/* harness for embedding Perl into C
   modified by Bliako
    from https://perldoc.perl.org/perlembed.html
   Compile:
    $(perl -MConfig -e 'print $Config{cc}') perl_embed_argv_signal.c $(perl -MExtUtils::Embed -e ccopts -e ldopts) -o perl_embed_argv_signal
   30/01/2019
*/
#include <stdio.h>
#include <signal.h>
#include <EXTERN.h>	/* from the Perl distribution     */
#include <perl.h>	/* from the Perl distribution     */
 
static PerlInterpreter *my_perl;  /***    The Perl interpreter    ***/

void cleanup(void);
//let perl handle it
void signal_handler(int signum){ printf("got signal %d\n", signum); }

int main(int argc, char **argv, char **env){
	signal(SIGINT, signal_handler);
	PERL_SYS_INIT3(&argc,&argv,&env);
	my_perl = perl_alloc();
	printf("%s : perl_alloc()\n", argv[0]);
	perl_construct(my_perl);
	printf("%s : perl_construct()\n", argv[0]);
	PL_exit_flags |= PERL_EXIT_DESTRUCT_END;

	char** perlargv = malloc( (argc+3) * sizeof(char*) );
	perlargv[0] = "perl";
	perlargv[1] = "-e";
	perlargv[2] = "1";
	perlargv[3] = "--";

	int i = argc-1;
	while (i--) perlargv[i+4] = argv[i+1];

	perl_parse(my_perl, NULL, argc+3, perlargv, NULL);

	const char perlcode[] =
"#$SIG{INT} = sub { print \"Caught your ctrl-c and exiting!\\n\"; exit(0); };\n"
"$SIG{INT} = sub { print \"Caught your ctrl-c but ignoring it!\\n\" };\n"
"print \"$0: ARGV:\"; print ' '.$_ foreach(@ARGV); print \"\\n\";\n"
"print \"my pid $$\\n\";\n"
"print \"now sleeping, and you ctrl-c me\\n\";\n"
"for(1..100){sleep(1);print\"$_\\n\";}\n"
;
	printf("%s : executing :\n%s\n", argv[0], perlcode);
	SV *ret = eval_pv(perlcode, FALSE);
	if( SvTRUE(ERRSV) ){ fprintf(stderr, "%s : eval_sv() has failed with:\n%s\nfor the code:\n%s\n", argv[0], SvPVx_nolen(ERRSV), perlcode); cleanup(); exit(1); }

	printf("%s : done.\n", argv[0]);
	exit(EXIT_SUCCESS);
}
void cleanup(void){
	perl_destruct(my_perl);
	perl_free(my_perl);
	PERL_SYS_TERM();
}