The backward compatibility code for <termio.h> has been removed starting
from GLIBC 2.42. So it starts to fail on some bleeding edge distributions
like openSUSE Tumbleweed. We took back the code removed from the GLIBC
and put it back inside txInput.c.
generally unused, as it is incompatible with the Tcl/Tk build of
magic. However, I had not intended to remove it, only move the
name from "readline-4.3" to "readline". But "readline/readline"
was in .gitignore, which caused the contents to be removed from
the repository. This commit restores those files, and also
prevents the readline directory Makefile from making a symbolic
link called "readline" to itself, which was causing compile-time
issues. The readline code is only kept for backwards compatibility
with ancient versions of magic not using the Tcl/Tk interpreter.
This seems like it has 2 use cases.
Internal console management around reprinting command prompt, but many
modes of operation delegate the prompt processing to tkcon or readline.
Process termination to restore the termios.
This function is related to libreadline rl_pre_input_hook callback
which is invoked as (not making use of any function return value):
readline.c: (*rl_pre_input_hook) ();
The general prototype for this function is:
rltypedefs.h:typedef int rl_hook_func_t PARAMS((void));
So the resolution is to provide a known value as the return value, which
resolves the concern.
SonarCloud
textio/txInput.c:550 non-void function does not return a value
https://sonarcloud.io/project/issues?open=AZJB17NwNGfDNup0Rj5G&id=dlmiles_magic
Jean-Paul Chaput
Darryl L. Miles
Tim Edwards
Johan Euphrosine
Alessandro De Laurenzis
Brad Smith