Home | History | Annotate | Line # | Download | only in ed
README revision 1.6 
      1 ed is an 8-bit-clean, POSIX-compliant line editor.  It should work with
      2 any regular expression package that conforms to the POSIX interface
      3 standard, such as GNU regex(3).
      4 
      5 If reliable signals are supported (e.g., POSIX sigaction(2)), it should
      6 compile with little trouble.  Otherwise, the macros spl1() and spl0()
      7 should be redefined to disable interrupts.
      8 
      9 The following compiler directives are recognized:
     10 DES		- use to add encryption support (requires crypt(3))
     11 NO_REALLOC_NULL	- use if realloc(3) does not accept a NULL pointer
     12 BACKWARDS	- use for backwards compatibility
     13 
     14 The file `POSIX' describes extensions to and deviations from the POSIX
     15 standard.
     16 
     17 The ./test directory contains regression tests for ed. The README
     18 file in that directory explains how to run these.
     19 
     20 For a description of the ed algorithm, see Kernighan and Plauger's book
     21 "Software Tools in Pascal," Addison-Wesley, 1981.
     22