Manual Pages  — CAP_NETDB

#include <sys/nv.h>

#include <libcasper.h>

#include <casper/cap_netdb.h>

cap_channel_t *capcas, *capnetdb;
struct protoent *ent;

/* Open capability to Casper. */
capcas = cap_init();
if (capcas == NULL)
        err(1, "Unable to contact Casper");

/* Enter capability mode sandbox. */
if (caph_enter() < 0)
        err(1, "Unable to enter capability mode");

/* Use Casper capability to create capability to the system.netdb service. */
capnetdb = cap_service_open(capcas, "system.netdb");
if (capnetdb == NULL)
        err(1, "Unable to open system.netdb service");

/* Close Casper capability, we don't need it anymore. */
cap_close(capcas);

ent = cap_getprotobyname(capnetdb, "http");
if (ent == NULL)
       errx(1, "cap_getprotobyname failed to find http proto");