Lines Matching +full:at +full:- +full:the +full:- +full:time

2 .\" Copyright (c) 2002-2003 Todd C. Miller <millert@openbsd.org>
5 .\" purpose with or without fee is hereby granted, provided that the above
8 .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 .\" Sponsored in part by the Defense Advanced Research Projects
18 .\" Materiel Command, USAF, under agreement number F39502-99-1-0512.
35 daemon schedules commands to be run at specified dates and times.
39 Commands that are only to be run once are scheduled via the
40 .Xr at 1
44 Normally, the
46 daemon is started from the
51 should be run late in the startup sequence,
52 as close to the time when logins are accepted as possible.
58 .Xr at 1
59 files when it starts up and also when changes are made via the
62 .Xr at 1
66 checks the modification time on the system crontab file
70 and the at spool
73 If the modification time has changed, the affected files are reloaded.
75 Any output produced by a command is sent to the user specified in the
77 environment variable as set in the
82 .Xr at 1
85 job), to the job's owner.
86 If a command produces no output or if the
88 environment variable is set to the empty string, no mail will be sent.
90 .Xr at 1
93 jobs submitted with the
96 In this case, mail will be sent even if the job produces no output.
97 .Ss Daylight Saving Time and other time changes
98 Local time changes of less than three hours, such as those caused
99 by the start or end of Daylight Saving Time, are handled specially.
100 This only applies to jobs that run at a specific time and jobs that
104 If time has moved forward, those jobs that would have run in the
106 Conversely, if time has moved backward, care is taken to avoid running
109 Time changes of more than 3 hours are considered to be corrections to
110 the clock or time zone, and the new time is used immediately.
113 .Bl -tag -width Ds
115 If the current load average is greater than
122 jobs to run regardless of the load, a value of 0.0 may be used.
126 will detach from the current tty and become a daemon.
129 option disables this behavior and causes it to run in the foreground.
132 .Bl -tag -width "/var/run/cron.sock" -compact
137 .Xr at 1
151 .Xr at 1 ,
159 files will be ignored if they do not have the proper file mode.
163 If the system crontab file is used,
166 the execute, set-user-ID, set-group-ID or sticky bits set.