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

diff --git a/contrib/archivetest.c b/contrib/archivetest.c
new file mode 100644 (file)
index 0000000..2d81d3e
--- /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);
+}