//go:build unix && !sqlite3_nosys package vfs import ( "os" "syscall" "golang.org/x/sys/unix" ) const _O_NOFOLLOW = unix.O_NOFOLLOW func osAccess(path string, flags AccessFlag) error { var access uint32 // unix.F_OK switch flags { case ACCESS_READWRITE: access = unix.R_OK | unix.W_OK case ACCESS_READ: access = unix.R_OK } return unix.Access(path, access) } func osSetMode(file *os.File, modeof string) error { fi, err := os.Stat(modeof) if err != nil { return err } file.Chmod(fi.Mode()) if sys, ok := fi.Sys().(*syscall.Stat_t); ok { file.Chown(int(sys.Uid), int(sys.Gid)) } return nil } func osTestLock(file *os.File, start, len int64) (int16, _ErrorCode) { lock := unix.Flock_t{ Type: unix.F_WRLCK, Start: start, Len: len, } if unix.FcntlFlock(file.Fd(), unix.F_GETLK, &lock) != nil { return 0, _IOERR_CHECKRESERVEDLOCK } return lock.Type, _OK } func osLockErrorCode(err error, def _ErrorCode) _ErrorCode { if err == nil { return _OK } if errno, ok := err.(unix.Errno); ok { switch errno { case unix.EACCES, unix.EAGAIN, unix.EBUSY, unix.EINTR, unix.ENOLCK, unix.EDEADLK, unix.ETIMEDOUT: return _BUSY case unix.EPERM: return _PERM } // notest // usually EWOULDBLOCK == EAGAIN if errno == unix.EWOULDBLOCK && unix.EWOULDBLOCK != unix.EAGAIN { return _BUSY } } return def }