I have cygserver running in the background (default options) on
a W2K box.
CYGWIN is set to 'server'.
The following test program:
#include <sys/shm.h>
#include <errno.h>
int
main(int argc, char **argv)
{
int pid = fork();
int id;
if (pid == 0) {
sleep(5);
id = shmget(1, 100, 0666);
printf("child (%d): %d (%d)\n", getpid(), id, errno);
} else {
id = shmget(1, 100, 01666);
printf("parent (%d): %d (%d)\n", getpid(), id, errno);
sleep(10);
shmctl(id, IPC_RMID, 0);
}
return (0);
}
Produces the following output:
parent (35492): 196609 (0)
child (3876): 0 (0)
No errors are reported in the cygserver log.
This shows that:
1. The parent created the shared memory segment and got back its
ID (196609).
2. The child process tried to attach to the parent's shared memory
segment (using the same key = 1), but shmget() returned 0 with no
error!
Can anyone enlighten me as to what might be wrong?
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