From: Thomas Cort Date: Thu, 8 Aug 2013 00:06:47 +0000 (-0400) Subject: readclock: code clean-up, add -q, manpage updates X-Git-Tag: v3.3.0~850 X-Git-Url: http://zhaoyanbai.com/repos/?a=commitdiff_plain;h=7f98bdf040676e29170d96c63df66829c718310d;p=minix.git readclock: code clean-up, add -q, manpage updates - Simplify the message passing between readclock and the driver. - Add a -q command line option to suppress warning messages. This cuts down on the noise when readclock is called early in the boot sequence and a secondary RTC driver (ex TPS95650) isn't up yet. - Update the man page to be less i386 centric and add details about the new -q option. Change-Id: If8d7c50a217ca98c1e9fae0ca92521e2e7c893e4 --- diff --git a/commands/readclock/readclock.c b/commands/readclock/readclock.c index 1b4d4120a..a71c64679 100644 --- a/commands/readclock/readclock.c +++ b/commands/readclock/readclock.c @@ -16,19 +16,18 @@ #include #include -int nflag = 0; /* Tell what, but don't do it. */ -int wflag = 0; /* Set the CMOS clock. */ -int Wflag = 0; /* Also set the CMOS clock register bits. */ -int y2kflag = 0; /* Interpret 1980 as 2000 for clock with Y2K bug. */ - void errmsg(char *s); -void get_time(struct tm *t); -void set_time(struct tm *t); +static void readclock(int type, struct tm *t, int flags); void usage(void); +int quiet = 0; + int main(int argc, char **argv) { + int flags = RTCDEV_NOFLAGS; + int nflag = 0; /* Tell what, but don't do it. */ + int wflag = 0; /* Set the CMOS clock. */ struct tm time1; struct tm time2; struct tm tmnow; @@ -52,10 +51,14 @@ main(int argc, char **argv) wflag = 1; break; case 'W': - Wflag = 1; + flags |= RTCDEV_CMOSREG; + wflag = 1; /* -W implies -w */ break; case '2': - y2kflag = 1; + flags |= RTCDEV_Y2KBUG; + break; + case 'q': + quiet = 1; break; default: usage(); @@ -63,12 +66,10 @@ main(int argc, char **argv) } argc--; } - if (Wflag) - wflag = 1; /* -W implies -w */ /* Read the CMOS real time clock. */ for (i = 0; i < 10; i++) { - get_time(&time1); + readclock(RTCDEV_GET_TIME, &time1, flags); now = time(NULL); time1.tm_isdst = -1; /* Do timezone calculations. */ @@ -78,7 +79,7 @@ main(int argc, char **argv) if (rtc != -1) break; - printf + if (!quiet) printf ("readclock: Invalid time read from CMOS RTC: %d-%02d-%02d %02d:%02d:%02d\n", time2.tm_year + 1900, time2.tm_mon + 1, time2.tm_mday, time2.tm_hour, time2.tm_min, time2.tm_sec); @@ -90,10 +91,12 @@ main(int argc, char **argv) if (!wflag) { /* Set system time. */ if (nflag) { - printf("stime(%lu)\n", (unsigned long) rtc); + if (!quiet) + printf("stime(%lu)\n", (unsigned long) rtc); } else { if (stime(&rtc) < 0) { - errmsg("Not allowed to set time."); + if (!quiet) + errmsg("Not allowed to set time."); exit(1); } } @@ -102,19 +105,20 @@ main(int argc, char **argv) "%a %b %d %H:%M:%S %Z %Y", &tmnow) != 0) { if (date[8] == '0') date[8] = ' '; - printf("%s\n", date); + if (!quiet) printf("%s\n", date); } } else { /* Set the CMOS clock to the system time. */ tmnow = *localtime(&now); if (nflag) { - printf("%04d-%02d-%02d %02d:%02d:%02d\n", - tmnow.tm_year + 1900, - tmnow.tm_mon + 1, - tmnow.tm_mday, - tmnow.tm_hour, tmnow.tm_min, tmnow.tm_sec); + if (!quiet) + printf("%04d-%02d-%02d %02d:%02d:%02d\n", + tmnow.tm_year + 1900, + tmnow.tm_mon + 1, + tmnow.tm_mday, + tmnow.tm_hour, tmnow.tm_min, tmnow.tm_sec); } else { - set_time(&tmnow); + readclock(RTCDEV_SET_TIME, &tmnow, flags); } } exit(0); @@ -125,12 +129,12 @@ errmsg(char *s) { static char *prompt = "readclock: "; - printf("%s%s\n", prompt, s); + if (!quiet) printf("%s%s\n", prompt, s); prompt = ""; } -void -get_time(struct tm *t) +static void +readclock(int type, struct tm *t, int flags) { int r; message m; @@ -138,47 +142,16 @@ get_time(struct tm *t) r = minix_rs_lookup("readclock.drv", &ep); if (r != 0) { - errmsg("Couldn't locate readclock.drv\n"); + if (!quiet) errmsg("Couldn't locate readclock.drv\n"); exit(1); } - m.RTCDEV_TM = t; - m.RTCDEV_FLAGS = (y2kflag) ? RTCDEV_Y2KBUG : RTCDEV_NOFLAGS; - - r = _syscall(ep, RTCDEV_GET_TIME, &m); - if (r != RTCDEV_REPLY || m.RTCDEV_STATUS != 0) { - errmsg("Call to readclock.drv failed\n"); - exit(1); - } -} - -void -set_time(struct tm *t) -{ - int r; - message m; - endpoint_t ep; - - r = minix_rs_lookup("readclock.drv", &ep); - if (r != 0) { - errmsg("Couldn't locate readclock.drv\n"); - exit(1); - } - - m.RTCDEV_TM = t; - m.RTCDEV_FLAGS = RTCDEV_NOFLAGS; - - if (y2kflag) { - m.RTCDEV_FLAGS |= RTCDEV_Y2KBUG; - } - - if (Wflag) { - m.RTCDEV_FLAGS |= RTCDEV_CMOSREG; - } + m.RTCDEV_TM = (char *) t; + m.RTCDEV_FLAGS = flags; - r = _syscall(ep, RTCDEV_SET_TIME, &m); + r = _syscall(ep, type, &m); if (r != RTCDEV_REPLY || m.RTCDEV_STATUS != 0) { - errmsg("Call to readclock.drv failed\n"); + if (!quiet) errmsg("Call to readclock.drv failed\n"); exit(1); } } @@ -186,6 +159,6 @@ set_time(struct tm *t) void usage(void) { - printf("Usage: readclock [-nwW2]\n"); + if (!quiet) printf("Usage: readclock [-nqwW2]\n"); exit(1); } diff --git a/etc/rc b/etc/rc index 319676dc9..e241c2752 100755 --- a/etc/rc +++ b/etc/rc @@ -126,7 +126,7 @@ start) # Start real time clock driver & set system time, otherwise default date. up readclock.drv - readclock || date 201301010000 + readclock -q || date 201301010000 # Initialize files. >/etc/utmp # /etc/utmp keeps track of logins diff --git a/man/man8/readclock.8 b/man/man8/readclock.8 index 9fd7acda1..7094ed63a 100644 --- a/man/man8/readclock.8 +++ b/man/man8/readclock.8 @@ -1,11 +1,11 @@ .TH READCLOCK 8 .SH NAME -readclock \- read the AT's real time clock +readclock \- read or set a real time clock .SH SYNOPSIS -\fBreadclock\fP [\fB\-nwW2\fP] +\fBreadclock\fP [\fB\-nqwW2\fP] .SH DESCRIPTION .B Readclock -reads the AT's real time clock and sets the machine's time. It is usually +reads the real time clock and sets the operating system time. It is usually the second thing done in .BR /etc/rc , the first thing is setting the time zone by sourcing @@ -20,8 +20,11 @@ want to run the clock in GMT then you can put Play-act, don't set the time nor change the calibration data, just show what would be done. .TP +.B \-q +Quiet execution. Suppresses all output. +.TP .B \-w -Write the current time to the CMOS clock. Dangerous, see +Write the current time to the hardware clock. Dangerous, see .BR BUGS . Don't forget to use .B "TZ=GMT"