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
29
30
31
32
33
34
35
36
37
|
#include <fcntl.h>
#include <stdarg.h>
#include <syscall.h>
int fcntl(int fildes, int cmd, ...)
{
unsigned long arg;
va_list ap;
va_start(ap, cmd);
arg = va_arg(ap, unsigned long);
va_end(ap);
if (cmd == F_DUPFD_CLOEXEC) {
int ret = syscall(fcntl, fildes, F_DUPFD_CLOEXEC, arg);
if (ret != -EINVAL) {
if (ret >= 0)
syscall(fcntl, ret, F_SETFD, FD_CLOEXEC);
return __syscall_ret(ret);
}
ret = syscall(fcntl, fildes, F_DUPFD_CLOEXEC, 0);
if (ret != -EINVAL) {
if (ret >= 0)
__syscall(close, ret);
return __syscall_ret(-EINVAL);
}
ret = syscall(fcntl, fildes, F_DUPFD, arg);
if (ret >= 0)
syscall(fcntl, ret, F_SETFD, FD_CLOEXEC);
return __syscall_ret(ret);
}
return syscall(fcntl, fildes, cmd);
}
|
