Adding upstream version 2:2.6.1.upstream/2%2.6.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 166 insertions, 0 deletions

diff --git a/tests/differ.c b/tests/differ.c
new file mode 100644
index 0000000..95da8e5
--- /dev/null
+++ b/tests/differ.c
@@ -0,0 +1,166 @@
+/*
+ * cryptsetup file differ check (rewritten Clemens' fileDiffer in Python)
+ *
+ * Copyright (C) 2010-2023 Red Hat, Inc. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+struct ffile {
+	char *name;
+	int fd;
+	unsigned char *addr;
+	size_t size;
+};
+
+enum df { OK , FAIL };
+
+static void print_diff(off_t from, int max,
+		       const unsigned char *o,
+		       const unsigned char *n)
+{
+	int i, len = max;
+
+	if (len > 16)
+		len = 16;
+
+	printf("OLD:");
+	for (i = 0; i < len; i++)
+		printf(" %02x", o[from + i]);
+	printf("%s\n    ", max != len ? " ..." : "");
+	for (i = 0; i < len; i++)
+		printf(" %2c", o[from + i] > ' ' ? o[from + i]: '.');
+	printf("\nNEW:");
+	for (i = 0; i < len; i++)
+		printf(" %02x", n[from + i]);
+	printf("%s\n    ", max != len ? " ..." : "");
+	for (i = 0; i < len; i++)
+		printf(" %2c", n[from + i] > ' ' ? n[from + i]: '.');
+	printf("\n");
+}
+
+/*
+ * Xfrom-to (e.g. R10-15)
+ * A - change allowed
+ * S - change required, semantic
+ * R - change required, random
+ * F - change forbidden
+ */
+static enum df check(const char *range, unsigned char *o, unsigned char *n)
+{
+	char strict;
+	unsigned long long from, to;
+	enum df ret;
+
+	if (sscanf(range, "%c%llu-%llu", &strict, &from, &to) != 3) {
+		printf("Unknown range format %s.\n", range);
+		return FAIL;
+	}
+
+	switch (toupper(strict)) {
+	case 'A':
+		ret = OK;
+		break;
+	case 'S':
+		ret = memcmp(&o[from], &n[from], to - from + 1) != 0 ? OK : FAIL;
+		break;
+	case 'R': /* FIXME - random test */
+		ret = memcmp(&o[from], &n[from], to - from + 1) != 0 ? OK : FAIL;
+		break;
+	case 'F':
+		ret = memcmp(&o[from], &n[from], to - from + 1) == 0 ? OK : FAIL;
+		break;
+	default:
+		ret = FAIL;
+		break;
+	}
+
+	if (ret == FAIL)
+		print_diff(from,  to - from + 1, o, n);
+
+	return ret;
+}
+
+static int open_mmap(struct ffile *f)
+{
+	struct stat st;
+
+	f->fd = open(f->name, O_RDONLY);
+	if (f->fd == -1 || fstat(f->fd, &st) == -1)
+		return 0;
+
+	f->size = st.st_size;
+	f->addr = mmap(NULL, f->size, PROT_READ, MAP_PRIVATE, f->fd, 0);
+
+	return (f->addr == MAP_FAILED) ? 0 : 1;
+}
+
+static void close_mmap(struct ffile *f)
+{
+	if (f->addr != MAP_FAILED && !munmap(f->addr, f->size))
+		f->addr = MAP_FAILED;
+
+	if (f->fd != -1 && !close(f->fd))
+		f->fd = -1;
+}
+
+int main(int argc, char *argv[])
+{
+	int i, r = 1;
+	struct ffile file_old = {
+		.fd = -1,
+		.addr = MAP_FAILED,
+	};
+	struct ffile file_new = {
+		.fd = -1,
+		.addr = MAP_FAILED,
+	};
+
+	if (argc < 3) {
+		printf("Use: differ old_file new_file change_list.\n");
+		goto bad;
+	}
+
+	file_old.name = argv[1];
+	if (!open_mmap(&file_old))
+		goto bad;
+
+	file_new.name = argv[2];
+	if (!open_mmap(&file_new))
+		goto bad;
+
+	for (i = 3; i < argc; i++)
+		if (check(argv[i], file_old.addr, file_new.addr) == FAIL) {
+			printf ("FAILED for %s\n", argv[i]);
+			r = 1;
+			goto bad;
+		}
+
+	r = 0;
+bad:
+	close_mmap(&file_new);
+	close_mmap(&file_old);
+
+	return r;
+}