>No, that will work fine since the file offset is ignored in O_APPEND mode >and writes are serialized by lower-level (file system) mechanisms. >(Note that I used O_APPEND for the output file in my test program.) > >>> I would appreciate it if some people out there would run this test >>> on other systems (Red Hat Linux, NETBSD, Apple OS X, HP-UX, IRIX) >>> and post the results. >> >> I tried to run the test on the following systems: >> >> 2.6.32-27-generic-pae #49-Ubuntu SMP >> 2.6.18-194.el5 #1 SMP (Red Hat) >> 2.6.16.60-0.21-smp #1 SMP (SUSE) >> >> It failed on all of them. >> >> Thanks, >> Dmitry > >Thanks for running the test,
I'm not really surprised, when multiple threads read from the same fd, are we supposed to serialize all the reads to make sure that you can't have concurrent reads starting at the same offset? I don't think that POSIX prevents that. How does it fail on the Linux kernels? On Solaris, the output file is somewhat larger but not much (when using tmpfs) Casper _______________________________________________ ksh93-integration-discuss mailing list ksh93-integration-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/ksh93-integration-discuss
