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