1 files changed, 134 insertions, 0 deletions
diff --git a/fpart/src/cmd_trunc.c b/fpart/src/cmd_trunc.c
new file mode 100644
index 0000000..b946bdc
--- /dev/null
+++ b/fpart/src/cmd_trunc.c
@@ -0,0 +1,134 @@
+/*
+ *   Copyright (c) International Business Machines Corp., 2012
+ *
+ *   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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/*
+ *    File: trunc.c
+ *  Author: Shaun Wetzstein <shaun@us.ibm.com>
+ *   Descr: --trunc implementation
+ *    Date: 01/30/2013
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <fcntl.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <errno.h>
+#include <ctype.h>
+#include <regex.h>
+
+#include <clib/assert.h>
+#include <clib/list.h>
+#include <clib/list_iter.h>
+#include <clib/misc.h>
+#include <clib/min.h>
+#include <clib/err.h>
+#include <clib/raii.h>
+
+#include "main.h"
+
+int command_trunc(args_t * args)
+{
+	assert(args != NULL);
+
+	char name[strlen(args->name) + 2];
+	strcpy(name, args->name);
+	if (strrchr(name, '$') == NULL)
+		strcat(name, "$");
+
+	off_t __poffset;
+	ffs_t * __ffs;
+
+	char full_name[page_size];
+	regex_t rx;
+
+	/* ========================= */
+
+	int trunc_entry(ffs_entry_t * entry)
+	{
+                if (__ffs_entry_name(__ffs, entry, full_name,
+				     sizeof full_name) < 0)
+			return -1;
+
+		if (regexec(&rx, full_name, 0, NULL, 0) == REG_NOMATCH)
+			return 0;
+
+		if (entry->flags & FFS_FLAGS_PROTECTED &&
+		    args->force != f_FORCE) {
+			printf("%llx: %s: protected, skipping truncate\n",
+			       __poffset, full_name);
+			return 0;
+		}
+
+		size_t size = entry->size * __ffs->hdr->block_size;
+		if (args->size != NULL)
+			if (parse_size(args->size, &size) < 0)
+				return -1;
+
+		if (__ffs_entry_truncate(__ffs, full_name, size) < 0)
+			return -1;
+
+		if (args->verbose == f_VERBOSE)
+			printf("%llx: %s: truncate size '%x'\n", __poffset,
+			       full_name, size);
+
+		return 0;
+	}
+
+	int trunc(args_t * args, off_t poffset)
+	{
+		__poffset = poffset;
+
+		const char * target = args->target;
+		int debug = args->debug;
+
+		RAII(FILE*, file, fopen_generic(target, "r+", debug), fclose);
+		if (file == NULL)
+			return -1;
+		RAII(ffs_t*, ffs, __ffs_fopen(file, poffset), __ffs_fclose);
+		if (ffs == NULL)
+			return -1;
+
+		__ffs = ffs;
+
+		int rc = __ffs_iterate_entries(ffs, trunc_entry);
+		if (rc == 1)
+			return -1;
+
+		return rc;
+	}
+
+	/* ========================= */
+
+	if (regcomp(&rx, name, REG_ICASE | REG_NOSUB) != 0) {
+		ERRNO(errno);
+		return -1;
+	}
+
+	int rc = command(args, trunc);
+
+	regfree(&rx);
+
+	return rc;
+}