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