From 6ec9d60403fdf7a33072eaa023e62bfd56ed9f5c Mon Sep 17 00:00:00 2001 From: Andrei Vagin Date: Fri, 12 Jun 2020 11:56:43 -0700 Subject: vfs2: implement fcntl(fd, F_SETFL, flags) PiperOrigin-RevId: 316148074 --- pkg/sentry/kernel/fd_table.go | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'pkg/sentry/kernel') diff --git a/pkg/sentry/kernel/fd_table.go b/pkg/sentry/kernel/fd_table.go index b35afafe3..48911240f 100644 --- a/pkg/sentry/kernel/fd_table.go +++ b/pkg/sentry/kernel/fd_table.go @@ -458,6 +458,29 @@ func (f *FDTable) SetFlags(fd int32, flags FDFlags) error { return nil } +// SetFlagsVFS2 sets the flags for the given file descriptor. +// +// True is returned iff flags were changed. +func (f *FDTable) SetFlagsVFS2(fd int32, flags FDFlags) error { + if fd < 0 { + // Don't accept negative FDs. + return syscall.EBADF + } + + f.mu.Lock() + defer f.mu.Unlock() + + file, _, _ := f.getVFS2(fd) + if file == nil { + // No file found. + return syscall.EBADF + } + + // Update the flags. + f.setVFS2(fd, file, flags) + return nil +} + // Get returns a reference to the file and the flags for the FD or nil if no // file is defined for the given fd. // -- cgit v1.2.3