1993-06-18 13:00:14 +00:00
|
|
|
ed is an 8-bit-clean, POSIX-compliant line editor. It should work with
|
|
|
|
|
any regular expression package that conforms to the POSIX interface
|
|
|
|
|
standard, such as GNU regex(3).
|
|
|
|
|
|
|
|
|
|
If reliable signals are supported (e.g., POSIX sigaction(2)), it should
|
1994-02-01 00:36:28 +00:00
|
|
|
compile with little trouble. Otherwise, the macros SPL1() and SPL0()
|
1993-06-18 13:00:14 +00:00
|
|
|
should be redefined to disable interrupts.
|
|
|
|
|
|
|
|
|
|
The following compiler directives are recognized:
|
1994-02-01 00:36:28 +00:00
|
|
|
DES - to add encryption support (requires crypt(3))
|
|
|
|
|
NO_REALLOC_NULL - if realloc(3) does not accept a NULL pointer
|
|
|
|
|
BACKWARDS - for backwards compatibility
|
|
|
|
|
NEED_INSQUE - if insque(3) is missing
|
1993-06-18 13:00:14 +00:00
|
|
|
|
|
|
|
|
The file `POSIX' describes extensions to and deviations from the POSIX
|
|
|
|
|
standard.
|
|
|
|
|
|
|
|
|
|
The ./test directory contains regression tests for ed. The README
|
|
|
|
|
file in that directory explains how to run these.
|
|
|
|
|
|
|
|
|
|
For a description of the ed algorithm, see Kernighan and Plauger's book
|
|
|
|
|
"Software Tools in Pascal," Addison-Wesley, 1981.
|
