f348d70a32
Implement the half-closed devices notifiation, by adding a new POLLRDHUP (and its alias EPOLLRDHUP) bit to the existing poll/select sets. Since the existing POLLHUP handling, that does not report correctly half-closed devices, was feared to be changed, this implementation leaves the current POLLHUP reporting unchanged and simply add a new bit that is set in the few places where it makes sense. The same thing was discussed and conceptually agreed quite some time ago: http://lkml.org/lkml/2003/7/12/116 Since this new event bit is added to the existing Linux poll infrastruture, even the existing poll/select system calls will be able to use it. As far as the existing POLLHUP handling, the patch leaves it as is. The pollrdhup-2.6.16.rc5-0.10.diff defines the POLLRDHUP for all the existing archs and sets the bit in the six relevant files. The other attached diff is the simple change required to sys/epoll.h to add the EPOLLRDHUP definition. There is "a stupid program" to test POLLRDHUP delivery here: http://www.xmailserver.org/pollrdhup-test.c It tests poll(2), but since the delivery is same epoll(2) will work equally. Signed-off-by: Davide Libenzi <davidel@xmailserver.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
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| adx | ||
| bigsur | ||
| cat68701 | ||
| cpu-sh2 | ||
| cpu-sh3 | ||
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| cqreek | ||
| dmida | ||
| dreamcast | ||
| ec3104 | ||
| edosk7705 | ||
| harp | ||
| hd64461 | ||
| hd64465 | ||
| hp6xx | ||
| hs7751rvoip | ||
| mpc1211 | ||
| overdrive | ||
| rts7751r2d | ||
| saturn | ||
| se | ||
| se7300 | ||
| se7751 | ||
| se73180 | ||
| sh03 | ||
| sh2000 | ||
| snapgear | ||
| systemh | ||
| a.out.h | ||
| adc.h | ||
| addrspace.h | ||
| atomic.h | ||
| auxvec.h | ||
| bitops.h | ||
| bug.h | ||
| bugs.h | ||
| byteorder.h | ||
| cache.h | ||
| cacheflush.h | ||
| checksum.h | ||
| clock.h | ||
| cputime.h | ||
| current.h | ||
| delay.h | ||
| div64.h | ||
| dma-mapping.h | ||
| dma.h | ||
| elf.h | ||
| emergency-restart.h | ||
| errno.h | ||
| fcntl.h | ||
| fixmap.h | ||
| flat.h | ||
| floppy.h | ||
| freq.h | ||
| futex.h | ||
| hardirq.h | ||
| hw_irq.h | ||
| ide.h | ||
| io.h | ||
| io_generic.h | ||
| ioctl.h | ||
| ioctls.h | ||
| ipc.h | ||
| ipcbuf.h | ||
| irq-sh7780.h | ||
| irq-sh73180.h | ||
| irq.h | ||
| kexec.h | ||
| keyboard.h | ||
| kgdb.h | ||
| kmap_types.h | ||
| linkage.h | ||
| local.h | ||
| machvec.h | ||
| machvec_init.h | ||
| mc146818rtc.h | ||
| microdev.h | ||
| mman.h | ||
| mmu.h | ||
| mmu_context.h | ||
| module.h | ||
| msgbuf.h | ||
| mutex.h | ||
| namei.h | ||
| numnodes.h | ||
| page.h | ||
| param.h | ||
| pci.h | ||
| percpu.h | ||
| pgalloc.h | ||
| pgtable-2level.h | ||
| pgtable.h | ||
| poll.h | ||
| posix_types.h | ||
| processor.h | ||
| ptrace.h | ||
| resource.h | ||
| rtc.h | ||
| rwsem.h | ||
| scatterlist.h | ||
| sections.h | ||
| segment.h | ||
| semaphore-helper.h | ||
| semaphore.h | ||
| sembuf.h | ||
| serial.h | ||
| setup.h | ||
| sh_bios.h | ||
| shmbuf.h | ||
| shmparam.h | ||
| sigcontext.h | ||
| siginfo.h | ||
| signal.h | ||
| smp.h | ||
| socket.h | ||
| sockios.h | ||
| spinlock.h | ||
| spinlock_types.h | ||
| stat.h | ||
| statfs.h | ||
| string.h | ||
| system.h | ||
| termbits.h | ||
| termios.h | ||
| thread_info.h | ||
| timer.h | ||
| timex.h | ||
| tlb.h | ||
| tlbflush.h | ||
| topology.h | ||
| types.h | ||
| uaccess.h | ||
| ubc.h | ||
| ucontext.h | ||
| unaligned.h | ||
| unistd.h | ||
| user.h | ||
| watchdog.h | ||
| xor.h | ||