Very Computer

by **Thomas B Bro** » Sat, 03 Dec 1994 06:02:42

is there a routine on sunos called uptime()? (as opposed to the shell
command). if not, is there a routine i can call in C to tell me the
number of users on a system?

regards,
tom

by **Tod McQuill** » Sat, 03 Dec 1994 11:33:36

Quote:> is there a routine on sunos called uptime()? (as opposed to the shell
> command). if not, is there a routine i can call in C to tell me the
> number of users on a system?

stat(2) the utmp file. divide the size in bytes by the size of a
struct utmp (see utmp.h).

by **Thomas B Bro** » Tue, 06 Dec 1994 09:03:54

thanks to everyone who replied on this question. the easiest solution
so far has been to use rnusers().

regards,
tom

by **Jim Re** » Wed, 07 Dec 1994 02:23:57

> is there a routine on sunos called uptime()? (as opposed to the shell
> command). if not, is there a routine i can call in C to tell me the
> number of users on a system?

stat(2) the utmp file. divide the size in bytes by the size of a
struct utmp (see utmp.h).

But this assumes that every active user on the system has exactly one
entry in the utmp file. This isn't necessarily so: some vendors leave
/etc/utmp world writeable! Also, many window systems like to create a
utmp entry for every "shell window" the user opens.