From: Jarkko Hietaniemi <jhi@iki.fi>
Date: Fri, 11 Oct 2002 02:48:26 +0000 (+0300)
Subject: definition of MAXPATHLEN
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=09448d78b3a7197d822f3a4cddd3020b529656e9;p=p5sagit%2Fp5-mst-13.2.git

definition of MAXPATHLEN
Subject: [PATCH] standard lawyerism
Message-ID: <20021010234825.GM292305@lyta.hut.fi>

p4raw-id: //depot/perl@18025
---

diff --git a/perl.h b/perl.h
index 5391919..4f71313 100644
--- a/perl.h
+++ b/perl.h
@@ -1972,18 +1972,21 @@ typedef struct clone_params CLONE_PARAMS;
 #  ifdef PATH_MAX
 #    ifdef _POSIX_PATH_MAX
 #       if PATH_MAX > _POSIX_PATH_MAX
-/* MAXPATHLEN is supposed to include the final null character,
- * as opposed to PATH_MAX and _POSIX_PATH_MAX. */
-#         define MAXPATHLEN (PATH_MAX+1)
+/* POSIX 1990 (and pre) was ambiguous about whether PATH_MAX
+ * included the null byte or not.  Later amendments of POSIX,
+ * XPG4, the Austin Group, and the Single UNIX Specification
+ * all explicitly include the null byte in the PATH_MAX.
+ * Ditto for _POSIX_PATH_MAX. */
+#         define MAXPATHLEN PATH_MAX
 #       else
-#         define MAXPATHLEN (_POSIX_PATH_MAX+1)
+#         define MAXPATHLEN _POSIX_PATH_MAX
 #       endif
 #    else
 #      define MAXPATHLEN (PATH_MAX+1)
 #    endif
 #  else
 #    ifdef _POSIX_PATH_MAX
-#       define MAXPATHLEN (_POSIX_PATH_MAX+1)
+#       define MAXPATHLEN _POSIX_PATH_MAX
 #    else
 #       define MAXPATHLEN 1024	/* Err on the large side. */
 #    endif