Function seccomp_api_get 

pub unsafe extern "C" fn seccomp_api_get() -> c_uint

Query the library’s level of API support

This function returns an API level value indicating the current supported functionality. It is important to note that this level of support is determined at runtime and therefore can change based on the running kernel and system configuration (e.g. any previously loaded seccomp filters). This function can be called multiple times, but it only queries the system the first time it is called, the API level is cached and used in subsequent calls.

The current API levels are described below:

• 0
  • reserved
• 1
  • base level
• 2
  • support for the SCMP_FLTATR_CTL_TSYNC filter attribute
  • uses the seccomp(2) syscall instead of the prctl(2) syscall
• 3
  • support for the SCMP_FLTATR_CTL_LOG filter attribute
  • support for the SCMP_ACT_LOG action
  • support for the SCMP_ACT_KILL_PROCESS action
• 4
  • support for the SCMP_FLTATR_CTL_SSB filter attribute
• 5
  • support for the SCMP_ACT_NOTIFY action and notify APIs
• 6
  • support the simultaneous use of SCMP_FLTATR_CTL_TSYNC and notify APIs
• 7
  • support for the SCMP_FLTATR_CTL_WAITKILL filter attribute