1 /* $NetBSD: kern_info_43.c,v 1.40 2021/09/07 11:43:02 riastradh Exp $ */
2
3 /*
4 * Copyright (c) 1982, 1986, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)subr_xxx.c 8.1 (Berkeley) 6/10/93
32 */
33
34 #include <sys/cdefs.h>
35 __KERNEL_RCSID(0, "$NetBSD: kern_info_43.c,v 1.40 2021/09/07 11:43:02 riastradh Exp $");
36
37 #if defined(_KERNEL_OPT)
38 #include "opt_compat_netbsd.h"
39 #endif
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/filedesc.h>
44 #include <sys/kernel.h>
45 #include <sys/vnode.h>
46 #include <sys/proc.h>
47 #include <sys/file.h>
48 #include <sys/socket.h>
49 #include <sys/socketvar.h>
50 #include <sys/stat.h>
51 #include <sys/ioctl.h>
52 #include <sys/fcntl.h>
53 #include <sys/syslog.h>
54 #include <sys/unistd.h>
55 #include <sys/resourcevar.h>
56 #include <sys/kauth.h>
57 #include <sys/cpu.h>
58
59 #include <uvm/uvm_extern.h>
60 #include <sys/sysctl.h>
61
62 #include <sys/mount.h>
63 #include <sys/syscall.h>
64 #include <sys/syscallvar.h>
65 #include <sys/syscallargs.h>
66 #include <compat/sys/time.h>
67
68 #include <compat/common/compat_mod.h>
69
70 static struct syscall_package kern_info_43_syscalls[] = {
71 { SYS_compat_43_ogetdtablesize, 0,
72 (sy_call_t *)compat_43_sys_getdtablesize },
73 { SYS_compat_43_ogethostid, 0, (sy_call_t *)compat_43_sys_gethostid },
74 { SYS_compat_43_ogethostname, 0,
75 (sy_call_t *)compat_43_sys_gethostname },
76 { SYS_compat_43_ogetkerninfo, 0,
77 (sy_call_t *)compat_43_sys_getkerninfo },
78 { SYS_compat_43_osethostid, 0, (sy_call_t *)compat_43_sys_sethostid },
79 { SYS_compat_43_osethostname, 0,
80 (sy_call_t *)compat_43_sys_sethostname },
81 { 0, 0, NULL }
82 };
83
84 int
compat_43_sys_getdtablesize(struct lwp * l,const void * v,register_t * retval)85 compat_43_sys_getdtablesize(struct lwp *l, const void *v, register_t *retval)
86 {
87 struct proc *p = l->l_proc;
88
89 mutex_enter(p->p_lock);
90 *retval = uimin((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, maxfiles);
91 mutex_exit(p->p_lock);
92 return (0);
93 }
94
95
96 /* ARGSUSED */
97 int
compat_43_sys_gethostid(struct lwp * l,const void * v,register_t * retval)98 compat_43_sys_gethostid(struct lwp *l, const void *v, register_t *retval)
99 {
100
101 *(int32_t *)retval = hostid;
102 return (0);
103 }
104
105
106 /*ARGSUSED*/
107 int
compat_43_sys_gethostname(struct lwp * l,const struct compat_43_sys_gethostname_args * uap,register_t * retval)108 compat_43_sys_gethostname(struct lwp *l, const struct compat_43_sys_gethostname_args *uap, register_t *retval)
109 {
110 /* {
111 syscallarg(char *) hostname;
112 syscallarg(u_int) len;
113 } */
114 int name[2];
115 size_t sz;
116
117 name[0] = CTL_KERN;
118 name[1] = KERN_HOSTNAME;
119 sz = SCARG(uap, len);
120 return (old_sysctl(&name[0], 2, SCARG(uap, hostname), &sz, 0, 0, l));
121 }
122
123 #define KINFO_PROC (0<<8)
124 #define KINFO_RT (1<<8)
125 #define KINFO_VNODE (2<<8)
126 #define KINFO_FILE (3<<8)
127 #define KINFO_METER (4<<8)
128 #define KINFO_LOADAVG (5<<8)
129 #define KINFO_CLOCKRATE (6<<8)
130 #define KINFO_BSDI_SYSINFO (101<<8)
131
132
133 /*
134 * The string data is appended to the end of the bsdi_si structure during
135 * copyout. The "char *" offsets in the bsdi_si struct are relative to the
136 * base of the bsdi_si struct.
137 */
138 struct bsdi_si {
139 char *machine;
140 char *cpu_model;
141 long ncpu;
142 long cpuspeed;
143 long hwflags;
144 u_long physmem;
145 u_long usermem;
146 u_long pagesize;
147
148 char *ostype;
149 char *osrelease;
150 long os_revision;
151 long posix1_version;
152 char *version;
153
154 long hz;
155 long profhz;
156 int ngroups_max;
157 long arg_max;
158 long open_max;
159 long child_max;
160
161 struct timeval50 boottime;
162 char *hostname;
163 };
164
165 int
compat_43_sys_getkerninfo(struct lwp * l,const struct compat_43_sys_getkerninfo_args * uap,register_t * retval)166 compat_43_sys_getkerninfo(struct lwp *l, const struct compat_43_sys_getkerninfo_args *uap, register_t *retval)
167 {
168 /* {
169 syscallarg(int) op;
170 syscallarg(char *) where;
171 syscallarg(int *) size;
172 syscallarg(int) arg;
173 } */
174 int error, name[6];
175 int isize;
176 size_t size;
177
178 if (!SCARG(uap, size))
179 return EINVAL;
180
181 if ((error = copyin(SCARG(uap, size), &isize, sizeof(isize))) != 0)
182 return error;
183
184 if (isize < 0 || isize > 4096)
185 return EINVAL;
186
187 size = isize;
188
189 switch (SCARG(uap, op) & 0xff00) {
190
191 case KINFO_RT:
192 name[0] = CTL_NET;
193 name[1] = PF_ROUTE;
194 name[2] = 0;
195 name[3] = (SCARG(uap, op) & 0xff0000) >> 16;
196 name[4] = SCARG(uap, op) & 0xff;
197 name[5] = SCARG(uap, arg);
198 error = old_sysctl(&name[0], 6, SCARG(uap, where), &size,
199 NULL, 0, l);
200 break;
201
202 case KINFO_VNODE:
203 name[0] = CTL_KERN;
204 name[1] = KERN_VNODE;
205 error = old_sysctl(&name[0], 2, SCARG(uap, where), &size,
206 NULL, 0, l);
207 break;
208
209 case KINFO_PROC:
210 name[0] = CTL_KERN;
211 name[1] = KERN_PROC;
212 name[2] = SCARG(uap, op) & 0xff;
213 name[3] = SCARG(uap, arg);
214 error = old_sysctl(&name[0], 4, SCARG(uap, where), &size,
215 NULL, 0, l);
216 break;
217
218 case KINFO_FILE:
219 name[0] = CTL_KERN;
220 name[1] = KERN_FILE;
221 error = old_sysctl(&name[0], 2, SCARG(uap, where), &size,
222 NULL, 0, l);
223 break;
224
225 case KINFO_METER:
226 name[0] = CTL_VM;
227 name[1] = VM_METER;
228 error = old_sysctl(&name[0], 2, SCARG(uap, where), &size,
229 NULL, 0, l);
230 break;
231
232 case KINFO_LOADAVG:
233 name[0] = CTL_VM;
234 name[1] = VM_LOADAVG;
235 error = old_sysctl(&name[0], 2, SCARG(uap, where), &size,
236 NULL, 0, l);
237 break;
238
239 case KINFO_CLOCKRATE:
240 name[0] = CTL_KERN;
241 name[1] = KERN_CLOCKRATE;
242 error = old_sysctl(&name[0], 2, SCARG(uap, where), &size,
243 NULL, 0, l);
244 break;
245
246
247 case KINFO_BSDI_SYSINFO:
248 {
249 size_t len;
250 struct bsdi_si *usi =
251 (struct bsdi_si *) SCARG(uap, where);
252 struct bsdi_si ksi;
253 struct timeval tv;
254 const char *cpu_model = cpu_getmodel();
255 char *us = (char *) &usi[1];
256
257 if (usi == NULL) {
258 size = sizeof(ksi) +
259 strlen(ostype) + strlen(cpu_model) +
260 strlen(osrelease) + strlen(machine) +
261 strlen(version) + strlen(hostname) + 6;
262 error = 0;
263 break;
264 }
265
266 memset(&ksi, 0, sizeof(ksi));
267
268 #define COPY(fld) \
269 ksi.fld = us - (u_long) usi; \
270 if ((error = copyoutstr(fld, us, 1024, &len)) != 0)\
271 return error; \
272 us += len
273
274 COPY(machine);
275 COPY(cpu_model);
276 ksi.ncpu = ncpu; /* XXX */
277 ksi.cpuspeed = 40; /* XXX */
278 ksi.hwflags = 0; /* XXX */
279 ksi.physmem = ctob(physmem);
280 ksi.usermem = ctob(physmem); /* XXX */
281 ksi.pagesize = PAGE_SIZE;
282
283 COPY(ostype);
284 COPY(osrelease);
285 ksi.os_revision = NetBSD; /* XXX */
286 ksi.posix1_version = _POSIX_VERSION;
287 COPY(version); /* XXX */
288
289 ksi.hz = hz;
290 ksi.profhz = profhz;
291 ksi.ngroups_max = NGROUPS_MAX;
292 ksi.arg_max = ARG_MAX;
293 ksi.open_max = OPEN_MAX;
294 ksi.child_max = CHILD_MAX;
295
296 getmicroboottime(&tv);
297 timeval_to_timeval50(&tv, &ksi.boottime);
298 COPY(hostname);
299
300 size = (us - (char *) &usi[1]) + sizeof(ksi);
301
302 if ((error = copyout(&ksi, usi, sizeof(ksi))) != 0)
303 return error;
304 }
305 break;
306
307 default:
308 return (EOPNOTSUPP);
309 }
310 if (error)
311 return (error);
312 *retval = size;
313 if (SCARG(uap, size))
314 error = copyout((void *)&size, (void *)SCARG(uap, size),
315 sizeof(size));
316 return (error);
317 }
318
319
320 /* ARGSUSED */
321 int
compat_43_sys_sethostid(struct lwp * l,const struct compat_43_sys_sethostid_args * uap,register_t * retval)322 compat_43_sys_sethostid(struct lwp *l, const struct compat_43_sys_sethostid_args *uap, register_t *retval)
323 {
324 long uhostid;
325 int name[2];
326
327 uhostid = SCARG(uap, hostid);
328 name[0] = CTL_KERN;
329 name[1] = KERN_HOSTID;
330
331 return (old_sysctl(&name[0], 2, 0, 0, &uhostid, sizeof(long), l));
332 }
333
334
335 /* ARGSUSED */
336 int
compat_43_sys_sethostname(struct lwp * l,const struct compat_43_sys_sethostname_args * uap,register_t * retval)337 compat_43_sys_sethostname(struct lwp *l, const struct compat_43_sys_sethostname_args *uap, register_t *retval)
338 {
339 int name[2];
340
341 name[0] = CTL_KERN;
342 name[1] = KERN_HOSTNAME;
343 return (old_sysctl(&name[0], 2, 0, 0, SCARG(uap, hostname),
344 SCARG(uap, len), l));
345 }
346
347 int
kern_info_43_init(void)348 kern_info_43_init(void)
349 {
350
351 return syscall_establish(NULL, kern_info_43_syscalls);
352 }
353
354 int
kern_info_43_fini(void)355 kern_info_43_fini(void)
356 {
357
358 return syscall_disestablish(NULL, kern_info_43_syscalls);
359 }
360