freebsd_sysctl.c revision 1.2
1 /* $NetBSD: freebsd_sysctl.c,v 1.2 2005/02/26 23:10:18 perry 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 2005/02/26 23:10:18 perry 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(freebsd_sysctl_setup, "freebsd emulated sysctl setup") 69 { 70 sysctl_createv(clog, 0, NULL, NULL, 71 CTLFLAG_PERMANENT, 72 CTLTYPE_NODE, "kern", NULL, 73 NULL, 0, NULL, 0, 74 CTL_KERN, CTL_EOL); 75 sysctl_createv(clog, 0, NULL, NULL, 76 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 77 CTLTYPE_INT, "osreldate", 78 SYSCTL_DESCR("Operating system revision"), 79 NULL, __NetBSD_Version__, NULL, 0, 80 CTL_KERN, CTL_CREATE, CTL_EOL); 81 } 82 83 int 84 freebsd_sys_sysctl(l, v, retval) 85 struct lwp *l; 86 void *v; 87 register_t *retval; 88 { 89 struct freebsd_sys_sysctl_args /* { 90 syscallarg(int *) name; 91 syscallarg(u_int) namelen; 92 syscallarg(void *) old; 93 syscallarg(size_t *) oldlenp; 94 syscallarg(void *) new; 95 syscallarg(size_t) newlen; 96 } */ *uap = v; 97 int error, *name; 98 size_t newlen, *oldlenp; 99 u_int namelen; 100 void *new, *old; 101 102 name = SCARG(uap, name); 103 namelen = SCARG(uap, namelen); 104 if (namelen > 0 && name[0] != 0) 105 return(sys___sysctl(l, v, retval)); 106 107 /* 108 * FreeBSD sysctl uses an undocumented set of special OIDs in it's 109 * sysctl MIB whose tree is rooted at oid 0. These OIDs are 110 * interpretted by their sysctl to implement functions that NetBSD 111 * performs in libc, such as sysctlgetmibinfo. 112 * 113 * From the FreeBSD kern_sysctl.c, these OIDs are: 114 * {0,0} printf the entire MIB-tree. 115 * {0,1,...} return the name of the "..." OID. 116 * {0,2,...} return the next OID. 117 * {0,3} return the OID of the name in "new" 118 * {0,4,...} return the kind & format info for the "..." OID. 119 * {0,5,...} return the description the "..." OID. 120 * 121 * Only implement {0,3} for now. 122 */ 123 124 if (namelen < 2 || namelen > CTL_MAXNAME) 125 return(EINVAL); 126 127 if (name[1] == 3) { 128 char *locnew; 129 int oid[CTL_MAXNAME]; 130 u_int oidlen = CTL_MAXNAME; 131 132 new = SCARG(uap, new); 133 newlen = SCARG(uap, newlen); 134 if (new == NULL || newlen < 1 || 135 newlen > (SYSCTL_NAMELEN * CTL_MAXNAME)) 136 return(EINVAL); 137 138 old = SCARG(uap, old); 139 oldlenp = SCARG(uap, oldlenp); 140 if (old == NULL || oldlenp == NULL || *oldlenp < sizeof(int)) 141 return(EINVAL); 142 143 if ((locnew = 144 (char *) malloc(newlen + 1, M_TEMP, M_WAITOK)) == NULL) 145 return(ENOMEM); 146 147 if ((error = copyinstr(new, locnew, newlen + 1, NULL)) || 148 (error = sysctl_lock(l, old, *oldlenp))) { 149 free(locnew, M_TEMP); 150 return(error); 151 } 152 153 error = freebsd_sysctl_name2oid(locnew, oid, &oidlen); 154 sysctl_unlock(l); 155 free(locnew, M_TEMP); 156 if (error) 157 return(error); 158 159 oidlen *= sizeof(int); 160 error = copyout(oid, SCARG(uap, old), 161 MIN(oidlen, *SCARG(uap, oldlenp))); 162 if (error) 163 return(error); 164 error = copyout(&oidlen, SCARG(uap, oldlenp), sizeof(u_int)); 165 166 return(error); 167 } 168 169 return(EOPNOTSUPP); 170 } 171 172 static int 173 freebsd_sysctl_name2oid(char *name, int *oid, int *oidlen) 174 { 175 char *dot; 176 int oi, ci; 177 struct sysctlnode *node, *pnode; 178 179 pnode = &sysctl_root; 180 node = sysctl_root.sysctl_child; 181 oi = 0; 182 if ((dot = strchr(name, (int)'.')) != NULL) 183 *dot++ = '\0'; 184 185 next: 186 while (*name != '\0' && node != NULL) { 187 for (ci = 0; ci < pnode->sysctl_clen; ci++) { 188 if (strcmp(name, node[ci].sysctl_name) == 0) { 189 oid[oi++] = node[ci].sysctl_num; 190 if ((name = dot) == NULL) { 191 *oidlen = oi; 192 return(0); 193 } 194 if ((dot = strchr(name, (int)'.')) != NULL) 195 *dot++ = '\0'; 196 197 if (SYSCTL_TYPE(node[ci].sysctl_flags) != 198 CTLTYPE_NODE) 199 return(ENOTDIR); 200 201 pnode = &node[ci]; 202 node = pnode->sysctl_child; 203 goto next; 204 } 205 } 206 207 /* no more nodes, it must not exist */ 208 break; 209 } 210 211 return(ENOENT); 212 } 213
Indexes created Wed Sep 24 05:09:52 GMT 2025