X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fexternaltask.cpp;h=257d1318fb22a42d31a5e2ed04e95424cb0a80ae;hb=4b075b4a7ed921be62740c302edeebcd8b06ca29;hp=24716662804528fcdae50421511379fd576b6d57;hpb=338eefb513953ae55e8e3614c009c242ba8ad74e;p=builder.git

diff --git a/source/externaltask.cpp b/source/externaltask.cpp
index 2471666..257d131 100644
--- a/source/externaltask.cpp
+++ b/source/externaltask.cpp
@@ -1,58 +1,191 @@
 #include <cstdlib>
+#include <unistd.h>
 #include <sys/wait.h>
 #include <msp/fs/dir.h>
+#include <msp/io/console.h>
+#include <msp/io/file.h>
 #include <msp/io/print.h>
+#include <msp/time/units.h>
 #include "externaltask.h"
 
 using namespace std;
 using namespace Msp;
 
-ExternalTask::ExternalTask(const vector<string> &argv, const FS::Path &work_dir):
-	pid(-1),
-	exit_code(-1)
+ExternalTask::ExternalTask(const Arguments &a, const FS::Path &wd):
+	argv(a),
+	work_dir(wd),
+	process(0),
+	exit_code(-1),
+	stdout_action(PASSTHROUGH),
+	stderr_action(PASSTHROUGH),
+	capture_pipe(0)
 {
-	if((pid = fork()))
+	if(argv.empty())
+		throw invalid_argument("ExternalTask::ExternalTask");
+}
+
+ExternalTask::~ExternalTask()
+{
+	delete capture_pipe;
+}
+
+string ExternalTask::get_command() const
+{
+	string cmd;
+	for(vector<string>::const_iterator i=argv.begin(); i!=argv.end(); ++i)
 	{
-		if(pid==-1)
-			exit_code = 1;
-		else
-			exit_code = 0;
+		if(i!=argv.begin())
+			cmd += ' ';
+
+		for(string::const_iterator j=i->begin(); j!=i->end(); ++j)
+		{
+			if(*j=='"' || *j=='\'' || *j==' ' || *j=='\\' || *j=='&')
+				cmd += '\\';
+			cmd += *j;
+		}
+	}
+
+	if(!stdin_file.empty())
+	{
+		cmd += " <";
+		cmd += stdin_file.str();
+	}
+
+	if(stdout_action==REDIRECT)
+	{
+		cmd += " >";
+		cmd += stdout_file.str();
 	}
-	else
+
+	return cmd;
+}
+
+void ExternalTask::start()
+{
+	IO::File *devnull = 0;
+	IO::File *infile = 0;
+	IO::File *outfile = 0;
+
+	prepare();
+
+	process = new Process;
+
+	if(stdout_action==IGNORE || stderr_action==IGNORE)
+	{
+		devnull = new IO::File("/dev/null", IO::M_WRITE);
+		if(stdout_action==IGNORE)
+			process->redirect_cout(*devnull);
+		if(stderr_action==IGNORE)
+			process->redirect_cerr(*devnull);
+	}
+
+	if(stdout_action==REDIRECT)
+	{
+		outfile = new IO::File((work_dir/stdout_file).str(), IO::M_WRITE);
+		process->redirect_cout(*outfile);
+	}
+
+	if(stdout_action==CAPTURE || stderr_action==CAPTURE)
 	{
-		vector<const char *> cargv(argv.size()+1);
-		for(unsigned i=0; i<argv.size(); ++i)
-			cargv[i] = argv[i].c_str();
-		cargv.back() = 0;
+		capture_pipe = new IO::Pipe;
+		if(stdout_action==CAPTURE)
+			process->redirect_cout(*capture_pipe);
+		if(stderr_action==CAPTURE)
+			process->redirect_cerr(*capture_pipe);
+	}
 
-		if(!work_dir.empty())
-			FS::chdir(work_dir);
-		execvp(cargv.front(), const_cast<char *const *>(&cargv.front()));
-		IO::print("Couldn't execute %s\n", argv.front());
-		exit(1);
+	if(!stdin_file.empty())
+	{
+		infile = new IO::File((work_dir/stdin_file).str());
+		process->redirect_cin(*infile);
 	}
+
+	if(!work_dir.empty())
+		process->set_working_directory(work_dir);
+
+	Process::Arguments args(argv.begin()+1, argv.end());
+	process->execute(argv.front(), args);
+	if(capture_pipe)
+		capture_pipe->set_mode(IO::M_READ);
+
+	delete devnull;
+	delete infile;
+	delete outfile;
 }
 
 Task::Status ExternalTask::check()
 {
-	if(pid>0)
+	return do_wait(false);
+}
+
+Task::Status ExternalTask::wait()
+{
+	return do_wait(true);
+}
+
+Task::Status ExternalTask::do_wait(bool block)
+{
+	if(process)
 	{
-		int status;
-		if(waitpid(pid, &status, WNOHANG)==pid)
+		if(process->wait(block))
 		{
-			if(WIFEXITED(status))
-				exit_code = WEXITSTATUS(status);
-			else if(WIFSIGNALED(status))
-				exit_code = 256+WTERMSIG(status);
-			else
-				exit_code = 1025;
-			pid = 0;
+			exit_code = process->get_exit_code();
+			delete process;
+			process = 0;
+		}
 
-			signal_finished.emit(!exit_code);
+		// Do this after waiting to avoid a race condition
+		while(capture_pipe && IO::poll(*capture_pipe, IO::P_INPUT, Time::zero))
+		{
+			char buf[1024];
+			unsigned len = capture_pipe->read(buf, sizeof(buf));
+			if(len)
+				output.append(buf, len);
+			else
+				break;
 		}
-		else
+
+		if(process)
 			return RUNNING;
+		else
+			signal_finished.emit(!exit_code);
 	}
 
 	return exit_code ? ERROR : SUCCESS;
 }
+
+void ExternalTask::set_stdin(const FS::Path &f)
+{
+	stdin_file = f;
+}
+
+void ExternalTask::set_stdout(StreamAction a)
+{
+	if(a==REDIRECT)
+		throw invalid_argument("ExternalTask::set_stdout");
+	stdout_action = a;
+}
+
+void ExternalTask::set_stdout(const FS::Path &f)
+{
+	stdout_action = REDIRECT;
+	stdout_file = f;
+}
+
+void ExternalTask::set_stderr(StreamAction a)
+{
+	if(a==REDIRECT)
+		throw invalid_argument("ExternalTask::set_stdout");
+	stderr_action = a;
+}
+
+string ExternalTask::run_and_capture_output(const Arguments &argv, const FS::Path &wd)
+{
+	ExternalTask task(argv, wd);
+	task.set_stdout(CAPTURE);
+	task.set_stderr(IGNORE);
+	task.start();
+	if(task.wait()!=SUCCESS)
+		throw runtime_error(format("%s failed", argv.front()));
+	return task.get_output();
+}