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/*
* This is a simple X11 program that displays the battery percentage
* on NetBSD.
*
* It should be compiled with the following flags:
*
* CFLAGS = -I/usr/X11R7/include -I/usr/pkg/include
* LDFLAGS = -lXm -L/usr/X11R7/lib -L/usr/pkg/lib
* LDFLAGS += -Wl,-R/usr/X11R7/lib -Wl,-R/usr/pkg/lib
*
* It requires x11/motif to be installed.
*
* The program uses the following resources:
*
* xbattext*fontList = normal font
* xbattext*foreground = normal text color
* xbattext*alertFontList = font when battery is low
* xbattext*alertForeground = text color when battery is low
* xbattext*chargeFontList = font when charging
* xbattext*chargeForeground = text color when charging
*
* Set their values in ~/.Xdefaults to customize xbattext.
*
* xbattext is written by John Ankarstr\xf6m <john@ankarstrom.se> and
* is released into the public domain; do whatever you want with it.
*/
#include <err.h>
#include <fcntl.h>
#include <machine/apmvar.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <Xm/Label.h>
/* interval in seconds */
#define INTERVAL 10
/* low battery level */
#define ALERT 30
void update(XtPointer, XtIntervalId *);
/* resources */
struct res {
XmFontList font_list;
XmFontList alert_font_list;
XmFontList charge_font_list;
Pixel foreground;
Pixel alert_foreground;
Pixel charge_foreground;
} res;
static XtResource res_opts[] = {
{"fontList", "FontList", XmRFontList, sizeof(XmFontList),
XtOffset(struct res*, font_list), XtRImmediate, (caddr_t)NULL},
{"alertFontList", "AlertFontList", XmRFontList, sizeof(XmFontList),
XtOffset(struct res*, alert_font_list), XtRImmediate, (caddr_t)NULL},
{"chargeFontList", "ChargeFontList", XmRFontList, sizeof(XmFontList),
XtOffset(struct res*, charge_font_list), XtRImmediate, (caddr_t)NULL},
{"foreground", "foreground", XmRPixel, sizeof(Pixel),
XtOffset(struct res*, foreground), XtRImmediate, (caddr_t)NULL},
{"alertForeground", "AlertForeground", XmRPixel, sizeof(Pixel),
XtOffset(struct res*, alert_foreground), XtRImmediate, (caddr_t)NULL},
{"chargeForeground", "ChargeForeground", XmRPixel, sizeof(Pixel),
XtOffset(struct res*, charge_foreground), XtRImmediate, (caddr_t)NULL},
};
/* application state */
Arg wargs[10];
char *s;
int apmfd, alert, charge;
struct apm_power_info info;
Widget toplevel, label;
XmString xms;
XtAppContext app_context;
int
main(int argc, char* argv[])
{
toplevel = XtVaAppInitialize(
&app_context,
"XBat",
NULL, 0,
&argc, argv,
NULL,
NULL);
if ((apmfd = open("/dev/apm", O_RDONLY)) == -1)
err(1, "open");
if ((s = malloc(5*sizeof(char))) == NULL)
err(1, "malloc");
/* load application resources */
XtGetApplicationResources(toplevel,
&res, res_opts, XtNumber(res_opts), NULL, 0);
/* create motif label */
label = XtVaCreateManagedWidget("label",
xmLabelWidgetClass, toplevel,
XmNlabel, "",
NULL);
alert = 0;
charge = 0;
update(NULL, NULL);
XtRealizeWidget(toplevel);
XtAppMainLoop(app_context);
}
/* update battery status and (re-)add timer */
void
update(XtPointer client_data, XtIntervalId *t)
{
int i;
/* get battery info */
memset(&info, 0, sizeof(info));
if (ioctl(apmfd, APM_IOC_GETPOWER, &info) == -1) {
fprintf(stderr, "ioctl APM_IOC_GETPOWER failed\n");
sprintf(s, "?");
goto end;
}
/* put battery status into label */
sprintf(s, "%d%%", info.battery_life);
xms = XmStringCreate(s, XmFONTLIST_DEFAULT_TAG);
/* set color and font depending on battery status */
i = 0;
XtSetArg(wargs[i], XmNlabelString, xms); i++;
/* check if the ac adapter has been plugged in */
if (!charge && info.ac_state == APM_AC_ON) {
charge = 1;
XtSetArg(wargs[i], XtNforeground, res.charge_foreground);
i++;
if (res.charge_font_list != NULL) {
XtSetArg(wargs[i], XmNfontList, res.charge_font_list);
i++;
} else if (res.font_list != NULL) {
XtSetArg(wargs[i], XmNfontList, res.font_list);
i++;
}
goto set; /* skip further checks */
}
/* check low battery */
#ifdef ALERT
if (!alert && info.battery_life < ALERT) {
alert = 1;
XtSetArg(wargs[i], XtNforeground, res.alert_foreground);
i++;
if (res.alert_font_list != NULL) {
XtSetArg(wargs[i], XmNfontList, res.alert_font_list);
i++;
}
} else if (alert && info.battery_life >= ALERT) {
alert = 0;
XtSetArg(wargs[i], XtNforeground, res.foreground);
i++;
if (res.font_list != NULL) {
XtSetArg(wargs[i], XmNfontList, res.font_list);
i++;
}
}
#endif
/* check if the ac adapter has been plugged out */
if (charge && info.ac_state != APM_AC_ON) {
charge = 0;
if (i > 1) goto set; /* don't overwrite alert */
XtSetArg(wargs[i], XtNforeground, res.foreground);
i++;
if (res.font_list != NULL) {
XtSetArg(wargs[i], XmNfontList, res.font_list);
i++;
}
}
set: XtSetValues(label, wargs, i);
XmStringFree(xms);
/* add new timer */
end: XtAppAddTimeOut(app_context, INTERVAL * 1000, update, NULL);
}
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