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API: Add BPF capabilities utility #39

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API: Add BPF capabilities utility #39

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1 change: 1 addition & 0 deletions src/BPFnative.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,7 @@ end
include("utils.jl")
include("common.jl")
include("libbpf.jl")
include("libcap.jl")
if Sys.islinux()
include("network.jl")
end
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17 changes: 17 additions & 0 deletions src/libcap.jl
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Original file line number Diff line number Diff line change
@@ -0,0 +1,17 @@
const libcap = "/usr/lib/libcap.so"

const CAP_PERFMON = Cint(39)
const CAP_BPF = Cint(39)
const CAP_EFFECTIVE = Cint(0)
const CAP_SET = Cint(1)

function add_cap_bpf!()
caps = ccall((:cap_get_proc, libcap), Ptr{Cvoid}, ())
cap_list = [CAP_BPF,CAP_PERFMON]
@assert ccall((:cap_set_flag, libcap), Cint,
(Ptr{Cvoid}, Cint, Cint, Ptr{Cvoid}, Cint),
caps, CAP_EFFECTIVE, length(cap_list), cap_list, CAP_SET) != 1
@assert ccall((:cap_set_proc, libcap), Cint, (Ptr{Cvoid},), caps) != -1
@assert ccall((:cap_free, libcap), Cint, (Ptr{Cvoid},), caps) != -1
return
end