On Thu, Apr 24, 2008 at 4:49 PM, Ulrich Drepper <drepper@xxxxxxxxxx> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > > Michael Kerrisk wrote: > > * dup2() -- use fcntl(F_DUPFD) instead > > Wrong. You cannot implement dup2 with fcntl since the latter won't use > a file descriptor which is already in use. True. One could add a flag to fcntl() to provide that behavior. > > So the alternative to sys_indirect(), at least for the purpose of > > O_CLOEXEC and similar, would be to create 5 new system calls (or six, > > if one finds the signalfd() hack too ugly, which perhaps it is; or 7 > > if one doesn't like Alan's suggestion for socket() > > Without changing the socket interfaces (plural, socketpair) there would Yes, I overlooked socket pair()... > have to be 7 new syscalls, with changing socket* to an IMO cleaner > interface 9. > > > Or we just add sys_indirect (which is also usable for other syscall > extensions, not just the CLOEXEC stuff) and let userlevel (i.e., me) > worry about adding new interfaces to libc. As you can see, for the more > recent interfaces like signalfd I have already added an additional > parameter so the number of interface changes would be reduced. > > Somebody please make a call and then let's go on with life. I don't > care much either way anymore. I do hope nobody thinks this is an issue > which can be completely ignored (see, e.g., the bug I pointed to the > other day). Since I had to go search, here it is again http://bugzilla.redhat.com/show_bug.cgi?id=443321 -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
