Differential D8290 Diff 22216 usr.sbin/bhyve/uart_emul.c

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usr.sbin/bhyve/uart_emul.c

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* $FreeBSD$		* $FreeBSD$
*/		*/

#include <sys/cdefs.h>		#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");		__FBSDID("$FreeBSD$");

#include <sys/types.h>		#include <sys/types.h>
#include <dev/ic/ns16550.h>		#include <dev/ic/ns16550.h>
		#ifndef WITHOUT_CAPSICUM
		#include <sys/capsicum.h>
		#include <capsicum_helpers.h>
		#endif

#include <stdio.h>		#include <stdio.h>
#include <stdlib.h>		#include <stdlib.h>
#include <assert.h>		#include <assert.h>
		#include <err.h>
		#include <errno.h>
#include <fcntl.h>		#include <fcntl.h>
#include <termios.h>		#include <termios.h>
#include <unistd.h>		#include <unistd.h>
#include <stdbool.h>		#include <stdbool.h>
#include <string.h>		#include <string.h>
#include <pthread.h>		#include <pthread.h>
		#include <sysexits.h>

#include "mevent.h"		#include "mevent.h"
#include "uart_emul.h"		#include "uart_emul.h"

#define COM1_BASE 0x3F8		#define COM1_BASE 0x3F8
#define COM1_IRQ 4		#define COM1_IRQ 4
#define COM2_BASE 0x2F8		#define COM2_BASE 0x2F8
#define COM2_IRQ 3		#define COM2_IRQ 3
▲ Show 20 Lines • Show All 580 Lines • ▼ Show 20 Lines	uart_tty_backend(struct uart_softc sc, const char opts)
retval = -1;		retval = -1;

fd = open(opts, O_RDWR \| O_NONBLOCK);		fd = open(opts, O_RDWR \| O_NONBLOCK);
if (fd > 0 && isatty(fd)) {		if (fd > 0 && isatty(fd)) {
sc->tty.fd = fd;		sc->tty.fd = fd;
sc->tty.opened = true;		sc->tty.opened = true;
retval = 0;		retval = 0;
}		}

return (retval);		return (retval);
}		}

int		int
uart_set_backend(struct uart_softc sc, const char opts)		uart_set_backend(struct uart_softc sc, const char opts)
{		{
int retval;		int retval;
		#ifndef WITHOUT_CAPSICUM
		cap_rights_t rights;
		u_long cmds[] = {TIOCGETA, TIOCSETA, TIOCGWINSZ};
		#endif

retval = -1;		retval = -1;

if (opts == NULL)		if (opts == NULL)
return (0);		return (0);

if (strcmp("stdio", opts) == 0) {		if (strcmp("stdio", opts) == 0) {
if (!uart_stdio) {		if (!uart_stdio) {
sc->tty.fd = STDIN_FILENO;		sc->tty.fd = STDIN_FILENO;
sc->tty.opened = true;		sc->tty.opened = true;
uart_stdio = true;		uart_stdio = true;
retval = 0;		retval = 0;
}		}
} else if (uart_tty_backend(sc, opts) == 0) {		} else if (uart_tty_backend(sc, opts) == 0) {
retval = 0;		retval = 0;
}		}

/* Make the backend file descriptor non-blocking */		/* Make the backend file descriptor non-blocking */
if (retval == 0)		if (retval == 0)
retval = fcntl(sc->tty.fd, F_SETFL, O_NONBLOCK);		retval = fcntl(sc->tty.fd, F_SETFL, O_NONBLOCK);

		#ifndef WITHOUT_CAPSICUM
		cap_rights_init(&rights, CAP_READ, CAP_WRITE, CAP_IOCTL, CAP_EVENT);
		if (cap_rights_limit(sc->tty.fd, &rights) == -1 && errno != ENOSYS)
		errx(EX_OSERR, "Unable to apply rights for sandbox");
		if (cap_ioctls_limit(sc->tty.fd, cmds, nitems(cmds)) == -1 && errno != ENOSYS)
		errx(EX_OSERR, "Unable to apply rights for sandbox");
		if (!uart_stdio) {
		if (caph_limit_stdin() == -1 && errno != ENOSYS)
		errx(EX_OSERR, "Unable to apply rights for sandbox");
		}
		#endif

if (retval == 0)		if (retval == 0)
uart_opentty(sc);		uart_opentty(sc);

return (retval);		return (retval);
}		}