freebsd_sysctl.c revision 1.2.4.2
1 /* $NetBSD: freebsd_sysctl.c,v 1.2.4.2 2006/11/11 19:58:14 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * FreeBSD compatibility module. Try to deal with various FreeBSD sysctl calls. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: freebsd_sysctl.c,v 1.2.4.2 2006/11/11 19:58:14 bouyer Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/proc.h> 49 #include <sys/mount.h> 50 #include <sys/signal.h> 51 #include <sys/signalvar.h> 52 #include <sys/malloc.h> 53 #include <sys/mman.h> 54 #include <sys/sysctl.h> 55 56 #include <sys/sa.h> 57 #include <sys/syscallargs.h> 58 59 #include <compat/freebsd/freebsd_syscallargs.h> 60 #include <compat/common/compat_util.h> 61 #include <compat/freebsd/freebsd_rtprio.h> 62 #include <compat/freebsd/freebsd_timex.h> 63 #include <compat/freebsd/freebsd_signal.h> 64 #include <compat/freebsd/freebsd_mman.h> 65 66 static int freebsd_sysctl_name2oid(char *, int *, int *); 67 68 SYSCTL_SETUP_PROTO(freebsd_sysctl_setup); 69 SYSCTL_SETUP(freebsd_sysctl_setup, "freebsd emulated sysctl setup") 70 { 71 sysctl_createv(clog, 0, NULL, NULL, 72 CTLFLAG_PERMANENT, 73 CTLTYPE_NODE, "kern", NULL, 74 NULL, 0, NULL, 0, 75 CTL_KERN, CTL_EOL); 76 sysctl_createv(clog, 0, NULL, NULL, 77 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 78 CTLTYPE_INT, "osreldate", 79 SYSCTL_DESCR("Operating system revision"), 80 NULL, __NetBSD_Version__, NULL, 0, 81 CTL_KERN, CTL_CREATE, CTL_EOL); 82 } 83 84 int 85 freebsd_sys_sysctl(l, v, retval) 86 struct lwp *l; 87 void *v; 88 register_t *retval; 89 { 90 struct freebsd_sys_sysctl_args /* { 91 syscallarg(int *) name; 92 syscallarg(u_int) namelen; 93 syscallarg(void *) old; 94 syscallarg(size_t *) oldlenp; 95 syscallarg(void *) new; 96 syscallarg(size_t) newlen; 97 } */ *uap = v; 98 int error; 99 int name[CTL_MAXNAME]; 100 size_t newlen, *oldlenp; 101 u_int namelen; 102 void *new, *old; 103 104 namelen = SCARG(uap, namelen); 105 106 if ((namelen > CTL_MAXNAME) || (namelen < 1)) 107 return EINVAL; 108 109 if ((error = copyin(SCARG(uap, name), name, 110 namelen * sizeof(*name))) != 0) 111 return error; 112 113 if (namelen > 0 && name[0] != 0) 114 return(sys___sysctl(l, v, retval)); 115 116 /* 117 * FreeBSD sysctl uses an undocumented set of special OIDs in it's 118 * sysctl MIB whose tree is rooted at oid 0. These OIDs are 119 * interpretted by their sysctl to implement functions that NetBSD 120 * performs in libc, such as sysctlgetmibinfo. 121 * 122 * From the FreeBSD kern_sysctl.c, these OIDs are: 123 * {0,0} printf the entire MIB-tree. 124 * {0,1,...} return the name of the "..." OID. 125 * {0,2,...} return the next OID. 126 * {0,3} return the OID of the name in "new" 127 * {0,4,...} return the kind & format info for the "..." OID. 128 * {0,5,...} return the description the "..." OID. 129 * 130 * Only implement {0,3} for now. 131 */ 132 133 if (namelen < 2 || namelen > CTL_MAXNAME) 134 return(EINVAL); 135 136 if (name[1] == 3) { 137 char *locnew; 138 int oid[CTL_MAXNAME]; 139 u_int oidlen = CTL_MAXNAME; 140 141 new = SCARG(uap, new); 142 newlen = SCARG(uap, newlen); 143 if (new == NULL || newlen < 1 || 144 newlen > (SYSCTL_NAMELEN * CTL_MAXNAME)) 145 return(EINVAL); 146 147 old = SCARG(uap, old); 148 oldlenp = SCARG(uap, oldlenp); 149 if (old == NULL || oldlenp == NULL || *oldlenp < sizeof(int)) 150 return(EINVAL); 151 152 if ((locnew = 153 (char *) malloc(newlen + 1, M_TEMP, M_WAITOK)) == NULL) 154 return(ENOMEM); 155 156 if ((error = copyinstr(new, locnew, newlen + 1, NULL)) || 157 (error = sysctl_lock(l, old, *oldlenp))) { 158 free(locnew, M_TEMP); 159 return(error); 160 } 161 162 error = freebsd_sysctl_name2oid(locnew, oid, &oidlen); 163 sysctl_unlock(l); 164 free(locnew, M_TEMP); 165 if (error) 166 return(error); 167 168 oidlen *= sizeof(int); 169 error = copyout(oid, SCARG(uap, old), 170 MIN(oidlen, *SCARG(uap, oldlenp))); 171 if (error) 172 return(error); 173 error = copyout(&oidlen, SCARG(uap, oldlenp), sizeof(u_int)); 174 175 return(error); 176 } 177 178 return(EOPNOTSUPP); 179 } 180 181 static int 182 freebsd_sysctl_name2oid(char *name, int *oid, int *oidlen) 183 { 184 char *dot; 185 int oi, ci; 186 struct sysctlnode *node, *pnode; 187 188 pnode = &sysctl_root; 189 node = sysctl_root.sysctl_child; 190 oi = 0; 191 if ((dot = strchr(name, (int)'.')) != NULL) 192 *dot++ = '\0'; 193 194 next: 195 while (*name != '\0' && node != NULL) { 196 for (ci = 0; ci < pnode->sysctl_clen; ci++) { 197 if (strcmp(name, node[ci].sysctl_name) == 0) { 198 oid[oi++] = node[ci].sysctl_num; 199 if ((name = dot) == NULL) { 200 *oidlen = oi; 201 return(0); 202 } 203 if ((dot = strchr(name, (int)'.')) != NULL) 204 *dot++ = '\0'; 205 206 if (SYSCTL_TYPE(node[ci].sysctl_flags) != 207 CTLTYPE_NODE) 208 return(ENOTDIR); 209 210 pnode = &node[ci]; 211 node = pnode->sysctl_child; 212 goto next; 213 } 214 } 215 216 /* no more nodes, it must not exist */ 217 break; 218 } 219 220 return(ENOENT); 221 } 222
Indexes created Wed Oct 22 13:09:56 GMT 2025