bsdtar: start "fake short equivalents" enum higher (libarchive#2586)

This avoids possible conflict with command-line options such as -B.

Author: gperciva

tar/bsdtar.c

@@ -104,7 +104,7 @@ need_report(void)
 static __LA_NORETURN void		 long_help(void);
 static void		 only_mode(struct bsdtar *, const char *opt,
 			     const char *valid);
-static void		 set_mode(struct bsdtar *, char opt);
+static void		 set_mode(struct bsdtar *, int opt);
 static __LA_NORETURN void		 version(void);
 
 /* A basic set of security flags to request from libarchive. */
@@ -139,7 +139,7 @@ main(int argc, char **argv)
 {
 	struct bsdtar		*bsdtar, bsdtar_storage;
 	int			 opt, t;
-	char			 compression, compression2;
+	int			 compression, compression2;
 	const char		*compression_name, *compression2_name;
 	const char		*compress_program;
 	char			*tptr, *uptr;
@@ -938,7 +938,7 @@ main(int argc, char **argv)
 		switch (compression) {
 		case 'J': case 'j': case 'y': case 'Z': case 'z':
 			strcpy(buff, "-?");
-			buff[1] = compression;
+			buff[1] = (char)compression;
 			break;
 		default:
 			strcpy(buff, "--");
@@ -1008,7 +1008,7 @@ main(int argc, char **argv)
 }
 
 static void
-set_mode(struct bsdtar *bsdtar, char opt)
+set_mode(struct bsdtar *bsdtar, int opt)
 {
 	if (bsdtar->mode != '\0' && bsdtar->mode != opt)
 		lafe_errc(1, 0,

tar/bsdtar.h

@@ -42,7 +42,7 @@ struct bsdtar {
 	int		  uid;  /* --uid */
 	const char	 *uname; /* --uname */
 	const char	 *passphrase; /* --passphrase */
-	char		  mode; /* Program mode: 'c', 't', 'r', 'u', 'x' */
+	int		  mode; /* Program mode: 'c', 't', 'r', 'u', 'x' */
 	char		  symlink_mode; /* H or L, per BSD conventions */
 	const char	 *option_options; /* --options */
 	char		  day_first; /* show day before month in -tv output */
@@ -114,7 +114,7 @@ struct bsdtar {
 
 /* Fake short equivalents for long options that otherwise lack them. */
 enum {
-	OPTION_ACLS = 1,
+	OPTION_ACLS = 256,
 	OPTION_B64ENCODE,
 	OPTION_CHECK_LINKS,
 	OPTION_CHROOT,