Hi: On Fri, Dec 26, 2008 at 1:32 PM, ajit mote <[email protected]> wrote:
> > > On Fri, Dec 26, 2008 at 10:34 AM, shark huang <[email protected]> wrote: > >> Hi: >> Thanks. >> >> On Fri, Dec 26, 2008 at 12:05 PM, ajit mote <[email protected]>wrote: >> >>> >>> >>> On Thu, Dec 25, 2008 at 7:39 AM, shark huang <[email protected]> wrote: >>> >>>> How can I know who own the semaphore at one moment? >>>> >>> >>> ipcs -s >>> >> 'cat /proc/sysvipc/sem' should be same. >> >> >>> >>> >>> >>>> On Thu, Dec 25, 2008 at 12:26 AM, shark huang <[email protected]>wrote: >>>> >>>>> Hi: is the value of cuid and uid always same? Looks like they only >>>>> are given a same value in function "ipc_addid", which means the value was >>>>> initialized when the semaphore is created. >>>>> >>>> > When performing the first task, the process which calls *semget* becomes > the owner/creator, and Remember, ownership can be changed, but the creating > process always remains the creator. So values of uid and cuid may not be > always same. > Several user can operate one semaphore at the same time, so how to decide who is the owner ? Could you show me in source code？ > > > >>>>> br >>>>> shark >>>>> >>>>> > Note: Please send mail to mailing list, this way everybody will be reading > the thread > >> >>>> >>> >>> >>> -- >>> Thanks & Regards, >>> Ajit Subhash Mote >>> >>> >> > > > -- > Thanks & Regards, > Ajit Subhash Mote > >
