Fix and improve mark up.
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joerg
parent
9fca5da616
commit
cf421e9ff2
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@ -1,4 +1,4 @@
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.\" $NetBSD: awk.1,v 1.18 2009/03/09 14:10:12 joerg Exp $
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.\" $NetBSD: awk.1,v 1.19 2009/03/15 16:21:46 joerg Exp $
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.\"
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.\" Copyright (C) Lucent Technologies 1997
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.\" All Rights Reserved
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@ -129,9 +129,9 @@ If
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is null, the input line is split into one field per character.
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.Pp
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A pattern-action statement has the form
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.sp
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.Lp
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.Dl pattern \&{ action \&}
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.sp
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.Lp
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A missing \&{ action \&}
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means print the line;
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a missing pattern always matches.
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@ -144,7 +144,8 @@ An empty
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.Ar expression-list
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stands for
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.Va $0 .
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String constants are quoted \&\f(CW"\ "\fR,
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String constants are quoted
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.Em \&"\ \&" ,
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with the usual C escapes recognized within.
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Expressions take on string or numeric values as appropriate,
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and are built using the
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@ -203,7 +204,7 @@ Logical OR
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.It Ic ?:
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C conditional expression.
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This is used as
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.Ar expr1 Ic ? Ar expr2 Ic : Ar expr3 No .
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.Ar expr1 Ic \&? Ar expr2 Ic \&: Ar expr3 No .
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If
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.Ar expr1
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is true, the result value is
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@ -223,25 +224,12 @@ Assignment and Operator-Assignment
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The control statements are as follows:
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.Pp
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.Bl -hang -offset indent -width indent -compact
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.It Xo
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.Ic if \&( Ar expression Ic \&) Ar statement
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.Bq Ic else Ar statement
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.Xc
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.It Ic while( Ar expression Ic \&) Ar statement
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.It Xo
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.Ic for( Ar expression Ic \&; Ar expression Ic \&;
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.Ar expression Ic \&)
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.Ar statement
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.Xc
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.It Xo
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.Ic for( Va var Ic in Ar array
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.Ic \&)
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.Ar statement
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.Xc
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.It Xo
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.Ic do Ar statement
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.Ic while( Ar expression Ic \&)
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.Xc
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.It Ic if \&( Ar expression Ic \&) Ar statement Bq Ic else Ar statement
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.It Ic while \&( Ar expression Ic \&) Ar statement
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.It Ic for \&( Ar expression Ic \&; Ar expression Ic \&; \
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Ar expression Ic \&) Ar statement
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.It Ic for \&( Va var Ic in Ar array Ic \&) Ar statement
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.It Ic do Ar statement Ic while \&( Ar expression Ic \&)
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.It Ic break
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.It Ic continue
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.It Ic delete Va array Bq Ar expression
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@ -249,7 +237,7 @@ The control statements are as follows:
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.It Ic exit Bq Ar expression
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.Ar expression
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.It Ic return Bq Ar expression
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.It Ic { Ar [ statement ... ] Ic }
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.It Ic \&{ Ar [ statement ... ] Ic \&}
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.El
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.Ss I/O Statements
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The input/output statements are as follows:
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@ -274,12 +262,7 @@ to the next input record from the current input file.
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.Ic getline
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returns 1 for a successful input,
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0 for end of file, and \-1 for an error.
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.It Xo
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.Ic getline
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.Bq Va var
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.Ic \*[Lt]
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.Ar file
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.Xc
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.It Ic getline Bo Va var Bc Ic \*[Lt] Ar file
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Set
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.Va var
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(or
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@ -301,11 +284,7 @@ returns the next line of output from
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Skip remaining patterns on this input line.
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.It Ic nextfile
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Skip rest of this file, open next, start at top.
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.It Xo
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.Ic print
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.Bq Ar expr-list
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.Bq Ic \*[Gt] Ar file
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.Xc
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.It Ic print Bo Ar expr-list Bc Bq Ic \*[Gt] Ar file
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The
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.Ic print
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statement prints its arguments on the standard output (or to a file
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@ -325,12 +304,7 @@ and
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.Ar expr
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may be literal names or parenthesized expressions; identical string values in
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different statements denote the same open file.
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.It Xo
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.Ic printf
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.Ar format
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.Bq Ic , Ar expr-list
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.Bq Ic \*[Gt] Ar file
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.Xc
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.It Ic printf Ar format Bo Ic \&, Ar expr-list Bc Bq Ic \*[Gt] Ar file
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Format and print its expression list according to
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.Ar format .
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See
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@ -701,7 +675,7 @@ the function definition.
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.It Ic length($0) \*[Gt] 72
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Print lines longer than 72 characters.
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.Pp
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.It Ic { print $2, $1 }
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.It Ic \&{ print $2, $1 \&}
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Print first two fields in opposite order.
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.Pp
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.It Ic BEGIN { FS = \&",[ \et]*|[ \et]+\&" }
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@ -709,9 +683,7 @@ Print first two fields in opposite order.
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Same, with input fields separated by comma and/or blanks and tabs.
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.Pp
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.It Ic "\ \ \ \ {" s += $1 }
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.It Xo
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.Ic END { print \&"sum is\&", s, \&" average is\ \&",\ s/NR\ }
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.Xc
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.It Ic END { print \&"sum is\&", s, \&" average is\ \&",\ s/NR\ }
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Add up first column, print sum and average.
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.Pp
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.It Ic /start/, /stop/
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@ -755,6 +727,6 @@ There are no explicit conversions between numbers and strings.
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To force an expression to be treated as a number add 0 to it;
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to force it to be treated as a string concatenate
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\&"\&" to it.
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.br
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.Pp
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The scope rules for variables in functions are a botch;
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the syntax is worse.
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