id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
4250	Interprocess tmp folder permission denied problem	josephsieh@…	Ion Gaztañaga	"shmData = new shared_memory_object (
		create_only,            
		shmDataName,			
		read_write
);

When shared_memory_object is created, IPC will create a tmp folder ""boost_interprocess"" in ""C:\ProgramData"" folder under Windows VISTA+, and in ""/tmp"" under Mac. Then start to create a file under ""boost_interprocess"" directory. 

The issue happens when user A call the IPC (C:\ProgramData\boost_interprocess"" will be created), then switch to another user B account, try to call the IPC again, then IPC will fail, due to ""boost_interprocess"" is already created by user A, therefore, user B has no permission to write anything into created ""boost_interprocess"" folder.

A quick fix of this problem might be modification of ""inline void get_tmp_base_dir(std::string &tmp_name)"" function in
""boost/interprocess/detail/tmp_dir_helpers.hpp"".

In line 103, instead of using the same ""/boost_interprocess"", maybe ""boost_interprocess_$username"" will be a solution for multiple users problem. 

This issue exists at least from 1.40.0 to 1.43.0."	Bugs	closed	Boost 1.45.0	interprocess	Boost 1.44.0	Problem	fixed