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History

Ulrich Spörlein 55fa734d20 ed(1): make WARNS=6 clean Although argc and argv are never read after the longjmp is complete, gcc is not clever enough to see that and needlessly warns about it. So add volatile to silence the compiler. Approved by: ed (the co-mentor, not ed(1))		2010-03-04 16:08:01 +00:00
..
test
buf.c
cbc.c
ed.1	Add the new standard EXIT STATUS section where appropriate.	2005-01-16 16:41:59 +00:00
ed.h	/*- or .\"- or #- to begin license clauses.	2005-01-10 08:39:26 +00:00
glbl.c
io.c
main.c	ed(1): make WARNS=6 clean	2010-03-04 16:08:01 +00:00
Makefile	ed(1): make WARNS=6 clean	2010-03-04 16:08:01 +00:00
POSIX
re.c
README
sub.c
undo.c

README

$FreeBSD$

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.