from 42 user/bin/cp/cp.c copy(const char *from, const char *to) from 52 user/bin/cp/cp.c fromfd = open(from, O_RDONLY); from 54 user/bin/cp/cp.c err(1, "%s", from); from 85 user/bin/cp/cp.c err(1, "%s", from); from 89 user/bin/cp/cp.c err(1, "%s: close", from);