how to access files via their descriptors?

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utmpx

utmpx(4)							   File Formats 							  utmpx(4)

NAME

       utmpx, wtmpx - utmpx and wtmpx database entry formats

SYNOPSIS

       #include <utmpx.h>
       /var/adm/utmpx
       /var/adm/wtmpx

DESCRIPTION

       The utmpx and wtmpx files are extended database files that have superseded the obsolete utmp and wtmp database files.

       The  utmpx database contains user access and accounting information for commands such as who(1), write(1), and login(1). The wtmpx database
       contains the history of user access and accounting information for the  utmpx database.

USAGE

       Applications should not access these databases directly, but should use the functions described on the getutxent(3C) manual page to  inter-
       act with the utmpx and wtmpx databases to ensure that they are maintained consistently.

FILES

       /var/adm/utmpx	 user access and adminstration information

       /var/adm/wtmpx	 history of user access and adminstrative information

SEE ALSO

       getutxent(3C), wait(3C), wait.h(3HEAD)

SunOS 5.11							    6 Mar 2008								  utmpx(4)

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