On 5 October 2013 23:41, Gabriel Kerneis <gabr...@kerneis.info> wrote: > Escape single quotes and newlines when writing configure arguments > to config-host.mak. This is necessary to allow correct regeneration > by re-executing configure in a shell when config-host.mak becomes > out-of-date. > > Signed-off-by: Gabriel Kerneis <gabr...@kerneis.info> > --- > configure | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/configure b/configure > index 23dbaaf..fba7c1f 100755 > --- a/configure > +++ b/configure > @@ -3769,7 +3769,11 @@ echo "# Automatically generated by configure - do not > modify" >config-all-disas. > > echo "# Automatically generated by configure - do not modify" > > $config_host_mak > printf "# Configured with:" >> $config_host_mak > -printf " '%s'" "$0" "$@" >> $config_host_mak > +for arg in "$0" "$@"; do > + # join each arg on a single line, escaping newlines and single quotes > + quoted_arg=$(echo "$arg" | sed ":a;N;s/\n/\\\\n/;ba" | sed "s/'/'\\\\''/g")
So this sed script appears to convert literal newlines in the input into backslash-n: mnementh$ foo='hello > world' mnementh$ quoted_arg=$(echo "$foo" | sed ":a;N;s/\n/\\\\n/;ba" | sed "s/'/'\\\\''/g") mnementh$ printf " '%s'" "$quoted_arg" 'hello\nworld' Is that what's intended? It doesn't seem very useful because if you cut-n-paste (or pipe) 'hello\nworld' into a shell you get an actual backslash-n, not a newline. thanks -- PMM
