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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 "wx/process.h"
22
23 #include <stdarg.h>
24 #include <dirent.h>
25 #include <string.h>
26 #include <sys/stat.h>
27 #include <sys/types.h>
28 #include <unistd.h>
29 #include <sys/wait.h>
30 #include <pwd.h>
31 #include <errno.h>
32 #include <netdb.h>
33 #include <signal.h>
34 #include <fcntl.h> // for O_WRONLY and friends
35
36 #include "glib.h"
37 #include "gdk/gdk.h"
38 #include "gtk/gtk.h"
39 #include "gtk/gtkfeatures.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 gdk_window_get_pointer( (GdkWindow*) NULL, x, y, (GdkModifierType*) NULL );
83 }
84
85 bool wxColourDisplay(void)
86 {
87 return TRUE;
88 }
89
90 int wxDisplayDepth(void)
91 {
92 return gdk_window_get_visual( (GdkWindow*) &gdk_root_parent )->depth;
93 }
94
95 int wxGetOsVersion(int *majorVsn, int *minorVsn)
96 {
97 if (majorVsn) *majorVsn = GTK_MAJOR_VERSION;
98 if (minorVsn) *minorVsn = GTK_MINOR_VERSION;
99
100 return wxGTK;
101 }
102
103 //------------------------------------------------------------------------
104 // user and home routines
105 //------------------------------------------------------------------------
106
107 const char* wxGetHomeDir( wxString *home )
108 {
109 *home = wxGetUserHome( wxString() );
110 if (home->IsNull()) *home = "/";
111 return *home;
112 }
113
114 char *wxGetUserHome( const wxString &user )
115 {
116 struct passwd *who = (struct passwd *) NULL;
117
118 if (user.IsNull() || (user== ""))
119 {
120 register char *ptr;
121
122 if ((ptr = getenv("HOME")) != NULL)
123 {
124 return ptr;
125 }
126 if ((ptr = getenv("USER")) != NULL || (ptr = getenv("LOGNAME")) != NULL)
127 {
128 who = getpwnam(ptr);
129 }
130
131 /* We now make sure the the user exists! */
132 if (who == NULL)
133 {
134 who = getpwuid(getuid());
135 }
136 }
137 else
138 {
139 who = getpwnam (user);
140 }
141
142 return who ? who->pw_dir : (char*)NULL;
143 }
144
145 //------------------------------------------------------------------------
146 // id routines
147 //------------------------------------------------------------------------
148
149 bool wxGetHostName(char *buf, int sz)
150 {
151 *buf = '\0';
152 #if defined(__SVR4__) && !defined(__sgi)
153 //KB: does this return the fully qualified host.domain name?
154 return (sysinfo(SI_HOSTNAME, buf, sz) != -1);
155 #else /* BSD Sockets */
156 char name[255], domain[255];
157 //struct hostent *h;
158 // Get hostname
159 if (gethostname(name, sizeof(name)/sizeof(char)-1) == -1)
160 return FALSE;
161 if (getdomainname(domain, sizeof(domain)/sizeof(char)-1) == -1)
162 return FALSE;
163 // Get official full name of host
164 // doesn't return the full qualified name, replaced by following
165 // code (KB)
166 // strncpy(buf, (h=gethostbyname(name))!=NULL ? h->h_name : name, sz-1);
167 if((unsigned)sz > strlen(name)+strlen(domain)+1)
168 {
169 strcpy(buf, name);
170 if(strcmp(domain,"(none)") == 0) // standalone machine
171 {
172 strcat(buf,".");
173 strcat(buf,domain);
174 }
175 }
176 else
177 return FALSE;
178 return TRUE;
179 #endif
180 }
181
182 bool wxGetUserId(char *buf, int sz)
183 {
184 struct passwd *who;
185
186 *buf = '\0';
187 if ((who = getpwuid(getuid ())) != NULL) {
188 strncpy (buf, who->pw_name, sz-1);
189 return TRUE;
190 }
191 return FALSE;
192 }
193
194 bool wxGetUserName(char *buf, int sz)
195 {
196 struct passwd *who;
197 char *comma;
198
199 *buf = '\0';
200 if ((who = getpwuid (getuid ())) != NULL) {
201 comma = strchr(who->pw_gecos,'c');
202 if(comma) *comma = '\0'; // cut off non-name comment fields
203 strncpy (buf, who->pw_gecos, sz - 1);
204 return TRUE;
205 }
206 return FALSE;
207 }
208
209 //------------------------------------------------------------------------
210 // error and debug output routines
211 //------------------------------------------------------------------------
212
213 void wxDebugMsg( const char *format, ... )
214 {
215 va_list ap;
216 va_start( ap, format );
217 vfprintf( stderr, format, ap );
218 fflush( stderr );
219 va_end(ap);
220 }
221
222 void wxError( const wxString &msg, const wxString &title )
223 {
224 fprintf( stderr, "Error " );
225 if (!title.IsNull()) fprintf( stderr, "%s ", WXSTRINGCAST(title) );
226 if (!msg.IsNull()) fprintf( stderr, ": %s", WXSTRINGCAST(msg) );
227 fprintf( stderr, ".\n" );
228 }
229
230 void wxFatalError( const wxString &msg, const wxString &title )
231 {
232 fprintf( stderr, "Error " );
233 if (!title.IsNull()) fprintf( stderr, "%s ", WXSTRINGCAST(title) );
234 if (!msg.IsNull()) fprintf( stderr, ": %s", WXSTRINGCAST(msg) );
235 fprintf( stderr, ".\n" );
236 exit(3); // the same exit code as for abort()
237 }
238
239 //------------------------------------------------------------------------
240 // directory routines
241 //------------------------------------------------------------------------
242
243 bool wxDirExists( const wxString& dir )
244 {
245 char buf[500];
246 strcpy( buf, WXSTRINGCAST(dir) );
247 struct stat sbuf;
248 return ((stat(buf, &sbuf) != -1) && S_ISDIR(sbuf.st_mode) ? TRUE : FALSE);
249 }
250
251 //------------------------------------------------------------------------
252 // subprocess routines
253 //------------------------------------------------------------------------
254
255 // if pid > 0, the execution is async and the data is freed in
256 // GTK_EndProcessDetector, if pid < 0, the execution is synchronous and the
257 // caller (wxExecute) frees the data
258 struct wxEndProcessData
259 {
260 gint pid, tag;
261 wxProcess *process;
262 int exitcode;
263 };
264
265 static void GTK_EndProcessDetector(gpointer data, gint source,
266 GdkInputCondition WXUNUSED(condition) )
267 {
268 wxEndProcessData *proc_data = (wxEndProcessData *)data;
269 int pid;
270
271 pid = (proc_data->pid > 0) ? proc_data->pid : -(proc_data->pid);
272
273 /* wait4 is not part of any standard, use at own risk
274 * not sure what wait4 does, but wait3 seems to be closest, whats a digit ;-)
275 * --- offer@sgi.com */
276 // VZ: wait4() will be woken up by a signal, not wait3 - so it's quite
277 // different (also, wait3() waits for any child, wait4() only for this
278 // one)
279 int status = -1;
280 #if !defined(__sgi)
281 wait4(pid, &status, 0, (rusage *) NULL);
282 #else
283 wait3(&status, 0, (rusage *) NULL);
284 #endif
285
286 close(source);
287 gdk_input_remove(proc_data->tag);
288
289 if (proc_data->process)
290 proc_data->process->OnTerminate(proc_data->pid, status);
291
292 if (proc_data->pid > 0)
293 {
294 delete proc_data;
295 }
296 else
297 {
298 // wxExecute() will know about it
299 proc_data->exitcode = status;
300
301 proc_data->pid = 0;
302 }
303 }
304
305 long wxExecute( char **argv, bool sync, wxProcess *process )
306 {
307 wxEndProcessData *data = new wxEndProcessData;
308 int end_proc_detect[2];
309
310 wxCHECK_MSG( *argv, 0, "can't exec empty command" );
311
312 /* Create pipes */
313 if (pipe(end_proc_detect) == -1)
314 {
315 wxLogSysError( _("Pipe creation failed") );
316 return 0;
317 }
318
319 /* fork the process */
320 #if defined(sun) || defined(__ultrix) || defined(__bsdi__)
321 pid_t pid = vfork();
322 #else
323 pid_t pid = fork();
324 #endif
325 if (pid == -1)
326 {
327 wxLogSysError( _("Fork failed") );
328 return 0;
329 }
330 else if (pid == 0)
331 {
332 // we're in child
333 close(end_proc_detect[0]); // close reading side
334
335 // These three lines close the open file descriptors to to avoid any
336 // input/output which might block the process or irritate the user. If
337 // one wants proper IO for the subprocess, the "right thing to do is
338 // to start an xterm executing it.
339 close(STDIN_FILENO);
340 close(STDOUT_FILENO);
341
342 // leave stderr opened, it won't do any hurm
343 #if 0
344 close(STDERR_FILENO);
345
346 // some programs complain about stderr not being open, so redirect
347 // them:
348 open("/dev/null", O_RDONLY); // stdin
349 open("/dev/null", O_WRONLY); // stdout
350 open("/dev/null", O_WRONLY); // stderr
351 #endif
352
353 #ifdef _AIX
354 execvp ((const char *)*argv, (const char **)argv);
355 #else
356 execvp (*argv, argv);
357 #endif
358
359 // there is no return after successful exec()
360 fprintf(stderr, _("Can't execute '%s'\n"), *argv);
361
362 _exit(-1);
363 }
364 else
365 {
366 // we're in parent
367 close(end_proc_detect[1]); // close writing side
368 data->tag = gdk_input_add(end_proc_detect[0], GDK_INPUT_READ,
369 GTK_EndProcessDetector, (gpointer)data);
370 if ( sync )
371 {
372 wxASSERT_MSG( !process, "wxProcess param ignored for sync exec" );
373 data->process = NULL;
374
375 // sync execution: indicate it by negating the pid
376 data->pid = -pid;
377
378 // it will be set to 0 from GTK_EndProcessDetector
379 while (data->pid != 0)
380 wxYield();
381
382 int exitcode = data->exitcode;
383
384 delete data;
385
386 return exitcode;
387 }
388 else
389 {
390 // async execution, nothing special to do - caller will be
391 // notified about the process terminationif process != NULL, data
392 // will be deleted in GTK_EndProcessDetector
393 data->process = process;
394 data->pid = pid;
395
396 return pid;
397 }
398 }
399 }
400
401 long wxExecute( const wxString& command, bool sync, wxProcess *process )
402 {
403 static const char *IFS = " \t\n";
404
405 wxCHECK_MSG( !command.IsEmpty(), 0, "can't exec empty command" );
406
407 int argc = 0;
408 char *argv[127];
409 char *tmp = new char[command.Len() + 1];
410 strcpy(tmp, command);
411
412 argv[argc++] = strtok(tmp, IFS);
413 while ((argv[argc++] = strtok((char *) NULL, IFS)) != NULL)
414 /* loop */ ;
415
416 long lRc = wxExecute(argv, sync, process);
417
418 delete [] tmp;
419
420 return lRc;
421 }