The OpenNET Project / Index page

[ новости /+++ | форум | wiki | теги | ]

Интерактивная система просмотра системных руководств (man-ов)

 ТемаНаборКатегория 
 
 [Cписок руководств | Печать]

login (3)
  • login (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • login (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
  • login (1) ( Русские man: Команды и прикладные программы пользовательского уровня )
  • login (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • login (3) ( FreeBSD man: Библиотечные вызовы )
  • login (3) ( Русские man: Библиотечные вызовы )
  • >> login (3) ( Linux man: Библиотечные вызовы )
  • login (8) ( Русские man: Команды системного администрирования )
  • Ключ login обнаружен в базе ключевых слов.
  •  

    NAME

    login, logout - write utmp and wtmp entries
     
    

    SYNOPSIS

    #include <utmp.h>

    void login(const struct utmp *ut);

    int logout(const char *ut_line);

    Link with -lutil.  

    DESCRIPTION

    The utmp file records who is currently using the system. The wtmp file records all logins and logouts. See utmp(5).

    The function login() takes the supplied struct utmp, ut, and writes it to both the utmp and the wtmp file.

    The function logout() clears the entry in the utmp file again.  

    GNU Details

    More precisely, login() takes the argument ut struct, fills the field ut->ut_type (if there is such a field) with the value USER_PROCESS, and fills the field ut->ut_pid (if there is such a field) with the process ID of the calling process. Then it tries to fill the field ut->ut_line. It takes the first of stdin, stdout, stderr that is a tty, and stores the corresponding pathname minus a possible leading /dev/ into this field, and then writes the struct to the utmp file. On the other hand, if no tty name was found, this field is filled with "???" and the struct is not written to the utmp file. After this, the struct is written to the wtmp file.

    The logout() function searches the utmp file for an entry matching the ut_line argument. If a record is found, it is updated by zeroing out the ut_name and ut_host fields, updating the ut_tv timestamp field and setting ut_type (if there is such a field) to DEAD_PROCESS.  

    RETURN VALUE

    The logout() function returns 1 if the entry was successfully written to the database, or 0 if an error occurred.  

    FILES

    /var/run/utmp
    user accounting database, configured through _PATH_UTMP in <paths.h>
    /var/log/wtmp
    user accounting log file, configured through _PATH_WTMP in <paths.h>
     

    CONFORMING TO

    Not in POSIX.1-2001. Present on the BSDs.  

    NOTES

    Note that the member ut_user of struct utmp is called ut_name in BSD. Therefore, ut_name is defined as an alias for ut_user in <utmp.h>.  

    SEE ALSO

    getutent(3), utmp(5)  

    COLOPHON

    This page is part of release 3.14 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    GNU Details
    RETURN VALUE
    FILES
    CONFORMING TO
    NOTES
    SEE ALSO
    COLOPHON


    Поиск по тексту MAN-ов: 




    Спонсоры:
    Inferno Solutions
    Hosting by Hoster.ru
    Хостинг:

    Закладки на сайте
    Проследить за страницей
    Created 1996-2020 by Maxim Chirkov
    Добавить, Поддержать, Вебмастеру