manually jump forward state of system_exec files to avoid various cherry-picking-related problems during merge with ardour

libs/ardour/ardour/system_exec.h

@@ -32,6 +32,7 @@ class LIBARDOUR_API SystemExec
 public:
 	SystemExec (std::string c, std::string a = "");
 	SystemExec (std::string c, char ** a);
+        SystemExec (std::string c, const std::map<char, std::string> subs);
 	~SystemExec ();
 
 	int start (int stderr_mode = 1) {

libs/ardour/export_handler.cc

@@ -38,9 +38,7 @@
 #include "ardour/export_filename.h"
 #include "ardour/session_metadata.h"
 #include "ardour/soundcloud_upload.h"
-#include "pbd/openuri.h"
+#include "ardour/system_exec.h"
-#include "pbd/basename.h"
-#include "pbd/system_exec.h"
 
 #include "i18n.h"
 
@@ -297,18 +295,18 @@ ExportHandler::finish_timespan ()
 	while (config_map.begin() != timespan_bounds.second) {
 
 		ExportFormatSpecPtr fmt = config_map.begin()->second.format;
-		std::string filepath = config_map.begin()->second.filename->get_path(fmt);
+		std::string filename = config_map.begin()->second.filename->get_path(fmt);
 
 		if (fmt->with_cue()) {
-			export_cd_marker_file (current_timespan, fmt, filepath, CDMarkerCUE);
+			export_cd_marker_file (current_timespan, fmt, filename, CDMarkerCUE);
 		} 
 
 		if (fmt->with_toc()) {
-			export_cd_marker_file (current_timespan, fmt, filepath, CDMarkerTOC);
+			export_cd_marker_file (current_timespan, fmt, filename, CDMarkerTOC);
                 }
 
 		if (fmt->tag()) {
-			AudiofileTagger::tag_file(filepath, *SessionMetadata::Metadata());
+			AudiofileTagger::tag_file(filename, *SessionMetadata::Metadata());
 		}
 
 		if (!fmt->command().empty()) {
@@ -325,15 +323,14 @@ ExportHandler::finish_timespan ()
 
 			PBD::ScopedConnection command_connection;
 			std::map<char, std::string> subs;
-			subs.insert (std::pair<char, std::string> ('f', filepath));
+			subs.insert (std::pair<char, std::string> ('f', filename));
-			subs.insert (std::pair<char, std::string> ('d', Glib::path_get_dirname(filepath)));
+			subs.insert (std::pair<char, std::string> ('d', Glib::path_get_dirname(filename)));
-			subs.insert (std::pair<char, std::string> ('b', PBD::basename_nosuffix(filepath)));
+			subs.insert (std::pair<char, std::string> ('b', PBD::basename_nosuffix(filename)));
-			subs.insert (std::pair<char, std::string> ('u', upload_username));
+                        subs.insert (std::pair<char, std::string> ('s', session.path ()));
-			subs.insert (std::pair<char, std::string> ('p', upload_password));
+                        subs.insert (std::pair<char, std::string> ('n', session.name ()));
-
 
 			std::cerr << "running command: " << fmt->command() << "..." << std::endl;
-			SystemExec *se = new SystemExec(fmt->command(), subs);
+                        ARDOUR::SystemExec *se = new SystemExec(fmt->command(), subs);
 
 			se->ReadStdout.connect_same_thread(command_connection, boost::bind(&ExportHandler::command_output, this, _1, _2));
 			if (se->start (2) == 0) {
@@ -357,8 +354,8 @@ ExportHandler::finish_timespan ()
 						"uploading %1 - username=%2, password=%3, token=%4",
 						filename, soundcloud_username, soundcloud_password, token) );
 			std::string path = soundcloud_uploader->Upload (
-					filepath,
+					filename,
-					PBD::basename_nosuffix(filepath), // title
+					PBD::basename_nosuffix(filename), // title
 					token,
 					soundcloud_make_public,
 					soundcloud_downloadable,

libs/pbd/pbd/system_exec.h

@@ -42,6 +42,8 @@
 #include <string>
 #include <pthread.h>
 #include <signal.h>
+#include <map>
+
 #ifdef NOPBD  /* unit-test outside ardour */
 #include <sigc++/bind.h>
 #include <sigc++/signal.h>
@@ -94,6 +96,23 @@ class LIBPBD_API SystemExec
 		 *
 		 */
 		SystemExec (std::string c, char ** a);
+
+		/** similar to \ref SystemExec but expects a whole command line, and
+		 * handles some simple escape sequences.
+		 *
+		 * @param command complete command-line to be executed
+		 * @param subs a map of <char, std::string> listing the % substitutions to
+		 *             be made.
+		 *
+		 * creates an argv array from the given command string, splitting into
+		 * parameters at spaces.
+		 * "\ " is non-splitting space, "\\" (and "\" at end of command) as "\",
+		 * for "%<char>", <char> is looked up in subs and the corresponding string
+		 * substituted. "%%" (and "%" at end of command)
+		 * returns an argv array suitable for creating a new SystemExec with
+		 */
+		SystemExec (std::string command, const std::map<char, std::string> subs);
+
 		virtual ~SystemExec ();
 
 		/** fork and execute the given program
@@ -182,6 +201,7 @@ class LIBPBD_API SystemExec
 		int nicelevel; ///< process nice level - defaults to 0
 
 		void make_argp(std::string);
+		void make_argp_escaped(std::string command, const std::map<char, std::string> subs);
 		void make_envp();
 
 		char **argp;
@@ -198,6 +218,7 @@ class LIBPBD_API SystemExec
 #else
 		pid_t pid;
 #endif
+		void init ();
 		pthread_mutex_t write_lock;
 
 		int fdin; ///< file-descriptor for writing to child's STDIN. This variable is identical to pin[1] but also used as status check if the stdin pipe is open: <0 means closed.

libs/pbd/system_exec.cc

@@ -43,7 +43,12 @@
 #include <sys/resource.h>
 #endif
 
+#include <glibmm/miscutils.h>
 
+#define USE_VFORK
+
+#include "pbd/file_utils.h"
+#include "pbd/search_path.h"
 #include "pbd/system_exec.h"
 
 using namespace std;
@@ -149,9 +154,8 @@ static int close_allv(const int except_fds[]) {
 }
 #endif /* not on windows, nor vfork */
 
-
+void
-SystemExec::SystemExec (std::string c, std::string a)
+SystemExec::init ()
-	: cmd(c)
 {
 	pthread_mutex_init(&write_lock, NULL);
 	thread_active=false;
@@ -159,12 +163,19 @@ SystemExec::SystemExec (std::string c, std::string a)
 	pin[1] = -1;
 	nicelevel = 0;
 	envp = NULL;
-	argp = NULL;
 #ifdef PLATFORM_WINDOWS
 	stdinP[0] = stdinP[1] = INVALID_HANDLE_VALUE;
 	stdoutP[0] = stdoutP[1] = INVALID_HANDLE_VALUE;
 	stderrP[0] = stderrP[1] = INVALID_HANDLE_VALUE;
 #endif
+}
+
+SystemExec::SystemExec (std::string c, std::string a)
+	: cmd(c)
+{
+	init ();
+
+	argp = NULL;
 	make_envp();
 	make_argp(a);
 }
@@ -172,16 +183,9 @@ SystemExec::SystemExec (std::string c, std::string a)
 SystemExec::SystemExec (std::string c, char **a)
 	: cmd(c) , argp(a)
 {
-	pthread_mutex_init(&write_lock, NULL);
+	init ();
-	thread_active=false;
+
-	pid = 0;
-	pin[1] = -1;
-	nicelevel = 0;
-	envp = NULL;
 #ifdef PLATFORM_WINDOWS
-	stdinP[0] = stdinP[1] = INVALID_HANDLE_VALUE;
-	stdoutP[0] = stdoutP[1] = INVALID_HANDLE_VALUE;
-	stderrP[0] = stderrP[1] = INVALID_HANDLE_VALUE;
 	make_wargs(a);
 #endif
 	make_envp();
@@ -191,8 +195,17 @@ SystemExec::SystemExec (std::string command, const std::map<char, std::string> s
 {
 	init ();
 	make_argp_escaped(command, subs);
-	cmd = argp[0];
+
-	// cmd = strdup(argp[0]);
+	if (find_file_in_search_path (Searchpath (Glib::getenv ("PATH")), argp[0], cmd)) {
+		// argp[0] exists in $PATH` - set it to the actual path where it was found
+		free (argp[0]);
+		argp[0] = strdup(cmd.c_str ());
+	}
+	// else argp[0] not found in path - leave it as-is, it might be an absolute path
+
+	// Glib::find_program_in_path () is only available in Glib >= 2.28
+	// cmd = Glib::find_program_in_path (argp[0]);
+
 	make_envp();
 }
 
@@ -264,9 +277,6 @@ SystemExec::make_argp_escaped(std::string command, const std::map<char, std::str
 		}
 	}
 	argp[n] = NULL;
-
-	char *p = argp[0];
-	n = 0;
 }
 
 SystemExec::~SystemExec ()
@@ -403,8 +413,7 @@ int
 SystemExec::wait (int options)
 {
 	while (is_running()) {
-		WaitForSingleObject(pid->hProcess, INFINITE);
+		WaitForSingleObject(pid->hProcess, 40);
-		Sleep(20);
 	}
 	return 0;
 }
@@ -412,7 +421,12 @@ SystemExec::wait (int options)
 bool
 SystemExec::is_running ()
 {
-	return pid?true:false;
+	if (!pid) return false;
+	DWORD exit_code;
+	if (GetExitCodeProcess(pid->hProcess, &exit_code)) {
+		if (exit_code == STILL_ACTIVE) return true;
+	}
+	return false;
 }
 
 int
@@ -626,7 +640,7 @@ SystemExec::terminate ()
 	close_stdin();
 
 	if (pid) {
-		::usleep(50000);
+		::usleep(200000);
 		sched_yield();
 		wait(WNOHANG);
 	}
@@ -637,7 +651,7 @@ SystemExec::terminate ()
 	
 	if (pid) {
 		::kill(pid, SIGTERM);
-		usleep(50000);
+		::usleep(250000);
 		sched_yield();
 		wait(WNOHANG);
 	}
@@ -795,6 +809,10 @@ SystemExec::start (int stderr_mode, const char *vfork_exec_wrapper)
 #else
 	signal(SIGPIPE, SIG_DFL);
 #endif
+	if (!vfork_exec_wrapper) {
+		error << _("Cannot start external process, no vfork wrapper") << endmsg;
+		return -1;
+	}
 
 	int good_fds[2] = { pok[1],  -1 };
 	close_allv(good_fds);
@@ -857,7 +875,16 @@ SystemExec::output_interposer()
 	for (;fcntl(rfd, F_GETFL)!=-1;) {
 		r = read(rfd, buf, sizeof(buf));
 		if (r < 0 && (errno == EINTR || errno == EAGAIN)) {
-			::usleep(1000);
+			fd_set rfds;
+			struct timeval tv;
+			FD_ZERO(&rfds);
+			FD_SET(rfd, &rfds);
+			tv.tv_sec = 0;
+			tv.tv_usec = 10000;
+			int rv = select(1, &rfds, NULL, NULL, &tv);
+			if (rv == -1) {
+				break;
+			}
 			continue;
 		}
 		if (r <= 0) {