Can someone write the -e and -E diff for echo like I suggest please?

Theo de Raadt <deraadt@openbsd.org> wrote:

> https://pubs.opengroup.org/onlinepubs/9799919799/
> 
> I think we should be adding the -e and -E stuff to echo
> 
> That still cannot use getopt, it must manually look at argv[1]
> for - followed by a series of e, E, and n, then apply it.  If the
> pattern isn't precisely -[eEn]* it should print it as if it
> wasn't this special argument.
> 
> 
> joshua stein <jcs@jcs.org> wrote:
> 
> > I was trying to use the driverless thing in CUPS to be able to add 
> > AirPrint printers on my network but 'driverless list' would never 
> > show any printers even with Avahi running.
> > 
> > Turns out the driverless binary is shelling out to ippfind and 
> > passing a long string of args to act as a filter, and that filter 
> > depends on echo having an -e flag to print in a format that 
> > driverless reads back.  Since we don't have -e, it was just reading 
> > back garbage.
> > 
> >     ippfind -T 0 _ipps._tcp _ipp._tcp ! --txt printer-type --and \( --txt-pdl image/pwg-raster --or --txt-pdl application/PCLm --or --txt-pdl image/urf --or --txt-pdl application/pdf \) -x echo -en '\n{service_scheme}\t{service_name}\t{service_domain}\t{txt_usb_MFG}\t{txt_usb_MDL}\t{txt_product}\t{txt_ty}\t{service_name}\t{txt_pdl}\t{txt_UUID}\t{txt_rfo}\t' \; --local -x echo -en L \;
> > 
> > The easiest solution seemed to be to depend on gecho from coreutils 
> > but maybe there's a shorter path.
> > 
> > 
> > diff --git print/cups-filters/Makefile print/cups-filters/Makefile
> > index c34782cf7e5..9ec9dfb9e60 100644
> > --- print/cups-filters/Makefile
> > +++ print/cups-filters/Makefile
> > @@ -2,7 +2,7 @@ COMMENT=		OpenPrinting CUPS filters
> >  
> >  V=			2.0.1
> >  DISTNAME=		cups-filters-${V}
> > -REVISION=		0
> > +REVISION=		1
> >  
> >  CATEGORIES=		print
> >  
> > @@ -32,7 +32,8 @@ LIB_DEPENDS=		print/libcupsfilters \
> >  
> >  # make it easier for users: bring in foomatic-db and allow the
> >  # regeneration of PPD files from share/foomatic/db/source/*/*.xml
> > -RUN_DEPENDS +=		print/foomatic-db-engine
> > +RUN_DEPENDS +=		print/foomatic-db-engine \
> > +			sysutils/coreutils
> >  
> >  FAKE_FLAGS=		pkgfontconfigdir=${PREFIX}/share/examples/cups-filters \
> >  			pkgcupsserverrootdir=${PREFIX}/share/examples/cups-filters/cups
> > diff --git print/cups-filters/patches/patch-utils_driverless_c print/cups-filters/patches/patch-utils_driverless_c
> > new file mode 100644
> > index 00000000000..e234226fbec
> > --- /dev/null
> > +++ print/cups-filters/patches/patch-utils_driverless_c
> > @@ -0,0 +1,26 @@
> > +--- utils/driverless.c.orig	Sun Feb 15 21:03:40 2026
> > ++++ utils/driverless.c	Sun Feb 15 21:04:25 2026
> > +@@ -419,7 +419,11 @@
> > +   ippfind_argv[i++] = "application/pdf";  /* PDF */
> > +   ippfind_argv[i++] = ")";
> > +   ippfind_argv[i++] = "-x";
> > ++#ifdef __OpenBSD__
> > ++  ippfind_argv[i++] = "gecho";            /* Output the needed data fields */
> > ++#else
> > +   ippfind_argv[i++] = "echo";             /* Output the needed data fields */
> > ++#endif
> > +   ippfind_argv[i++] = "-en";              /* separated by tab characters */
> > +   if (mode < 0) {
> > +     if (isFax)
> > +@@ -440,7 +444,11 @@
> > +   if (mode < 0) {
> > +     ippfind_argv[i++] = "--local";        /* Rest only if local service */
> > +     ippfind_argv[i++] = "-x";
> > ++#ifdef __OpenBSD__
> > ++    ippfind_argv[i++] = "gecho";          /* Output an 'L' at the end of the */
> > ++#else
> > +     ippfind_argv[i++] = "echo";           /* Output an 'L' at the end of the */
> > ++#endif
> > +     ippfind_argv[i++] = "-en";            /* line */
> > +     ippfind_argv[i++] = "L";
> > +     ippfind_argv[i++] = ";";
> >