mdoc(7) police: a bit of tidying.
This commit is contained in:
Ruslan Ermilov
parent
8108a14544
commit
73ca71fef9
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=99410
181
bin/ed/ed.1
181
bin/ed/ed.1
@ -12,7 +12,6 @@
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.Op Fl sx
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.Op Fl p Ar string
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.Op Ar file
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.LP
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.Nm red
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.Op Fl
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.Op Fl sx
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@ -32,7 +31,7 @@ mode, in which the only difference is that the editor restricts the
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use of filenames which start with
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.Ql \&!
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(interpreted as shell commands by
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.Nm ed )
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.Nm )
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or contain a
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.Ql \&/ .
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Note that editing outside of the current directory is only prohibited
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@ -53,7 +52,7 @@ Changes are made to this copy and not directly to
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itself.
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||||
Upon quitting
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.Nm ,
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any changes not explicitly saved with a
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any changes not explicitly saved with a
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.Em w
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command are lost.
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.Pp
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@ -88,11 +87,13 @@ When an input command, such as
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.Em c
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(change), is given,
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.Nm
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enters input mode. This is the primary means
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enters input mode.
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This is the primary means
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of adding text to a file.
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In this mode, no commands are available;
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instead, the standard input is written
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directly to the editor buffer. Lines consist of text up to and
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directly to the editor buffer.
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Lines consist of text up to and
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including a
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.Em newline
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character.
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@ -110,7 +111,8 @@ command deletes lines; the
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.Em m
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command moves lines, and so on.
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It is possible to modify only a portion of a line by means of replacement,
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as in the example above. However even here, the
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as in the example above.
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However even here, the
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.Em s
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command is applied to whole lines at a time.
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.Pp
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@ -128,7 +130,8 @@ commands have the structure:
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.Sm on
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.Pp
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The address(es) indicate the line or range of lines to be affected by the
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command. If fewer addresses are given than the command accepts, then
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command.
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If fewer addresses are given than the command accepts, then
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default addresses are supplied.
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.Sh OPTIONS
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The following options are available:
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@ -144,14 +147,17 @@ Prompt for an encryption key to be used in subsequent reads and writes
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.Em x
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command).
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.It Fl p Ar string
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Specify a command prompt. This may be toggled on and off with the
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Specify a command prompt.
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This may be toggled on and off with the
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.Em P
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command.
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.It Ar file
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Specify the name of a file to read. If
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Specify the name of a file to read.
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If
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.Ar file
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is prefixed with a
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bang (!), then it is interpreted as a shell command. In this case,
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bang (!), then it is interpreted as a shell command.
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In this case,
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what is read is
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the standard output of
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.Ar file
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@ -171,13 +177,15 @@ utility maintains a
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.Em current address
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which is
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typically supplied to commands as the default address when none is specified.
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When a file is first read, the current address is set to the last line
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of the file. In general, the current address is set to the last line
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When a file is first read, the current address is set to the last line
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of the file.
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In general, the current address is set to the last line
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affected by a command.
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.Pp
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A line address is
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constructed from one of the bases in the list below, optionally followed
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by a numeric offset. The offset may include any combination
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by a numeric offset.
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The offset may include any combination
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of digits, operators (i.e.,
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.Em + ,
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.Em -
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@ -197,8 +205,10 @@ and is legal wherever it makes sense.
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An address range is two addresses separated either by a comma or
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semi-colon.
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The value of the first address in a range cannot exceed the
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value of the second. If only one address is given in a range, then
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the second address is set to the given address. If an
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value of the second.
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If only one address is given in a range, then
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the second address is set to the given address.
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If an
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.Em n Ns -tuple
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of addresses is given where
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.Em "n\ >\ 2" ,
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@ -208,7 +218,8 @@ the
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If only one address is expected, then the last address is used.
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.Pp
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Each address in a comma-delimited range is interpreted relative to the
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current address. In a semi-colon-delimited range, the first address is
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current address.
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In a semi-colon-delimited range, the first address is
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used to set the current address, and the second address is interpreted
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relative to the first.
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.Pp
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@ -249,11 +260,13 @@ next line, where
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.Em n
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is a non-negative number.
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.It , or %
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The first through last lines in the buffer. This is equivalent to
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The first through last lines in the buffer.
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This is equivalent to
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the address range
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.Em 1,$ .
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.It ;
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The current through last lines in the buffer. This is equivalent to
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The current through last lines in the buffer.
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This is equivalent to
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the address range
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.Em .,$ .
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.It /re/
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@ -296,7 +309,8 @@ command for selecting old text to be replaced with new.
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.Pp
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In addition to a specifying string literals, regular expressions can
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represent
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classes of strings. Strings thus represented are said to be matched
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classes of strings.
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Strings thus represented are said to be matched
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by the corresponding regular expression.
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If it is possible for a regular expression
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to match several strings in a line, then the left-most longest match is
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@ -307,24 +321,43 @@ The following symbols are used in constructing regular expressions:
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.It c
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Any character
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.Em c
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not listed below, including `{', '}', `(', `)', `<' and `>',
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not listed below, including
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.Ql \&{ ,
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.Ql \&} ,
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.Ql \&( ,
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.Ql \&) ,
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.Ql <
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and
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.Ql > ,
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matches itself.
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.It Pf \e c
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Any backslash-escaped character
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.Em c ,
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except for `{', '}', `(', `)', `<' and `>',
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except for
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.Ql \&{ ,
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.Ql \&} ,
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.Ql \&( ,
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.Ql \&) ,
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.Ql <
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and
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.Ql > ,
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matches itself.
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.It .
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Match any single character.
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.It Op char-class
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Match any single character in
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.Em char-class .
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To include a `]'
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To include a
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.Ql \&]
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in
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.Em char-class ,
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it must be the first character.
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A range of characters may be specified by separating the end characters
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of the range with a `-', e.g., `a-z' specifies the lower case characters.
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of the range with a
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.Ql - ,
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e.g.,
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.Ql a-z
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specifies the lower case characters.
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The following literal expressions can also be used in
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.Em char-class
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to specify sets of characters:
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@ -335,7 +368,9 @@ to specify sets of characters:
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.It [:blank:] Ta [:graph:] Ta [:punct:] Ta [:xdigit:]
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.El
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.Pp
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If `-' appears as the first or last
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If
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.Ql -
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appears as the first or last
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character of
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.Em char-class ,
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then it matches itself.
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@ -402,21 +437,31 @@ where
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is a number in the range [1,9], expands to the text matched by the
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.Em n Ns th
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subexpression.
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For example, the regular expression `\e(.*\e)\e1' matches any string
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For example, the regular expression
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.Ql \e(.*\e)\e1
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matches any string
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consisting of identical adjacent substrings.
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Subexpressions are ordered relative to
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their left delimiter.
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.It *
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Match the single character regular expression or subexpression
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immediately preceding it zero or more times. If
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immediately preceding it zero or more times.
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If
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.Em *
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is the first
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character of a regular expression or subexpression, then it matches
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itself. The
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itself.
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The
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.Em *
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operator sometimes yields unexpected results.
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For example, the regular expression `b*' matches the beginning of
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the string `abbb' (as opposed to the substring `bbb'), since a null match
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For example, the regular expression
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.Ql b*
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matches the beginning of
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the string
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.Ql abbb
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(as opposed to the substring
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.Ql bbb ) ,
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since a null match
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is the only left-most match.
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.It \e{n,m\e} or \e{n,\e} or \e{n\e}
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Match the single character regular expression or subexpression
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@ -464,7 +509,8 @@ and returning the editor to command mode.
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The
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.Nm
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utility
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recognizes the following commands. The commands are shown together with
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recognizes the following commands.
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The commands are shown together with
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the default address or address range supplied if none is
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specified (in parenthesis).
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.Bl -tag -width indent
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@ -473,7 +519,8 @@ Append text to the buffer after the addressed line.
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Text is entered in input mode.
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The current address is set to last line entered.
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.It (.,.)c
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Change lines in the buffer. The addressed lines are deleted
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Change lines in the buffer.
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The addressed lines are deleted
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from the buffer, and text is appended in their place.
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Text is entered in input mode.
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The current address is set to last line entered.
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@ -489,7 +536,7 @@ Edit
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and sets the default filename.
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If
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.Ar file
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is not specified, then the default filename is used.
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is not specified, then the default filename is used.
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Any lines in the buffer are deleted before
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the new file is read.
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The current address is set to the last line read.
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@ -567,8 +614,11 @@ The format of
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.Ar command-list
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is the same as that of the
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.Em g
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command. A newline alone acts as a null command list.
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A single `&' repeats the last non-null command list.
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command.
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A newline alone acts as a null command list.
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A single
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.Ql &
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repeats the last non-null command list.
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.It H
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Toggle the printing of error explanations.
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By default, explanations are not printed.
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@ -581,23 +631,26 @@ Insert text in the buffer before the current line.
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Text is entered in input mode.
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The current address is set to the last line entered.
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.It (.,.+1)j
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Join the addressed lines. The addressed lines are
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Join the addressed lines.
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The addressed lines are
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deleted from the buffer and replaced by a single
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line containing their joined text.
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The current address is set to the resultant line.
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.It (.)klc
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Mark a line with a lower case letter
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.Em lc .
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The line can then be addressed as
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The line can then be addressed as
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.Em 'lc
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(i.e., a single quote followed by
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.Em lc )
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in subsequent commands. The mark is not cleared until the line is
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in subsequent commands.
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The mark is not cleared until the line is
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deleted or otherwise modified.
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.It (.,.)l
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Print the addressed lines unambiguously.
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If a single line fills for than one screen (as might be the case
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when viewing a binary file, for instance), a `--More--'
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when viewing a binary file, for instance), a
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.Dq Li --More--
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prompt is printed on the last line.
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The
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.Nm
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@ -606,7 +659,8 @@ before displaying the next screen.
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The current address is set to the last line
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printed.
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.It (.,.)m(.)
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Move lines in the buffer. The addressed lines are moved to after the
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Move lines in the buffer.
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The addressed lines are moved to after the
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right-hand destination address, which may be the address
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.Em 0
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(zero).
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@ -614,7 +668,8 @@ The current address is set to the
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last line moved.
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.It (.,.)n
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Print the addressed lines along with
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their line numbers. The current address is set to the last line
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their line numbers.
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The current address is set to the last line
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printed.
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.It (.,.)p
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Print the addressed lines.
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@ -639,10 +694,12 @@ except that unwritten changes are discarded without warning.
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.It ($)r Ar file
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Read
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.Ar file
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to after the addressed line. If
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to after the addressed line.
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If
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.Ar file
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is not specified, then the default
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filename is used. If there was no default filename prior to the command,
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filename is used.
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If there was no default filename prior to the command,
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then the default filename is set to
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.Ar file .
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Otherwise, the default filename is unchanged.
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@ -692,7 +749,9 @@ affected is printed as though the print suffix
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.Em p
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were specified.
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.Pp
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An unescaped `&' in
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An unescaped
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.Ql &
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in
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.Ar replacement
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is replaced by the currently matched text.
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The character sequence
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@ -704,7 +763,9 @@ is a number in the range [1,9], is replaced by the
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backreference expression of the matched text.
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If
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.Ar replacement
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consists of a single `%', then
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consists of a single
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.Ql % ,
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then
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.Ar replacement
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from the last substitution is used.
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Newlines may be embedded in
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@ -779,7 +840,8 @@ Any previous contents of
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is lost without warning.
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If there is no default filename, then the default filename is set to
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.Ar file ,
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otherwise it is unchanged. If no filename is specified, then the default
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otherwise it is unchanged.
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If no filename is specified, then the default
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filename is used.
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The current address is unchanged.
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.It (1,$)wq Ar file
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@ -804,15 +866,18 @@ command, expect that the previous contents of file is not clobbered.
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The current address is unchanged.
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.It x
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Prompt for an encryption key which is used in subsequent reads and
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writes. If a newline alone is entered as the key, then encryption is
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turned off. Otherwise, echoing is disabled while a key is read.
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writes.
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If a newline alone is entered as the key, then encryption is
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turned off.
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Otherwise, echoing is disabled while a key is read.
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Encryption/decryption is done using the
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.Xr bdes 1
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algorithm.
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.It Pf (.+1)z n
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Scroll
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.Ar n
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lines at a time starting at addressed line. If
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lines at a time starting at addressed line.
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If
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.Ar n
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is not specified, then the current window size is used.
|
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The current address is set to the last line printed.
|
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@ -823,7 +888,9 @@ via
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.Xr sh 1 .
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If the first character of
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.Ar command
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is `!', then it is replaced by text of the
|
||||
is
|
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.Ql \&! ,
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then it is replaced by text of the
|
||||
previous
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.Ar !command .
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The
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@ -834,7 +901,8 @@ for backslash (\\) escapes.
|
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However, an unescaped
|
||||
.Em %
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||||
is replaced by the default filename.
|
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When the shell returns from execution, a `!'
|
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When the shell returns from execution, a
|
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.Ql \&!
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is printed to the standard output.
|
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The current line is unchanged.
|
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.It ($)=
|
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@ -850,7 +918,7 @@ buffer file
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||||
.It ed.hup
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the file to which
|
||||
.Nm
|
||||
attempts to write the buffer if the terminal hangs up
|
||||
attempts to write the buffer if the terminal hangs up
|
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.El
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.Sh SEE ALSO
|
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.Xr bdes 1 ,
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@ -872,14 +940,15 @@ The
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.Nm
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utility processes
|
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.Ar file
|
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arguments for backslash escapes, i.e., in a filename,
|
||||
arguments for backslash escapes, i.e., in a filename,
|
||||
any characters preceded by a backslash (\\) are
|
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interpreted literally.
|
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.Pp
|
||||
If a text (non-binary) file is not terminated by a newline character,
|
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then
|
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.Nm
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appends one on reading/writing it. In the case of a binary file,
|
||||
appends one on reading/writing it.
|
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In the case of a binary file,
|
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.Nm
|
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does not append a newline on reading/writing.
|
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.Pp
|
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@ -887,7 +956,9 @@ per line overhead: 4 ints
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.Sh DIAGNOSTICS
|
||||
When an error occurs,
|
||||
.Nm
|
||||
prints a `?' and either returns to command mode
|
||||
prints a
|
||||
.Ql \&?
|
||||
and either returns to command mode
|
||||
or exits if its input is from a script.
|
||||
An explanation of the last error can be
|
||||
printed with the
|
||||
@ -896,7 +967,7 @@ printed with the
|
||||
.Pp
|
||||
Since the
|
||||
.Em g
|
||||
(global) command masks any errors from failed searches and substitutions,
|
||||
(global) command masks any errors from failed searches and substitutions,
|
||||
it can be used to perform conditional operations in scripts; e.g.,
|
||||
.Pp
|
||||
.Sm off
|
||||
|
||||
Loading…
Reference in New Issue
Block a user