1*18ccd94eSSascha Wildner$FreeBSD: head/bin/ed/README 50471 1999-08-27 23:15:48Z peter $ 2984263bcSMatthew Dillon 3984263bcSMatthew Dilloned is an 8-bit-clean, POSIX-compliant line editor. It should work with 4984263bcSMatthew Dillonany regular expression package that conforms to the POSIX interface 5984263bcSMatthew Dillonstandard, such as GNU regex(3). 6984263bcSMatthew Dillon 7984263bcSMatthew DillonIf reliable signals are supported (e.g., POSIX sigaction(2)), it should 8984263bcSMatthew Dilloncompile with little trouble. Otherwise, the macros SPL1() and SPL0() 9984263bcSMatthew Dillonshould be redefined to disable interrupts. 10984263bcSMatthew Dillon 11984263bcSMatthew DillonThe following compiler directives are recognized: 12984263bcSMatthew DillonDES - to add encryption support (requires crypt(3)) 13984263bcSMatthew DillonNO_REALLOC_NULL - if realloc(3) does not accept a NULL pointer 14984263bcSMatthew DillonBACKWARDS - for backwards compatibility 15984263bcSMatthew DillonNEED_INSQUE - if insque(3) is missing 16984263bcSMatthew Dillon 17984263bcSMatthew DillonThe file `POSIX' describes extensions to and deviations from the POSIX 18984263bcSMatthew Dillonstandard. 19984263bcSMatthew Dillon 20984263bcSMatthew DillonThe ./test directory contains regression tests for ed. The README 21984263bcSMatthew Dillonfile in that directory explains how to run these. 22984263bcSMatthew Dillon 23984263bcSMatthew DillonFor a description of the ed algorithm, see Kernighan and Plauger's book 24984263bcSMatthew Dillon"Software Tools in Pascal," Addison-Wesley, 1981. 25