#include "syscall.h"
#include "ipc.h"
+union semun {
+ int val;
+ struct semid_ds *buf;
+ unsigned short *array;
+};
+
int semctl(int id, int num, int cmd, ...)
{
- long arg;
+ union semun arg = {0};
va_list ap;
- va_start(ap, cmd);
- arg = va_arg(ap, long);
- va_end(ap);
-#ifdef __NR_semctl
- return syscall(SYS_semctl, id, num, cmd, arg);
+ switch (cmd) {
+ case SETVAL: case GETALL: case SETALL: case IPC_STAT: case IPC_SET:
+ case IPC_INFO: case SEM_INFO: case SEM_STAT:
+ va_start(ap, cmd);
+ arg = va_arg(ap, union semun);
+ va_end(ap);
+ }
+#ifdef SYS_semctl
+ return syscall(SYS_semctl, id, num, cmd | IPC_64, arg.buf);
#else
- return syscall(SYS_ipc, IPCOP_semctl, id, num, cmd | 0x100, &arg);
+ return syscall(SYS_ipc, IPCOP_semctl, id, num, cmd | IPC_64, &arg.buf);
#endif
}