Initial import of the CDE 2.1.30 sources from the Open Group.

cde/lib/DtSvc/DtUtil1/SmUtil.c

@@ -0,0 +1,300 @@
+/* $XConsortium: SmUtil.c /main/5 1996/06/21 17:26:03 ageorge $ */
+/*                                                                            *
+ * (c) Copyright 1993, 1994 Hewlett-Packard Company                           *
+ * (c) Copyright 1993, 1994 International Business Machines Corp.             *
+ * (c) Copyright 1993, 1994 Sun Microsystems, Inc.                            *
+ * (c) Copyright 1993, 1994 Novell, Inc.                                      *
+ */
+/******************************************************************************
+ *
+ * File Name: SmUtil.c
+ *
+ *  Contains the DT functions used by an application to communicate with
+ *  dtsession.
+ *
+ *****************************************************************************/
+
+#if 0
+#include <sys/param.h>
+#include <sys/types.h>
+#endif
+
+#include <sys/stat.h>
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+#include <Dt/WsmP.h>
+#include <Dt/DtP.h>
+#include <Dt/Session.h>
+#include <Dt/SmCreateDirs.h>
+#include "DtSvcLock.h"
+
+#ifndef CDE_INSTALLATION_TOP
+#define CDE_INSTALLATION_TOP "/opt/dt"
+#endif
+
+/********    Static Function Declarations    ********/
+
+static char *getSessionName(Display *, Atom);
+static Boolean getSessionPath( Widget, char *, char **, char **);
+
+/********    End Static Function Declarations    ********/
+
+/*************************************<->*************************************
+ *
+ *  getSessionName (display, prop )
+ *
+ *
+ *  Description:
+ *  -----------
+ *  Returns the session name. 
+ *
+ *  Inputs:
+ *  ------
+ *  display - the display
+ *  prop - the property name of the save or restore session
+ *
+ *  Outputs:
+ *  -------
+ *  
+ *  Return:
+ *  ------
+ *  Returns the session name string or NULL if it could not be obtained. 
+ *  This value should be freed with XFree().
+ *  
+ *
+ *************************************<->***********************************/
+
+static char *
+getSessionName(
+        Display *display,
+        Atom prop)
+{
+  int                 propStatus;
+  Atom                actualType;
+  int                 actualFormat;
+  unsigned long       nitems;
+  unsigned long       leftover;
+  char               *property = NULL;
+
+  propStatus = XGetWindowProperty (display, RootWindow(display, 0), 
+                                   prop, 0L,
+                                   1000000L, False,
+                                   AnyPropertyType, &actualType,
+                                   &actualFormat, &nitems, &leftover, 
+                                   (unsigned char **)&property);
+
+ 
+  if(propStatus == Success &&
+     actualType != None &&
+     actualFormat == 8 &&
+     nitems != 0)
+  {
+    return(property);
+  }
+ 
+  if (property)
+  {
+    XFree(property);
+  }
+
+  return(NULL);
+}
+
+/*************************************<->*************************************
+ *
+ *  getSessionPath (widget, propstring, savePath, saveFile)
+ *
+ *
+ *  Description:
+ *  -----------
+ *  This function generates a full path name for an application's state
+ *  file. If *saveFile is NULL, a new file name is generated, else
+ *  *saveFile is used. It returns True if the path is returned, False
+ *  otherwise.
+ *
+ *
+ *  Inputs:
+ *  ------
+ *  widget - a widget to use to get the display
+ *  propstring - session name property
+ *  savePath - pointer to memory in which to place pointer to path
+ *  saveFile - pointer to filename. If *saveFile is NULL, a new filename
+ *             will be allocated and returned in *saveFile, else *saveFile
+ *             will be used to generate path name
+ *
+ *  Outputs:
+ *  -------
+ *  True - path name returned
+ *  False - path name not returned
+ *
+ *************************************<->***********************************/
+
+static Boolean
+getSessionPath(
+        Widget widget,
+        char *propstring,
+        char **savePath,
+        char **saveFile )
+{
+    Display 		*display;
+    char 		*tmpPath = NULL;
+    char        	*property = NULL;
+    char                *fileName;
+    struct stat  	buf;
+    int 		status;
+    
+    display = XtDisplay(widget); 
+    
+    tmpPath = _DtCreateDtDirs(display);
+    if (tmpPath == NULL) goto abort;
+    
+    property = getSessionName(display, 
+                  XInternAtom(display, propstring, False));
+    if (property == NULL) goto abort;
+
+   /*
+    * NOTE: it is assumed that _DtCreateDtDirs() returns a buffer of 
+    *       size MAXPATHLEN+1. This allows us to avoid a extra alloc
+    *       and copy -- at the expense of code maintainability.
+    */
+    if ((strlen(tmpPath) + 1 + strlen(property)) > MAXPATHLEN) goto abort;
+
+   /* 
+    * parse the property string and create directory if needed 
+    */
+    (void)strcat(tmpPath, "/");
+    (void)strcat(tmpPath, property);
+    status = stat(tmpPath, &buf);
+
+   /*
+    * directory does not exist.
+    */
+    if(status == -1)
+    {
+        status = mkdir(tmpPath, 0000);
+        if(status == -1) goto abort;
+
+        (void)chmod(tmpPath, 0755);
+    }
+
+    (void)strcat(tmpPath, "/");
+
+    if (*saveFile == NULL)
+    {
+     /*
+      * No saveFile name was provided, so generate a new one.
+      */
+      int len = strlen(tmpPath);
+
+      (void)strcat(tmpPath, "dtXXXXXX");
+      (void)mktemp(tmpPath);
+
+      *saveFile = (char *) XtMalloc(15 * sizeof(char));
+      if(*saveFile == NULL) goto abort;
+
+      (void)strcpy(*saveFile, tmpPath+len);
+    }
+    else
+    {
+     /*
+      * A saveFile name was provided, so use it.
+      */
+      (void)strcat(tmpPath, *saveFile);
+    }
+
+    *savePath = tmpPath;
+
+    XFree ((char *)property);
+    return(True);
+
+  abort:
+   /*
+    * ObGoto: if it clarifies the logic and reduces code, 
+    *         goto's are ok by me.
+    */
+    *savePath = NULL;
+    if (tmpPath) XtFree ((char *)tmpPath);
+    if (property) XFree ((char *)property);
+    return(False);
+}
+
+
+/*************************************<->*************************************
+ *
+ *  DtSessionSavePath (widget, savePath, saveFile)
+ *
+ *
+ *  Description:
+ *  -----------
+ *  This function returns (in it's parameters) the full path name for an
+ *  application to save to, as well as the file name to save away for later
+ *  restoration.  It returns True if the path is returned, False
+ *  otherwise.
+ *
+ *
+ *  Inputs:
+ *  ------
+ *  widget - a widget to use to get the display
+ *
+ *  Outputs:
+ *  -------
+ *  returns a status value
+ *
+ *************************************<->***********************************/
+
+Boolean 
+DtSessionSavePath(
+        Widget widget,
+        char **savePath,
+        char **saveFile )
+{
+    Boolean             result;
+    _DtSvcWidgetToAppContext(widget);
+
+    _DtSvcAppLock(app);
+    *saveFile = NULL;
+    result = getSessionPath(widget, _XA_DT_SAVE_MODE, savePath, saveFile);
+    _DtSvcAppUnlock(app);
+    
+    return(result);
+} /* END OF FUNCTION DtSessionSavePath */
+
+
+/*************************************<->*************************************
+ *
+ *  DtSessionRestorePath (widget, restorePath, restoreFile)
+ *
+ *
+ *  Description:
+ *  -----------
+ *  This function returns (in its parameters), the path where the application
+ *  is to restore its file from.
+ *  It returns True if the path is returned, False
+ *  otherwise.
+ *
+ *
+ *  Inputs:
+ *  ------
+ *  widget - a widget to use to get the display
+ *
+ *  Outputs:
+ *  -------
+ *  returns a status value
+ *
+ *************************************<->***********************************/
+
+Boolean 
+DtSessionRestorePath(
+        Widget widget,
+        char **savePath,
+        char *saveFile )
+{
+    Boolean             result;
+    _DtSvcWidgetToAppContext(widget);
+
+    _DtSvcAppLock(app);
+    result = getSessionPath(widget, _XA_DT_RESTORE_MODE, savePath, &saveFile);
+    _DtSvcAppUnlock(app);
+    
+    return(result);
+} /* END OF FUNCTION DtSessionRestorePath */