freebsd-dev/bin/ed
Wolfram Schneider b8923d4cc0 [HISTORY] command appeared in Version 1 AT&T UNIX
Obtained from: A Quarter Century of UNIX, Peter H. Salus, page 41
1996-08-29 18:06:19 +00:00
..
test Bring in my changes for removing the pestilent obj links (unless you 1996-06-24 04:26:21 +00:00
buf.c Remove trailing whitespace. 1995-05-30 00:07:29 +00:00
cbc.c Localize it 1996-08-11 16:48:11 +00:00
ed.1 [HISTORY] command appeared in Version 1 AT&T UNIX 1996-08-29 18:06:19 +00:00
ed.h Nuked #ifdef __386BSD__ since this is not appropriate and no longer defined 1994-11-03 21:46:55 +00:00
glbl.c Remove trailing whitespace. 1995-05-30 00:07:29 +00:00
io.c Output line count to stdout. Complies to POSIX.2. 1996-05-23 06:36:34 +00:00
main.c Localize it 1996-08-11 16:48:11 +00:00
Makefile Wrong library was picked by ed 1995-10-22 20:14:13 +00:00
POSIX Added $Id$ 1994-09-24 02:59:15 +00:00
re.c Remove trailing whitespace. 1995-05-30 00:07:29 +00:00
README Added $Id$ 1994-09-24 02:59:15 +00:00
sub.c Remove trailing whitespace. 1995-05-30 00:07:29 +00:00
undo.c Added $Id$ 1994-09-24 02:59:15 +00:00

$Id$

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
compile with little trouble.  Otherwise, the macros SPL1() and SPL0()
should be redefined to disable interrupts.

The following compiler directives are recognized:
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

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.