> If that is indeed the case, the current code will cause corruption on an > EINTR on such platforms because the EINTR handling does not account for a > non-0 write.
No, it won't cause corruption. Because SQLite uses pwrite or its alternative with calls to lseek and write. So after interruption it will start writing at the same position it wrote previous time rewriting part of what it has already written with the same data. Pavel On Fri, Aug 19, 2011 at 8:48 AM, Stephan Beal <sgb...@googlemail.com> wrote: > On Thu, Aug 18, 2011 at 6:10 PM, Stephan Beal <sgb...@googlemail.com> wrote: > >> On Thu, Aug 18, 2011 at 5:27 PM, David Garfield < >> garfi...@irving.iisd.sra.com> wrote: >> >>> I HOPE that an interrupt in a large interrupted write will NOT return >> >> EINTR, because if it does, the partial write is screwed up. >>> >> >> i hope so, too! :-D >> > > It would seem that at least one environment does allow that behaviour. From > the Linux write(2) man pages: > > ---- > CONFORMING TO > SVr4, 4.3BSD, POSIX.1-2001. > > Under SVr4 a write may be interrupted and return EINTR at any point, > not just before any data is written. > ---- > > So this just might actually (potentially) affect some sqlite3 users. i don't > know if Solaris currently uses SysV or posix semantics, but Solaris was once > known as SVr4 (SysV, v.4)? > > If that is indeed the case, the current code will cause corruption on an > EINTR on such platforms because the EINTR handling does not account for a > non-0 write. > > http://kb.iu.edu/data/agjs.html > http://en.wikipedia.org/wiki/System_V > The German page has release dates and easier-to-read inheritance details: > http://de.wikipedia.org/wiki/System_V > http://en.wikipedia.org/wiki/Solaris_(operating_system) > > -- > ----- stephan beal > http://wanderinghorse.net/home/stephan/ > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
