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Create wrapper pgwin32_safestat() and redefine stat() to it

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on win32, because the stat() function in the runtime cannot
be trusted to always update the st_size field.

Per report and research by Sergey Zubkovsky.
This commit is contained in:
Magnus Hagander
2008-04-10 16:58:51 +00:00
parent a57a1e61a1
commit 47a19a495d
2 changed files with 49 additions and 2 deletions
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36
src/port/dirmod.c
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@ -10,7 +10,7 @@
* Win32 (NT, Win2k, XP). replace() doesn't work on Win95/98/Me.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/port/dirmod.c,v 1.51 2008/01/01 19:46:00 momjian Exp $
* $PostgreSQL: pgsql/src/port/dirmod.c,v 1.52 2008/04/10 16:58:51 mha Exp $
*
*-------------------------------------------------------------------------
*/
@ -447,3 +447,37 @@ report_and_fail:
pgfnames_cleanup(filenames);
return false;
}
#ifdef WIN32
/*
* The stat() function in win32 is not guaranteed to update the st_size
* field when run. So we define our own version that uses the Win32 API
* to update this field.
*/
#undef stat
int
pgwin32_safestat(const char *path, struct stat *buf)
{
int r;
WIN32_FILE_ATTRIBUTE_DATA attr;
r = stat(path, buf);
if (r < 0)
return r;
if (!GetFileAttributesEx(path, GetFileExInfoStandard, &attr))
{
_dosmaperr(GetLastError());
return -1;
}
/*
* XXX no support for large files here, but we don't do that in
* general on Win32 yet.
*/
buf->st_size = attr.nFileSizeLow;
return 0;
}
#endif