1#define _GNU_SOURCE
 2
 3#include <stdio.h>
 4#include <unistd.h>
 5#include <bpf/libbpf.h>
 6
 7int main(int argc, char **argv)
 8{
 9	struct bpf_link *link = NULL;
10	struct bpf_program *prog;
11	struct bpf_object *obj;
12	char filename[256];
13	char command[256];
14	int ret = 0;
15	FILE *f;
16
17	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
18	obj = bpf_object__open_file(filename, NULL);
19	if (libbpf_get_error(obj)) {
20		fprintf(stderr, "ERROR: opening BPF object file failed\n");
21		return 0;
22	}
23
24	prog = bpf_object__find_program_by_name(obj, "bpf_prog1");
25	if (!prog) {
26		fprintf(stderr, "ERROR: finding a prog in obj file failed\n");
27		goto cleanup;
28	}
29
30	/* load BPF program */
31	if (bpf_object__load(obj)) {
32		fprintf(stderr, "ERROR: loading BPF object file failed\n");
33		goto cleanup;
34	}
35
36	link = bpf_program__attach(prog);
37	if (libbpf_get_error(link)) {
38		fprintf(stderr, "ERROR: bpf_program__attach failed\n");
39		link = NULL;
40		goto cleanup;
41	}
42
43	snprintf(command, 256, "mount %s tmpmnt/", argv[1]);
44	f = popen(command, "r");
45	ret = pclose(f);
46
47cleanup:
48	bpf_link__destroy(link);
49	bpf_object__close(obj);
50	return ret ? 0 : 1;
51}