xmem.c

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/******************************************************************************
 * Shamelessly ripped and modified from the below sources:
 ******************************************************************************/

/* $XConsortium: xload.c,v 1.37 94/04/17 20:43:44 converse Exp $ */
/* $XFree86: xc/programs/xload/xload.c,v 1.7 2002/09/18 17:11:57 tsi Exp $ */
/*

Copyright (c) 1989  X Consortium

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall
not be used in advertising or otherwise to promote the sale, use or
other dealings in this Software without prior written authorization
from the X Consortium.

*/

/*
 * xmem - display system memory usage in a window
 */

#include <stdio.h> 
#include <stdlib.h>
#include <unistd.h>
#include <X11/Intrinsic.h>
#include <X11/Xatom.h>
#include <X11/StringDefs.h>
#include <X11/Shell.h>

#include <X11/Xaw/Cardinals.h>
#include <X11/Xaw/Label.h>
#include <X11/Xaw/Paned.h>
#include <X11/Xmu/SysUtil.h>
#include "UnitStripChart.h"
#include "xmem.h"

#include "xmem.bit"

char *ProgramName;

static void quit(Widget w, XEvent *event, String *params, Cardinal *num_params);

/*
 * Command line options table.  Only resources are entered here...there is a
 * pass over the remaining options after XtParseCommand is let loose. 
 */

static XrmOptionDescRec options[] = {
        {"-scale",      "*mem.minScale",   XrmoptionSepArg, NULL},
        {"-update",     "*mem.update",     XrmoptionSepArg, NULL},
        {"-hl",         "*mem.highlight",  XrmoptionSepArg, NULL},
        {"-highlight",  "*mem.highlight",  XrmoptionSepArg, NULL},
        {"-label",      "*label.label",    XrmoptionSepArg, NULL},
        {"-nolabel",    "*showLabel",      XrmoptionNoArg,  "False"},
        {"-showlabel",  "*showLabel",      XrmoptionNoArg,  "True"},
        {"-jumpscroll", "*mem.jumpScroll", XrmoptionSepArg, NULL},
        {"-watch-total","*memTotal",       XrmoptionSepArg, NULL},
        {"-watch-used", "*memUsed",        XrmoptionSepArg, NULL},
        {"-watch-free", "*memFree",        XrmoptionSepArg, NULL},
        {"-units",      "*mem.units",      XrmoptionSepArg, "B"},
        {"-unit-fn",    "*mem.fontSet",    XrmoptionSepArg, NULL},
};

/*
 * The structure containing the resource information for the
 * Xmem application resources.
 */

#define Offset(field) (XtOffsetOf(XMemResources, field))

static XtResource my_resources[] = {
        {"showLabel", XtCBoolean, XtRBoolean, sizeof(Boolean),
                Offset(show_label), XtRImmediate, (XtPointer) TRUE},
};

#undef Offset

XMemResources xmem_resources;

static XtActionsRec xmem_actions[] = {
        { "quit",       quit },
};
static Atom wm_delete_window;

/*
 * Exit with message describing command line format.
 */

static void usage(void)
{
        char *text[] = {
                "usage:  %s [-options ...]",
                "",
                "where options include:",
          " -display dpy                X server on which to display",
          " -geometry geom              Size and location of window",
          " -fn font                    Font to use in label",
          " -scale number               Minimum number of scale lines",
          " -update seconds             Interval between updates",
          " -label string               Annotation text",
          " -bg color                   Background color",
          " -fg color                   Graph color",
          " -hl color                   Scale and text color",
          " -nolabel                    Removes the label from above the chart.",
          " -showlabel                  Adds the label above the chart.",
          " -jumpscroll value           Number of pixels to scroll on overflow.",
                " -units value                Units measurement (default: B)",
                " -unit-fn font               Font to use in units",
                "",
                0
        };
        int line = 0;

        for (line = 0; text[line] != 0; line++) {
                fprintf(stderr, text[line], ProgramName);
                fprintf(stderr, "\n");
        }

        exit(1);
}

int
main(int argc, char **argv)
{
        XtAppContext app_con;
        Widget toplevel, mem, pane, label_wid, mem_parent;
        Arg args[1];
        Pixmap icon_pixmap = None;
        char *label, host[256], *units;
        int count;
        
        ProgramName = argv[0];
        
        /* For security reasons, we reset our uid/gid after doing the necessary
           system initialization and before calling any X routines. */
        InitMemPoint();
        setgid(getgid());               /* reset gid first while still (maybe) root */
        setuid(getuid());
        
        XtSetLanguageProc(NULL, (XtLanguageProc) NULL, NULL);

        toplevel = 
                XtAppInitialize(
                        &app_con, "XMem", options, XtNumber(options),
                        &argc, argv, NULL, NULL, (Cardinal) 0
                        );
        if (argc != 1)
                usage();
        
        XtGetApplicationResources(
                toplevel,
                (XtPointer)&xmem_resources, 
                my_resources, XtNumber(my_resources),
                NULL, (Cardinal)0
                );
        
        /*
         * This is a hack so that f.delete will do something useful in this
         * single-window application.
         */
        XtAppAddActions (app_con, xmem_actions, XtNumber(xmem_actions));
        XtOverrideTranslations(toplevel,
                XtParseTranslationTable ("<Message>WM_PROTOCOLS: quit()")
                );
    
        XtSetArg (args[0], XtNiconPixmap, &icon_pixmap);
        XtGetValues(toplevel, args, ONE);
        if (icon_pixmap == None) {
                XtSetArg(args[0], XtNiconPixmap, 
                XCreateBitmapFromData(XtDisplay(toplevel),
                        XtScreen(toplevel)->root,
                        (char *)xmem_bits,
                        xmem_width, xmem_height)
                        );
                XtSetValues (toplevel, args, ONE);
    
                if (xmem_resources.show_label) {
                        pane =
                                XtCreateManagedWidget("paned", panedWidgetClass, toplevel, NULL, ZERO);
    
                        label_wid =
                                XtCreateManagedWidget("label", labelWidgetClass, pane, NULL, ZERO);
          
                        XtSetArg (args[0], XtNlabel, &label);
                        XtGetValues(label_wid, args, ONE);
          
                        if (strcmp("label", label) == 0) {
                                (void)XmuGetHostname (host, 255);
                                XtSetArg(args[0], XtNlabel, host);
                                XtSetValues(label_wid, args, ONE);
                        }
    
                        mem_parent = pane;
                }
                else
                        mem_parent = toplevel;
    
                mem =
                        XtCreateManagedWidget("mem", unitStripChartWidgetClass,
                                mem_parent, NULL, ZERO);    

                XtSetArg(args[0], XtNunits, &units);
                XtGetValues(mem, args, ONE);
                if (strcmp("", units) == 0) {
                        XtSetArg(args[0], XtNunits, "B");
                        XtSetValues(mem, args, ONE);
                }
    
                XtAddCallback(mem, XtNgetValue, GetMemPoint, NULL);
        
                XtRealizeWidget(toplevel);
                wm_delete_window =
                        XInternAtom(XtDisplay(toplevel), "WM_DELETE_WINDOW", False);
                (void)XSetWMProtocols (XtDisplay(toplevel), XtWindow(toplevel),
                        &wm_delete_window, 1);
        }
        XtAppMainLoop(app_con);

        return 0;
}

static void quit (w, event, params, num_params)
Widget w;
XEvent *event;
String *params;
Cardinal *num_params;
{
        if (event->type == ClientMessage &&
                event->xclient.data.l[0] != wm_delete_window)
        {
                XBell (XtDisplay(w), 0);
                return;
        }
        XtDestroyApplicationContext(XtWidgetToApplicationContext(w));
        exit (0);
}

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