%RMS-W-RTB, 257 byte record too large for user's buffer

[hb--]

$ mmk/id 
%MMK-I-IDENT, this is the MMK Make Utility V5.0
-MMK-I-COPYRIGHT, Copyright (c) 2008, Matthew Madison.
    Copyright (c) 2013, Endless Software Solutions.
  See LICENSE.TXT in distribution kit for license information.
$ 

With MMK_S_DCL defined to 256 I get

$ mmk 
CC /define=(HAVE_CONFIG_H,VERSION="""21.2""")   /include=(sys$disk:[],sys$disk:[-.src],AXPA:[EMACS.EMACS212_3.LIB-SRC],AXPA:[EMACS.E
MACS212_3.SRC],AXPA:[EMACS.EMACS212_3.VMS])     /WARNINGS=(DISABLE=(UNDEFESCA,PTRMISMATCH1,PTRMISMATCH,QUESTCOMPARE,QUEST)) x
%RMS-W-RTB, 257 byte record too large for user's buffer
^Y
 Interrupt 

I changed mmk.h and it worked. But what do I know, there may be something
else going on in build_target.c ... With some trace code I see:

cmdlen: 257, MMK_S_DCL: 256, strlen(cmd): 257
i: 256, last_quote: 43, inquotes: 0
%RMS-W-RTB, 257 byte record too large for user's buffer
$

$ diff [-.newmmk]mmk.h
************
File SYS$SYSDEVICE:[HB.NEWMMK]MMK.H;2
  148   #define MMK_S_DCL       255     /* 255 is DCL command line + trailing null */
  149   #endif
******
File SYS$SYSDEVICE:[HB.NEWMMK]MMK.H;1
  148   #define MMK_S_DCL       256     /* 255 is DCL command line + trailing null */
  149   #endif
************
************
File SYS$SYSDEVICE:[HB.NEWMMK]MMK.H;2
  154   #define MMK_S_DCL       255     /* 255 is DCL command line + trailing null */
  155   #define MMK_S_MAXRSS    NAML$C_MAXRSS
******
File SYS$SYSDEVICE:[HB.NEWMMK]MMK.H;1
  154   #define MMK_S_DCL       256     /* 255 is DCL command line + trailing null */
  155   #define MMK_S_MAXRSS    NAML$C_MAXRSS
************

Number of difference sections found: 2
Number of difference records found: 2

DIFFERENCES /IGNORE=()/MERGED=1-
    SYS$SYSDEVICE:[HB.NEWMMK]MMK.H;2-
    SYS$SYSDEVICE:[HB.NEWMMK]MMK.H;1
$ mc SYS$SYSDEVICE:[HB.NEWMMK.bin-vax]mmk
CC /define=(HAVE_CONFIG_H,VERSION="""21.2""")   /include=(sys$disk:[],sys$disk:[-.src],AXPA:[EMACS.EMACS212_3.LIB-SRC],AXPA:[EMACS.E
MACS212_3.SRC],AXPA:[EMACS.EMACS212_3.VMS])     /WARNINGS=(DISABLE=(UNDEFESCA,PTRMISMATCH1,PTRMISMATCH,QUESTCOMPARE,QUEST)) x
%CLI-F-OPENIN, error opening SYS$SYSDEVICE:[HB.XMMK]X.C; as input
-RMS-E-FNF, file not found

%MMK-F-ERRUPD, error status %X1000002C occurred when updating target X
$

Yes, it is VAX.

[tesneddon]

Thanks for the report and apologies for the late response. I think this has been reported before or at least investigated. I'll dig through the history and see what I can find. Either way, it needs to be fixed!

[tesneddon]

This is the report from Hunter Goatley:

Hi, Tim.

I just fixed this error in MMK V5.0:

%RMS-W-RTB, 257 byte record too large for user's buffer

The value of MMK_S_DCL was set to 256 for VAX and older Alpha versions, but it should be set to 254. The code is building up a command with continuation characters '-' to send to the subprocess. With a value of 256, the resulting string is 257 bytes once the '-' is added, which is too big for the subprocess to handle. By setting it 254, the final string length is 255, which is the limit, and everything works as expected.

I just verified this on both VAX and Alpha V7.3.

Hunter

[hb--]

The fix doesn't work for VAX.

[tesneddon]

Thanks @hb-- . I saw the comments on comp.os.vms. I'll have a look at this.