The OpenNET Project / Index page

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

Интерактивная система просмотра системных руководств (man-ов)

 ТемаНаборКатегория 
 
 [Cписок руководств | Печать]

umask (3)
  • umask (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • umask (1) ( FreeBSD man: Команды и прикладные программы пользовательского уровня )
  • umask (1) ( Русские man: Команды и прикладные программы пользовательского уровня )
  • umask (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • umask (1) ( POSIX man: Команды и прикладные программы пользовательского уровня )
  • umask (2) ( Solaris man: Системные вызовы )
  • umask (2) ( FreeBSD man: Системные вызовы )
  • umask (2) ( Русские man: Системные вызовы )
  • umask (2) ( Linux man: Системные вызовы )
  • >> umask (3) ( POSIX man: Библиотечные вызовы )
  •  

    NAME

    umask - set and get the file mode creation mask
     
    

    SYNOPSIS

    #include <sys/stat.h>

    mode_t umask(mode_t cmask);
     

    DESCRIPTION

    The umask() function shall set the process' file mode creation mask to cmask and return the previous value of the mask. Only the file permission bits of cmask (see <sys/stat.h>) are used; the meaning of the other bits is implementation-defined.

    The process' file mode creation mask is used during open(), creat(), mkdir(), and mkfifo() to turn off permission bits in the mode argument supplied. Bit positions that are set in cmask are cleared in the mode of the created file.  

    RETURN VALUE

    The file permission bits in the value returned by umask() shall be the previous value of the file mode creation mask. The state of any other bits in that value is unspecified, except that a subsequent call to umask() with the returned value as cmask shall leave the state of the mask the same as its state before the first call, including any unspecified use of those bits.  

    ERRORS

    No errors are defined.

    The following sections are informative.  

    EXAMPLES

    None.  

    APPLICATION USAGE

    None.  

    RATIONALE

    Unsigned argument and return types for umask() were proposed. The return type and the argument were both changed to mode_t.

    Historical implementations have made use of additional bits in cmask for their implementation-defined purposes. The addition of the text that the meaning of other bits of the field is implementation-defined permits these implementations to conform to this volume of IEEE Std 1003.1-2001.  

    FUTURE DIRECTIONS

    None.  

    SEE ALSO

    creat() , mkdir() , mkfifo() , open() , the Base Definitions volume of IEEE Std 1003.1-2001, <sys/stat.h>, <sys/types.h>  

    COPYRIGHT

    Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUE
    ERRORS
    EXAMPLES
    APPLICATION USAGE
    RATIONALE
    FUTURE DIRECTIONS
    SEE ALSO
    COPYRIGHT


    Поиск по тексту MAN-ов: 




    Спонсоры:
    Inferno Solutions
    Hosting by Hoster.ru
    Хостинг:

    Закладки на сайте
    Проследить за страницей
    Created 1996-2022 by Maxim Chirkov
    Добавить, Поддержать, Вебмастеру