06-17-2003
Getting uptime
I'm trying to get the uptime of my computer (Mac OS X) and I can go into the terminal and type "uptime" OK, and that gives me a string with the uptime in it. The problem is that the string changes a lot, and its very difficult to get the data I'm trying to extract out cleanly.
Now I have 3 options to get the time:
a) Use a lot of complicated, very messy and pretty damn in-efficient code to get the data, and have occasional errors in the display.
b) Find the kernel that is accessed to get the uptime before its parsed and outputted in the terminal, and get it manually myself.
c) Find out how long a process that was opened at boot time (eg. init) has been running, and that will be my boot time.
The second two options are the ones i'm trying to use, but I don't know how to do either of those things.
Can someone here give me a little help how to do these things?
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LEARN ABOUT MOJAVE
ruptime
ruptime(1) User Commands ruptime(1)
NAME
ruptime - show host status of local machines
SYNOPSIS
ruptime [-ar] [-l | -t | -u]
DESCRIPTION
The ruptime utility gives a status line like uptime (see uptime(1)) for each machine on the local network; these are formed from packets
broadcast by each host on the network approximately every three minutes.
Machines for which no status report has been received for 11 minutes are shown as being down.
Normally, the listing is sorted by host name, but this order can be changed by specifying one of the options listed below.
OPTIONS
The following options are supported:
-a Counts even those users who have been idle for an hour or more.
-r Reverses the sorting order.
-l | -t | -u These options are mutually exclusive. The use of one overrides the previous one(s).
-l Sorts the display by load average.
-t Sorts the display by up time.
-u Sorts the display by number of users.
FILES
/var/spool/rwho/whod.* data files
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWrcmdc |
+-----------------------------+-----------------------------+
SEE ALSO
uptime(1), rwho(1), in.rwhod(1M), attributes(5)
SunOS 5.10 6 Nov 2000 ruptime(1)