manifest: new applet which dumps checksums in sha1sum format for a package

src/Makefile

@@ -27,7 +27,7 @@ endif
 progs-y			+= apk
 apk-objs		:= apk.o add.o del.o fix.o update.o info.o \
 			   search.o upgrade.o cache.o ver.o index.o fetch.o \
-			   audit.o verify.o dot.o policy.o stats.o
+			   audit.o verify.o dot.o policy.o stats.o manifest.o
 
 libapk.so-objs		:= common.o database.o package.o archive.o \
 			   version.o io.o url.o gunzip.o blob.o hash.o print.o \

src/manifest.c

@@ -0,0 +1,74 @@
+/* manifest.c - Alpine Package Keeper (APK)
+ *
+ * Copyright (C) 2005-2017 Natanael Copa <n@tanael.org>
+ * Copyright (C) 2008-2017 Timo Teräs <timo.teras@iki.fi>
+ * Copyright (C) 2017 William Pitcock <nenolod@dereferenced.org>
+ * 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 version 2 as published
+ * by the Free Software Foundation. See http://www.gnu.org/ for details.
+ */
+
+#include <stdio.h>
+#include "apk_defines.h"
+#include "apk_applet.h"
+#include "apk_database.h"
+#include "apk_version.h"
+#include "apk_print.h"
+
+/* TODO: support package files as well as generating manifest from the installed DB. */
+
+static void process_package(struct apk_database *db, struct apk_package *pkg)
+{
+	struct apk_installed_package *ipkg = pkg->ipkg;
+	struct apk_db_dir_instance *diri;
+	struct apk_db_file *file;
+	struct hlist_node *dc, *dn, *fc, *fn;
+	char csum_buf[(APK_CHECKSUM_SHA1 * 2) + 1];
+
+	if (ipkg == NULL)
+		return;
+
+	hlist_for_each_entry_safe(diri, dc, dn, &ipkg->owned_dirs,
+				  pkg_dirs_list) {
+		hlist_for_each_entry_safe(file, fc, fn, &diri->owned_files,
+					  diri_files_list) {
+			apk_blob_t csum_blob = APK_BLOB_BUF(csum_buf);
+
+			memset(csum_buf, '\0', sizeof(csum_buf));
+			apk_blob_push_hexdump(&csum_blob, APK_BLOB_CSUM(file->csum));
+
+			if (apk_verbosity > 1)
+				printf("%s: ", pkg->name->name);
+
+                        printf("%s  " DIR_FILE_FMT "\n", csum_buf, DIR_FILE_PRINTF(diri->dir, file));
+                }
+	}
+}
+
+static void process_match(struct apk_database *db, const char *match, struct apk_name *name, void *ctx)
+{
+	struct apk_provider *p;
+
+	if (name == NULL)
+		return;
+
+	foreach_array_item(p, name->providers)
+		process_package(db, p->pkg);
+}
+
+static int manifest_main(void *ctx, struct apk_database *db, struct apk_string_array *args)
+{
+	apk_name_foreach_matching(db, args, apk_foreach_genid(), process_match, NULL);
+	return 0;
+}
+
+static struct apk_applet apk_manifest = {
+        .name = "manifest",
+        .help = "Show checksums of package contents",
+        .open_flags = APK_OPENF_READ,
+        .main = manifest_main,
+};
+
+APK_DEFINE_APPLET(apk_manifest);