sa.8

UNIX v6源代码 这几乎是最经典的unix版本 unix操作系统设计和莱昂氏unix源代码分析都是用的该版

.th SA VIII 6/1/74
.sh NAME
sa \*- Shell accounting
.sh SYNOPSIS
sa [
.bd \*-abcjlnrstuv
] [ file ]
.sh DESCRIPTION
When a user logs in,
if the Shell is able to open the file
.it /usr/adm/sha,
then as each command completes the Shell writes at the end of this file
the name of the command, the user, system, and real
time consumed,
and the user ID.
.it Sa
reports on, cleans up, and generally maintains this and other
accounting files.
To turn accounting on and off,
the accounting file must be created or destroyed
externally.
.s3
.it Sa
is able to condense
the information in
.it /usr/adm/sha
into a summary file
.it /usr/adm/sht
which contains a count of the
number of times each command was called and the time resources
consumed.
This condensation is desirable because on a large system
.it sha
can grow by 100 blocks per day.
The summary file is read before the accounting file,
so the reports include all available information.
.s3
If a file name is given as the last argument,
that file will be treated
as the accounting file;
.it sha
is the default.
There are zillions of options:
.s3
.de qq
.s3
.lp +3 3
\fB\\$1\fR	\\
..
.qq a
Place all command names containing unprintable characters
and those used only once under the name ``***other.''
.qq b
Sort output by sum of user and system time divided by number of
calls.
Default sort is by sum of user and system times.
.qq c
Besides total user, system, and real time for each command print percentage
of total time over all commands.
.qq j
Instead of total minutes time for each category,
give seconds per call.
.qq l
Separate system and user time; normally they are combined.
.qq n
Sort by number of calls.
.qq r
Reverse order of sort.
.qq s
Merge accounting file into summary file
.it /usr/adm/sht
when done.
.qq t
For each command report ratio of real time to the sum of user and
system times.
.qq u
Superseding all other flags,
print for each command in the accounting file the
day of the year, time, day of the week,
user ID and command name.
.qq v
If the next character is a digit
.it n,
then type the name of
each command used
.it n
times or fewer.
Await a reply from the typewriter;
if it begins with ``y'', add the command to
the category ``**junk**.''
This is used to strip out garbage.
.i0
.dt
.sh FILES
/usr/adm/sha	accounting
.br
/usr/adm/sht	summary
.sh "SEE ALSO"
ac (VIII)
.sh BUGS