freebsd-skq

History

Colin Percival d37df47d31 Join the 21st century: Cryptography is no longer an optional component of releases. The -DNOCRYPT build option still exists for anyone who really wants to build non-cryptographic binaries, but the "crypto" release distribution is now part of "base", and anyone installing from a release will get cryptographic binaries. Approved by: re (scottl), markm Discussed on: freebsd-current, in late April 2004		2004-08-06 07:27:08 +00:00
..
test
buf.c
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.