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#include <unistd.h>
#include <linux/filter.h>
#include <linux/seccomp.h>
#include <sys/syscall.h>
#include <err.h>
#include <sys/prctl.h>
#include <stddef.h>
#include <stdio.h>
int main(int argc, char **argv)
{
struct sock_filter filter[] = {
BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW),
};
struct sock_fprog prog = {
.len = (unsigned short)(sizeof(filter)/sizeof(filter[0])),
.filter = filter,
};
if (argc < 2) {
printf("Usage: null_seccomp PATH ARGS...\n");
return 1;
}
if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0))
err(1, "PR_SET_NO_NEW_PRIVS");
if (prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog))
err(1, "PR_SET_SECCOMP");
execv(argv[1], argv + 1);
err(1, argv[1]);
}
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