1 /* $OpenBSD: db_usrreq.c,v 1.4 2000/02/27 04:57:29 hugh Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Michael Shalayeff. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Michael Shalayeff. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/types.h> 34 #include <sys/kernel.h> 35 #include <sys/proc.h> 36 #include <vm/vm.h> 37 #include <sys/sysctl.h> 38 39 #include <ddb/db_var.h> 40 41 extern int securelevel; 42 43 int 44 ddb_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 45 int *name; 46 u_int namelen; 47 void *oldp; 48 size_t *oldlenp; 49 void *newp; 50 size_t newlen; 51 struct proc *p; 52 { 53 int error, ctlval; 54 55 /* All sysctl names at this level are terminal. */ 56 if (namelen != 1) 57 return (ENOTDIR); 58 59 switch (name[0]) { 60 61 case DBCTL_RADIX: 62 return sysctl_int(oldp, oldlenp, newp, newlen, &db_radix); 63 case DBCTL_MAXWIDTH: 64 return sysctl_int(oldp, oldlenp, newp, newlen, &db_max_width); 65 case DBCTL_TABSTOP: 66 return sysctl_int(oldp, oldlenp, newp, newlen, &db_tab_stop_width); 67 case DBCTL_MAXLINE: 68 return sysctl_int(oldp, oldlenp, newp, newlen, &db_max_line); 69 case DBCTL_PANIC: 70 ctlval = db_panic; 71 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &ctlval)) || 72 newp == NULL) 73 return (error); 74 if (ctlval != 1 && ctlval != 0) 75 return (EINVAL); 76 if (ctlval > db_panic && securelevel > 1) 77 return (EPERM); 78 db_panic = ctlval; 79 return (0); 80 case DBCTL_CONSOLE: 81 ctlval = db_console; 82 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &ctlval)) || 83 newp == NULL) 84 return (error); 85 if (ctlval != 1 && ctlval != 0) 86 return (EINVAL); 87 if (ctlval > db_console && securelevel > 1) 88 return (EPERM); 89 db_console = ctlval; 90 return (0); 91 default: 92 return (EOPNOTSUPP); 93 } 94 /* NOTREACHED */ 95 } 96