Annotation of src/usr.bin/at/at.1, Revision 1.1
1.1 ! deraadt 1: .\" $NetBSD: at.1,v 1.6 1995/03/25 18:13:29 glass Exp $
! 2: .\"
! 3: .\"
! 4: .\" Copyright (c) 1993 Christopher G. Demetriou
! 5: .\" All rights reserved.
! 6: .\"
! 7: .\" Redistribution and use in source and binary forms, with or without
! 8: .\" modification, are permitted provided that the following conditions
! 9: .\" are met:
! 10: .\" 1. Redistributions of source code must retain the above copyright
! 11: .\" notice, this list of conditions and the following disclaimer.
! 12: .\" 2. Redistributions in binary form must reproduce the above copyright
! 13: .\" notice, this list of conditions and the following disclaimer in the
! 14: .\" documentation and/or other materials provided with the distribution.
! 15: .\" 3. All advertising materials mentioning features or use of this software
! 16: .\" must display the following acknowledgement:
! 17: .\" This product includes software developed by Christopher G. Demetriou.
! 18: .\" 3. The name of the author may not be used to endorse or promote products
! 19: .\" derived from this software without specific prior written permission
! 20: .\"
! 21: .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 22: .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 23: .\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 24: .\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 25: .\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 26: .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 27: .\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 28: .\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 29: .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 30: .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 31: .\"
! 32: .\"
! 33: .Dd December 5, 1993
! 34: .Dt "AT" 1
! 35: .Os NetBSD 0.9a
! 36: .Sh NAME
! 37: .Nm at, batch, atq, atrm
! 38: .Nd queue, examine, or delete jobs for later execution
! 39: .\"
! 40: .Sh SYNOPSIS
! 41: .Nm at
! 42: .Op Fl q Ar queue
! 43: .Op Fl f Ar file
! 44: .Op Fl m
! 45: .Ar time
! 46: .Pp
! 47: .Nm atq
! 48: .Op Fl q Ar queue
! 49: .Op Fl v
! 50: .Pp
! 51: .Nm atrm
! 52: .Ar job
! 53: .Op Ar job ...
! 54: .Pp
! 55: .Nm batch
! 56: .Op Fl f Ar file
! 57: .Op Fl m
! 58: .Sh DESCRIPTION
! 59: The
! 60: .Nm at
! 61: and
! 62: .Nm batch
! 63: utilities read commands from the standard input or a specified file
! 64: which are to be executed at a later time, using
! 65: .Xr sh 1 .
! 66: .Pp
! 67: The functions of the commands are as follows:
! 68: .Bl -tag -width indent
! 69: .It Nm at
! 70: Executes commands at a specified time.
! 71: .It Nm atq
! 72: Lists the user's pending jobs, unless the user is
! 73: the superuser. In that case, everybody's jobs are
! 74: listed.
! 75: .It Nm atrm
! 76: Deletes jobs.
! 77: .It Nm batch
! 78: executes commands when system load levels permit.
! 79: In other words, it executes the commands when the load
! 80: average drops below a specified level.
! 81: .El
! 82: .Pp
! 83: For both
! 84: .Nm at
! 85: and
! 86: .Nm batch ,
! 87: the working directory, environment (except for the variables
! 88: .Nm TERM ,
! 89: .Nm TERMCAP ,
! 90: .Nm DISPLAY ,
! 91: and
! 92: .Nm _ )
! 93: and the umask are retained from the time of invocation. The user
! 94: will be mailed the standard output and standard error from
! 95: his commands if any output is generated. If
! 96: .Nm at
! 97: is executed from a
! 98: .Xr su 1
! 99: shell, the owner of the login shell will receive the mail.
! 100: .Sh OPTIONS
! 101: .Bl -tag -width indent
! 102: The available options are as follows:
! 103: .It Fl q Ar queue
! 104: Use the specified queue. A queue designation consists
! 105: of a single letter; valid queue designation range from
! 106: .Ar a
! 107: to
! 108: .Ar l .
! 109: The
! 110: .Ar a
! 111: queue is the default, and
! 112: .Ar b
! 113: is the batch queue. Queues with higher letters run with
! 114: increased niceness. If
! 115: .Nm atq
! 116: is given a specific queue, it will only show jobs pending
! 117: in that queue.
! 118: .It Fl m
! 119: Send mail to the user when the job has completed, even if
! 120: there was no output.
! 121: .It Fl f Ar file
! 122: Reads the job from
! 123: .Ar file
! 124: rather than the standard input.
! 125: .It Fl v
! 126: Shows completed but not yet deleted jobs in the queue.
! 127: .Sh TIME SPECIFICATION
! 128: .Nm At
! 129: allows some moderately complex time specifications.
! 130: It accepts times of the form
! 131: .Ar HHMM
! 132: or
! 133: .Ar HH:MM
! 134: to run a job at a specific time of day. If
! 135: that time is already passed, the next day is assumed.
! 136: You may also specify
! 137: .Nm midnight ,
! 138: .Nm noon ,
! 139: or
! 140: .Nm teatime
! 141: (4PM) and you can give a time of day suffixed with
! 142: .Nm AM
! 143: or
! 144: .Nm PM
! 145: for running in the morning or the evening. You can
! 146: also specify the date on which the job will be run
! 147: by giving a date in the form
! 148: .Ar month-name day
! 149: with an optional
! 150: .Ar year ,
! 151: or giving a date of the form
! 152: .Ar MMDDYY ,
! 153: .Ar MM/DD/YY
! 154: or
! 155: .Ar DD.MM.YY .
! 156: You can also give times like
! 157: .Nm now +
! 158: .Ar count time-units ,
! 159: where the time units can be
! 160: .Nm minutes, hours, days,
! 161: or
! 162: .Nm weeks
! 163: You can suffix the time with
! 164: .Nm today
! 165: to run the job today, or
! 166: .Nm tomorrow
! 167: to run the job tomorrow.
! 168: .Pp
! 169: For example, to run a job at 4PM three days from now, you
! 170: would specify a time of
! 171: .Nm 4PM + 3 days .
! 172: To run a job at 10:00AM on on July 31, you would specify
! 173: a time of
! 174: .Nm 10AM Jul 31 .
! 175: Finally, to run a job at 1AM tomorrow, you would specify
! 176: a time of
! 177: .Nm 1AM tomorrow .
! 178: .Sh FILES
! 179: .Bl -tag -width /var/at/lockfile -compact
! 180: .It Pa /var/at/jobs
! 181: Directory containing job files
! 182: .It Pa /var/at/spool
! 183: Directory containing output spool files
! 184: .It Pa /var/at/lockfile
! 185: Job-creation lock file.
! 186: .It Pa /var/run/utmp
! 187: .El
! 188: .Sh SEE ALSO
! 189: .Xr cron 8 ,
! 190: .Xr nice 1 ,
! 191: .Xr sh 1 ,
! 192: .Xr atrun 8
! 193: .Sh AUTHOR
! 194: .Bl -tag
! 195: Thomas Koenig, ig25@rz.uni-karlsruhe.de
! 196: .El
! 197: .Sh BUGS
! 198: Traditional access control to
! 199: .Nm at
! 200: and
! 201: .Nm batch
! 202: via the files
! 203: .Pa /var/at/at.allow
! 204: and
! 205: .Pa /var/at/at.deny
! 206: is not implemented.
! 207: .Pp
! 208: If the file
! 209: .Pa /var/run/utmp
! 210: is not available or corrupted, or if the user is not
! 211: logged in at the time
! 212: .Nm at
! 213: is invoked, the mail is sent to the userid found in the
! 214: environment variable
! 215: .Nm LOGNAME .
! 216: If that is undefined or empty, the current userid is assumed.
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