1#include <unistd.h>
 2#include <errno.h>
 3#include <fcntl.h>
 4#include "syscall.h"
 5
 6int fchown(int fd, uid_t uid, gid_t gid)
 7{
 8	int ret = __syscall(SYS_fchown, fd, uid, gid);
 9	if (ret != -EBADF || __syscall(SYS_fcntl, fd, F_GETFD) < 0)
10		return __syscall_ret(ret);
11
12	char buf[15+3*sizeof(int)];
13	__procfdname(buf, fd);
14#ifdef SYS_chown
15	return syscall(SYS_chown, buf, uid, gid);
16#else
17	return syscall(SYS_fchownat, AT_FDCWD, buf, uid, gid, 0);
18#endif
19
20}