src/unix/stdpaths.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/unix/stdpaths.cpp
   3 // Purpose:     wxStandardPaths implementation for Unix & OpenVMS systems
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     2004-10-19
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2004 Vadim Zeitlin <vadim@wxwindows.org>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // for compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_STDPATHS
  28
  29 #include "wx/stdpaths.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/app.h"
  33     #include "wx/wxcrt.h"
  34     #include "wx/utils.h"
  35 #endif //WX_PRECOMP
  36
  37 #include "wx/filename.h"
  38 #include "wx/log.h"
  39 #include "wx/textfile.h"
  40
  41 #if defined( __LINUX__ ) || defined( __VMS )
  42     #include <unistd.h>
  43 #endif
  44
  45 // ============================================================================
  46 // common VMS/Unix part of wxStandardPaths implementation
  47 // ============================================================================
  48
  49 void wxStandardPaths::SetInstallPrefix(const wxString& prefix)
  50 {
  51     m_prefix = prefix;
  52 }
  53
  54 wxString wxStandardPaths::GetUserConfigDir() const
  55 {
  56     return wxFileName::GetHomeDir();
  57 }
  58
  59
  60 // ============================================================================
  61 // wxStandardPaths implementation for VMS
  62 // ============================================================================
  63
  64 #ifdef __VMS
  65
  66 wxString wxStandardPaths::GetInstallPrefix() const
  67 {
  68     if ( m_prefix.empty() )
  69     {
  70         const_cast<wxStandardPaths *>(this)->m_prefix = wxT("/sys$system");
  71     }
  72
  73     return m_prefix;
  74 }
  75
  76 wxString wxStandardPaths::GetConfigDir() const
  77 {
  78    return wxT("/sys$manager");
  79 }
  80
  81 wxString wxStandardPaths::GetDataDir() const
  82 {
  83    return AppendAppInfo(GetInstallPrefix() + wxT("/sys$share"));
  84 }
  85
  86 wxString wxStandardPaths::GetLocalDataDir() const
  87 {
  88    return AppendAppInfo(wxT("/sys$manager"));
  89 }
  90
  91 wxString wxStandardPaths::GetUserDataDir() const
  92 {
  93    return wxFileName::GetHomeDir();
  94 }
  95
  96 wxString wxStandardPaths::GetPluginsDir() const
  97 {
  98     return wxString(); // TODO: this is wrong, it should return something
  99 }
 100
 101 wxString
 102 wxStandardPaths::GetLocalizedResourcesDir(const wxString& lang,
 103                                           ResourceCat category) const
 104 {
 105     return wxStandardPathsBase::GetLocalizedResourcesDir(lang, category);
 106 }
 107
 108 wxString wxStandardPaths::GetExecutablePath() const
 109 {
 110     return wxStandardPathsBase::GetExecutablePath();
 111 }
 112
 113 #else // !__VMS
 114
 115 // ============================================================================
 116 // wxStandardPaths implementation for Unix
 117 // ============================================================================
 118
 119 wxString wxStandardPaths::GetExecutablePath() const
 120 {
 121 #ifdef __LINUX__
 122     wxString exeStr;
 123
 124     char buf[4096];
 125     int result = readlink("/proc/self/exe", buf, WXSIZEOF(buf) - sizeof(char));
 126     if ( result != -1 )
 127     {
 128         buf[result] = '\0'; // readlink() doesn't NUL-terminate the buffer
 129
 130         // if the /proc/self/exe symlink has been dropped by the kernel for
 131         // some reason, then readlink() could also return success but
 132         // "(deleted)" as link destination...
 133         if ( strcmp(buf, "(deleted)") != 0 )
 134             exeStr = wxString(buf, wxConvLibc);
 135     }
 136
 137     if ( exeStr.empty() )
 138     {
 139         // UPX-specific hack: when using UPX on linux, the kernel will drop the
 140         // /proc/self/exe link; in this case we try to look for a special
 141         // environment variable called "   " which is created by UPX to save
 142         // /proc/self/exe contents. See
 143         //      http://sf.net/tracker/?func=detail&atid=309863&aid=1565357&group_id=9863
 144         // for more information about this issue.
 145         wxGetEnv(wxT("   "), &exeStr);
 146     }
 147
 148     if ( !exeStr.empty() )
 149         return exeStr;
 150 #endif // __LINUX__
 151
 152     return wxStandardPathsBase::GetExecutablePath();
 153 }
 154
 155 void wxStandardPaths::DetectPrefix()
 156 {
 157     // we can try to infer the prefix from the location of the executable
 158     wxString exeStr = GetExecutablePath();
 159     if ( !exeStr.empty() )
 160     {
 161         // consider that we're in the last "bin" subdirectory of our prefix
 162         size_t pos = exeStr.rfind(wxT("/bin/"));
 163         if ( pos != wxString::npos )
 164             m_prefix.assign(exeStr, 0, pos);
 165     }
 166
 167     if ( m_prefix.empty() )
 168     {
 169         m_prefix = wxT("/usr/local");
 170     }
 171 }
 172
 173 wxString wxStandardPaths::GetInstallPrefix() const
 174 {
 175     if ( m_prefix.empty() )
 176     {
 177         wxStandardPaths *pathPtr = const_cast<wxStandardPaths *>(this);
 178         pathPtr->DetectPrefix();
 179     }
 180
 181     return m_prefix;
 182 }
 183
 184 // ----------------------------------------------------------------------------
 185 // public functions
 186 // ----------------------------------------------------------------------------
 187
 188 wxString wxStandardPaths::GetConfigDir() const
 189 {
 190    return wxT("/etc");
 191 }
 192
 193 wxString wxStandardPaths::GetDataDir() const
 194 {
 195     // allow to override the location of the data directory by setting
 196     // WX_APPNAME_DATA_DIR environment variable: this is very useful in
 197     // practice for running well-written (and so using wxStandardPaths to find
 198     // their files) wx applications without installing them
 199     static const wxString
 200       envOverride(
 201         getenv(
 202             ("WX_" + wxTheApp->GetAppName().Upper() + "_DATA_DIR").c_str()
 203         )
 204       );
 205
 206     if ( !envOverride.empty() )
 207         return envOverride;
 208
 209    return AppendAppInfo(GetInstallPrefix() + wxT("/share"));
 210 }
 211
 212 wxString wxStandardPaths::GetLocalDataDir() const
 213 {
 214    return AppendAppInfo(wxT("/etc"));
 215 }
 216
 217 wxString wxStandardPaths::GetUserDataDir() const
 218 {
 219    return AppendAppInfo(wxFileName::GetHomeDir() + wxT("/."));
 220 }
 221
 222 wxString wxStandardPaths::GetPluginsDir() const
 223 {
 224     return AppendAppInfo(GetInstallPrefix() + wxT("/lib"));
 225 }
 226
 227 wxString
 228 wxStandardPaths::GetLocalizedResourcesDir(const wxString& lang,
 229                                           ResourceCat category) const
 230 {
 231     if ( category != ResourceCat_Messages )
 232         return wxStandardPathsBase::GetLocalizedResourcesDir(lang, category);
 233
 234     return GetInstallPrefix() + wxT("/share/locale/") + lang + wxT("/LC_MESSAGES");
 235 }
 236
 237 wxString wxStandardPaths::GetDocumentsDir() const
 238 {
 239     {
 240         wxLogNull logNull;
 241         wxString homeDir = wxFileName::GetHomeDir();
 242         wxString configPath;
 243         if (wxGetenv(wxT("XDG_CONFIG_HOME")))
 244             configPath = wxGetenv(wxT("XDG_CONFIG_HOME"));
 245         else
 246             configPath = homeDir + wxT("/.config");
 247         wxString dirsFile = configPath + wxT("/user-dirs.dirs");
 248         if (wxFileExists(dirsFile))
 249         {
 250             wxTextFile textFile;
 251             if (textFile.Open(dirsFile))
 252             {
 253                 size_t i;
 254                 for (i = 0; i < textFile.GetLineCount(); i++)
 255                 {
 256                     wxString line(textFile[i]);
 257                     int pos = line.Find(wxT("XDG_DOCUMENTS_DIR"));
 258                     if (pos != wxNOT_FOUND)
 259                     {
 260                         wxString value = line.AfterFirst(wxT('='));
 261                         value.Replace(wxT("$HOME"), homeDir);
 262                         value.Trim(true);
 263                         value.Trim(false);
 264                         if (!value.IsEmpty() && wxDirExists(value))
 265                             return value;
 266                         else
 267                             break;
 268                     }
 269                 }
 270             }
 271         }
 272     }
 273
 274     return wxStandardPathsBase::GetDocumentsDir();
 275 }
 276
 277 #endif // __VMS/!__VMS
 278
 279 #endif // wxUSE_STDPATHS