NAME
proto — prototype job file for at(1)
SYNOPSIS
/var/adm/cron/.proto
/var/adm/cron/.proto. queue
DESCRIPTION
When a job is submitted to
at
or
batch,
the job is constructed as a Bourne shell script (see
at(1)).
The job file is created in
/var/spool/cron/atjobs
as follows:
at
creates a header describing the job as an
at
job or a
batch
job.
at
jobs submitted to all queues other than queue
a
are listed as
batch
jobs.
The header is:
- : at job
for an
at
job, or
- : batch job
for a
batch
job.
A set of Bourne shell commands is added to make the environment (see
environ(5))
for the
at
job the same as the current environment.
at
then copies text from the prototype file to the job file,
except for special
variables
that are replaced by other text:
- $d
Replaced by the current working directory.
- $l
Replaced by the current file size limit (see
ulimit(2)).
- $m
Replaced by the current umask (see
umask(2)).
- $t
Replaced by the time at which the job should be run,
expressed as seconds since January 1, 1970,
00:00 Coordinated Universal Time, preceded by a colon.
- $<
Replaced by text read by
at
from the standard input (that is, the commands provided to
at
to be run in the job).
When a job is submitted to queue
queue,
at
uses the file
/var/adm/cron/.proto.queue
as the prototype file if it exists.
Otherwise it uses the file
/var/adm/cron/.proto.
EXAMPLES
The following
.proto
file creates commands to change the current directory,
file size limit, and umask in the job
to their respective values as they existed when
at
was originally run.
These commands are inserted before the commands in the job:
cd $d
ulimit $l
umask $m
$<
STANDARDS CONFORMANCE
proto: SVID2, SVID3
