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#include <dnet.h>
#include <stdio.h>
#include <pwd.h>
#include <grp.h>
void
_droppriv(char *user, int do_chroot, char *chroot_path)
{
struct passwd *pw;
pw = getpwnam(user);
if (!pw)
err(1, "unknown user %s", user);
if (do_chroot) {
if (!chroot_path)
chroot_path = pw->pw_dir;
if (chroot(chroot_path) != 0)
err(1, "unable to chroot");
}
if (chdir("/") != 0)
err(1, "unable to chdir");
if (setgroups(1, &pw->pw_gid) == -1)
err(1, "setgroups() failed");
if (setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) == -1)
err(1, "setresgid failed");
if (setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) == -1)
err(1, "setresuid() failed");
endpwent();
}
int
main(int argc, char **argv) {
intf_t *intf;
struct addr dst;
struct intf_entry entry;
int err;
if (argc != 2) {
printf("usage: %s <ip>\n", argv[0]);
return 1;
}
addr_aton(argv[1], &dst);
printf("dst: %s\n", addr_ntoa(&dst));
_droppriv("nobody", 1, NULL); /* bad practise, use dedicated user */
intf = intf_open();
err = intf_get_dst(intf, &entry, &dst);
if (err < 0) {
printf("intf_get_dst error !\n");
return 2;
}
printf("entry:\n");
printf(" intf_name: %s\n", entry.intf_name);
printf(" intf_addr: %s\n", addr_ntoa(&entry.intf_addr));
printf(" intf_link_addr: %s\n", addr_ntoa(&entry.intf_link_addr));
return 0;
}
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