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Annotation of cci/usr/src/man/man1/at.1, revision 1.1.1.1

1.1       root        1: .TH AT 1 "18 January 1983"
                      2: .UC 4
                      3: .SH NAME
                      4: at \- execute commands at a later time
                      5: .SH SYNOPSIS
                      6: .B at
                      7: time
                      8: [
                      9: day
                     10: ]
                     11: [
                     12: file
                     13: ]
                     14: .SH DESCRIPTION
                     15: .I At
                     16: squirrels away a copy of the named
                     17: .I file
                     18: (standard input default)
                     19: to be used as input to
                     20: .IR sh (1)
                     21: (or
                     22: .IR csh (1)
                     23: if you normally use it)
                     24: at a specified later time.
                     25: A
                     26: .I cd
                     27: command to the current directory is inserted
                     28: at the beginning,
                     29: followed by assignments to all environment variables (excepting the
                     30: variable TERM, which is useless in this context.)
                     31: When the script is run, it uses the user and group ID
                     32: of the creator of the copy file.
                     33: .PP
                     34: The
                     35: .I time
                     36: is 1 to 4 digits, with an optional following
                     37: `A', `P', `N' or `M' for
                     38: AM, PM, noon or midnight.
                     39: One and two digit numbers are taken to be hours, three and four digits
                     40: to be hours and minutes.
                     41: If no letters follow the digits, a 24 hour clock time is understood.
                     42: .PP
                     43: The optional
                     44: .I day
                     45: is either
                     46: (1) a month name followed by a day number,
                     47: or
                     48: (2) a day of the week; if the word `week' follows
                     49: invocation is moved seven days further off.
                     50: Names of months and days may be recognizably truncated.
                     51: Examples of legitimate commands are
                     52: .IP
                     53: at 8am jan 24
                     54: .br
                     55: at 1530 fr week
                     56: .PP
                     57: .I At
                     58: programs are executed by periodic execution
                     59: of the command
                     60: .I /usr/lib/atrun
                     61: from
                     62: .IR cron (8).
                     63: The granularity of
                     64: .I at
                     65: depends upon how often
                     66: .I atrun
                     67: is executed.
                     68: .PP
                     69: Standard output or error output is lost unless redirected.
                     70: .SH FILES
                     71: .ta 2i
                     72: /usr/lib/atrun executor (run by 
                     73: .IR cron (8)).
                     74: .sp
                     75: in /usr/spool/at:
                     76: .ta .5i 2i
                     77: .br
                     78: \&     yy.ddd.hhhh.*   activity for year yy, day dd, hour hhhh.
                     79: .br
                     80: \&     lasttimedone    last \fIhhhh\fR
                     81: .br
                     82: \&     past    activities in progress
                     83: .SH "SEE ALSO"
                     84: calendar(1),
                     85: pwd(1),
                     86: sleep(1),
                     87: cron(8)
                     88: .SH DIAGNOSTICS
                     89: Complains about various syntax errors and times out of range.
                     90: .SH BUGS
                     91: Due to the granularity of the execution of
                     92: .I /usr/lib/atrun,
                     93: there may be bugs in scheduling things almost
                     94: exactly 24 hours into the future.

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