1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1998 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GLib Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GLib at ftp://ftp.gtk.org/pub/gtk/.
28 * MT safe for the unix part, FIXME: make the win32 part MT safe as well.
41 #include <ctype.h> /* For tolower() */
43 #include <sys/types.h>
48 #include <sys/types.h>
49 #ifdef HAVE_SYS_PARAM_H
50 #include <sys/param.h>
52 #ifdef HAVE_CRT_EXTERNS_H
53 #include <crt_externs.h> /* for _NSGetEnviron */
56 /* implement gutils's inline functions
58 #define G_IMPLEMENT_INLINES 1
62 #include "glib-init.h"
63 #include "glib-private.h"
65 #include "gfileutils.h"
69 #include "gtestutils.h"
71 #include "gstrfuncs.h"
75 #ifdef G_PLATFORM_WIN32
83 * @title: Miscellaneous Utility Functions
84 * @short_description: a selection of portable utility functions
86 * These are portable utility functions.
89 #ifdef G_PLATFORM_WIN32
91 # ifndef GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
92 # define GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT 2
93 # define GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS 4
95 # include <lmcons.h> /* For UNLEN */
96 #endif /* G_PLATFORM_WIN32 */
101 /* older SDK (e.g. msvc 5.0) does not have these*/
102 # ifndef CSIDL_MYMUSIC
103 # define CSIDL_MYMUSIC 13
105 # ifndef CSIDL_MYVIDEO
106 # define CSIDL_MYVIDEO 14
108 # ifndef CSIDL_INTERNET_CACHE
109 # define CSIDL_INTERNET_CACHE 32
111 # ifndef CSIDL_COMMON_APPDATA
112 # define CSIDL_COMMON_APPDATA 35
114 # ifndef CSIDL_MYPICTURES
115 # define CSIDL_MYPICTURES 0x27
117 # ifndef CSIDL_COMMON_DOCUMENTS
118 # define CSIDL_COMMON_DOCUMENTS 46
120 # ifndef CSIDL_PROFILE
121 # define CSIDL_PROFILE 40
123 # include <process.h>
127 #include <CoreServices/CoreServices.h>
131 #include <langinfo.h>
134 #ifdef G_PLATFORM_WIN32
137 _glib_get_dll_directory (void)
141 wchar_t wc_fn[MAX_PATH];
144 if (glib_dll == NULL)
148 /* This code is different from that in
149 * g_win32_get_package_installation_directory_of_module() in that
150 * here we return the actual folder where the GLib DLL is. We don't
151 * do the check for it being in a "bin" or "lib" subfolder and then
152 * returning the parent of that.
154 * In a statically built GLib, glib_dll will be NULL and we will
155 * thus look up the application's .exe file's location.
157 if (!GetModuleFileNameW (glib_dll, wc_fn, MAX_PATH))
160 retval = g_utf16_to_utf8 (wc_fn, -1, NULL, NULL, NULL);
162 p = strrchr (retval, G_DIR_SEPARATOR);
175 #if !defined (HAVE_MEMMOVE) && !defined (HAVE_WORKING_BCOPY)
178 * @dest: the destination address to copy the bytes to.
179 * @src: the source address to copy the bytes from.
180 * @len: the number of bytes to copy.
182 * Copies a block of memory @len bytes long, from @src to @dest.
183 * The source and destination areas may overlap.
185 * In order to use this function, you must include
186 * <filename>string.h</filename> yourself, because this macro will
187 * typically simply resolve to memmove() and GLib does not include
188 * <filename>string.h</filename> for you.
191 g_memmove (gpointer dest,
195 gchar* destptr = dest;
196 const gchar* srcptr = src;
197 if (src + len < dest || dest + len < src)
199 bcopy (src, dest, len);
202 else if (dest <= src)
205 *(destptr++) = *(srcptr++);
212 *(--destptr) = *(--srcptr);
215 #endif /* !HAVE_MEMMOVE && !HAVE_WORKING_BCOPY */
223 * @func: (scope async): the function to call on normal program termination.
225 * Specifies a function to be called at normal program termination.
227 * Since GLib 2.8.2, on Windows g_atexit() actually is a preprocessor
228 * macro that maps to a call to the atexit() function in the C
229 * library. This means that in case the code that calls g_atexit(),
230 * i.e. atexit(), is in a DLL, the function will be called when the
231 * DLL is detached from the program. This typically makes more sense
232 * than that the function is called when the GLib DLL is detached,
233 * which happened earlier when g_atexit() was a function in the GLib
236 * The behaviour of atexit() in the context of dynamically loaded
237 * modules is not formally specified and varies wildly.
239 * On POSIX systems, calling g_atexit() (or atexit()) in a dynamically
240 * loaded module which is unloaded before the program terminates might
241 * well cause a crash at program exit.
243 * Some POSIX systems implement atexit() like Windows, and have each
244 * dynamically loaded module maintain an own atexit chain that is
245 * called when the module is unloaded.
247 * On other POSIX systems, before a dynamically loaded module is
248 * unloaded, the registered atexit functions (if any) residing in that
249 * module are called, regardless where the code that registered them
250 * resided. This is presumably the most robust approach.
252 * As can be seen from the above, for portability it's best to avoid
253 * calling g_atexit() (or atexit()) except in the main executable of a
256 * Deprecated:2.32: It is best to avoid g_atexit().
259 g_atexit (GVoidFunc func)
262 const gchar *error = NULL;
264 /* keep this in sync with glib.h */
266 #ifdef G_NATIVE_ATEXIT
267 result = ATEXIT (func);
269 error = g_strerror (errno);
270 #elif defined (HAVE_ATEXIT)
271 # ifdef NeXT /* @#%@! NeXTStep */
272 result = !atexit ((void (*)(void)) func);
274 error = g_strerror (errno);
276 result = atexit ((void (*)(void)) func);
278 error = g_strerror (errno);
280 #elif defined (HAVE_ON_EXIT)
281 result = on_exit ((void (*)(int, void *)) func, NULL);
283 error = g_strerror (errno);
286 error = "no implementation";
287 #endif /* G_NATIVE_ATEXIT */
290 g_error ("Could not register atexit() function: %s", error);
293 /* Based on execvp() from GNU Libc.
294 * Some of this code is cut-and-pasted into gspawn.c
298 my_strchrnul (const gchar *str,
301 gchar *p = (gchar*)str;
302 while (*p && (*p != c))
310 static gchar *inner_find_program_in_path (const gchar *program);
313 g_find_program_in_path (const gchar *program)
315 const gchar *last_dot = strrchr (program, '.');
317 if (last_dot == NULL ||
318 strchr (last_dot, '\\') != NULL ||
319 strchr (last_dot, '/') != NULL)
321 const gint program_length = strlen (program);
322 gchar *pathext = g_build_path (";",
323 ".exe;.cmd;.bat;.com",
324 g_getenv ("PATHEXT"),
327 gchar *decorated_program;
333 gchar *q = my_strchrnul (p, ';');
335 decorated_program = g_malloc (program_length + (q-p) + 1);
336 memcpy (decorated_program, program, program_length);
337 memcpy (decorated_program+program_length, p, q-p);
338 decorated_program [program_length + (q-p)] = '\0';
340 retval = inner_find_program_in_path (decorated_program);
341 g_free (decorated_program);
349 } while (*p++ != '\0');
354 return inner_find_program_in_path (program);
360 * g_find_program_in_path:
361 * @program: a program name in the GLib file name encoding
363 * Locates the first executable named @program in the user's path, in the
364 * same way that execvp() would locate it. Returns an allocated string
365 * with the absolute path name, or %NULL if the program is not found in
366 * the path. If @program is already an absolute path, returns a copy of
367 * @program if @program exists and is executable, and %NULL otherwise.
369 * On Windows, if @program does not have a file type suffix, tries
370 * with the suffixes .exe, .cmd, .bat and .com, and the suffixes in
371 * the <envar>PATHEXT</envar> environment variable.
373 * On Windows, it looks for the file in the same way as CreateProcess()
374 * would. This means first in the directory where the executing
375 * program was loaded from, then in the current directory, then in the
376 * Windows 32-bit system directory, then in the Windows directory, and
377 * finally in the directories in the <envar>PATH</envar> environment
378 * variable. If the program is found, the return value contains the
379 * full name including the type suffix.
381 * Return value: a newly-allocated string with the absolute path, or %NULL
385 inner_find_program_in_path (const gchar *program)
388 g_find_program_in_path (const gchar *program)
391 const gchar *path, *p;
392 gchar *name, *freeme;
394 const gchar *path_copy;
395 gchar *filename = NULL, *appdir = NULL;
396 gchar *sysdir = NULL, *windir = NULL;
398 wchar_t wfilename[MAXPATHLEN], wsysdir[MAXPATHLEN],
404 g_return_val_if_fail (program != NULL, NULL);
406 /* If it is an absolute path, or a relative path including subdirectories,
407 * don't look in PATH.
409 if (g_path_is_absolute (program)
410 || strchr (program, G_DIR_SEPARATOR) != NULL
412 || strchr (program, '/') != NULL
416 if (g_file_test (program, G_FILE_TEST_IS_EXECUTABLE) &&
417 !g_file_test (program, G_FILE_TEST_IS_DIR))
418 return g_strdup (program);
423 path = g_getenv ("PATH");
424 #if defined(G_OS_UNIX) || defined(G_OS_BEOS)
427 /* There is no `PATH' in the environment. The default
428 * search path in GNU libc is the current directory followed by
429 * the path `confstr' returns for `_CS_PATH'.
432 /* In GLib we put . last, for security, and don't use the
433 * unportable confstr(); UNIX98 does not actually specify
434 * what to search if PATH is unset. POSIX may, dunno.
437 path = "/bin:/usr/bin:.";
440 n = GetModuleFileNameW (NULL, wfilename, MAXPATHLEN);
441 if (n > 0 && n < MAXPATHLEN)
442 filename = g_utf16_to_utf8 (wfilename, -1, NULL, NULL, NULL);
444 n = GetSystemDirectoryW (wsysdir, MAXPATHLEN);
445 if (n > 0 && n < MAXPATHLEN)
446 sysdir = g_utf16_to_utf8 (wsysdir, -1, NULL, NULL, NULL);
448 n = GetWindowsDirectoryW (wwindir, MAXPATHLEN);
449 if (n > 0 && n < MAXPATHLEN)
450 windir = g_utf16_to_utf8 (wwindir, -1, NULL, NULL, NULL);
454 appdir = g_path_get_dirname (filename);
458 path = g_strdup (path);
462 const gchar *tem = path;
463 path = g_strconcat (windir, ";", path, NULL);
464 g_free ((gchar *) tem);
470 const gchar *tem = path;
471 path = g_strconcat (sysdir, ";", path, NULL);
472 g_free ((gchar *) tem);
477 const gchar *tem = path;
478 path = g_strconcat (".;", path, NULL);
479 g_free ((gchar *) tem);
484 const gchar *tem = path;
485 path = g_strconcat (appdir, ";", path, NULL);
486 g_free ((gchar *) tem);
493 len = strlen (program) + 1;
494 pathlen = strlen (path);
495 freeme = name = g_malloc (pathlen + len + 1);
497 /* Copy the file name at the top, including '\0' */
498 memcpy (name + pathlen + 1, program, len);
499 name = name + pathlen;
500 /* And add the slash before the filename */
501 *name = G_DIR_SEPARATOR;
509 p = my_strchrnul (path, G_SEARCHPATH_SEPARATOR);
512 /* Two adjacent colons, or a colon at the beginning or the end
513 * of `PATH' means to search the current directory.
517 startp = memcpy (name - (p - path), path, p - path);
519 if (g_file_test (startp, G_FILE_TEST_IS_EXECUTABLE) &&
520 !g_file_test (startp, G_FILE_TEST_IS_DIR))
523 ret = g_strdup (startp);
526 g_free ((gchar *) path_copy);
531 while (*p++ != '\0');
535 g_free ((gchar *) path_copy);
543 * @mask: a #gulong containing flags
544 * @nth_bit: the index of the bit to start the search from
546 * Find the position of the first bit set in @mask, searching
547 * from (but not including) @nth_bit upwards. Bits are numbered
548 * from 0 (least significant) to sizeof(#gulong) * 8 - 1 (31 or 63,
549 * usually). To start searching from the 0th bit, set @nth_bit to -1.
551 * Returns: the index of the first bit set which is higher than @nth_bit
556 * @mask: a #gulong containing flags
557 * @nth_bit: the index of the bit to start the search from
559 * Find the position of the first bit set in @mask, searching
560 * from (but not including) @nth_bit downwards. Bits are numbered
561 * from 0 (least significant) to sizeof(#gulong) * 8 - 1 (31 or 63,
562 * usually). To start searching from the last bit, set @nth_bit to
563 * -1 or GLIB_SIZEOF_LONG * 8.
565 * Returns: the index of the first bit set which is lower than @nth_bit
572 * Gets the number of bits used to hold @number,
573 * e.g. if @number is 4, 3 bits are needed.
575 * Returns: the number of bits used to hold @number
578 G_LOCK_DEFINE_STATIC (g_utils_global);
587 static gchar *g_user_data_dir = NULL;
588 static gchar **g_system_data_dirs = NULL;
589 static gchar *g_user_cache_dir = NULL;
590 static gchar *g_user_config_dir = NULL;
591 static gchar **g_system_config_dirs = NULL;
593 static gchar **g_user_special_dirs = NULL;
595 /* fifteen minutes of fame for everybody */
596 #define G_USER_DIRS_EXPIRE 15 * 60
601 get_special_folder (int csidl)
603 wchar_t path[MAX_PATH+1];
605 LPITEMIDLIST pidl = NULL;
607 gchar *retval = NULL;
609 hr = SHGetSpecialFolderLocation (NULL, csidl, &pidl);
612 b = SHGetPathFromIDListW (pidl, path);
614 retval = g_utf16_to_utf8 (path, -1, NULL, NULL, NULL);
615 CoTaskMemFree (pidl);
621 get_windows_directory_root (void)
623 wchar_t wwindowsdir[MAX_PATH];
625 if (GetWindowsDirectoryW (wwindowsdir, G_N_ELEMENTS (wwindowsdir)))
627 /* Usually X:\Windows, but in terminal server environments
628 * might be an UNC path, AFAIK.
630 char *windowsdir = g_utf16_to_utf8 (wwindowsdir, -1, NULL, NULL, NULL);
633 if (windowsdir == NULL)
634 return g_strdup ("C:\\");
636 p = (char *) g_path_skip_root (windowsdir);
637 if (G_IS_DIR_SEPARATOR (p[-1]) && p[-2] != ':')
643 return g_strdup ("C:\\");
648 /* HOLDS: g_utils_global_lock */
649 static UserDatabaseEntry *
650 g_get_user_database_entry (void)
652 static UserDatabaseEntry *entry;
654 if (g_once_init_enter (&entry))
656 static UserDatabaseEntry e;
660 struct passwd *pw = NULL;
661 gpointer buffer = NULL;
665 # if defined (HAVE_POSIX_GETPWUID_R) || defined (HAVE_NONPOSIX_GETPWUID_R)
667 # ifdef _SC_GETPW_R_SIZE_MAX
668 /* This reurns the maximum length */
669 glong bufsize = sysconf (_SC_GETPW_R_SIZE_MAX);
673 # else /* _SC_GETPW_R_SIZE_MAX */
675 # endif /* _SC_GETPW_R_SIZE_MAX */
677 logname = (gchar *) g_getenv ("LOGNAME");
682 /* we allocate 6 extra bytes to work around a bug in
683 * Mac OS < 10.3. See #156446
685 buffer = g_malloc (bufsize + 6);
688 # ifdef HAVE_POSIX_GETPWUID_R
690 error = getpwnam_r (logname, &pwd, buffer, bufsize, &pw);
691 if (!pw || (pw->pw_uid != getuid ())) {
692 /* LOGNAME is lying, fall back to looking up the uid */
693 error = getpwuid_r (getuid (), &pwd, buffer, bufsize, &pw);
696 error = getpwuid_r (getuid (), &pwd, buffer, bufsize, &pw);
698 error = error < 0 ? errno : error;
699 # else /* HAVE_NONPOSIX_GETPWUID_R */
700 /* HPUX 11 falls into the HAVE_POSIX_GETPWUID_R case */
701 # if defined(_AIX) || defined(__hpux)
702 error = getpwuid_r (getuid (), &pwd, buffer, bufsize);
703 pw = error == 0 ? &pwd : NULL;
706 pw = getpwnam_r (logname, &pwd, buffer, bufsize);
707 if (!pw || (pw->pw_uid != getuid ())) {
708 /* LOGNAME is lying, fall back to looking up the uid */
709 pw = getpwuid_r (getuid (), &pwd, buffer, bufsize);
712 pw = getpwuid_r (getuid (), &pwd, buffer, bufsize);
714 error = pw ? 0 : errno;
716 # endif /* HAVE_NONPOSIX_GETPWUID_R */
720 /* we bail out prematurely if the user id can't be found
721 * (should be pretty rare case actually), or if the buffer
722 * should be sufficiently big and lookups are still not
725 if (error == 0 || error == ENOENT)
727 g_warning ("getpwuid_r(): failed due to unknown user id (%lu)",
731 if (bufsize > 32 * 1024)
733 g_warning ("getpwuid_r(): failed due to: %s.",
742 # endif /* HAVE_POSIX_GETPWUID_R || HAVE_NONPOSIX_GETPWUID_R */
749 pw = getpwuid (getuid ());
756 e.user_name = g_strdup (pw->pw_name);
759 if (pw->pw_gecos && *pw->pw_gecos != '\0')
761 gchar **gecos_fields;
764 /* split the gecos field and substitute '&' */
765 gecos_fields = g_strsplit (pw->pw_gecos, ",", 0);
766 name_parts = g_strsplit (gecos_fields[0], "&", 0);
767 pw->pw_name[0] = g_ascii_toupper (pw->pw_name[0]);
768 e.real_name = g_strjoinv (pw->pw_name, name_parts);
769 g_strfreev (gecos_fields);
770 g_strfreev (name_parts);
775 e.home_dir = g_strdup (pw->pw_dir);
780 #else /* !HAVE_PWD_H */
785 wchar_t buffer[UNLEN+1];
787 if (GetUserNameW (buffer, (LPDWORD) &len))
789 e.user_name = g_utf16_to_utf8 (buffer, -1, NULL, NULL, NULL);
790 e.real_name = g_strdup (e.user_name);
793 #endif /* G_OS_WIN32 */
795 #endif /* !HAVE_PWD_H */
798 /* change '\\' in %HOME% to '/' */
799 g_strdelimit (e.home_dir, "\\",'/');
802 e.user_name = g_strdup ("somebody");
804 e.real_name = g_strdup ("Unknown");
806 g_once_init_leave (&entry, &e);
815 * Gets the user name of the current user. The encoding of the returned
816 * string is system-defined. On UNIX, it might be the preferred file name
817 * encoding, or something else, and there is no guarantee that it is even
818 * consistent on a machine. On Windows, it is always UTF-8.
820 * Returns: the user name of the current user.
823 g_get_user_name (void)
825 UserDatabaseEntry *entry;
827 entry = g_get_user_database_entry ();
829 return entry->user_name;
835 * Gets the real name of the user. This usually comes from the user's entry
836 * in the <filename>passwd</filename> file. The encoding of the returned
837 * string is system-defined. (On Windows, it is, however, always UTF-8.)
838 * If the real user name cannot be determined, the string "Unknown" is
841 * Returns: the user's real name.
844 g_get_real_name (void)
846 UserDatabaseEntry *entry;
848 entry = g_get_user_database_entry ();
850 return entry->real_name;
856 * Gets the current user's home directory.
858 * As with most UNIX tools, this function will return the value of the
859 * <envar>HOME</envar> environment variable if it is set to an existing
860 * absolute path name, falling back to the <filename>passwd</filename>
861 * file in the case that it is unset.
863 * If the path given in <envar>HOME</envar> is non-absolute, does not
864 * exist, or is not a directory, the result is undefined.
867 * Before version 2.36 this function would ignore the
868 * <envar>HOME</envar> environment variable, taking the value from the
869 * <filename>passwd</filename> database instead. This was changed to
870 * increase the compatibility of GLib with other programs (and the XDG
871 * basedir specification) and to increase testability of programs
872 * based on GLib (by making it easier to run them from test
875 * If your program has a strong requirement for either the new or the
876 * old behaviour (and if you don't wish to increase your GLib
877 * dependency to ensure that the new behaviour is in effect) then you
878 * should either directly check the <envar>HOME</envar> environment
879 * variable yourself or unset it before calling any functions in GLib.
882 * Returns: the current user's home directory
885 g_get_home_dir (void)
887 static gchar *home_dir;
889 if (g_once_init_enter (&home_dir))
893 /* We first check HOME and use it if it is set */
894 tmp = g_strdup (g_getenv ("HOME"));
897 /* Only believe HOME if it is an absolute path and exists.
899 * We only do this check on Windows for a couple of reasons.
900 * Historically, we only did it there because we used to ignore $HOME
901 * on UNIX. There are concerns about enabling it now on UNIX because
902 * of things like autofs. In short, if the user has a bogus value in
903 * $HOME then they get what they pay for...
907 if (!(g_path_is_absolute (tmp) &&
908 g_file_test (tmp, G_FILE_TEST_IS_DIR)))
915 /* In case HOME is Unix-style (it happens), convert it to
921 while ((p = strchr (tmp, '/')) != NULL)
927 /* USERPROFILE is probably the closest equivalent to $HOME? */
928 if (g_getenv ("USERPROFILE") != NULL)
929 tmp = g_strdup (g_getenv ("USERPROFILE"));
933 tmp = get_special_folder (CSIDL_PROFILE);
936 tmp = get_windows_directory_root ();
937 #endif /* G_OS_WIN32 */
941 /* If we didn't get it from any of those methods, we will have
942 * to read the user database entry.
944 UserDatabaseEntry *entry;
946 entry = g_get_user_database_entry ();
948 /* Strictly speaking, we should copy this, but we know that
949 * neither will ever be freed, so don't bother...
951 tmp = entry->home_dir;
954 g_once_init_leave (&home_dir, tmp);
963 * Gets the directory to use for temporary files. This is found from
964 * inspecting the environment variables <envar>TMPDIR</envar>,
965 * <envar>TMP</envar>, and <envar>TEMP</envar> in that order. If none
966 * of those are defined "/tmp" is returned on UNIX and "C:\" on Windows.
967 * The encoding of the returned string is system-defined. On Windows,
968 * it is always UTF-8. The return value is never %NULL or the empty string.
970 * Returns: the directory to use for temporary files.
975 static gchar *tmp_dir;
977 if (g_once_init_enter (&tmp_dir))
981 tmp = g_strdup (g_getenv ("TMPDIR"));
983 if (tmp == NULL || *tmp == '\0')
986 tmp = g_strdup (g_getenv ("TMP"));
989 if (tmp == NULL || *tmp == '\0')
992 tmp = g_strdup (g_getenv ("TEMP"));
996 if (tmp == NULL || *tmp == '\0')
999 tmp = get_windows_directory_root ();
1004 if (tmp == NULL || *tmp == '\0')
1008 tmp = g_strdup (P_tmpdir);
1010 if (k > 1 && G_IS_DIR_SEPARATOR (tmp[k - 1]))
1015 if (tmp == NULL || *tmp == '\0')
1018 tmp = g_strdup ("/tmp");
1020 #endif /* !G_OS_WIN32 */
1022 g_once_init_leave (&tmp_dir, tmp);
1031 * Return a name for the machine.
1033 * The returned name is not necessarily a fully-qualified domain name,
1034 * or even present in DNS or some other name service at all. It need
1035 * not even be unique on your local network or site, but usually it
1036 * is. Callers should not rely on the return value having any specific
1037 * properties like uniqueness for security purposes. Even if the name
1038 * of the machine is changed while an application is running, the
1039 * return value from this function does not change. The returned
1040 * string is owned by GLib and should not be modified or freed. If no
1041 * name can be determined, a default fixed string "localhost" is
1044 * Returns: the host name of the machine.
1049 g_get_host_name (void)
1051 static gchar *hostname;
1053 if (g_once_init_enter (&hostname))
1059 failed = (gethostname (tmp, sizeof (tmp)) == -1);
1061 DWORD size = sizeof (tmp);
1062 failed = (!GetComputerName (tmp, &size));
1065 g_once_init_leave (&hostname, g_strdup (failed ? "localhost" : tmp));
1071 G_LOCK_DEFINE_STATIC (g_prgname);
1072 static gchar *g_prgname = NULL;
1077 * Gets the name of the program. This name should <emphasis>not</emphasis>
1078 * be localized, contrast with g_get_application_name().
1079 * (If you are using GDK or GTK+ the program name is set in gdk_init(),
1080 * which is called by gtk_init(). The program name is found by taking
1081 * the last component of <literal>argv[0]</literal>.)
1083 * Returns: the name of the program. The returned string belongs
1084 * to GLib and must not be modified or freed.
1087 g_get_prgname (void)
1093 if (g_prgname == NULL)
1095 static gboolean beenhere = FALSE;
1099 gchar *utf8_buf = NULL;
1100 wchar_t buf[MAX_PATH+1];
1103 if (GetModuleFileNameW (GetModuleHandle (NULL),
1104 buf, G_N_ELEMENTS (buf)) > 0)
1105 utf8_buf = g_utf16_to_utf8 (buf, -1, NULL, NULL, NULL);
1109 g_prgname = g_path_get_basename (utf8_buf);
1116 G_UNLOCK (g_prgname);
1123 * @prgname: the name of the program.
1125 * Sets the name of the program. This name should <emphasis>not</emphasis>
1126 * be localized, contrast with g_set_application_name(). Note that for
1127 * thread-safety reasons this function can only be called once.
1130 g_set_prgname (const gchar *prgname)
1134 g_prgname = g_strdup (prgname);
1135 G_UNLOCK (g_prgname);
1138 G_LOCK_DEFINE_STATIC (g_application_name);
1139 static gchar *g_application_name = NULL;
1142 * g_get_application_name:
1144 * Gets a human-readable name for the application, as set by
1145 * g_set_application_name(). This name should be localized if
1146 * possible, and is intended for display to the user. Contrast with
1147 * g_get_prgname(), which gets a non-localized name. If
1148 * g_set_application_name() has not been called, returns the result of
1149 * g_get_prgname() (which may be %NULL if g_set_prgname() has also not
1152 * Return value: human-readable application name. may return %NULL
1157 g_get_application_name (void)
1161 G_LOCK (g_application_name);
1162 retval = g_application_name;
1163 G_UNLOCK (g_application_name);
1166 return g_get_prgname ();
1172 * g_set_application_name:
1173 * @application_name: localized name of the application
1175 * Sets a human-readable name for the application. This name should be
1176 * localized if possible, and is intended for display to the user.
1177 * Contrast with g_set_prgname(), which sets a non-localized name.
1178 * g_set_prgname() will be called automatically by gtk_init(),
1179 * but g_set_application_name() will not.
1181 * Note that for thread safety reasons, this function can only
1184 * The application name will be used in contexts such as error messages,
1185 * or when displaying an application's name in the task list.
1190 g_set_application_name (const gchar *application_name)
1192 gboolean already_set = FALSE;
1194 G_LOCK (g_application_name);
1195 if (g_application_name)
1198 g_application_name = g_strdup (application_name);
1199 G_UNLOCK (g_application_name);
1202 g_warning ("g_set_application_name() called multiple times");
1206 * g_get_user_data_dir:
1208 * Returns a base directory in which to access application data such
1209 * as icons that is customized for a particular user.
1211 * On UNIX platforms this is determined using the mechanisms described in
1212 * the <ulink url="http://www.freedesktop.org/Standards/basedir-spec">
1213 * XDG Base Directory Specification</ulink>.
1214 * In this case the directory retrieved will be XDG_DATA_HOME.
1216 * On Windows this is the folder to use for local (as opposed to
1217 * roaming) application data. See documentation for
1218 * CSIDL_LOCAL_APPDATA. Note that on Windows it thus is the same as
1219 * what g_get_user_config_dir() returns.
1221 * Return value: a string owned by GLib that must not be modified
1226 g_get_user_data_dir (void)
1230 G_LOCK (g_utils_global);
1232 if (!g_user_data_dir)
1235 data_dir = get_special_folder (CSIDL_LOCAL_APPDATA);
1237 data_dir = (gchar *) g_getenv ("XDG_DATA_HOME");
1239 if (data_dir && data_dir[0])
1240 data_dir = g_strdup (data_dir);
1242 if (!data_dir || !data_dir[0])
1244 const gchar *home_dir = g_get_home_dir ();
1247 data_dir = g_build_filename (home_dir, ".local", "share", NULL);
1249 data_dir = g_build_filename (g_get_tmp_dir (), g_get_user_name (), ".local", "share", NULL);
1252 g_user_data_dir = data_dir;
1255 data_dir = g_user_data_dir;
1257 G_UNLOCK (g_utils_global);
1263 g_init_user_config_dir (void)
1267 if (!g_user_config_dir)
1270 config_dir = get_special_folder (CSIDL_LOCAL_APPDATA);
1272 config_dir = (gchar *) g_getenv ("XDG_CONFIG_HOME");
1274 if (config_dir && config_dir[0])
1275 config_dir = g_strdup (config_dir);
1277 if (!config_dir || !config_dir[0])
1279 const gchar *home_dir = g_get_home_dir ();
1282 config_dir = g_build_filename (home_dir, ".config", NULL);
1284 config_dir = g_build_filename (g_get_tmp_dir (), g_get_user_name (), ".config", NULL);
1287 g_user_config_dir = config_dir;
1292 * g_get_user_config_dir:
1294 * Returns a base directory in which to store user-specific application
1295 * configuration information such as user preferences and settings.
1297 * On UNIX platforms this is determined using the mechanisms described in
1298 * the <ulink url="http://www.freedesktop.org/Standards/basedir-spec">
1299 * XDG Base Directory Specification</ulink>.
1300 * In this case the directory retrieved will be XDG_CONFIG_HOME.
1302 * On Windows this is the folder to use for local (as opposed to
1303 * roaming) application data. See documentation for
1304 * CSIDL_LOCAL_APPDATA. Note that on Windows it thus is the same as
1305 * what g_get_user_data_dir() returns.
1307 * Return value: a string owned by GLib that must not be modified
1312 g_get_user_config_dir (void)
1314 G_LOCK (g_utils_global);
1316 g_init_user_config_dir ();
1318 G_UNLOCK (g_utils_global);
1320 return g_user_config_dir;
1324 * g_get_user_cache_dir:
1326 * Returns a base directory in which to store non-essential, cached
1327 * data specific to particular user.
1329 * On UNIX platforms this is determined using the mechanisms described in
1330 * the <ulink url="http://www.freedesktop.org/Standards/basedir-spec">
1331 * XDG Base Directory Specification</ulink>.
1332 * In this case the directory retrieved will be XDG_CACHE_HOME.
1334 * On Windows is the directory that serves as a common repository for
1335 * temporary Internet files. A typical path is
1336 * C:\Documents and Settings\username\Local Settings\Temporary Internet Files.
1337 * See documentation for CSIDL_INTERNET_CACHE.
1339 * Return value: a string owned by GLib that must not be modified
1344 g_get_user_cache_dir (void)
1348 G_LOCK (g_utils_global);
1350 if (!g_user_cache_dir)
1353 cache_dir = get_special_folder (CSIDL_INTERNET_CACHE); /* XXX correct? */
1355 cache_dir = (gchar *) g_getenv ("XDG_CACHE_HOME");
1357 if (cache_dir && cache_dir[0])
1358 cache_dir = g_strdup (cache_dir);
1360 if (!cache_dir || !cache_dir[0])
1362 const gchar *home_dir = g_get_home_dir ();
1365 cache_dir = g_build_filename (home_dir, ".cache", NULL);
1367 cache_dir = g_build_filename (g_get_tmp_dir (), g_get_user_name (), ".cache", NULL);
1369 g_user_cache_dir = cache_dir;
1372 cache_dir = g_user_cache_dir;
1374 G_UNLOCK (g_utils_global);
1380 * g_get_user_runtime_dir:
1382 * Returns a directory that is unique to the current user on the local
1385 * On UNIX platforms this is determined using the mechanisms described in
1386 * the <ulink url="http://www.freedesktop.org/Standards/basedir-spec">
1387 * XDG Base Directory Specification</ulink>. This is the directory
1388 * specified in the <envar>XDG_RUNTIME_DIR</envar> environment variable.
1389 * In the case that this variable is not set, GLib will issue a warning
1390 * message to stderr and return the value of g_get_user_cache_dir().
1392 * On Windows this is the folder to use for local (as opposed to
1393 * roaming) application data. See documentation for
1394 * CSIDL_LOCAL_APPDATA. Note that on Windows it thus is the same as
1395 * what g_get_user_config_dir() returns.
1397 * Returns: a string owned by GLib that must not be modified or freed.
1402 g_get_user_runtime_dir (void)
1405 static const gchar *runtime_dir;
1406 static gsize initialised;
1408 if (g_once_init_enter (&initialised))
1410 runtime_dir = g_strdup (getenv ("XDG_RUNTIME_DIR"));
1412 g_once_init_leave (&initialised, 1);
1418 /* Both fallback for UNIX and the default
1419 * in Windows: use the user cache directory.
1423 return g_get_user_cache_dir ();
1429 find_folder (OSType type)
1431 gchar *filename = NULL;
1434 if (FSFindFolder (kUserDomain, type, kDontCreateFolder, &found) == noErr)
1436 CFURLRef url = CFURLCreateFromFSRef (kCFAllocatorSystemDefault, &found);
1440 CFStringRef path = CFURLCopyFileSystemPath (url, kCFURLPOSIXPathStyle);
1444 filename = g_strdup (CFStringGetCStringPtr (path, kCFStringEncodingUTF8));
1448 filename = g_new0 (gchar, CFStringGetLength (path) * 3 + 1);
1450 CFStringGetCString (path, filename,
1451 CFStringGetLength (path) * 3 + 1,
1452 kCFStringEncodingUTF8);
1466 load_user_special_dirs (void)
1468 g_user_special_dirs[G_USER_DIRECTORY_DESKTOP] = find_folder (kDesktopFolderType);
1469 g_user_special_dirs[G_USER_DIRECTORY_DOCUMENTS] = find_folder (kDocumentsFolderType);
1470 g_user_special_dirs[G_USER_DIRECTORY_DOWNLOAD] = find_folder (kDesktopFolderType); /* XXX correct ? */
1471 g_user_special_dirs[G_USER_DIRECTORY_MUSIC] = find_folder (kMusicDocumentsFolderType);
1472 g_user_special_dirs[G_USER_DIRECTORY_PICTURES] = find_folder (kPictureDocumentsFolderType);
1473 g_user_special_dirs[G_USER_DIRECTORY_PUBLIC_SHARE] = NULL;
1474 g_user_special_dirs[G_USER_DIRECTORY_TEMPLATES] = NULL;
1475 g_user_special_dirs[G_USER_DIRECTORY_VIDEOS] = find_folder (kMovieDocumentsFolderType);
1478 #endif /* HAVE_CARBON */
1480 #if defined(G_OS_WIN32)
1482 load_user_special_dirs (void)
1484 typedef HRESULT (WINAPI *t_SHGetKnownFolderPath) (const GUID *rfid,
1488 t_SHGetKnownFolderPath p_SHGetKnownFolderPath;
1490 static const GUID FOLDERID_Downloads =
1491 { 0x374de290, 0x123f, 0x4565, { 0x91, 0x64, 0x39, 0xc4, 0x92, 0x5e, 0x46, 0x7b } };
1492 static const GUID FOLDERID_Public =
1493 { 0xDFDF76A2, 0xC82A, 0x4D63, { 0x90, 0x6A, 0x56, 0x44, 0xAC, 0x45, 0x73, 0x85 } };
1497 p_SHGetKnownFolderPath = (t_SHGetKnownFolderPath) GetProcAddress (GetModuleHandle ("shell32.dll"),
1498 "SHGetKnownFolderPath");
1500 g_user_special_dirs[G_USER_DIRECTORY_DESKTOP] = get_special_folder (CSIDL_DESKTOPDIRECTORY);
1501 g_user_special_dirs[G_USER_DIRECTORY_DOCUMENTS] = get_special_folder (CSIDL_PERSONAL);
1503 if (p_SHGetKnownFolderPath == NULL)
1505 g_user_special_dirs[G_USER_DIRECTORY_DOWNLOAD] = get_special_folder (CSIDL_DESKTOPDIRECTORY);
1510 (*p_SHGetKnownFolderPath) (&FOLDERID_Downloads, 0, NULL, &wcp);
1513 g_user_special_dirs[G_USER_DIRECTORY_DOWNLOAD] = g_utf16_to_utf8 (wcp, -1, NULL, NULL, NULL);
1514 if (g_user_special_dirs[G_USER_DIRECTORY_DOWNLOAD] == NULL)
1515 g_user_special_dirs[G_USER_DIRECTORY_DOWNLOAD] = get_special_folder (CSIDL_DESKTOPDIRECTORY);
1516 CoTaskMemFree (wcp);
1519 g_user_special_dirs[G_USER_DIRECTORY_DOWNLOAD] = get_special_folder (CSIDL_DESKTOPDIRECTORY);
1522 g_user_special_dirs[G_USER_DIRECTORY_MUSIC] = get_special_folder (CSIDL_MYMUSIC);
1523 g_user_special_dirs[G_USER_DIRECTORY_PICTURES] = get_special_folder (CSIDL_MYPICTURES);
1525 if (p_SHGetKnownFolderPath == NULL)
1528 g_user_special_dirs[G_USER_DIRECTORY_PUBLIC_SHARE] = get_special_folder (CSIDL_COMMON_DOCUMENTS);
1533 (*p_SHGetKnownFolderPath) (&FOLDERID_Public, 0, NULL, &wcp);
1536 g_user_special_dirs[G_USER_DIRECTORY_PUBLIC_SHARE] = g_utf16_to_utf8 (wcp, -1, NULL, NULL, NULL);
1537 if (g_user_special_dirs[G_USER_DIRECTORY_PUBLIC_SHARE] == NULL)
1538 g_user_special_dirs[G_USER_DIRECTORY_PUBLIC_SHARE] = get_special_folder (CSIDL_COMMON_DOCUMENTS);
1539 CoTaskMemFree (wcp);
1542 g_user_special_dirs[G_USER_DIRECTORY_PUBLIC_SHARE] = get_special_folder (CSIDL_COMMON_DOCUMENTS);
1545 g_user_special_dirs[G_USER_DIRECTORY_TEMPLATES] = get_special_folder (CSIDL_TEMPLATES);
1546 g_user_special_dirs[G_USER_DIRECTORY_VIDEOS] = get_special_folder (CSIDL_MYVIDEO);
1548 #endif /* G_OS_WIN32 */
1550 static void g_init_user_config_dir (void);
1552 #if defined(G_OS_UNIX) && !defined(HAVE_CARBON)
1554 /* adapted from xdg-user-dir-lookup.c
1556 * Copyright (C) 2007 Red Hat Inc.
1558 * Permission is hereby granted, free of charge, to any person
1559 * obtaining a copy of this software and associated documentation files
1560 * (the "Software"), to deal in the Software without restriction,
1561 * including without limitation the rights to use, copy, modify, merge,
1562 * publish, distribute, sublicense, and/or sell copies of the Software,
1563 * and to permit persons to whom the Software is furnished to do so,
1564 * subject to the following conditions:
1566 * The above copyright notice and this permission notice shall be
1567 * included in all copies or substantial portions of the Software.
1569 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
1570 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
1571 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
1572 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
1573 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
1574 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
1575 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
1579 load_user_special_dirs (void)
1586 g_init_user_config_dir ();
1587 config_file = g_build_filename (g_user_config_dir,
1591 if (!g_file_get_contents (config_file, &data, NULL, NULL))
1593 g_free (config_file);
1597 lines = g_strsplit (data, "\n", -1);
1598 n_lines = g_strv_length (lines);
1601 for (i = 0; i < n_lines; i++)
1603 gchar *buffer = lines[i];
1606 gboolean is_relative = FALSE;
1607 GUserDirectory directory;
1609 /* Remove newline at end */
1610 len = strlen (buffer);
1611 if (len > 0 && buffer[len - 1] == '\n')
1612 buffer[len - 1] = 0;
1615 while (*p == ' ' || *p == '\t')
1618 if (strncmp (p, "XDG_DESKTOP_DIR", strlen ("XDG_DESKTOP_DIR")) == 0)
1620 directory = G_USER_DIRECTORY_DESKTOP;
1621 p += strlen ("XDG_DESKTOP_DIR");
1623 else if (strncmp (p, "XDG_DOCUMENTS_DIR", strlen ("XDG_DOCUMENTS_DIR")) == 0)
1625 directory = G_USER_DIRECTORY_DOCUMENTS;
1626 p += strlen ("XDG_DOCUMENTS_DIR");
1628 else if (strncmp (p, "XDG_DOWNLOAD_DIR", strlen ("XDG_DOWNLOAD_DIR")) == 0)
1630 directory = G_USER_DIRECTORY_DOWNLOAD;
1631 p += strlen ("XDG_DOWNLOAD_DIR");
1633 else if (strncmp (p, "XDG_MUSIC_DIR", strlen ("XDG_MUSIC_DIR")) == 0)
1635 directory = G_USER_DIRECTORY_MUSIC;
1636 p += strlen ("XDG_MUSIC_DIR");
1638 else if (strncmp (p, "XDG_PICTURES_DIR", strlen ("XDG_PICTURES_DIR")) == 0)
1640 directory = G_USER_DIRECTORY_PICTURES;
1641 p += strlen ("XDG_PICTURES_DIR");
1643 else if (strncmp (p, "XDG_PUBLICSHARE_DIR", strlen ("XDG_PUBLICSHARE_DIR")) == 0)
1645 directory = G_USER_DIRECTORY_PUBLIC_SHARE;
1646 p += strlen ("XDG_PUBLICSHARE_DIR");
1648 else if (strncmp (p, "XDG_TEMPLATES_DIR", strlen ("XDG_TEMPLATES_DIR")) == 0)
1650 directory = G_USER_DIRECTORY_TEMPLATES;
1651 p += strlen ("XDG_TEMPLATES_DIR");
1653 else if (strncmp (p, "XDG_VIDEOS_DIR", strlen ("XDG_VIDEOS_DIR")) == 0)
1655 directory = G_USER_DIRECTORY_VIDEOS;
1656 p += strlen ("XDG_VIDEOS_DIR");
1661 while (*p == ' ' || *p == '\t')
1668 while (*p == ' ' || *p == '\t')
1675 if (strncmp (p, "$HOME", 5) == 0)
1683 d = strrchr (p, '"');
1690 /* remove trailing slashes */
1692 if (d[len - 1] == '/')
1697 g_user_special_dirs[directory] = g_build_filename (g_get_home_dir (), d, NULL);
1700 g_user_special_dirs[directory] = g_strdup (d);
1704 g_free (config_file);
1707 #endif /* G_OS_UNIX && !HAVE_CARBON */
1711 * g_reload_user_special_dirs_cache:
1713 * Resets the cache used for g_get_user_special_dir(), so
1714 * that the latest on-disk version is used. Call this only
1715 * if you just changed the data on disk yourself.
1717 * Due to threadsafety issues this may cause leaking of strings
1718 * that were previously returned from g_get_user_special_dir()
1719 * that can't be freed. We ensure to only leak the data for
1720 * the directories that actually changed value though.
1725 g_reload_user_special_dirs_cache (void)
1729 G_LOCK (g_utils_global);
1731 if (g_user_special_dirs != NULL)
1733 /* save a copy of the pointer, to check if some memory can be preserved */
1734 char **old_g_user_special_dirs = g_user_special_dirs;
1737 /* recreate and reload our cache */
1738 g_user_special_dirs = g_new0 (gchar *, G_USER_N_DIRECTORIES);
1739 load_user_special_dirs ();
1741 /* only leak changed directories */
1742 for (i = 0; i < G_USER_N_DIRECTORIES; i++)
1744 old_val = old_g_user_special_dirs[i];
1745 if (g_user_special_dirs[i] == NULL)
1747 g_user_special_dirs[i] = old_val;
1749 else if (g_strcmp0 (old_val, g_user_special_dirs[i]) == 0)
1752 g_free (g_user_special_dirs[i]);
1753 g_user_special_dirs[i] = old_val;
1759 /* free the old array */
1760 g_free (old_g_user_special_dirs);
1763 G_UNLOCK (g_utils_global);
1767 * g_get_user_special_dir:
1768 * @directory: the logical id of special directory
1770 * Returns the full path of a special directory using its logical id.
1772 * On Unix this is done using the XDG special user directories.
1773 * For compatibility with existing practise, %G_USER_DIRECTORY_DESKTOP
1774 * falls back to <filename>$HOME/Desktop</filename> when XDG special
1775 * user directories have not been set up.
1777 * Depending on the platform, the user might be able to change the path
1778 * of the special directory without requiring the session to restart; GLib
1779 * will not reflect any change once the special directories are loaded.
1781 * Return value: the path to the specified special directory, or %NULL
1782 * if the logical id was not found. The returned string is owned by
1783 * GLib and should not be modified or freed.
1788 g_get_user_special_dir (GUserDirectory directory)
1790 g_return_val_if_fail (directory >= G_USER_DIRECTORY_DESKTOP &&
1791 directory < G_USER_N_DIRECTORIES, NULL);
1793 G_LOCK (g_utils_global);
1795 if (G_UNLIKELY (g_user_special_dirs == NULL))
1797 g_user_special_dirs = g_new0 (gchar *, G_USER_N_DIRECTORIES);
1799 load_user_special_dirs ();
1801 /* Special-case desktop for historical compatibility */
1802 if (g_user_special_dirs[G_USER_DIRECTORY_DESKTOP] == NULL)
1803 g_user_special_dirs[G_USER_DIRECTORY_DESKTOP] = g_build_filename (g_get_home_dir (), "Desktop", NULL);
1806 G_UNLOCK (g_utils_global);
1808 return g_user_special_dirs[directory];
1813 #undef g_get_system_data_dirs
1816 get_module_for_address (gconstpointer address)
1818 /* Holds the g_utils_global lock */
1820 static gboolean beenhere = FALSE;
1821 typedef BOOL (WINAPI *t_GetModuleHandleExA) (DWORD, LPCTSTR, HMODULE *);
1822 static t_GetModuleHandleExA p_GetModuleHandleExA = NULL;
1823 HMODULE hmodule = NULL;
1830 p_GetModuleHandleExA =
1831 (t_GetModuleHandleExA) GetProcAddress (GetModuleHandle ("kernel32.dll"),
1832 "GetModuleHandleExA");
1836 if (p_GetModuleHandleExA == NULL ||
1837 !(*p_GetModuleHandleExA) (GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT |
1838 GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
1841 MEMORY_BASIC_INFORMATION mbi;
1842 VirtualQuery (address, &mbi, sizeof (mbi));
1843 hmodule = (HMODULE) mbi.AllocationBase;
1850 get_module_share_dir (gconstpointer address)
1856 hmodule = get_module_for_address (address);
1857 if (hmodule == NULL)
1860 filename = g_win32_get_package_installation_directory_of_module (hmodule);
1861 retval = g_build_filename (filename, "share", NULL);
1867 const gchar * const *
1868 g_win32_get_system_data_dirs_for_module (void (*address_of_function)(void))
1872 static GHashTable *per_module_data_dirs = NULL;
1877 if (address_of_function)
1879 G_LOCK (g_utils_global);
1880 hmodule = get_module_for_address (address_of_function);
1881 if (hmodule != NULL)
1883 if (per_module_data_dirs == NULL)
1884 per_module_data_dirs = g_hash_table_new (NULL, NULL);
1887 retval = g_hash_table_lookup (per_module_data_dirs, hmodule);
1891 G_UNLOCK (g_utils_global);
1892 return (const gchar * const *) retval;
1898 data_dirs = g_array_new (TRUE, TRUE, sizeof (char *));
1900 /* Documents and Settings\All Users\Application Data */
1901 p = get_special_folder (CSIDL_COMMON_APPDATA);
1903 g_array_append_val (data_dirs, p);
1905 /* Documents and Settings\All Users\Documents */
1906 p = get_special_folder (CSIDL_COMMON_DOCUMENTS);
1908 g_array_append_val (data_dirs, p);
1910 /* Using the above subfolders of Documents and Settings perhaps
1911 * makes sense from a Windows perspective.
1913 * But looking at the actual use cases of this function in GTK+
1914 * and GNOME software, what we really want is the "share"
1915 * subdirectory of the installation directory for the package
1916 * our caller is a part of.
1918 * The address_of_function parameter, if non-NULL, points to a
1919 * function in the calling module. Use that to determine that
1920 * module's installation folder, and use its "share" subfolder.
1922 * Additionally, also use the "share" subfolder of the installation
1923 * locations of GLib and the .exe file being run.
1925 * To guard against none of the above being what is really wanted,
1926 * callers of this function should have Win32-specific code to look
1927 * up their installation folder themselves, and handle a subfolder
1928 * "share" of it in the same way as the folders returned from this
1932 p = get_module_share_dir (address_of_function);
1934 g_array_append_val (data_dirs, p);
1936 if (glib_dll != NULL)
1938 gchar *glib_root = g_win32_get_package_installation_directory_of_module (glib_dll);
1939 p = g_build_filename (glib_root, "share", NULL);
1941 g_array_append_val (data_dirs, p);
1945 exe_root = g_win32_get_package_installation_directory_of_module (NULL);
1946 p = g_build_filename (exe_root, "share", NULL);
1948 g_array_append_val (data_dirs, p);
1951 retval = (gchar **) g_array_free (data_dirs, FALSE);
1953 if (address_of_function)
1955 if (hmodule != NULL)
1956 g_hash_table_insert (per_module_data_dirs, hmodule, retval);
1957 G_UNLOCK (g_utils_global);
1960 return (const gchar * const *) retval;
1966 * g_get_system_data_dirs:
1968 * Returns an ordered list of base directories in which to access
1969 * system-wide application data.
1971 * On UNIX platforms this is determined using the mechanisms described in
1972 * the <ulink url="http://www.freedesktop.org/Standards/basedir-spec">
1973 * XDG Base Directory Specification</ulink>
1974 * In this case the list of directories retrieved will be XDG_DATA_DIRS.
1976 * On Windows the first elements in the list are the Application Data
1977 * and Documents folders for All Users. (These can be determined only
1978 * on Windows 2000 or later and are not present in the list on other
1979 * Windows versions.) See documentation for CSIDL_COMMON_APPDATA and
1980 * CSIDL_COMMON_DOCUMENTS.
1982 * Then follows the "share" subfolder in the installation folder for
1983 * the package containing the DLL that calls this function, if it can
1986 * Finally the list contains the "share" subfolder in the installation
1987 * folder for GLib, and in the installation folder for the package the
1988 * application's .exe file belongs to.
1990 * The installation folders above are determined by looking up the
1991 * folder where the module (DLL or EXE) in question is located. If the
1992 * folder's name is "bin", its parent is used, otherwise the folder
1995 * Note that on Windows the returned list can vary depending on where
1996 * this function is called.
1998 * Return value: (array zero-terminated=1) (transfer none): a %NULL-terminated array of strings owned by GLib that must
1999 * not be modified or freed.
2002 const gchar * const *
2003 g_get_system_data_dirs (void)
2005 gchar **data_dir_vector;
2007 G_LOCK (g_utils_global);
2009 if (!g_system_data_dirs)
2012 data_dir_vector = (gchar **) g_win32_get_system_data_dirs_for_module (NULL);
2014 gchar *data_dirs = (gchar *) g_getenv ("XDG_DATA_DIRS");
2016 if (!data_dirs || !data_dirs[0])
2017 data_dirs = "/usr/local/share/:/usr/share/";
2019 data_dir_vector = g_strsplit (data_dirs, G_SEARCHPATH_SEPARATOR_S, 0);
2022 g_system_data_dirs = data_dir_vector;
2025 data_dir_vector = g_system_data_dirs;
2027 G_UNLOCK (g_utils_global);
2029 return (const gchar * const *) data_dir_vector;
2033 * g_get_system_config_dirs:
2035 * Returns an ordered list of base directories in which to access
2036 * system-wide configuration information.
2038 * On UNIX platforms this is determined using the mechanisms described in
2039 * the <ulink url="http://www.freedesktop.org/Standards/basedir-spec">
2040 * XDG Base Directory Specification</ulink>.
2041 * In this case the list of directories retrieved will be XDG_CONFIG_DIRS.
2043 * On Windows is the directory that contains application data for all users.
2044 * A typical path is C:\Documents and Settings\All Users\Application Data.
2045 * This folder is used for application data that is not user specific.
2046 * For example, an application can store a spell-check dictionary, a database
2047 * of clip art, or a log file in the CSIDL_COMMON_APPDATA folder.
2048 * This information will not roam and is available to anyone using the computer.
2050 * Return value: (array zero-terminated=1) (transfer none): a %NULL-terminated array of strings owned by GLib that must
2051 * not be modified or freed.
2054 const gchar * const *
2055 g_get_system_config_dirs (void)
2057 gchar *conf_dirs, **conf_dir_vector;
2059 G_LOCK (g_utils_global);
2061 if (!g_system_config_dirs)
2064 conf_dirs = get_special_folder (CSIDL_COMMON_APPDATA);
2067 conf_dir_vector = g_strsplit (conf_dirs, G_SEARCHPATH_SEPARATOR_S, 0);
2072 /* Return empty list */
2073 conf_dir_vector = g_strsplit ("", G_SEARCHPATH_SEPARATOR_S, 0);
2076 conf_dirs = (gchar *) g_getenv ("XDG_CONFIG_DIRS");
2078 if (!conf_dirs || !conf_dirs[0])
2079 conf_dirs = "/etc/xdg";
2081 conf_dir_vector = g_strsplit (conf_dirs, G_SEARCHPATH_SEPARATOR_S, 0);
2084 g_system_config_dirs = conf_dir_vector;
2087 conf_dir_vector = g_system_config_dirs;
2088 G_UNLOCK (g_utils_global);
2090 return (const gchar * const *) conf_dir_vector;
2094 * g_nullify_pointer:
2095 * @nullify_location: the memory address of the pointer.
2097 * Set the pointer at the specified location to %NULL.
2100 g_nullify_pointer (gpointer *nullify_location)
2102 g_return_if_fail (nullify_location != NULL);
2104 *nullify_location = NULL;
2107 #define KILOBYTE_FACTOR (G_GOFFSET_CONSTANT (1000))
2108 #define MEGABYTE_FACTOR (KILOBYTE_FACTOR * KILOBYTE_FACTOR)
2109 #define GIGABYTE_FACTOR (MEGABYTE_FACTOR * KILOBYTE_FACTOR)
2110 #define TERABYTE_FACTOR (GIGABYTE_FACTOR * KILOBYTE_FACTOR)
2111 #define PETABYTE_FACTOR (TERABYTE_FACTOR * KILOBYTE_FACTOR)
2112 #define EXABYTE_FACTOR (PETABYTE_FACTOR * KILOBYTE_FACTOR)
2114 #define KIBIBYTE_FACTOR (G_GOFFSET_CONSTANT (1024))
2115 #define MEBIBYTE_FACTOR (KIBIBYTE_FACTOR * KIBIBYTE_FACTOR)
2116 #define GIBIBYTE_FACTOR (MEBIBYTE_FACTOR * KIBIBYTE_FACTOR)
2117 #define TEBIBYTE_FACTOR (GIBIBYTE_FACTOR * KIBIBYTE_FACTOR)
2118 #define PEBIBYTE_FACTOR (TEBIBYTE_FACTOR * KIBIBYTE_FACTOR)
2119 #define EXBIBYTE_FACTOR (PEBIBYTE_FACTOR * KIBIBYTE_FACTOR)
2123 * @size: a size in bytes
2125 * Formats a size (for example the size of a file) into a human readable
2126 * string. Sizes are rounded to the nearest size prefix (kB, MB, GB)
2127 * and are displayed rounded to the nearest tenth. E.g. the file size
2128 * 3292528 bytes will be converted into the string "3.2 MB".
2130 * The prefix units base is 1000 (i.e. 1 kB is 1000 bytes).
2132 * This string should be freed with g_free() when not needed any longer.
2134 * See g_format_size_full() for more options about how the size might be
2137 * Returns: a newly-allocated formatted string containing a human readable
2143 g_format_size (guint64 size)
2145 return g_format_size_full (size, G_FORMAT_SIZE_DEFAULT);
2150 * @G_FORMAT_SIZE_DEFAULT: behave the same as g_format_size()
2151 * @G_FORMAT_SIZE_LONG_FORMAT: include the exact number of bytes as part
2152 * of the returned string. For example, "45.6 kB (45,612 bytes)".
2153 * @G_FORMAT_SIZE_IEC_UNITS: use IEC (base 1024) units with "KiB"-style
2154 * suffixes. IEC units should only be used for reporting things with
2155 * a strong "power of 2" basis, like RAM sizes or RAID stripe sizes.
2156 * Network and storage sizes should be reported in the normal SI units.
2158 * Flags to modify the format of the string returned by g_format_size_full().
2162 * g_format_size_full:
2163 * @size: a size in bytes
2164 * @flags: #GFormatSizeFlags to modify the output
2168 * This function is similar to g_format_size() but allows for flags
2169 * that modify the output. See #GFormatSizeFlags.
2171 * Returns: a newly-allocated formatted string containing a human
2172 * readable file size
2177 g_format_size_full (guint64 size,
2178 GFormatSizeFlags flags)
2182 string = g_string_new (NULL);
2184 if (flags & G_FORMAT_SIZE_IEC_UNITS)
2186 if (size < KIBIBYTE_FACTOR)
2188 g_string_printf (string,
2189 g_dngettext(GETTEXT_PACKAGE, "%u byte", "%u bytes", (guint) size),
2191 flags &= ~G_FORMAT_SIZE_LONG_FORMAT;
2194 else if (size < MEBIBYTE_FACTOR)
2195 g_string_printf (string, _("%.1f KiB"), (gdouble) size / (gdouble) KIBIBYTE_FACTOR);
2196 else if (size < GIBIBYTE_FACTOR)
2197 g_string_printf (string, _("%.1f MiB"), (gdouble) size / (gdouble) MEBIBYTE_FACTOR);
2199 else if (size < TEBIBYTE_FACTOR)
2200 g_string_printf (string, _("%.1f GiB"), (gdouble) size / (gdouble) GIBIBYTE_FACTOR);
2202 else if (size < PEBIBYTE_FACTOR)
2203 g_string_printf (string, _("%.1f TiB"), (gdouble) size / (gdouble) TEBIBYTE_FACTOR);
2205 else if (size < EXBIBYTE_FACTOR)
2206 g_string_printf (string, _("%.1f PiB"), (gdouble) size / (gdouble) PEBIBYTE_FACTOR);
2209 g_string_printf (string, _("%.1f EiB"), (gdouble) size / (gdouble) EXBIBYTE_FACTOR);
2213 if (size < KILOBYTE_FACTOR)
2215 g_string_printf (string,
2216 g_dngettext(GETTEXT_PACKAGE, "%u byte", "%u bytes", (guint) size),
2218 flags &= ~G_FORMAT_SIZE_LONG_FORMAT;
2221 else if (size < MEGABYTE_FACTOR)
2222 g_string_printf (string, _("%.1f kB"), (gdouble) size / (gdouble) KILOBYTE_FACTOR);
2224 else if (size < GIGABYTE_FACTOR)
2225 g_string_printf (string, _("%.1f MB"), (gdouble) size / (gdouble) MEGABYTE_FACTOR);
2227 else if (size < TERABYTE_FACTOR)
2228 g_string_printf (string, _("%.1f GB"), (gdouble) size / (gdouble) GIGABYTE_FACTOR);
2229 else if (size < PETABYTE_FACTOR)
2230 g_string_printf (string, _("%.1f TB"), (gdouble) size / (gdouble) TERABYTE_FACTOR);
2232 else if (size < EXABYTE_FACTOR)
2233 g_string_printf (string, _("%.1f PB"), (gdouble) size / (gdouble) PETABYTE_FACTOR);
2236 g_string_printf (string, _("%.1f EB"), (gdouble) size / (gdouble) EXABYTE_FACTOR);
2239 if (flags & G_FORMAT_SIZE_LONG_FORMAT)
2241 /* First problem: we need to use the number of bytes to decide on
2242 * the plural form that is used for display, but the number of
2243 * bytes potentially exceeds the size of a guint (which is what
2244 * ngettext() takes).
2246 * From a pragmatic standpoint, it seems that all known languages
2247 * base plural forms on one or both of the following:
2249 * - the lowest digits of the number
2251 * - if the number if greater than some small value
2253 * Here's how we fake it: Draw an arbitrary line at one thousand.
2254 * If the number is below that, then fine. If it is above it,
2255 * then we take the modulus of the number by one thousand (in
2256 * order to keep the lowest digits) and add one thousand to that
2257 * (in order to ensure that 1001 is not treated the same as 1).
2259 guint plural_form = size < 1000 ? size : size % 1000 + 1000;
2261 /* Second problem: we need to translate the string "%u byte" and
2262 * "%u bytes" for pluralisation, but the correct number format to
2263 * use for a gsize is different depending on which architecture
2266 * Solution: format the number separately and use "%s bytes" on
2269 const gchar *translated_format;
2270 gchar *formatted_number;
2272 /* Translators: the %s in "%s bytes" will always be replaced by a number. */
2273 translated_format = g_dngettext(GETTEXT_PACKAGE, "%s byte", "%s bytes", plural_form);
2274 /* XXX: Windows doesn't support the "'" format modifier, so we
2275 * must not use it there. Instead, just display the number
2276 * without separation. Bug #655336 is open until a solution is
2280 formatted_number = g_strdup_printf ("%'"G_GUINT64_FORMAT, size);
2282 formatted_number = g_strdup_printf ("%"G_GUINT64_FORMAT, size);
2285 g_string_append (string, " (");
2286 g_string_append_printf (string, translated_format, formatted_number);
2287 g_free (formatted_number);
2288 g_string_append (string, ")");
2291 return g_string_free (string, FALSE);
2295 * g_format_size_for_display:
2296 * @size: a size in bytes
2298 * Formats a size (for example the size of a file) into a human
2299 * readable string. Sizes are rounded to the nearest size prefix
2300 * (KB, MB, GB) and are displayed rounded to the nearest tenth.
2301 * E.g. the file size 3292528 bytes will be converted into the
2304 * The prefix units base is 1024 (i.e. 1 KB is 1024 bytes).
2306 * This string should be freed with g_free() when not needed any longer.
2308 * Returns: a newly-allocated formatted string containing a human
2309 * readable file size
2313 * Deprecated:2.30: This function is broken due to its use of SI
2314 * suffixes to denote IEC units. Use g_format_size() instead.
2317 g_format_size_for_display (goffset size)
2319 if (size < (goffset) KIBIBYTE_FACTOR)
2320 return g_strdup_printf (g_dngettext(GETTEXT_PACKAGE, "%u byte", "%u bytes",(guint) size), (guint) size);
2323 gdouble displayed_size;
2325 if (size < (goffset) MEBIBYTE_FACTOR)
2327 displayed_size = (gdouble) size / (gdouble) KIBIBYTE_FACTOR;
2328 /* Translators: this is from the deprecated function g_format_size_for_display() which uses 'KB' to
2329 * mean 1024 bytes. I am aware that 'KB' is not correct, but it has been preserved for reasons of
2330 * compatibility. Users will not see this string unless a program is using this deprecated function.
2331 * Please translate as literally as possible.
2333 return g_strdup_printf (_("%.1f KB"), displayed_size);
2335 else if (size < (goffset) GIBIBYTE_FACTOR)
2337 displayed_size = (gdouble) size / (gdouble) MEBIBYTE_FACTOR;
2338 return g_strdup_printf (_("%.1f MB"), displayed_size);
2340 else if (size < (goffset) TEBIBYTE_FACTOR)
2342 displayed_size = (gdouble) size / (gdouble) GIBIBYTE_FACTOR;
2343 return g_strdup_printf (_("%.1f GB"), displayed_size);
2345 else if (size < (goffset) PEBIBYTE_FACTOR)
2347 displayed_size = (gdouble) size / (gdouble) TEBIBYTE_FACTOR;
2348 return g_strdup_printf (_("%.1f TB"), displayed_size);
2350 else if (size < (goffset) EXBIBYTE_FACTOR)
2352 displayed_size = (gdouble) size / (gdouble) PEBIBYTE_FACTOR;
2353 return g_strdup_printf (_("%.1f PB"), displayed_size);
2357 displayed_size = (gdouble) size / (gdouble) EXBIBYTE_FACTOR;
2358 return g_strdup_printf (_("%.1f EB"), displayed_size);
2363 #if defined (G_OS_WIN32) && !defined (_WIN64)
2365 /* Binary compatibility versions. Not for newly compiled code. */
2367 _GLIB_EXTERN const gchar *g_get_user_name_utf8 (void);
2368 _GLIB_EXTERN const gchar *g_get_real_name_utf8 (void);
2369 _GLIB_EXTERN const gchar *g_get_home_dir_utf8 (void);
2370 _GLIB_EXTERN const gchar *g_get_tmp_dir_utf8 (void);
2371 _GLIB_EXTERN gchar *g_find_program_in_path_utf8 (const gchar *program);
2374 g_find_program_in_path_utf8 (const gchar *program)
2376 return g_find_program_in_path (program);
2379 const gchar *g_get_user_name_utf8 (void) { return g_get_user_name (); }
2380 const gchar *g_get_real_name_utf8 (void) { return g_get_real_name (); }
2381 const gchar *g_get_home_dir_utf8 (void) { return g_get_home_dir (); }
2382 const gchar *g_get_tmp_dir_utf8 (void) { return g_get_tmp_dir (); }
2388 * Returns %TRUE if the current process was executed as setuid (or an
2389 * equivalent __libc_enable_secure is available). See:
2390 * http://osdir.com/ml/linux.lfs.hardened/2007-04/msg00032.html
2393 g_check_setuid (void)
2395 /* TODO: get __libc_enable_secure exported from glibc.
2396 * See http://www.openwall.com/lists/owl-dev/2012/08/14/1
2398 #if 0 && defined(HAVE_LIBC_ENABLE_SECURE)
2400 /* See glibc/include/unistd.h */
2401 extern int __libc_enable_secure;
2402 return __libc_enable_secure;
2404 #elif defined(HAVE_ISSETUGID)
2405 /* BSD: http://www.freebsd.org/cgi/man.cgi?query=issetugid&sektion=2 */
2406 return issetugid ();
2407 #elif defined(G_OS_UNIX)
2408 uid_t ruid, euid, suid; /* Real, effective and saved user ID's */
2409 gid_t rgid, egid, sgid; /* Real, effective and saved group ID's */
2411 static gsize check_setuid_initialised;
2412 static gboolean is_setuid;
2414 if (g_once_init_enter (&check_setuid_initialised))
2416 #ifdef HAVE_GETRESUID
2417 /* These aren't in the header files, so we prototype them here.
2419 int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid);
2420 int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);
2422 if (getresuid (&ruid, &euid, &suid) != 0 ||
2423 getresgid (&rgid, &egid, &sgid) != 0)
2424 #endif /* HAVE_GETRESUID */
2426 suid = ruid = getuid ();
2427 sgid = rgid = getgid ();
2432 is_setuid = (ruid != euid || ruid != suid ||
2433 rgid != egid || rgid != sgid);
2435 g_once_init_leave (&check_setuid_initialised, 1);