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-rw-r--r--js/src/shell/OSObject.cpp1029
1 files changed, 1029 insertions, 0 deletions
diff --git a/js/src/shell/OSObject.cpp b/js/src/shell/OSObject.cpp
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+++ b/js/src/shell/OSObject.cpp
@@ -0,0 +1,1029 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// OSObject.h - os object for exposing posix system calls in the JS shell
+
+#include "shell/OSObject.h"
+
+#include <errno.h>
+#include <stdlib.h>
+#ifdef XP_WIN
+#include <direct.h>
+#include <process.h>
+#include <string.h>
+#else
+#include <sys/wait.h>
+#include <unistd.h>
+#endif
+
+#include "jsapi.h"
+// For JSFunctionSpecWithHelp
+#include "jsfriendapi.h"
+#include "jsobj.h"
+#ifdef XP_WIN
+# include "jswin.h"
+#endif
+#include "jswrapper.h"
+
+#include "js/Conversions.h"
+#include "shell/jsshell.h"
+#include "vm/StringBuffer.h"
+#include "vm/TypedArrayObject.h"
+
+#include "jsobjinlines.h"
+
+#ifdef XP_WIN
+# define PATH_MAX (MAX_PATH > _MAX_DIR ? MAX_PATH : _MAX_DIR)
+# define getcwd _getcwd
+#else
+# include <libgen.h>
+#endif
+
+using js::shell::RCFile;
+
+static RCFile** gErrFilePtr = nullptr;
+static RCFile** gOutFilePtr = nullptr;
+
+namespace js {
+namespace shell {
+
+#ifdef XP_WIN
+const char PathSeparator = '\\';
+#else
+const char PathSeparator = '/';
+#endif
+
+static bool
+IsAbsolutePath(const JSAutoByteString& filename)
+{
+ const char* pathname = filename.ptr();
+
+ if (pathname[0] == PathSeparator)
+ return true;
+
+#ifdef XP_WIN
+ // On Windows there are various forms of absolute paths (see
+ // http://msdn.microsoft.com/en-us/library/windows/desktop/aa365247%28v=vs.85%29.aspx
+ // for details):
+ //
+ // "\..."
+ // "\\..."
+ // "C:\..."
+ //
+ // The first two cases are handled by the test above so we only need a test
+ // for the last one here.
+
+ if ((strlen(pathname) > 3 &&
+ isalpha(pathname[0]) && pathname[1] == ':' && pathname[2] == '\\'))
+ {
+ return true;
+ }
+#endif
+
+ return false;
+}
+
+/*
+ * Resolve a (possibly) relative filename to an absolute path. If
+ * |scriptRelative| is true, then the result will be relative to the directory
+ * containing the currently-running script, or the current working directory if
+ * the currently-running script is "-e" (namely, you're using it from the
+ * command line.) Otherwise, it will be relative to the current working
+ * directory.
+ */
+JSString*
+ResolvePath(JSContext* cx, HandleString filenameStr, PathResolutionMode resolveMode)
+{
+ if (!filenameStr) {
+#ifdef XP_WIN
+ return JS_NewStringCopyZ(cx, "nul");
+#else
+ return JS_NewStringCopyZ(cx, "/dev/null");
+#endif
+ }
+
+ JSAutoByteString filename(cx, filenameStr);
+ if (!filename)
+ return nullptr;
+
+ if (IsAbsolutePath(filename))
+ return filenameStr;
+
+ /* Get the currently executing script's name. */
+ JS::AutoFilename scriptFilename;
+ if (!DescribeScriptedCaller(cx, &scriptFilename))
+ return nullptr;
+
+ if (!scriptFilename.get())
+ return nullptr;
+
+ if (strcmp(scriptFilename.get(), "-e") == 0 || strcmp(scriptFilename.get(), "typein") == 0)
+ resolveMode = RootRelative;
+
+ char buffer[PATH_MAX+1];
+ if (resolveMode == ScriptRelative) {
+#ifdef XP_WIN
+ // The docs say it can return EINVAL, but the compiler says it's void
+ _splitpath(scriptFilename.get(), nullptr, buffer, nullptr, nullptr);
+#else
+ strncpy(buffer, scriptFilename.get(), PATH_MAX+1);
+ if (buffer[PATH_MAX] != '\0')
+ return nullptr;
+
+ // dirname(buffer) might return buffer, or it might return a
+ // statically-allocated string
+ memmove(buffer, dirname(buffer), strlen(buffer) + 1);
+#endif
+ } else {
+ const char* cwd = getcwd(buffer, PATH_MAX);
+ if (!cwd)
+ return nullptr;
+ }
+
+ size_t len = strlen(buffer);
+ buffer[len] = '/';
+ strncpy(buffer + len + 1, filename.ptr(), sizeof(buffer) - (len+1));
+ if (buffer[PATH_MAX] != '\0')
+ return nullptr;
+
+ return JS_NewStringCopyZ(cx, buffer);
+}
+
+JSObject*
+FileAsTypedArray(JSContext* cx, JS::HandleString pathnameStr)
+{
+ JSAutoByteString pathname(cx, pathnameStr);
+ if (!pathname)
+ return nullptr;
+
+ FILE* file = fopen(pathname.ptr(), "rb");
+ if (!file) {
+ /*
+ * Use Latin1 variant here because the encoding of the return value of
+ * strerror function can be non-UTF-8.
+ */
+ JS_ReportErrorLatin1(cx, "can't open %s: %s", pathname.ptr(), strerror(errno));
+ return nullptr;
+ }
+ AutoCloseFile autoClose(file);
+
+ RootedObject obj(cx);
+ if (fseek(file, 0, SEEK_END) != 0) {
+ pathname.clear();
+ if (!pathname.encodeUtf8(cx, pathnameStr))
+ return nullptr;
+ JS_ReportErrorUTF8(cx, "can't seek end of %s", pathname.ptr());
+ } else {
+ size_t len = ftell(file);
+ if (fseek(file, 0, SEEK_SET) != 0) {
+ pathname.clear();
+ if (!pathname.encodeUtf8(cx, pathnameStr))
+ return nullptr;
+ JS_ReportErrorUTF8(cx, "can't seek start of %s", pathname.ptr());
+ } else {
+ obj = JS_NewUint8Array(cx, len);
+ if (!obj)
+ return nullptr;
+ js::TypedArrayObject& ta = obj->as<js::TypedArrayObject>();
+ if (ta.isSharedMemory()) {
+ // Must opt in to use shared memory. For now, don't.
+ //
+ // (It is incorrect to read into the buffer without
+ // synchronization since that can create a race. A
+ // lock here won't fix it - both sides must
+ // participate. So what one must do is to create a
+ // temporary buffer, read into that, and use a
+ // race-safe primitive to copy memory into the
+ // buffer.)
+ pathname.clear();
+ if (!pathname.encodeUtf8(cx, pathnameStr))
+ return nullptr;
+ JS_ReportErrorUTF8(cx, "can't read %s: shared memory buffer", pathname.ptr());
+ return nullptr;
+ }
+ char* buf = static_cast<char*>(ta.viewDataUnshared());
+ size_t cc = fread(buf, 1, len, file);
+ if (cc != len) {
+ if (ptrdiff_t(cc) < 0) {
+ /*
+ * Use Latin1 variant here because the encoding of the return
+ * value of strerror function can be non-UTF-8.
+ */
+ JS_ReportErrorLatin1(cx, "can't read %s: %s", pathname.ptr(), strerror(errno));
+ } else {
+ pathname.clear();
+ if (!pathname.encodeUtf8(cx, pathnameStr))
+ return nullptr;
+ JS_ReportErrorUTF8(cx, "can't read %s: short read", pathname.ptr());
+ }
+ obj = nullptr;
+ }
+ }
+ }
+ return obj;
+}
+
+static bool
+ReadFile(JSContext* cx, unsigned argc, Value* vp, bool scriptRelative)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ if (args.length() < 1 || args.length() > 2) {
+ JS_ReportErrorNumberASCII(cx, js::shell::my_GetErrorMessage, nullptr,
+ args.length() < 1 ? JSSMSG_NOT_ENOUGH_ARGS : JSSMSG_TOO_MANY_ARGS,
+ "snarf");
+ return false;
+ }
+
+ if (!args[0].isString() || (args.length() == 2 && !args[1].isString())) {
+ JS_ReportErrorNumberASCII(cx, js::shell::my_GetErrorMessage, nullptr, JSSMSG_INVALID_ARGS,
+ "snarf");
+ return false;
+ }
+
+ RootedString givenPath(cx, args[0].toString());
+ RootedString str(cx, js::shell::ResolvePath(cx, givenPath, scriptRelative ? ScriptRelative : RootRelative));
+ if (!str)
+ return false;
+
+ if (args.length() > 1) {
+ JSString* opt = JS::ToString(cx, args[1]);
+ if (!opt)
+ return false;
+ bool match;
+ if (!JS_StringEqualsAscii(cx, opt, "binary", &match))
+ return false;
+ if (match) {
+ JSObject* obj;
+ if (!(obj = FileAsTypedArray(cx, str)))
+ return false;
+ args.rval().setObject(*obj);
+ return true;
+ }
+ }
+
+ if (!(str = FileAsString(cx, str)))
+ return false;
+ args.rval().setString(str);
+ return true;
+}
+
+static bool
+osfile_readFile(JSContext* cx, unsigned argc, Value* vp)
+{
+ return ReadFile(cx, argc, vp, false);
+}
+
+static bool
+osfile_readRelativeToScript(JSContext* cx, unsigned argc, Value* vp)
+{
+ return ReadFile(cx, argc, vp, true);
+}
+
+static bool
+osfile_writeTypedArrayToFile(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ if (args.length() != 2 ||
+ !args[0].isString() ||
+ !args[1].isObject() ||
+ !args[1].toObject().is<TypedArrayObject>())
+ {
+ JS_ReportErrorNumberASCII(cx, my_GetErrorMessage, nullptr, JSSMSG_INVALID_ARGS,
+ "writeTypedArrayToFile");
+ return false;
+ }
+
+ RootedString givenPath(cx, args[0].toString());
+ RootedString str(cx, ResolvePath(cx, givenPath, RootRelative));
+ if (!str)
+ return false;
+
+ JSAutoByteString filename(cx, str);
+ if (!filename)
+ return false;
+
+ FILE* file = fopen(filename.ptr(), "wb");
+ if (!file) {
+ /*
+ * Use Latin1 variant here because the encoding of the return value of
+ * strerror function can be non-UTF-8.
+ */
+ JS_ReportErrorLatin1(cx, "can't open %s: %s", filename.ptr(), strerror(errno));
+ return false;
+ }
+ AutoCloseFile autoClose(file);
+
+ TypedArrayObject* obj = &args[1].toObject().as<TypedArrayObject>();
+
+ if (obj->isSharedMemory()) {
+ // Must opt in to use shared memory. For now, don't.
+ //
+ // See further comments in FileAsTypedArray, above.
+ filename.clear();
+ if (!filename.encodeUtf8(cx, str))
+ return false;
+ JS_ReportErrorUTF8(cx, "can't write %s: shared memory buffer", filename.ptr());
+ return false;
+ }
+ void* buf = obj->viewDataUnshared();
+ if (fwrite(buf, obj->bytesPerElement(), obj->length(), file) != obj->length() ||
+ !autoClose.release())
+ {
+ filename.clear();
+ if (!filename.encodeUtf8(cx, str))
+ return false;
+ JS_ReportErrorUTF8(cx, "can't write %s", filename.ptr());
+ return false;
+ }
+
+ args.rval().setUndefined();
+ return true;
+}
+
+/* static */ RCFile*
+RCFile::create(JSContext* cx, const char* filename, const char* mode)
+{
+ FILE* fp = fopen(filename, mode);
+ if (!fp)
+ return nullptr;
+
+ RCFile* file = cx->new_<RCFile>(fp);
+ if (!file) {
+ fclose(fp);
+ return nullptr;
+ }
+
+ return file;
+}
+
+void
+RCFile::close()
+{
+ if (fp)
+ fclose(fp);
+ fp = nullptr;
+}
+
+bool
+RCFile::release()
+{
+ if (--numRefs)
+ return false;
+ this->close();
+ return true;
+}
+
+class FileObject : public JSObject {
+ enum : uint32_t {
+ FILE_SLOT = 0,
+ NUM_SLOTS
+ };
+
+ public:
+ static const js::Class class_;
+
+ static FileObject* create(JSContext* cx, RCFile* file) {
+ JSObject* obj = js::NewObjectWithClassProto(cx, &class_, nullptr);
+ if (!obj)
+ return nullptr;
+
+ FileObject* fileObj = &obj->as<FileObject>();
+ fileObj->setRCFile(file);
+ file->acquire();
+ return fileObj;
+ }
+
+ static void finalize(FreeOp* fop, JSObject* obj) {
+ FileObject* fileObj = &obj->as<FileObject>();
+ RCFile* file = fileObj->rcFile();
+ if (file->release()) {
+ fileObj->setRCFile(nullptr);
+ fop->delete_(file);
+ }
+ }
+
+ bool isOpen() {
+ RCFile* file = rcFile();
+ return file && file->isOpen();
+ }
+
+ void close() {
+ if (!isOpen())
+ return;
+ rcFile()->close();
+ }
+
+ RCFile* rcFile() {
+ return reinterpret_cast<RCFile*>(js::GetReservedSlot(this, FILE_SLOT).toPrivate());
+ }
+
+ private:
+
+ void setRCFile(RCFile* file) {
+ js::SetReservedSlot(this, FILE_SLOT, PrivateValue(file));
+ }
+};
+
+static const js::ClassOps FileObjectClassOps = {
+ nullptr, /* addProperty */
+ nullptr, /* delProperty */
+ nullptr, /* getProperty */
+ nullptr, /* setProperty */
+ nullptr, /* enumerate */
+ nullptr, /* resolve */
+ nullptr, /* mayResolve */
+ FileObject::finalize, /* finalize */
+ nullptr, /* call */
+ nullptr, /* hasInstance */
+ nullptr, /* construct */
+ nullptr /* trace */
+};
+
+const js::Class FileObject::class_ = {
+ "File",
+ JSCLASS_HAS_RESERVED_SLOTS(FileObject::NUM_SLOTS) |
+ JSCLASS_FOREGROUND_FINALIZE,
+ &FileObjectClassOps
+};
+
+static FileObject*
+redirect(JSContext* cx, HandleString relFilename, RCFile** globalFile)
+{
+ RootedString filename(cx, ResolvePath(cx, relFilename, RootRelative));
+ if (!filename)
+ return nullptr;
+ JSAutoByteString filenameABS(cx, filename);
+ if (!filenameABS)
+ return nullptr;
+ RCFile* file = RCFile::create(cx, filenameABS.ptr(), "wb");
+ if (!file) {
+ /*
+ * Use Latin1 variant here because the encoding of the return value of
+ * strerror function can be non-UTF-8.
+ */
+ JS_ReportErrorLatin1(cx, "cannot redirect to %s: %s", filenameABS.ptr(), strerror(errno));
+ return nullptr;
+ }
+
+ // Grant the global gOutFile ownership of the new file, release ownership
+ // of its old file, and return a FileObject owning the old file.
+ file->acquire(); // Global owner of new file
+
+ FileObject* fileObj = FileObject::create(cx, *globalFile); // Newly created owner of old file
+ if (!fileObj) {
+ file->release();
+ return nullptr;
+ }
+
+ (*globalFile)->release(); // Release (global) ownership of old file.
+ *globalFile = file;
+
+ return fileObj;
+}
+
+static bool
+Redirect(JSContext* cx, const CallArgs& args, RCFile** outFile)
+{
+ if (args.length() > 1) {
+ JS_ReportErrorNumberASCII(cx, js::shell::my_GetErrorMessage, nullptr, JSSMSG_INVALID_ARGS,
+ "redirect");
+ return false;
+ }
+
+ RCFile* oldFile = *outFile;
+ RootedObject oldFileObj(cx, FileObject::create(cx, oldFile));
+ if (!oldFileObj)
+ return false;
+
+ if (args.get(0).isUndefined()) {
+ args.rval().setObject(*oldFileObj);
+ return true;
+ }
+
+ if (args[0].isObject()) {
+ RootedObject fileObj(cx, js::CheckedUnwrap(&args[0].toObject()));
+ if (!fileObj)
+ return false;
+
+ if (fileObj->is<FileObject>()) {
+ // Passed in a FileObject. Create a FileObject for the previous
+ // global file, and set the global file to the passed-in one.
+ *outFile = fileObj->as<FileObject>().rcFile();
+ (*outFile)->acquire();
+ oldFile->release();
+
+ args.rval().setObject(*oldFileObj);
+ return true;
+ }
+ }
+
+ RootedString filename(cx);
+ if (!args[0].isNull()) {
+ filename = JS::ToString(cx, args[0]);
+ if (!filename)
+ return false;
+ }
+
+ if (!redirect(cx, filename, outFile))
+ return false;
+
+ args.rval().setObject(*oldFileObj);
+ return true;
+}
+
+static bool
+osfile_redirectOutput(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return Redirect(cx, args, gOutFilePtr);
+}
+
+static bool
+osfile_redirectError(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+ return Redirect(cx, args, gErrFilePtr);
+}
+
+static bool
+osfile_close(JSContext* cx, unsigned argc, Value* vp) {
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ Rooted<FileObject*> fileObj(cx);
+ if (args.get(0).isObject()) {
+ JSObject *obj = js::CheckedUnwrap(&args[0].toObject());
+ if (obj->is<FileObject>())
+ fileObj = &obj->as<FileObject>();
+ }
+
+ if (!fileObj) {
+ JS_ReportErrorNumberASCII(cx, js::shell::my_GetErrorMessage, nullptr, JSSMSG_INVALID_ARGS,
+ "close");
+ return false;
+ }
+
+ fileObj->close();
+
+ args.rval().setUndefined();
+ return true;
+}
+
+static const JSFunctionSpecWithHelp osfile_functions[] = {
+ JS_FN_HELP("readFile", osfile_readFile, 1, 0,
+"readFile(filename, [\"binary\"])",
+" Read filename into returned string. Filename is relative to the current\n"
+ " working directory."),
+
+ JS_FN_HELP("readRelativeToScript", osfile_readRelativeToScript, 1, 0,
+"readRelativeToScript(filename, [\"binary\"])",
+" Read filename into returned string. Filename is relative to the directory\n"
+" containing the current script."),
+
+ JS_FS_HELP_END
+};
+
+static const JSFunctionSpecWithHelp osfile_unsafe_functions[] = {
+ JS_FN_HELP("writeTypedArrayToFile", osfile_writeTypedArrayToFile, 2, 0,
+"writeTypedArrayToFile(filename, data)",
+" Write the contents of a typed array to the named file."),
+
+ JS_FN_HELP("redirect", osfile_redirectOutput, 1, 0,
+"redirect([path-or-object])",
+" Redirect print() output to the named file.\n"
+" Return an opaque object representing the previous destination, which\n"
+" may be passed into redirect() later to restore the output."),
+
+ JS_FN_HELP("redirectErr", osfile_redirectError, 1, 0,
+"redirectErr([path-or-object])",
+" Same as redirect(), but for printErr"),
+
+ JS_FN_HELP("close", osfile_close, 1, 0,
+"close(object)",
+" Close the file returned by an earlier redirect call."),
+
+ JS_FS_HELP_END
+};
+
+static bool
+ospath_isAbsolute(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ if (args.length() != 1 || !args[0].isString()) {
+ JS_ReportErrorNumberASCII(cx, my_GetErrorMessage, nullptr, JSSMSG_INVALID_ARGS,
+ "isAbsolute");
+ return false;
+ }
+
+ JSAutoByteString path(cx, args[0].toString());
+ if (!path)
+ return false;
+
+ args.rval().setBoolean(IsAbsolutePath(path));
+ return true;
+}
+
+static bool
+ospath_join(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ if (args.length() < 1) {
+ JS_ReportErrorNumberASCII(cx, my_GetErrorMessage, nullptr, JSSMSG_INVALID_ARGS, "join");
+ return false;
+ }
+
+ // This function doesn't take into account some aspects of Windows paths,
+ // e.g. the drive letter is always reset when an absolute path is appended.
+
+ StringBuffer buffer(cx);
+
+ for (unsigned i = 0; i < args.length(); i++) {
+ if (!args[i].isString()) {
+ JS_ReportErrorASCII(cx, "join expects string arguments only");
+ return false;
+ }
+
+ JSAutoByteString path(cx, args[i].toString());
+ if (!path)
+ return false;
+
+ if (IsAbsolutePath(path)) {
+ MOZ_ALWAYS_TRUE(buffer.resize(0));
+ } else if (i != 0) {
+ if (!buffer.append(PathSeparator))
+ return false;
+ }
+
+ if (!buffer.append(args[i].toString()))
+ return false;
+ }
+
+ JSString* result = buffer.finishString();
+ if (!result)
+ return false;
+
+ args.rval().setString(result);
+ return true;
+}
+
+static const JSFunctionSpecWithHelp ospath_functions[] = {
+ JS_FN_HELP("isAbsolute", ospath_isAbsolute, 1, 0,
+"isAbsolute(path)",
+" Return whether the given path is absolute."),
+
+ JS_FN_HELP("join", ospath_join, 1, 0,
+"join(paths...)",
+" Join one or more path components in a platform independent way."),
+
+ JS_FS_HELP_END
+};
+
+static bool
+os_getenv(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+ if (args.length() < 1) {
+ JS_ReportErrorASCII(cx, "os.getenv requires 1 argument");
+ return false;
+ }
+ RootedString key(cx, ToString(cx, args[0]));
+ if (!key)
+ return false;
+ JSAutoByteString keyBytes;
+ if (!keyBytes.encodeUtf8(cx, key))
+ return false;
+
+ if (const char* valueBytes = getenv(keyBytes.ptr())) {
+ RootedString value(cx, JS_NewStringCopyZ(cx, valueBytes));
+ if (!value)
+ return false;
+ args.rval().setString(value);
+ } else {
+ args.rval().setUndefined();
+ }
+ return true;
+}
+
+static bool
+os_getpid(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+ if (args.length() != 0) {
+ JS_ReportErrorASCII(cx, "os.getpid takes no arguments");
+ return false;
+ }
+ args.rval().setInt32(getpid());
+ return true;
+}
+
+#if !defined(XP_WIN)
+
+// There are two possible definitions of strerror_r floating around. The GNU
+// one returns a char* which may or may not be the buffer you passed in. The
+// other one returns an integer status code, and always writes the result into
+// the provided buffer.
+
+inline char*
+strerror_message(int result, char* buffer)
+{
+ return result == 0 ? buffer : nullptr;
+}
+
+inline char*
+strerror_message(char* result, char* buffer)
+{
+ return result;
+}
+
+#endif
+
+static void
+ReportSysError(JSContext* cx, const char* prefix)
+{
+ char buffer[200];
+
+#if defined(XP_WIN)
+ strerror_s(buffer, sizeof(buffer), errno);
+ const char* errstr = buffer;
+#else
+ const char* errstr = strerror_message(strerror_r(errno, buffer, sizeof(buffer)), buffer);
+#endif
+
+ if (!errstr)
+ errstr = "unknown error";
+
+ size_t nbytes = strlen(prefix) + strlen(errstr) + 3;
+ char* final = (char*) js_malloc(nbytes);
+ if (!final) {
+ JS_ReportOutOfMemory(cx);
+ return;
+ }
+
+ snprintf(final, nbytes, "%s: %s", prefix, errstr);
+ /*
+ * Use Latin1 variant here because the encoding of the return value of
+ * strerror_s and strerror_r function can be non-UTF-8.
+ */
+ JS_ReportErrorLatin1(cx, "%s", final);
+ js_free(final);
+}
+
+static bool
+os_system(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ if (args.length() == 0) {
+ JS_ReportErrorASCII(cx, "os.system requires 1 argument");
+ return false;
+ }
+
+ JSString* str = JS::ToString(cx, args[0]);
+ if (!str)
+ return false;
+
+ JSAutoByteString command(cx, str);
+ if (!command)
+ return false;
+
+ int result = system(command.ptr());
+ if (result == -1) {
+ ReportSysError(cx, "system call failed");
+ return false;
+ }
+
+ args.rval().setInt32(result);
+ return true;
+}
+
+#ifndef XP_WIN
+static bool
+os_spawn(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ if (args.length() == 0) {
+ JS_ReportErrorASCII(cx, "os.spawn requires 1 argument");
+ return false;
+ }
+
+ JSString* str = JS::ToString(cx, args[0]);
+ if (!str)
+ return false;
+
+ JSAutoByteString command(cx, str);
+ if (!command)
+ return false;
+
+ int32_t childPid = fork();
+ if (childPid == -1) {
+ ReportSysError(cx, "fork failed");
+ return false;
+ }
+
+ if (childPid) {
+ args.rval().setInt32(childPid);
+ return true;
+ }
+
+ // We are in the child
+
+ const char* cmd[] = {"sh", "-c", nullptr, nullptr};
+ cmd[2] = command.ptr();
+
+ execvp("sh", (char * const*)cmd);
+ exit(1);
+}
+
+static bool
+os_kill(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+ int32_t pid;
+ if (args.length() < 1) {
+ JS_ReportErrorASCII(cx, "os.kill requires 1 argument");
+ return false;
+ }
+ if (!JS::ToInt32(cx, args[0], &pid))
+ return false;
+
+ // It is too easy to kill yourself accidentally with os.kill("goose").
+ if (pid == 0 && !args[0].isInt32()) {
+ JS_ReportErrorASCII(cx, "os.kill requires numeric pid");
+ return false;
+ }
+
+ int signal = SIGINT;
+ if (args.length() > 1) {
+ if (!JS::ToInt32(cx, args[1], &signal))
+ return false;
+ }
+
+ int status = kill(pid, signal);
+ if (status == -1) {
+ ReportSysError(cx, "kill failed");
+ return false;
+ }
+
+ args.rval().setUndefined();
+ return true;
+}
+
+static bool
+os_waitpid(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ int32_t pid;
+ if (args.length() == 0) {
+ pid = -1;
+ } else {
+ if (!JS::ToInt32(cx, args[0], &pid))
+ return false;
+ }
+
+ bool nohang = false;
+ if (args.length() >= 2)
+ nohang = JS::ToBoolean(args[1]);
+
+ int status = 0;
+ pid_t result = waitpid(pid, &status, nohang ? WNOHANG : 0);
+ if (result == -1) {
+ ReportSysError(cx, "os.waitpid failed");
+ return false;
+ }
+
+ RootedObject info(cx, JS_NewPlainObject(cx));
+ if (!info)
+ return false;
+
+ RootedValue v(cx);
+ if (result != 0) {
+ v.setInt32(result);
+ if (!JS_DefineProperty(cx, info, "pid", v, JSPROP_ENUMERATE))
+ return false;
+ if (WIFEXITED(status)) {
+ v.setInt32(WEXITSTATUS(status));
+ if (!JS_DefineProperty(cx, info, "exitStatus", v, JSPROP_ENUMERATE))
+ return false;
+ }
+ }
+
+ args.rval().setObject(*info);
+ return true;
+}
+#endif
+
+static const JSFunctionSpecWithHelp os_functions[] = {
+ JS_FN_HELP("getenv", os_getenv, 1, 0,
+"getenv(variable)",
+" Get the value of an environment variable."),
+
+ JS_FN_HELP("getpid", os_getpid, 0, 0,
+"getpid()",
+" Return the current process id."),
+
+ JS_FN_HELP("system", os_system, 1, 0,
+"system(command)",
+" Execute command on the current host, returning result code or throwing an\n"
+" exception on failure."),
+
+#ifndef XP_WIN
+ JS_FN_HELP("spawn", os_spawn, 1, 0,
+"spawn(command)",
+" Start up a separate process running the given command. Returns the pid."),
+
+ JS_FN_HELP("kill", os_kill, 1, 0,
+"kill(pid[, signal])",
+" Send a signal to the given pid. The default signal is SIGINT. The signal\n"
+" passed in must be numeric, if given."),
+
+ JS_FN_HELP("waitpid", os_waitpid, 1, 0,
+"waitpid(pid[, nohang])",
+" Calls waitpid(). 'nohang' is a boolean indicating whether to pass WNOHANG.\n"
+" The return value is an object containing a 'pid' field, if a process was waitable\n"
+" and an 'exitStatus' field if a pid exited."),
+#endif
+
+ JS_FS_HELP_END
+};
+
+bool
+DefineOS(JSContext* cx, HandleObject global,
+ bool fuzzingSafe,
+ RCFile** shellOut, RCFile** shellErr)
+{
+ RootedObject obj(cx, JS_NewPlainObject(cx));
+ if (!obj || !JS_DefineProperty(cx, global, "os", obj, 0))
+ return false;
+
+ if (!fuzzingSafe) {
+ if (!JS_DefineFunctionsWithHelp(cx, obj, os_functions))
+ return false;
+ }
+
+ RootedObject osfile(cx, JS_NewPlainObject(cx));
+ if (!osfile ||
+ !JS_DefineFunctionsWithHelp(cx, osfile, osfile_functions) ||
+ !JS_DefineProperty(cx, obj, "file", osfile, 0))
+ {
+ return false;
+ }
+
+ if (!fuzzingSafe) {
+ if (!JS_DefineFunctionsWithHelp(cx, osfile, osfile_unsafe_functions))
+ return false;
+ }
+
+ if (!GenerateInterfaceHelp(cx, osfile, "os.file"))
+ return false;
+
+ RootedObject ospath(cx, JS_NewPlainObject(cx));
+ if (!ospath ||
+ !JS_DefineFunctionsWithHelp(cx, ospath, ospath_functions) ||
+ !JS_DefineProperty(cx, obj, "path", ospath, 0) ||
+ !GenerateInterfaceHelp(cx, ospath, "os.path"))
+ {
+ return false;
+ }
+
+ if (!GenerateInterfaceHelp(cx, obj, "os"))
+ return false;
+
+ gOutFilePtr = shellOut;
+ gErrFilePtr = shellErr;
+
+ // For backwards compatibility, expose various os.file.* functions as
+ // direct methods on the global.
+ RootedValue val(cx);
+
+ struct {
+ const char* src;
+ const char* dst;
+ } osfile_exports[] = {
+ { "readFile", "read" },
+ { "readFile", "snarf" },
+ { "readRelativeToScript", "readRelativeToScript" },
+ { "redirect", "redirect" },
+ { "redirectErr", "redirectErr" }
+ };
+
+ for (auto pair : osfile_exports) {
+ if (!JS_GetProperty(cx, osfile, pair.src, &val))
+ return false;
+ if (val.isObject()) {
+ RootedObject function(cx, &val.toObject());
+ if (!JS_DefineProperty(cx, global, pair.dst, function, 0))
+ return false;
+ }
+ }
+
+ return true;
+}
+
+} // namespace shell
+} // namespace js
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 19:23:40 +0000