+++ /dev/null
-
-// Name : launch_process
-// Author : Chris Koeritz
-/******************************************************************************
-* Copyright (c) 1994-$now By Author. This program is free software; you can *
-* redistribute it and/or modify it under the terms of the GNU General Public *
-* License as published by the Free Software Foundation; either version 2 of *
-* the License or (at your option) any later version. This is online at: *
-* http://www.fsf.org/copyleft/gpl.html *
-* Please send any updates to: fred@gruntose.com *
-\*****************************************************************************/
-
-#include "launch_process.h"
-
-#include <application/windoze_helper.h>
-#include <basis/utf_conversion.h>
-#include <basis/mutex.h>
-#include <configuration/application_configuration.h>
-#include <loggers/critical_events.h>
-#include <loggers/program_wide_logger.h>
-#include <structures/set.h>
-#include <timely/time_control.h>
-
-#include <stdlib.h>
-#ifdef __UNIX__
- #include <signal.h>
- #include <sys/types.h>
- #include <sys/wait.h>
- #include <unistd.h>
-#endif
-#ifdef __WIN32__
- #include <process.h>
- #include <shellapi.h>
- #include <shlobj.h>
-#endif
-
-//#define DEBUG_LAUNCH_PROCESS
- // uncomment for noisier debugging info.
-
-using namespace basis;
-using namespace configuration;
-using namespace loggers;
-using namespace structures;
-using namespace timely;
-
-#undef LOG
-#define LOG(s) CLASS_EMERGENCY_LOG(program_wide_logger::get(), s);
-
-namespace processes {
-
-//hmmm: some of these should probably be safe statics.
-
-mutex &__process_synchronizer() {
- static mutex __hidden_synch;
- return __hidden_synch;
-}
-
-int_set __our_kids() {
- static int_set __hidden_kids;
- return __hidden_kids;
-}
-
-#ifdef __WIN32__
-bool launch_process::event_poll(MSG &message)
-{
- message.hwnd = 0;
- message.message = 0;
- message.wParam = 0;
- message.lParam = 0;
- if (!PeekMessage(&message, NIL, 0, 0, PM_REMOVE))
- return false;
- TranslateMessage(&message);
- DispatchMessage(&message);
- return true;
-}
-#endif
-
-#define SUPPORT_SHELL_EXECUTE
- // if this is not commented out, then the ShellExecute version of launch_
- // -process() is available. when commented out, ShellExecute is turned off.
- // disabling this support is the most common because the ShellExecute method
- // in win32 was only supported for wk203 and wxp, that is only after
- // windows2000 was already available. since nt and w2k don't support this,
- // we just usually don't mess with it. it didn't answer a single one of our
- // issues on windows vista (wfista) anyway, so it's not helping.
-
-//const int MAXIMUM_COMMAND_LINE = 32 * KILOBYTE;
- // maximum command line that we'll deal with here.
-
-#ifdef __UNIX__
-void launch_process::exiting_child_signal_handler(int sig_num)
-{
- FUNCDEF("exiting_child_signal_handler");
- if (sig_num != SIGCHLD) {
- // uhhh, this seems wrong.
- }
- auto_synchronizer l(__process_synchronizer());
- for (int i = 0; i < __our_kids().length(); i++) {
- int status;
- pid_t exited = waitpid(__our_kids()[i], &status, WNOHANG);
- if ( (exited == -1) || (exited == __our_kids()[i]) ) {
- // negative one denotes an error, which we are going to assume means the
- // process has exited via some other method than our wait. if the value
- // is the same as the process we waited for, that means it exited.
- __our_kids().zap(i, i);
- i--;
- } else if (exited != 0) {
- // zero would be okay; this result we do not understand.
-#ifdef DEBUG_LAUNCH_PROCESS
- LOG(a_sprintf("unknown result %d waiting for process %d", exited, __our_kids()[i]));
-#endif
- }
- }
-}
-#endif
-
-//hmmm: this doesn't seem to account for quoting properly at all?
-char_star_array launch_process::break_line(astring &app, const astring ¶meters)
-{
- FUNCDEF("break_line");
- char_star_array to_return;
- int_array posns;
- int num = 0;
- // find the positions of the spaces and count them.
- for (int j = 0; j < parameters.length(); j++) {
- if (parameters[j] == ' ') {
- num++;
- posns += j;
- }
- }
- // first, add the app name to the list of parms.
- to_return += new char[app.length() + 1];
- app.stuff(to_return[0], app.length());
- int last_posn = 0;
- // now add each space-separated parameter to the list.
- for (int i = 0; i < num; i++) {
- int len = posns[i] - last_posn;
- to_return += new char[len + 1];
- parameters.substring(last_posn, posns[i] - 1).stuff(to_return[i + 1], len);
- last_posn = posns[i] + 1;
- }
- // catch anything left after last separator.
- if (last_posn < parameters.length() - 1) {
- int len = parameters.length() - last_posn;
- to_return += new char[len + 1];
- parameters.substring(last_posn, parameters.length() - 1)
- .stuff(to_return[to_return.last()], len);
- }
- // add the sentinel to the list of strings.
- to_return += NIL;
-#ifdef DEBUG_LAUNCH_PROCESS
- for (int q = 0; to_return[q]; q++) {
- LOG(a_sprintf("%d: %s\n", q, to_return[q]));
- }
-#endif
- // now a special detour; fix the app name to remove quotes, which are
- // not friendly to pass to exec.
- if (app[0] == '"') app.zap(0, 0);
- if (app[app.end()] == '"') app.zap(app.end(), app.end());
- return to_return;
-}
-
-basis::un_int launch_process::run(const astring &app_name_in, const astring &command_line,
- int flag, basis::un_int &child_id)
-{
-#ifdef DEBUG_LAUNCH_PROCESS
- FUNCDEF("run");
-#endif
- child_id = 0;
- astring app_name = app_name_in;
- if (app_name[0] != '"')
- app_name.insert(0, "\"");
- if (app_name[app_name.end()] != '"')
- app_name += "\"";
-#ifdef __UNIX__
- // unix / linux implementation.
- if (flag & RETURN_IMMEDIATELY) {
- // they want to get back right away.
- pid_t kid_pid = fork();
-#ifdef DEBUG_LAUNCH_PROCESS
- LOG(a_sprintf("launch fork returned %d\n", kid_pid));
-#endif
- if (!kid_pid) {
- // this is the child; we now need to launch into what we were asked for.
-#ifdef DEBUG_LAUNCH_PROCESS
- LOG(a_sprintf("process %d execing ", application_configuration::process_id()) + app_name
- + " parms " + command_line + "\n");
-#endif
- char_star_array parms = break_line(app_name, command_line);
- execv(app_name.s(), parms.observe());
- // oops. failed to exec if we got to here.
-#ifdef DEBUG_LAUNCH_PROCESS
- LOG(a_sprintf("child of fork (pid %d) failed to exec, error is ",
- application_configuration::process_id())
- + critical_events::system_error_text(critical_events::system_error())
- + "\n");
-#endif
- exit(0); // leave since this is a failed child process.
- } else {
- // this is the parent. let's see if the launch worked.
- if (kid_pid == -1) {
- // failure.
- basis::un_int to_return = critical_events::system_error();
-#ifdef DEBUG_LAUNCH_PROCESS
- LOG(a_sprintf("parent %d is returning after failing to create, "
- "error is ", application_configuration::process_id())
- + critical_events::system_error_text(to_return)
- + "\n");
-#endif
- return to_return;
- } else {
- // yes, launch worked okay.
- child_id = kid_pid;
- {
- auto_synchronizer l(__process_synchronizer());
- __our_kids() += kid_pid;
- }
- // hook in our child exit signal handler.
- signal(SIGCHLD, exiting_child_signal_handler);
-
-#ifdef DEBUG_LAUNCH_PROCESS
- LOG(a_sprintf("parent %d is returning after successfully "
- "creating %d ", application_configuration::process_id(), kid_pid) + app_name
- + " parms " + command_line + "\n");
-#endif
- return 0;
- }
- }
- } else {
- // assume they want to wait.
- return system((app_name + " " + command_line).s());
- }
-#elif defined(__WIN32__)
-
-//checking on whether we have admin rights for the launch.
-//if (IsUserAnAdmin()) {
-// MessageBox(0, (astring("IS admin with ") + app_name_in + " " + command_line).s(), "launch process", MB_OK);
-//} else {
-// MessageBox(0, (astring("NOT admin for ") + app_name_in + " " + command_line).s(), "launch process", MB_OK);
-//}
-
- PROCESS_INFORMATION process_info;
- ZeroMemory(&process_info, sizeof(PROCESS_INFORMATION));
-
-#ifdef SUPPORT_SHELL_EXECUTE
- if (flag & SHELL_EXECUTE) {
- // new code for using shell execute method--required on vista for proper
- // launching with the right security tokens.
- int show_cmd = 0;
- if (flag & HIDE_APP_WINDOW) {
- // magic that hides a console window for mswindows.
- show_cmd = SW_HIDE;
- } else {
- show_cmd = SW_SHOWNORMAL;
- }
-
- SHELLEXECUTEINFO exec_info;
- ZeroMemory(&exec_info, sizeof(SHELLEXECUTEINFO));
- exec_info.cbSize = sizeof(SHELLEXECUTEINFO);
- exec_info.fMask = SEE_MASK_NOCLOSEPROCESS // get the process info.
- | SEE_MASK_FLAG_NO_UI; // turn off any visible error dialogs.
- exec_info.hwnd = GetDesktopWindow();
-//hmmm: is get desktop window always appropriate?
- to_unicode_persist(temp_verb, "open");
-//does "runas" work on xp also? or anywhere?
- exec_info.lpVerb = temp_verb;
- to_unicode_persist(temp_file, app_name);
- exec_info.lpFile = temp_file;
- to_unicode_persist(temp_parms, command_line);
- exec_info.lpParameters = temp_parms;
- exec_info.nShow = show_cmd;
-// exec_info.hProcess = &process_info;
-
- BOOL worked = ShellExecuteEx(&exec_info);
- if (!worked)
- return critical_events::system_error();
- // copy out the returned process handle.
- process_info.hProcess = exec_info.hProcess;
- process_info.dwProcessId = GetProcessId(exec_info.hProcess);
- } else {
-#endif //shell exec
- // standard windows implementation using CreateProcess.
- STARTUPINFO startup_info;
- ZeroMemory(&startup_info, sizeof(STARTUPINFO));
- startup_info.cb = sizeof(STARTUPINFO);
- int create_flag = 0;
- if (flag & HIDE_APP_WINDOW) {
- // magic that hides a console window for mswindows.
-// version ver = portable::get_OS_version();
-// version vista_version(6, 0);
-// if (ver < vista_version) {
-// // we suspect that this flag is hosing us in vista.
- create_flag = CREATE_NO_WINDOW;
-// }
- }
- astring parms = app_name + " " + command_line;
- bool success = CreateProcess(NIL, to_unicode_temp(parms), NIL, NIL, false,
- create_flag, NIL, NIL, &startup_info, &process_info);
- if (!success)
- return critical_events::system_error();
- // success then, merge back into stream.
-
-#ifdef SUPPORT_SHELL_EXECUTE
- }
-#endif //shell exec
-
- // common handling for CreateProcess and ShellExecuteEx.
- child_id = process_info.dwProcessId;
- basis::un_long retval = 0;
- if (flag & AWAIT_VIA_POLLING) {
- // this type of waiting is done without blocking on the process.
- while (true) {
- MSG msg;
- event_poll(msg);
- // check if the process is gone yet.
- BOOL ret = GetExitCodeProcess(process_info.hProcess, &retval);
- if (!ret) {
- break;
- } else {
- // if they aren't saying it's still active, then we will leave.
- if (retval != STILL_ACTIVE)
- break;
- }
- time_control::sleep_ms(14);
- }
- } else if (flag & AWAIT_APP_EXIT) {
- // they want to wait for the process to exit.
- WaitForInputIdle(process_info.hProcess, INFINITE);
- WaitForSingleObject(process_info.hProcess, INFINITE);
- GetExitCodeProcess(process_info.hProcess, &retval);
- }
- // drop the process and thread handles.
- if (process_info.hProcess)
- CloseHandle(process_info.hProcess);
- if (process_info.hThread)
- CloseHandle(process_info.hThread);
- return (basis::un_int)retval;
-#else
- #pragma error("hmmm: launch_process: no implementation for this OS.")
-#endif
- return 0;
-}
-
-} // namespace.
-
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