This patch adds

cbfstool extract [FILE] [NAME]

It also factors out the csize calculation in rom_add, and fixes rom_delete so
that it can handle deleting the last entry.

Signed-off-by: Myles Watson <mylesgw@gmail.com>
Acked-by: Ronald G. Minnich <rminnich@gmail.com>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4144 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

util/cbfstool/extract.c

@@ -0,0 +1,74 @@
+/*
+ * cbfstool
+ *
+ * Copyright (C) 2009 Myles Watson <mylesgw@gmail.com>
+ *
+ * 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; version 2 of the License.
+ *
+ * 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 St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include "cbfstool.h"
+
+static int extract_blob(struct rom *rom, const char *filename, const char *name)
+{
+	void *buf;
+	int fd, ret;
+	unsigned long size;
+
+	ret = rom_extract(rom, name, &buf, &size);
+
+	if (ret == -1) 
+		return -1;
+
+	fd = open(filename, O_RDWR | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
+
+	if (fd == -1) {
+		ERROR("Could not open %s: %m\n", filename);
+		return -1;
+	}
+
+	if (write(fd, buf, size) != size) {
+		ERROR("Couldn't write %ld bytes!\n", size);
+		ret = -1;
+	}
+
+	close(fd);
+
+	return ret;
+}
+
+void extract_usage(void)
+{
+	printf("extract [FILE] [NAME] \textract a component\n");
+}
+
+int extract_handler(struct rom *rom, int argc, char **argv)
+{
+	if (argc < 2) {
+		extract_usage();
+		return -1;
+	}
+
+	if (!rom_exists(rom)) {
+		ERROR("Can't find the ROM!\n");
+		return -1;
+	}
+
+	return extract_blob(rom, argv[0], argv[1]);
+}
+