1$OpenBSD: README,v 1.5 2018/06/15 08:46:24 martijn Exp $ 2$NetBSD: README,v 1.9 1995/03/21 09:04:33 cgd Exp $ 3 4ed is an 8-bit-clean, POSIX-compliant line editor. It should work with 5any regular expression package that conforms to the POSIX interface 6standard, such as GNU regex(3). 7 8If reliable signals are supported (e.g., POSIX sigaction(2)), it should 9compile with little trouble. Otherwise, the macros SPL1() and SPL0() 10should be redefined to disable interrupts. 11 12The file `POSIX' describes extensions to and deviations from the POSIX 13standard. 14 15The ./test directory contains regression tests for ed. The README 16file in that directory explains how to run these. 17 18For a description of the ed algorithm, see Kernighan and Plauger's book 19"Software Tools in Pascal," Addison-Wesley, 1981. 20