1 /*- 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Mike Karels at Berkeley Software Design, Inc. 7 * 8 * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD 9 * project, to make these variables more userfriendly. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94 40 * $FreeBSD: src/sys/kern/kern_mib.c,v 1.29.2.4 2001/07/30 23:28:00 peter Exp $ 41 * $DragonFly: src/sys/kern/kern_mib.c,v 1.16 2008/01/04 12:16:19 matthias Exp $ 42 */ 43 44 #include <sys/param.h> 45 #include <sys/kernel.h> 46 #include <sys/systm.h> 47 #include <sys/sysctl.h> 48 #include <sys/proc.h> 49 #include <sys/lockf.h> 50 #include <sys/jail.h> 51 #include <machine/smp.h> 52 53 SYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0, 54 "Sysctl internal magic"); 55 SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0, 56 "High kernel, proc, limits &c"); 57 SYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0, 58 "Virtual memory"); 59 SYSCTL_NODE(, CTL_VFS, vfs, CTLFLAG_RW, 0, 60 "File system"); 61 SYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0, 62 "Network, (see socket.h)"); 63 SYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0, 64 "Debugging"); 65 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 66 "Size of various kernel data structures"); 67 SYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0, 68 "hardware"); 69 SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 70 "machine dependent"); 71 SYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0, 72 "user-level"); 73 SYSCTL_NODE(, CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 74 "p1003_1b, (see p1003_1b.h)"); 75 SYSCTL_NODE(, CTL_LWKT, lwkt, CTLFLAG_RW, 0, 76 "light weight kernel threads"); 77 78 SYSCTL_NODE(, OID_AUTO, compat, CTLFLAG_RW, 0, 79 "Compatibility code"); 80 SYSCTL_NODE(, OID_AUTO, security, CTLFLAG_RW, 0, 81 "Security"); 82 83 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD, 84 kern_ident, 0, "Kernel identifier"); 85 86 SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD, 87 osrelease, 0, "Operating system type"); 88 89 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD, 90 0, BSD, "Operating system revision"); 91 92 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD, 93 version, 0, "Kernel version"); 94 95 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD, 96 ostype, 0, "Operating system type"); 97 98 extern int osreldate; 99 SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD, 100 &osreldate, 0, "Operating system release date"); 101 102 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD, 103 &maxproc, 0, "Maximum number of processes"); 104 105 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 106 &maxprocperuid, 0, "Maximum processes allowed per userid"); 107 108 SYSCTL_INT(_kern, KERN_MAXPOSIXLOCKSPERUID, maxposixlocksperuid, CTLFLAG_RW, 109 &maxposixlocksperuid, 0, "Maximum number of POSIX-type locks per user id"); 110 111 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RD, 112 &maxusers, 0, "Hint for kernel tuning"); 113 114 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD, 115 0, ARG_MAX, "Maximum bytes of argument to execve(2)"); 116 117 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD, 118 0, _KPOSIX_VERSION, "Version of POSIX attempting to comply to"); 119 120 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD, 121 0, NGROUPS_MAX, "Maximum number of groups a user can belong to"); 122 123 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD, 124 0, 1, "Whether job control is available"); 125 126 #ifdef _POSIX_SAVED_IDS 127 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 128 0, 1, "Whether saved set-group/user ID is available"); 129 #else 130 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 131 0, 0, "Whether saved set-group/user ID is available"); 132 #endif 133 134 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 135 136 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW, 137 kernelname, sizeof kernelname, "Name of kernel file booted"); 138 139 #ifdef SMP 140 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, 141 &ncpus, 0, "Number of active CPUs"); 142 #else 143 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, 144 0, 1, "Number of active CPUs"); 145 #endif 146 147 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD, 148 0, BYTE_ORDER, "System byte order"); 149 150 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD, 151 0, PAGE_SIZE, "System memory page size"); 152 153 static char platform[] = MACHINE_PLATFORM; 154 SYSCTL_STRING(_hw, HW_MACHINE_PLATFORM, platform, CTLFLAG_RD, 155 platform, 0, "Platform architecture"); 156 157 static char machine_arch[] = MACHINE_ARCH; 158 SYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD, 159 machine_arch, 0, "Cpu architecture"); 160 161 char hostname[MAXHOSTNAMELEN]; 162 163 static int 164 sysctl_hostname(SYSCTL_HANDLER_ARGS) 165 { 166 struct thread *td = req->td; 167 struct proc *p = td ? td->td_proc : NULL; 168 int error; 169 170 if (p && p->p_ucred->cr_prison) { 171 if (!jail_set_hostname_allowed && req->newptr) 172 return(EPERM); 173 error = sysctl_handle_string(oidp, 174 p->p_ucred->cr_prison->pr_host, 175 sizeof p->p_ucred->cr_prison->pr_host, req); 176 } else { 177 error = sysctl_handle_string(oidp, 178 hostname, sizeof hostname, req); 179 } 180 return (error); 181 } 182 183 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 184 CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_PRISON, 185 0, 0, sysctl_hostname, "A", "Hostname"); 186 187 int securelevel = -1; 188 int kernel_mem_readonly = 0; 189 190 static int 191 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 192 { 193 int error, level; 194 195 level = securelevel; 196 error = sysctl_handle_int(oidp, &level, 0, req); 197 if (error || !req->newptr) 198 return (error); 199 if (level < securelevel) 200 return (EPERM); 201 securelevel = level; 202 return (error); 203 } 204 205 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, CTLTYPE_INT|CTLFLAG_RW, 206 0, 0, sysctl_kern_securelvl, "I", "Current secure level"); 207 208 char domainname[MAXHOSTNAMELEN]; 209 SYSCTL_STRING(_kern, KERN_NISDOMAINNAME, domainname, CTLFLAG_RW, 210 &domainname, sizeof(domainname), "Name of the current YP/NIS domain"); 211 212 unsigned long hostid; 213 SYSCTL_ULONG(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "Host ID"); 214 215 /* 216 * This is really cheating. These actually live in the libc, something 217 * which I'm not quite sure is a good idea anyway, but in order for 218 * getnext and friends to actually work, we define dummies here. 219 */ 220 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 221 "", 0, "PATH that finds all the standard utilities"); 222 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 223 0, 0, "Max ibase/obase values in bc(1)"); 224 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 225 0, 0, "Max array size in bc(1)"); 226 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 227 0, 0, "Max scale value in bc(1)"); 228 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 229 0, 0, "Max string length in bc(1)"); 230 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 231 0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 232 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, ""); 233 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 234 0, 0, "Max length (bytes) of a text-processing utility's input line"); 235 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 236 0, 0, "Maximum number of repeats of a regexp permitted"); 237 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 238 0, 0, 239 "The version of POSIX 1003.2 with which the system attempts to comply"); 240 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 241 0, 0, "Whether C development supports the C bindings option"); 242 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 243 0, 0, "Whether system supports the C development utilities option"); 244 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 245 0, 0, ""); 246 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 247 0, 0, "Whether system supports FORTRAN development utilities"); 248 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 249 0, 0, "Whether system supports FORTRAN runtime utilities"); 250 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 251 0, 0, "Whether system supports creation of locales"); 252 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 253 0, 0, "Whether system supports software development utilities"); 254 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 255 0, 0, "Whether system supports the user portability utilities"); 256 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 257 0, 0, "Min Maximum number of streams a process may have open at one time"); 258 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 259 0, 0, "Min Maximum number of types supported for timezone names"); 260 261 #include <sys/vnode.h> 262 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 263 0, sizeof(struct vnode), "sizeof(struct vnode)"); 264 265 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 266 0, sizeof(struct proc), "sizeof(struct proc)"); 267 268 #include <sys/conf.h> 269 SYSCTL_INT(_debug_sizeof, OID_AUTO, cdev, CTLFLAG_RD, 270 0, sizeof(struct cdev), "sizeof(struct cdev)"); 271