Fix build failure on Windows.

 - Visual Studio does not provide unistd.h
 - Visual Studio does not provide getopt
 - Increase portability

1 files changed, 16 insertions, 0 deletions

diff --git a/cat/bsdcat.h b/cat/bsdcat.h
index 227e01ac..ca603d3d 100644
--- a/cat/bsdcat.h
+++ b/cat/bsdcat.h
@@ -34,6 +34,22 @@
 #include <archive.h>
 #include <archive_entry.h>
 
+struct bsdcat {
+	/* Option parser state */
+	int		  getopt_state;
+	char		 *getopt_word;
+
+	/* Miscellaneous state information */
+	int		  argc;
+	char		**argv;
+	const char	 *argument;
+};
+
+enum {
+	OPTION_VERSION
+};
+
+int bsdcat_getopt(struct bsdcat *);
 void usage(FILE *stream, int eval);
 void bsdcat_next(void);
 void bsdcat_print_error(void);