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Full Discussion: mmap and select
Top Forums UNIX for Advanced & Expert Users mmap and select Post 302230955 by Hitori on Monday 1st of September 2008 06:11:15 AM
Old 09-01-2008
mmap and select

I'm using select() to monitor multiple file descriptors (inet sockets) in application. But this application must also collaborate with other applications on the same host via shared memory (mmap'ed file) due to performance reasons. How can I become notification that mmaped memory is changed or semaphore state changed when the application is blocked in select()? For instance, can I perform select() (or epoll()) on the file descriptor that is mapp'ed to memory or should I use signals or something else?
 

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PKCSSLOTD(8)							   openCryptoki 						      PKCSSLOTD(8)

NAME
pkcsslotd - shared memory manager for opencryptoki DESCRIPTION
The pkcsslotd daemon manages PKCS#11 objects between PKCS#11-enabled applications. When 2 or more processes are accessing the same crypto- graphic token, the daemon is notified and updates each application when the token's objects change. NOTES
Only one instance of the pkcsslotd daemon should be running on any given host. If a prior instance of pkcsslotd did not shut down cleanly, then it may leave an allocated shared memory segment on the system. The allocated memory segment can be identified by its key and can be safely removed once the daemon is stopped with the ipcrm command, such as: ipcrm -M 0x6202AB38 In order to prevent a denial of service against the daemon, the shared memory segment is created with group ownership by the "pkcs11" group. Any application that requires access to a pkcs11 token must be run by a user who's a member of the "pkcs11" group. SEE ALSO
opencryptoki(7), pkcsconf(1), pk_config_data(5), pkcs11_startup(1). 2.3.1 May 2007 PKCSSLOTD(8)
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