+ } else if (os::shell() == os::CMD_EXE)
+ command = subst(command, "cmd /d /c ", "");
+
+ return ::system(command.c_str());
+}
+
+#else
+
+namespace {
+
+/*
+ * This is a parser that (mostly) mimics the behavior of a posix shell as
+ * regards quoting, but its output is tailored for being processed by QProcess.
+ * Note that shell metacharacters are not parsed.
+ *
+ * The escape character is the backslash.
+ * A backslash that is not quoted preserves the literal value of the following
+ * character, with the exception of a double-quote '"'. If a double-quote
+ * follows a backslash, it will be replaced by three consecutive double-quotes
+ * (this is how the QProcess parser recognizes a '"' as a simple character
+ * instead of a quoting character). Thus, for example:
+ * \\ -> \
+ * \a -> a
+ * \" -> """
+ *
+ * Single-quotes.
+ * Characters enclosed in single-quotes ('') have their literal value preserved.
+ * A single-quote cannot occur within single-quotes. Indeed, a backslash cannot
+ * be used to escape a single-quote in a single-quoted string. In other words,
+ * anything enclosed in single-quotes is passed as is, but the single-quotes
+ * themselves are eliminated. Thus, for example:
+ * '\' -> \
+ * '\\' -> \\
+ * '\a' -> \a
+ * 'a\"b' -> a\"b
+ *
+ * Double-quotes.
+ * Characters enclosed in double-quotes ("") have their literal value preserved,
+ * with the exception of the backslash. The backslash retains its special
+ * meaning as an escape character only when followed by a double-quote.
+ * Contrarily to the behavior of a posix shell, the double-quotes themselves
+ * are *not* eliminated. Thus, for example:
+ * "\\" -> "\\"
+ * "\a" -> "\a"
+ * "a\"b" -> "a"""b"
+ */
+string const parsecmd(string const & incmd, string & infile, string & outfile,
+ string & errfile)
+{
+ bool in_single_quote = false;
+ bool in_double_quote = false;
+ bool escaped = false;
+ string const python_call = "python -tt";
+ vector<string> outcmd(4);
+ size_t start = 0;
+
+ if (prefixIs(incmd, python_call)) {
+ outcmd[0] = os::python();
+ start = python_call.length();
+ }
+
+ for (size_t i = start, o = 0; i < incmd.length(); ++i) {
+ char c = incmd[i];
+ if (c == '\'') {
+ if (in_double_quote || escaped) {
+ if (in_double_quote && escaped)
+ outcmd[o] += '\\';
+ outcmd[o] += c;
+ } else
+ in_single_quote = !in_single_quote;
+ escaped = false;
+ continue;
+ }
+ if (in_single_quote) {
+ outcmd[o] += c;
+ continue;
+ }
+ if (c == '"') {
+ if (escaped) {
+ // Don't triple double-quotes for redirection
+ // files as these won't be parsed by QProcess
+ outcmd[o] += string(o ? "\"" : "\"\"\"");
+ escaped = false;
+ } else {
+ outcmd[o] += c;
+ in_double_quote = !in_double_quote;
+ }
+ } else if (c == '\\' && !escaped) {
+ escaped = !escaped;
+ } else if (c == '>' && !(in_double_quote || escaped)) {
+ if (suffixIs(outcmd[o], " 2")) {
+ outcmd[o] = rtrim(outcmd[o], "2");
+ o = 2;
+ } else {
+ if (suffixIs(outcmd[o], " 1"))
+ outcmd[o] = rtrim(outcmd[o], "1");
+ o = 1;
+ }
+ } else if (c == '<' && !(in_double_quote || escaped)) {
+ o = 3;
+ } else {
+ if (escaped && in_double_quote)
+ outcmd[o] += '\\';
+ outcmd[o] += c;
+ escaped = false;
+ }
+ }
+ infile = trim(outcmd[3], " \"");
+ outfile = trim(outcmd[1], " \"");
+ errfile = trim(outcmd[2], " \"");
+ return trim(outcmd[0]);
+}
+
+} // namespace anon
+
+
+
+int Systemcall::startscript(Starttype how, string const & what,
+ string const & path, string const & lpath,
+ bool process_events)
+{
+ string const what_ss = commandPrep(what);
+ if (verbose)
+ lyxerr << "\nRunning: " << what_ss << endl;
+ else
+ LYXERR(Debug::INFO,"Running: " << what_ss);
+
+ string infile;
+ string outfile;
+ string errfile;
+ QString const cmd = QString::fromLocal8Bit(
+ parsecmd(what_ss, infile, outfile, errfile).c_str());
+
+ SystemcallPrivate d(infile, outfile, errfile);
+
+#ifdef Q_OS_WIN32
+ // QProcess::startDetached cannot provide environment variables. When the
+ // environment variables are set using the latexEnvCmdPrefix and the process
+ // is started with QProcess::startDetached, a console window is shown every
+ // time a viewer is started. To avoid this, we fall back on Windows to the
+ // original implementation that creates a QProcess object.
+ d.startProcess(cmd, path, lpath, false);
+ if (!d.waitWhile(SystemcallPrivate::Starting, process_events, -1)) {
+ LYXERR0("Systemcall: '" << cmd << "' did not start!");
+ LYXERR0("error " << d.errorMessage());
+ return 10;
+ }
+ if (how == DontWait) {
+ d.releaseProcess();
+ return 0;
+ }
+#else
+ d.startProcess(cmd, path, lpath, how == DontWait);
+ if (how == DontWait && d.state == SystemcallPrivate::Running)
+ return 0;
+
+ if (d.state == SystemcallPrivate::Error
+ || !d.waitWhile(SystemcallPrivate::Starting, process_events, -1)) {
+ LYXERR0("Systemcall: '" << cmd << "' did not start!");
+ LYXERR0("error " << d.errorMessage());
+ return 10;
+ }
+#endif
+
+ if (!d.waitWhile(SystemcallPrivate::Running, process_events,
+ os::timeout_min() * 60 * 1000)) {
+ LYXERR0("Systemcall: '" << cmd << "' did not finish!");
+ LYXERR0("error " << d.errorMessage());
+ LYXERR0("status " << d.exitStatusMessage());
+ return 20;
+ }
+
+ int const exit_code = d.exitCode();
+ if (exit_code) {
+ LYXERR0("Systemcall: '" << cmd << "' finished with exit code " << exit_code);
+ }
+
+ return exit_code;
+}
+
+
+SystemcallPrivate::SystemcallPrivate(std::string const & sf, std::string const & of,
+ std::string const & ef)
+ : state(Error), process_(new QProcess), out_index_(0), err_index_(0),
+ in_file_(sf), out_file_(of), err_file_(ef), process_events_(false)
+{
+ if (!in_file_.empty())
+ process_->setStandardInputFile(QString::fromLocal8Bit(in_file_.c_str()));
+ if (!out_file_.empty()) {
+ if (out_file_[0] == '&') {
+ if (subst(out_file_, " ", "") == "&2"
+ && err_file_[0] != '&') {
+ out_file_ = err_file_;
+ process_->setProcessChannelMode(
+ QProcess::MergedChannels);
+ } else {
+ if (err_file_[0] == '&') {
+ // Leave alone things such as
+ // "1>&2 2>&1". Should not be harmful,
+ // but let's give anyway a warning.
+ LYXERR0("Unsupported stdout/stderr redirect.");
+ err_file_.erase();
+ } else {
+ LYXERR0("Ambiguous stdout redirect: "
+ << out_file_);
+ }
+ out_file_ = os::nulldev();
+ }
+ }
+ // Check whether we have to set the output file.
+ if (out_file_ != os::nulldev()) {
+ process_->setStandardOutputFile(QString::fromLocal8Bit(
+ out_file_.c_str()));
+ }
+ }
+ if (!err_file_.empty()) {
+ if (err_file_[0] == '&') {
+ if (subst(err_file_, " ", "") == "&1"
+ && out_file_[0] != '&') {
+ process_->setProcessChannelMode(
+ QProcess::MergedChannels);
+ } else {
+ LYXERR0("Ambiguous stderr redirect: "
+ << err_file_);
+ }
+ // In MergedChannels mode stderr goes to stdout.
+ err_file_ = os::nulldev();
+ }
+ // Check whether we have to set the error file.
+ if (err_file_ != os::nulldev()) {
+ process_->setStandardErrorFile(QString::fromLocal8Bit(
+ err_file_.c_str()));
+ }