allow clone & socketpair

src/bot.cpp

@@ -4,9 +4,12 @@
 using json = nlohmann::json;
 
 #include "replacefont.h"
+#include "rulefont.h"
 #include "phonefont.h"
 #include "vectorfont.h"
 
+#include <bitset> // covnert chars to int
+
 static const std::string fancyrepl[]   {"𝓪","𝓫","𝓬","𝓭","𝓮","𝓯","𝓰","𝓱","𝓲","𝓳","𝓴","𝓵","𝓶","𝓷","𝓸","𝓹","𝓺","𝓻","𝓼","𝓽","𝓾","𝓿","𝔀","𝔁","𝔂","𝔃","𝓐","𝓑","𝓒","𝓓","𝓔","𝓕","𝓖","𝓗","𝓘","𝓙","𝓚","𝓛","𝓜","𝓝","𝓞","𝓟","𝓠","𝓡","𝓢","𝓣","𝓤","𝓥","𝓦","𝓧","𝓨","𝓩"};
 static const std::string frakturrepl[] {"𝖆","𝖇","𝖈","𝖉","𝖊","𝖋","𝖌","𝖍","𝖎","𝖏","𝖐","𝖑","𝖒","𝖓","𝖔","𝖕","𝖖","𝖗","𝖘","𝖙","𝖚","𝖛","𝖜","𝖝","𝖞","𝖟","𝕬","𝕭","𝕮","𝕯","𝕰","𝕱","𝕲","𝕳","𝕴","𝕵","𝕶","𝕷","𝕸","𝕹","𝕺","𝕻","𝕼","𝕽","𝕾","𝕿","𝖀","𝖁","𝖂","𝖃","𝖄","𝖅"};
 static const std::string doublerepl[]  {"𝕒","𝕓","𝕔","𝕕","𝕖","𝕗","𝕘","𝕙","𝕚","𝕛","𝕜","𝕝","𝕞","𝕟","𝕠","𝕡","𝕢","𝕣","𝕤","𝕥","𝕦","𝕧","𝕨","𝕩","𝕪","𝕫","𝔸","𝔹","ℂ","𝔻","𝔼","𝔽","𝔾","ℍ","𝕀","𝕁","𝕂","𝕃","𝕄","ℕ","𝕆","ℙ","ℚ","ℝ","𝕊","𝕋","𝕌","𝕍","𝕎","𝕏","𝕐","ℤ"};
@@ -18,7 +21,7 @@ static const std::string ncirclerepl[] {"🅐", "🅑", "🅒", "🅓", "🅔",
 static const std::string nboxrepl[]    {"🅰", "🅱", "🅲", "🅳", "🅴", "🅵", "🅶", "🅷", "🅸", "🅹", "🅺", "🅻", "🅼", "🅽", "🅾", "🅿", "🆀", "🆁", "🆂", "🆃", "🆄", "🆅", "🆆", "🆇", "🆈", "🆉", "🅰", "🅱", "🅲", "🅳", "🅴", "🅵", "🅶", "🅷", "🅸", "🅹", "🅺", "🅻", "🅼", "🅽", "🅾", "🅿", "🆀", "🆁", "🆂", "🆃", "🆄", "🆅", "🆆", "🆇", "🆈", "🆉"};
 
 FontBot::FontBot() {
-	fonts.reserve(12);
+	fonts.reserve(13);
 	fonts.push_back(new ReplaceFont("Fancy",   fancyrepl));
 	fonts.push_back(new ReplaceFont("Fraktur", frakturrepl));
 	fonts.push_back(new ReplaceFont("Double",  doublerepl));
@@ -30,6 +33,7 @@ FontBot::FontBot() {
 	fonts.push_back(new ReplaceFont("Boxes", boxrepl));
 	fonts.push_back(new ReplaceFont("Negative Circles", ncirclerepl));
 	fonts.push_back(new ReplaceFont("Negative Boxes", nboxrepl));
+	fonts.push_back(new RuleFont("Binary", [](char c){ return std::bitset<8>((int) c).to_string() + " "; }));
 }
 
 FontBot::~FontBot() {

src/main.cpp

@@ -79,6 +79,9 @@ static bool enableSecurity() {
 
 	seccomp_rule_add(scmp, SCMP_ACT_ALLOW, SCMP_SYS(restart_syscall), 0);
 	seccomp_rule_add(scmp, SCMP_ACT_ALLOW, SCMP_SYS(futex), 0);
+	seccomp_rule_add(scmp, SCMP_ACT_ALLOW, SCMP_SYS(socketpair), 0); // what?
+
+	seccomp_rule_add(scmp, SCMP_ACT_ALLOW, SCMP_SYS(clone), 0); // curl wants to spawn threads
 
 	//apply seccomp
 	int err = seccomp_load(scmp);

src/rulefont.cpp

@@ -0,0 +1,26 @@
+#include "rulefont.h"
+
+#include <exception>
+
+RuleFont::RuleFont(const std::string& name, ruleFunc rule) : name(name), rule(rule) {
+	if(!rule) {
+		throw std::exception(); // "invalid Rule"
+	}
+}
+
+void RuleFont::applyFont(const std::string& in, std::string& out) const {
+	out.reserve(in.size());
+	for(size_t pos = 0; pos < in.size(); ++pos) {
+		char c = in[pos];
+		std::string append = rule(c);
+		out += append;
+	}
+}
+
+const std::string& RuleFont::getName() const {
+	return name;
+}
+
+bool RuleFont::canApply(const std::string& in) const {
+	return true;
+}

src/rulefont.h

@@ -0,0 +1,17 @@
+#include "font.h"
+
+#include <functional>
+
+class RuleFont : public Font {
+public:
+	using ruleFunc = std::function<std::string(char)>;
+
+	RuleFont(const std::string& name, ruleFunc rule);
+
+	virtual void applyFont(const std::string& in, std::string& out) const override;
+	virtual const std::string& getName() const override;
+	virtual bool canApply(const std::string& in) const override;
+private:
+	ruleFunc rule;
+	std::string name;
+};