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 */ 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/lockf.h> 49 #include <sys/jail.h> 50 #include <machine/smp.h> 51 52 SYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0, 53 "Sysctl internal magic"); 54 SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0, 55 "High kernel, proc, limits &c"); 56 SYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0, 57 "Virtual memory"); 58 SYSCTL_NODE(, CTL_VFS, vfs, CTLFLAG_RW, 0, 59 "File system"); 60 SYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0, 61 "Network, (see socket.h)"); 62 SYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0, 63 "Debugging"); 64 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 65 "Size of various kernel data structures"); 66 SYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0, 67 "hardware"); 68 SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 69 "machine dependent"); 70 SYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0, 71 "user-level"); 72 SYSCTL_NODE(, CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 73 "p1003_1b, (see p1003_1b.h)"); 74 SYSCTL_NODE(, CTL_LWKT, lwkt, CTLFLAG_RW, 0, 75 "light weight kernel threads"); 76 77 SYSCTL_NODE(, OID_AUTO, compat, CTLFLAG_RW, 0, 78 "Compatibility code"); 79 SYSCTL_NODE(, OID_AUTO, security, CTLFLAG_RW, 0, 80 "Security"); 81 82 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD, 83 kern_ident, 0, "Kernel identifier"); 84 85 SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD, 86 osrelease, 0, "Operating system type"); 87 88 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD, 89 0, BSD, "Operating system revision"); 90 91 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD, 92 version, 0, "Kernel version"); 93 94 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD, 95 ostype, 0, "Operating system type"); 96 97 SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD, 98 &osreldate, 0, "Operating system release date"); 99 100 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD, 101 &maxproc, 0, "Maximum number of processes"); 102 103 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 104 &maxprocperuid, 0, "Maximum processes allowed per userid"); 105 106 SYSCTL_INT(_kern, KERN_MAXPOSIXLOCKSPERUID, maxposixlocksperuid, CTLFLAG_RW, 107 &maxposixlocksperuid, 0, "Maximum number of POSIX-type locks per user id"); 108 109 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RD, 110 &maxusers, 0, "Hint for kernel tuning"); 111 112 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD, 113 0, ARG_MAX, "Maximum bytes of argument to execve(2)"); 114 115 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD, 116 0, _KPOSIX_VERSION, "Version of POSIX attempting to comply to"); 117 118 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD, 119 0, NGROUPS_MAX, "Maximum number of groups a user can belong to"); 120 121 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD, 122 0, 1, "Whether job control is available"); 123 124 #ifdef _POSIX_SAVED_IDS 125 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 126 0, 1, "Whether saved set-group/user ID is available"); 127 #else 128 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 129 0, 0, "Whether saved set-group/user ID is available"); 130 #endif 131 132 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 133 134 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW, 135 kernelname, sizeof kernelname, "Name of kernel file booted"); 136 137 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, 138 &ncpus, 0, "Number of active CPUs"); 139 140 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD, 141 0, BYTE_ORDER, "System byte order"); 142 143 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD, 144 0, PAGE_SIZE, "System memory page size"); 145 146 static char platform[] = MACHINE_PLATFORM; 147 SYSCTL_STRING(_hw, HW_MACHINE_PLATFORM, platform, CTLFLAG_RD, 148 platform, 0, "Platform architecture"); 149 150 static char machine_arch[] = MACHINE_ARCH; 151 SYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD, 152 machine_arch, 0, "Cpu architecture"); 153 154 char hostname[MAXHOSTNAMELEN]; 155 156 static int 157 sysctl_hostname(SYSCTL_HANDLER_ARGS) 158 { 159 struct thread *td = req->td; 160 struct proc *p = td ? td->td_proc : NULL; 161 int error; 162 163 if (p && p->p_ucred->cr_prison) { 164 if (!jail_set_hostname_allowed && req->newptr) 165 return(EPERM); 166 error = sysctl_handle_string(oidp, 167 p->p_ucred->cr_prison->pr_host, 168 sizeof p->p_ucred->cr_prison->pr_host, req); 169 } else { 170 error = sysctl_handle_string(oidp, 171 hostname, sizeof hostname, req); 172 } 173 return (error); 174 } 175 176 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 177 CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_PRISON, 178 0, 0, sysctl_hostname, "A", "Hostname"); 179 180 int securelevel = -1; 181 int kernel_mem_readonly = 0; 182 183 static int 184 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 185 { 186 int error, level; 187 188 level = securelevel; 189 error = sysctl_handle_int(oidp, &level, 0, req); 190 if (error || !req->newptr) 191 return (error); 192 if (level < securelevel) 193 return (EPERM); 194 securelevel = level; 195 return (error); 196 } 197 198 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, CTLTYPE_INT|CTLFLAG_RW, 199 0, 0, sysctl_kern_securelvl, "I", "Current secure level"); 200 201 char domainname[MAXHOSTNAMELEN]; 202 SYSCTL_STRING(_kern, KERN_NISDOMAINNAME, domainname, CTLFLAG_RW, 203 &domainname, sizeof(domainname), "Name of the current YP/NIS domain"); 204 205 unsigned long hostid; 206 SYSCTL_ULONG(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "Host ID"); 207 208 /* 209 * This is really cheating. These actually live in the libc, something 210 * which I'm not quite sure is a good idea anyway, but in order for 211 * getnext and friends to actually work, we define dummies here. 212 */ 213 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 214 "", 0, "PATH that finds all the standard utilities"); 215 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 216 0, 0, "Max ibase/obase values in bc(1)"); 217 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 218 0, 0, "Max array size in bc(1)"); 219 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 220 0, 0, "Max scale value in bc(1)"); 221 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 222 0, 0, "Max string length in bc(1)"); 223 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 224 0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 225 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, ""); 226 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 227 0, 0, "Max length (bytes) of a text-processing utility's input line"); 228 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 229 0, 0, "Maximum number of repeats of a regexp permitted"); 230 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 231 0, 0, 232 "The version of POSIX 1003.2 with which the system attempts to comply"); 233 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 234 0, 0, "Whether C development supports the C bindings option"); 235 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 236 0, 0, "Whether system supports the C development utilities option"); 237 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 238 0, 0, ""); 239 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 240 0, 0, "Whether system supports FORTRAN development utilities"); 241 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 242 0, 0, "Whether system supports FORTRAN runtime utilities"); 243 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 244 0, 0, "Whether system supports creation of locales"); 245 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 246 0, 0, "Whether system supports software development utilities"); 247 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 248 0, 0, "Whether system supports the user portability utilities"); 249 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 250 0, 0, "Min Maximum number of streams a process may have open at one time"); 251 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 252 0, 0, "Min Maximum number of types supported for timezone names"); 253 254 #include <sys/vnode.h> 255 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 256 0, sizeof(struct vnode), "sizeof(struct vnode)"); 257 258 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 259 0, sizeof(struct proc), "sizeof(struct proc)"); 260 261 #include <sys/conf.h> 262 SYSCTL_INT(_debug_sizeof, OID_AUTO, cdev, CTLFLAG_RD, 263 0, sizeof(struct cdev), "sizeof(struct cdev)"); 264