X-Git-Url: https://git.saurik.com/cycript.git/blobdiff_plain/5ef46cc08dc8723b3155ab1bec4e453293f2bcc9..7e5391fd937dd287b3aef363e641f2d3abc5f422:/Console.cpp

diff --git a/Console.cpp b/Console.cpp
index 7f97963..4a27c64 100644
--- a/Console.cpp
+++ b/Console.cpp
@@ -1,4 +1,4 @@
-/* Cycript - Remove Execution Server and Disassembler
+/* Cycript - Inlining/Optimizing JavaScript Compiler
  * Copyright (C) 2009  Jay Freeman (saurik)
 */
 
@@ -39,13 +39,26 @@
 
 #include "cycript.hpp"
 
+#ifdef CY_EXECUTE
+#include "JavaScript.hpp"
+#endif
+
 #include <cstdio>
 #include <sstream>
 
 #include <setjmp.h>
 
+#ifdef HAVE_READLINE_H
+#include <readline.h>
+#else
 #include <readline/readline.h>
+#endif
+
+#ifdef HAVE_HISTORY_H
+#include <history.h>
+#else
 #include <readline/history.h>
+#endif
 
 #include <sys/mman.h>
 
@@ -62,9 +75,14 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <sys/un.h>
+#include <pwd.h>
 
 #include <apr_getopt.h>
 
+#include <dlfcn.h>
+
+#include "Replace.hpp"
+
 static volatile enum {
     Working,
     Parsing,
@@ -105,21 +123,20 @@ void Setup(CYDriver &driver, cy::parser &parser) {
         driver.strict_ = true;
 }
 
-void Setup(CYOutput &out, CYDriver &driver) {
+void Setup(CYOutput &out, CYDriver &driver, CYOptions &options) {
     out.pretty_ = pretty_;
-
-    CYContext context(driver.pool_);
+    CYContext context(driver.pool_, options);
     driver.program_->Replace(context);
 }
 
-void Run(int socket, const char *data, size_t size, FILE *fout = NULL, bool expand = false) {
-    CYPool pool;
-
+static CYUTF8String Run(CYPool &pool, int client, CYUTF8String code) {
     const char *json;
-    if (socket == -1) {
+    size_t size;
+
+    if (client == -1) {
         mode_ = Running;
 #ifdef CY_EXECUTE
-        json = CYExecute(pool, data);
+        json = CYExecute(pool, code.data);
 #else
         json = NULL;
 #endif
@@ -128,28 +145,42 @@ void Run(int socket, const char *data, size_t size, FILE *fout = NULL, bool expa
             size = strlen(json);
     } else {
         mode_ = Sending;
-        CYSendAll(socket, &size, sizeof(size));
-        CYSendAll(socket, data, size);
+        CYSendAll(client, &size, sizeof(size));
+        CYSendAll(client, code.data, size);
         mode_ = Waiting;
-        CYRecvAll(socket, &size, sizeof(size));
+        CYRecvAll(client, &size, sizeof(size));
         if (size == _not(size_t))
             json = NULL;
         else {
             char *temp(new(pool) char[size + 1]);
-            CYRecvAll(socket, temp, size);
+            CYRecvAll(client, temp, size);
             temp[size] = '\0';
             json = temp;
         }
         mode_ = Working;
     }
 
-    if (json != NULL && fout != NULL) {
-        if (!expand || json[0] != '"' && json[0] != '\'')
-            fputs(json, fout);
+    return CYUTF8String(json, size);
+}
+
+static CYUTF8String Run(CYPool &pool, int client, const std::string &code) {
+    return Run(pool, client, CYUTF8String(code.c_str(), code.size()));
+}
+
+void Run(int client, const char *data, size_t size, FILE *fout = NULL, bool expand = false) {
+    CYPool pool;
+    CYUTF8String json(Run(pool, client, CYUTF8String(data, size)));
+
+    data = json.data;
+    size = json.size;
+
+    if (data != NULL && fout != NULL) {
+        if (!expand || data[0] != '"' && data[0] != '\'')
+            fputs(data, fout);
         else for (size_t i(0); i != size; ++i)
-            if (json[i] != '\\')
-                fputc(json[i], fout);
-            else switch(json[++i]) {
+            if (data[i] != '\\')
+                fputc(data[i], fout);
+            else switch(data[++i]) {
                 case '\0': goto done;
                 case '\\': fputc('\\', fout); break;
                 case '\'': fputc('\'', fout); break;
@@ -169,18 +200,199 @@ void Run(int socket, const char *data, size_t size, FILE *fout = NULL, bool expa
     }
 }
 
-void Run(int socket, std::string &code, FILE *fout = NULL, bool expand = false) {
-    Run(socket, code.c_str(), code.size(), fout, expand);
+static void Run(int client, std::string &code, FILE *fout = NULL, bool expand = false) {
+    Run(client, code.c_str(), code.size(), fout, expand);
+}
+
+int (*append_history$)(int, const char *);
+
+static std::string command_;
+
+static CYExpression *ParseExpression(CYPool &pool, CYUTF8String code) {
+    std::ostringstream str;
+    str << '(' << code << ')';
+    std::string string(str.str());
+
+    CYDriver driver(pool);
+    driver.data_ = string.c_str();
+    driver.size_ = string.size();
+
+    cy::parser parser(driver);
+    Setup(driver, parser);
+
+    if (parser.parse() != 0 || !driver.errors_.empty())
+        _assert(false);
+
+    CYExpress *express(dynamic_cast<CYExpress *>(driver.program_->statements_));
+    _assert(express != NULL);
+    return express->expression_;
+}
+
+static int client_;
+
+static char **Complete(const char *word, int start, int end) {
+    rl_attempted_completion_over = TRUE;
+
+    CYPool pool;
+
+    CYDriver driver(pool);
+    cy::parser parser(driver);
+    Setup(driver, parser);
+
+    std::string line(rl_line_buffer, start);
+    std::string command(command_ + line);
+
+    driver.data_ = command.c_str();
+    driver.size_ = command.size();
+
+    driver.auto_ = true;
+
+    if (parser.parse() != 0 || !driver.errors_.empty())
+        return NULL;
+
+    if (driver.mode_ == CYDriver::AutoNone)
+        return NULL;
+
+    CYExpression *expression;
+
+    CYOptions options;
+    CYContext context(driver.pool_, options);
+
+    std::ostringstream prefix;
+
+    switch (driver.mode_) {
+        case CYDriver::AutoPrimary:
+            expression = $ CYThis();
+        break;
+
+        case CYDriver::AutoDirect:
+            expression = driver.context_;
+        break;
+
+        case CYDriver::AutoIndirect:
+            expression = $ CYIndirect(driver.context_);
+        break;
+
+        case CYDriver::AutoMessage: {
+            CYDriver::Context &thing(driver.contexts_.back());
+            expression = $M($M($ CYIndirect(thing.context_), $S("isa")), $S("messages"));
+            for (CYDriver::Context::Words::const_iterator part(thing.words_.begin()); part != thing.words_.end(); ++part)
+                prefix << (*part)->word_ << ':';
+        } break;
+
+        default:
+            _assert(false);
+    }
+
+    std::string begin(prefix.str() + word);
+
+    driver.program_ = $ CYProgram($ CYExpress($C2(ParseExpression(pool,
+    "   function(object, prefix) {\n"
+    "       var names = [];\n"
+    "       var pattern = '^' + prefix;\n"
+    "       for (name in object)\n"
+    "           if (name.match(pattern) != null)\n"
+    "               names.push(name);\n"
+    "       return names;\n"
+    "   }\n"
+    ), expression, $S(begin.c_str()))));
+
+    driver.program_->Replace(context);
+
+    std::ostringstream str;
+    CYOutput out(str, options);
+    out << *driver.program_;
+
+    std::string code(str.str());
+    CYUTF8String json(Run(pool, client_, code));
+
+    CYExpression *result(ParseExpression(pool, json));
+    CYArray *array(dynamic_cast<CYArray *>(result));
+    _assert(array != NULL);
+
+    // XXX: use an std::set?
+    typedef std::vector<std::string> Completions;
+    Completions completions;
+
+    std::string common;
+    bool rest(false);
+
+    for (CYElement *element(array->elements_); element != NULL; element = element->next_) {
+        CYString *string(dynamic_cast<CYString *>(element->value_));
+        _assert(string != NULL);
+
+        std::string completion(string->value_, string->size_);
+        completions.push_back(completion);
+
+        if (!rest) {
+            common = completion;
+            rest = true;
+        } else {
+            size_t limit(completion.size()), size(common.size());
+            if (size > limit)
+                common = common.substr(0, limit);
+            else
+                limit = size;
+            for (limit = 0; limit != size; ++limit)
+                if (common[limit] != completion[limit])
+                    break;
+            if (limit != size)
+                common = common.substr(0, limit);
+        }
+    }
+
+    size_t count(completions.size());
+    if (count == 0)
+        return NULL;
+
+    if (!common.empty()) {
+        size_t size(prefix.str().size());
+        _assert(common.size() >= size);
+        common = common.substr(size);
+    }
+
+    char **results(reinterpret_cast<char **>(malloc(sizeof(char *) * (count + 2))));
+
+    results[0] = strdup(common.c_str());
+    size_t index(0);
+    for (Completions::const_iterator i(completions.begin()); i != completions.end(); ++i)
+        results[++index] = strdup(i->c_str());
+    results[count + 1] = NULL;
+
+    return results;
 }
 
-static void Console(int socket) {
+// need char *, not const char *
+static char name_[] = "cycript";
+static char break_[] = " \t\n\"\\'`@$><=;|&{(" ".:";
+
+static void Console(apr_pool_t *pool, CYOptions &options) {
+    passwd *passwd;
+    if (const char *username = getenv("LOGNAME"))
+        passwd = getpwnam(username);
+    else
+        passwd = getpwuid(getuid());
+
+    const char *basedir(apr_psprintf(pool, "%s/.cycript", passwd->pw_dir));
+    const char *histfile(apr_psprintf(pool, "%s/history", basedir));
+    size_t histlines(0);
+
+    rl_initialize();
+    rl_readline_name = name_;
+
+    mkdir(basedir, 0700);
+    read_history(histfile);
+
     bool bypass(false);
     bool debug(false);
     bool expand(false);
 
     FILE *fout(stdout);
 
-    rl_bind_key('\t', rl_insert);
+    // rl_completer_word_break_characters is broken in libedit
+    rl_basic_word_break_characters = break_;
+    rl_attempted_completion_function = &Complete;
+    rl_bind_key('\t', rl_complete);
 
     struct sigaction action;
     sigemptyset(&action.sa_mask);
@@ -189,7 +401,7 @@ static void Console(int socket) {
     sigaction(SIGINT, &action, NULL);
 
     restart: for (;;) {
-        std::string command;
+        command_.clear();
         std::vector<std::string> lines;
 
         bool extra(false);
@@ -208,6 +420,8 @@ static void Console(int socket) {
         mode_ = Working;
         if (line == NULL)
             break;
+        if (line[0] == '\0')
+            goto read;
 
         if (!extra) {
             extra = true;
@@ -227,11 +441,12 @@ static void Console(int socket) {
                     fflush(fout);
                 }
                 add_history(line);
+                ++histlines;
                 goto restart;
             }
         }
 
-        command += line;
+        command_ += line;
 
         char *begin(line), *end(line + strlen(line));
         while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
@@ -247,14 +462,14 @@ static void Console(int socket) {
         std::string code;
 
         if (bypass)
-            code = command;
+            code = command_;
         else {
-            CYDriver driver("");
+            CYDriver driver;
             cy::parser parser(driver);
             Setup(driver, parser);
 
-            driver.data_ = command.c_str();
-            driver.size_ = command.size();
+            driver.data_ = command_.c_str();
+            driver.size_ = command_.size();
 
             if (parser.parse() != 0 || !driver.errors_.empty()) {
                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
@@ -279,14 +494,15 @@ static void Console(int socket) {
                         std::cerr << "  | ";
                         std::cerr << error->message_ << std::endl;
 
-                        add_history(command.c_str());
+                        add_history(command_.c_str());
+                        ++histlines;
                         goto restart;
                     }
                 }
 
                 driver.errors_.clear();
 
-                command += '\n';
+                command_ += '\n';
                 prompt = "cy> ";
                 goto read;
             }
@@ -294,23 +510,31 @@ static void Console(int socket) {
             if (driver.program_ == NULL)
                 goto restart;
 
-            if (socket != -1)
-                code = command;
+            if (client_ != -1)
+                code = command_;
             else {
                 std::ostringstream str;
-                CYOutput out(str);
-                Setup(out, driver);
+                CYOutput out(str, options);
+                Setup(out, driver, options);
                 out << *driver.program_;
                 code = str.str();
             }
         }
 
-        add_history(command.c_str());
+        add_history(command_.c_str());
+        ++histlines;
 
         if (debug)
             std::cout << code << std::endl;
 
-        Run(socket, code, fout, expand);
+        Run(client_, code, fout, expand);
+    }
+
+    if (append_history$ != NULL) {
+        _syscall(close(_syscall(open(histfile, O_CREAT | O_WRONLY, 0600))));
+        (*append_history$)(histlines, histfile);
+    } else {
+        write_history(histfile);
     }
 
     fputs("\n", fout);
@@ -334,11 +558,14 @@ static void *Map(const char *path, size_t *psize) {
     return base;
 }
 
-int main(int argc, char const * const argv[], char const * const envp[]) {
-    _aprcall(apr_app_initialize(&argc, &argv, &envp));
+void InjectLibrary(pid_t pid);
 
+int Main(int argc, char const * const argv[], char const * const envp[]) {
     bool tty(isatty(STDIN_FILENO));
     bool compile(false);
+    CYOptions options;
+
+    append_history$ = reinterpret_cast<int (*)(int, const char *)>(dlsym(RTLD_DEFAULT, "append_history"));
 
 #ifdef CY_ATTACH
     pid_t pid(_not(pid_t));
@@ -368,7 +595,7 @@ int main(int argc, char const * const argv[], char const * const envp[]) {
                 fprintf(stderr,
                     "usage: cycript [-c]"
 #ifdef CY_ATTACH
-                    " [-p <pid>]"
+                    " [-p <pid|name>]"
 #endif
                     " [<script> [<arg>...]]\n"
                 );
@@ -384,6 +611,8 @@ int main(int argc, char const * const argv[], char const * const envp[]) {
 
             case 'g':
                 if (false);
+                else if (strcmp(arg, "rename") == 0)
+                    options.verbose_ = true;
 #if YYDEBUG
                 else if (strcmp(arg, "bison") == 0)
                     bison_ = true;
@@ -408,10 +637,49 @@ int main(int argc, char const * const argv[], char const * const envp[]) {
             case 'p': {
                 size_t size(strlen(arg));
                 char *end;
+
                 pid = strtoul(arg, &end, 0);
                 if (arg + size != end) {
-                    fprintf(stderr, "invalid pid for -p\n");
-                    return 1;
+                    // XXX: arg needs to be escaped in some horrendous way of doom
+                    const char *command(apr_psprintf(pool, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", arg));
+
+                    if (FILE *pids = popen(command, "r")) {
+                        char value[32];
+                        size = 0;
+
+                        for (;;) {
+                            size_t read(fread(value + size, 1, sizeof(value) - size, pids));
+                            if (read == 0)
+                                break;
+                            else {
+                                size += read;
+                                if (size == sizeof(value)) {
+                                    pid = _not(pid_t);
+                                    goto fail;
+                                }
+                            }
+                        }
+
+                      size:
+                        if (size == 0)
+                            goto fail;
+                        if (value[size - 1] == '\n') {
+                            --size;
+                            goto size;
+                        }
+
+                        value[size] = '\0';
+                        size = strlen(value);
+                        pid = strtoul(value, &end, 0);
+                        if (value + size != end) fail:
+                            pid = _not(pid_t);
+                        _syscall(pclose(pids));
+                    }
+
+                    if (pid == _not(pid_t)) {
+                        fprintf(stderr, "invalid pid for -p\n");
+                        return 1;
+                    }
                 }
             } break;
 #endif
@@ -456,29 +724,42 @@ int main(int argc, char const * const argv[], char const * const envp[]) {
     }
 #endif
 
-    int socket;
-
 #ifdef CY_ATTACH
     if (pid == _not(pid_t))
-        socket = -1;
+        client_ = -1;
     else {
-        socket = _syscall(::socket(PF_UNIX, SOCK_STREAM, 0));
-
-        struct sockaddr_un address;
-        memset(&address, 0, sizeof(address));
-        address.sun_family = AF_UNIX;
-        sprintf(address.sun_path, "/tmp/.s.cy.%u", pid);
-
-        _syscall(connect(socket, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
+        int server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0))); try {
+            struct sockaddr_un address;
+            memset(&address, 0, sizeof(address));
+            address.sun_family = AF_UNIX;
+
+            sprintf(address.sun_path, "/tmp/.s.cy.%u", getpid());
+
+            _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
+            _syscall(chmod(address.sun_path, 0777));
+
+            try {
+                _syscall(listen(server, 1));
+                InjectLibrary(pid);
+                client_ = _syscall(accept(server, NULL, NULL));
+            } catch (...) {
+                // XXX: exception?
+                unlink(address.sun_path);
+                throw;
+            }
+        } catch (...) {
+            _syscall(close(server));
+            throw;
+        }
     }
 #else
-    socket = -1;
+    client_ = -1;
 #endif
 
     if (script == NULL && tty)
-        Console(socket);
+        Console(pool, options);
     else {
-        CYDriver driver(script ?: "<stdin>");
+        CYDriver driver(pool, script ?: "<stdin>");
         cy::parser parser(driver);
         Setup(driver, parser);
 
@@ -511,20 +792,36 @@ int main(int argc, char const * const argv[], char const * const envp[]) {
             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
         } else if (driver.program_ != NULL)
-            if (socket != -1)
-                Run(socket, start, end - start, stdout);
-            else {
+            if (client_ != -1) {
+                std::string code(start, end-start);
+                Run(client_, code, stdout);
+            } else {
                 std::ostringstream str;
-                CYOutput out(str);
-                Setup(out, driver);
+                CYOutput out(str, options);
+                Setup(out, driver, options);
                 out << *driver.program_;
                 std::string code(str.str());
                 if (compile)
                     std::cout << code;
                 else
-                    Run(socket, code, stdout);
+                    Run(client_, code, stdout);
             }
     }
 
     return 0;
 }
+
+int main(int argc, char const * const argv[], char const * const envp[]) {
+    apr_status_t status(apr_app_initialize(&argc, &argv, &envp));
+
+    if (status != APR_SUCCESS) {
+        fprintf(stderr, "apr_app_initialize() != APR_SUCCESS\n");
+        return 1;
+    } else try {
+        return Main(argc, argv, envp);
+    } catch (const CYException &error) {
+        CYPool pool;
+        fprintf(stderr, "%s\n", error.PoolCString(pool));
+        return 1;
+    }
+}