oldfd 36 usr/lib/posix/file/dup.c dup(int oldfd) oldfd 41 usr/lib/posix/file/dup.c m.data[0] = oldfd; oldfd 38 usr/lib/posix/file/dup2.c dup2(int oldfd, int newfd) oldfd 43 usr/lib/posix/file/dup2.c m.data[0] = oldfd;