From cd752e7cafccf6a829d47cb2eff20d506703c32e Mon Sep 17 00:00:00 2001
From: Christos Zoulas <christos@zoulas.com>
Date: Wed, 1 Aug 2018 09:53:18 +0000
Subject: [PATCH] try to use the "right" off_t_max

---
 src/apprentice.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/apprentice.c b/src/apprentice.c
index ea8d0b22..36b31708 100644
--- a/src/apprentice.c
+++ b/src/apprentice.c
@@ -32,7 +32,7 @@
 #include "file.h"
 
 #ifndef	lint
-FILE_RCSID("@(#)$File: apprentice.c,v 1.272 2018/06/22 20:39:50 christos Exp $")
+FILE_RCSID("@(#)$File: apprentice.c,v 1.273 2018/08/01 09:53:18 christos Exp $")
 #endif	/* lint */
 
 #include "magic.h"
@@ -55,11 +55,6 @@ FILE_RCSID("@(#)$File: apprentice.c,v 1.272 2018/06/22 20:39:50 christos Exp $")
 #include <limits.h>
 #endif
 
-#ifndef SSIZE_MAX
-#define MAXMAGIC_SIZE        ((ssize_t)0x7fffffff)
-#else
-#define MAXMAGIC_SIZE        SSIZE_MAX
-#endif
 
 #define	EATAB {while (isascii((unsigned char) *l) && \
 		      isspace((unsigned char) *l))  ++l;}
@@ -300,6 +295,15 @@ get_type(const struct type_tbl_s *tbl, const char *l, const char **t)
 	return p->type;
 }
 
+private off_t
+maxoff_t(void) {
+	if (sizeof(off_t) == sizeof(int))
+		return CAST(off_t, INT_MAX);
+	if (sizeof(off_t) == sizeof(long))
+		return CAST(off_t, LONG_MAX);
+	return 0x7fffffff;
+}
+
 private int
 get_standard_integer_type(const char *l, const char **t)
 {
@@ -3052,7 +3056,7 @@ apprentice_map(struct magic_set *ms, const char *fn)
 		file_error(ms, errno, "cannot stat `%s'", dbname);
 		goto error;
 	}
-	if (st.st_size < 8 || st.st_size > MAXMAGIC_SIZE) {
+	if (st.st_size < 8 || st.st_size > maxoff_t()) {
 		file_error(ms, 0, "file `%s' is too %s", dbname,
 		    st.st_size < 8 ? "small" : "large");
 		goto error;
-- 
2.49.0