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Annotation of researchv10dc/man/adm/man1/at.1, revision 1.1.1.1

1.1       root        1: .TH AT 1
                      2: .CT 1 time_man
                      3: .SH NAME
                      4: at \(mi execute commands at a later time
                      5: .SH SYNOPSIS
                      6: .B at
                      7: [
                      8: .B -r
                      9: ]
                     10: .I time
                     11: [
                     12: .I day
                     13: ]
                     14: [
                     15: .I file
                     16: ]
                     17: .PP
                     18: .B at -l
                     19: .SH DESCRIPTION
                     20: .I At
                     21: squirrels away a copy of the named
                     22: .I file
                     23: (standard input default)
                     24: to be used as input to
                     25: .IR sh (1)
                     26: at a specified later time.
                     27: A
                     28: .I cd
                     29: command to the current directory is inserted
                     30: at the beginning,
                     31: followed by assignments to all environment variables.
                     32: When the script is run, it uses the userid and groupid
                     33: of the creator of the copy.
                     34: .PP
                     35: The
                     36: .I time
                     37: is 1 to 4 digits, with an optional following
                     38: .LR A ,
                     39: .LR P ,
                     40: .L N
                     41: or 
                     42: .L M
                     43: for
                     44: AM, PM, noon or midnight.
                     45: One and two digit numbers are taken to be hours, three and four digits
                     46: to be hours and minutes.
                     47: If no letters follow the digits, a 24 hour clock time is understood.
                     48: .PP
                     49: The optional
                     50: .I day
                     51: is either a month name followed by a day number,
                     52: or a day of the week; if the word
                     53: .L week
                     54: follows, invocation is moved seven days further off.
                     55: Names of months and days may be recognizably truncated.
                     56: A year number, spelled out in full, may follow the month.
                     57: .PP
                     58: The options are
                     59: .TP
                     60: .B -r
                     61: Remove the specified activity.
                     62: .TP
                     63: .B -l
                     64: List all activities scheduled for this user.
                     65: .PP
                     66: .I At
                     67: programs are executed by periodic execution
                     68: of
                     69: .F /usr/lib/atrun
                     70: from
                     71: .IR cron (8).
                     72: The granularity of
                     73: .I at
                     74: depends upon how often
                     75: .I atrun
                     76: is executed.
                     77: .PP
                     78: The standard output and standard error files are lost unless redirected.
                     79: .SH EXAMPLES
                     80: .EX
                     81: at 0800 dec 24
                     82: echo ho ho ho | mail claus
                     83: .EE
                     84: .TP
                     85: .L
                     86: at -r `at -l`
                     87: Remove a scheduled activity.
                     88: .SH FILES
                     89: .TF /usr/spool/at/yy.ddd.hhmm
                     90: .TP
                     91: .F /usr/lib/atrun
                     92: .TP
                     93: .BI  /usr/spool/at/ yy . ddd . hhmm\fP.*
                     94: activity for year, day, hour
                     95: .TP
                     96: .F /usr/spool/at/lasttimedone
                     97: last
                     98: .I hhmm
                     99: .TP
                    100: .F /usr/spool/at/past
                    101: activities in progress
                    102: .SH "SEE ALSO"
                    103: .IR calendar (1),
                    104: .IR pwd (1),
                    105: .IR sleep (1),
                    106: .IR cron (8)
                    107: .SH BUGS
                    108: Due to the granularity of the execution of
                    109: .I atrun,
                    110: there may be bugs in scheduling things almost
                    111: exactly 24 hours into the future.

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