7 int fcntl(int fd, int cmd, ...)
12 arg = va_arg(ap, unsigned long);
14 if (cmd == F_SETFL) arg |= O_LARGEFILE;
15 if (cmd == F_SETLKW) return syscall_cp(SYS_fcntl, fd, cmd, (void *)arg);
16 if (cmd == F_GETOWN) {
18 int ret = __syscall(SYS_fcntl, fd, F_GETOWN_EX, &ex);
19 if (ret == -EINVAL) return __syscall(SYS_fcntl, fd, cmd, (void *)arg);
20 if (ret) return __syscall_ret(ret);
21 return ex.type == F_OWNER_PGRP ? -ex.pid : ex.pid;
23 if (cmd == F_DUPFD_CLOEXEC) {
24 int ret = __syscall(SYS_fcntl, fd, F_DUPFD_CLOEXEC, arg);
27 __syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
28 return __syscall_ret(ret);
30 ret = __syscall(SYS_fcntl, fd, F_DUPFD_CLOEXEC, 0);
32 if (ret >= 0) __syscall(SYS_close, ret);
33 return __syscall_ret(-EINVAL);
35 ret = __syscall(SYS_fcntl, fd, F_DUPFD, arg);
36 if (ret >= 0) __syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
37 return __syscall_ret(ret);
44 return syscall(SYS_fcntl, fd, cmd, (void *)arg);
46 return syscall(SYS_fcntl, fd, cmd, arg);