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//
// FLUID main entry for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2021 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
#include "shell_command.h"
#include "fluid.h"
#include "alignment_panel.h"
#include <FL/Fl_Double_Window.H>
#include <FL/fl_message.H>
#include <errno.h>
static Fl_Process s_proc;
/** \class Fl_Process
\todo Explain.
*/
Fl_Process::Fl_Process() {
_fpt= NULL;
}
Fl_Process::~Fl_Process() {
if (_fpt) close();
}
// FIXME: popen needs the UTF-8 equivalent fl_popen
// portable open process:
FILE * Fl_Process::popen(const char *cmd, const char *mode) {
#if defined(_WIN32) && !defined(__CYGWIN__)
// PRECONDITIONS
if (!mode || !*mode || (*mode!='r' && *mode!='w') ) return NULL;
if (_fpt) close(); // close first before reuse
ptmode = *mode;
pin[0] = pin[1] = pout[0] = pout[1] = perr[0] = perr[1] = INVALID_HANDLE_VALUE;
// stderr to stdout wanted ?
int fusion = (strstr(cmd,"2>&1") !=NULL);
// Create windows pipes
if (!createPipe(pin) || !createPipe(pout) || (!fusion && !createPipe(perr) ) )
return freeHandles(); // error
// Initialize Startup Info
ZeroMemory(&si, sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
si.dwFlags = STARTF_USESTDHANDLES;
si.hStdInput = pin[0];
si.hStdOutput = pout[1];
si.hStdError = fusion ? pout[1] : perr [1];
if ( CreateProcess(NULL, (LPTSTR) cmd,NULL,NULL,TRUE,
DETACHED_PROCESS,NULL,NULL, &si, &pi)) {
// don't need theses handles inherited by child process:
clean_close(pin[0]); clean_close(pout[1]); clean_close(perr[1]);
HANDLE & h = *mode == 'r' ? pout[0] : pin[1];
_fpt = _fdopen(_open_osfhandle((fl_intptr_t) h,_O_BINARY),mode);
h= INVALID_HANDLE_VALUE; // reset the handle pointer that is shared
// with _fpt so we don't free it twice
}
if (!_fpt) freeHandles();
return _fpt;
#else
_fpt=::popen(cmd,mode);
return _fpt;
#endif
}
int Fl_Process::close() {
#if defined(_WIN32) && !defined(__CYGWIN__)
if (_fpt) {
fclose(_fpt);
clean_close(perr[0]);
clean_close(pin[1]);
clean_close(pout[0]);
_fpt = NULL;
return 0;
}
return -1;
#else
int ret = ::pclose(_fpt);
_fpt=NULL;
return ret;
#endif
}
// non-null if file is open
FILE *Fl_Process::desc() const {
return _fpt;
}
char *Fl_Process::get_line(char * line, size_t s) const {
return _fpt ? fgets(line, (int)s, _fpt) : NULL;
}
// returns fileno(FILE*):
// (file must be open, i.e. _fpt must be non-null)
// *FIXME* we should find a better solution for the 'fileno' issue
// non null if file is open
int Fl_Process::get_fileno() const {
#ifdef _MSC_VER
return _fileno(_fpt); // suppress MSVC warning
#else
return fileno(_fpt);
#endif
}
#if defined(_WIN32) && !defined(__CYGWIN__)
bool Fl_Process::createPipe(HANDLE * h, BOOL bInheritHnd) {
SECURITY_ATTRIBUTES sa;
sa.nLength = sizeof(sa);
sa.lpSecurityDescriptor = NULL;
sa.bInheritHandle = bInheritHnd;
return CreatePipe (&h[0],&h[1],&sa,0) ? true : false;
}
FILE *Fl_Process::freeHandles() {
clean_close(pin[0]); clean_close(pin[1]);
clean_close(pout[0]); clean_close(pout[1]);
clean_close(perr[0]); clean_close(perr[1]);
return NULL; // convenient for error management
}
void Fl_Process::clean_close(HANDLE& h) {
if (h!= INVALID_HANDLE_VALUE) CloseHandle(h);
h = INVALID_HANDLE_VALUE;
}
#endif
// Shell command support...
static bool prepare_shell_command(const char * &command) { // common pre-shell command code all platforms
shell_window->hide();
if (s_proc.desc()) {
fl_alert("Previous shell command still running!");
return false;
}
if ((command = shell_command_input->value()) == NULL || !*command) {
fl_alert("No shell command entered!");
return false;
}
if (shell_savefl_button->value()) {
save_cb(0, 0);
}
if (shell_writecode_button->value()) {
write_code_files();
}
if (shell_writemsgs_button->value()) {
write_strings_cb(0, 0);
}
return true;
}
// Support the full piped shell command...
void shell_pipe_cb(FL_SOCKET, void*) {
char line[1024]=""; // Line from command output...
if (s_proc.get_line(line, sizeof(line)) != NULL) {
// Add the line to the output list...
shell_run_terminal->append(line);
} else {
// End of file; tell the parent...
Fl::remove_fd(s_proc.get_fileno());
s_proc.close();
shell_run_terminal->append("... END SHELL COMMAND ...\n");
}
}
void do_shell_command(Fl_Return_Button*, void*) {
const char *command=NULL; // Command to run
if (!prepare_shell_command(command)) return;
// Show the output window and clear things...
shell_run_terminal->text("");
shell_run_terminal->append(command);
shell_run_terminal->append("\n");
shell_run_window->label("Shell Command Running...");
if (s_proc.popen((char *)command) == NULL) {
fl_alert("Unable to run shell command: %s", strerror(errno));
return;
}
shell_run_button->deactivate();
Fl_Preferences pos(fluid_prefs, "shell_run_Window_pos");
int x, y, w, h;
pos.get("x", x, -1);
pos.get("y", y, 0);
pos.get("w", w, 640);
pos.get("h", h, 480);
if (x!=-1) {
shell_run_window->resize(x, y, w, h);
}
shell_run_window->show();
Fl::add_fd(s_proc.get_fileno(), shell_pipe_cb);
while (s_proc.desc()) Fl::wait();
shell_run_button->activate();
shell_run_window->label("Shell Command Complete");
fl_beep();
while (shell_run_window->shown()) Fl::wait();
}
/**
Show a dialog box to run an external shell command.
*/
void show_shell_window() {
shell_window->hotspot(shell_command_input);
shell_window->show();
}
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