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Implemented ftruncate() with its special access checking

N2009_11_14_FIXES
jpandre 2007-11-12 13:33:40 +00:00
parent efe1ffec7a
commit eb0713793e
1 changed files with 23 additions and 2 deletions
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25
src/ntfs-3g.c
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@ -760,7 +760,11 @@ out:
return res;
}
static int ntfs_fuse_truncate(const char *org_path, off_t size)
/*
* Common part for truncate() and ftruncate()
*/
static int ntfs_fuse_trunc(const char *org_path, off_t size, BOOL chkwrite)
{
ntfs_volume *vol;
ntfs_inode *ni = NULL;
@ -788,7 +792,8 @@ static int ntfs_fuse_truncate(const char *org_path, off_t size)
*/
if (ntfs_fuse_fill_security_context(&security)
&& (!ntfs_allowed_dir_access(&security, path, S_IEXEC)
|| !ntfs_allowed_access(&security, path, ni, S_IWRITE))) {
|| (chkwrite
&& !ntfs_allowed_access(&security, path, ni, S_IWRITE)))) {
errno = EACCES;
ntfs_attr_close(na);
goto exit;
@ -811,6 +816,21 @@ exit:
return res;
}
static int ntfs_fuse_truncate(const char *org_path, off_t size)
{
return (ntfs_fuse_trunc(org_path, size, TRUE));
}
static int ntfs_fuse_ftruncate(const char *org_path, off_t size,
struct fuse_file_info *fi)
{
/*
* in ->ftruncate() the file handle is guaranteed
* to have been opened for write.
*/
return (ntfs_fuse_trunc(org_path, size, FALSE));
}
static int ntfs_fuse_chmod(const char *path,
mode_t mode)
{
@ -1876,6 +1896,7 @@ static struct fuse_operations ntfs_3g_ops = {
.read = ntfs_fuse_read,
.write = ntfs_fuse_write,
.truncate = ntfs_fuse_truncate,
.ftruncate = ntfs_fuse_ftruncate,
.statfs = ntfs_fuse_statfs,
.chmod = ntfs_fuse_chmod,
.chown = ntfs_fuse_chown,