src/gtk/utilsgtk.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        utils.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
   7 // Licence:           wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 //#ifdef __GNUG__
  12 //#pragma implementation "utils.h"
  13 //#endif
  14
  15 #include "wx/utils.h"
  16 #include "wx/string.h"
  17
  18 #include "wx/intl.h"
  19 #include "wx/log.h"
  20
  21 #include <stdarg.h>
  22 #include <dirent.h>
  23 #include <string.h>
  24 #include <sys/stat.h>
  25 #include <sys/types.h>
  26 #include <unistd.h>
  27 #include <sys/wait.h>
  28 #include <pwd.h>
  29 #include <errno.h>
  30 #include <netdb.h>
  31 #include <signal.h>
  32
  33 #include <X11/Xlib.h>
  34 #include <X11/Xutil.h>
  35 #include <X11/Xresource.h>
  36
  37 #include "glib.h"
  38 #include "gdk/gdk.h"
  39 #include "gtk/gtk.h"
  40 #include "gdk/gdkx.h"
  41
  42 #ifdef __SVR4__
  43   #include <sys/systeminfo.h>
  44 #endif
  45
  46 #ifdef __SOLARIS__
  47 // somehow missing from sys/wait.h but in the system's docs
  48 extern "C"
  49 {
  50    pid_t wait4(pid_t pid, int *statusp, int options, struct rusage
  51                *rusage);
  52 }
  53 #endif
  54
  55 //------------------------------------------------------------------------
  56 // misc.
  57 //------------------------------------------------------------------------
  58
  59 void wxBell(void)
  60 {
  61     gdk_beep();
  62 }
  63
  64 void wxSleep(int nSecs)
  65 {
  66     sleep(nSecs);
  67 }
  68
  69 int wxKill(long pid, int sig)
  70 {
  71     return kill(pid, sig);
  72 }
  73
  74 void wxDisplaySize( int *width, int *height )
  75 {
  76     if (width) *width = gdk_screen_width();
  77     if (height) *height = gdk_screen_height();
  78 }
  79
  80 void wxGetMousePosition( int* x, int* y )
  81 {
  82     Window       dumw;
  83     int          dumi;
  84     unsigned int dumu;
  85
  86     XQueryPointer( GDK_DISPLAY(),GDK_ROOT_WINDOW(),
  87                    &dumw,&dumw,x,y,&dumi,&dumi,&dumu );
  88 }
  89
  90 bool wxColourDisplay(void)
  91 {
  92     return TRUE;
  93 }
  94
  95 int wxDisplayDepth(void)
  96 {
  97     return gdk_window_get_visual( (GdkWindow*) &gdk_root_parent )->depth;
  98 }
  99
 100 //------------------------------------------------------------------------
 101 // user and home routines
 102 //------------------------------------------------------------------------
 103
 104 const char* wxGetHomeDir( wxString *home  )
 105 {
 106     *home = wxGetUserHome( wxString() );
 107     if (home->IsNull()) *home = "/";
 108     return *home;
 109 }
 110
 111 char *wxGetUserHome( const wxString &user )
 112 {
 113     struct passwd *who = (struct passwd *) NULL;
 114
 115     if (user.IsNull() || (user== ""))
 116     {
 117         register char *ptr;
 118
 119         if ((ptr = getenv("HOME")) != NULL)
 120         {
 121             return ptr;
 122         }
 123         if ((ptr = getenv("USER")) != NULL || (ptr = getenv("LOGNAME")) != NULL)
 124         {
 125             who = getpwnam(ptr);
 126         }
 127         // We now make sure the the user exists!
 128         if (who == NULL)
 129         {
 130             who = getpwuid(getuid());
 131         }
 132     }
 133     else
 134     {
 135       who = getpwnam (user);
 136     }
 137
 138     return who ? who->pw_dir : (char*)NULL;
 139 }
 140
 141 //------------------------------------------------------------------------
 142 // id routines
 143 //------------------------------------------------------------------------
 144
 145 bool wxGetHostName(char *buf, int sz)
 146 {
 147     *buf = '\0';
 148 #if defined(__SVR4__) && !defined(__sgi)
 149     //KB: does this return the fully qualified host.domain name?
 150     return (sysinfo(SI_HOSTNAME, buf, sz) != -1);
 151 #else /* BSD Sockets */
 152     char name[255], domain[255];
 153     //struct hostent *h;
 154     // Get hostname
 155     if (gethostname(name, sizeof(name)/sizeof(char)-1) == -1)
 156         return FALSE;
 157     if (getdomainname(domain, sizeof(domain)/sizeof(char)-1) == -1)
 158         return FALSE;
 159     // Get official full name of host
 160     // doesn't return the full qualified name, replaced by following
 161     // code (KB)
 162     // strncpy(buf, (h=gethostbyname(name))!=NULL ? h->h_name : name, sz-1);
 163     if((unsigned)sz > strlen(name)+strlen(domain)+1)
 164     {
 165         strcpy(buf, name);
 166         if(strcmp(domain,"(none)") == 0) // standalone machine
 167         {
 168             strcat(buf,".");
 169             strcat(buf,domain);
 170         }
 171     }
 172     else
 173         return FALSE;
 174     return TRUE;
 175 #endif
 176 }
 177
 178 bool wxGetUserId(char *buf, int sz)
 179 {
 180     struct passwd *who;
 181
 182     *buf = '\0';
 183     if ((who = getpwuid(getuid ())) != NULL) {
 184         strncpy (buf, who->pw_name, sz-1);
 185         return TRUE;
 186     }
 187     return FALSE;
 188 }
 189
 190 bool wxGetUserName(char *buf, int sz)
 191 {
 192     struct passwd *who;
 193     char *comma;
 194
 195     *buf = '\0';
 196     if ((who = getpwuid (getuid ())) != NULL) {
 197        comma = strchr(who->pw_gecos,'c');
 198        if(comma) *comma = '\0'; // cut off non-name comment fields
 199        strncpy (buf, who->pw_gecos, sz - 1);
 200         return TRUE;
 201     }
 202     return FALSE;
 203 }
 204
 205 //------------------------------------------------------------------------
 206 // error and debug output routines
 207 //------------------------------------------------------------------------
 208
 209 void wxDebugMsg( const char *format, ... )
 210 {
 211   va_list ap;
 212   va_start( ap, format );
 213   vfprintf( stderr, format, ap );
 214   fflush( stderr );
 215   va_end(ap);
 216 }
 217
 218 void wxError( const wxString &msg, const wxString &title )
 219 {
 220   fprintf( stderr, "Error " );
 221   if (!title.IsNull()) fprintf( stderr, "%s ", WXSTRINGCAST(title) );
 222   if (!msg.IsNull()) fprintf( stderr, ": %s", WXSTRINGCAST(msg) );
 223   fprintf( stderr, ".\n" );
 224 }
 225
 226 void wxFatalError( const wxString &msg, const wxString &title )
 227 {
 228   fprintf( stderr, "Error " );
 229   if (!title.IsNull()) fprintf( stderr, "%s ", WXSTRINGCAST(title) );
 230   if (!msg.IsNull()) fprintf( stderr, ": %s", WXSTRINGCAST(msg) );
 231   fprintf( stderr, ".\n" );
 232   exit(3); // the same exit code as for abort()
 233 }
 234
 235 //------------------------------------------------------------------------
 236 // directory routines
 237 //------------------------------------------------------------------------
 238
 239 bool wxDirExists( const wxString& dir )
 240 {
 241     char buf[500];
 242     strcpy( buf, WXSTRINGCAST(dir) );
 243     struct stat sbuf;
 244     return ((stat(buf, &sbuf) != -1) && S_ISDIR(sbuf.st_mode) ? TRUE : FALSE);
 245 }
 246
 247 //------------------------------------------------------------------------
 248 // subprocess routines
 249 //------------------------------------------------------------------------
 250
 251 struct wxEndProcessData
 252 {
 253   gint pid, tag;
 254   wxProcess *process;
 255 };
 256
 257 static void GTK_EndProcessDetector(gpointer data, gint source,
 258                                    GdkInputCondition WXUNUSED(condition) )
 259 {
 260   wxEndProcessData *proc_data = (wxEndProcessData *)data;
 261   int pid;
 262
 263   pid = (proc_data->pid > 0) ? proc_data->pid : -(proc_data->pid);
 264
 265   /* wait4 is not part of any standard, use at own risk
 266    * not sure what wait4 does, but wait3 seems to be closest, whats a digit ;-)
 267    * --- offer@sgi.com */
 268 #if !defined(__sgi)
 269   wait4(proc_data->pid, NULL, 0, NULL);
 270 #else
 271   wait3((int *) NULL, 0, (rusage *) NULL);
 272 #endif
 273
 274   close(source);
 275   gdk_input_remove(proc_data->tag);
 276
 277   if (proc_data->process)
 278     proc_data->process->OnTerminate(proc_data->pid);
 279
 280   if (proc_data->pid > 0)
 281     delete proc_data;
 282   else
 283     proc_data->pid = 0;
 284 }
 285
 286 long wxExecute( char **argv, bool sync, wxProcess *process )
 287 {
 288     wxEndProcessData *data = new wxEndProcessData;
 289     int end_proc_detect[2];
 290
 291     wxCHECK_MSG( *argv, 0, "can't exec empty command" );
 292
 293     /* Create pipes */
 294     if (pipe(end_proc_detect) == -1) {
 295       wxLogSysError(_("Pipe creation failed"));
 296       return 0;
 297     }
 298
 299     /* fork the process */
 300 #if defined(sun) || defined(__ultrix) || defined(__bsdi__)
 301     pid_t pid = vfork();
 302 #else
 303     pid_t pid = fork();
 304 #endif
 305     if (pid == -1) {
 306         // error
 307         wxLogSysError(_("Fork failed"));
 308         return 0;
 309     }
 310     else if (pid == 0) {
 311         // we're in child
 312         close(end_proc_detect[0]); // close reading side
 313         // These three lines close the open file descriptors to
 314         // to avoid any input/output which might block the process
 315         // or irritate the user. If one wants proper IO for the sub-
 316         // process, the "right thing to do" is to start an xterm executing
 317         // it.
 318         close(STDIN_FILENO);
 319         close(STDOUT_FILENO);
 320         close(STDERR_FILENO);
 321
 322 #ifdef _AIX
 323         execvp ((const char *)*argv, (const char **)argv);
 324 #else
 325         execvp (*argv, argv);
 326 #endif
 327         // there is no return after successful exec()
 328         wxLogSysError(_("Can't execute '%s'"), *argv);
 329
 330         _exit(-1);
 331     }
 332     else {
 333       // we're in parent
 334       close(end_proc_detect[1]); // close writing side
 335       data->tag = gdk_input_add(end_proc_detect[0], GDK_INPUT_READ,
 336                                 GTK_EndProcessDetector, (gpointer)data);
 337       data->pid = pid;
 338       if (!sync) {
 339         data->process = process;
 340       }
 341       else {
 342         data->process = (wxProcess *) NULL;
 343         data->pid = -(data->pid);
 344
 345         while (data->pid != 0)
 346           wxYield();
 347
 348         delete data;
 349       }
 350
 351       // @@@ our return value indicates success even if execvp() in the child
 352       //     failed!
 353       return pid;
 354     }
 355 }
 356
 357 long wxExecute( const wxString& command, bool sync, wxProcess *process )
 358 {
 359     static const char *IFS = " \t\n";
 360
 361     wxCHECK_MSG( !command.IsEmpty(), 0, "can't exec empty command" );
 362
 363     int argc = 0;
 364     char *argv[127];
 365     char *tmp = new char[command.Len() + 1];
 366     strcpy(tmp, command);
 367
 368     argv[argc++] = strtok(tmp, IFS);
 369     while ((argv[argc++] = strtok((char *) NULL, IFS)) != NULL)
 370         /* loop */ ;
 371
 372     long lRc = wxExecute(argv, sync, process);
 373
 374     delete [] tmp;
 375
 376     return lRc;
 377 }