tag	line	file	source code
oldfd	38	fs/fcntl.c	int sys_dup2(unsigned int oldfd, unsigned int newfd)
oldfd	40	fs/fcntl.c	if (newfd == oldfd)
oldfd	43	fs/fcntl.c	return dupfd(oldfd,newfd);
oldfd	140	include/unistd.h	int dup2(int oldfd, int newfd);