Process the new location of the ICEauthority file

+ our internal implementation of IceAuthFileName tests
  whether the ICEauthority file exists in the folder
  specified by the XDG_RUNTIME_DIR variable
+ DCOP client tests whether the ICEauthority file for
  a specific user exists in the user's folder based on
  the XDG_RUNTIME_DIR variable
+ tdeinit uses the IceAuthFileName() function
  instead of building the file name

This relates to bug 3027.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 38b2b0be7840d868c21093a406ab98a646212de1)

2 files changed, 79 insertions, 25 deletions

diff --git a/dcop/KDE-ICE/authutil.c b/dcop/KDE-ICE/authutil.c
index 41a2eefaa..da52b1cf3 100644
--- a/dcop/KDE-ICE/authutil.c
+++ b/dcop/KDE-ICE/authutil.c
@@ -81,11 +81,13 @@ char *
 IceAuthFileName ()
 
 {
+    static char baseICEauthority[] = "ICEauthority";
 #ifdef _WIN32
-    static char slashDotICEauthority[] = "\\.ICEauthority";
+    static char pathSep[] = "\\";
 #else
-    static char slashDotICEauthority[] = "/.ICEauthority";
+    static char pathSep[] = "/";
 #endif
+    char	fileSep[2];
     char    	*name;
     static char	*buf;
     static int	bsize;
@@ -95,37 +97,70 @@ IceAuthFileName ()
 #endif
 
     name = getenv ("ICEAUTHORITY");
-    if ( name )
+    if (name && name[0])
 	return (name);
 
-    name = getenv ("HOME");
+    name = getenv("XDG_RUNTIME_DIR");
+    if (name && name[0])
+    {
+	char	*testBuf;
+	strcpy(fileSep, "");
+	size = strlen(name) + strlen(pathSep) + strlen(fileSep) + strlen(baseICEauthority) + 1;
+	testBuf = malloc(size);
+	if (!testBuf)
+	{
+	    return (NULL);
+	}
+	snprintf(testBuf, size, "%s%s%s%s", name, pathSep, fileSep, baseICEauthority);
+	if (access(testBuf, F_OK))
+	{
+	    name = NULL;
+	}
+	free(testBuf);
+    }
 
-    if (!name)
+    if (!name || !name[0])
     {
+	name = getenv ("HOME");
+	strcpy(fileSep, ".");
 #ifdef _WIN32
-		if(name = getenv ("HOMEDRIVE"))
+	if (!name || !name[0])
 	{
-			strcpy (dir, name);
-			if(name = getenv ("HOMEPATH"))
-	    strcat (dir, name);
-	}
-		else
+	    if(name = getenv ("HOMEDRIVE"))
+	    {
+		strcpy (dir, name);
+		if(name = getenv ("HOMEPATH"))
 		{
-			if(name = getenv ("USERPROFILE"))
-				strcpy (dir, name);
-    }
-	    name = dir;
-	if (!name)
+		    strcat (dir, name);
+		}
+		name = dir;
+	    }
+	    else
+	    {
+		name = getenv ("USERPROFILE");
+	    }
+	}
 #endif
 #ifdef __EMX__
-	strcpy (dir,"c:");
-	name = dir;
-	if (!name)
+	if (!name || !name[0])
+	{
+	    strcpy (dir,"c:");
+	    name = dir;
+	}
 #endif
+    }
+    if (!name || !name[0])
+    {
 	return (NULL);
     }
 
-    size = strlen (name) + strlen (&slashDotICEauthority[1]) + 2;
+    /* Special case for "/".  We will add our own '/' later. */
+    if (strcmp(name, pathSep) == 0)
+    {
+	name++;
+    }
+
+    size = strlen(name) + strlen(pathSep) + strlen(fileSep) + strlen(baseICEauthority) + 1;
 
     if (size > bsize)
     {
@@ -137,8 +172,7 @@ IceAuthFileName ()
 	bsize = size;
     }
 
-    strcpy (buf, name);
-    strcat (buf, slashDotICEauthority + (name[1] == '\0' ? 1 : 0));
+    snprintf(buf, bsize, "%s%s%s%s", name, pathSep, fileSep, baseICEauthority);
 
     return (buf);
 }
diff --git a/dcop/client/dcop.cpp b/dcop/client/dcop.cpp
index 8aa1ea59d..698479612 100644
--- a/dcop/client/dcop.cpp
+++ b/dcop/client/dcop.cpp
@@ -594,9 +594,29 @@ int runDCOP( QCStringList args, UserList users, Session session,
 	    ( getenv( "ICEAUTHORITY" ) == 0 || getenv( "DISPLAY" ) == 0 ) ) )
 	{
 	    // Check for ICE authority file and if the file can be read by us
-	    TQString home = it.data();
-	    TQString iceFile = it.data() + "/.ICEauthority";
-	    TQFileInfo fi( iceFile );
+	    TQString iceFileBase = "ICEauthority";
+	    TQString iceFile;
+	    TQFileInfo fi;
+
+	    if (getenv("XDG_RUNTIME_DIR") != 0 )
+	    {
+		TQFileInfo xdgRuntime(getenv("XDG_RUNTIME_DIR"));
+		passwd* pstruct = getpwnam(it.key().local8Bit());
+		if (pstruct)
+		{
+		    iceFile = TQString("%1/%2/%3").arg(xdgRuntime.dirPath()).arg(pstruct->pw_uid).arg(iceFileBase);
+		    fi.setFile(iceFile);
+		}
+		if (!pstruct || !fi.exists())
+		{
+		    iceFile = TQString::null;
+		}
+	    }
+	    if (iceFile.isEmpty())
+	    {
+		iceFile = TQString("%1/.%2").arg(it.data()).arg(iceFileBase);
+		fi.setFile(iceFile);
+	    }
 	    if( iceFile.isEmpty() )
 	    {
 		cerr_ << "WARNING: Cannot determine home directory for user "