mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 20:22:09 +00:00
e1fd1f490f
just have the bugger take unsigned long and deal with SETVAL case (when we use an int member in the union) explicitly. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/*
|
|
* sys_ipc() is the old de-multiplexer for the SysV IPC calls.
|
|
*
|
|
* This is really horribly ugly, and new architectures should just wire up
|
|
* the individual syscalls instead.
|
|
*/
|
|
#include <linux/unistd.h>
|
|
|
|
#ifdef __ARCH_WANT_SYS_IPC
|
|
#include <linux/errno.h>
|
|
#include <linux/ipc.h>
|
|
#include <linux/shm.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
|
|
unsigned long, third, void __user *, ptr, long, fifth)
|
|
{
|
|
int version, ret;
|
|
|
|
version = call >> 16; /* hack for backward compatibility */
|
|
call &= 0xffff;
|
|
|
|
switch (call) {
|
|
case SEMOP:
|
|
return sys_semtimedop(first, (struct sembuf __user *)ptr,
|
|
second, NULL);
|
|
case SEMTIMEDOP:
|
|
return sys_semtimedop(first, (struct sembuf __user *)ptr,
|
|
second,
|
|
(const struct timespec __user *)fifth);
|
|
|
|
case SEMGET:
|
|
return sys_semget(first, second, third);
|
|
case SEMCTL: {
|
|
unsigned long arg;
|
|
if (!ptr)
|
|
return -EINVAL;
|
|
if (get_user(arg, (unsigned long __user *) ptr))
|
|
return -EFAULT;
|
|
return sys_semctl(first, second, third, arg);
|
|
}
|
|
|
|
case MSGSND:
|
|
return sys_msgsnd(first, (struct msgbuf __user *) ptr,
|
|
second, third);
|
|
case MSGRCV:
|
|
switch (version) {
|
|
case 0: {
|
|
struct ipc_kludge tmp;
|
|
if (!ptr)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&tmp,
|
|
(struct ipc_kludge __user *) ptr,
|
|
sizeof(tmp)))
|
|
return -EFAULT;
|
|
return sys_msgrcv(first, tmp.msgp, second,
|
|
tmp.msgtyp, third);
|
|
}
|
|
default:
|
|
return sys_msgrcv(first,
|
|
(struct msgbuf __user *) ptr,
|
|
second, fifth, third);
|
|
}
|
|
case MSGGET:
|
|
return sys_msgget((key_t) first, second);
|
|
case MSGCTL:
|
|
return sys_msgctl(first, second, (struct msqid_ds __user *)ptr);
|
|
|
|
case SHMAT:
|
|
switch (version) {
|
|
default: {
|
|
unsigned long raddr;
|
|
ret = do_shmat(first, (char __user *)ptr,
|
|
second, &raddr, SHMLBA);
|
|
if (ret)
|
|
return ret;
|
|
return put_user(raddr, (unsigned long __user *) third);
|
|
}
|
|
case 1:
|
|
/*
|
|
* This was the entry point for kernel-originating calls
|
|
* from iBCS2 in 2.2 days.
|
|
*/
|
|
return -EINVAL;
|
|
}
|
|
case SHMDT:
|
|
return sys_shmdt((char __user *)ptr);
|
|
case SHMGET:
|
|
return sys_shmget(first, second, third);
|
|
case SHMCTL:
|
|
return sys_shmctl(first, second,
|
|
(struct shmid_ds __user *) ptr);
|
|
default:
|
|
return -ENOSYS;
|
|
}
|
|
}
|
|
#endif
|