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Allow the user to suppress the rate-limited pty(4) warning.

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The pty(4) driver raises up to warnings when an old BSD-style PTY is
created. The reason why I added this warning, was to make it easier to
spot applications that allocate BSD-style PTY's, while they should just
use openpty() or posix_openpt().

Add a sysctl, which allows you to override the number of remaining
messages, making it possible to suppress the warnings.

Requested by:	kib
Reviewed by:	kib
This commit is contained in:
Ed Schouten 2008-08-23 16:03:00 +00:00
parent d444cd5f28
commit 1a643b0f02
1 changed files with 5 additions and 1 deletions
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6
sys/kern/tty_pty.c
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@ -36,6 +36,7 @@ __FBSDID("$FreeBSD$");
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/tty.h>
@ -46,7 +47,10 @@ __FBSDID("$FreeBSD$");
* si_drv1 inside the cdev to mark whether the PTY is in use.
*/
static int pty_warningcnt = 10;
static unsigned int pty_warningcnt = 10;
SYSCTL_UINT(_kern, OID_AUTO, tty_pty_warningcnt, CTLFLAG_RW,
&pty_warningcnt, 0,
"Warnings that will be triggered upon PTY allocation");
static int
ptydev_fdopen(struct cdev *dev, int fflags, struct thread *td, struct file *fp)