100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/*
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* sys_ipc() is the old de-multiplexer for the SysV IPC calls.
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*
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* This is really horribly ugly, and new architectures should just wire up
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* the individual syscalls instead.
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*/
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#include <linux/unistd.h>
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#ifdef __ARCH_WANT_SYS_IPC
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#include <linux/errno.h>
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#include <linux/ipc.h>
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#include <linux/shm.h>
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#include <linux/syscalls.h>
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#include <linux/uaccess.h>
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SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, int, second,
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unsigned long, third, void __user *, ptr, long, fifth)
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{
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int version, ret;
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version = call >> 16; /* hack for backward compatibility */
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call &= 0xffff;
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switch (call) {
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case SEMOP:
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return sys_semtimedop(first, (struct sembuf __user *)ptr,
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second, NULL);
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case SEMTIMEDOP:
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return sys_semtimedop(first, (struct sembuf __user *)ptr,
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second,
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(const struct timespec __user *)fifth);
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case SEMGET:
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return sys_semget(first, second, third);
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case SEMCTL: {
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union semun fourth;
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if (!ptr)
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return -EINVAL;
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if (get_user(fourth.__pad, (void __user * __user *) ptr))
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return -EFAULT;
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return sys_semctl(first, second, third, fourth);
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}
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case MSGSND:
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return sys_msgsnd(first, (struct msgbuf __user *) ptr,
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second, third);
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case MSGRCV:
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switch (version) {
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case 0: {
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struct ipc_kludge tmp;
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if (!ptr)
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return -EINVAL;
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if (copy_from_user(&tmp,
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(struct ipc_kludge __user *) ptr,
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sizeof(tmp)))
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return -EFAULT;
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return sys_msgrcv(first, tmp.msgp, second,
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tmp.msgtyp, third);
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}
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default:
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return sys_msgrcv(first,
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(struct msgbuf __user *) ptr,
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second, fifth, third);
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}
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case MSGGET:
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return sys_msgget((key_t) first, second);
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case MSGCTL:
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return sys_msgctl(first, second, (struct msqid_ds __user *)ptr);
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case SHMAT:
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switch (version) {
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default: {
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unsigned long raddr;
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ret = do_shmat(first, (char __user *)ptr,
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second, &raddr);
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if (ret)
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return ret;
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return put_user(raddr, (unsigned long __user *) third);
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}
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case 1:
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/*
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* This was the entry point for kernel-originating calls
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* from iBCS2 in 2.2 days.
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*/
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return -EINVAL;
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}
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case SHMDT:
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return sys_shmdt((char __user *)ptr);
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case SHMGET:
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return sys_shmget(first, second, third);
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case SHMCTL:
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return sys_shmctl(first, second,
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(struct shmid_ds __user *) ptr);
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default:
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return -ENOSYS;
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}
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}
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#endif
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