getty: more correct check for O_RDWR

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2011-01-22 17:29:53 +01:00
parent 2b57b6cd43
commit 006416e8fe

View File

@ -268,7 +268,7 @@ static void open_tty(const char *tty)
* Standard input should already be connected to an open port. Make
* sure it is open for read/write.
*/
if ((fcntl(0, F_GETFL) & O_RDWR) != O_RDWR)
if ((fcntl(0, F_GETFL) & (O_RDWR|O_RDONLY|O_WRONLY)) != O_RDWR)
bb_error_msg_and_die("stdin is not open for read/write");
}
}