+#define _GNU_SOURCE
#include <fcntl.h>
#include <unistd.h>
#include <stdarg.h>
+#include <errno.h>
#include "syscall.h"
#include "libc.h"
int fcntl(int fd, int cmd, ...)
{
- int r;
long arg;
va_list ap;
va_start(ap, cmd);
arg = va_arg(ap, long);
va_end(ap);
if (cmd == F_SETFL) arg |= O_LARGEFILE;
- if (cmd == F_SETLKW) CANCELPT_BEGIN;
- r = syscall(SYS_fcntl, fd, cmd, arg);
- if (cmd == F_SETLKW) CANCELPT_END;
- return r;
+ if (cmd == F_SETLKW) return syscall_cp(SYS_fcntl, fd, cmd, arg);
+ if (cmd == F_GETOWN) {
+ struct f_owner_ex ex;
+ int ret = __syscall(SYS_fcntl, fd, F_GETOWN_EX, &ex);
+ if (ret == -EINVAL) return __syscall(SYS_fcntl, fd, cmd, arg);
+ if (ret) return __syscall_ret(ret);
+ return ex.type == F_OWNER_PGRP ? -ex.pid : ex.pid;
+ }
+ if (cmd == F_DUPFD_CLOEXEC) {
+ int ret = __syscall(SYS_fcntl, fd, F_DUPFD_CLOEXEC, arg);
+ if (ret != -EINVAL) {
+ if (ret >= 0)
+ __syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
+ return __syscall_ret(ret);
+ }
+ ret = __syscall(SYS_fcntl, fd, F_DUPFD_CLOEXEC, 0);
+ if (ret != -EINVAL) {
+ if (ret >= 0) __syscall(SYS_close, ret);
+ return __syscall_ret(-EINVAL);
+ }
+ ret = __syscall(SYS_fcntl, fd, F_DUPFD, arg);
+ if (ret >= 0) __syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
+ return __syscall_ret(ret);
+ }
+ return syscall(SYS_fcntl, fd, cmd, arg);
}
-
-LFS64(fcntl);