feature_present(3) BSD Library Functions Manual feature_present(3)NAMEfeature_present — query presence of a kernel feature
Standard C Library (libc, -lc)
feature_present(const char *feature);
The feature_present() function provides a method for an application to
determine if a specific kernel feature is present in the currently run‐
ning kernel. The feature argument specifies the name of the feature to
check. The feature_present() function will return 1 if the specified
feature is present, otherwise it will return 0. If the feature_present()
function is not able to determine the presence of feature due to an
internal error it will return 0.
If feature is present then 1 is returned; otherwise 0 is returned.
SEE ALSOsysconf(3), sysctl(3)HISTORY
The feature_present() function first appeared in FreeBSD 8.0.
BSD January 8, 2008 BSD