/usr/include/net-snmp/system/freebsd2.h is in libsnmp-dev 5.7.3+dfsg-1.7+deb9u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | #include "freebsd.h"
/*
* this is not good enough before freebsd3!
*/
#undef HAVE_NET_IF_MIB_H
#undef PROC_SYMBOL
#undef NPROC_SYMBOL
#undef LOADAVE_SYMBOL
#undef TOTAL_MEMORY_SYMBOL
|