultCode) {
-		fprintf(stderr, "Error: copyfile failed with error code %d!\nInput file: \"%s\"\nOutput file: \"%s\"\n", ResultCode, Info->Config.FPath, OutputPath);
-		fprintf(stderr, "Please refer to copyfile's error codes through 'man 3 copyfile' for more information\n");
+	if (!Info->Config.Opt_D) {
+		int ResultCode = copyfile(Info->Config.FPath, OutputPath, NULL, Info->Config.CFFlags);
+		if (ResultCode) {
+			fprintf(stderr, "Error: copyfile failed with error code %d!\nInput file: \"%s\"\nOutput file: \"%s\"\n", ResultCode, Info->Config.FPath, OutputPath);
+			fprintf(stderr, "Please refer to copyfile's error codes through 'man 3 copyfile' for more information\n");
+		}
+		return ResultCode;
+	//If debug mode is enabled, don't run copyfile and instead print debug info
+	} else {
+		copyfile_flags_t CopiedFlags = copyfile(Info->Config.FPath, OutputPath, NULL, Info->Config.CFFlags);
+		Info->Config.CFFlags -= COPYFILE_CHECK;
+		copyfile_flags_t FixedCopyFlags[] = {Info->Config.CFFlags, CopiedFlags};
+		printf("Debug/dry run mode active:\n"
+			"        Input file (local path): \"%s\"\n"
+			"        Input file: \"%s\"\n"
+			"        Skipped output file: \"%s\"\n"
+			"        Input flags: %xx\n"
+			"        COPYFILE_CHECK flags: %xx"
+		"\n", OldFPath, Info->Config.FPath, OutputPath, FixedCopyFlags[0], FixedCopyFlags[1]);
+
+		return 0;
 	}
-	return ResultCode;
 }

src/args.c

@@ -83,6 +83,11 @@ int ParseArgs(ExecInfo *Info, const int argc, const char *argv[]) {
 						case 'R':
 							Info->Config.Opt_R = 1;
 							break;
+						//Debug/dry run mode
+						case 'd':
+							Info->Config.CFFlags += COPYFILE_CHECK;
+							Info->Config.Opt_D = 1;
+							break;
 						//Copy POSIX and ACL information in addition to extended attributes
 						case 'a':
 							Info->Config.CFFlags += COPYFILE_SECURITY;

src/customDefs.h

@@ -15,6 +15,7 @@ typedef struct ExecConfig {
 	copyfile_flags_t CFFlags;
 	int Opt_R;
 	int Opt_rr;
+	int Opt_D;
 	char FPath[3334];
 } ExecConfig;
 

src/info.c

@@ -23,12 +23,13 @@ void DisplayInfo(ExecInfo *Info, const int DisplayMode) {
 		"        copyfile: man 3 copyfile\n"
 		"\n"
 		"Usage:\n"
-		"        appledouble [-frRavhA] file\n" 
+		"        appledouble [-frRdavhA] file\n" 
 		"\n"
 		"Options:\n" 
 		"        -f    Overwrite any existing appledouble files\n"//COPYFILE_UNLINK + !COPYFILE_EXCL
 		"        -r    Follow symlinks\n"//!COPYFILE_NOFOLLOW
 		"        -R    Attempt to convert existing appledouble files\n"//!COPYFILE_NOFOLLOW
+		"        -d    Enables debug/dry run mode\n"//COPYFILE_CHECK
 		"        -a    Copy POSIX and ACL information in addition to extended attributes\n"//COPYFILE_SECURITY
 		"        -v    Display the version number\n"
 		"        -h    Display this help page\n"

src/main.c

@@ -19,7 +19,7 @@
 int main(int argc, char *argv[]) {
 	ExecInfo Info = {
 		//Version Name
-		"1.1.1"
+		"1.2.0"
 	};
 	Info.Config.CFFlags = COPYFILE_XATTR | COPYFILE_PACK | COPYFILE_EXCL | COPYFILE_NOFOLLOW;
 	Info.Config.Opt_R = 0;