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IFS (even in AT&T ksh93) are octets, so 'IFS=…' isn’t possible atm

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tg 2009-11-22 14:23:21 +00:00
parent 09b96b8fc7
commit 22ff50fe55
1 changed files with 12 additions and 16 deletions
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mksh.1
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@ -1,4 +1,4 @@
.\" $MirOS: src/bin/mksh/mksh.1,v 1.198 2009/11/21 23:23:18 tg Exp $
.\" $MirOS: src/bin/mksh/mksh.1,v 1.199 2009/11/22 14:23:21 tg Exp $
.\" $OpenBSD: ksh.1,v 1.129 2009/05/28 06:09:06 jmc Exp $
.\"-
.\" Copyright © 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
@ -71,7 +71,7 @@
.\" with -mandoc, it might implement .Mx itself, but we want to
.\" use our own definition. And .Dd must come *first*, always.
.\"
.Dd $Mdocdate: November 21 2009 $
.Dd $Mdocdate: November 22 2009 $
.\"
.\" Check which macro package we use
.\"
@ -769,7 +769,7 @@ is set to what was read (leading/trailing space is stripped), and
is executed.
If a blank line (i.e. zero or more
.Ev IFS
characters) is entered, the menu is reprinted without executing
octets) is entered, the menu is reprinted without executing
.Ar list .
.Pp
When
@ -1142,18 +1142,17 @@ the current value of the
parameter.
The
.Ev IFS
parameter specifies a list of characters which are used to break a string up
into several words; any characters from the set space, tab, and newline that
parameter specifies a list of octets which are used to break a string up
into several words; any octets from the set space, tab, and newline that
appear in the
.Ev IFS
characters are called
octets are called
.Dq IFS whitespace .
Sequences of one or more
.Ev IFS
whitespace characters, in combination with zero or one
whitespace octets, in combination with zero or one
.Pf non- Ev IFS
whitespace
characters, delimit a field.
whitespace octets, delimit a field.
As a special case, leading and trailing
.Ev IFS
whitespace and trailing
@ -3578,13 +3577,10 @@ If
.Ic read
is run in a loop such as
.Ic while read foo; do ...; done
then leading whitespace will be removed (IFS) and backslashes processed
.Pf ( Fl r ) .
then leading whitespace will be removed (IFS) and backslashes processed.
You might want to use
.Ic while IFS= read \-r foo; do ...; done
for pristine I/O (variable splitting, as in
.Ic while IFS= read foo bar; do ...; done
is not possible though).
for pristine I/O.
.Pp
The inner loop will be executed in a subshell and variable changes
cannot be propagated if executed in a pipeline:
@ -4187,7 +4183,7 @@ is
.Dv NULL
or unset, if it has embedded spaces (i.e.\&
.Ev IFS
characters), or if it is a unary operator like
octets), or if it is a unary operator like
.Sq \&!
or
.Sq Fl n .
@ -4876,7 +4872,7 @@ respectively.
The line is scrolled horizontally as necessary.
.Pp
Completed lines are pushed into the history, unless they begin with an
IFS character or IFS white space, or are the same as the previous line.
IFS octet or IFS white space, or are the same as the previous line.
.Ss Emacs editing mode
When the
.Ic emacs