CODEWITHSUNDEEP
cmake
CivFan
CivFan

Reputation: 15152

How do you add a permission to a cmake target without repeating the default permissions?

I would like to turn on the setuid bit for a program I'm installing using install(TARGETS... in cmake.

I can do this using the PERMISSIONS clause and specify SETUID. But when I do this, I lose all the default permissions unless I specify all of those, too.

For example, if this were bash, it would be like running chmod u=s,g=,o= file instead of chmod u+s file -- all the existing permissions are turned off instead of just masking in the one permission you want to add.

Is there a mechanism in cmake to add a permission to an installed target without repeating all the default permissions?

Upvotes: 0

Views: 2480

Answers (1)

Tsyvarev
Tsyvarev

Reputation: 66061

CMake has no other ways for set permissions for installed files except PERMISSIONS option for install command. But there are many ways for simplify permissions settings.

For example, you can define variable, contained default permissions set:

set(PROGRAM_PERMISSIONS_DEFAULT
    OWNER_WRITE OWNER_READ OWNER_EXECUTE
    GROUP_READ GROUP_EXECUTE
    WORLD_READ WORLD_EXECUTE)

and use it as base for add new permissions:

install(TARGETS myexe ... PERMISSIONS ${PROGRAM_PERMISSIONS_DEFAULT} SETUID)

If some set of permissions is used in many places, you can define variable, contained that set, and use it when needed:

set(PROGRAM_PERMISSIONS_BY_ROOT ${PROGRAM_PERMISSIONS_DEFAULT} SETUID)
...
install(TARGETS myexe ... PERMISSIONS ${PROGRAM_PERMISSIONS_BY_ROOT})

Upvotes: 3

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