getutxent(3) - NetBSD Manual Pages

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ENDUTXENT(3)            NetBSD Library Functions Manual           ENDUTXENT(3)


NAME

     endutxent, getutxent, getutxid, getutxline, pututxline, setutxent -- user
     accounting database functions


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <utmpx.h>

     void
     endutxent(void);

     struct utmpx *
     getutxent(void);

     struct utmpx *
     getutxid(const struct utmpx *);

     struct utmpx *
     getutxline(const struct utmpx *);

     struct utmpx *
     pututxline(const struct utmpx *);

     void
     setutxent(void);


DESCRIPTION

     These functions provide access to the utmpx(5) user accounting database.

     getutxent() reads the next entry from the database; if the database was
     not yet open, it also opens it.  setutxent() resets the database, so that
     the next getutxent() call will get the first entry.  endutxent() closes
     the database.

     getutxid() returns the next entry of the type specified in its argument's
     ut_type field, or NULL if none is found.  getutxline() returns the next
     LOGIN_PROCESS or USER_PROCESS entry which has the same name as specified
     in the ut_line field, or NULL if no match is found.

     pututxline() adds the argument utmpx(5) entry line to the accounting
     database, replacing a previous entry for the same user if it exists.

   The utmpx structure
     The utmpx structure has the following definition:

     struct utmpx {
             char ut_name[_UTX_USERSIZE];    /* login name */
             char ut_id[_UTX_IDSIZE];        /* inittab id */
             char ut_line[_UTX_LINESIZE];    /* tty name */
             char ut_host[_UTX_HOSTSIZE];    /* host name */
             uint16_t ut_session;            /* session id used for windowing */
             uint16_t ut_type;               /* type of this entry */
             pid_t ut_pid;                   /* process id creating the entry */
             struct {
                     uint16_t e_termination; /* process termination signal */
                     uint16_t e_exit;        /* process exit status */
             } ut_exit;
             struct sockaddr_storage ut_ss;  /* address where entry was made from */
             struct timeval ut_tv;           /* time entry was created */
             uint32_t ut_pad[10];            /* reserved for future use */
     };

     Valid entries for ut_type are:
           BOOT_TIME        Time of a system boot.
           DEAD_PROCESS     A session leader exited.
           EMPTY            No valid user accounting information.
           INIT_PROCESS     A process spawned by init(8).
           LOGIN_PROCESS    The session leader of a logged-in user.
           NEW_TIME         Time after system clock change.
           OLD_TIME         Time before system clock change.
           RUN_LVL          Run level.  Provided for compatibility, not used
                            on NetBSD.
           USER_PROCESS     A user process.


RETURN VALUES

     getutxent() returns the next entry, or NULL on failure (end of database
     or problems reading from the database).  getutxid() and getutxline()
     return the matching structure on success, or NULL if no match was found.
     pututxline() returns the structure that was successfully written, or
     NULL.


SEE ALSO

     logwtmpx(3), utmpx(5)


STANDARDS

     The endutxent(), getutxent(), getutxid(), getutxline(), pututxline(),
     setutxent() all conform to IEEE Std 1003.1-2001 (``POSIX.1'') (XSI exten-
     sion), and previously to X/Open Portability Guide Issue 4, Version 2
     (``XPG4.2'').  The fields ut_user, ut_id, ut_line, ut_pid, ut_type, and
     ut_tv conform to IEEE Std 1003.1-2001 (``POSIX.1'') (XSI extension), and
     previously to X/Open Portability Guide Issue 4, Version 2 (``XPG4.2'').

NetBSD 5.1                    September 26, 2002                    NetBSD 5.1