git: sh: Add $'quoting' (C-style escape sequences).
commit e1489450c38a053dad66768fc12706aa2968f646
Author: Peter Avalos <pavalos@dragonflybsd.org>
Date: Sat Jul 2 14:29:49 2011 -1000
sh: Add $'quoting' (C-style escape sequences).
A string between $' and ' may contain backslash escape sequences similar
to the ones in a C string constant (except that a single-quote must be
escaped and a double-quote need not be). Details are in the sh(1) man
page.
This construct is useful to include unprintable characters, tabs and
newlines in strings; while this can be done with a command substitution
containing a printf command, that needs ugly workarounds if the result
is to end with a newline as command substitution removes all trailing
newlines.
The construct may also be useful in future to describe unprintable
characters without needing to write those characters themselves in 'set
-x', 'export -p' and the like.
The implementation attempts to comply to the proposal for the next issue
of the POSIX specification. Because this construct is not in
POSIX.1-2008, using it in scripts intended to be portable is unwise.
Matching the minimal locale support in the rest of sh, the \u and \U
sequences are currently not useful.
Obtained-from: FreeBSD SVN rev 221513
Summary of changes:
bin/sh/mksyntax.c | 4 +-
bin/sh/parser.c | 147 ++++++++++++++++++++++-
bin/sh/sh.1 | 75 ++++++++++++-
tools/regression/bin/sh/parser/dollar-quote1.0 | 12 ++
tools/regression/bin/sh/parser/dollar-quote2.0 | 5 +
tools/regression/bin/sh/parser/dollar-quote3.0 | 22 ++++
tools/regression/bin/sh/parser/dollar-quote4.0 | 19 +++
tools/regression/bin/sh/parser/dollar-quote5.0 | 12 ++
tools/regression/bin/sh/parser/dollar-quote6.0 | 5 +
tools/regression/bin/sh/parser/dollar-quote7.0 | 6 +
tools/regression/bin/sh/parser/dollar-quote8.0 | 11 ++
tools/regression/bin/sh/parser/dollar-quote9.0 | 8 ++
12 files changed, 315 insertions(+), 11 deletions(-)
create mode 100644 tools/regression/bin/sh/parser/dollar-quote1.0
create mode 100644 tools/regression/bin/sh/parser/dollar-quote2.0
create mode 100644 tools/regression/bin/sh/parser/dollar-quote3.0
create mode 100644 tools/regression/bin/sh/parser/dollar-quote4.0
create mode 100644 tools/regression/bin/sh/parser/dollar-quote5.0
create mode 100644 tools/regression/bin/sh/parser/dollar-quote6.0
create mode 100644 tools/regression/bin/sh/parser/dollar-quote7.0
create mode 100644 tools/regression/bin/sh/parser/dollar-quote8.0
create mode 100644 tools/regression/bin/sh/parser/dollar-quote9.0
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/e1489450c38a053dad66768fc12706aa2968f646
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