mirror of
https://github.com/EQEmu/Server.git
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333 lines
8.2 KiB
C++
333 lines
8.2 KiB
C++
/*
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embperl.cpp
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---------------
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wraps a perl interpreter for use in eqemu
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Eglin
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*/
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#ifndef EMBPERL_CPP
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#define EMBPERL_CPP
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#ifdef EMBPERL
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#include "../common/global_define.h"
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#include "../common/eqemu_logsys.h"
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#include <cstdio>
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#include <cstdarg>
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#include <vector>
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#include "embperl.h"
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#include "embxs.h"
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#include "../common/features.h"
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#include "../common/path_manager.h"
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#include "../common/process/process.h"
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#include "../common/file.h"
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#include "../common/timer.h"
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#ifndef GvCV_set
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#define GvCV_set(gv,cv) (GvCV(gv) = (cv))
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#endif
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#ifdef EMBPERL_IO_CAPTURE
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XS(XS_EQEmuIO_PRINT);
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#endif //EMBPERL_IO_CAPTURE
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const char *argv_eqemu[] = { "",
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#ifdef EMBPERL_IO_CAPTURE
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"-w", "-W",
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#endif
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"-e", "0;", nullptr };
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#ifdef EMBPERL_IO_CAPTURE
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int argc = 5;
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#else
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int argc = 3;
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#endif
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//so embedded scripts can use xs extensions (ala 'use socket;')
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EXTERN_C void boot_DynaLoader(pTHX_ CV* cv);
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EXTERN_C void xs_init(pTHX)
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{
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char file[256];
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strncpy(file, __FILE__, 256);
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file[255] = '\0';
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char buf[128]; //shouldent have any function names longer than this.
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//add the strcpy stuff to get rid of const warnings....
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newXS(strcpy(buf, "DynaLoader::boot_DynaLoader"), boot_DynaLoader, file);
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#ifdef EMBPERL_IO_CAPTURE
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newXS(strcpy(buf, "EQEmuIO::PRINT"), XS_EQEmuIO_PRINT, file);
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#endif
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}
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Embperl::Embperl()
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{
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char **argv = (char **)argv_eqemu;
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char **env = { nullptr };
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in_use = true; //in case one of these files generates an event
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PERL_SYS_INIT3(&argc, &argv, &env);
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DoInit();
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}
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void Embperl::DoInit() {
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char **argv = (char **)argv_eqemu;
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char **env = { nullptr };
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my_perl = perl_alloc();
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//setup perl...
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if(!my_perl)
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throw "Failed to init Perl (perl_alloc)";
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PERL_SET_CONTEXT(my_perl);
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PERL_SET_INTERP(my_perl);
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PL_perl_destruct_level = 1;
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perl_construct(my_perl);
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perl_parse(my_perl, xs_init, argc, argv, nullptr);
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perl_run(my_perl);
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//a little routine we use a lot.
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eval_pv("sub my_eval { eval $_[0];}", TRUE); //dies on error
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//ruin the perl exit and command:
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eval_pv("sub my_exit {}",TRUE);
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eval_pv("sub my_sleep {}",TRUE);
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if(gv_stashpv("CORE::GLOBAL", FALSE)) {
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GV *exitgp = gv_fetchpv("CORE::GLOBAL::exit", TRUE, SVt_PVCV);
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GvCV_set(exitgp, perl_get_cv("my_exit", TRUE)); //dies on error
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GvIMPORTED_CV_on(exitgp);
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GV *sleepgp = gv_fetchpv("CORE::GLOBAL::sleep", TRUE, SVt_PVCV);
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GvCV_set(sleepgp, perl_get_cv("my_sleep", TRUE)); //dies on error
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GvIMPORTED_CV_on(sleepgp);
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}
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//declare our file eval routine.
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try {
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init_eval_file();
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}
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catch(std::string e)
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{
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//remember... lasterr() is no good if we crap out here, in construction
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LogQuests("Perl Error [{}]", e);
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throw "failed to install eval_file hook";
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}
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#ifdef EMBPERL_IO_CAPTURE
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LogQuests("Tying perl output to eqemu logs");
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//make a tieable class to capture IO and pass it into EQEMuLog
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eval_pv(
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"package EQEmuIO; "
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"sub TIEHANDLE { my $me = bless {}, $_[0]; $me->PRINT('Creating '. $me); return($me); } "
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"sub WRITE { } "
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//dunno why I need to shift off fmt here, but it dosent like without it
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"sub PRINTF { my $me = shift; my $fmt = shift; $me->PRINT(sprintf($fmt, @_)); } "
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"sub CLOSE { my $me = shift; $me->PRINT('Closing '.$me); } "
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"sub DESTROY { my $me = shift; $me->PRINT('Destroying '.$me); } "
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//this ties us for all packages, just do it in quest since thats kinda 'our' package
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"package quest;"
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" if(tied *STDOUT) { untie(*STDOUT); }"
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" if(tied *STDERR) { untie(*STDERR); }"
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" tie *STDOUT, 'EQEmuIO';"
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" tie *STDERR, 'EQEmuIO';"
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,FALSE);
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#endif //EMBPERL_IO_CAPTURE
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#ifdef EMBPERL_PLUGIN
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eval_pv(
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"package plugin; "
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,FALSE
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);
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LogQuests("Loading perlemb plugins");
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try
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{
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std::string perl_command;
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perl_command = "main::eval_file('plugin', '" + Config->PluginPlFile + "');";
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eval_pv(perl_command.c_str(), FALSE);
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}
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catch(std::string e)
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{
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LogQuests("Warning [{}]: [{}]", Config->PluginPlFile, e);
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}
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try
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{
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//should probably read the directory in c, instead, so that
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//I can echo filenames as I do it, but c'mon... I'm lazy and this 1 line reads in all the plugins
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std::string perl_command =
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"if(opendir(D,'" + path.GetPluginsPath() +"')) { "
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" my @d = readdir(D);"
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" closedir(D);"
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" foreach(@d){ "
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" main::eval_file('plugin','" + path.GetPluginsPath() + "/'.$_)if/\\.pl$/;"
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" }"
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"}";
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eval_pv(perl_command.c_str(),FALSE);
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}
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catch(std::string e)
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{
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LogQuests("Warning [{}]", e);
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}
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#endif //EMBPERL_PLUGIN
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in_use = false;
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}
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Embperl::~Embperl()
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{
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in_use = true;
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#ifdef EMBPERL_IO_CAPTURE
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eval_pv(
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"package quest;"
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" if(tied *STDOUT) { untie(*STDOUT); }"
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" if(tied *STDERR) { untie(*STDERR); }"
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,FALSE);
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#endif
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PL_perl_destruct_level = 1;
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perl_destruct(my_perl);
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perl_free(my_perl);
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PERL_SYS_TERM();
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my_perl = NULL;
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}
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void Embperl::Reinit() {
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in_use = true;
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PERL_SET_CONTEXT(my_perl);
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PERL_SET_INTERP(my_perl);
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PL_perl_destruct_level = 1;
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perl_destruct(my_perl);
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perl_free(my_perl);
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my_perl = NULL;
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//Now reinit...
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DoInit();
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in_use = false;
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}
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void Embperl::init_eval_file(void)
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{
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eval_pv(
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"our %Cache;"
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"no warnings 'all';"
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"use Symbol qw(delete_package);"
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"sub eval_file {"
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"my($package, $filename) = @_;"
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"$filename=~s/\'//g;"
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"if(! -r $filename) { print \"Unable to read perl file '$filename'\\n\"; return; }"
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"my $mtime = -M $filename;"
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"if(defined $Cache{$package}{mtime}&&$Cache{$package}{mtime} <= $mtime && !($package eq 'plugin')){"
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" return;"
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"} else {"
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// we 'my' $filename,$mtime,$package,$sub to prevent them from changing our state up here.
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" eval(\"package $package; my(\\$filename,\\$mtime,\\$package,\\$sub); \\$isloaded = 1; require './$filename'; \");"
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// " print $@ if $@;"
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/* "local *FH;open FH, $filename or die \"open '$filename' $!\";"
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"local($/) = undef;my $sub = <FH>;close FH;"
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"my $eval = qq{package $package; sub handler { $sub; }};"
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"{ my($filename,$mtime,$package,$sub); eval $eval; }"
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"die $@ if $@;"
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"$Cache{$package}{mtime} = $mtime; ${$package.'::isloaded'} = 1;}"
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*/
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"}"
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"}"
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,FALSE);
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}
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int Embperl::eval_file(const char * packagename, const char * filename)
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{
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std::vector<std::string> args;
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args.push_back(packagename);
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args.push_back(filename);
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return dosub("main::eval_file", &args);
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}
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int Embperl::dosub(const char * subname, const std::vector<std::string> * args, int mode)
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{
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dSP;
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int ret_value = 0;
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int count;
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std::string error;
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ENTER;
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SAVETMPS;
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PUSHMARK(SP);
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if (args && !args->empty()) {
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for (auto i = args->begin(); i != args->end(); ++i) {
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XPUSHs(sv_2mortal(newSVpv(i->c_str(), i->length())));
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}
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}
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PUTBACK;
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count = call_pv(subname, mode);
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SPAGAIN;
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if (SvTRUE(ERRSV)) {
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error = SvPV_nolen(ERRSV);
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POPs;
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}
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else {
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if (count == 1) {
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SV *ret = POPs;
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if (SvTYPE(ret) == SVt_IV) {
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IV v = SvIV(ret);
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ret_value = v;
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}
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PUTBACK;
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}
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}
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FREETMPS;
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LEAVE;
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// not sure why we pass this as blind args, strange
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// check for syntax errors
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if (args && !args->empty()) {
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const std::string &filename = args->back();
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std::string sub = subname;
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if (sub == "main::eval_file" && !filename.empty() && File::Exists(filename)) {
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BenchTimer benchmark;
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std::string syntax_error = Process::execute(
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fmt::format("perl -c {} 2>&1", filename)
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);
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LogQuests("Perl eval [{}] took [{}]", filename, benchmark.elapsed());
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syntax_error = Strings::Trim(syntax_error);
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if (!Strings::Contains(syntax_error, "syntax OK")) {
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syntax_error += SvPVX(ERRSV);
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throw syntax_error;
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}
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}
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}
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if (error.length() > 0) {
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std::string errmsg = "Perl runtime error: ";
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errmsg += SvPVX(ERRSV);
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throw errmsg;
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}
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return ret_value;
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}
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//evaluate an expression. throw error on fail
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int Embperl::eval(const char * code)
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{
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std::vector<std::string> arg;
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arg.push_back(code);
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return dosub("main::my_eval", &arg, G_SCALAR|G_EVAL|G_KEEPERR);
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}
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bool Embperl::SubExists(const char *package, const char *sub) {
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HV *stash = gv_stashpv(package, false);
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if(!stash)
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return(false);
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int len = strlen(sub);
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return(hv_exists(stash, sub, len));
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}
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bool Embperl::VarExists(const char *package, const char *var) {
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HV *stash = gv_stashpv(package, false);
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if(!stash)
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return(false);
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int len = strlen(var);
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return(hv_exists(stash, var, len));
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}
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#endif //EMBPERL
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#endif //EMBPERL_CPP
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