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Diffstat (limited to 'bin/ed/README')
| -rw-r--r-- | bin/ed/README | 23 |
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diff --git a/bin/ed/README b/bin/ed/README new file mode 100644 index 000000000000..da11f9b0f32a --- /dev/null +++ b/bin/ed/README @@ -0,0 +1,23 @@ +$FreeBSD$ + +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: +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. |