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 wtmps(4)                                                           wtmps(4)

 NAME    [Toc]    [Back]
      wtmps, btmps - user login information

 SYNOPSIS    [Toc]    [Back]
      #include <sys/types.h>
      #include <utmps.h>

 DESCRIPTION    [Toc]    [Back]
      wtmps and btmps hold user and accounting information for such commands
      as last, who, write, and login (see last(1), who(1), write(1), and

      File btmps contains bad login entries for each invalid logon attempt.
      File wtmps contains a record for all logins and logouts apart from
      accounting records.  These files contain utmps-like structure, the key
      elements of the structure are given below:

                   char ut_user[]            User login name
                   char ut_id[]              Unique Id to distinguish an entry
                   char ut_line[]            Device name
                   pid_t ut_pid              Process Id
                   short ut_type             Type of Entry
                   struct ut_exit            The exit status of a process
                   struct timeval ut_tv      Time entry was made
                   char ut_host[]            Host name, if remote
                   uint8_t ut_addr[]         Internet Address of the Host,
                                             if remote
                   short ut_addr_type        Flag to identify type of address
                                             in ut_addr

           #define WTMPS_FILE  "/var/adm/wtmps"
           #define BTMPS_FILE  "/var/adm/btmps"

      Note that wtmps and btmps tend to grow without bound, and should be
      checked regularly.  Information that is no longer useful should be
      removed periodically to prevent the file from becoming too large.
      Also note that wtmps and btmps are not created by the programs that
      maintain them.  Thus, if these files are removed, login record-keeping
      is turned off.

 AUTHOR    [Toc]    [Back]
      wtmps and btmps were developed by Hewlett-Packard Company.

 FILES    [Toc]    [Back]

 SEE ALSO    [Toc]    [Back]
      last(1), login(1), who(1), write(1), acctcon(1M), fwtmp(1M),
      wtmpfix(1M), getuts(3C).

 Hewlett-Packard Company            - 1 -   HP-UX 11i Version 2: August 2003
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