1999-08-27 23:15:48 +00:00
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$FreeBSD$
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1994-09-24 02:59:15 +00:00
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1993-06-18 13:00:14 +00:00
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ed is an 8-bit-clean, POSIX-compliant line editor. It should work with
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any regular expression package that conforms to the POSIX interface
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standard, such as GNU regex(3).
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If reliable signals are supported (e.g., POSIX sigaction(2)), it should
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1994-02-01 00:36:28 +00:00
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compile with little trouble. Otherwise, the macros SPL1() and SPL0()
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1993-06-18 13:00:14 +00:00
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should be redefined to disable interrupts.
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The following compiler directives are recognized:
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1994-02-01 00:36:28 +00:00
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DES - to add encryption support (requires crypt(3))
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NO_REALLOC_NULL - if realloc(3) does not accept a NULL pointer
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BACKWARDS - for backwards compatibility
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NEED_INSQUE - if insque(3) is missing
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1993-06-18 13:00:14 +00:00
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The file `POSIX' describes extensions to and deviations from the POSIX
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standard.
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The ./test directory contains regression tests for ed. The README
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file in that directory explains how to run these.
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For a description of the ed algorithm, see Kernighan and Plauger's book
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"Software Tools in Pascal," Addison-Wesley, 1981.
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