/**
* \file forkedcall.C
- * Copyright 2002 the LyX Team
- * Read the file COPYING
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
*
* \author Asger Alstrup
*
* Interface cleaned up by
- * \author Angus Leeming <a.leeming@ic.ac.uk>
+ * \author Angus Leeming
+ *
+ * Full author contact details are available in file CREDITS
*
* An instance of Class Forkedcall represents a single child process.
*
#endif
-Forkedcall::Forkedcall()
- : pid_(0), retval_(0)
-{}
-
-
-int Forkedcall::startscript(Starttype wait, string const & what)
-{
- if (wait == Wait) {
- command_ = what;
- retval_ = 0;
-
- pid_ = generateChild();
- if (pid_ <= 0) { // child or fork failed.
- retval_ = 1;
- } else {
- retval_ = waitForChild();
- }
-
- return retval_;
- }
-
- // DontWait
- retval_ = startscript(what, SignalTypePtr());
- return retval_;
-}
-
-
-int Forkedcall::startscript(string const & what, SignalTypePtr signal)
-{
- command_ = what;
- signal_ = signal;
- retval_ = 0;
-
- pid_ = generateChild();
- if (pid_ <= 0) { // child or fork failed.
- retval_ = 1;
- return retval_;
- }
-
- // Non-blocking execution.
- // Integrate into the Controller
- ForkedcallsController & contr = ForkedcallsController::get();
- contr.addCall(*this);
-
- return retval_;
-}
-
-
-void Forkedcall::emitSignal()
-{
- if (signal_.get()) {
- signal_->operator()(command_, pid_, retval_);
- }
-}
-
-
namespace {
class Murder : public boost::signals::trackable {
} // namespace anon
-void Forkedcall::kill(int tol)
+ForkedProcess::ForkedProcess()
+ : pid_(0), retval_(0)
+{}
+
+
+void ForkedProcess::emitSignal()
{
- lyxerr << "Forkedcall::kill(" << tol << ")" << std::endl;
+ if (signal_.get()) {
+ signal_->operator()(pid_, retval_);
+ }
+}
+
+
+// Wait for child process to finish.
+int ForkedProcess::runBlocking()
+{
+ retval_ = 0;
+ pid_ = generateChild();
+ if (pid_ <= 0) { // child or fork failed.
+ retval_ = 1;
+ return retval_;
+ }
+
+ retval_ = waitForChild();
+ return retval_;
+}
+
+
+// Do not wait for child process to finish.
+int ForkedProcess::runNonBlocking()
+{
+ retval_ = 0;
+ pid_ = generateChild();
+ if (pid_ <= 0) { // child or fork failed.
+ retval_ = 1;
+ return retval_;
+ }
+
+ // Non-blocking execution.
+ // Integrate into the Controller
+ ForkedcallsController & contr = ForkedcallsController::get();
+ contr.addCall(*this);
+
+ return retval_;
+}
+
+void ForkedProcess::kill(int tol)
+{
+ lyxerr << "ForkedProcess::kill(" << tol << ")" << std::endl;
if (pid() == 0) {
lyxerr << "Can't kill non-existent process!" << endl;
return;
// Wait for child process to finish. Returns returncode from child.
-int Forkedcall::waitForChild() {
+int ForkedProcess::waitForChild()
+{
// We'll pretend that the child returns 1 on all error conditions.
retval_ = 1;
int status;
}
+int Forkedcall::startscript(Starttype wait, string const & what)
+{
+ if (wait != Wait) {
+ retval_ = startscript(what, SignalTypePtr());
+ return retval_;
+ }
+
+ command_ = what;
+ signal_.reset();
+ return runBlocking();
+}
+
+
+int Forkedcall::startscript(string const & what, SignalTypePtr signal)
+{
+ command_ = what;
+ signal_ = signal;
+
+ return runNonBlocking();
+}
+
+
// generate child in background
-pid_t Forkedcall::generateChild()
+int Forkedcall::generateChild()
{
- const int MAX_ARGV = 255;
- char *syscmd = 0;
+ // Split command_ up into a char * array
+ int const MAX_ARGV = 255;
char *argv[MAX_ARGV];
- string childcommand(command_); // copy
- bool more = true;
- string rest = split(command_, childcommand, ' ');
-
- int index = 0;
- while (more) {
- childcommand = ltrim(childcommand);
- if (syscmd == 0) {
- syscmd = new char[childcommand.length() + 1];
- childcommand.copy(syscmd, childcommand.length());
- syscmd[childcommand.length()] = '\0';
- }
- if (!childcommand.empty()) {
- char * tmp = new char[childcommand.length() + 1];
- childcommand.copy(tmp, childcommand.length());
- tmp[childcommand.length()] = '\0';
- argv[index++] = tmp;
- }
+ string line = command_;
+ int index = 0;
+ for (; index < MAX_ARGV-1; ++index) {
+ string word;
+ line = split(line, word, ' ');
+ if (word.empty())
+ break;
+
+ char * tmp = new char[word.length() + 1];
+ word.copy(tmp, word.length());
+ tmp[word.length()] = '\0';
- // reinit
- more = !rest.empty();
- if (more)
- rest = split(rest, childcommand, ' ');
+ argv[index] = tmp;
}
argv[index] = 0;
#ifndef __EMX__
- pid_t cpid = ::fork();
- if (cpid == 0) { // child
- execvp(syscmd, argv);
+ pid_t const cpid = ::fork();
+ if (cpid == 0) {
+ // Child
+ execvp(argv[0], argv);
+
// If something goes wrong, we end up here
- string args;
- int i = 0;
- while (argv[i] != 0)
- args += string(" ") + argv[i++];
- lyxerr << "execvp of \"" << syscmd << args << "\" failed: "
+ lyxerr << "execvp of \"" << command_ << "\" failed: "
<< strerror(errno) << endl;
+ _exit(1);
}
#else
- pid_t cpid = spawnvp(P_SESSION|P_DEFAULT|P_MINIMIZE|P_BACKGROUND,
- syscmd, argv);
+ pid_t const cpid = spawnvp(P_SESSION|P_DEFAULT|P_MINIMIZE|P_BACKGROUND,
+ argv[0], argv);
#endif
- if (cpid < 0) { // error
- lyxerr << "Could not fork: "
- << strerror(errno) << endl;
+ if (cpid < 0) {
+ // Error.
+ lyxerr << "Could not fork: " << strerror(errno) << endl;
+ }
+
+ // Clean-up.
+ for (int i = 0; i < MAX_ARGV; ++i) {
+ if (argv[i] == 0)
+ break;
+ delete [] argv[i];
}
return cpid;
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