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