IABSD.fr/src/sys/ddb/db_usrreq.c

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• Author : deraadt
  Date : 2017-09-08 05:36:51
  Hash : b27348b2
  Message : If you use sys/param.h, you don't need sys/types.h

• sys/ddb/db_usrreq.c

• /*	$OpenBSD: db_usrreq.c,v 1.20 2017/09/08 05:36:52 deraadt Exp $	*/
  
  /*
   * Copyright (c) 1996 Michael Shalayeff.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <sys/param.h>
  #include <sys/systm.h>
  #include <sys/proc.h>
  #include <sys/tty.h>
  #include <sys/sysctl.h>
  #include <dev/cons.h>
  
  #include <ddb/db_var.h>
  
  int	db_log = 1;
  int	db_profile;			/* Allow dynamic profiling */
  
  int
  ddb_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
      size_t newlen, struct proc *p)
  {
  	int error, ctlval;
  
  	/* All sysctl names at this level are terminal. */
  	if (namelen != 1)
  		return (ENOTDIR);
  
  	switch (name[0]) {
  
  	case DBCTL_RADIX:
  		return sysctl_int(oldp, oldlenp, newp, newlen, &db_radix);
  	case DBCTL_MAXWIDTH:
  		return sysctl_int(oldp, oldlenp, newp, newlen, &db_max_width);
  	case DBCTL_TABSTOP:
  		return sysctl_int(oldp, oldlenp, newp, newlen, &db_tab_stop_width);
  	case DBCTL_MAXLINE:
  		return sysctl_int(oldp, oldlenp, newp, newlen, &db_max_line);
  	case DBCTL_PANIC:
  		if (securelevel > 0)
  			return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
  			    &db_panic));
  		else {
  			ctlval = db_panic;
  			if ((error = sysctl_int(oldp, oldlenp, newp, newlen,
  			    &ctlval)) || newp == NULL)
  				return (error);
  			if (ctlval != 1 && ctlval != 0)
  				return (EINVAL);
  			db_panic = ctlval;
  			return (0);
  		}
  		break;
  	case DBCTL_CONSOLE:
  		if (securelevel > 0)
  			return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
  			    &db_console));
  		else {
  			ctlval = db_console;
  			if ((error = sysctl_int(oldp, oldlenp, newp, newlen,
  			    &ctlval)) || newp == NULL)
  				return (error);
  			if (ctlval != 1 && ctlval != 0)
  				return (EINVAL);
  			db_console = ctlval;
  			return (0);
  		}
  		break;
  	case DBCTL_LOG:
  		return (sysctl_int(oldp, oldlenp, newp, newlen, &db_log));
  	case DBCTL_TRIGGER:
  		if (newp && db_console) {
  			struct process *pr = curproc->p_p;
  
  			if (securelevel < 1 ||
  			    (pr->ps_flags & PS_CONTROLT && cn_tab &&
  			    cn_tab->cn_dev == pr->ps_session->s_ttyp->t_dev)) {
  				db_enter();
  				newp = NULL;
  			} else
  				return (ENODEV);
  		}
  		return (sysctl_rdint(oldp, oldlenp, newp, 0));
  #if defined(DDBPROF)
  	case DBCTL_PROFILE:
  		if (securelevel > 0)
  			return (sysctl_int_lower(oldp, oldlenp, newp, newlen,
  			    &db_profile));
  		else {
  			ctlval = db_profile;
  			if ((error = sysctl_int(oldp, oldlenp, newp, newlen,
  			    &ctlval)) || newp == NULL)
  				return (error);
  			if (ctlval != 1 && ctlval != 0)
  				return (EINVAL);
  			db_profile = ctlval;
  			return (0);
  		}
  		break;
  #endif /* DDBPROF */
  	default:
  		return (EOPNOTSUPP);
  	}
  	/* NOTREACHED */
  }