1 /*-
2 * Copyright (c) 2002 Doug Rabson
3 * Copyright (c) 1994-1995 Søren Schmidt
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer
11 * in this position and unchanged.
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. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 #include "opt_mac.h"
34
35 #include <sys/param.h>
36 #include <sys/blist.h>
37 #include <sys/fcntl.h>
38 #if defined(__i386__) || defined(__alpha__)
39 #include <sys/imgact_aout.h>
40 #endif
41 #include <sys/jail.h>
42 #include <sys/kernel.h>
43 #include <sys/limits.h>
44 #include <sys/lock.h>
45 #include <sys/mac.h>
46 #include <sys/malloc.h>
47 #include <sys/mman.h>
48 #include <sys/mount.h>
49 #include <sys/mutex.h>
50 #include <sys/namei.h>
51 #include <sys/proc.h>
52 #include <sys/reboot.h>
53 #include <sys/resourcevar.h>
54 #include <sys/signalvar.h>
55 #include <sys/stat.h>
56 #include <sys/syscallsubr.h>
57 #include <sys/sysctl.h>
58 #include <sys/sysproto.h>
59 #include <sys/systm.h>
60 #include <sys/time.h>
61 #include <sys/vmmeter.h>
62 #include <sys/vnode.h>
63 #include <sys/wait.h>
64
65 #include <vm/vm.h>
66 #include <vm/pmap.h>
67 #include <vm/vm_kern.h>
68 #include <vm/vm_map.h>
69 #include <vm/vm_extern.h>
70 #include <vm/vm_object.h>
71 #include <vm/swap_pager.h>
72
73 #include <posix4/sched.h>
74
75 #include "opt_compat.h"
76
77 #include <compat/linux/linux_sysproto.h>
78
79 #ifdef COMPAT_LINUX32
80 #include <machine/../linux32/linux.h>
81 #include <machine/../linux32/linux32_proto.h>
82 #else
83 #include <machine/../linux/linux.h>
84 #include <machine/../linux/linux_proto.h>
85 #endif
86
87 #include <compat/linux/linux_mib.h>
88 #include <compat/linux/linux_util.h>
89
90 #ifdef __i386__
91 #include <machine/cputypes.h>
92 #endif
93
94 #ifdef __alpha__
95 #define BSD_TO_LINUX_SIGNAL(sig) (sig)
96 #else
97 #define BSD_TO_LINUX_SIGNAL(sig) \
98 (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig)
99 #endif
100
101 #ifndef __alpha__
102 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
103 RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
104 RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE,
105 RLIMIT_MEMLOCK, RLIMIT_AS
106 };
107 #endif /*!__alpha__*/
108
109 struct l_sysinfo {
110 l_long uptime; /* Seconds since boot */
111 l_ulong loads[3]; /* 1, 5, and 15 minute load averages */
112 #define LINUX_SYSINFO_LOADS_SCALE 65536
113 l_ulong totalram; /* Total usable main memory size */
114 l_ulong freeram; /* Available memory size */
115 l_ulong sharedram; /* Amount of shared memory */
116 l_ulong bufferram; /* Memory used by buffers */
117 l_ulong totalswap; /* Total swap space size */
118 l_ulong freeswap; /* swap space still available */
119 l_ushort procs; /* Number of current processes */
120 l_ulong totalbig;
121 l_ulong freebig;
122 l_uint mem_unit;
123 char _f[6]; /* Pads structure to 64 bytes */
124 };
125 #ifndef __alpha__
126 int
127 linux_sysinfo(struct thread *td, struct linux_sysinfo_args *args)
128 {
129 struct l_sysinfo sysinfo;
130 vm_object_t object;
131 int i, j;
132 struct timespec ts;
133
134 getnanouptime(&ts);
135 if (ts.tv_nsec != 0)
136 ts.tv_sec++;
137 sysinfo.uptime = ts.tv_sec;
138
139 /* Use the information from the mib to get our load averages */
140 for (i = 0; i < 3; i++)
141 sysinfo.loads[i] = averunnable.ldavg[i] *
142 LINUX_SYSINFO_LOADS_SCALE / averunnable.fscale;
143
144 sysinfo.totalram = physmem * PAGE_SIZE;
145 sysinfo.freeram = sysinfo.totalram - cnt.v_wire_count * PAGE_SIZE;
146
147 sysinfo.sharedram = 0;
148 mtx_lock(&vm_object_list_mtx);
149 TAILQ_FOREACH(object, &vm_object_list, object_list)
150 if (object->shadow_count > 1)
151 sysinfo.sharedram += object->resident_page_count;
152 mtx_unlock(&vm_object_list_mtx);
153
154 sysinfo.sharedram *= PAGE_SIZE;
155 sysinfo.bufferram = 0;
156
157 swap_pager_status(&i, &j);
158 sysinfo.totalswap = i * PAGE_SIZE;
159 sysinfo.freeswap = (i - j) * PAGE_SIZE;
160
161 sysinfo.procs = nprocs;
162
163 /* The following are only present in newer Linux kernels. */
164 sysinfo.totalbig = 0;
165 sysinfo.freebig = 0;
166 sysinfo.mem_unit = 1;
167
168 return copyout(&sysinfo, args->info, sizeof(sysinfo));
169 }
170 #endif /*!__alpha__*/
171
172 #ifndef __alpha__
173 int
174 linux_alarm(struct thread *td, struct linux_alarm_args *args)
175 {
176 struct itimerval it, old_it;
177 int error;
178
179 #ifdef DEBUG
180 if (ldebug(alarm))
181 printf(ARGS(alarm, "%u"), args->secs);
182 #endif
183
184 if (args->secs > 100000000)
185 return (EINVAL);
186
187 it.it_value.tv_sec = (long)args->secs;
188 it.it_value.tv_usec = 0;
189 it.it_interval.tv_sec = 0;
190 it.it_interval.tv_usec = 0;
191 error = kern_setitimer(td, ITIMER_REAL, &it, &old_it);
192 if (error)
193 return (error);
194 if (timevalisset(&old_it.it_value)) {
195 if (old_it.it_value.tv_usec != 0)
196 old_it.it_value.tv_sec++;
197 td->td_retval[0] = old_it.it_value.tv_sec;
198 }
199 return (0);
200 }
201 #endif /*!__alpha__*/
202
203 int
204 linux_brk(struct thread *td, struct linux_brk_args *args)
205 {
206 struct vmspace *vm = td->td_proc->p_vmspace;
207 vm_offset_t new, old;
208 struct obreak_args /* {
209 char * nsize;
210 } */ tmp;
211
212 #ifdef DEBUG
213 if (ldebug(brk))
214 printf(ARGS(brk, "%p"), (void *)(uintptr_t)args->dsend);
215 #endif
216 old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
217 new = (vm_offset_t)args->dsend;
218 tmp.nsize = (char *)new;
219 if (((caddr_t)new > vm->vm_daddr) && !obreak(td, &tmp))
220 td->td_retval[0] = (long)new;
221 else
222 td->td_retval[0] = (long)old;
223
224 return 0;
225 }
226
227 #if defined(__i386__) || defined(__alpha__)
228
229 int
230 linux_uselib(struct thread *td, struct linux_uselib_args *args)
231 {
232 struct nameidata ni;
233 struct vnode *vp;
234 struct exec *a_out;
235 struct vattr attr;
236 vm_offset_t vmaddr;
237 unsigned long file_offset;
238 vm_offset_t buffer;
239 unsigned long bss_size;
240 char *library;
241 int error;
242 int locked;
243
244 LCONVPATHEXIST(td, args->library, &library);
245
246 #ifdef DEBUG
247 if (ldebug(uselib))
248 printf(ARGS(uselib, "%s"), library);
249 #endif
250
251 a_out = NULL;
252 locked = 0;
253 vp = NULL;
254
255 /*
256 * XXX: This code should make use of vn_open(), rather than doing
257 * all this stuff itself.
258 */
259 NDINIT(&ni, LOOKUP, ISOPEN|FOLLOW|LOCKLEAF, UIO_SYSSPACE, library, td);
260 error = namei(&ni);
261 LFREEPATH(library);
262 if (error)
263 goto cleanup;
264
265 vp = ni.ni_vp;
266 /*
267 * XXX - This looks like a bogus check. A LOCKLEAF namei should not
268 * succeed without returning a vnode.
269 */
270 if (vp == NULL) {
271 error = ENOEXEC; /* ?? */
272 goto cleanup;
273 }
274 NDFREE(&ni, NDF_ONLY_PNBUF);
275
276 /*
277 * From here on down, we have a locked vnode that must be unlocked.
278 */
279 locked++;
280
281 /* Writable? */
282 if (vp->v_writecount) {
283 error = ETXTBSY;
284 goto cleanup;
285 }
286
287 /* Executable? */
288 error = VOP_GETATTR(vp, &attr, td->td_ucred, td);
289 if (error)
290 goto cleanup;
291
292 if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
293 ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) {
294 /* EACCESS is what exec(2) returns. */
295 error = ENOEXEC;
296 goto cleanup;
297 }
298
299 /* Sensible size? */
300 if (attr.va_size == 0) {
301 error = ENOEXEC;
302 goto cleanup;
303 }
304
305 /* Can we access it? */
306 error = VOP_ACCESS(vp, VEXEC, td->td_ucred, td);
307 if (error)
308 goto cleanup;
309
310 /*
311 * XXX: This should use vn_open() so that it is properly authorized,
312 * and to reduce code redundancy all over the place here.
313 */
314 #ifdef MAC
315 error = mac_check_vnode_open(td->td_ucred, vp, FREAD);
316 if (error)
317 goto cleanup;
318 #endif
319 error = VOP_OPEN(vp, FREAD, td->td_ucred, td, -1);
320 if (error)
321 goto cleanup;
322
323 /* Pull in executable header into kernel_map */
324 error = vm_mmap(kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE,
325 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp, 0);
326 /*
327 * Lock no longer needed
328 */
329 locked = 0;
330 VOP_UNLOCK(vp, 0, td);
331
332 if (error)
333 goto cleanup;
334
335 /* Is it a Linux binary ? */
336 if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
337 error = ENOEXEC;
338 goto cleanup;
339 }
340
341 /*
342 * While we are here, we should REALLY do some more checks
343 */
344
345 /* Set file/virtual offset based on a.out variant. */
346 switch ((int)(a_out->a_magic & 0xffff)) {
347 case 0413: /* ZMAGIC */
348 file_offset = 1024;
349 break;
350 case 0314: /* QMAGIC */
351 file_offset = 0;
352 break;
353 default:
354 error = ENOEXEC;
355 goto cleanup;
356 }
357
358 bss_size = round_page(a_out->a_bss);
359
360 /* Check various fields in header for validity/bounds. */
361 if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
362 error = ENOEXEC;
363 goto cleanup;
364 }
365
366 /* text + data can't exceed file size */
367 if (a_out->a_data + a_out->a_text > attr.va_size) {
368 error = EFAULT;
369 goto cleanup;
370 }
371
372 /*
373 * text/data/bss must not exceed limits
374 * XXX - this is not complete. it should check current usage PLUS
375 * the resources needed by this library.
376 */
377 PROC_LOCK(td->td_proc);
378 if (a_out->a_text > maxtsiz ||
379 a_out->a_data + bss_size > lim_cur(td->td_proc, RLIMIT_DATA)) {
380 PROC_UNLOCK(td->td_proc);
381 error = ENOMEM;
382 goto cleanup;
383 }
384 PROC_UNLOCK(td->td_proc);
385
386 mp_fixme("Unlocked vflags access.");
387 /* prevent more writers */
388 vp->v_vflag |= VV_TEXT;
389
390 /*
391 * Check if file_offset page aligned. Currently we cannot handle
392 * misalinged file offsets, and so we read in the entire image
393 * (what a waste).
394 */
395 if (file_offset & PAGE_MASK) {
396 #ifdef DEBUG
397 printf("uselib: Non page aligned binary %lu\n", file_offset);
398 #endif
399 /* Map text+data read/write/execute */
400
401 /* a_entry is the load address and is page aligned */
402 vmaddr = trunc_page(a_out->a_entry);
403
404 /* get anon user mapping, read+write+execute */
405 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
406 &vmaddr, a_out->a_text + a_out->a_data, FALSE, VM_PROT_ALL,
407 VM_PROT_ALL, 0);
408 if (error)
409 goto cleanup;
410
411 /* map file into kernel_map */
412 error = vm_mmap(kernel_map, &buffer,
413 round_page(a_out->a_text + a_out->a_data + file_offset),
414 VM_PROT_READ, VM_PROT_READ, 0, OBJT_VNODE, vp,
415 trunc_page(file_offset));
416 if (error)
417 goto cleanup;
418
419 /* copy from kernel VM space to user space */
420 error = copyout(PTRIN(buffer + file_offset),
421 (void *)vmaddr, a_out->a_text + a_out->a_data);
422
423 /* release temporary kernel space */
424 vm_map_remove(kernel_map, buffer, buffer +
425 round_page(a_out->a_text + a_out->a_data + file_offset));
426
427 if (error)
428 goto cleanup;
429 } else {
430 #ifdef DEBUG
431 printf("uselib: Page aligned binary %lu\n", file_offset);
432 #endif
433 /*
434 * for QMAGIC, a_entry is 20 bytes beyond the load address
435 * to skip the executable header
436 */
437 vmaddr = trunc_page(a_out->a_entry);
438
439 /*
440 * Map it all into the process's space as a single
441 * copy-on-write "data" segment.
442 */
443 error = vm_mmap(&td->td_proc->p_vmspace->vm_map, &vmaddr,
444 a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL,
445 MAP_PRIVATE | MAP_FIXED, OBJT_VNODE, vp, file_offset);
446 if (error)
447 goto cleanup;
448 }
449 #ifdef DEBUG
450 printf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long *)vmaddr)[0],
451 ((long *)vmaddr)[1]);
452 #endif
453 if (bss_size != 0) {
454 /* Calculate BSS start address */
455 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text +
456 a_out->a_data;
457
458 /* allocate some 'anon' space */
459 error = vm_map_find(&td->td_proc->p_vmspace->vm_map, NULL, 0,
460 &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
461 if (error)
462 goto cleanup;
463 }
464
465 cleanup:
466 /* Unlock vnode if needed */
467 if (locked)
468 VOP_UNLOCK(vp, 0, td);
469
470 /* Release the kernel mapping. */
471 if (a_out)
472 vm_map_remove(kernel_map, (vm_offset_t)a_out,
473 (vm_offset_t)a_out + PAGE_SIZE);
474
475 return error;
476 }
477
478 #endif /* __i386__ || __alpha__ */
479
480 int
481 linux_select(struct thread *td, struct linux_select_args *args)
482 {
483 l_timeval ltv;
484 struct timeval tv0, tv1, utv, *tvp;
485 int error;
486
487 #ifdef DEBUG
488 if (ldebug(select))
489 printf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds,
490 (void *)args->readfds, (void *)args->writefds,
491 (void *)args->exceptfds, (void *)args->timeout);
492 #endif
493
494 /*
495 * Store current time for computation of the amount of
496 * time left.
497 */
498 if (args->timeout) {
499 if ((error = copyin(args->timeout, <v, sizeof(ltv))))
500 goto select_out;
501 utv.tv_sec = ltv.tv_sec;
502 utv.tv_usec = ltv.tv_usec;
503 #ifdef DEBUG
504 if (ldebug(select))
505 printf(LMSG("incoming timeout (%jd/%ld)"),
506 (intmax_t)utv.tv_sec, utv.tv_usec);
507 #endif
508
509 if (itimerfix(&utv)) {
510 /*
511 * The timeval was invalid. Convert it to something
512 * valid that will act as it does under Linux.
513 */
514 utv.tv_sec += utv.tv_usec / 1000000;
515 utv.tv_usec %= 1000000;
516 if (utv.tv_usec < 0) {
517 utv.tv_sec -= 1;
518 utv.tv_usec += 1000000;
519 }
520 if (utv.tv_sec < 0)
521 timevalclear(&utv);
522 }
523 microtime(&tv0);
524 tvp = &utv;
525 } else
526 tvp = NULL;
527
528 error = kern_select(td, args->nfds, args->readfds, args->writefds,
529 args->exceptfds, tvp);
530
531 #ifdef DEBUG
532 if (ldebug(select))
533 printf(LMSG("real select returns %d"), error);
534 #endif
535 if (error) {
536 /*
537 * See fs/select.c in the Linux kernel. Without this,
538 * Maelstrom doesn't work.
539 */
540 if (error == ERESTART)
541 error = EINTR;
542 goto select_out;
543 }
544
545 if (args->timeout) {
546 if (td->td_retval[0]) {
547 /*
548 * Compute how much time was left of the timeout,
549 * by subtracting the current time and the time
550 * before we started the call, and subtracting
551 * that result from the user-supplied value.
552 */
553 microtime(&tv1);
554 timevalsub(&tv1, &tv0);
555 timevalsub(&utv, &tv1);
556 if (utv.tv_sec < 0)
557 timevalclear(&utv);
558 } else
559 timevalclear(&utv);
560 #ifdef DEBUG
561 if (ldebug(select))
562 printf(LMSG("outgoing timeout (%jd/%ld)"),
563 (intmax_t)utv.tv_sec, utv.tv_usec);
564 #endif
565 ltv.tv_sec = utv.tv_sec;
566 ltv.tv_usec = utv.tv_usec;
567 if ((error = copyout(<v, args->timeout, sizeof(ltv))))
568 goto select_out;
569 }
570
571 select_out:
572 #ifdef DEBUG
573 if (ldebug(select))
574 printf(LMSG("select_out -> %d"), error);
575 #endif
576 return error;
577 }
578
579 int
580 linux_mremap(struct thread *td, struct linux_mremap_args *args)
581 {
582 struct munmap_args /* {
583 void *addr;
584 size_t len;
585 } */ bsd_args;
586 int error = 0;
587
588 #ifdef DEBUG
589 if (ldebug(mremap))
590 printf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"),
591 (void *)(uintptr_t)args->addr,
592 (unsigned long)args->old_len,
593 (unsigned long)args->new_len,
594 (unsigned long)args->flags);
595 #endif
596 args->new_len = round_page(args->new_len);
597 args->old_len = round_page(args->old_len);
598
599 if (args->new_len > args->old_len) {
600 td->td_retval[0] = 0;
601 return ENOMEM;
602 }
603
604 if (args->new_len < args->old_len) {
605 bsd_args.addr =
606 (caddr_t)((uintptr_t)args->addr + args->new_len);
607 bsd_args.len = args->old_len - args->new_len;
608 error = munmap(td, &bsd_args);
609 }
610
611 td->td_retval[0] = error ? 0 : (uintptr_t)args->addr;
612 return error;
613 }
614
615 #define LINUX_MS_ASYNC 0x0001
616 #define LINUX_MS_INVALIDATE 0x0002
617 #define LINUX_MS_SYNC 0x0004
618
619 int
620 linux_msync(struct thread *td, struct linux_msync_args *args)
621 {
622 struct msync_args bsd_args;
623
624 bsd_args.addr = (caddr_t)(uintptr_t)args->addr;
625 bsd_args.len = (uintptr_t)args->len;
626 bsd_args.flags = args->fl & ~LINUX_MS_SYNC;
627
628 return msync(td, &bsd_args);
629 }
630
631 #ifndef __alpha__
632 int
633 linux_time(struct thread *td, struct linux_time_args *args)
634 {
635 struct timeval tv;
636 l_time_t tm;
637 int error;
638
639 #ifdef DEBUG
640 if (ldebug(time))
641 printf(ARGS(time, "*"));
642 #endif
643
644 microtime(&tv);
645 tm = tv.tv_sec;
646 if (args->tm && (error = copyout(&tm, args->tm, sizeof(tm))))
647 return error;
648 td->td_retval[0] = tm;
649 return 0;
650 }
651 #endif /*!__alpha__*/
652
653 struct l_times_argv {
654 l_long tms_utime;
655 l_long tms_stime;
656 l_long tms_cutime;
657 l_long tms_cstime;
658 };
659
660 #ifdef __alpha__
661 #define CLK_TCK 1024 /* Linux uses 1024 on alpha */
662 #else
663 #define CLK_TCK 100 /* Linux uses 100 */
664 #endif
665
666 #define CONVTCK(r) (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
667
668 int
669 linux_times(struct thread *td, struct linux_times_args *args)
670 {
671 struct timeval tv, utime, stime, cutime, cstime;
672 struct l_times_argv tms;
673 struct proc *p;
674 int error;
675
676 #ifdef DEBUG
677 if (ldebug(times))
678 printf(ARGS(times, "*"));
679 #endif
680
681 if (args->buf != NULL) {
682 p = td->td_proc;
683 PROC_LOCK(p);
684 calcru(p, &utime, &stime);
685 calccru(p, &cutime, &cstime);
686 PROC_UNLOCK(p);
687
688 tms.tms_utime = CONVTCK(utime);
689 tms.tms_stime = CONVTCK(stime);
690
691 tms.tms_cutime = CONVTCK(cutime);
692 tms.tms_cstime = CONVTCK(cstime);
693
694 if ((error = copyout(&tms, args->buf, sizeof(tms))))
695 return error;
696 }
697
698 microuptime(&tv);
699 td->td_retval[0] = (int)CONVTCK(tv);
700 return 0;
701 }
702
703 int
704 linux_newuname(struct thread *td, struct linux_newuname_args *args)
705 {
706 struct l_new_utsname utsname;
707 char osname[LINUX_MAX_UTSNAME];
708 char osrelease[LINUX_MAX_UTSNAME];
709 char *p;
710
711 #ifdef DEBUG
712 if (ldebug(newuname))
713 printf(ARGS(newuname, "*"));
714 #endif
715
716 linux_get_osname(td, osname);
717 linux_get_osrelease(td, osrelease);
718
719 bzero(&utsname, sizeof(utsname));
720 strlcpy(utsname.sysname, osname, LINUX_MAX_UTSNAME);
721 getcredhostname(td->td_ucred, utsname.nodename, LINUX_MAX_UTSNAME);
722 strlcpy(utsname.release, osrelease, LINUX_MAX_UTSNAME);
723 strlcpy(utsname.version, version, LINUX_MAX_UTSNAME);
724 for (p = utsname.version; *p != '\0'; ++p)
725 if (*p == '\n') {
726 *p = '\0';
727 break;
728 }
729 #ifdef __i386__
730 {
731 const char *class;
732
733 switch (cpu_class) {
734 case CPUCLASS_686:
735 class = "i686";
736 break;
737 case CPUCLASS_586:
738 class = "i586";
739 break;
740 case CPUCLASS_486:
741 class = "i486";
742 break;
743 default:
744 class = "i386";
745 }
746 strlcpy(utsname.machine, class, LINUX_MAX_UTSNAME);
747 }
748 #elif defined(__amd64__) /* XXX: Linux can change 'personality'. */
749 #ifdef COMPAT_LINUX32
750 strlcpy(utsname.machine, "i686", LINUX_MAX_UTSNAME);
751 #else
752 strlcpy(utsname.machine, "x86_64", LINUX_MAX_UTSNAME);
753 #endif /* COMPAT_LINUX32 */
754 #else /* something other than i386 or amd64 - assume we and Linux agree */
755 strlcpy(utsname.machine, machine, LINUX_MAX_UTSNAME);
756 #endif /* __i386__ */
757 strlcpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME);
758
759 return (copyout(&utsname, args->buf, sizeof(utsname)));
760 }
761
762 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
763 struct l_utimbuf {
764 l_time_t l_actime;
765 l_time_t l_modtime;
766 };
767
768 int
769 linux_utime(struct thread *td, struct linux_utime_args *args)
770 {
771 struct timeval tv[2], *tvp;
772 struct l_utimbuf lut;
773 char *fname;
774 int error;
775
776 LCONVPATHEXIST(td, args->fname, &fname);
777
778 #ifdef DEBUG
779 if (ldebug(utime))
780 printf(ARGS(utime, "%s, *"), fname);
781 #endif
782
783 if (args->times) {
784 if ((error = copyin(args->times, &lut, sizeof lut))) {
785 LFREEPATH(fname);
786 return error;
787 }
788 tv[0].tv_sec = lut.l_actime;
789 tv[0].tv_usec = 0;
790 tv[1].tv_sec = lut.l_modtime;
791 tv[1].tv_usec = 0;
792 tvp = tv;
793 } else
794 tvp = NULL;
795
796 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
797 LFREEPATH(fname);
798 return (error);
799 }
800
801 int
802 linux_utimes(struct thread *td, struct linux_utimes_args *args)
803 {
804 l_timeval ltv[2];
805 struct timeval tv[2], *tvp = NULL;
806 char *fname;
807 int error;
808
809 LCONVPATHEXIST(td, args->fname, &fname);
810
811 #ifdef DEBUG
812 if (ldebug(utimes))
813 printf(ARGS(utimes, "%s, *"), fname);
814 #endif
815
816 if (args->tptr != NULL) {
817 if ((error = copyin(args->tptr, ltv, sizeof ltv))) {
818 LFREEPATH(fname);
819 return (error);
820 }
821 tv[0].tv_sec = ltv[0].tv_sec;
822 tv[0].tv_usec = ltv[0].tv_usec;
823 tv[1].tv_sec = ltv[1].tv_sec;
824 tv[1].tv_usec = ltv[1].tv_usec;
825 tvp = tv;
826 }
827
828 error = kern_utimes(td, fname, UIO_SYSSPACE, tvp, UIO_SYSSPACE);
829 LFREEPATH(fname);
830 return (error);
831 }
832 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
833
834 #define __WCLONE 0x80000000
835
836 #ifndef __alpha__
837 int
838 linux_waitpid(struct thread *td, struct linux_waitpid_args *args)
839 {
840 int error, options, tmpstat;
841
842 #ifdef DEBUG
843 if (ldebug(waitpid))
844 printf(ARGS(waitpid, "%d, %p, %d"),
845 args->pid, (void *)args->status, args->options);
846 #endif
847 /*
848 * this is necessary because the test in kern_wait doesn't work
849 * because we mess with the options here
850 */
851 if (args->options & ~(WUNTRACED | WNOHANG | WCONTINUED | __WCLONE))
852 return (EINVAL);
853
854 options = (args->options & (WNOHANG | WUNTRACED));
855 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
856 if (args->options & __WCLONE)
857 options |= WLINUXCLONE;
858
859 error = kern_wait(td, args->pid, &tmpstat, options, NULL);
860 if (error)
861 return error;
862
863 if (args->status) {
864 tmpstat &= 0xffff;
865 if (WIFSIGNALED(tmpstat))
866 tmpstat = (tmpstat & 0xffffff80) |
867 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
868 else if (WIFSTOPPED(tmpstat))
869 tmpstat = (tmpstat & 0xffff00ff) |
870 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
871 return copyout(&tmpstat, args->status, sizeof(int));
872 }
873
874 return 0;
875 }
876 #endif /*!__alpha__*/
877
878 int
879 linux_wait4(struct thread *td, struct linux_wait4_args *args)
880 {
881 int error, options, tmpstat;
882 struct rusage ru, *rup;
883 struct proc *p;
884
885 #ifdef DEBUG
886 if (ldebug(wait4))
887 printf(ARGS(wait4, "%d, %p, %d, %p"),
888 args->pid, (void *)args->status, args->options,
889 (void *)args->rusage);
890 #endif
891
892 options = (args->options & (WNOHANG | WUNTRACED));
893 /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
894 if (args->options & __WCLONE)
895 options |= WLINUXCLONE;
896
897 if (args->rusage != NULL)
898 rup = &ru;
899 else
900 rup = NULL;
901 error = kern_wait(td, args->pid, &tmpstat, options, rup);
902 if (error)
903 return error;
904
905 p = td->td_proc;
906 PROC_LOCK(p);
907 SIGDELSET(p->p_siglist, SIGCHLD);
908 PROC_UNLOCK(p);
909
910 if (args->status) {
911 tmpstat &= 0xffff;
912 if (WIFSIGNALED(tmpstat))
913 tmpstat = (tmpstat & 0xffffff80) |
914 BSD_TO_LINUX_SIGNAL(WTERMSIG(tmpstat));
915 else if (WIFSTOPPED(tmpstat))
916 tmpstat = (tmpstat & 0xffff00ff) |
917 (BSD_TO_LINUX_SIGNAL(WSTOPSIG(tmpstat)) << 8);
918 error = copyout(&tmpstat, args->status, sizeof(int));
919 }
920 if (args->rusage != NULL && error == 0)
921 error = copyout(&ru, args->rusage, sizeof(ru));
922
923 return (error);
924 }
925
926 int
927 linux_mknod(struct thread *td, struct linux_mknod_args *args)
928 {
929 char *path;
930 int error;
931
932 LCONVPATHCREAT(td, args->path, &path);
933
934 #ifdef DEBUG
935 if (ldebug(mknod))
936 printf(ARGS(mknod, "%s, %d, %d"), path, args->mode, args->dev);
937 #endif
938
939 switch (args->mode & S_IFMT) {
940 case S_IFIFO:
941 case S_IFSOCK:
942 error = kern_mkfifo(td, path, UIO_SYSSPACE, args->mode);
943 break;
944
945 case S_IFCHR:
946 case S_IFBLK:
947 error = kern_mknod(td, path, UIO_SYSSPACE, args->mode,
948 args->dev);
949 break;
950
951 case S_IFDIR:
952 error = EPERM;
953 break;
954
955 case 0:
956 args->mode |= S_IFREG;
957 /* FALLTHROUGH */
958 case S_IFREG:
959 error = kern_open(td, path, UIO_SYSSPACE,
960 O_WRONLY | O_CREAT | O_TRUNC, args->mode);
961 break;
962
963 default:
964 error = EINVAL;
965 break;
966 }
967 LFREEPATH(path);
968 return (error);
969 }
970
971 /*
972 * UGH! This is just about the dumbest idea I've ever heard!!
973 */
974 int
975 linux_personality(struct thread *td, struct linux_personality_args *args)
976 {
977 #ifdef DEBUG
978 if (ldebug(personality))
979 printf(ARGS(personality, "%lu"), (unsigned long)args->per);
980 #endif
981 #ifndef __alpha__
982 if (args->per != 0)
983 return EINVAL;
984 #endif
985
986 /* Yes Jim, it's still a Linux... */
987 td->td_retval[0] = 0;
988 return 0;
989 }
990
991 struct l_itimerval {
992 l_timeval it_interval;
993 l_timeval it_value;
994 };
995
996 #define B2L_ITIMERVAL(bip, lip) \
997 (bip)->it_interval.tv_sec = (lip)->it_interval.tv_sec; \
998 (bip)->it_interval.tv_usec = (lip)->it_interval.tv_usec; \
999 (bip)->it_value.tv_sec = (lip)->it_value.tv_sec; \
1000 (bip)->it_value.tv_usec = (lip)->it_value.tv_usec;
1001
1002 int
1003 linux_setitimer(struct thread *td, struct linux_setitimer_args *uap)
1004 {
1005 int error;
1006 struct l_itimerval ls;
1007 struct itimerval aitv, oitv;
1008
1009 #ifdef DEBUG
1010 if (ldebug(setitimer))
1011 printf(ARGS(setitimer, "%p, %p"),
1012 (void *)uap->itv, (void *)uap->oitv);
1013 #endif
1014
1015 if (uap->itv == NULL) {
1016 uap->itv = uap->oitv;
1017 return (linux_getitimer(td, (struct linux_getitimer_args *)uap));
1018 }
1019
1020 error = copyin(uap->itv, &ls, sizeof(ls));
1021 if (error != 0)
1022 return (error);
1023 B2L_ITIMERVAL(&aitv, &ls);
1024 #ifdef DEBUG
1025 if (ldebug(setitimer)) {
1026 printf("setitimer: value: sec: %jd, usec: %ld\n",
1027 (intmax_t)aitv.it_value.tv_sec, aitv.it_value.tv_usec);
1028 printf("setitimer: interval: sec: %jd, usec: %ld\n",
1029 (intmax_t)aitv.it_interval.tv_sec, aitv.it_interval.tv_usec);
1030 }
1031 #endif
1032 error = kern_setitimer(td, uap->which, &aitv, &oitv);
1033 if (error != 0 || uap->oitv == NULL)
1034 return (error);
1035 B2L_ITIMERVAL(&ls, &oitv);
1036
1037 return (copyout(&ls, uap->oitv, sizeof(ls)));
1038 }
1039
1040 int
1041 linux_getitimer(struct thread *td, struct linux_getitimer_args *uap)
1042 {
1043 int error;
1044 struct l_itimerval ls;
1045 struct itimerval aitv;
1046
1047 #ifdef DEBUG
1048 if (ldebug(getitimer))
1049 printf(ARGS(getitimer, "%p"), (void *)uap->itv);
1050 #endif
1051 error = kern_getitimer(td, uap->which, &aitv);
1052 if (error != 0)
1053 return (error);
1054 B2L_ITIMERVAL(&ls, &aitv);
1055 return (copyout(&ls, uap->itv, sizeof(ls)));
1056 }
1057
1058 #ifndef __alpha__
1059 int
1060 linux_nice(struct thread *td, struct linux_nice_args *args)
1061 {
1062 struct setpriority_args bsd_args;
1063
1064 bsd_args.which = PRIO_PROCESS;
1065 bsd_args.who = 0; /* current process */
1066 bsd_args.prio = args->inc;
1067 return setpriority(td, &bsd_args);
1068 }
1069 #endif /*!__alpha__*/
1070
1071 int
1072 linux_setgroups(struct thread *td, struct linux_setgroups_args *args)
1073 {
1074 struct ucred *newcred, *oldcred;
1075 l_gid_t linux_gidset[NGROUPS];
1076 gid_t *bsd_gidset;
1077 int ngrp, error;
1078 struct proc *p;
1079
1080 ngrp = args->gidsetsize;
1081 if (ngrp < 0 || ngrp >= NGROUPS)
1082 return (EINVAL);
1083 error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t));
1084 if (error)
1085 return (error);
1086 newcred = crget();
1087 p = td->td_proc;
1088 PROC_LOCK(p);
1089 oldcred = p->p_ucred;
1090
1091 /*
1092 * cr_groups[0] holds egid. Setting the whole set from
1093 * the supplied set will cause egid to be changed too.
1094 * Keep cr_groups[0] unchanged to prevent that.
1095 */
1096
1097 if ((error = suser_cred(oldcred, SUSER_ALLOWJAIL)) != 0) {
1098 PROC_UNLOCK(p);
1099 crfree(newcred);
1100 return (error);
1101 }
1102
1103 crcopy(newcred, oldcred);
1104 if (ngrp > 0) {
1105 newcred->cr_ngroups = ngrp + 1;
1106
1107 bsd_gidset = newcred->cr_groups;
1108 ngrp--;
1109 while (ngrp >= 0) {
1110 bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
1111 ngrp--;
1112 }
1113 } else
1114 newcred->cr_ngroups = 1;
1115
1116 setsugid(p);
1117 p->p_ucred = newcred;
1118 PROC_UNLOCK(p);
1119 crfree(oldcred);
1120 return (0);
1121 }
1122
1123 int
1124 linux_getgroups(struct thread *td, struct linux_getgroups_args *args)
1125 {
1126 struct ucred *cred;
1127 l_gid_t linux_gidset[NGROUPS];
1128 gid_t *bsd_gidset;
1129 int bsd_gidsetsz, ngrp, error;
1130
1131 cred = td->td_ucred;
1132 bsd_gidset = cred->cr_groups;
1133 bsd_gidsetsz = cred->cr_ngroups - 1;
1134
1135 /*
1136 * cr_groups[0] holds egid. Returning the whole set
1137 * here will cause a duplicate. Exclude cr_groups[0]
1138 * to prevent that.
1139 */
1140
1141 if ((ngrp = args->gidsetsize) == 0) {
1142 td->td_retval[0] = bsd_gidsetsz;
1143 return (0);
1144 }
1145
1146 if (ngrp < bsd_gidsetsz)
1147 return (EINVAL);
1148
1149 ngrp = 0;
1150 while (ngrp < bsd_gidsetsz) {
1151 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
1152 ngrp++;
1153 }
1154
1155 if ((error = copyout(linux_gidset, args->grouplist,
1156 ngrp * sizeof(l_gid_t))))
1157 return (error);
1158
1159 td->td_retval[0] = ngrp;
1160 return (0);
1161 }
1162
1163 #ifndef __alpha__
1164 int
1165 linux_setrlimit(struct thread *td, struct linux_setrlimit_args *args)
1166 {
1167 struct rlimit bsd_rlim;
1168 struct l_rlimit rlim;
1169 u_int which;
1170 int error;
1171
1172 #ifdef DEBUG
1173 if (ldebug(setrlimit))
1174 printf(ARGS(setrlimit, "%d, %p"),
1175 args->resource, (void *)args->rlim);
1176 #endif
1177
1178 if (args->resource >= LINUX_RLIM_NLIMITS)
1179 return (EINVAL);
1180
1181 which = linux_to_bsd_resource[args->resource];
1182 if (which == -1)
1183 return (EINVAL);
1184
1185 error = copyin(args->rlim, &rlim, sizeof(rlim));
1186 if (error)
1187 return (error);
1188
1189 bsd_rlim.rlim_cur = (rlim_t)rlim.rlim_cur;
1190 bsd_rlim.rlim_max = (rlim_t)rlim.rlim_max;
1191 return (kern_setrlimit(td, which, &bsd_rlim));
1192 }
1193
1194 int
1195 linux_old_getrlimit(struct thread *td, struct linux_old_getrlimit_args *args)
1196 {
1197 struct l_rlimit rlim;
1198 struct proc *p = td->td_proc;
1199 struct rlimit bsd_rlim;
1200 u_int which;
1201
1202 #ifdef DEBUG
1203 if (ldebug(old_getrlimit))
1204 printf(ARGS(old_getrlimit, "%d, %p"),
1205 args->resource, (void *)args->rlim);
1206 #endif
1207
1208 if (args->resource >= LINUX_RLIM_NLIMITS)
1209 return (EINVAL);
1210
1211 which = linux_to_bsd_resource[args->resource];
1212 if (which == -1)
1213 return (EINVAL);
1214
1215 PROC_LOCK(p);
1216 lim_rlimit(p, which, &bsd_rlim);
1217 PROC_UNLOCK(p);
1218
1219 #ifdef COMPAT_LINUX32
1220 rlim.rlim_cur = (unsigned int)bsd_rlim.rlim_cur;
1221 if (rlim.rlim_cur == UINT_MAX)
1222 rlim.rlim_cur = INT_MAX;
1223 rlim.rlim_max = (unsigned int)bsd_rlim.rlim_max;
1224 if (rlim.rlim_max == UINT_MAX)
1225 rlim.rlim_max = INT_MAX;
1226 #else
1227 rlim.rlim_cur = (unsigned long)bsd_rlim.rlim_cur;
1228 if (rlim.rlim_cur == ULONG_MAX)
1229 rlim.rlim_cur = LONG_MAX;
1230 rlim.rlim_max = (unsigned long)bsd_rlim.rlim_max;
1231 if (rlim.rlim_max == ULONG_MAX)
1232 rlim.rlim_max = LONG_MAX;
1233 #endif
1234 return (copyout(&rlim, args->rlim, sizeof(rlim)));
1235 }
1236
1237 int
1238 linux_getrlimit(struct thread *td, struct linux_getrlimit_args *args)
1239 {
1240 struct l_rlimit rlim;
1241 struct proc *p = td->td_proc;
1242 struct rlimit bsd_rlim;
1243 u_int which;
1244
1245 #ifdef DEBUG
1246 if (ldebug(getrlimit))
1247 printf(ARGS(getrlimit, "%d, %p"),
1248 args->resource, (void *)args->rlim);
1249 #endif
1250
1251 if (args->resource >= LINUX_RLIM_NLIMITS)
1252 return (EINVAL);
1253
1254 which = linux_to_bsd_resource[args->resource];
1255 if (which == -1)
1256 return (EINVAL);
1257
1258 PROC_LOCK(p);
1259 lim_rlimit(p, which, &bsd_rlim);
1260 PROC_UNLOCK(p);
1261
1262 rlim.rlim_cur = (l_ulong)bsd_rlim.rlim_cur;
1263 rlim.rlim_max = (l_ulong)bsd_rlim.rlim_max;
1264 return (copyout(&rlim, args->rlim, sizeof(rlim)));
1265 }
1266 #endif /*!__alpha__*/
1267
1268 int
1269 linux_sched_setscheduler(struct thread *td,
1270 struct linux_sched_setscheduler_args *args)
1271 {
1272 struct sched_setscheduler_args bsd;
1273
1274 #ifdef DEBUG
1275 if (ldebug(sched_setscheduler))
1276 printf(ARGS(sched_setscheduler, "%d, %d, %p"),
1277 args->pid, args->policy, (const void *)args->param);
1278 #endif
1279
1280 switch (args->policy) {
1281 case LINUX_SCHED_OTHER:
1282 bsd.policy = SCHED_OTHER;
1283 break;
1284 case LINUX_SCHED_FIFO:
1285 bsd.policy = SCHED_FIFO;
1286 break;
1287 case LINUX_SCHED_RR:
1288 bsd.policy = SCHED_RR;
1289 break;
1290 default:
1291 return EINVAL;
1292 }
1293
1294 bsd.pid = args->pid;
1295 bsd.param = (struct sched_param *)args->param;
1296 return sched_setscheduler(td, &bsd);
1297 }
1298
1299 int
1300 linux_sched_getscheduler(struct thread *td,
1301 struct linux_sched_getscheduler_args *args)
1302 {
1303 struct sched_getscheduler_args bsd;
1304 int error;
1305
1306 #ifdef DEBUG
1307 if (ldebug(sched_getscheduler))
1308 printf(ARGS(sched_getscheduler, "%d"), args->pid);
1309 #endif
1310
1311 bsd.pid = args->pid;
1312 error = sched_getscheduler(td, &bsd);
1313
1314 switch (td->td_retval[0]) {
1315 case SCHED_OTHER:
1316 td->td_retval[0] = LINUX_SCHED_OTHER;
1317 break;
1318 case SCHED_FIFO:
1319 td->td_retval[0] = LINUX_SCHED_FIFO;
1320 break;
1321 case SCHED_RR:
1322 td->td_retval[0] = LINUX_SCHED_RR;
1323 break;
1324 }
1325
1326 return error;
1327 }
1328
1329 int
1330 linux_sched_get_priority_max(struct thread *td,
1331 struct linux_sched_get_priority_max_args *args)
1332 {
1333 struct sched_get_priority_max_args bsd;
1334
1335 #ifdef DEBUG
1336 if (ldebug(sched_get_priority_max))
1337 printf(ARGS(sched_get_priority_max, "%d"), args->policy);
1338 #endif
1339
1340 switch (args->policy) {
1341 case LINUX_SCHED_OTHER:
1342 bsd.policy = SCHED_OTHER;
1343 break;
1344 case LINUX_SCHED_FIFO:
1345 bsd.policy = SCHED_FIFO;
1346 break;
1347 case LINUX_SCHED_RR:
1348 bsd.policy = SCHED_RR;
1349 break;
1350 default:
1351 return EINVAL;
1352 }
1353 return sched_get_priority_max(td, &bsd);
1354 }
1355
1356 int
1357 linux_sched_get_priority_min(struct thread *td,
1358 struct linux_sched_get_priority_min_args *args)
1359 {
1360 struct sched_get_priority_min_args bsd;
1361
1362 #ifdef DEBUG
1363 if (ldebug(sched_get_priority_min))
1364 printf(ARGS(sched_get_priority_min, "%d"), args->policy);
1365 #endif
1366
1367 switch (args->policy) {
1368 case LINUX_SCHED_OTHER:
1369 bsd.policy = SCHED_OTHER;
1370 break;
1371 case LINUX_SCHED_FIFO:
1372 bsd.policy = SCHED_FIFO;
1373 break;
1374 case LINUX_SCHED_RR:
1375 bsd.policy = SCHED_RR;
1376 break;
1377 default:
1378 return EINVAL;
1379 }
1380 return sched_get_priority_min(td, &bsd);
1381 }
1382
1383 #define REBOOT_CAD_ON 0x89abcdef
1384 #define REBOOT_CAD_OFF 0
1385 #define REBOOT_HALT 0xcdef0123
1386 #define REBOOT_RESTART 0x01234567
1387 #define REBOOT_RESTART2 0xA1B2C3D4
1388 #define REBOOT_POWEROFF 0x4321FEDC
1389 #define REBOOT_MAGIC1 0xfee1dead
1390 #define REBOOT_MAGIC2 0x28121969
1391 #define REBOOT_MAGIC2A 0x05121996
1392 #define REBOOT_MAGIC2B 0x16041998
1393
1394 int
1395 linux_reboot(struct thread *td, struct linux_reboot_args *args)
1396 {
1397 struct reboot_args bsd_args;
1398
1399 #ifdef DEBUG
1400 if (ldebug(reboot))
1401 printf(ARGS(reboot, "0x%x"), args->cmd);
1402 #endif
1403
1404 if (args->magic1 != REBOOT_MAGIC1)
1405 return EINVAL;
1406
1407 switch (args->magic2) {
1408 case REBOOT_MAGIC2:
1409 case REBOOT_MAGIC2A:
1410 case REBOOT_MAGIC2B:
1411 break;
1412 default:
1413 return EINVAL;
1414 }
1415
1416 switch (args->cmd) {
1417 case REBOOT_CAD_ON:
1418 case REBOOT_CAD_OFF:
1419 return suser(td);
1420 case REBOOT_HALT:
1421 bsd_args.opt = RB_HALT;
1422 break;
1423 case REBOOT_RESTART:
1424 case REBOOT_RESTART2:
1425 bsd_args.opt = 0;
1426 break;
1427 case REBOOT_POWEROFF:
1428 bsd_args.opt = RB_POWEROFF;
1429 break;
1430 default:
1431 return EINVAL;
1432 }
1433 return reboot(td, &bsd_args);
1434 }
1435
1436 #ifndef __alpha__
1437
1438 /*
1439 * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify
1440 * td->td_retval[1] when COMPAT_43 is defined. This
1441 * globbers registers that are assumed to be preserved. The following
1442 * lightweight syscalls fixes this. See also linux_getgid16() and
1443 * linux_getuid16() in linux_uid16.c.
1444 *
1445 * linux_getpid() - MP SAFE
1446 * linux_getgid() - MP SAFE
1447 * linux_getuid() - MP SAFE
1448 */
1449
1450 int
1451 linux_getpid(struct thread *td, struct linux_getpid_args *args)
1452 {
1453
1454 td->td_retval[0] = td->td_proc->p_pid;
1455 return (0);
1456 }
1457
1458 int
1459 linux_getgid(struct thread *td, struct linux_getgid_args *args)
1460 {
1461
1462 td->td_retval[0] = td->td_ucred->cr_rgid;
1463 return (0);
1464 }
1465
1466 int
1467 linux_getuid(struct thread *td, struct linux_getuid_args *args)
1468 {
1469
1470 td->td_retval[0] = td->td_ucred->cr_ruid;
1471 return (0);
1472 }
1473
1474 #endif /*!__alpha__*/
1475
1476 int
1477 linux_getsid(struct thread *td, struct linux_getsid_args *args)
1478 {
1479 struct getsid_args bsd;
1480 bsd.pid = args->pid;
1481 return getsid(td, &bsd);
1482 }
1483
1484 int
1485 linux_nosys(struct thread *td, struct nosys_args *ignore)
1486 {
1487
1488 return (ENOSYS);
1489 }
1490
1491 int
1492 linux_getpriority(struct thread *td, struct linux_getpriority_args *args)
1493 {
1494 struct getpriority_args bsd_args;
1495 int error;
1496
1497 bsd_args.which = args->which;
1498 bsd_args.who = args->who;
1499 error = getpriority(td, &bsd_args);
1500 td->td_retval[0] = 20 - td->td_retval[0];
1501 return error;
1502 }
1503
1504 int
1505 linux_sethostname(struct thread *td, struct linux_sethostname_args *args)
1506 {
1507 int name[2];
1508
1509 #ifdef DEBUG
1510 if (ldebug(sethostname))
1511 printf(ARGS(sethostname, "*, %i"), args->len);
1512 #endif
1513
1514 name[0] = CTL_KERN;
1515 name[1] = KERN_HOSTNAME;
1516 return (userland_sysctl(td, name, 2, 0, 0, 0, args->hostname,
1517 args->len, 0, 0));
1518 }
1519
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