Source: proftpd-mod-counter Section: net Priority: optional Maintainer: ProFTPD Maintainance Team Uploaders: Mahyuddin Susanto , Francesco Paolo Lovergine , Hilmar Preusse Build-Depends: debhelper-compat (= 13), proftpd-dev (>= 1.3.6~) Standards-Version: 4.5.1 Rules-Requires-Root: no Homepage: http://www.castaglia.org/proftpd/modules/mod_counter.html Vcs-Git: https://salsa.debian.org/debian-proftpd-team/proftpd-mod-counter.git Vcs-Browser: https://salsa.debian.org/debian-proftpd-team/proftpd-mod-counter Package: proftpd-mod-counter Architecture: any Depends: ${misc:Depends}, ${proftpd:Depends}, ${shlibs:Depends} Description: ProFTPD module mod_counter The mod_counter module is designed to allow a sort of "locking" to be enforced when the same file is being uploaded or downloaded by multiple clients at the same time. . The mod_counter works by creating a SysV semaphore for a file being read/written, and placing a number of reader or writer "counters" in that semaphore. When the configured maximum number of counters is reached, the FTP command which seeks to add another reader/writer counter will be denied. This allows site to configure the maximum number of clients which can be reading/writing any file at one time.