Mercurial > hg > octave-nkf
view src/main.in.cc @ 19183:a66548dc07b0 stable release-3-8-2
Version 3.8.2 released.
* configure.ac (OCTAVE_VERSION): Now 3.8.2.
(OCTAVE_MINOR_VERSION): Now 2.
(OCTAVE_RELEASE_DATE): Set to 2014-06-06.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Thu, 07 Aug 2014 11:41:28 -0400 |
parents | f1ee47866e6b |
children | 87d96a7d50e0 |
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// %NO_EDIT_WARNING% /* Copyright (C) 2012-2013 John W. Eaton This file is part of Octave. Octave 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 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ // NOTE: This program is supposed to be a small wrapper that exists // primarily to give up the controlling TTY and then exec Octave with // its GUI. It may also execute Octave without the GUI or the command // line version of Octave that is not linked with GUI libraries. So // that it remains small, it should NOT depend on or be linked with // liboctave or libinterp. #ifdef HAVE_CONFIG_H #include <config.h> #endif #include <cstdlib> #include <cstring> #include <algorithm> #include <iostream> #include <string> #include <sys/types.h> #include <unistd.h> #ifndef OCTAVE_VERSION #define OCTAVE_VERSION %OCTAVE_VERSION% #endif #ifndef OCTAVE_ARCHLIBDIR #define OCTAVE_ARCHLIBDIR %OCTAVE_ARCHLIBDIR% #endif #ifndef OCTAVE_BINDIR #define OCTAVE_BINDIR %OCTAVE_BINDIR% #endif #ifndef OCTAVE_PREFIX #define OCTAVE_PREFIX %OCTAVE_PREFIX% #endif #include "shared-fcns.h" #include <cstdlib> #if defined (OCTAVE_USE_WINDOWS_API) #include <windows.h> #elif defined (HAVE_FRAMEWORK_CARBON) #include <Carbon/Carbon.h> #elif defined (HAVE_X_WINDOWS) #include <X11/Xlib.h> #endif bool display_available (std::string& err_msg) { bool dpy_avail = false; err_msg = ""; #if defined (OCTAVE_USE_WINDOWS_API) HDC hdc = GetDC (0); if (hdc) dpy_avail = true; else err_msg = "no graphical display found"; #elif defined (HAVE_FRAMEWORK_CARBON) CGDirectDisplayID display = CGMainDisplayID (); if (display) dpy_avail = true; else err_msg = "no graphical display found"; #elif defined (HAVE_X_WINDOWS) const char *display_name = getenv ("DISPLAY"); if (display_name && *display_name) { Display *display = XOpenDisplay (display_name); if (display) { Screen *screen = DefaultScreenOfDisplay (display); if (! screen) err_msg = "X11 display has no default screen"; XCloseDisplay (display); dpy_avail = true; } else err_msg = "unable to open X11 DISPLAY"; } else err_msg = "X11 DISPLAY environment variable not set"; #else err_msg = "no graphical display found"; #endif return dpy_avail; } #if (defined (HAVE_OCTAVE_GUI) \ && ! defined (__WIN32__) || defined (__CYGWIN__)) #include <signal.h> #include <fcntl.h> // This is a liboctave header, but it doesn't include any other Octave // headers or declare any functions that are defined in liboctave. #include "syswait.h" typedef void sig_handler (int); // Forward signals to the GUI process. static pid_t gui_pid = 0; static int caught_signal = -1; static void gui_driver_sig_handler (int sig) { if (gui_pid > 0) caught_signal = sig; } static sig_handler * octave_set_signal_handler (int sig, sig_handler *handler) { struct sigaction act, oact; act.sa_handler = handler; act.sa_flags = 0; gnulib::sigemptyset (&act.sa_mask); gnulib::sigemptyset (&oact.sa_mask); gnulib::sigaction (sig, &act, &oact); return oact.sa_handler; } static void install_signal_handlers (void) { #ifdef SIGINT octave_set_signal_handler (SIGINT, gui_driver_sig_handler); #endif #ifdef SIGBREAK octave_set_signal_handler (SIGBREAK, gui_driver_sig_handler); #endif #ifdef SIGABRT octave_set_signal_handler (SIGABRT, gui_driver_sig_handler); #endif #ifdef SIGALRM octave_set_signal_handler (SIGALRM, gui_driver_sig_handler); #endif #ifdef SIGBUS octave_set_signal_handler (SIGBUS, gui_driver_sig_handler); #endif // SIGCHLD // SIGCLD // SIGCONT #ifdef SIGEMT octave_set_signal_handler (SIGEMT, gui_driver_sig_handler); #endif #ifdef SIGFPE octave_set_signal_handler (SIGFPE, gui_driver_sig_handler); #endif #ifdef SIGHUP octave_set_signal_handler (SIGHUP, gui_driver_sig_handler); #endif #ifdef SIGILL octave_set_signal_handler (SIGILL, gui_driver_sig_handler); #endif // SIGINFO // SIGINT #ifdef SIGIOT octave_set_signal_handler (SIGIOT, gui_driver_sig_handler); #endif #ifdef SIGLOST octave_set_signal_handler (SIGLOST, gui_driver_sig_handler); #endif #ifdef SIGPIPE octave_set_signal_handler (SIGPIPE, gui_driver_sig_handler); #endif #ifdef SIGPOLL octave_set_signal_handler (SIGPOLL, gui_driver_sig_handler); #endif // SIGPROF // SIGPWR #ifdef SIGQUIT octave_set_signal_handler (SIGQUIT, gui_driver_sig_handler); #endif #ifdef SIGSEGV octave_set_signal_handler (SIGSEGV, gui_driver_sig_handler); #endif // SIGSTOP #ifdef SIGSYS octave_set_signal_handler (SIGSYS, gui_driver_sig_handler); #endif #ifdef SIGTERM octave_set_signal_handler (SIGTERM, gui_driver_sig_handler); #endif #ifdef SIGTRAP octave_set_signal_handler (SIGTRAP, gui_driver_sig_handler); #endif // SIGTSTP // SIGTTIN // SIGTTOU // SIGURG #ifdef SIGUSR1 octave_set_signal_handler (SIGUSR1, gui_driver_sig_handler); #endif #ifdef SIGUSR2 octave_set_signal_handler (SIGUSR2, gui_driver_sig_handler); #endif #ifdef SIGVTALRM octave_set_signal_handler (SIGVTALRM, gui_driver_sig_handler); #endif #ifdef SIGIO octave_set_signal_handler (SIGIO, gui_driver_sig_handler); #endif // SIGWINCH #ifdef SIGXCPU octave_set_signal_handler (SIGXCPU, gui_driver_sig_handler); #endif #ifdef SIGXFSZ octave_set_signal_handler (SIGXFSZ, gui_driver_sig_handler); #endif } static bool have_controlling_terminal (void) { int retval = false; #if defined (HAVE_CTERMID) const char *ctty = ctermid (0); #else const char *ctty = "/dev/tty"; #endif int fd = gnulib::open (ctty, O_RDWR, 0); if (fd >= 0) { gnulib::close (fd); retval = true; } return retval; } #endif static std::string get_octave_bindir (void) { // Accept value from the environment literally, but substitute // OCTAVE_HOME in the configuration value OCTAVE_BINDIR in case Octave // has been relocated to some installation directory other than the // one originally configured. std::string obd = octave_getenv ("OCTAVE_BINDIR"); return obd.empty () ? subst_octave_home (std::string (OCTAVE_BINDIR)) : obd; } static std::string get_octave_archlibdir (void) { // Accept value from the environment literally, but substitute // OCTAVE_HOME in the configuration value OCTAVE_ARCHLIBDIR in case // Octave has been relocated to some installation directory other than // the one originally configured. std::string dir = octave_getenv ("OCTAVE_ARCHLIBDIR"); return dir.empty () ? subst_octave_home (std::string (OCTAVE_ARCHLIBDIR)) : dir; } // Adapted from libtool wrapper. #if defined (__WIN32__) && ! defined (__CYGWIN__) /* Prepares an argument vector before calling spawn(). Note that spawn() does not by itself call the command interpreter (getenv ("COMSPEC") != NULL ? getenv ("COMSPEC") : ({ OSVERSIONINFO v; v.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); GetVersionEx(&v); v.dwPlatformId == VER_PLATFORM_WIN32_NT; }) ? "cmd.exe" : "command.com"). Instead it simply concatenates the arguments, separated by ' ', and calls CreateProcess(). We must quote the arguments since Win32 CreateProcess() interprets characters like ' ', '\t', '\\', '"' (but not '<' and '>') in a special way: - Space and tab are interpreted as delimiters. They are not treated as delimiters if they are surrounded by double quotes: "...". - Unescaped double quotes are removed from the input. Their only effect is that within double quotes, space and tab are treated like normal characters. - Backslashes not followed by double quotes are not special. - But 2*n+1 backslashes followed by a double quote become n backslashes followed by a double quote (n >= 0): \" -> " \\\" -> \" \\\\\" -> \\" */ #define SHELL_SPECIAL_CHARS "\"\\ \001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037" #define SHELL_SPACE_CHARS " \001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037" char ** prepare_spawn (char **argv) { size_t argc; char **new_argv; size_t i; /* Count number of arguments. */ for (argc = 0; argv[argc] != NULL; argc++) ; /* Allocate new argument vector. */ new_argv = new char* [argc + 1]; /* Put quoted arguments into the new argument vector. */ for (i = 0; i < argc; i++) { const char *string = argv[i]; if (string[0] == '\0') new_argv[i] = strdup ("\"\""); else if (strpbrk (string, SHELL_SPECIAL_CHARS) != NULL) { int quote_around = (strpbrk (string, SHELL_SPACE_CHARS) != NULL); size_t length; unsigned int backslashes; const char *s; char *quoted_string; char *p; length = 0; backslashes = 0; if (quote_around) length++; for (s = string; *s != '\0'; s++) { char c = *s; if (c == '"') length += backslashes + 1; length++; if (c == '\\') backslashes++; else backslashes = 0; } if (quote_around) length += backslashes + 1; quoted_string = new char [length + 1]; p = quoted_string; backslashes = 0; if (quote_around) *p++ = '"'; for (s = string; *s != '\0'; s++) { char c = *s; if (c == '"') { unsigned int j; for (j = backslashes + 1; j > 0; j--) *p++ = '\\'; } *p++ = c; if (c == '\\') backslashes++; else backslashes = 0; } if (quote_around) { unsigned int j; for (j = backslashes; j > 0; j--) *p++ = '\\'; *p++ = '"'; } *p = '\0'; new_argv[i] = quoted_string; } else new_argv[i] = (char *) string; } new_argv[argc] = NULL; return new_argv; } #endif // __WIN32__ && ! __CYGWIN__ static int octave_exec (const std::string& file, char **argv) { #if defined (__WIN32__) && ! defined (__CYGWIN__) argv = prepare_spawn (argv); return _spawnv (_P_WAIT, file.c_str (), argv); #else execv (file.c_str (), argv); std::cerr << "octave: failed to exec '" << file << "'" << std::endl; return 1; #endif } static char * strsave (const char *s) { if (! s) return 0; int len = strlen (s); char *tmp = new char [len+1]; tmp = strcpy (tmp, s); return tmp; } int main (int argc, char **argv) { int retval = 0; bool start_gui = false; bool gui_libs = false; std::string octave_bindir = get_octave_bindir (); std::string octave_archlibdir = get_octave_archlibdir (); std::string file = octave_bindir + dir_sep_char + "octave-cli-" OCTAVE_VERSION;; char **new_argv = new char * [argc + 1]; int k = 1; bool warn_display = true; for (int i = 1; i < argc; i++) { if (! strcmp (argv[i], "--force-gui")) { start_gui = true; gui_libs = true; #if defined (HAVE_OCTAVE_GUI) // The Octave version number is already embedded in the // octave_archlibdir directory name so we don't need to // append it to the octave-gui file name. file = octave_archlibdir + dir_sep_char + "octave-gui"; #else file = octave_bindir + dir_sep_char + "octave-cli-" OCTAVE_VERSION; #endif new_argv[k++] = argv[i]; } else if (! strcmp (argv[i], "--no-gui-libs")) { // Run the version of Octave that is not linked with any GUI // libraries. It may not be possible to do plotting or any // ui* calls, but it will be a little faster to start and // require less memory. Don't pass the --no-gui-libs option // on as that option is not recognized by Octave. // This is the default for 3.8 release. } else if (! strcmp (argv[i], "--no-gui")) { // If we see this option, then we can just exec octave; we // don't have to create a child process and wait for it to // exit. But do exec "octave-gui", not "octave-cli", because // even if the --no-gui option is given, we may be asked to do // some plotting or ui* calls. // This option calls the cli executable for the 3.8 release. } else if (! strcmp (argv[i], "--silent") || ! strcmp (argv[i], "-q") || ! strcmp (argv[i], "--quiet")) { warn_display = false; new_argv[k++] = argv[i]; } else new_argv[k++] = argv[i]; } new_argv[k] = 0; if (gui_libs || start_gui) { std::string display_check_err_msg; if (! display_available (display_check_err_msg)) { start_gui = false; gui_libs = false; file = octave_bindir + dir_sep_char + "octave-cli-" OCTAVE_VERSION; if (warn_display) { std::cerr << "octave: " << display_check_err_msg << std::endl; std::cerr << "octave: disabling GUI features" << std::endl; } } } #if defined (__WIN32__) && ! defined (__CYGWIN__) file += ".exe"; #endif new_argv[0] = strsave (file.c_str ()); #if (defined (HAVE_OCTAVE_GUI) \ && ! defined (__WIN32__) || defined (__CYGWIN__)) if (gui_libs && start_gui && have_controlling_terminal ()) { install_signal_handlers (); gui_pid = fork (); if (gui_pid < 0) { std::cerr << "octave: fork failed!" << std::endl; retval = 1; } else if (gui_pid == 0) { // Child. if (setsid () < 0) { std::cerr << "octave: error calling setsid!" << std::endl; retval = 1; } retval = octave_exec (file, new_argv); } else { // Parent. Forward signals to child while waiting for it to exit. int status; while (true) { WAITPID (gui_pid, &status, 0); if (caught_signal > 0) { int sig = caught_signal; caught_signal = -1; kill (gui_pid, sig); } else if (WIFEXITED (status)) { retval = WEXITSTATUS (status); break; } else if (WIFSIGNALLED (status)) { std::cerr << "octave exited with signal " << WTERMSIG (status) << std::endl; break; } } } } else retval = octave_exec (file, new_argv); #else retval = octave_exec (file, new_argv); #endif return retval; } /*! @mainpage Source code documentation for GNU Octave GNU Octave is a high-level language, primarily intended for numerical computations. It provides a convenient interactive command line interface for solving linear and nonlinear problems numerically, and for performing other numerical experiments. It may also be used as a batch-oriented language for data processing. GNU Octave is free software. You may redistribute it and/or modify it under the terms of the <a href="http://www.gnu.org/licenses/">GNU General Public License</a> as published by the Free Software Foundation. This is the developer documentation for Octave's own source code. It is intended to help for hacking Octave. It may also be useful for understanding the Octave API when writing your own .oct files. */