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STICKY(7)		Miscellaneous Information Manual	     STICKY(7)

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 <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  re-
       stricted.   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 su-
       per-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 sticky	command	appeared in Version 7 AT&T UNIX/32V.

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

FreeBSD	14.3			 June 5, 1993			     STICKY(7)

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