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OpenSolaris 2009.06 - man page for sticky (opensolaris section 5)

sticky(5)		       Standards, Environments, and Macros			sticky(5)

NAME
       sticky - mark files for special treatment

DESCRIPTION
       The  sticky bit (file mode bit  01000, see chmod(2)) is used to indicate special treatment
       of certain files and directories. A directory for which the sticky bit  is  set	restricts
       deletion  of  files  it	contains.   A  file  in a sticky directory can only be removed or
       renamed by a user who has write permission on the directory, and  either  owns  the  file,
       owns the directory, has write permission on the file, or is a privileged user. Setting the
       sticky bit is useful for directories such as /tmp, which must  be  publicly  writable  but
       should deny users permission to arbitrarily delete or rename the files of others.

       If  the sticky bit is set on a regular file and no execute bits are set, the system's page
       cache will not be used to hold the file's data. This bit is normally set on swap files  of
       diskless  clients so that accesses to these files do not flush more valuable data from the
       system's cache. Moreover, by default such files are treated as  swap  files,  whose  inode
       modification times may not necessarily be correctly recorded on permanent storage.

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

SEE ALSO
       chmod(1), chmod(2), chown(2), mkdir(2), rename(2), unlink(2)

BUGS
       The mkdir(2) function will not create a directory with the sticky bit set.

SunOS 5.11				    1 Aug 2002					sticky(5)


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