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authorRich Felker <dalias@aerifal.cx>2012-09-30 19:35:40 -0400
committerRich Felker <dalias@aerifal.cx>2012-09-30 19:35:40 -0400
commitbf258341b71711461ce19891674d43c135827d0e (patch)
tree29b3526a1039a2b5cce1eb73a67a99a2f6fcf0cd /include
parent6e2372a86c7e862ed931910f8a5f4b908639d689 (diff)
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overhaul sem_open
this function was overly complicated and not even obviously correct. avoid using openat/linkat just like in shm_open, and instead expand pathname using code shared with shm_open. remove bogus (and dangerous, with priorities) use of spinlocks. this commit also heavily streamlines the code and ensures there are no failure cases that can happen after a new semaphore has been created in the filesystem, since that case is unreportable.
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