1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
#include <sys/sem.h>
#include <stdarg.h>
#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, ...)
{
union semun arg = {0};
va_list ap;
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 | IPC_64, &arg.buf);
#endif
}
|