sticky man page on MirBSD

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STICKY(8)		 BSD System Manager's Manual		     STICKY(8)

NAME
     sticky - sticky text and append-only directories

DESCRIPTION
     A special file mode, called the sticky bit (mode S_ISVTX), is used to in-
     dicate special treatment for files and directories. See chmod(2) or the
     file /usr/include/sys/stat.h for an explanation of file modes.

STICKY FILES
     Historically, an executable shareable file which had the sticky bit set
     was not immediately discarded from swap space after execution. The kernel
     hoarded the text segment of the file for future reuse, thus avoiding hav-
     ing to reload the program. This is no longer true on modern systems; the
     current virtual memory system keeps track of recently used executables,
     making the sticky bit for files redundant. The sticky bit can still be
     set on files, but without any effect.

     Only the superuser can set the sticky bit on a file, though the owner of
     the file may clear the sticky bit.

STICKY DIRECTORIES
     A directory with the 'sticky bit' set places restrictions on file dele-
     tion: a file in a sticky directory may only be removed or renamed by a
     user if the user has write permission for the directory and the user is
     the owner of the file, the owner of the directory, or the superuser. This
     feature is usefully applied to directories such as /tmp which must be
     publicly writable but should deny users the license to arbitrarily delete
     or rename each others' files.

     Any user may create a sticky directory. See chmod(1) for details about
     modifying file modes.

HISTORY
     A sticky command appeared in Version 32V AT&T UNIX.

BUGS
     Neither open(2) nor mkdir(2) will create a file with the sticky bit set.

MirOS BSD #10-current		 June 5, 1993				     1
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