On Wednesday 27 of January 2010 11:59:00 you wrote:
> Hi Marek,
>
> (sorry for delay, but I'm ill in last days...)
>
> On Thu, Jan 07, 2010 at 08:26:58PM +0100, Marek Otahal wrote:
> > Changelog:
> >
> > Support for 'show' and 'disable' actions/modes (rtcwake -m <mode>)
> > * show : print current alarm settings (from /proc/driver/rtc)
>
> this is nice idea, but the implementation is poor. It'd be nice to
> have more user friendly output (convert to the local time, print
> important information only, ...), for example:
>
> # rtcwake --show
> PENDING, alarm time: 11:22:33
>
> maybe we can also use RTC_WKALM_RD ioctl instead /proc.
>
> > * disable: disable alarm on [optionally specified -d] rtc device
>
> Good idea.
>
> > --- sys-utils/rtcwake.c 2010-01-07 19:08:21.673672059 +0100
> > +++
> > ../../util-linux-ng/util-linux-ng-2.17-rc3/sys-utils/rtcwake.c
2010-01-0
> > 4 20:16:51.444954038 +0100 @@ -54,7 +54,7 @@
> >
> > #define ADJTIME_PATH "/etc/adjtime"
> > #define DEFAULT_DEVICE "/dev/rtc0"
> > #define DEFAULT_MODE "standby"
> >
> > -
> > +#define RTC_INFO "/proc/driver/rtc"
> >
> > enum ClockMode {
> >
> > CM_AUTO,
> > CM_UTC,
> >
> > @@ -291,6 +291,35 @@
> >
> > return 0;
> >
> > }
> >
> > +static int disable_alarm(int fd) {
> > + if (ioctl(fd, RTC_AIE_OFF, 0) < 0) {
> > + perror(_("disable rtc alarm interrupt"));
> > + return -1;
> > + }
> > + return 0;
> > +}
> > +
> > +static int print_alarm(void) {
> > + int f = 0;
> > + f = open(RTC_INFO, O_RDONLY);
> > + if(f<0) {
> > + fprintf(stderr, "Cannot open %s for reading .\n", RTC_INFO);
> > + return 1;
> > + }
> > +
> > + char buf;
> > + int i = 0;
> > +
> > + do {
> > + i = read(f, &buf, sizeof buf);
> > + fprintf(stdout, "%c", buf);
> > + buf = ' ';
> > + }while( i > 0);
> > +
> > + close(f);
> > + return 0;
> > +}
> > +
> >
> > int main(int argc, char **argv)
> > {
> >
> > char *devname = DEFAULT_DEVICE;
> >
> > @@ -338,6 +367,8 @@
> >
> > || strcmp(optarg, "on") == 0
> > || strcmp(optarg, "no") == 0
> > || strcmp(optarg, "off") == 0
> >
> > + || strcmp(optarg, "show") == 0
> > + || strcmp(optarg, "disable") == 0
> >
> > ) {
> >
> > suspend = strdup(optarg);
> > break;
> >
> > @@ -403,7 +434,7 @@
> >
> > printf(clock_mode == CM_UTC ? _("Using UTC time.\n") :
> > _("Using local time.\n"));
> >
> > - if (!alarm && !seconds) {
> > + if ( (!alarm && !seconds) && strcmp(suspend, "show") != 0 &&
> > strcmp(suspend, "disable") != 0 ) {
> >
> > fprintf(stderr, _("%s: must provide wake time\n"), progname);
> > usage(EXIT_FAILURE);
> >
> > }
> >
> > @@ -468,9 +499,11 @@
> >
> > fflush(stdout);
> > usleep(10 * 1000);
> >
> > - if (strcmp(suspend, "no") == 0)
> > + if (strcmp(suspend, "no") == 0) {
> >
> > exit(EXIT_SUCCESS);
> >
> > - else if (strcmp(suspend, "on") != 0) {
> > + }
> > + // determine supported suspend action (nowadays only "mem" or "disk")
&
> > do the suspend + else if ( (strcmp(suspend, "mem") == 0) ||
> > (strcmp(suspend, "disk") == 0) ) {
> >
> > sync();
> > suspend_system(suspend);
> >
> > } else if (strcmp(suspend, "off") == 0) {
> >
> > @@ -487,7 +520,19 @@
> >
> > fprintf(stderr, _("%s: unable to execute %s: %s\n"),
> >
> > progname, _PATH_SHUTDOWN, strerror(errno));
> >
> > rc = EXIT_FAILURE;
> >
> > - } else {
> > + } else if(strcmp(suspend, "show") == 0) {
> > + // print alarm info
> > + fprintf(stdout, "Current alarm settings by rtc: \n");
> > + print_alarm();
>
> We shouldn't ignore return value from print_alarm(), the same problem
> I see with suspend_system() call in the rtcwake code.
>
> > + close(fd);
> > + return rc;
> > +
> > + } else if(strcmp(suspend, "disable") == 0) {
> > + // disable the alarm
> > + fprintf(stdout, "Disabling alarm on device %s \n", devname);
> > + // alarm is always disabled at the end, so just print info and
skip
> > +
> > + } else { // mode "on", "standby"
> >
> > unsigned long data;
> >
> > do {
> >
> > @@ -501,9 +546,7 @@
> >
> > } while (!(data & RTC_AF));
> >
> > }
> >
> > - if (ioctl(fd, RTC_AIE_OFF, 0) < 0)
> > - perror(_("disable rtc alarm interrupt"));
> > -
> > + disable_alarm(fd);
> >
> > close(fd);
> >
> > return rc;
>
> Please, use CC: to util-linux-ng mailing list. Thanks.
>
> Karel
Change log:
* update man pages (disable mode to rtcwake)
Signed-off-by: Marek Otahal <markotahal@xxxxxxxxx>
Patch:
--- ../../util-linux-ng/sys-utils/rtcwake.8 2010-04-14 18:31:25.094015939
+0200
+++ rtcwake.8 2010-04-14 18:58:00.631357626 +0200
@@ -114,6 +114,9 @@
.B on
Don't suspend, but read RTC device until alarm time appears. This mode is
useful for debugging.
+.TP
+.B disable
+Disable previously set alarm [on specified device -d].
.RE
.PP
.SH NOTES
--
Marek Otahal :o)
--- ../../util-linux-ng/sys-utils/rtcwake.8 2010-04-14 18:31:25.094015939 +0200
+++ rtcwake.8 2010-04-14 18:58:00.631357626 +0200
@@ -114,6 +114,9 @@
.B on
Don't suspend, but read RTC device until alarm time appears. This mode is
useful for debugging.
+.TP
+.B disable
+Disable previously set alarm [on specified device -d].
.RE
.PP
.SH NOTES
