Add contrib/archivetest.c utility to test archives with libarchive

1 files changed, 137 insertions, 0 deletions

diff --git a/contrib/archivetest.c b/contrib/archivetest.c
new file mode 100644
index 00000000..2d81d3ee
--- /dev/null
+++ b/contrib/archivetest.c
@@ -0,0 +1,137 @@
+/*-
+ * Copyright (c) 2019 Martin Matuska
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This utility tests parsing files by libarchive
+ *
+ * It may be used to reproduce failures in testcases discovered by OSS-Fuzz
+ * https://github.com/google/oss-fuzz/blob/master/projects/libarchive
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <archive.h>
+#include <archive_entry.h>
+
+const char *errnostr(int errno)
+{
+	char *estr;
+	switch(errno) {
+		case ARCHIVE_EOF:
+			estr = "ARCHIVE_EOF";
+		break;
+		case ARCHIVE_OK:
+			estr = "ARCHIVE_OK";
+		break;
+		case ARCHIVE_WARN:
+			estr = "ARCHIVE_WARN";
+		break;
+		case ARCHIVE_RETRY:
+			estr = "ARCHIVE_RETRY";
+		break;
+		case ARCHIVE_FAILED:
+			estr = "ARCHIVE_FAILED";
+		break;
+		case ARCHIVE_FATAL:
+			estr = "ARCHIVE_FATAL";
+		break;
+		default:
+			estr = "Unknown";
+		break;
+	}
+	return (estr);
+}
+
+int main(int argc, char *argv[])
+{
+	struct archive *a;
+	struct archive_entry *entry;
+	char *filename;
+	const char *p;
+	char buffer[4096];
+	int c;
+	int r = ARCHIVE_OK;
+	int format_printed;
+
+	if (argc != 2) {
+		fprintf(stderr, "Usage: %s filename\n", argv[0]);
+		exit(1);
+	}
+
+	filename = argv[1];
+
+	a = archive_read_new();
+
+	archive_read_support_filter_all(a);
+	archive_read_support_format_all(a);
+
+	r = archive_read_open_filename(a, filename, 4096);
+	if (r != ARCHIVE_OK) {
+		archive_read_free(a);
+		fprintf(stderr, "Error opening filename: %s\n", filename);
+		exit(ARCHIVE_FATAL);
+	}
+
+	format_printed = 0;
+	c = 1;
+	while (1) {
+		r = archive_read_next_header(a, &entry);
+		if (r == ARCHIVE_FATAL) {
+			fprintf(stdout,
+			    "Entry %d: fatal error reding header\n", c);
+			break;
+		}
+		if (!format_printed) {
+			fprintf(stdout, "Filter: %s\nFormat: %s\n",
+			    archive_filter_name(a, 0), archive_format_name(a));
+			format_printed = 1;
+		}
+		if (r == ARCHIVE_RETRY)
+			continue;
+		if (r == ARCHIVE_EOF)
+			break;
+		p = archive_entry_pathname(entry);
+		if (p == NULL || p[0] == '\0')
+			fprintf(stdout, "Entry %d: %s, ureadable pathname\n",
+			    c, errnostr(r));
+		else
+			fprintf(stdout, "Entry %d: %s, pathname: %s\n", c,
+			    errnostr(r), p);
+		while ((r = archive_read_data(a, buffer, 4096) > 0))
+		;
+		if (r == ARCHIVE_FATAL) {
+			fprintf(stderr, "Entry %d: fatal error reading data\n",
+			    c);
+			break;
+		}
+		c++;
+	}
+	archive_read_free(a);
+
+	fprintf(stdout, "Last return code: %s (%d)\n", errnostr(r), r);
+	if (r == ARCHIVE_EOF || r == ARCHIVE_OK)
+		exit(0);
+	exit(1);
+}