gnunet-fuse

commit 90989f282e9fa2d866783daa04730d235b8e6aea
parent 7af3b5fb8574b3fe7b7d138458b13c9501d21b93
Author: David Barksdale <amatus.amongus@gmail.com>
Date:   Thu, 19 Jul 2007 05:02:53 +0000

Added file truncation support

Diffstat:
M
Makefile.am
 | 
1
+
M
getattr.c
 | 
2
+-
M
gnfs.h
 | 
1
+
M
main.c
 | 
1
+
A
truncate.c
 | 
84
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

5 files changed, 88 insertions(+), 1 deletion(-)
diff --git a/Makefile.am b/Makefile.am
@@ -13,6 +13,7 @@ gnunet_fs_SOURCES = \
 	rename.c \
 	rmdir.c \
 	special_file.c \
+	truncate.c \
 	unlink.c \
 	utimens.c \
 	write.c \
diff --git a/getattr.c b/getattr.c
@@ -60,7 +60,7 @@ int gn_getattr(const char *path, struct stat *stbuf)
 	}
 	if(de->de_cached && de->de_type == DE_FILE)
 	{
-		ret = stat(path, stbuf);
+		ret = stat(de->de_filename, stbuf);
 		if(ret == -1)
 		{
 			ret = -errno;
diff --git a/gnfs.h b/gnfs.h
@@ -119,6 +119,7 @@ int gn_mkdir(const char *path, mode_t mode);
 int gn_unlink(const char *path);
 int gn_rmdir(const char *path);
 int gn_rename(const char *from, const char *to);
+int gn_truncate(const char *path, off_t size);
 int gn_utimens(const char *path, const struct timespec ts[2]);
 int gn_open(const char *path, struct fuse_file_info *fi);
 int gn_read(const char *path, char *buf, size_t size, off_t offset,
diff --git a/main.c b/main.c
@@ -78,6 +78,7 @@ static struct fuse_operations fops =
 	.unlink = gn_unlink,
 	.rmdir = gn_rmdir,
 	.rename = gn_rename,
+	.truncate = gn_truncate,
 	.utimens = gn_utimens,
 	.open = gn_open,
 	.read = gn_read,
diff --git a/truncate.c b/truncate.c
@@ -0,0 +1,84 @@
+/*
+ * truncate.c - FUSE truncate function
+ *
+ * This file is part of gnunet-fuse.
+ * Copyright (C) 2007 David Barksdale
+ *
+ * gnunet-fuse is free software; you can redistribute it and/or
+ * modify if under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * gnunet-fuse 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
+ */
+
+#include <errno.h>
+#include <unistd.h>
+#include <fuse.h>
+#include "gnfs.h"
+
+int gn_truncate(const char *path, off_t size)
+{
+	struct dirent *de;
+	int ret = 0;
+
+	GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG,
+		"%s: called for '%s' %lld bytes\n", __FUNCTION__, path, size);
+
+	/* Check for special file */
+	if(gn_exists_special_file(path))
+		return -EACCES;
+
+	/* Lookup dirent for path */
+	de = gn_dirent_find(path);
+	if(de == NULL)
+	{
+		GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG,
+			"%s: file not found\n", __FUNCTION__);
+		return -ENOENT;
+	}
+	if(de->de_type != DE_FILE)
+	{
+		GE_LOG(ectx, GE_BULK | GE_DEVELOPER | GE_DEBUG,
+			"%s: not a file\n", __FUNCTION__);
+		ret = -EISDIR;
+		goto out;
+	}
+
+	/* We must be cached */
+	if(SEMAPHORE_DOWN(de->de_sema, YES) == SYSERR)
+	{
+		ret = -EIO;
+		goto out;
+	}
+	if(!de->de_cached)
+	{
+		if(gn_dirent_download_locked(de) == -1)
+		{
+			ret = -EIO;
+			goto out_unlock;
+		}
+	}
+
+	/* Perform truncate */
+	ret = ftruncate(de->de_fd, size);
+	if(ret == -1)
+	{
+		ret = -errno;
+		goto out_unlock;
+	}
+
+	/* Mark us dirty */
+	de->de_dirty = 1;
+out_unlock:
+	SEMAPHORE_UP(de->de_sema);
+out:
+	gn_dirent_put(de);
+	return ret;
+}