freebsd-dev

History

Juli Mallett 49d54362f1 Bogusness may have happened using a variable assignment here before, but proper parens mean that fd is always set by open(2) [in any part of C], and so we can accurately check for it returning -1, without feeling like we need to initialise fd to -1 in its declaration. In other words, fix a stylistic/bogus nit.		2002-06-20 07:15:55 +00:00
..
test
buf.c	Bogusness may have happened using a variable assignment here before, but	2002-06-20 07:15:55 +00:00
cbc.c
ed.1
ed.h
glbl.c
io.c
main.c
Makefile
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.