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Made the special handling of the daylight time switches optional,

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enabled by the option "-s" (for dSt). This returned the default behavior
to its original form.

The new option name is not "-d" because that would cause associations with
"debug" and cron already has "-x" for debugging, so this would cause
confusion.
This commit is contained in:
Sergey Babkin 2001-01-22 01:54:51 +00:00
parent 7d39b1e3be
commit be821963c1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=71358
2 changed files with 19 additions and 6 deletions
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12
usr.sbin/cron/cron/cron.8
View File

@ -25,6 +25,7 @@
.Nd daemon to execute scheduled commands (Vixie Cron)
.Sh SYNOPSIS
.Nm
.Op Fl s
.Op Fl x Ar debugflag Ns Op ,...
.Sh DESCRIPTION
.Nm Cron
@ -69,10 +70,16 @@ need not be restarted whenever a crontab file is modified. Note that the
command updates the modtime of the spool directory whenever it changes a
crontab.
.Pp
Available options:
.Bl -tag -width Ds
.It Fl s
Enable special handling of the switching between the standard time and
daylight saving time.
.Pp
If the time zone has daylight saving time which differs by one hour from
the standard time and the switch to and from daylight saving time occurs
at :00 minutes (as in most of Asia, Europe and North America) then these
time switches are handled specially by
at :00 minutes (as in most of the world with very few exceptions) then these
time switches would be handled specially by
.Nm cron .
The time zones with other variations of daylight saving time (such as with
30 minutes difference or switched at :30 minutes etc.) do not have such
@ -95,6 +102,7 @@ during the switch to daylight saving time, such jobs are
executed during the next hour at the first minute that is specified
for them in
.Xr crontab 5 .
.El
.Sh SEE ALSO
.Xr crontab 1 ,
.Xr crontab 5

13
usr.sbin/cron/cron/cron.c
View File

@ -45,12 +45,13 @@ static void usage __P((void)),
parse_args __P((int c, char *v[]));
static time_t last_time = 0;
static int dst_enabled = 0;
static void
usage() {
char **dflags;
fprintf(stderr, "usage: cron [-x debugflag[,...]]\n");
fprintf(stderr, "usage: cron [-s] [-x debugflag[,...]]\n");
fprintf(stderr, "\ndebugflags: ");
for(dflags = DebugFlagNames; *dflags; dflags++) {
@ -186,8 +187,9 @@ cron_tick(db)
* we support only change by +-1 hour happening at :00 minutes,
* those living in more strange timezones are out of luck
*/
if (last_time != 0 && tm->tm_isdst != lasttm.tm_isdst
&& TargetTime > last_time /* exclude stepping back */) {
if (dst_enabled && last_time != 0
&& TargetTime > last_time /* exclude stepping back */
&& tm->tm_isdst != lasttm.tm_isdst ) {
int prevhr, nexthr, runtime;
int lastmin, lasthour;
int trandom, tranmonth, trandow;
@ -432,8 +434,11 @@ parse_args(argc, argv)
{
int argch;
while ((argch = getopt(argc, argv, "x:")) != -1) {
while ((argch = getopt(argc, argv, "sx:")) != -1) {
switch (argch) {
case 's':
dst_enabled = 1;
break;
case 'x':
if (!set_debug_flags(optarg))
usage();