diff options
Diffstat (limited to 'pkg/sentry/syscalls')
| -rw-r--r-- | pkg/sentry/syscalls/linux/sys_file.go | 34 |
1 files changed, 19 insertions, 15 deletions
diff --git a/pkg/sentry/syscalls/linux/sys_file.go b/pkg/sentry/syscalls/linux/sys_file.go index a2db9d4c9..e2980842f 100644 --- a/pkg/sentry/syscalls/linux/sys_file.go +++ b/pkg/sentry/syscalls/linux/sys_file.go @@ -147,21 +147,25 @@ func openAt(t *kernel.Task, dirFD kdefs.FD, addr usermem.Addr, flags uint) (fd u } fileFlags := linuxToFlags(flags) - isDir := fs.IsDir(d.Inode.StableAttr) - - // If O_DIRECTORY is set, but the file is not a directory, then fail. - if fileFlags.Directory && !isDir { - return syserror.ENOTDIR - } - - // If it's a directory, then make sure. - if dirPath && !isDir { - return syserror.ENOTDIR - } - - // Don't allow directories to be opened writable. - if isDir && fileFlags.Write { - return syserror.EISDIR + if fs.IsDir(d.Inode.StableAttr) { + // Don't allow directories to be opened writable. + if fileFlags.Write { + return syserror.EISDIR + } + } else { + // If O_DIRECTORY is set, but the file is not a directory, then fail. + if fileFlags.Directory { + return syserror.ENOTDIR + } + // If it's a directory, then make sure. + if dirPath { + return syserror.ENOTDIR + } + if fileFlags.Write && flags&syscall.O_TRUNC != 0 { + if err := d.Inode.Truncate(t, d, 0); err != nil { + return err + } + } } file, err := d.Inode.GetFile(t, d, fileFlags) |