>> sticky (8) ( FreeBSD man: Команды системного администрирования )
BSD mandoc
NAME
sticky
- sticky text and append-only directories
DESCRIPTION
A special file mode, called the
sticky bit
(mode S_ISTXT),
is used to indicate special treatment
for directories.
It is ignored for regular files.
See
chmod(2)
or
the file
#include <sys/stat.h>
for an explanation of file modes.
STICKY DIRECTORIES
A directory whose `sticky bit' is set
becomes an append-only directory, or, more accurately,
a directory in which the deletion of files is restricted.
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 super-user.
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
command appeared in
AT&T System
32v .
BUGS
Neither
open(2)
nor
mkdir(2)
will create a file with the sticky bit set.
