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 "glib.h"
  34 #include "gdk/gdk.h"
  35 #include "gtk/gtk.h"
  36 #include "gtk/gtkfeatures.h"
  37 #include "gdk/gdkx.h"
  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     gdk_window_get_pointer( (GdkWindow*) NULL, x, y, (GdkModifierType*) NULL );
  80 }
  81
  82 bool wxColourDisplay(void)
  83 {
  84     return TRUE;
  85 }
  86
  87 int wxDisplayDepth(void)
  88 {
  89     return gdk_window_get_visual( (GdkWindow*) &gdk_root_parent )->depth;
  90 }
  91
  92 int wxGetOsVersion(int *majorVsn, int *minorVsn)
  93 {
  94   if (majorVsn) *majorVsn = GTK_MAJOR_VERSION;
  95   if (minorVsn) *minorVsn = GTK_MINOR_VERSION;
  96
  97   return wxGTK;
  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
 128         /* We now make sure the the user exists! */
 129         if (who == NULL)
 130         {
 131             who = getpwuid(getuid());
 132         }
 133     }
 134     else
 135     {
 136       who = getpwnam (user);
 137     }
 138
 139     return who ? who->pw_dir : (char*)NULL;
 140 }
 141
 142 //------------------------------------------------------------------------
 143 // id routines
 144 //------------------------------------------------------------------------
 145
 146 bool wxGetHostName(char *buf, int sz)
 147 {
 148     *buf = '\0';
 149 #if defined(__SVR4__) && !defined(__sgi)
 150     //KB: does this return the fully qualified host.domain name?
 151     return (sysinfo(SI_HOSTNAME, buf, sz) != -1);
 152 #else /* BSD Sockets */
 153     char name[255], domain[255];
 154     //struct hostent *h;
 155     // Get hostname
 156     if (gethostname(name, sizeof(name)/sizeof(char)-1) == -1)
 157         return FALSE;
 158     if (getdomainname(domain, sizeof(domain)/sizeof(char)-1) == -1)
 159         return FALSE;
 160     // Get official full name of host
 161     // doesn't return the full qualified name, replaced by following
 162     // code (KB)
 163     // strncpy(buf, (h=gethostbyname(name))!=NULL ? h->h_name : name, sz-1);
 164     if((unsigned)sz > strlen(name)+strlen(domain)+1)
 165     {
 166         strcpy(buf, name);
 167         if(strcmp(domain,"(none)") == 0) // standalone machine
 168         {
 169             strcat(buf,".");
 170             strcat(buf,domain);
 171         }
 172     }
 173     else
 174         return FALSE;
 175     return TRUE;
 176 #endif
 177 }
 178
 179 bool wxGetUserId(char *buf, int sz)
 180 {
 181     struct passwd *who;
 182
 183     *buf = '\0';
 184     if ((who = getpwuid(getuid ())) != NULL) {
 185         strncpy (buf, who->pw_name, sz-1);
 186         return TRUE;
 187     }
 188     return FALSE;
 189 }
 190
 191 bool wxGetUserName(char *buf, int sz)
 192 {
 193     struct passwd *who;
 194     char *comma;
 195
 196     *buf = '\0';
 197     if ((who = getpwuid (getuid ())) != NULL) {
 198        comma = strchr(who->pw_gecos,'c');
 199        if(comma) *comma = '\0'; // cut off non-name comment fields
 200        strncpy (buf, who->pw_gecos, sz - 1);
 201         return TRUE;
 202     }
 203     return FALSE;
 204 }
 205
 206 //------------------------------------------------------------------------
 207 // error and debug output routines
 208 //------------------------------------------------------------------------
 209
 210 void wxDebugMsg( const char *format, ... )
 211 {
 212   va_list ap;
 213   va_start( ap, format );
 214   vfprintf( stderr, format, ap );
 215   fflush( stderr );
 216   va_end(ap);
 217 }
 218
 219 void wxError( const wxString &msg, const wxString &title )
 220 {
 221   fprintf( stderr, "Error " );
 222   if (!title.IsNull()) fprintf( stderr, "%s ", WXSTRINGCAST(title) );
 223   if (!msg.IsNull()) fprintf( stderr, ": %s", WXSTRINGCAST(msg) );
 224   fprintf( stderr, ".\n" );
 225 }
 226
 227 void wxFatalError( const wxString &msg, const wxString &title )
 228 {
 229   fprintf( stderr, "Error " );
 230   if (!title.IsNull()) fprintf( stderr, "%s ", WXSTRINGCAST(title) );
 231   if (!msg.IsNull()) fprintf( stderr, ": %s", WXSTRINGCAST(msg) );
 232   fprintf( stderr, ".\n" );
 233   exit(3); // the same exit code as for abort()
 234 }
 235
 236 //------------------------------------------------------------------------
 237 // directory routines
 238 //------------------------------------------------------------------------
 239
 240 bool wxDirExists( const wxString& dir )
 241 {
 242     char buf[500];
 243     strcpy( buf, WXSTRINGCAST(dir) );
 244     struct stat sbuf;
 245     return ((stat(buf, &sbuf) != -1) && S_ISDIR(sbuf.st_mode) ? TRUE : FALSE);
 246 }
 247
 248 //------------------------------------------------------------------------
 249 // subprocess routines
 250 //------------------------------------------------------------------------
 251
 252 struct wxEndProcessData
 253 {
 254     gint pid, tag;
 255     wxProcess *process;
 256 };
 257
 258 static void GTK_EndProcessDetector(gpointer data, gint source,
 259                                    GdkInputCondition WXUNUSED(condition) )
 260 {
 261     wxEndProcessData *proc_data = (wxEndProcessData *)data;
 262     int pid;
 263
 264     pid = (proc_data->pid > 0) ? proc_data->pid : -(proc_data->pid);
 265
 266     /* wait4 is not part of any standard, use at own risk
 267      * not sure what wait4 does, but wait3 seems to be closest, whats a digit ;-)
 268      * --- offer@sgi.com */
 269 #if !defined(__sgi)
 270     wait4(proc_data->pid, (int*) NULL, 0, (rusage *) NULL);
 271 #else
 272     wait3((int *) NULL, 0, (rusage *) NULL);
 273 #endif
 274
 275     close(source);
 276     gdk_input_remove(proc_data->tag);
 277
 278     if (proc_data->process)
 279         proc_data->process->OnTerminate(proc_data->pid);
 280
 281     if (proc_data->pid > 0)
 282         delete proc_data;
 283     else
 284         proc_data->pid = 0;
 285 }
 286
 287 long wxExecute( char **argv, bool sync, wxProcess *process )
 288 {
 289     wxEndProcessData *data = new wxEndProcessData;
 290     int end_proc_detect[2];
 291
 292     wxCHECK_MSG( *argv, 0, "can't exec empty command" );
 293
 294     /* Create pipes */
 295     if (pipe(end_proc_detect) == -1)
 296     {
 297       wxLogSysError( "Pipe creation failed" );
 298       return 0;
 299     }
 300
 301     /* fork the process */
 302 #if defined(sun) || defined(__ultrix) || defined(__bsdi__)
 303     pid_t pid = vfork();
 304 #else
 305     pid_t pid = fork();
 306 #endif
 307     if (pid == -1)
 308     {
 309         wxLogSysError( "Fork failed" );
 310         return 0;
 311     }
 312     else if (pid == 0)
 313     {
 314         // we're in child
 315         close(end_proc_detect[0]); // close reading side
 316         // These three lines close the open file descriptors to
 317         // to avoid any input/output which might block the process
 318         // or irritate the user. If one wants proper IO for the sub-
 319         // process, the "right thing to do" is to start an xterm executing
 320         // it.
 321         close(STDIN_FILENO);
 322         close(STDOUT_FILENO);
 323         close(STDERR_FILENO);
 324
 325 #ifdef _AIX
 326         execvp ((const char *)*argv, (const char **)argv);
 327 #else
 328         execvp (*argv, argv);
 329 #endif
 330         // there is no return after successful exec()
 331         wxLogSysError( "Can't execute '%s'", *argv);
 332
 333         _exit(-1);
 334     }
 335     else
 336     {
 337       // we're in parent
 338       close(end_proc_detect[1]); // close writing side
 339       data->tag = gdk_input_add(end_proc_detect[0], GDK_INPUT_READ,
 340                                 GTK_EndProcessDetector, (gpointer)data);
 341       data->pid = pid;
 342       if (!sync)
 343       {
 344         data->process = process;
 345       }
 346       else
 347       {
 348         data->process = (wxProcess *) NULL;
 349         data->pid = -(data->pid);
 350
 351         while (data->pid != 0)
 352           wxYield();
 353
 354         delete data;
 355       }
 356
 357       // @@@ our return value indicates success even if execvp() in the child
 358       //     failed!
 359       return pid;
 360     }
 361 }
 362
 363 long wxExecute( const wxString& command, bool sync, wxProcess *process )
 364 {
 365     static const char *IFS = " \t\n";
 366
 367     wxCHECK_MSG( !command.IsEmpty(), 0, "can't exec empty command" );
 368
 369     int argc = 0;
 370     char *argv[127];
 371     char *tmp = new char[command.Len() + 1];
 372     strcpy(tmp, command);
 373
 374     argv[argc++] = strtok(tmp, IFS);
 375     while ((argv[argc++] = strtok((char *) NULL, IFS)) != NULL)
 376         /* loop */ ;
 377
 378     long lRc = wxExecute(argv, sync, process);
 379
 380     delete [] tmp;
 381
 382     return lRc;
 383 }