On Tue, Jun 22, 2010 at 8:16 AM, Sergio Sobarzo <ssobarzo@xxxxxxxxx> wrote:
> Hi,
>
> I'm writing an application using semaphores. Here is a simple code
> recreating the problem:
>
> ***********************************************
> #include <sys/types.h>
> #include <stdio.h>
> #include <semaphore.h>
> #include <sys/types.h>
> #include <sys/stat.h>
> #include <fcntl.h>
> #include <stdlib.h>
>
> int main()
> {
> int ok;
> //key_t t;
> char *shm,*s;
> sem_t *mutex;
>
> mutex = sem_open("/vik",O_CREAT|O_EXCL);
> if(mutex == SEM_FAILED)
> {
> perror("unable to create semaphore");
> sem_unlink("vik");
> exit(-1);
> }
>
> sem_close(mutex);
> sem_unlink("vik");
> exit(0);
> }
> ************************************************
The man page for sem_open says that if you include O_CREAT as a flag
you must also provide the mode and value arguments. Have you tried
that?
P.S. - This isn't a gcc issue - you should probably post this to a
general UNIX programming list.
Best,
--
Andrew Bell
andrew.bell.ia@xxxxxxxxx
