z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

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ed
need to specify addresses for certain subcommands that use default addresses.
Consult the description for a particular subcommand. You can construct each
address out of the following components:
. The single dot character represents the current line in the buffer. Many
subcommands set the current line; for example the e command sets it to
the last line of the new file being edited.
$ The dollar sign refers to the last line in the buffer.
n The number n refers to the nth line in the buffer.
/regexp/
This searches for a line containing a string that matches the regular
expression, regexp. (For information on regular expressions, see
Appendix F.) The search begins at the line immediately following the current
line. It proceeds forward through the buffer; if ed reaches the end of the
buffer without finding a match, it wraps around to the first line of the buffer
and continues the search. If ed does not find a match, the search ends
when it reaches the original current line. If it does find a match, the address
/regexp/ refers to the first matching line. If you omit regexp, the last used
regular expression becomes the object of the search. You can omit the
trailing /. Within regexp, \/ represents a literal slash and not the regexp
delimiter.
?regexp?
This is similar to the previous address form, except that the search goes
backward through the buffer. If the search reaches the first line in the buffer
without finding a match, ed wraps around and continues searching
backward from the last line in the buffer. If you omit regexp, the last used
regular expression becomes the object of the search. You can omit the
trailing ?. Within regexp, \? represents a literal question mark and not the
regexp delimiter.
'l The address is the line marked with the mark name l. The name l must be
a lowercase letter set by the k subcommand.
You can combine these basic addresses with numbers using the + and – operators,
with the usual interpretation. Missing left operands default to . (dot); missing right
operands default to 1. Missing right operands also have a cumulative effect; so an
address of – – refers to the current line number less two.
You can specify address ranges in the following ways:
a1,a2 Specifies a range of addresses from address a1 to address a2, inclusive. If
you omit a1 and a2 (that is, the comma alone is specified), this is
equivalent to the range 1,$.
a1;a2 Is similar to the previous form except that ed resets the current line after
calculating the first address, a1, so that the second address, a2, is relative
to a1. If you omit a1 and a2 (that is, the semicolon alone is specified), this
is equivalent to .;$. If you specify only a1 and the command requires both
a1 and a2, the command operates as though you specified a range of:
a1;. command
> Is equivalent to .,.+22 (that is, page forward), except that it never attempts
to address any line beyond $.
< Is equivalent to .–22,. (that is, page backward), except that it never
addresses any line before line 1.
248 z/OS V1R9.0 UNIX System Services Command Reference