On Mon, 2002-08-12 at 21:07, Peter Eisentraut wrote:
> This is not the only issue. You really need to check all uses of off_t
> (for example printf("%ld", off_t) will crash) and all places where off_t
> should have been used in the first place. Furthermore you might need to
> replace ftell() and fseek() by ftello() and fseeko(), especially if you
> want pg_dump to support large archives.
Searching for fseek, ftell and off_t yields only 12 files in the whole
source tree, so fortunately the impact is not enormous. As expected,
pg_dump is the main program involved.
There seem to be several places in the pg_dump code where int is used
instead of long int to receive the output of ftell(). I presume these
ought to be cleaned up as well.
Looking at how to deal with this, is the following going to be
portable?:
in pg_dump/Makefile:
CFLAGS += -D_LARGEFILE_SOURCE -D_OFFSET_BITS=64
in pg_dump.h:
#ifdef _LARGEFILE_SOURCE
#define FSEEK fseeko
#define FTELL ftello
#define OFF_T_FORMAT %Ld
typedef off_t OFF_T;
#else
#define FSEEK fseek
#define FTELL ftell
#define OFF_T_FORMAT %ld
typedef long int OFF_T;
#endif
In pg_dump/*.c:
change relevant occurrences of fseek and ftell to FSEEK and
FTELL
change all file offset parameters used or returned by fseek and
ftell to OFF_T (usually from int)
construct printf formats with OFF_T_FORMAT in appropriate places
> Still, most of the configuration work is already done in Autoconf (see
> AC_FUNC_FSEEKO and AC_SYS_LARGEFILE), so the work might be significantly
> less than the time spent debating the merits of large files on these
> lists. ;-)
Since running autoconf isn't part of a normal build, I'm not familiar
with that. Can autoconf make any of the above unnecessary?
--
Oliver Elphick [EMAIL PROTECTED]
Isle of Wight, UK
http://www.lfix.co.uk/oliver
GPG: 1024D/3E1D0C1C: CA12 09E0 E8D5 8870 5839 932A 614D 4C34 3E1D 0C1C
========================================
"Watch ye therefore, and pray always, that ye may be
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come to pass, and to stand before the Son of man."
Luke 21:36
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