1 files changed, 27 insertions, 99 deletions

diff --git a/tests/helpers/test_enosys.c b/tests/helpers/test_enosys.c
index 9e93cc2..98f8d15 100644
--- a/tests/helpers/test_enosys.c
+++ b/tests/helpers/test_enosys.c
@@ -16,111 +16,39 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include <stddef.h>
-#include <stdbool.h>
-#include <getopt.h>
-
-#include <linux/unistd.h>
-#include <linux/filter.h>
-#include <linux/seccomp.h>
-#include <linux/audit.h>
-#include <sys/prctl.h>
-
-#include "c.h"
-#include "audit-arch.h"
-#include "exitcodes.h"
-
-#define syscall_nr (offsetof(struct seccomp_data, nr))
-
-struct syscall {
-	const char *const name;
-	int number;
-};
-
-const struct syscall syscalls[] = {
-#ifdef __NR_move_mount
-	{ "move_mount", __NR_move_mount },
-#endif
-#ifdef __NR_open_tree
-	{ "open_tree", __NR_open_tree },
-#endif
-#ifdef __NR_fsopen
-	{ "fsopen", __NR_fsopen },
-#endif
-#ifdef __NR_mount_setattr
-	{ "mount_setattr", __NR_mount_setattr },
-#endif
-
-};
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
 
 int main(int argc, char **argv)
 {
-	int c;
-	size_t i;
-	bool found;
-	static const struct option longopts[] = {
-		{ "syscall", required_argument, NULL, 's' },
-		{ 0 }
-	};
+	int r;
 
-	bool blocked_syscalls[ARRAY_SIZE(syscalls)] = {};
-
-	while ((c = getopt_long (argc, argv, "s:", longopts, NULL)) != -1) {
-		switch (c) {
-		case 's':
-			found = 0;
-			for (i = 0; i < ARRAY_SIZE(syscalls); i++) {
-				if (strcmp(optarg, syscalls[i].name) == 0) {
-					blocked_syscalls[i] = true;
-					found = 1;
-					break;
-				}
-			}
-			if (!found)
-				errx(EXIT_FAILURE, "Unknown syscall '%s'", optarg);
-			break;
-		default:
-			errx(EXIT_FAILURE, "Unknown option");
-		}
+	if (argc != 2) {
+		fprintf(stderr, "invalid options\n");
+		return EXIT_FAILURE;
 	}
 
-	if (optind >= argc)
-		errx(EXIT_FAILURE, "No executable specified");
-
-#define N_FILTERS (ARRAY_SIZE(syscalls) + 3)
-
-	struct sock_filter filter[N_FILTERS] = {
-		[0]             = BPF_STMT(BPF_LD | BPF_W | BPF_ABS, syscall_nr),
-
-		[N_FILTERS - 2] = BPF_STMT(BPF_RET | BPF_K, SECCOMP_RET_ALLOW),
-		[N_FILTERS - 1] = BPF_STMT(BPF_RET | BPF_K, SECCOMP_RET_ERRNO | ENOSYS),
-	};
-
-	const struct sock_filter nop = BPF_JUMP(BPF_JMP | BPF_JA, 0, 0, 0);
-
-	for (i = 0; i < ARRAY_SIZE(syscalls); i++) {
-		if (blocked_syscalls[i]) {
-			const struct sock_filter block = BPF_JUMP(
-					BPF_JMP | BPF_JEQ | BPF_K,
-					syscalls[i].number,
-					N_FILTERS - 3 - i, 0);
-			filter[i + 1] = block;
-		} else {
-			filter[i + 1] = nop;
-		}
+	if (strcmp(argv[1], "fallocate") == 0) {
+		errno = 0;
+		r = fallocate(-1, 0, 0, 0);
+		errx(EXIT_SUCCESS, "fallocate r=%d errno=%s", r, strerror(errno));
+	} else if (strcmp(argv[1], "exec") == 0) {
+		char *const cmd[] = {
+			"/bin/false",
+			NULL
+		};
+		execve(cmd[0], cmd, NULL);
+		err(EXIT_FAILURE, "exec failed");
+	} else if (strcmp(argv[1], "ioctl") == 0) {
+		r = ioctl(0, FIOCLEX);
+		errx(EXIT_SUCCESS, "ioctl r=%d errno=%s", r, strerror(errno));
 	}
 
-	struct sock_fprog prog = {
-		.len    = ARRAY_SIZE(filter),
-		.filter = filter,
-	};
-
-	if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0))
-		err(EXIT_NOTSUPP, "prctl(PR_SET_NO_NEW_PRIVS)");
-
-	if (prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog))
-		err(EXIT_NOTSUPP, "prctl(PR_SET_SECCOMP)");
-
-	if (execvp(argv[optind], argv + optind))
-		err(EXIT_NOTSUPP, "Could not exec");
+	errx(EXIT_FAILURE, "invalid mode %s", argv[1]);
 }