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 * $FreeBSD$ 41 */ 42 43 #include <sys/param.h> 44 #include <sys/kernel.h> 45 #include <sys/systm.h> 46 #include <sys/sysctl.h> 47 #include <sys/proc.h> 48 #include <sys/jail.h> 49 #include <machine/smp.h> 50 51 SYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0, 52 "Sysctl internal magic"); 53 SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0, 54 "High kernel, proc, limits &c"); 55 SYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0, 56 "Virtual memory"); 57 SYSCTL_NODE(, CTL_VFS, vfs, CTLFLAG_RW, 0, 58 "File system"); 59 SYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0, 60 "Network, (see socket.h)"); 61 SYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0, 62 "Debugging"); 63 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 64 "Sizeof various things"); 65 SYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0, 66 "hardware"); 67 SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 68 "machine dependent"); 69 SYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0, 70 "user-level"); 71 SYSCTL_NODE(, CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 72 "p1003_1b, (see p1003_1b.h)"); 73 74 SYSCTL_NODE(, OID_AUTO, compat, CTLFLAG_RW, 0, 75 "Compatibility code"); 76 77 SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD, 78 osrelease, 0, "Operating system type"); 79 80 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD, 81 0, BSD, "Operating system revision"); 82 83 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD, 84 version, 0, "Kernel version"); 85 86 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD, 87 ostype, 0, "Operating system type"); 88 89 extern int osreldate; 90 SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD, 91 &osreldate, 0, "Operating system release date"); 92 93 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD, 94 &maxproc, 0, "Maximum number of processes"); 95 96 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 97 &maxprocperuid, 0, "Maximum processes allowed per userid"); 98 99 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD, 100 0, ARG_MAX, "Maximum bytes of argument to execve(2)"); 101 102 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD, 103 0, _KPOSIX_VERSION, "Version of POSIX attempting to comply to"); 104 105 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD, 106 0, NGROUPS_MAX, "Maximum number of groups a user can belong to"); 107 108 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD, 109 0, 1, "Whether job control is available"); 110 111 #ifdef _POSIX_SAVED_IDS 112 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 113 0, 1, "Whether saved set-group/user ID is available"); 114 #else 115 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 116 0, 0, "Whether saved set-group/user ID is available"); 117 #endif 118 119 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 120 121 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW, 122 kernelname, sizeof kernelname, "Name of kernel file booted"); 123 124 #ifdef SMP 125 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, 126 &mp_ncpus, 0, "Number of active CPUs"); 127 #else 128 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, 129 0, 1, "Number of active CPUs"); 130 #endif 131 132 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD, 133 0, BYTE_ORDER, "System byte order"); 134 135 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD, 136 0, PAGE_SIZE, "System memory page size"); 137 138 static char machine_arch[] = MACHINE_ARCH; 139 SYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD, 140 machine_arch, 0, "System architecture"); 141 142 char hostname[MAXHOSTNAMELEN]; 143 144 static int 145 sysctl_hostname(SYSCTL_HANDLER_ARGS) 146 { 147 int error; 148 149 if (req->p->p_prison) { 150 if (!jail_set_hostname_allowed && req->newptr) 151 return(EPERM); 152 error = sysctl_handle_string(oidp, 153 req->p->p_prison->pr_host, 154 sizeof req->p->p_prison->pr_host, req); 155 } else 156 error = sysctl_handle_string(oidp, 157 hostname, sizeof hostname, req); 158 return (error); 159 } 160 161 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 162 CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_PRISON, 163 0, 0, sysctl_hostname, "A", "Hostname"); 164 165 int securelevel = -1; 166 167 static int 168 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 169 { 170 int error, level; 171 172 level = securelevel; 173 error = sysctl_handle_int(oidp, &level, 0, req); 174 if (error || !req->newptr) 175 return (error); 176 if (level < securelevel) 177 return (EPERM); 178 securelevel = level; 179 return (error); 180 } 181 182 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, CTLTYPE_INT|CTLFLAG_RW, 183 0, 0, sysctl_kern_securelvl, "I", "Current secure level"); 184 185 char domainname[MAXHOSTNAMELEN]; 186 SYSCTL_STRING(_kern, KERN_NISDOMAINNAME, domainname, CTLFLAG_RW, 187 &domainname, sizeof(domainname), "Name of the current YP/NIS domain"); 188 189 long hostid; 190 /* Some trouble here, if sizeof (int) != sizeof (long) */ 191 SYSCTL_INT(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "Host ID"); 192 193 /* 194 * This is really cheating. These actually live in the libc, something 195 * which I'm not quite sure is a good idea anyway, but in order for 196 * getnext and friends to actually work, we define dummies here. 197 */ 198 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 199 "", 0, "PATH that finds all the standard utilities"); 200 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 201 0, 0, "Max ibase/obase values in bc(1)"); 202 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 203 0, 0, "Max array size in bc(1)"); 204 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 205 0, 0, "Max scale value in bc(1)"); 206 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 207 0, 0, "Max string length in bc(1)"); 208 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 209 0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 210 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, ""); 211 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 212 0, 0, "Max length (bytes) of a text-processing utility's input line"); 213 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 214 0, 0, "Maximum number of repeats of a regexp permitted"); 215 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 216 0, 0, 217 "The version of POSIX 1003.2 with which the system attempts to comply"); 218 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 219 0, 0, "Whether C development supports the C bindings option"); 220 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 221 0, 0, "Whether system supports the C development utilities option"); 222 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 223 0, 0, ""); 224 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 225 0, 0, "Whether system supports FORTRAN development utilities"); 226 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 227 0, 0, "Whether system supports FORTRAN runtime utilities"); 228 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 229 0, 0, "Whether system supports creation of locales"); 230 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 231 0, 0, "Whether system supports software development utilities"); 232 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 233 0, 0, "Whether system supports the user portability utilities"); 234 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 235 0, 0, "Min Maximum number of streams a process may have open at one time"); 236 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 237 0, 0, "Min Maximum number of types supported for timezone names"); 238 239 #include <sys/vnode.h> 240 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 241 0, sizeof(struct vnode), "sizeof(struct vnode)"); 242 243 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 244 0, sizeof(struct proc), "sizeof(struct proc)"); 245 246 #include <sys/conf.h> 247 SYSCTL_INT(_debug_sizeof, OID_AUTO, specinfo, CTLFLAG_RD, 248 0, sizeof(struct specinfo), "sizeof(struct specinfo)"); 249 250 #include <sys/bio.h> 251 #include <sys/buf.h> 252 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 253 0, sizeof(struct bio), "sizeof(struct bio)"); 254 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 255 0, sizeof(struct buf), "sizeof(struct buf)"); 256