Interprocess tmp folder permission denied problem

[josephsieh@…]

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.

[Ion Gaztañaga]

Fixed for Boost 1.45 in release branch (folder is created without all access).