1 #include <sys/sem.h>
2 #include <stdarg.h>
3 #include <endian.h>
4 #include <unsupported_api.h>
5
6 #include "syscall.h"
7 #include "ipc.h"
8
9 #if __BYTE_ORDER != __BIG_ENDIAN
10 #undef SYSCALL_IPC_BROKEN_MODE
11 #endif
12
13 union semun {
14 int val;
15 struct semid_ds *buf;
16 unsigned short *array;
17 };
18
semctl(int id,int num,int cmd,...)19 int semctl(int id, int num, int cmd, ...)
20 {
21 unsupported_api(__FUNCTION__);
22 union semun arg = {0};
23 va_list ap;
24 switch (cmd & ~IPC_TIME64) {
25 case SETVAL: case GETALL: case SETALL: case IPC_SET:
26 case IPC_INFO: case SEM_INFO:
27 case IPC_STAT & ~IPC_TIME64:
28 case SEM_STAT & ~IPC_TIME64:
29 case SEM_STAT_ANY & ~IPC_TIME64:
30 va_start(ap, cmd);
31 arg = va_arg(ap, union semun);
32 va_end(ap);
33 }
34 #ifdef SYSCALL_IPC_BROKEN_MODE
35 struct semid_ds tmp;
36 if (cmd == IPC_SET) {
37 tmp = *arg.buf;
38 tmp.sem_perm.mode *= 0x10000U;
39 arg.buf = &tmp;
40 }
41 #endif
42 #ifndef SYS_ipc
43 int r = __syscall(SYS_semctl, id, num, IPC_CMD(cmd), arg.buf);
44 #else
45 int r = __syscall(SYS_ipc, IPCOP_semctl, id, num, IPC_CMD(cmd), &arg.buf);
46 #endif
47 #ifdef SYSCALL_IPC_BROKEN_MODE
48 if (r >= 0) switch (cmd | IPC_TIME64) {
49 case IPC_STAT:
50 case SEM_STAT:
51 case SEM_STAT_ANY:
52 arg.buf->sem_perm.mode >>= 16;
53 }
54 #endif
55 #if IPC_TIME64
56 if (r >= 0 && (cmd&IPC_TIME64)) {
57 IPC_HILO(arg.buf, sem_otime);
58 IPC_HILO(arg.buf, sem_ctime);
59 }
60 #endif
61 return __syscall_ret(r);
62 }
63