win32 caveats about truncate()

p4raw-id: //depot/perl@1905

diff --git a/pod/perlport.pod b/pod/perlport.pod
index e53818e..fce35ac 100644 (file)
--- a/pod/perlport.pod
+++ b/pod/perlport.pod
@@ -1450,6 +1450,11 @@ Not implemented. (VMS)
 
 Truncation to zero-length only. (VOS)
 
+If a FILEHANDLE is supplied, it must be writable and opened in append
+mode (i.e., use C<open(FH, '>>filename')>
+or C<sysopen(FH,...,O_APPEND|O_RDWR)>.  If a filename is supplied, it
+should not be held open elsewhere. (Win32)
+
 =item umask EXPR
 
 =item umask