sys/emulation/linux/linux_misc.c

   1 /*-
   2  * Copyright (c) 1994-1995 Søren Schmidt
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer
  10  *    in this position and unchanged.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software withough specific prior written permission
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/sys/compat/linux/linux_misc.c,v 1.85.2.9 2002/09/24 08:11:41 mdodd Exp $
  29  * $DragonFly: src/sys/emulation/linux/linux_misc.c,v 1.39 2007/06/26 19:31:03 dillon Exp $
  30  */
  31
  32 #include "opt_compat.h"
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/fcntl.h>
  37 #include <sys/imgact_aout.h>
  38 #include <sys/kernel.h>
  39 #include <sys/kern_syscall.h>
  40 #include <sys/lock.h>
  41 #include <sys/mman.h>
  42 #include <sys/mount.h>
  43 #include <sys/poll.h>
  44 #include <sys/proc.h>
  45 #include <sys/nlookup.h>
  46 #include <sys/blist.h>
  47 #include <sys/reboot.h>
  48 #include <sys/resourcevar.h>
  49 #include <sys/signalvar.h>
  50 #include <sys/signal2.h>
  51 #include <sys/stat.h>
  52 #include <sys/sysctl.h>
  53 #include <sys/sysproto.h>
  54 #include <sys/time.h>
  55 #include <sys/unistd.h>
  56 #include <sys/vmmeter.h>
  57 #include <sys/vnode.h>
  58 #include <sys/wait.h>
  59 #include <sys/thread2.h>
  60
  61 #include <vm/vm.h>
  62 #include <vm/pmap.h>
  63 #include <vm/vm_kern.h>
  64 #include <vm/vm_map.h>
  65 #include <vm/vm_extern.h>
  66 #include <vm/vm_object.h>
  67 #include <vm/vm_zone.h>
  68 #include <vm/swap_pager.h>
  69
  70 #include <machine/frame.h>
  71 #include <machine/limits.h>
  72 #include <machine/psl.h>
  73 #include <machine/sysarch.h>
  74 #ifdef __i386__
  75 #include <machine/segments.h>
  76 #endif
  77
  78 #include <sys/sched.h>
  79
  80 #include <emulation/linux/linux_sysproto.h>
  81 #include <arch_linux/linux.h>
  82 #include <arch_linux/linux_proto.h>
  83 #include "linux_mib.h"
  84 #include "linux_util.h"
  85
  86 #define BSD_TO_LINUX_SIGNAL(sig)        \
  87         (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig)
  88
  89 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
  90         RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
  91         RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE,
  92         RLIMIT_MEMLOCK, -1
  93 };
  94
  95 struct l_sysinfo {
  96         l_long          uptime;         /* Seconds since boot */
  97         l_ulong         loads[3];       /* 1, 5, and 15 minute load averages */
  98         l_ulong         totalram;       /* Total usable main memory size */
  99         l_ulong         freeram;        /* Available memory size */
 100         l_ulong         sharedram;      /* Amount of shared memory */
 101         l_ulong         bufferram;      /* Memory used by buffers */
 102         l_ulong         totalswap;      /* Total swap space size */
 103         l_ulong         freeswap;       /* swap space still available */
 104         l_ushort        procs;          /* Number of current processes */
 105         char            _f[22];         /* Pads structure to 64 bytes */
 106 };
 107
 108 int
 109 sys_linux_sysinfo(struct linux_sysinfo_args *args)
 110 {
 111         struct l_sysinfo sysinfo;
 112         vm_object_t object;
 113         int i;
 114         struct timespec ts;
 115
 116         /* Uptime is copied out of print_uptime() in kern_shutdown.c */
 117         getnanouptime(&ts);
 118         i = 0;
 119         if (ts.tv_sec >= 86400) {
 120                 ts.tv_sec %= 86400;
 121                 i = 1;
 122         }
 123         if (i || ts.tv_sec >= 3600) {
 124                 ts.tv_sec %= 3600;
 125                 i = 1;
 126         }
 127         if (i || ts.tv_sec >= 60) {
 128                 ts.tv_sec %= 60;
 129                 i = 1;
 130         }
 131         sysinfo.uptime=ts.tv_sec;
 132
 133         /* Use the information from the mib to get our load averages */
 134         for (i = 0; i < 3; i++)
 135                 sysinfo.loads[i] = averunnable.ldavg[i];
 136
 137         sysinfo.totalram = Maxmem * PAGE_SIZE;
 138         sysinfo.freeram = sysinfo.totalram - vmstats.v_wire_count * PAGE_SIZE;
 139
 140         sysinfo.sharedram = 0;
 141         for (object = TAILQ_FIRST(&vm_object_list); object != NULL;
 142              object = TAILQ_NEXT(object, object_list))
 143                 if (object->shadow_count > 1)
 144                         sysinfo.sharedram += object->resident_page_count;
 145
 146         sysinfo.sharedram *= PAGE_SIZE;
 147         sysinfo.bufferram = 0;
 148
 149         if (swapblist == NULL) {
 150                 sysinfo.totalswap= 0;
 151                 sysinfo.freeswap = 0;
 152         } else {
 153                 sysinfo.totalswap = swapblist->bl_blocks * 1024;
 154                 sysinfo.freeswap = swapblist->bl_root->u.bmu_avail * PAGE_SIZE;
 155         }
 156
 157         sysinfo.procs = 20; /* Hack */
 158
 159         return copyout(&sysinfo, (caddr_t)args->info, sizeof(sysinfo));
 160 }
 161
 162 int
 163 sys_linux_alarm(struct linux_alarm_args *args)
 164 {
 165         struct thread *td = curthread;
 166         struct proc *p = td->td_proc;
 167         struct itimerval it, old_it;
 168         struct timeval tv;
 169
 170         KKASSERT(p);
 171
 172 #ifdef DEBUG
 173         if (ldebug(alarm))
 174                 kprintf(ARGS(alarm, "%u"), args->secs);
 175 #endif
 176
 177         if (args->secs > 100000000)
 178                 return EINVAL;
 179
 180         it.it_value.tv_sec = (long)args->secs;
 181         it.it_value.tv_usec = 0;
 182         it.it_interval.tv_sec = 0;
 183         it.it_interval.tv_usec = 0;
 184         crit_enter();
 185         old_it = p->p_realtimer;
 186         getmicrouptime(&tv);
 187         if (timevalisset(&old_it.it_value))
 188                 callout_stop(&p->p_ithandle);
 189         if (it.it_value.tv_sec != 0) {
 190                 callout_reset(&p->p_ithandle, tvtohz_high(&it.it_value),
 191                              realitexpire, p);
 192                 timevaladd(&it.it_value, &tv);
 193         }
 194         p->p_realtimer = it;
 195         crit_exit();
 196         if (timevalcmp(&old_it.it_value, &tv, >)) {
 197                 timevalsub(&old_it.it_value, &tv);
 198                 if (old_it.it_value.tv_usec != 0)
 199                         old_it.it_value.tv_sec++;
 200                 args->sysmsg_result = old_it.it_value.tv_sec;
 201         }
 202         return 0;
 203 }
 204
 205 int
 206 sys_linux_brk(struct linux_brk_args *args)
 207 {
 208         struct thread *td = curthread;
 209         struct proc *p = td->td_proc;
 210         struct vmspace *vm;
 211         vm_offset_t new, old;
 212         struct obreak_args bsd_args;
 213
 214         KKASSERT(p);
 215         vm = p->p_vmspace;
 216 #ifdef DEBUG
 217         if (ldebug(brk))
 218                 kprintf(ARGS(brk, "%p"), (void *)args->dsend);
 219 #endif
 220         old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
 221         new = (vm_offset_t)args->dsend;
 222         bsd_args.sysmsg_result = 0;
 223         bsd_args.nsize = (char *) new;
 224         bsd_args.sysmsg_result = 0;
 225         if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(&bsd_args))
 226                 args->sysmsg_result = (long)new;
 227         else
 228                 args->sysmsg_result = (long)old;
 229
 230         return 0;
 231 }
 232
 233 int
 234 sys_linux_uselib(struct linux_uselib_args *args)
 235 {
 236         struct thread *td = curthread;
 237         struct proc *p;
 238         struct nlookupdata nd;
 239         struct vnode *vp;
 240         struct exec *a_out;
 241         struct vattr attr;
 242         vm_offset_t vmaddr;
 243         unsigned long file_offset;
 244         vm_offset_t buffer;
 245         unsigned long bss_size;
 246         int error;
 247         int locked;
 248         char *path;
 249
 250         KKASSERT(td->td_proc);
 251         p = td->td_proc;
 252
 253         error = linux_copyin_path(args->library, &path, LINUX_PATH_EXISTS);
 254         if (error)
 255                 return (error);
 256 #ifdef DEBUG
 257         if (ldebug(uselib))
 258                 kprintf(ARGS(uselib, "%s"), path);
 259 #endif
 260
 261         a_out = NULL;
 262         locked = 0;
 263         vp = NULL;
 264
 265         error = nlookup_init(&nd, path, UIO_SYSSPACE, NLC_FOLLOW);
 266         if (error == 0)
 267                 error = nlookup(&nd);
 268         if (error == 0)
 269                 error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp);
 270         if (error)
 271                 goto cleanup;
 272         /*
 273          * From here on down, we have a locked vnode that must be unlocked.
 274          */
 275         locked = 1;
 276
 277         /* Writable? */
 278         if (vp->v_writecount) {
 279                 error = ETXTBSY;
 280                 goto cleanup;
 281         }
 282
 283         /* Executable? */
 284         error = VOP_GETATTR(vp, &attr);
 285         if (error)
 286                 goto cleanup;
 287
 288         if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
 289             ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) {
 290                 error = ENOEXEC;
 291                 goto cleanup;
 292         }
 293
 294         /* Sensible size? */
 295         if (attr.va_size == 0) {
 296                 error = ENOEXEC;
 297                 goto cleanup;
 298         }
 299
 300         /* Can we access it? */
 301         error = VOP_ACCESS(vp, VEXEC, p->p_ucred);
 302         if (error)
 303                 goto cleanup;
 304
 305         error = VOP_OPEN(vp, FREAD, p->p_ucred, NULL);
 306         if (error)
 307                 goto cleanup;
 308
 309         /*
 310          * Lock no longer needed
 311          */
 312         vn_unlock(vp);
 313         locked = 0;
 314
 315         /* Pull in executable header into kernel_map */
 316         error = vm_mmap(&kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE,
 317             VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 0);
 318         if (error)
 319                 goto cleanup;
 320
 321         /* Is it a Linux binary ? */
 322         if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
 323                 error = ENOEXEC;
 324                 goto cleanup;
 325         }
 326
 327         /*
 328          * While we are here, we should REALLY do some more checks
 329          */
 330
 331         /* Set file/virtual offset based on a.out variant. */
 332         switch ((int)(a_out->a_magic & 0xffff)) {
 333         case 0413:      /* ZMAGIC */
 334                 file_offset = 1024;
 335                 break;
 336         case 0314:      /* QMAGIC */
 337                 file_offset = 0;
 338                 break;
 339         default:
 340                 error = ENOEXEC;
 341                 goto cleanup;
 342         }
 343
 344         bss_size = round_page(a_out->a_bss);
 345
 346         /* Check various fields in header for validity/bounds. */
 347         if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
 348                 error = ENOEXEC;
 349                 goto cleanup;
 350         }
 351
 352         /* text + data can't exceed file size */
 353         if (a_out->a_data + a_out->a_text > attr.va_size) {
 354                 error = EFAULT;
 355                 goto cleanup;
 356         }
 357
 358         /*
 359          * text/data/bss must not exceed limits
 360          * XXX - this is not complete. it should check current usage PLUS
 361          * the resources needed by this library.
 362          */
 363         if (a_out->a_text > maxtsiz ||
 364             a_out->a_data + bss_size > p->p_rlimit[RLIMIT_DATA].rlim_cur) {
 365                 error = ENOMEM;
 366                 goto cleanup;
 367         }
 368
 369         /* prevent more writers */
 370         vp->v_flag |= VTEXT;
 371
 372         /*
 373          * Check if file_offset page aligned. Currently we cannot handle
 374          * misalinged file offsets, and so we read in the entire image
 375          * (what a waste).
 376          */
 377         if (file_offset & PAGE_MASK) {
 378 #ifdef DEBUG
 379                 kprintf("uselib: Non page aligned binary %lu\n", file_offset);
 380 #endif
 381                 /* Map text+data read/write/execute */
 382
 383                 /* a_entry is the load address and is page aligned */
 384                 vmaddr = trunc_page(a_out->a_entry);
 385
 386                 /* get anon user mapping, read+write+execute */
 387                 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0,
 388                                     &vmaddr, a_out->a_text + a_out->a_data,
 389                                     FALSE,
 390                                     VM_MAPTYPE_NORMAL,
 391                                     VM_PROT_ALL, VM_PROT_ALL,
 392                                     0);
 393                 if (error)
 394                         goto cleanup;
 395
 396                 /* map file into kernel_map */
 397                 error = vm_mmap(&kernel_map, &buffer,
 398                     round_page(a_out->a_text + a_out->a_data + file_offset),
 399                     VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp,
 400                     trunc_page(file_offset));
 401                 if (error)
 402                         goto cleanup;
 403
 404                 /* copy from kernel VM space to user space */
 405                 error = copyout((caddr_t)(uintptr_t)(buffer + file_offset),
 406                     (caddr_t)vmaddr, a_out->a_text + a_out->a_data);
 407
 408                 /* release temporary kernel space */
 409                 vm_map_remove(&kernel_map, buffer, buffer +
 410                     round_page(a_out->a_text + a_out->a_data + file_offset));
 411
 412                 if (error)
 413                         goto cleanup;
 414         } else {
 415 #ifdef DEBUG
 416                 kprintf("uselib: Page aligned binary %lu\n", file_offset);
 417 #endif
 418                 /*
 419                  * for QMAGIC, a_entry is 20 bytes beyond the load address
 420                  * to skip the executable header
 421                  */
 422                 vmaddr = trunc_page(a_out->a_entry);
 423
 424                 /*
 425                  * Map it all into the process's space as a single
 426                  * copy-on-write "data" segment.
 427                  */
 428                 error = vm_mmap(&p->p_vmspace->vm_map, &vmaddr,
 429                     a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL,
 430                     MAP_PRIVATE | MAP_FIXED, (caddr_t)vp, file_offset);
 431                 if (error)
 432                         goto cleanup;
 433         }
 434 #ifdef DEBUG
 435         kprintf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long*)vmaddr)[0],
 436             ((long*)vmaddr)[1]);
 437 #endif
 438         if (bss_size != 0) {
 439                 /* Calculate BSS start address */
 440                 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text +
 441                     a_out->a_data;
 442
 443                 /* allocate some 'anon' space */
 444                 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0,
 445                                     &vmaddr, bss_size,
 446                                     FALSE,
 447                                     VM_MAPTYPE_NORMAL,
 448                                     VM_PROT_ALL, VM_PROT_ALL,
 449                                     0);
 450                 if (error)
 451                         goto cleanup;
 452         }
 453
 454 cleanup:
 455         /* Unlock/release vnode */
 456         if (vp) {
 457                 if (locked)
 458                         vn_unlock(vp);
 459                 vrele(vp);
 460         }
 461         /* Release the kernel mapping. */
 462         if (a_out) {
 463                 vm_map_remove(&kernel_map, (vm_offset_t)a_out,
 464                     (vm_offset_t)a_out + PAGE_SIZE);
 465         }
 466         nlookup_done(&nd);
 467         linux_free_path(&path);
 468         return (error);
 469 }
 470
 471 int
 472 sys_linux_select(struct linux_select_args *args)
 473 {
 474         struct select_args bsa;
 475         struct timeval tv0, tv1, utv, *tvp;
 476         caddr_t sg;
 477         int error;
 478
 479 #ifdef DEBUG
 480         if (ldebug(select))
 481                 kprintf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds,
 482                     (void *)args->readfds, (void *)args->writefds,
 483                     (void *)args->exceptfds, (void *)args->timeout);
 484 #endif
 485
 486         error = 0;
 487         bsa.sysmsg_result = 0;
 488         bsa.nd = args->nfds;
 489         bsa.in = args->readfds;
 490         bsa.ou = args->writefds;
 491         bsa.ex = args->exceptfds;
 492         bsa.tv = (struct timeval *)args->timeout;
 493
 494         /*
 495          * Store current time for computation of the amount of
 496          * time left.
 497          */
 498         if (args->timeout) {
 499                 if ((error = copyin((caddr_t)args->timeout, &utv,
 500                     sizeof(utv))))
 501                         goto select_out;
 502 #ifdef DEBUG
 503                 if (ldebug(select))
 504                         kprintf(LMSG("incoming timeout (%ld/%ld)"),
 505                             utv.tv_sec, utv.tv_usec);
 506 #endif
 507
 508                 if (itimerfix(&utv)) {
 509                         /*
 510                          * The timeval was invalid.  Convert it to something
 511                          * valid that will act as it does under Linux.
 512                          */
 513                         sg = stackgap_init();
 514                         tvp = stackgap_alloc(&sg, sizeof(utv));
 515                         utv.tv_sec += utv.tv_usec / 1000000;
 516                         utv.tv_usec %= 1000000;
 517                         if (utv.tv_usec < 0) {
 518                                 utv.tv_sec -= 1;
 519                                 utv.tv_usec += 1000000;
 520                         }
 521                         if (utv.tv_sec < 0)
 522                                 timevalclear(&utv);
 523                         if ((error = copyout(&utv, tvp, sizeof(utv))))
 524                                 goto select_out;
 525                         bsa.tv = tvp;
 526                 }
 527                 microtime(&tv0);
 528         }
 529
 530         error = sys_select(&bsa);
 531         args->sysmsg_result = bsa.sysmsg_result;
 532 #ifdef DEBUG
 533         if (ldebug(select))
 534                 kprintf(LMSG("real select returns %d"), error);
 535 #endif
 536         if (error) {
 537                 /*
 538                  * See fs/select.c in the Linux kernel.  Without this,
 539                  * Maelstrom doesn't work.
 540                  */
 541                 if (error == ERESTART)
 542                         error = EINTR;
 543                 goto select_out;
 544         }
 545
 546         if (args->timeout) {
 547                 if (args->sysmsg_result) {
 548                         /*
 549                          * Compute how much time was left of the timeout,
 550                          * by subtracting the current time and the time
 551                          * before we started the call, and subtracting
 552                          * that result from the user-supplied value.
 553                          */
 554                         microtime(&tv1);
 555                         timevalsub(&tv1, &tv0);
 556                         timevalsub(&utv, &tv1);
 557                         if (utv.tv_sec < 0)
 558                                 timevalclear(&utv);
 559                 } else
 560                         timevalclear(&utv);
 561 #ifdef DEBUG
 562                 if (ldebug(select))
 563                         kprintf(LMSG("outgoing timeout (%ld/%ld)"),
 564                             utv.tv_sec, utv.tv_usec);
 565 #endif
 566                 if ((error = copyout(&utv, (caddr_t)args->timeout,
 567                     sizeof(utv))))
 568                         goto select_out;
 569         }
 570
 571 select_out:
 572 #ifdef DEBUG
 573         if (ldebug(select))
 574                 kprintf(LMSG("select_out -> %d"), error);
 575 #endif
 576         return error;
 577 }
 578
 579 int
 580 sys_linux_mremap(struct linux_mremap_args *args)
 581 {
 582         struct munmap_args bsd_args;
 583         int error = 0;
 584
 585 #ifdef DEBUG
 586         if (ldebug(mremap))
 587                 kprintf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"),
 588                     (void *)args->addr,
 589                     (unsigned long)args->old_len,
 590                     (unsigned long)args->new_len,
 591                     (unsigned long)args->flags);
 592 #endif
 593         args->new_len = round_page(args->new_len);
 594         args->old_len = round_page(args->old_len);
 595
 596         if (args->new_len > args->old_len) {
 597                 args->sysmsg_result = 0;
 598                 return ENOMEM;
 599         }
 600
 601         if (args->new_len < args->old_len) {
 602                 bsd_args.sysmsg_result = 0;
 603                 bsd_args.addr = (caddr_t)(args->addr + args->new_len);
 604                 bsd_args.len = args->old_len - args->new_len;
 605                 error = sys_munmap(&bsd_args);
 606         }
 607
 608         args->sysmsg_resultp = error ? NULL : (void *)args->addr;
 609         return error;
 610 }
 611
 612 #define LINUX_MS_ASYNC          0x0001
 613 #define LINUX_MS_INVALIDATE     0x0002
 614 #define LINUX_MS_SYNC           0x0004
 615
 616 int
 617 sys_linux_msync(struct linux_msync_args *args)
 618 {
 619         struct msync_args bsd_args;
 620         int error;
 621
 622         bsd_args.addr = (caddr_t)args->addr;
 623         bsd_args.len = args->len;
 624         bsd_args.flags = args->fl & ~LINUX_MS_SYNC;
 625         bsd_args.sysmsg_result = 0;
 626
 627         error = sys_msync(&bsd_args);
 628         args->sysmsg_result = bsd_args.sysmsg_result;
 629         return(error);
 630 }
 631
 632 int
 633 sys_linux_time(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                 kprintf(ARGS(time, "*"));
 642 #endif
 643
 644         microtime(&tv);
 645         tm = tv.tv_sec;
 646         if (args->tm && (error = copyout(&tm, (caddr_t)args->tm, sizeof(tm))))
 647                 return error;
 648         args->sysmsg_lresult = tm;
 649         return 0;
 650 }
 651
 652 struct l_times_argv {
 653         l_long          tms_utime;
 654         l_long          tms_stime;
 655         l_long          tms_cutime;
 656         l_long          tms_cstime;
 657 };
 658
 659 #define CLK_TCK 100     /* Linux uses 100 */
 660
 661 #define CONVTCK(r)      (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
 662
 663 int
 664 sys_linux_times(struct linux_times_args *args)
 665 {
 666         struct thread *td = curthread;
 667         struct proc *p = td->td_proc;
 668         struct timeval tv;
 669         struct l_times_argv tms;
 670         struct rusage ru;
 671         int error;
 672
 673         KKASSERT(p);
 674 #ifdef DEBUG
 675         if (ldebug(times))
 676                 kprintf(ARGS(times, "*"));
 677 #endif
 678
 679         calcru_proc(p, &ru);
 680
 681         tms.tms_utime = CONVTCK(ru.ru_utime);
 682         tms.tms_stime = CONVTCK(ru.ru_stime);
 683
 684         tms.tms_cutime = CONVTCK(p->p_cru.ru_utime);
 685         tms.tms_cstime = CONVTCK(p->p_cru.ru_stime);
 686
 687         if ((error = copyout(&tms, (caddr_t)args->buf, sizeof(tms))))
 688                 return error;
 689
 690         microuptime(&tv);
 691         args->sysmsg_result = (int)CONVTCK(tv);
 692         return 0;
 693 }
 694
 695 int
 696 sys_linux_newuname(struct linux_newuname_args *args)
 697 {
 698         struct thread *td = curthread;
 699         struct l_new_utsname utsname;
 700         char *osrelease, *osname;
 701
 702 #ifdef DEBUG
 703         if (ldebug(newuname))
 704                 kprintf(ARGS(newuname, "*"));
 705 #endif
 706
 707         osname = linux_get_osname(td);
 708         osrelease = linux_get_osrelease(td);
 709
 710         bzero(&utsname, sizeof(utsname));
 711         strncpy(utsname.sysname, osname, LINUX_MAX_UTSNAME-1);
 712         strncpy(utsname.nodename, hostname, LINUX_MAX_UTSNAME-1);
 713         strncpy(utsname.release, osrelease, LINUX_MAX_UTSNAME-1);
 714         strncpy(utsname.version, version, LINUX_MAX_UTSNAME-1);
 715         strncpy(utsname.machine, machine, LINUX_MAX_UTSNAME-1);
 716         strncpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME-1);
 717
 718         return (copyout(&utsname, (caddr_t)args->buf, sizeof(utsname)));
 719 }
 720
 721 #if defined(__i386__)
 722 struct l_utimbuf {
 723         l_time_t l_actime;
 724         l_time_t l_modtime;
 725 };
 726
 727 int
 728 sys_linux_utime(struct linux_utime_args *args)
 729 {
 730         struct timeval tv[2];
 731         struct l_utimbuf lut;
 732         struct nlookupdata nd;
 733         char *path;
 734         int error;
 735
 736         error = linux_copyin_path(args->fname, &path, LINUX_PATH_EXISTS);
 737         if (error)
 738                 return (error);
 739 #ifdef DEBUG
 740         if (ldebug(utime))
 741                 kprintf(ARGS(utime, "%s, *"), path);
 742 #endif
 743
 744         if (args->times) {
 745                 error = copyin(args->times, &lut, sizeof(lut));
 746                 if (error)
 747                         goto cleanup;
 748                 tv[0].tv_sec = lut.l_actime;
 749                 tv[0].tv_usec = 0;
 750                 tv[1].tv_sec = lut.l_modtime;
 751                 tv[1].tv_usec = 0;
 752         }
 753         error = nlookup_init(&nd, path, UIO_SYSSPACE, NLC_FOLLOW);
 754         if (error == 0)
 755                 error = kern_utimes(&nd, args->times ? tv : NULL);
 756         nlookup_done(&nd);
 757 cleanup:
 758         linux_free_path(&path);
 759         return (error);
 760 }
 761 #endif /* __i386__ */
 762
 763 #define __WCLONE 0x80000000
 764
 765 int
 766 sys_linux_waitpid(struct linux_waitpid_args *args)
 767 {
 768         int error, options, status;
 769
 770 #ifdef DEBUG
 771         if (ldebug(waitpid))
 772                 kprintf(ARGS(waitpid, "%d, %p, %d"),
 773                     args->pid, (void *)args->status, args->options);
 774 #endif
 775         options = args->options & (WNOHANG | WUNTRACED);
 776         /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
 777         if (args->options & __WCLONE)
 778                 options |= WLINUXCLONE;
 779
 780         error = kern_wait(args->pid, args->status ? &status : NULL, options,
 781             NULL, &args->sysmsg_result);
 782
 783         if (error == 0 && args->status) {
 784                 status &= 0xffff;
 785                 if (WIFSIGNALED(status))
 786                         status = (status & 0xffffff80) |
 787                             BSD_TO_LINUX_SIGNAL(WTERMSIG(status));
 788                 else if (WIFSTOPPED(status))
 789                         status = (status & 0xffff00ff) |
 790                             (BSD_TO_LINUX_SIGNAL(WSTOPSIG(status)) << 8);
 791                 error = copyout(&status, args->status, sizeof(status));
 792         }
 793
 794         return (error);
 795 }
 796
 797 int
 798 sys_linux_wait4(struct linux_wait4_args *args)
 799 {
 800         struct thread *td = curthread;
 801         struct lwp *lp = td->td_lwp;
 802         struct rusage rusage;
 803         int error, options, status;
 804
 805         KKASSERT(lp);
 806
 807 #ifdef DEBUG
 808         if (ldebug(wait4))
 809                 kprintf(ARGS(wait4, "%d, %p, %d, %p"),
 810                     args->pid, (void *)args->status, args->options,
 811                     (void *)args->rusage);
 812 #endif
 813         options = args->options & (WNOHANG | WUNTRACED);
 814         /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
 815         if (args->options & __WCLONE)
 816                 options |= WLINUXCLONE;
 817
 818         error = kern_wait(args->pid, args->status ? &status : NULL, options,
 819             args->rusage ? &rusage : NULL, &args->sysmsg_result);
 820
 821         if (error == 0)
 822                 lwp_delsig(lp, SIGCHLD);
 823
 824         if (error == 0 && args->status) {
 825                 status &= 0xffff;
 826                 if (WIFSIGNALED(status))
 827                         status = (status & 0xffffff80) |
 828                             BSD_TO_LINUX_SIGNAL(WTERMSIG(status));
 829                 else if (WIFSTOPPED(status))
 830                         status = (status & 0xffff00ff) |
 831                             (BSD_TO_LINUX_SIGNAL(WSTOPSIG(status)) << 8);
 832                 error = copyout(&status, args->status, sizeof(status));
 833         }
 834         if (error == 0 && args->rusage)
 835                 error = copyout(&rusage, args->rusage, sizeof(rusage));
 836
 837         return (error);
 838 }
 839
 840 int
 841 sys_linux_mknod(struct linux_mknod_args *args)
 842 {
 843         struct nlookupdata nd;
 844         char *path;
 845         int error;
 846
 847         error = linux_copyin_path(args->path, &path, LINUX_PATH_CREATE);
 848         if (error)
 849                 return (error);
 850 #ifdef DEBUG
 851         if (ldebug(mknod))
 852                 kprintf(ARGS(mknod, "%s, %d, %d"),
 853                     path, args->mode, args->dev);
 854 #endif
 855         error = nlookup_init(&nd, path, UIO_SYSSPACE, 0);
 856         if (error == 0) {
 857                 if (args->mode & S_IFIFO) {
 858                         error = kern_mkfifo(&nd, args->mode);
 859                 } else {
 860                         error = kern_mknod(&nd, args->mode,
 861                                            umajor(args->dev),
 862                                            uminor(args->dev));
 863                 }
 864         }
 865         nlookup_done(&nd);
 866
 867         linux_free_path(&path);
 868         return(error);
 869 }
 870
 871 /*
 872  * UGH! This is just about the dumbest idea I've ever heard!!
 873  */
 874 int
 875 sys_linux_personality(struct linux_personality_args *args)
 876 {
 877 #ifdef DEBUG
 878         if (ldebug(personality))
 879                 kprintf(ARGS(personality, "%d"), args->per);
 880 #endif
 881         if (args->per != 0)
 882                 return EINVAL;
 883
 884         /* Yes Jim, it's still a Linux... */
 885         args->sysmsg_result = 0;
 886         return 0;
 887 }
 888
 889 /*
 890  * Wrappers for get/setitimer for debugging..
 891  */
 892 int
 893 sys_linux_setitimer(struct linux_setitimer_args *args)
 894 {
 895         struct setitimer_args bsa;
 896         struct itimerval foo;
 897         int error;
 898
 899 #ifdef DEBUG
 900         if (ldebug(setitimer))
 901                 kprintf(ARGS(setitimer, "%p, %p"),
 902                     (void *)args->itv, (void *)args->oitv);
 903 #endif
 904         bsa.which = args->which;
 905         bsa.itv = (struct itimerval *)args->itv;
 906         bsa.oitv = (struct itimerval *)args->oitv;
 907         bsa.sysmsg_result = 0;
 908         if (args->itv) {
 909             if ((error = copyin((caddr_t)args->itv, &foo, sizeof(foo))))
 910                 return error;
 911 #ifdef DEBUG
 912             if (ldebug(setitimer)) {
 913                 kprintf("setitimer: value: sec: %ld, usec: %ld\n",
 914                     foo.it_value.tv_sec, foo.it_value.tv_usec);
 915                 kprintf("setitimer: interval: sec: %ld, usec: %ld\n",
 916                     foo.it_interval.tv_sec, foo.it_interval.tv_usec);
 917             }
 918 #endif
 919         }
 920         error = sys_setitimer(&bsa);
 921         args->sysmsg_result = bsa.sysmsg_result;
 922         return(error);
 923 }
 924
 925 int
 926 sys_linux_getitimer(struct linux_getitimer_args *args)
 927 {
 928         struct getitimer_args bsa;
 929         int error;
 930 #ifdef DEBUG
 931         if (ldebug(getitimer))
 932                 kprintf(ARGS(getitimer, "%p"), (void *)args->itv);
 933 #endif
 934         bsa.which = args->which;
 935         bsa.itv = (struct itimerval *)args->itv;
 936         bsa.sysmsg_result = 0;
 937         error = sys_getitimer(&bsa);
 938         args->sysmsg_result = bsa.sysmsg_result;
 939         return(error);
 940 }
 941
 942 int
 943 sys_linux_nice(struct linux_nice_args *args)
 944 {
 945         struct setpriority_args bsd_args;
 946         int error;
 947
 948         bsd_args.which = PRIO_PROCESS;
 949         bsd_args.who = 0;       /* current process */
 950         bsd_args.prio = args->inc;
 951         bsd_args.sysmsg_result = 0;
 952         error = sys_setpriority(&bsd_args);
 953         args->sysmsg_result = bsd_args.sysmsg_result;
 954         return(error);
 955 }
 956
 957 int
 958 sys_linux_setgroups(struct linux_setgroups_args *args)
 959 {
 960         struct thread *td = curthread;
 961         struct proc *p = td->td_proc;
 962         struct ucred *newcred, *oldcred;
 963         l_gid_t linux_gidset[NGROUPS];
 964         gid_t *bsd_gidset;
 965         int ngrp, error;
 966
 967         KKASSERT(p);
 968
 969         ngrp = args->gidsetsize;
 970         oldcred = p->p_ucred;
 971
 972         /*
 973          * cr_groups[0] holds egid. Setting the whole set from
 974          * the supplied set will cause egid to be changed too.
 975          * Keep cr_groups[0] unchanged to prevent that.
 976          */
 977
 978         if ((error = suser_cred(oldcred, PRISON_ROOT)) != 0)
 979                 return (error);
 980
 981         if (ngrp >= NGROUPS)
 982                 return (EINVAL);
 983
 984         newcred = crdup(oldcred);
 985         if (ngrp > 0) {
 986                 error = copyin((caddr_t)args->grouplist, linux_gidset,
 987                                ngrp * sizeof(l_gid_t));
 988                 if (error)
 989                         return (error);
 990
 991                 newcred->cr_ngroups = ngrp + 1;
 992
 993                 bsd_gidset = newcred->cr_groups;
 994                 ngrp--;
 995                 while (ngrp >= 0) {
 996                         bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
 997                         ngrp--;
 998                 }
 999         } else {
1000                 newcred->cr_ngroups = 1;
1001         }
1002
1003         setsugid();
1004         p->p_ucred = newcred;
1005         crfree(oldcred);
1006         return (0);
1007 }
1008
1009 int
1010 sys_linux_getgroups(struct linux_getgroups_args *args)
1011 {
1012         struct thread *td = curthread;
1013         struct proc *p = td->td_proc;
1014         struct ucred *cred;
1015         l_gid_t linux_gidset[NGROUPS];
1016         gid_t *bsd_gidset;
1017         int bsd_gidsetsz, ngrp, error;
1018
1019         KKASSERT(p);
1020
1021         cred = p->p_ucred;
1022         bsd_gidset = cred->cr_groups;
1023         bsd_gidsetsz = cred->cr_ngroups - 1;
1024
1025         /*
1026          * cr_groups[0] holds egid. Returning the whole set
1027          * here will cause a duplicate. Exclude cr_groups[0]
1028          * to prevent that.
1029          */
1030
1031         if ((ngrp = args->gidsetsize) == 0) {
1032                 args->sysmsg_result = bsd_gidsetsz;
1033                 return (0);
1034         }
1035
1036         if (ngrp < bsd_gidsetsz)
1037                 return (EINVAL);
1038
1039         ngrp = 0;
1040         while (ngrp < bsd_gidsetsz) {
1041                 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
1042                 ngrp++;
1043         }
1044
1045         if ((error = copyout(linux_gidset, (caddr_t)args->grouplist,
1046             ngrp * sizeof(l_gid_t))))
1047                 return (error);
1048
1049         args->sysmsg_result = ngrp;
1050         return (0);
1051 }
1052
1053 int
1054 sys_linux_setrlimit(struct linux_setrlimit_args *args)
1055 {
1056         struct l_rlimit linux_rlim;
1057         struct rlimit rlim;
1058         u_int which;
1059         int error;
1060
1061 #ifdef DEBUG
1062         if (ldebug(setrlimit))
1063                 kprintf(ARGS(setrlimit, "%d, %p"),
1064                     args->resource, (void *)args->rlim);
1065 #endif
1066         if (args->resource >= LINUX_RLIM_NLIMITS)
1067                 return (EINVAL);
1068         which = linux_to_bsd_resource[args->resource];
1069         if (which == -1)
1070                 return (EINVAL);
1071
1072         error = copyin(args->rlim, &linux_rlim, sizeof(linux_rlim));
1073         if (error)
1074                 return (error);
1075         rlim.rlim_cur = (rlim_t)linux_rlim.rlim_cur;
1076         rlim.rlim_max = (rlim_t)linux_rlim.rlim_max;
1077
1078         error = kern_setrlimit(which, &rlim);
1079
1080         return(error);
1081 }
1082
1083 int
1084 sys_linux_old_getrlimit(struct linux_old_getrlimit_args *args)
1085 {
1086         struct l_rlimit linux_rlim;
1087         struct rlimit rlim;
1088         u_int which;
1089         int error;
1090
1091 #ifdef DEBUG
1092         if (ldebug(old_getrlimit))
1093                 kprintf(ARGS(old_getrlimit, "%d, %p"),
1094                     args->resource, (void *)args->rlim);
1095 #endif
1096         if (args->resource >= LINUX_RLIM_NLIMITS)
1097                 return (EINVAL);
1098         which = linux_to_bsd_resource[args->resource];
1099         if (which == -1)
1100                 return (EINVAL);
1101
1102         error = kern_getrlimit(which, &rlim);
1103
1104         if (error == 0) {
1105                 linux_rlim.rlim_cur = (l_ulong)rlim.rlim_cur;
1106                 if (linux_rlim.rlim_cur == ULONG_MAX)
1107                         linux_rlim.rlim_cur = LONG_MAX;
1108                 linux_rlim.rlim_max = (l_ulong)rlim.rlim_max;
1109                 if (linux_rlim.rlim_max == ULONG_MAX)
1110                         linux_rlim.rlim_max = LONG_MAX;
1111                 error = copyout(&linux_rlim, args->rlim, sizeof(linux_rlim));
1112         }
1113         return (error);
1114 }
1115
1116 int
1117 sys_linux_getrlimit(struct linux_getrlimit_args *args)
1118 {
1119         struct l_rlimit linux_rlim;
1120         struct rlimit rlim;
1121         u_int which;
1122         int error;
1123
1124 #ifdef DEBUG
1125         if (ldebug(getrlimit))
1126                 kprintf(ARGS(getrlimit, "%d, %p"),
1127                     args->resource, (void *)args->rlim);
1128 #endif
1129         if (args->resource >= LINUX_RLIM_NLIMITS)
1130                 return (EINVAL);
1131         which = linux_to_bsd_resource[args->resource];
1132         if (which == -1)
1133                 return (EINVAL);
1134
1135         error = kern_getrlimit(which, &rlim);
1136
1137         if (error == 0) {
1138                 linux_rlim.rlim_cur = (l_ulong)rlim.rlim_cur;
1139                 linux_rlim.rlim_max = (l_ulong)rlim.rlim_max;
1140                 error = copyout(&linux_rlim, args->rlim, sizeof(linux_rlim));
1141         }
1142         return (error);
1143 }
1144
1145 int
1146 sys_linux_sched_setscheduler(struct linux_sched_setscheduler_args *args)
1147 {
1148         struct sched_setscheduler_args bsd;
1149         int error;
1150
1151 #ifdef DEBUG
1152         if (ldebug(sched_setscheduler))
1153                 kprintf(ARGS(sched_setscheduler, "%d, %d, %p"),
1154                     args->pid, args->policy, (const void *)args->param);
1155 #endif
1156
1157         switch (args->policy) {
1158         case LINUX_SCHED_OTHER:
1159                 bsd.policy = SCHED_OTHER;
1160                 break;
1161         case LINUX_SCHED_FIFO:
1162                 bsd.policy = SCHED_FIFO;
1163                 break;
1164         case LINUX_SCHED_RR:
1165                 bsd.policy = SCHED_RR;
1166                 break;
1167         default:
1168                 return EINVAL;
1169         }
1170
1171         bsd.pid = args->pid;
1172         bsd.param = (struct sched_param *)args->param;
1173         bsd.sysmsg_result = 0;
1174
1175         error = sys_sched_setscheduler(&bsd);
1176         args->sysmsg_result = bsd.sysmsg_result;
1177         return(error);
1178 }
1179
1180 int
1181 sys_linux_sched_getscheduler(struct linux_sched_getscheduler_args *args)
1182 {
1183         struct sched_getscheduler_args bsd;
1184         int error;
1185
1186 #ifdef DEBUG
1187         if (ldebug(sched_getscheduler))
1188                 kprintf(ARGS(sched_getscheduler, "%d"), args->pid);
1189 #endif
1190
1191         bsd.sysmsg_result = 0;
1192         bsd.pid = args->pid;
1193         error = sys_sched_getscheduler(&bsd);
1194         args->sysmsg_result = bsd.sysmsg_result;
1195
1196         switch (args->sysmsg_result) {
1197         case SCHED_OTHER:
1198                 args->sysmsg_result = LINUX_SCHED_OTHER;
1199                 break;
1200         case SCHED_FIFO:
1201                 args->sysmsg_result = LINUX_SCHED_FIFO;
1202                 break;
1203         case SCHED_RR:
1204                 args->sysmsg_result = LINUX_SCHED_RR;
1205                 break;
1206         }
1207         return error;
1208 }
1209
1210 int
1211 sys_linux_sched_get_priority_max(struct linux_sched_get_priority_max_args *args)
1212 {
1213         struct sched_get_priority_max_args bsd;
1214         int error;
1215
1216 #ifdef DEBUG
1217         if (ldebug(sched_get_priority_max))
1218                 kprintf(ARGS(sched_get_priority_max, "%d"), args->policy);
1219 #endif
1220
1221         switch (args->policy) {
1222         case LINUX_SCHED_OTHER:
1223                 bsd.policy = SCHED_OTHER;
1224                 break;
1225         case LINUX_SCHED_FIFO:
1226                 bsd.policy = SCHED_FIFO;
1227                 break;
1228         case LINUX_SCHED_RR:
1229                 bsd.policy = SCHED_RR;
1230                 break;
1231         default:
1232                 return EINVAL;
1233         }
1234         bsd.sysmsg_result = 0;
1235
1236         error = sys_sched_get_priority_max(&bsd);
1237         args->sysmsg_result = bsd.sysmsg_result;
1238         return(error);
1239 }
1240
1241 int
1242 sys_linux_sched_get_priority_min(struct linux_sched_get_priority_min_args *args)
1243 {
1244         struct sched_get_priority_min_args bsd;
1245         int error;
1246
1247 #ifdef DEBUG
1248         if (ldebug(sched_get_priority_min))
1249                 kprintf(ARGS(sched_get_priority_min, "%d"), args->policy);
1250 #endif
1251
1252         switch (args->policy) {
1253         case LINUX_SCHED_OTHER:
1254                 bsd.policy = SCHED_OTHER;
1255                 break;
1256         case LINUX_SCHED_FIFO:
1257                 bsd.policy = SCHED_FIFO;
1258                 break;
1259         case LINUX_SCHED_RR:
1260                 bsd.policy = SCHED_RR;
1261                 break;
1262         default:
1263                 return EINVAL;
1264         }
1265         bsd.sysmsg_result = 0;
1266
1267         error = sys_sched_get_priority_min(&bsd);
1268         args->sysmsg_result = bsd.sysmsg_result;
1269         return(error);
1270 }
1271
1272 #define REBOOT_CAD_ON   0x89abcdef
1273 #define REBOOT_CAD_OFF  0
1274 #define REBOOT_HALT     0xcdef0123
1275
1276 int
1277 sys_linux_reboot(struct linux_reboot_args *args)
1278 {
1279         struct reboot_args bsd_args;
1280         int error;
1281
1282 #ifdef DEBUG
1283         if (ldebug(reboot))
1284                 kprintf(ARGS(reboot, "0x%x"), args->cmd);
1285 #endif
1286         if (args->cmd == REBOOT_CAD_ON || args->cmd == REBOOT_CAD_OFF)
1287                 return (0);
1288         bsd_args.opt = (args->cmd == REBOOT_HALT) ? RB_HALT : 0;
1289         bsd_args.sysmsg_result = 0;
1290
1291         error = sys_reboot(&bsd_args);
1292         args->sysmsg_result = bsd_args.sysmsg_result;
1293         return(error);
1294 }
1295
1296 /*
1297  * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify
1298  * p->p_retval[1] when COMPAT_43 or COMPAT_SUNOS is defined. This
1299  * globbers registers that are assumed to be preserved. The following
1300  * lightweight syscalls fixes this. See also linux_getgid16() and
1301  * linux_getuid16() in linux_uid16.c.
1302  *
1303  * linux_getpid() - MP SAFE
1304  * linux_getgid() - MP SAFE
1305  * linux_getuid() - MP SAFE
1306  */
1307
1308 int
1309 sys_linux_getpid(struct linux_getpid_args *args)
1310 {
1311         struct thread *td = curthread;
1312         struct proc *p = td->td_proc;
1313
1314         KKASSERT(p);
1315
1316         args->sysmsg_result = p->p_pid;
1317         return (0);
1318 }
1319
1320 int
1321 sys_linux_getgid(struct linux_getgid_args *args)
1322 {
1323         struct thread *td = curthread;
1324         struct proc *p = td->td_proc;
1325
1326         KKASSERT(p);
1327
1328         args->sysmsg_result = p->p_ucred->cr_rgid;
1329         return (0);
1330 }
1331
1332 int
1333 sys_linux_getuid(struct linux_getuid_args *args)
1334 {
1335         struct thread *td = curthread;
1336         struct proc *p = td->td_proc;
1337
1338         KKASSERT(p);
1339
1340         args->sysmsg_result = p->p_ucred->cr_ruid;
1341         return (0);
1342 }
1343
1344 int
1345 sys_linux_getsid(struct linux_getsid_args *args)
1346 {
1347         struct getsid_args bsd;
1348         int error;
1349
1350         bsd.sysmsg_result = 0;
1351         bsd.pid = args->pid;
1352         error = sys_getsid(&bsd);
1353         args->sysmsg_result = bsd.sysmsg_result;
1354         return(error);
1355 }
1356
1357 int
1358 linux_nosys(struct nosys_args *args)
1359 {
1360         /* XXX */
1361         return (ENOSYS);
1362 }