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MapOpenFailed(2) when SYSTEM user open shared memory created by common user #97

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21pages opened this issue Nov 3, 2022 · 2 comments
Open

MapOpenFailed(2) when SYSTEM user open shared memory created by common user #97

21pages opened this issue Nov 3, 2022 · 2 comments

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@21pages
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21pages commented Nov 3, 2022 •
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error line
@21pages
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21pages commented Nov 3, 2022 •
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It's created by this crate, but need to set allow_raw=true, maybe not properly. If set, it can work

@einar-itm
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Not sure if this is related, but I got the same error because open_mapping assumes write permissions in the file-system when reusing an existing mapping. I am not sure if this counts as bug report or a feature request.

shared_memory/src/unix.rs

Line 160 in 344a5c4

OFlag::O_RDWR, //Open read write

Workaround: chmod u+w /dev/shmem/my_shmem

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@21pages @einar-itm