On Jul 19 10:56, jojelino wrote: > On 2013-07-18 PM 5:59, Corinna Vinschen wrote:> On Jul 18 17:11, > jojelino wrote: > >> On 2013-07-18 AM 10:53, Warren Young wrote: > >>> Nothing so simple. Locking is handled at the OS and/or Cygwin DLL > >>> level. The build change between 3.7.16.2 and 3.7.17-3 is that > we're now > >>> relying on new features in the Cygwin DLL to do Windows-style > locking by > >>> default. > >>> > >>> Older versions of Cygwin SQLite bypassed the Cygwin DLL entirely for > >>> this, going straight to the Win32 API, thereby preventing the DLL from > >>> interposing itself for the "posix" case. > >>> > >> Mandatory locking feature of cygwin used in sqlite is broken. > > > > Simple testcase in plain C?
Thanks, but... > #include <stdio.h> > #include <fcntl.h> > #include <assert.h> > #include <string.h> > #include <sys/file.h> > int > main() > { > int fd = open("asdf.txt", O_BINARY | O_RDWR | O_NOINHERIT | O_CREAT); > const char* buf = > "KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK\0"; > int i=0; > write(fd, buf, strlen(buf)); > fcntl(fd,F_LCK_MANDATORY,0); > assert(flock(fd,F_SETOWN)==0); ^^^^^^^^ F_SETOWN is no valid flag for flock(2). Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple