Informix fixes (submitted by Roger Gammans)

[wxWidgets.git] / src / unix / utilsunx.cpp

diff --git a/src/unix/utilsunx.cpp b/src/unix/utilsunx.cpp
index d3e1dd7ba81b0d620857018954dbf59b90b0e2b6..deeaa836bab486d1308dd1ef5077855bae05969f 100644 (file)
--- a/src/unix/utilsunx.cpp
+++ b/src/unix/utilsunx.cpp
@@ -20,11 +20,23 @@
 
 #include "wx/intl.h"
 #include "wx/log.h"
 
 #include "wx/intl.h"
 #include "wx/log.h"

+#include "wx/app.h"

 
 #include "wx/utils.h"
 #include "wx/process.h"
 
 #include "wx/utils.h"
 #include "wx/process.h"

+#include "wx/thread.h"

 
 

-#include "wx/unix/execute.h"
+#include "wx/stream.h"
+
+#if wxUSE_GUI
+    #include "wx/unix/execute.h"
+#endif
+
+// SGI signal.h defines signal handler arguments differently depending on
+// whether _LANGUAGE_C_PLUS_PLUS is set or not - do set it
+#if defined(__SGI__) && !defined(_LANGUAGE_C_PLUS_PLUS)
+    #define _LANGUAGE_C_PLUS_PLUS 1
+#endif // SGI hack

 
 #include <stdarg.h>
 #include <dirent.h>
 
 #include <stdarg.h>
 #include <dirent.h>


@@ -40,11 +52,9 @@
 #include <fcntl.h>          // for O_WRONLY and friends
 #include <time.h>           // nanosleep() and/or usleep()
 #include <ctype.h>          // isspace()
 #include <fcntl.h>          // for O_WRONLY and friends
 #include <time.h>           // nanosleep() and/or usleep()
 #include <ctype.h>          // isspace()

+#include <sys/time.h>       // needed for FD_SETSIZE

 
 

-// JACS: needed for FD_SETSIZE
-#include <sys/time.h>
-
-#if HAVE_UNAME
+#ifdef HAVE_UNAME

     #include <sys/utsname.h> // for uname()
 #endif // HAVE_UNAME
 
     #include <sys/utsname.h> // for uname()
 #endif // HAVE_UNAME
 


@@ -64,20 +74,21 @@
         #ifdef __SUN__
             int usleep(unsigned int usec);
         #else // !Sun
         #ifdef __SUN__
             int usleep(unsigned int usec);
         #else // !Sun

-        #ifdef __EMX
-            /* I copied this from the XFree86 diffs. AV. */
-            #define INCL_DOSPROCESS
-            #include <os2.h>
-            void usleep(unsigned long delay)
-            {
-                DosSleep(delay ? (delay/1000l) : 1l);
-            }
-        #else
-            void usleep(unsigned long usec);
-        #endif
+            #ifdef __EMX__
+                /* I copied this from the XFree86 diffs. AV. */
+                #define INCL_DOSPROCESS
+                #include <os2.h>
+                inline void usleep(unsigned long delay)
+                {
+                    DosSleep(delay ? (delay/1000l) : 1l);
+                }
+            #else // !Sun && !EMX
+                void usleep(unsigned long usec);
+            #endif

         #endif // Sun/EMX/Something else
     };
         #endif // Sun/EMX/Something else
     };

-#define HAVE_USLEEP 1
+
+    #define HAVE_USLEEP 1

 #endif // Unices without usleep()
 
 // ============================================================================
 #endif // Unices without usleep()
 
 // ============================================================================


@@ -95,14 +106,14 @@ void wxSleep(int nSecs)
 
 void wxUsleep(unsigned long milliseconds)
 {
 
 void wxUsleep(unsigned long milliseconds)
 {

-#if HAVE_NANOSLEEP
+#if defined(HAVE_NANOSLEEP)

     timespec tmReq;
     timespec tmReq;

-    tmReq.tv_sec = milliseconds / 1000;
+    tmReq.tv_sec = (time_t)(milliseconds / 1000);

     tmReq.tv_nsec = (milliseconds % 1000) * 1000 * 1000;
 
     // we're not interested in remaining time nor in return value
     (void)nanosleep(&tmReq, (timespec *)NULL);
     tmReq.tv_nsec = (milliseconds % 1000) * 1000 * 1000;
 
     // we're not interested in remaining time nor in return value
     (void)nanosleep(&tmReq, (timespec *)NULL);

-#elif HAVE_USLEEP
+#elif defined(HAVE_USLEEP)

     // uncomment this if you feel brave or if you are sure that your version
     // of Solaris has a safe usleep() function but please notice that usleep()
     // is known to lead to crashes in MT programs in Solaris 2.[67] and is not
     // uncomment this if you feel brave or if you are sure that your version
     // of Solaris has a safe usleep() function but please notice that usleep()
     // is known to lead to crashes in MT programs in Solaris 2.[67] and is not


@@ -112,6 +123,9 @@ void wxUsleep(unsigned long milliseconds)
     #endif // Sun
 
     usleep(milliseconds * 1000); // usleep(3) wants microseconds
     #endif // Sun
 
     usleep(milliseconds * 1000); // usleep(3) wants microseconds

+#elif defined(HAVE_SLEEP)
+    // under BeOS sleep() takes seconds (what about other platforms, if any?)
+    sleep(milliseconds * 1000);

 #else // !sleep function
     #error "usleep() or nanosleep() function required for wxUsleep"
 #endif // sleep function
 #else // !sleep function
     #error "usleep() or nanosleep() function required for wxUsleep"
 #endif // sleep function


@@ -123,7 +137,7 @@ void wxUsleep(unsigned long milliseconds)
 
 int wxKill(long pid, wxSignal sig)
 {
 
 int wxKill(long pid, wxSignal sig)
 {

-    return kill(pid, (int)sig);
+    return kill((pid_t)pid, (int)sig);

 }
 
 #define WXEXECUTE_NARGS   127
 }
 
 #define WXEXECUTE_NARGS   127


@@ -198,17 +212,41 @@ long wxExecute( const wxString& command, bool sync, wxProcess *process )
     return lRc;
 }
 
     return lRc;
 }
 

-bool wxShell(const wxString& command)
+// ----------------------------------------------------------------------------
+// wxShell
+// ----------------------------------------------------------------------------
+
+static wxString wxMakeShellCommand(const wxString& command)

 {
     wxString cmd;
 {
     wxString cmd;

-    if ( !!command )
-        cmd.Printf(wxT("xterm -e %s"), command.c_str());
+    if ( !command )
+    {
+        // just an interactive shell
+        cmd = _T("xterm");
+    }

     else
     else

-        cmd = command;
+    {
+        // execute command in a shell
+        cmd << _T("/bin/sh -c '") << command << _T('\'');
+    }
+
+    return cmd;
+}
+
+bool wxShell(const wxString& command)
+{
+    return wxExecute(wxMakeShellCommand(command), TRUE /* sync */) == 0;
+}
+
+bool wxShell(const wxString& command, wxArrayString& output)
+{
+    wxCHECK_MSG( !!command, FALSE, _T("can't exec shell non interactively") );

 
 

-    return wxExecute(cmd) != 0;
+    return wxExecute(wxMakeShellCommand(command), output);

 }
 
 }
 

+#if wxUSE_GUI
+

 void wxHandleProcessTermination(wxEndProcessData *proc_data)
 {
     int pid = (proc_data->pid > 0) ? proc_data->pid : -(proc_data->pid);
 void wxHandleProcessTermination(wxEndProcessData *proc_data)
 {
     int pid = (proc_data->pid > 0) ? proc_data->pid : -(proc_data->pid);


@@ -217,9 +255,24 @@ void wxHandleProcessTermination(wxEndProcessData *proc_data)
     // systems wait() might be used instead in a loop (until the right pid
     // terminates)
     int status = 0;
     // systems wait() might be used instead in a loop (until the right pid
     // terminates)
     int status = 0;

-    if ( waitpid(pid, &status, 0) == -1 || !WIFEXITED(status) )
+    int rc;
+
+    // wait for child termination and if waitpid() was interrupted, try again
+    do
+    {
+       rc = waitpid(pid, &status, 0);
+    }
+    while ( rc == -1 && errno == EINTR );
+
+
+    if( rc == -1 || ! (WIFEXITED(status) || WIFSIGNALED(status)) )

     {
     {

-        wxLogSysError(_("Waiting for subprocess termination failed"));
+       wxLogSysError(_("Waiting for subprocess termination failed"));
+       /* AFAIK, this can only happen if something went wrong within
+          wxGTK, i.e. due to a race condition or some serious bug.
+          After having fixed the order of statements in
+          GTK_EndProcessDetector(). (KB)
+       */

     }
     else
     {
     }
     else
     {


@@ -229,25 +282,135 @@ void wxHandleProcessTermination(wxEndProcessData *proc_data)
             proc_data->process->OnTerminate(proc_data->pid,
                                             WEXITSTATUS(status));
         }
             proc_data->process->OnTerminate(proc_data->pid,
                                             WEXITSTATUS(status));
         }

+        // clean up
+        if ( proc_data->pid > 0 )
+        {
+           delete proc_data;
+        }
+        else
+        {
+           // wxExecute() will know about it
+           proc_data->exitcode = status;
+
+           proc_data->pid = 0;
+        }

     }
     }

+}

 
 

-    // clean up
-    if ( proc_data->pid > 0 )
+#endif // wxUSE_GUI
+
+// ----------------------------------------------------------------------------
+// wxStream classes to support IO redirection in wxExecute
+// ----------------------------------------------------------------------------
+
+class wxProcessFileInputStream : public wxInputStream
+{
+public:
+    wxProcessFileInputStream(int fd) { m_fd = fd; }
+    ~wxProcessFileInputStream() { close(m_fd); }
+
+    virtual bool Eof() const;
+
+protected:
+    size_t OnSysRead(void *buffer, size_t bufsize);
+
+protected:
+    int m_fd;
+};
+
+class wxProcessFileOutputStream : public wxOutputStream
+{
+public:
+    wxProcessFileOutputStream(int fd) { m_fd = fd; }
+    ~wxProcessFileOutputStream() { close(m_fd); }
+
+protected:
+    size_t OnSysWrite(const void *buffer, size_t bufsize);
+
+protected:
+    int m_fd;
+};
+
+bool wxProcessFileInputStream::Eof() const
+{
+    if ( m_lasterror == wxSTREAM_EOF )
+        return TRUE;
+
+    // check if there is any input available
+    struct timeval tv;
+    tv.tv_sec = 0;
+    tv.tv_usec = 0;
+
+    fd_set readfds;
+    FD_ZERO(&readfds);
+    FD_SET(m_fd, &readfds);
+    switch ( select(m_fd + 1, &readfds, NULL, NULL, &tv) )
+    {
+        case -1:
+            wxLogSysError(_("Impossible to get child process input"));
+            // fall through
+
+        case 0:
+            return TRUE;
+
+        default:
+            wxFAIL_MSG(_T("unexpected select() return value"));
+            // still fall through
+
+        case 1:
+            // input available: check if there is any
+            return wxInputStream::Eof();
+    }
+}
+
+size_t wxProcessFileInputStream::OnSysRead(void *buffer, size_t bufsize)
+{
+    int ret = read(m_fd, buffer, bufsize);
+    if ( ret == 0 )
+    {
+        m_lasterror = wxSTREAM_EOF;
+    }
+    else if ( ret == -1 )

     {
     {

-        delete proc_data;
+        m_lasterror = wxSTREAM_READ_ERROR;
+        ret = 0;

     }
     else
     {
     }
     else
     {

-        // wxExecute() will know about it
-        proc_data->exitcode = status;
+        m_lasterror = wxSTREAM_NOERROR;
+    }
+
+    return ret;
+}

 
 

-        proc_data->pid = 0;
+size_t wxProcessFileOutputStream::OnSysWrite(const void *buffer, size_t bufsize)
+{
+    int ret = write(m_fd, buffer, bufsize);
+    if ( ret == -1 )
+    {
+        m_lasterror = wxSTREAM_WRITE_ERROR;
+        ret = 0;
+    }
+    else
+    {
+        m_lasterror = wxSTREAM_NOERROR;

     }
     }

+
+    return ret;

 }
 
 }
 

-long wxExecute( wxChar **argv, bool sync, wxProcess *process )
+long wxExecute(wxChar **argv,
+               bool sync,
+               wxProcess *process)

 {
 {

-    wxCHECK_MSG( *argv, 0, wxT("can't exec empty command") );
+    // for the sync execution, we return -1 to indicate failure, but for async
+    // case we return 0 which is never a valid PID
+    //
+    // we define this as a macro, not a variable, to avoid compiler warnings
+    // about "ERROR_RETURN_CODE value may be clobbered by fork()"
+    #define ERROR_RETURN_CODE ((sync) ? -1 : 0)
+
+    wxCHECK_MSG( *argv, ERROR_RETURN_CODE, wxT("can't exec empty command") );

 
 #if wxUSE_UNICODE
     int mb_argc = 0;
 
 #if wxUSE_UNICODE
     int mb_argc = 0;


@@ -255,9 +418,9 @@ long wxExecute( wxChar **argv, bool sync, wxProcess *process )
 
     while (argv[mb_argc])
     {
 
     while (argv[mb_argc])
     {

-      wxWX2MBbuf mb_arg = wxConvertWX2MB(argv[mb_argc]);
-      mb_argv[mb_argc] = strdup(mb_arg);
-      mb_argc++;
+        wxWX2MBbuf mb_arg = wxConvertWX2MB(argv[mb_argc]);
+        mb_argv[mb_argc] = strdup(mb_arg);
+        mb_argc++;

     }
     mb_argv[mb_argc] = (char *) NULL;
 
     }
     mb_argv[mb_argc] = (char *) NULL;
 


@@ -275,91 +438,157 @@ long wxExecute( wxChar **argv, bool sync, wxProcess *process )
 #if wxUSE_GUI
     // create pipes
     int end_proc_detect[2];
 #if wxUSE_GUI
     // create pipes
     int end_proc_detect[2];

-    if (pipe(end_proc_detect) == -1)
+    if ( pipe(end_proc_detect) == -1 )

     {
         wxLogSysError( _("Pipe creation failed") );
     {
         wxLogSysError( _("Pipe creation failed") );

+        wxLogError( _("Failed to execute '%s'\n"), *argv );

 
         ARGS_CLEANUP;
 
 
         ARGS_CLEANUP;
 

-        return 0;
+        return ERROR_RETURN_CODE;

     }
 #endif // wxUSE_GUI
 
     }
 #endif // wxUSE_GUI
 

+    // pipes for inter process communication
+    int pipeIn[2],      // stdin
+        pipeOut[2],     // stdout
+        pipeErr[2];     // stderr
+
+    pipeIn[0] = pipeIn[1] =
+    pipeOut[0] = pipeOut[1] =
+    pipeErr[0] = pipeErr[1] = -1;
+
+    if ( process && process->IsRedirected() )
+    {
+        if ( pipe(pipeIn) == -1 || pipe(pipeOut) == -1 || pipe(pipeErr) == -1 )
+        {
+#if wxUSE_GUI
+            // free previously allocated resources
+            close(end_proc_detect[0]);
+            close(end_proc_detect[1]);
+#endif // wxUSE_GUI
+
+            wxLogSysError( _("Pipe creation failed") );
+            wxLogError( _("Failed to execute '%s'\n"), *argv );
+
+            ARGS_CLEANUP;
+
+            return ERROR_RETURN_CODE;
+        }
+    }
+

     // fork the process
     // fork the process

-#if HAVE_VFORK
+#ifdef HAVE_VFORK

     pid_t pid = vfork();
 #else
     pid_t pid = fork();
 #endif
     pid_t pid = vfork();
 #else
     pid_t pid = fork();
 #endif

-    if (pid == -1)
+
+    if ( pid == -1 )     // error?

     {
     {

+#if wxUSE_GUI
+        close(end_proc_detect[0]);
+        close(end_proc_detect[1]);
+        close(pipeIn[0]);
+        close(pipeIn[1]);
+        close(pipeOut[0]);
+        close(pipeOut[1]);
+        close(pipeErr[0]);
+        close(pipeErr[1]);
+#endif // wxUSE_GUI
+

         wxLogSysError( _("Fork failed") );
 
         ARGS_CLEANUP;
 
         wxLogSysError( _("Fork failed") );
 
         ARGS_CLEANUP;
 

-        return 0;
+        return ERROR_RETURN_CODE;

     }
     }

-    else if (pid == 0)
+    else if ( pid == 0 )  // we're in child

     {
 #if wxUSE_GUI
     {
 #if wxUSE_GUI

-        // we're in child

         close(end_proc_detect[0]); // close reading side
 #endif // wxUSE_GUI
 
         close(end_proc_detect[0]); // close reading side
 #endif // wxUSE_GUI
 

-        // These three lines close the open file descriptors to to avoid any
+        // These lines close the open file descriptors to to avoid any

         // input/output which might block the process or irritate the user. If
         // input/output which might block the process or irritate the user. If

-        // one wants proper IO for the subprocess, the right thing to do is
-        // to start an xterm executing it.
-        if (sync == 0)
+        // one wants proper IO for the subprocess, the right thing to do is to
+        // start an xterm executing it.
+        if ( !sync )

         {
         {

-            // leave stderr opened, it won't do any hurm

             for ( int fd = 0; fd < FD_SETSIZE; fd++ )
             {
             for ( int fd = 0; fd < FD_SETSIZE; fd++ )
             {

+                if ( fd == pipeIn[0] || fd == pipeOut[1] || fd == pipeErr[1]

 #if wxUSE_GUI
 #if wxUSE_GUI

-                if ( fd == end_proc_detect[1] )
-                    continue;
+                     || fd == end_proc_detect[1]

 #endif // wxUSE_GUI
 #endif // wxUSE_GUI

+                   )
+                {
+                    // don't close this one, we still need it
+                    continue;
+                }

 
 

+                // leave stderr opened too, it won't do any hurm

                 if ( fd != STDERR_FILENO )
                     close(fd);
             }
         }
 
                 if ( fd != STDERR_FILENO )
                     close(fd);
             }
         }
 

-#if 0
-        close(STDERR_FILENO);
+        // redirect stdio, stdout and stderr
+        if ( pipeIn[0] != -1 )
+        {
+            if ( dup2(pipeIn[0], STDIN_FILENO) == -1 ||
+                 dup2(pipeOut[1], STDOUT_FILENO) == -1 ||
+                 dup2(pipeErr[1], STDERR_FILENO) == -1 )
+            {
+                wxLogSysError(_("Failed to redirect child process input/output"));
+            }

 
 

-        // some programs complain about stderr not being open, so redirect
-        // them:
-        open("/dev/null", O_RDONLY);  // stdin
-        open("/dev/null", O_WRONLY);  // stdout
-        open("/dev/null", O_WRONLY);  // stderr
-#endif
+            close(pipeIn[0]);
+            close(pipeOut[1]);
+            close(pipeErr[1]);
+        }

 
         execvp (*mb_argv, mb_argv);
 
         // there is no return after successful exec()
 
         execvp (*mb_argv, mb_argv);
 
         // there is no return after successful exec()

-        wxFprintf(stderr, _("Can't execute '%s'\n"), *argv);
-

         _exit(-1);
     }
         _exit(-1);
     }

-    else
+    else // we're in parent

     {
     {

-#if wxUSE_GUI
-        // we're in parent
-        close(end_proc_detect[1]); // close writing side
+        ARGS_CLEANUP;

 
 

-        wxEndProcessData *data = new wxEndProcessData;
-        data->tag = wxAddProcessCallback(data, end_proc_detect[0]);
+        // pipe initialization: construction of the wxStreams
+        if ( process && process->IsRedirected() )
+        {
+            // These two streams are relative to this process.
+            wxOutputStream *outStream = new wxProcessFileOutputStream(pipeIn[1]);
+            wxInputStream *inStream = new wxProcessFileInputStream(pipeOut[0]);
+            wxInputStream *errStream = new wxProcessFileInputStream(pipeErr[0]);

 
 

-        ARGS_CLEANUP;
+            close(pipeIn[0]); // close reading side
+            close(pipeOut[1]); // close writing side
+            close(pipeErr[1]); // close writing side
+
+            process->SetPipeStreams(inStream, outStream, errStream);
+        }
+
+#if wxUSE_GUI
+        wxEndProcessData *data = new wxEndProcessData;

 
         if ( sync )
         {
 
         if ( sync )
         {

-            wxASSERT_MSG( !process, wxT("wxProcess param ignored for sync exec") );
+            // we may have process for capturing the program output, but it's
+            // not used in wxEndProcessData in the case of sync execution

             data->process = NULL;
 
             // sync execution: indicate it by negating the pid
             data->pid = -pid;
             data->process = NULL;
 
             // sync execution: indicate it by negating the pid
             data->pid = -pid;

+            data->tag = wxAddProcessCallback(data, end_proc_detect[0]);
+
+            close(end_proc_detect[1]); // close writing side
+
+            wxBusyCursor bc;
+            wxWindowDisabler wd;

 
             // it will be set to 0 from GTK_EndProcessDetector
             while (data->pid != 0)
 
             // it will be set to 0 from GTK_EndProcessDetector
             while (data->pid != 0)


@@ -371,13 +600,16 @@ long wxExecute( wxChar **argv, bool sync, wxProcess *process )
 
             return exitcode;
         }
 
             return exitcode;
         }

-        else
+        else // async execution

         {
             // async execution, nothing special to do - caller will be
         {
             // async execution, nothing special to do - caller will be

-            // notified about the process terminationif process != NULL, data
+            // notified about the process termination if process != NULL, data

             // will be deleted in GTK_EndProcessDetector
             // will be deleted in GTK_EndProcessDetector

-            data->process = process;
-            data->pid = pid;
+            data->process  = process;
+            data->pid      = pid;
+            data->tag      = wxAddProcessCallback(data, end_proc_detect[0]);
+
+            close(end_proc_detect[1]); // close writing side

 
             return pid;
         }
 
             return pid;
         }


@@ -393,10 +625,18 @@ long wxExecute( wxChar **argv, bool sync, wxProcess *process )
         return exitcode;
 #endif // wxUSE_GUI
     }
         return exitcode;
 #endif // wxUSE_GUI
     }

-
-    #undef ARGS_CLEANUP
+#ifdef __VMS
+   // VMS does not recognise exit as a return and complains about
+   // a missing return
+   // I think VMS is wrong in this
+   //     JJ
+   return 0;
+#endif

 }
 
 }
 

+#undef ERROR_RETURN_CODE
+#undef ARGS_CLEANUP
+

 // ----------------------------------------------------------------------------
 // file and directory functions
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // file and directory functions
 // ----------------------------------------------------------------------------


@@ -404,9 +644,14 @@ long wxExecute( wxChar **argv, bool sync, wxProcess *process )
 const wxChar* wxGetHomeDir( wxString *home  )
 {
     *home = wxGetUserHome( wxString() );
 const wxChar* wxGetHomeDir( wxString *home  )
 {
     *home = wxGetUserHome( wxString() );

+   wxString tmp;

     if ( home->IsEmpty() )
         *home = wxT("/");
     if ( home->IsEmpty() )
         *home = wxT("/");

-
+#ifdef __VMS
+   tmp = *home;
+   if ( tmp.Last() != wxT(']'))
+     if ( tmp.Last() != wxT('/')) *home << wxT('/');
+#endif

     return home->c_str();
 }
 
     return home->c_str();
 }
 


@@ -546,404 +791,230 @@ bool wxGetUserId(wxChar *buf, int sz)
 bool wxGetUserName(wxChar *buf, int sz)
 {
     struct passwd *who;
 bool wxGetUserName(wxChar *buf, int sz)
 {
     struct passwd *who;

-    char *comma;

 
     *buf = wxT('\0');
 
     *buf = wxT('\0');

-    if ((who = getpwuid (getuid ())) != NULL) {
-       comma = strchr(who->pw_gecos, ',');
+    if ((who = getpwuid (getuid ())) != NULL)
+    {
+        // pw_gecos field in struct passwd is not standard
+#ifdef HAVE_PW_GECOS
+       char *comma = strchr(who->pw_gecos, ',');

        if (comma)
            *comma = '\0'; // cut off non-name comment fields
        wxStrncpy (buf, wxConvertMB2WX(who->pw_gecos), sz - 1);
        if (comma)
            *comma = '\0'; // cut off non-name comment fields
        wxStrncpy (buf, wxConvertMB2WX(who->pw_gecos), sz - 1);

+#else // !HAVE_PW_GECOS
+       wxStrncpy (buf, wxConvertMB2WX(who->pw_name), sz - 1);
+#endif // HAVE_PW_GECOS/!HAVE_PW_GECOS

        return TRUE;
     }
 
     return FALSE;
 }
 
        return TRUE;
     }
 
     return FALSE;
 }
 

-#if wxUSE_GUI
-
-// ----------------------------------------------------------------------------
-// error and debug output routines (deprecated, use wxLog)
-// ----------------------------------------------------------------------------
-
-void wxDebugMsg( const char *format, ... )
+wxString wxGetOsDescription()

 {
 {

-  va_list ap;
-  va_start( ap, format );
-  vfprintf( stderr, format, ap );
-  fflush( stderr );
-  va_end(ap);
+#ifndef WXWIN_OS_DESCRIPTION
+    #error WXWIN_OS_DESCRIPTION should be defined in config.h by configure
+#else
+    return WXWIN_OS_DESCRIPTION;
+#endif

 }
 
 }
 

-void wxError( const wxString &msg, const wxString &title )
-{
-  wxFprintf( stderr, _("Error ") );
-  if (!title.IsNull()) wxFprintf( stderr, wxT("%s "), WXSTRINGCAST(title) );
-  if (!msg.IsNull()) wxFprintf( stderr, wxT(": %s"), WXSTRINGCAST(msg) );
-  wxFprintf( stderr, wxT(".\n") );
-}
+// this function returns the GUI toolkit version in GUI programs, but OS
+// version in non-GUI ones
+#if !wxUSE_GUI

 
 

-void wxFatalError( const wxString &msg, const wxString &title )
+int wxGetOsVersion(int *majorVsn, int *minorVsn)

 {
 {

-  wxFprintf( stderr, _("Error ") );
-  if (!title.IsNull()) wxFprintf( stderr, wxT("%s "), WXSTRINGCAST(title) );
-  if (!msg.IsNull()) wxFprintf( stderr, wxT(": %s"), WXSTRINGCAST(msg) );
-  wxFprintf( stderr, wxT(".\n") );
-  exit(3); // the same exit code as for abort()
-}
-
-// ----------------------------------------------------------------------------
-// font-related functions
-// ----------------------------------------------------------------------------
-
-// define the functions to create and destroy native fonts for this toolkit
-#ifdef __X__
-    static inline wxNativeFont wxLoadFont(const wxString& fontSpec)
-    {
-        return XLoadQueryFont((Display *)wxGetDisplay(), fontSpec);
-    }
-
-    static inline void wxFreeFont(wxNativeFont font)
-    {
-        XFreeFont((Display *)wxGetDisplay(), font);
-    }
-#elif defined(__WXGTK__)
+    int major, minor;
+    char name[256];

 
 

-    #include "gdk/gdk.h"
-
-    static inline wxNativeFont wxLoadFont(const wxString& fontSpec)
+    if ( sscanf(WXWIN_OS_DESCRIPTION, "%s %d.%d", name, &major, &minor) != 3 )

     {
     {

-        return gdk_font_load( wxConvertWX2MB(fontSpec) );
+        // unreckognized uname string format
+        major = minor = -1;

     }
 
     }
 

-    static inline void wxFreeFont(wxNativeFont font)
-    {
-        gdk_font_unref(font);
-    }
-#else
-    #error "Unknown GUI toolkit"
-#endif
+    if ( majorVsn )
+        *majorVsn = major;
+    if ( minorVsn )
+        *minorVsn = minor;

 
 

-// returns TRUE if there are any fonts matching this font spec
-static bool wxTestFontSpec(const wxString& fontspec)
-{
-    wxNativeFont test = wxLoadFont(fontspec);
-    if ( test )
-    {
-        wxFreeFont(test);
-
-        return TRUE;
-    }
-    else
-    {
-        return FALSE;
-    }
+    return wxUNIX;

 }
 
 }
 

-// TODO encoding test logic should be moved to wxLoadQueryNearestFont()
-static wxNativeFont wxLoadQueryFont(int pointSize,
-                                    int family,
-                                    int style,
-                                    int weight,
-                                    bool WXUNUSED(underlined),
-                                    const wxString &facename,
-                                    wxFontEncoding encoding )
-{
-    wxString xfamily;
-    switch (family)
-    {
-        case wxDECORATIVE: xfamily = wxT("lucida"); break;
-        case wxROMAN:      xfamily = wxT("times");  break;
-        case wxMODERN:     xfamily = wxT("courier"); break;
-        case wxSWISS:      xfamily = wxT("helvetica"); break;
-        case wxTELETYPE:   xfamily = wxT("lucidatypewriter"); break;
-        case wxSCRIPT:     xfamily = wxT("utopia"); break;
-        default:           xfamily = wxT("*");
-    }
+#endif // !wxUSE_GUI

 
 

-    wxString fontSpec;
-    if (!facename.IsEmpty())
+long wxGetFreeMemory()
+{
+#if defined(__LINUX__)
+    // get it from /proc/meminfo
+    FILE *fp = fopen("/proc/meminfo", "r");
+    if ( fp )

     {
     {

-        fontSpec.Printf(wxT("-*-%s-*-*-normal-*-*-*-*-*-*-*-*-*"),
-                        facename.c_str());
+        long memFree = -1;

 
 

-        if ( wxTestFontSpec(fontSpec) )
+        char buf[1024];
+        if ( fgets(buf, WXSIZEOF(buf), fp) && fgets(buf, WXSIZEOF(buf), fp) )

         {
         {

-            xfamily = facename;
+            long memTotal, memUsed;
+            sscanf(buf, "Mem: %ld %ld %ld", &memTotal, &memUsed, &memFree);

         }
         }

-        //else: no such family, use default one instead
-    }
-
-    wxString xstyle;
-    switch (style)
-    {
-        case wxITALIC:     xstyle = wxT("i"); break;
-        case wxSLANT:      xstyle = wxT("o"); break;
-        case wxNORMAL:     xstyle = wxT("r"); break;
-        default:           xstyle = wxT("*"); break;
-    }

 
 

-    wxString xweight;
-    switch (weight)
-    {
-         case wxBOLD:       
-             {
-                  fontSpec.Printf(wxT("-*-%s-bold-*-*-*-*-*-*-*-*-*-*-*"),
-                         xfamily.c_str());
-                  if ( wxTestFontSpec(fontSpec) )
-                  {
-                       xweight = wxT("bold"); 
-                       break;
-                  }
-                  fontSpec.Printf(wxT("-*-%s-heavy-*-*-*-*-*-*-*-*-*-*-*"),
-                         xfamily.c_str());
-                  if ( wxTestFontSpec(fontSpec) )
-                  {
-                       xweight = wxT("heavy"); 
-                       break;
-                  }
-                  fontSpec.Printf(wxT("-*-%s-extrabold-*-*-*-*-*-*-*-*-*-*-*"),
-                         xfamily.c_str());
-                  if ( wxTestFontSpec(fontSpec) )
-                  {
-                      xweight = wxT("extrabold");
-                      break;
-                  }
-                  fontSpec.Printf(wxT("-*-%s-demibold-*-*-*-*-*-*-*-*-*-*-*"),
-                         xfamily.c_str());
-                  if ( wxTestFontSpec(fontSpec) )
-                  {
-                      xweight = wxT("demibold");
-                      break;
-                  }
-                  fontSpec.Printf(wxT("-*-%s-black-*-*-*-*-*-*-*-*-*-*-*"),
-                         xfamily.c_str());
-                  if ( wxTestFontSpec(fontSpec) )
-                  {
-                      xweight = wxT("black");
-                      break;
-                  }
-                  fontSpec.Printf(wxT("-*-%s-ultrablack-*-*-*-*-*-*-*-*-*-*-*"),
-                         xfamily.c_str());
-                  if ( wxTestFontSpec(fontSpec) )
-                  {
-                      xweight = wxT("ultrablack");
-                      break;
-                  }
-              }   
-              break;
-        case wxLIGHT:
-             {
-                  fontSpec.Printf(wxT("-*-%s-light-*-*-*-*-*-*-*-*-*-*-*"),
-                         xfamily.c_str());
-                  if ( wxTestFontSpec(fontSpec) )
-                  {
-                       xweight = wxT("light");
-                       break;
-                  }
-                  fontSpec.Printf(wxT("-*-%s-thin-*-*-*-*-*-*-*-*-*-*-*"),
-                         xfamily.c_str());
-                  if ( wxTestFontSpec(fontSpec) )
-                  {
-                       xweight = wxT("thin"); 
-                       break;
-                  }
-             }
-             break;
-         case wxNORMAL:     
-             {
-                  fontSpec.Printf(wxT("-*-%s-medium-*-*-*-*-*-*-*-*-*-*-*"),
-                         xfamily.c_str());
-                  if ( wxTestFontSpec(fontSpec) )
-                  {
-                       xweight = wxT("medium"); 
-                       break;
-                  }
-                  fontSpec.Printf(wxT("-*-%s-normal-*-*-*-*-*-*-*-*-*-*-*"),
-                         xfamily.c_str());
-                  if ( wxTestFontSpec(fontSpec) )
-                  {
-                       xweight = wxT("normal"); 
-                       break;
-                  }
-                  fontSpec.Printf(wxT("-*-%s-regular-*-*-*-*-*-*-*-*-*-*-*"),
-                         xfamily.c_str());
-                  if ( wxTestFontSpec(fontSpec) )
-                  {
-                      xweight = wxT("regular");
-                      break;
-                  }
-                  xweight = wxT("*");
-              }   
-              break;
-        default:           xweight = wxT("*"); break;
-    }
+        fclose(fp);

 
 

-    wxString xregistry, xencoding;
-    if ( !wxGetXFontEncoding(encoding, &xregistry, &xencoding) )
-    {
-        fontSpec.Printf(wxT("-*-*-*-*-*-*-*-*-*-*-*-*-%s-%s"),
-                        xregistry.c_str(), xencoding.c_str());
-        if ( !wxTestFontSpec(fontSpec) )
-        {
-            // this encoding isn't available - what to do?
-            xregistry =
-            xencoding = wxT("*");
-        }
+        return memFree;

     }
     }

+#elif defined(__SUN__) && defined(_SC_AVPHYS_PAGES)
+    return sysconf(_SC_AVPHYS_PAGES)*sysconf(_SC_PAGESIZE);
+//#elif defined(__FREEBSD__) -- might use sysctl() to find it out, probably
+#endif

 
 

-    // construct the X font spec from our data
-    fontSpec.Printf(wxT("-*-%s-%s-%s-normal-*-*-%d-*-*-*-*-%s-%s"),
-                    xfamily.c_str(), xweight.c_str(), xstyle.c_str(),
-                    pointSize, xregistry.c_str(), xencoding.c_str());
-
-    return wxLoadFont(fontSpec);
+    // can't find it out
+    return -1;

 }
 
 }
 

-bool wxGetXFontEncoding(wxFontEncoding encoding,
-                        wxString *pregistry, wxString *pencoding)
-{
-    wxCHECK_MSG( pencoding && pregistry, FALSE, wxT("bad pointer") );
+// ----------------------------------------------------------------------------
+// env vars
+// ----------------------------------------------------------------------------

 
 

-    wxString& xencoding = *pencoding;
-    wxString& xregistry = *pregistry;
+bool wxGetEnv(const wxString& var, wxString *value)
+{
+    // wxGetenv is defined as getenv()
+    wxChar *p = wxGetenv(var);
+    if ( !p )
+        return FALSE;

 
 

-    if ( encoding == wxFONTENCODING_DEFAULT )
+    if ( value )

     {
     {

-        // use the apps default
-        encoding = wxFont::GetDefaultEncoding();
+        *value = p;

     }
 
     }
 

-    bool test = TRUE;   // should we test for availability of encoding?
-    switch ( encoding )
-    {
-        case wxFONTENCODING_ISO8859_1:
-        case wxFONTENCODING_ISO8859_2:
-        case wxFONTENCODING_ISO8859_3:
-        case wxFONTENCODING_ISO8859_4:
-        case wxFONTENCODING_ISO8859_5:
-        case wxFONTENCODING_ISO8859_6:
-        case wxFONTENCODING_ISO8859_7:
-        case wxFONTENCODING_ISO8859_8:
-        case wxFONTENCODING_ISO8859_9:
-        case wxFONTENCODING_ISO8859_10:
-        case wxFONTENCODING_ISO8859_11:
-        case wxFONTENCODING_ISO8859_13:
-        case wxFONTENCODING_ISO8859_14:
-        case wxFONTENCODING_ISO8859_15:
-            {
-                int cp = encoding - wxFONTENCODING_ISO8859_1 + 1;
-                xregistry = wxT("iso8859");
-                xencoding.Printf(wxT("%d"), cp);
-            }
-            break;
+    return TRUE;
+}

 
 

-        case wxFONTENCODING_KOI8:
-            xregistry = wxT("koi8");
-            if ( wxTestFontSpec(wxT("-*-*-*-*-*-*-*-*-*-*-*-*-koi8-1")) )
-            {
-                xencoding = wxT("1");
+bool wxSetEnv(const wxString& variable, const wxChar *value)
+{
+#if defined(HAVE_SETENV)
+    return setenv(variable.mb_str(), value ? wxString(value).mb_str().data()
+                                           : NULL, 1 /* overwrite */) == 0;
+#elif defined(HAVE_PUTENV)
+    wxString s = variable;
+    if ( value )
+        s << _T('=') << value;
+
+    // transform to ANSI
+    const char *p = s.mb_str();
+
+    // the string will be free()d by libc
+    char *buf = (char *)malloc(strlen(p) + 1);
+    strcpy(buf, p);
+
+    return putenv(buf) == 0;
+#else // no way to set an env var
+    return FALSE;
+#endif
+}

 
 

-                // test passed, no need to do it once more
-                test = FALSE;
-            }
-            else
-            {
-                xencoding = wxT("*");
-            }
-            break;
+// ----------------------------------------------------------------------------
+// signal handling
+// ----------------------------------------------------------------------------

 
 

-        case wxFONTENCODING_CP1250:
-        case wxFONTENCODING_CP1251:
-        case wxFONTENCODING_CP1252:
-            {
-                int cp = encoding - wxFONTENCODING_CP1250 + 1250;
-                wxString fontSpec;
-                fontSpec.Printf(wxT("-*-*-*-*-*-*-*-*-*-*-*-*-microsoft-cp%d"),
-                                cp);
-                if ( wxTestFontSpec(fontSpec) )
-                {
-                    xregistry = wxT("microsoft");
-                    xencoding.Printf(wxT("cp%d"), cp);
+#if wxUSE_ON_FATAL_EXCEPTION

 
 

-                    // test passed, no need to do it once more
-                    test = FALSE;
-                }
-                else
-                {
-                    // fall back to LatinX
-                    xregistry = wxT("iso8859");
-                    xencoding.Printf(wxT("%d"), cp - 1249);
-                }
-            }
-            break;
+#include <signal.h>

 
 

-        case wxFONTENCODING_SYSTEM:
-        default:
-            test = FALSE;
-            xregistry =
-            xencoding = wxT("*");
+static void wxFatalSignalHandler(wxTYPE_SA_HANDLER)
+{
+    if ( wxTheApp )
+    {
+        // give the user a chance to do something special about this
+        wxTheApp->OnFatalException();

     }
 
     }
 

-    return !test;
+    abort();

 }
 
 }
 

-wxNativeFont wxLoadQueryNearestFont(int pointSize,
-                                    int family,
-                                    int style,
-                                    int weight,
-                                    bool underlined,
-                                    const wxString &facename,
-                                    wxFontEncoding encoding)
+bool wxHandleFatalExceptions(bool doit)

 {
 {

-    wxNativeFont font = wxLoadQueryFont( pointSize, family, style, weight,
-                                         underlined, facename, encoding );
-
-    if (!font)
-    {
-        // search up and down by stepsize 10
-        int max_size = pointSize + 20 * (1 + (pointSize/180));
-        int min_size = pointSize - 20 * (1 + (pointSize/180));
-
-        int i;
-
-        // Search for smaller size (approx.)
-        for ( i = pointSize - 10; !font && i >= 10 && i >= min_size; i -= 10 )
-        {
-            font = wxLoadQueryFont(i, family, style, weight, underlined,
-                                   facename, encoding );
-        }
-
-        // Search for larger size (approx.)
-        for ( i = pointSize + 10; !font && i <= max_size; i += 10 )
+    // old sig handlers
+    static bool s_savedHandlers = FALSE;
+    static struct sigaction s_handlerFPE,
+                            s_handlerILL,
+                            s_handlerBUS,
+                            s_handlerSEGV;
+
+    bool ok = TRUE;
+    if ( doit && !s_savedHandlers )
+    {
+        // install the signal handler
+        struct sigaction act;
+
+        // some systems extend it with non std fields, so zero everything
+        memset(&act, 0, sizeof(act));
+
+        act.sa_handler = wxFatalSignalHandler;
+        sigemptyset(&act.sa_mask);
+        act.sa_flags = 0;
+
+        ok &= sigaction(SIGFPE, &act, &s_handlerFPE) == 0;
+        ok &= sigaction(SIGILL, &act, &s_handlerILL) == 0;
+        ok &= sigaction(SIGBUS, &act, &s_handlerBUS) == 0;
+        ok &= sigaction(SIGSEGV, &act, &s_handlerSEGV) == 0;
+        if ( !ok )

         {
         {

-            font = wxLoadQueryFont( i, family, style, weight, underlined,
-                                    facename, encoding );
+            wxLogDebug(_T("Failed to install our signal handler."));

         }
 
         }
 

-        // Try default family
-        if ( !font && family != wxDEFAULT )
+        s_savedHandlers = TRUE;
+    }
+    else if ( s_savedHandlers )
+    {
+        // uninstall the signal handler
+        ok &= sigaction(SIGFPE, &s_handlerFPE, NULL) == 0;
+        ok &= sigaction(SIGILL, &s_handlerILL, NULL) == 0;
+        ok &= sigaction(SIGBUS, &s_handlerBUS, NULL) == 0;
+        ok &= sigaction(SIGSEGV, &s_handlerSEGV, NULL) == 0;
+        if ( !ok )

         {
         {

-            font = wxLoadQueryFont( pointSize, wxDEFAULT, style, weight,
-                                    underlined, facename, encoding );
+            wxLogDebug(_T("Failed to uninstall our signal handler."));

         }
 
         }
 

-        // Bogus font I
-        if ( !font )
-        {
-            font = wxLoadQueryFont(120, wxDEFAULT, wxNORMAL, wxNORMAL,
-                                   underlined, facename, encoding );
-        }
- 
-        // Bogus font II
-       if ( !font )
-       {
-           font = wxLoadQueryFont(120, wxDEFAULT, wxNORMAL, wxNORMAL,
-                                  underlined, wxEmptyString, encoding );
-       }
+        s_savedHandlers = FALSE;

     }
     }

+    //else: nothing to do

 
 

-    return font;
+    return ok;
+}
+
+#endif // wxUSE_ON_FATAL_EXCEPTION
+
+// ----------------------------------------------------------------------------
+// error and debug output routines (deprecated, use wxLog)
+// ----------------------------------------------------------------------------
+
+void wxDebugMsg( const char *format, ... )
+{
+  va_list ap;
+  va_start( ap, format );
+  vfprintf( stderr, format, ap );
+  fflush( stderr );
+  va_end(ap);
+}
+
+void wxError( const wxString &msg, const wxString &title )
+{
+  wxFprintf( stderr, _("Error ") );
+  if (!title.IsNull()) wxFprintf( stderr, wxT("%s "), WXSTRINGCAST(title) );
+  if (!msg.IsNull()) wxFprintf( stderr, wxT(": %s"), WXSTRINGCAST(msg) );
+  wxFprintf( stderr, wxT(".\n") );
+}
+
+void wxFatalError( const wxString &msg, const wxString &title )
+{
+  wxFprintf( stderr, _("Error ") );
+  if (!title.IsNull()) wxFprintf( stderr, wxT("%s "), WXSTRINGCAST(title) );
+  if (!msg.IsNull()) wxFprintf( stderr, wxT(": %s"), WXSTRINGCAST(msg) );
+  wxFprintf( stderr, wxT(".\n") );
+  exit(3); // the same exit code as for abort()

 }
 
 }
 

-#endif // wxUSE_GUI