This is an automated email from the git hooks/post-receive script. x2go pushed a commit to branch bugfix/osx in repository x2goclient. commit 300acf1106a374ff8e7769109c35825561448ea6 Author: Mihai Moldovan <ionic@ionic.de> Date: Wed Mar 18 01:04:33 2015 +0100 x2goclient.cpp: don't start the UNIX cleanup helper process right after forking. Introduce a new command line option --unixhelper and re-execute the main binary with this new option to indicate that the UNIX cleanup helper tool is requested. It is necessary to call exec() after fork on virtually all operating system, especially on OS X. --- debian/changelog | 5 ++++ src/x2goclient.cpp | 65 ++++++++++++++++++++++++++++++++++++++++++++-------- 2 files changed, 60 insertions(+), 10 deletions(-) diff --git a/debian/changelog b/debian/changelog index bda358d..7cba924 100644 --- a/debian/changelog +++ b/debian/changelog @@ -59,6 +59,11 @@ x2goclient (4.0.4.1-0x2go1) UNRELEASED; urgency=low and we certainly do not need to fork to force it to succeed. Whether we are a process group leader already or become one doesn't matter, if the end result is that we are process group leader. + - x2goclient.cpp: don't start the UNIX cleanup helper process right after + forking, but introduce a new command line option --unixhelper and + re-execute the main binary with this new option to indicate that the + UNIX cleanup helper tool is requested. It is necessary to call exec() + after fork on virtually all operating system, especially on OS X. -- X2Go Release Manager <git-admin@x2go.org> Tue, 26 May 2015 21:42:09 +0200 diff --git a/src/x2goclient.cpp b/src/x2goclient.cpp index f7f7c81..2aff41f 100644 --- a/src/x2goclient.cpp +++ b/src/x2goclient.cpp @@ -22,6 +22,10 @@ #include <cstring> #include <cerrno> #include <cstdlib> +#include <string> +#include <algorithm> +#include <cctype> +#include <vector> #include "unixhelper.h" #include "ongetpass.h" @@ -38,7 +42,28 @@ int fork_helper (int argc, char **argv) { /* Child. */ if (0 == tmp_pid) { /* Starting unixhelper. */ - return (unixhelper::unix_cleanup ()); + std::vector<std::string> new_argv; + new_argv.push (std::string (argv[0])); + new_argv.push ("--unixhelper"); + + std::vector<const char *> new_argv_c_str; + for (const_iterator it = new_argv.begin (); it != new_argv.end (); ++it) { + new_argv_c_str.push ((*it).c_str ()); + } + new_argv_c_str.push (""); + + if (0 != execv (new_argv_c_str.data (), new_argv_c_str.data ())) { + std::cerr << "Failed to re-execute process as UNIX cleanup helper tool: " << std::strerror (errno) << "\n" + << "Terminating and killing parent." << "\n" + << "Please report a bug, refer to this documentation: http://wiki.x2go.org/doku.php/wiki:bugs" << std::endl; + + pid_t parent_pid = getppid (); + if (0 != kill (parent_pid, SIGTERM)) { + std::cerr << "Failed to kill parent process: " << std::strerror (errno) << std::endl; + } + + std::exit (EXIT_FAILURE); + } /* Anything here shall be unreachable. */ } @@ -59,15 +84,35 @@ int fork_helper (int argc, char **argv) { int main (int argc, char **argv) { #ifdef Q_OS_UNIX - /* - * setsid() may succeed and we become a session and process - * group leader, or it may fail indicating that we already - * are a process group leader. Either way is fine. - */ - setsid (); - - /* We should be process group leader by now. */ - return (fork_helper (argc, argv)); + /* Scan program arguments for --unixhelper flag. */ + bool unix_helper_request = 0; + for (int i = 0; i < argc; ++i) { + std::string cur_arg (argv[i]); + + /* Make the current argument lowercase. */ + std::transform (cur_arg.begin (), cur_arg.end (), cur_arg.begin (), std::tolower); + + if ((!cur_arg.empty ()) && (cur_arg.compare ("--unixhelper"))) { + unix_helper_request = 1; + break; + } + } + + if (unix_helper_request) { + /* We were instructed to start as the UNIX cleanup helper tool. */ + return (unixhelper::unix_cleanup ()); + } + else { + /* + * setsid() may succeed and we become a session and process + * group leader, or it may fail indicating that we already + * are a process group leader. Either way is fine. + */ + setsid (); + + /* We should be process group leader by now. */ + return (fork_helper (argc, argv)); + } #else /* defined (Q_OS_UNIX) */ return (wrap_x2go_main (argc, argv)); #endif /* defined (Q_OS_UNIX) */ -- Alioth's /srv/git/code.x2go.org/x2goclient.git//..//_hooks_/post-receive-email on /srv/git/code.x2go.org/x2goclient.git