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| | #include <sys/sem.h>
#include <stdarg.h>
#include <endian.h>
#include "syscall.h"
#include "ipc.h"
#if __BYTE_ORDER != __BIG_ENDIAN
#undef SYSCALL_IPC_BROKEN_MODE
#endif
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 SYSCALL_IPC_BROKEN_MODE
struct semid_ds tmp;
if (cmd == IPC_SET) {
tmp = *arg.buf;
tmp.sem_perm.mode *= 0x10000U;
arg.buf = &tmp;
}
#endif
#ifdef SYS_semctl
int r = __syscall(SYS_semctl, id, num, cmd | IPC_64, arg.buf);
#else
int r = __syscall(SYS_ipc, IPCOP_semctl, id, num, cmd | IPC_64, &arg.buf);
#endif
#ifdef SYSCALL_IPC_BROKEN_MODE
if (r >= 0) switch (cmd) {
case IPC_STAT:
case SEM_STAT:
case SEM_STAT_ANY:
arg.buf->sem_perm.mode >>= 16;
}
#endif
return __syscall_ret(r);
}
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