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 1.36 2007/02/21 15:46:48 corecode 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/stat.h>
  51 #include <sys/sysctl.h>
  52 #include <sys/sysproto.h>
  53 #include <sys/time.h>
  54 #include <sys/unistd.h>
  55 #include <sys/vmmeter.h>
  56 #include <sys/vnode.h>
  57 #include <sys/wait.h>
  58 #include <sys/thread2.h>
  59
  60 #include <vm/vm.h>
  61 #include <vm/pmap.h>
  62 #include <vm/vm_kern.h>
  63 #include <vm/vm_map.h>
  64 #include <vm/vm_extern.h>
  65 #include <vm/vm_object.h>
  66 #include <vm/vm_zone.h>
  67 #include <vm/swap_pager.h>
  68
  69 #include <machine/frame.h>
  70 #include <machine/limits.h>
  71 #include <machine/psl.h>
  72 #include <machine/sysarch.h>
  73 #ifdef __i386__
  74 #include <machine/segments.h>
  75 #endif
  76
  77 #include <emulation/posix4/sched.h>
  78
  79 #include <emulation/linux/linux_sysproto.h>
  80 #include <arch_linux/linux.h>
  81 #include <arch_linux/linux_proto.h>
  82 #include "linux_mib.h"
  83 #include "linux_util.h"
  84
  85 #define BSD_TO_LINUX_SIGNAL(sig)        \
  86         (((sig) <= LINUX_SIGTBLSZ) ? bsd_to_linux_signal[_SIG_IDX(sig)] : sig)
  87
  88 static unsigned int linux_to_bsd_resource[LINUX_RLIM_NLIMITS] = {
  89         RLIMIT_CPU, RLIMIT_FSIZE, RLIMIT_DATA, RLIMIT_STACK,
  90         RLIMIT_CORE, RLIMIT_RSS, RLIMIT_NPROC, RLIMIT_NOFILE,
  91         RLIMIT_MEMLOCK, -1
  92 };
  93
  94 struct l_sysinfo {
  95         l_long          uptime;         /* Seconds since boot */
  96         l_ulong         loads[3];       /* 1, 5, and 15 minute load averages */
  97         l_ulong         totalram;       /* Total usable main memory size */
  98         l_ulong         freeram;        /* Available memory size */
  99         l_ulong         sharedram;      /* Amount of shared memory */
 100         l_ulong         bufferram;      /* Memory used by buffers */
 101         l_ulong         totalswap;      /* Total swap space size */
 102         l_ulong         freeswap;       /* swap space still available */
 103         l_ushort        procs;          /* Number of current processes */
 104         char            _f[22];         /* Pads structure to 64 bytes */
 105 };
 106
 107 int
 108 sys_linux_sysinfo(struct linux_sysinfo_args *args)
 109 {
 110         struct l_sysinfo sysinfo;
 111         vm_object_t object;
 112         int i;
 113         struct timespec ts;
 114
 115         /* Uptime is copied out of print_uptime() in kern_shutdown.c */
 116         getnanouptime(&ts);
 117         i = 0;
 118         if (ts.tv_sec >= 86400) {
 119                 ts.tv_sec %= 86400;
 120                 i = 1;
 121         }
 122         if (i || ts.tv_sec >= 3600) {
 123                 ts.tv_sec %= 3600;
 124                 i = 1;
 125         }
 126         if (i || ts.tv_sec >= 60) {
 127                 ts.tv_sec %= 60;
 128                 i = 1;
 129         }
 130         sysinfo.uptime=ts.tv_sec;
 131
 132         /* Use the information from the mib to get our load averages */
 133         for (i = 0; i < 3; i++)
 134                 sysinfo.loads[i] = averunnable.ldavg[i];
 135
 136         sysinfo.totalram = Maxmem * PAGE_SIZE;
 137         sysinfo.freeram = sysinfo.totalram - vmstats.v_wire_count * PAGE_SIZE;
 138
 139         sysinfo.sharedram = 0;
 140         for (object = TAILQ_FIRST(&vm_object_list); object != NULL;
 141              object = TAILQ_NEXT(object, object_list))
 142                 if (object->shadow_count > 1)
 143                         sysinfo.sharedram += object->resident_page_count;
 144
 145         sysinfo.sharedram *= PAGE_SIZE;
 146         sysinfo.bufferram = 0;
 147
 148         if (swapblist == NULL) {
 149                 sysinfo.totalswap= 0;
 150                 sysinfo.freeswap = 0;
 151         } else {
 152                 sysinfo.totalswap = swapblist->bl_blocks * 1024;
 153                 sysinfo.freeswap = swapblist->bl_root->u.bmu_avail * PAGE_SIZE;
 154         }
 155
 156         sysinfo.procs = 20; /* Hack */
 157
 158         return copyout(&sysinfo, (caddr_t)args->info, sizeof(sysinfo));
 159 }
 160
 161 int
 162 sys_linux_alarm(struct linux_alarm_args *args)
 163 {
 164         struct thread *td = curthread;
 165         struct proc *p = td->td_proc;
 166         struct itimerval it, old_it;
 167         struct timeval tv;
 168
 169         KKASSERT(p);
 170
 171 #ifdef DEBUG
 172         if (ldebug(alarm))
 173                 kprintf(ARGS(alarm, "%u"), args->secs);
 174 #endif
 175
 176         if (args->secs > 100000000)
 177                 return EINVAL;
 178
 179         it.it_value.tv_sec = (long)args->secs;
 180         it.it_value.tv_usec = 0;
 181         it.it_interval.tv_sec = 0;
 182         it.it_interval.tv_usec = 0;
 183         crit_enter();
 184         old_it = p->p_realtimer;
 185         getmicrouptime(&tv);
 186         if (timevalisset(&old_it.it_value))
 187                 callout_stop(&p->p_ithandle);
 188         if (it.it_value.tv_sec != 0) {
 189                 callout_reset(&p->p_ithandle, tvtohz_high(&it.it_value),
 190                              realitexpire, p);
 191                 timevaladd(&it.it_value, &tv);
 192         }
 193         p->p_realtimer = it;
 194         crit_exit();
 195         if (timevalcmp(&old_it.it_value, &tv, >)) {
 196                 timevalsub(&old_it.it_value, &tv);
 197                 if (old_it.it_value.tv_usec != 0)
 198                         old_it.it_value.tv_sec++;
 199                 args->sysmsg_result = old_it.it_value.tv_sec;
 200         }
 201         return 0;
 202 }
 203
 204 int
 205 sys_linux_brk(struct linux_brk_args *args)
 206 {
 207         struct thread *td = curthread;
 208         struct proc *p = td->td_proc;
 209         struct vmspace *vm;
 210         vm_offset_t new, old;
 211         struct obreak_args bsd_args;
 212
 213         KKASSERT(p);
 214         vm = p->p_vmspace;
 215 #ifdef DEBUG
 216         if (ldebug(brk))
 217                 kprintf(ARGS(brk, "%p"), (void *)args->dsend);
 218 #endif
 219         old = (vm_offset_t)vm->vm_daddr + ctob(vm->vm_dsize);
 220         new = (vm_offset_t)args->dsend;
 221         bsd_args.sysmsg_result = 0;
 222         bsd_args.nsize = (char *) new;
 223         bsd_args.sysmsg_result = 0;
 224         if (((caddr_t)new > vm->vm_daddr) && !sys_obreak(&bsd_args))
 225                 args->sysmsg_result = (long)new;
 226         else
 227                 args->sysmsg_result = (long)old;
 228
 229         return 0;
 230 }
 231
 232 int
 233 sys_linux_uselib(struct linux_uselib_args *args)
 234 {
 235         struct thread *td = curthread;
 236         struct proc *p;
 237         struct nlookupdata nd;
 238         struct vnode *vp;
 239         struct exec *a_out;
 240         struct vattr attr;
 241         vm_offset_t vmaddr;
 242         unsigned long file_offset;
 243         vm_offset_t buffer;
 244         unsigned long bss_size;
 245         int error;
 246         int locked;
 247         char *path;
 248
 249         KKASSERT(td->td_proc);
 250         p = td->td_proc;
 251
 252         error = linux_copyin_path(args->library, &path, LINUX_PATH_EXISTS);
 253         if (error)
 254                 return (error);
 255 #ifdef DEBUG
 256         if (ldebug(uselib))
 257                 kprintf(ARGS(uselib, "%s"), path);
 258 #endif
 259
 260         a_out = NULL;
 261         locked = 0;
 262         vp = NULL;
 263
 264         error = nlookup_init(&nd, path, UIO_SYSSPACE, NLC_FOLLOW);
 265         if (error == 0)
 266                 error = nlookup(&nd);
 267         if (error == 0)
 268                 error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp);
 269         if (error)
 270                 goto cleanup;
 271         /*
 272          * From here on down, we have a locked vnode that must be unlocked.
 273          */
 274         locked = 1;
 275
 276         /* Writable? */
 277         if (vp->v_writecount) {
 278                 error = ETXTBSY;
 279                 goto cleanup;
 280         }
 281
 282         /* Executable? */
 283         error = VOP_GETATTR(vp, &attr);
 284         if (error)
 285                 goto cleanup;
 286
 287         if ((vp->v_mount->mnt_flag & MNT_NOEXEC) ||
 288             ((attr.va_mode & 0111) == 0) || (attr.va_type != VREG)) {
 289                 error = ENOEXEC;
 290                 goto cleanup;
 291         }
 292
 293         /* Sensible size? */
 294         if (attr.va_size == 0) {
 295                 error = ENOEXEC;
 296                 goto cleanup;
 297         }
 298
 299         /* Can we access it? */
 300         error = VOP_ACCESS(vp, VEXEC, p->p_ucred);
 301         if (error)
 302                 goto cleanup;
 303
 304         error = VOP_OPEN(vp, FREAD, p->p_ucred, NULL);
 305         if (error)
 306                 goto cleanup;
 307
 308         /*
 309          * Lock no longer needed
 310          */
 311         vn_unlock(vp);
 312         locked = 0;
 313
 314         /* Pull in executable header into kernel_map */
 315         error = vm_mmap(&kernel_map, (vm_offset_t *)&a_out, PAGE_SIZE,
 316             VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp, 0);
 317         if (error)
 318                 goto cleanup;
 319
 320         /* Is it a Linux binary ? */
 321         if (((a_out->a_magic >> 16) & 0xff) != 0x64) {
 322                 error = ENOEXEC;
 323                 goto cleanup;
 324         }
 325
 326         /*
 327          * While we are here, we should REALLY do some more checks
 328          */
 329
 330         /* Set file/virtual offset based on a.out variant. */
 331         switch ((int)(a_out->a_magic & 0xffff)) {
 332         case 0413:      /* ZMAGIC */
 333                 file_offset = 1024;
 334                 break;
 335         case 0314:      /* QMAGIC */
 336                 file_offset = 0;
 337                 break;
 338         default:
 339                 error = ENOEXEC;
 340                 goto cleanup;
 341         }
 342
 343         bss_size = round_page(a_out->a_bss);
 344
 345         /* Check various fields in header for validity/bounds. */
 346         if (a_out->a_text & PAGE_MASK || a_out->a_data & PAGE_MASK) {
 347                 error = ENOEXEC;
 348                 goto cleanup;
 349         }
 350
 351         /* text + data can't exceed file size */
 352         if (a_out->a_data + a_out->a_text > attr.va_size) {
 353                 error = EFAULT;
 354                 goto cleanup;
 355         }
 356
 357         /*
 358          * text/data/bss must not exceed limits
 359          * XXX - this is not complete. it should check current usage PLUS
 360          * the resources needed by this library.
 361          */
 362         if (a_out->a_text > maxtsiz ||
 363             a_out->a_data + bss_size > p->p_rlimit[RLIMIT_DATA].rlim_cur) {
 364                 error = ENOMEM;
 365                 goto cleanup;
 366         }
 367
 368         /* prevent more writers */
 369         vp->v_flag |= VTEXT;
 370
 371         /*
 372          * Check if file_offset page aligned. Currently we cannot handle
 373          * misalinged file offsets, and so we read in the entire image
 374          * (what a waste).
 375          */
 376         if (file_offset & PAGE_MASK) {
 377 #ifdef DEBUG
 378                 kprintf("uselib: Non page aligned binary %lu\n", file_offset);
 379 #endif
 380                 /* Map text+data read/write/execute */
 381
 382                 /* a_entry is the load address and is page aligned */
 383                 vmaddr = trunc_page(a_out->a_entry);
 384
 385                 /* get anon user mapping, read+write+execute */
 386                 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0,
 387                                     &vmaddr, a_out->a_text + a_out->a_data,
 388                                     FALSE,
 389                                     VM_MAPTYPE_NORMAL,
 390                                     VM_PROT_ALL, VM_PROT_ALL,
 391                                     0);
 392                 if (error)
 393                         goto cleanup;
 394
 395                 /* map file into kernel_map */
 396                 error = vm_mmap(&kernel_map, &buffer,
 397                     round_page(a_out->a_text + a_out->a_data + file_offset),
 398                     VM_PROT_READ, VM_PROT_READ, 0, (caddr_t)vp,
 399                     trunc_page(file_offset));
 400                 if (error)
 401                         goto cleanup;
 402
 403                 /* copy from kernel VM space to user space */
 404                 error = copyout((caddr_t)(uintptr_t)(buffer + file_offset),
 405                     (caddr_t)vmaddr, a_out->a_text + a_out->a_data);
 406
 407                 /* release temporary kernel space */
 408                 vm_map_remove(&kernel_map, buffer, buffer +
 409                     round_page(a_out->a_text + a_out->a_data + file_offset));
 410
 411                 if (error)
 412                         goto cleanup;
 413         } else {
 414 #ifdef DEBUG
 415                 kprintf("uselib: Page aligned binary %lu\n", file_offset);
 416 #endif
 417                 /*
 418                  * for QMAGIC, a_entry is 20 bytes beyond the load address
 419                  * to skip the executable header
 420                  */
 421                 vmaddr = trunc_page(a_out->a_entry);
 422
 423                 /*
 424                  * Map it all into the process's space as a single
 425                  * copy-on-write "data" segment.
 426                  */
 427                 error = vm_mmap(&p->p_vmspace->vm_map, &vmaddr,
 428                     a_out->a_text + a_out->a_data, VM_PROT_ALL, VM_PROT_ALL,
 429                     MAP_PRIVATE | MAP_FIXED, (caddr_t)vp, file_offset);
 430                 if (error)
 431                         goto cleanup;
 432         }
 433 #ifdef DEBUG
 434         kprintf("mem=%08lx = %08lx %08lx\n", (long)vmaddr, ((long*)vmaddr)[0],
 435             ((long*)vmaddr)[1]);
 436 #endif
 437         if (bss_size != 0) {
 438                 /* Calculate BSS start address */
 439                 vmaddr = trunc_page(a_out->a_entry) + a_out->a_text +
 440                     a_out->a_data;
 441
 442                 /* allocate some 'anon' space */
 443                 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0,
 444                                     &vmaddr, bss_size,
 445                                     FALSE,
 446                                     VM_MAPTYPE_NORMAL,
 447                                     VM_PROT_ALL, VM_PROT_ALL,
 448                                     0);
 449                 if (error)
 450                         goto cleanup;
 451         }
 452
 453 cleanup:
 454         /* Unlock/release vnode */
 455         if (vp) {
 456                 if (locked)
 457                         vn_unlock(vp);
 458                 vrele(vp);
 459         }
 460         /* Release the kernel mapping. */
 461         if (a_out) {
 462                 vm_map_remove(&kernel_map, (vm_offset_t)a_out,
 463                     (vm_offset_t)a_out + PAGE_SIZE);
 464         }
 465         nlookup_done(&nd);
 466         linux_free_path(&path);
 467         return (error);
 468 }
 469
 470 int
 471 sys_linux_select(struct linux_select_args *args)
 472 {
 473         struct select_args bsa;
 474         struct timeval tv0, tv1, utv, *tvp;
 475         caddr_t sg;
 476         int error;
 477
 478 #ifdef DEBUG
 479         if (ldebug(select))
 480                 kprintf(ARGS(select, "%d, %p, %p, %p, %p"), args->nfds,
 481                     (void *)args->readfds, (void *)args->writefds,
 482                     (void *)args->exceptfds, (void *)args->timeout);
 483 #endif
 484
 485         error = 0;
 486         bsa.sysmsg_result = 0;
 487         bsa.nd = args->nfds;
 488         bsa.in = args->readfds;
 489         bsa.ou = args->writefds;
 490         bsa.ex = args->exceptfds;
 491         bsa.tv = (struct timeval *)args->timeout;
 492
 493         /*
 494          * Store current time for computation of the amount of
 495          * time left.
 496          */
 497         if (args->timeout) {
 498                 if ((error = copyin((caddr_t)args->timeout, &utv,
 499                     sizeof(utv))))
 500                         goto select_out;
 501 #ifdef DEBUG
 502                 if (ldebug(select))
 503                         kprintf(LMSG("incoming timeout (%ld/%ld)"),
 504                             utv.tv_sec, utv.tv_usec);
 505 #endif
 506
 507                 if (itimerfix(&utv)) {
 508                         /*
 509                          * The timeval was invalid.  Convert it to something
 510                          * valid that will act as it does under Linux.
 511                          */
 512                         sg = stackgap_init();
 513                         tvp = stackgap_alloc(&sg, sizeof(utv));
 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                         if ((error = copyout(&utv, tvp, sizeof(utv))))
 523                                 goto select_out;
 524                         bsa.tv = tvp;
 525                 }
 526                 microtime(&tv0);
 527         }
 528
 529         error = sys_select(&bsa);
 530         args->sysmsg_result = bsa.sysmsg_result;
 531 #ifdef DEBUG
 532         if (ldebug(select))
 533                 kprintf(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 (args->sysmsg_result) {
 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                         kprintf(LMSG("outgoing timeout (%ld/%ld)"),
 563                             utv.tv_sec, utv.tv_usec);
 564 #endif
 565                 if ((error = copyout(&utv, (caddr_t)args->timeout,
 566                     sizeof(utv))))
 567                         goto select_out;
 568         }
 569
 570 select_out:
 571 #ifdef DEBUG
 572         if (ldebug(select))
 573                 kprintf(LMSG("select_out -> %d"), error);
 574 #endif
 575         return error;
 576 }
 577
 578 int
 579 sys_linux_mremap(struct linux_mremap_args *args)
 580 {
 581         struct munmap_args bsd_args;
 582         int error = 0;
 583
 584 #ifdef DEBUG
 585         if (ldebug(mremap))
 586                 kprintf(ARGS(mremap, "%p, %08lx, %08lx, %08lx"),
 587                     (void *)args->addr,
 588                     (unsigned long)args->old_len,
 589                     (unsigned long)args->new_len,
 590                     (unsigned long)args->flags);
 591 #endif
 592         args->new_len = round_page(args->new_len);
 593         args->old_len = round_page(args->old_len);
 594
 595         if (args->new_len > args->old_len) {
 596                 args->sysmsg_result = 0;
 597                 return ENOMEM;
 598         }
 599
 600         if (args->new_len < args->old_len) {
 601                 bsd_args.sysmsg_result = 0;
 602                 bsd_args.addr = (caddr_t)(args->addr + args->new_len);
 603                 bsd_args.len = args->old_len - args->new_len;
 604                 error = sys_munmap(&bsd_args);
 605         }
 606
 607         args->sysmsg_resultp = error ? NULL : (void *)args->addr;
 608         return error;
 609 }
 610
 611 #define LINUX_MS_ASYNC          0x0001
 612 #define LINUX_MS_INVALIDATE     0x0002
 613 #define LINUX_MS_SYNC           0x0004
 614
 615 int
 616 sys_linux_msync(struct linux_msync_args *args)
 617 {
 618         struct msync_args bsd_args;
 619         int error;
 620
 621         bsd_args.addr = (caddr_t)args->addr;
 622         bsd_args.len = args->len;
 623         bsd_args.flags = args->fl & ~LINUX_MS_SYNC;
 624         bsd_args.sysmsg_result = 0;
 625
 626         error = sys_msync(&bsd_args);
 627         args->sysmsg_result = bsd_args.sysmsg_result;
 628         return(error);
 629 }
 630
 631 int
 632 sys_linux_time(struct linux_time_args *args)
 633 {
 634         struct timeval tv;
 635         l_time_t tm;
 636         int error;
 637
 638 #ifdef DEBUG
 639         if (ldebug(time))
 640                 kprintf(ARGS(time, "*"));
 641 #endif
 642
 643         microtime(&tv);
 644         tm = tv.tv_sec;
 645         if (args->tm && (error = copyout(&tm, (caddr_t)args->tm, sizeof(tm))))
 646                 return error;
 647         args->sysmsg_lresult = tm;
 648         return 0;
 649 }
 650
 651 struct l_times_argv {
 652         l_long          tms_utime;
 653         l_long          tms_stime;
 654         l_long          tms_cutime;
 655         l_long          tms_cstime;
 656 };
 657
 658 #define CLK_TCK 100     /* Linux uses 100 */
 659
 660 #define CONVTCK(r)      (r.tv_sec * CLK_TCK + r.tv_usec / (1000000 / CLK_TCK))
 661
 662 int
 663 sys_linux_times(struct linux_times_args *args)
 664 {
 665         struct thread *td = curthread;
 666         struct proc *p = td->td_proc;
 667         struct timeval tv;
 668         struct l_times_argv tms;
 669         struct rusage ru;
 670         int error;
 671
 672         KKASSERT(p);
 673 #ifdef DEBUG
 674         if (ldebug(times))
 675                 kprintf(ARGS(times, "*"));
 676 #endif
 677
 678         calcru_proc(p, &ru);
 679
 680         tms.tms_utime = CONVTCK(ru.ru_utime);
 681         tms.tms_stime = CONVTCK(ru.ru_stime);
 682
 683         tms.tms_cutime = CONVTCK(p->p_cru.ru_utime);
 684         tms.tms_cstime = CONVTCK(p->p_cru.ru_stime);
 685
 686         if ((error = copyout(&tms, (caddr_t)args->buf, sizeof(tms))))
 687                 return error;
 688
 689         microuptime(&tv);
 690         args->sysmsg_result = (int)CONVTCK(tv);
 691         return 0;
 692 }
 693
 694 int
 695 sys_linux_newuname(struct linux_newuname_args *args)
 696 {
 697         struct thread *td = curthread;
 698         struct l_new_utsname utsname;
 699         char *osrelease, *osname;
 700
 701 #ifdef DEBUG
 702         if (ldebug(newuname))
 703                 kprintf(ARGS(newuname, "*"));
 704 #endif
 705
 706         osname = linux_get_osname(td);
 707         osrelease = linux_get_osrelease(td);
 708
 709         bzero(&utsname, sizeof(utsname));
 710         strncpy(utsname.sysname, osname, LINUX_MAX_UTSNAME-1);
 711         strncpy(utsname.nodename, hostname, LINUX_MAX_UTSNAME-1);
 712         strncpy(utsname.release, osrelease, LINUX_MAX_UTSNAME-1);
 713         strncpy(utsname.version, version, LINUX_MAX_UTSNAME-1);
 714         strncpy(utsname.machine, machine, LINUX_MAX_UTSNAME-1);
 715         strncpy(utsname.domainname, domainname, LINUX_MAX_UTSNAME-1);
 716
 717         return (copyout(&utsname, (caddr_t)args->buf, sizeof(utsname)));
 718 }
 719
 720 #if defined(__i386__)
 721 struct l_utimbuf {
 722         l_time_t l_actime;
 723         l_time_t l_modtime;
 724 };
 725
 726 int
 727 sys_linux_utime(struct linux_utime_args *args)
 728 {
 729         struct timeval tv[2];
 730         struct l_utimbuf lut;
 731         struct nlookupdata nd;
 732         char *path;
 733         int error;
 734
 735         error = linux_copyin_path(args->fname, &path, LINUX_PATH_EXISTS);
 736         if (error)
 737                 return (error);
 738 #ifdef DEBUG
 739         if (ldebug(utime))
 740                 kprintf(ARGS(utime, "%s, *"), path);
 741 #endif
 742
 743         if (args->times) {
 744                 error = copyin(args->times, &lut, sizeof(lut));
 745                 if (error)
 746                         goto cleanup;
 747                 tv[0].tv_sec = lut.l_actime;
 748                 tv[0].tv_usec = 0;
 749                 tv[1].tv_sec = lut.l_modtime;
 750                 tv[1].tv_usec = 0;
 751         }
 752         error = nlookup_init(&nd, path, UIO_SYSSPACE, NLC_FOLLOW);
 753         if (error == 0)
 754                 error = kern_utimes(&nd, args->times ? tv : NULL);
 755         nlookup_done(&nd);
 756 cleanup:
 757         linux_free_path(&path);
 758         return (error);
 759 }
 760 #endif /* __i386__ */
 761
 762 #define __WCLONE 0x80000000
 763
 764 int
 765 sys_linux_waitpid(struct linux_waitpid_args *args)
 766 {
 767         int error, options, status;
 768
 769 #ifdef DEBUG
 770         if (ldebug(waitpid))
 771                 kprintf(ARGS(waitpid, "%d, %p, %d"),
 772                     args->pid, (void *)args->status, args->options);
 773 #endif
 774         options = args->options & (WNOHANG | WUNTRACED);
 775         /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
 776         if (args->options & __WCLONE)
 777                 options |= WLINUXCLONE;
 778
 779         error = kern_wait(args->pid, args->status ? &status : NULL, options,
 780             NULL, &args->sysmsg_result);
 781
 782         if (error == 0 && args->status) {
 783                 status &= 0xffff;
 784                 if (WIFSIGNALED(status))
 785                         status = (status & 0xffffff80) |
 786                             BSD_TO_LINUX_SIGNAL(WTERMSIG(status));
 787                 else if (WIFSTOPPED(status))
 788                         status = (status & 0xffff00ff) |
 789                             (BSD_TO_LINUX_SIGNAL(WSTOPSIG(status)) << 8);
 790                 error = copyout(&status, args->status, sizeof(status));
 791         }
 792
 793         return (error);
 794 }
 795
 796 int
 797 sys_linux_wait4(struct linux_wait4_args *args)
 798 {
 799         struct thread *td = curthread;
 800         struct lwp *lp = td->td_lwp;
 801         struct rusage rusage;
 802         int error, options, status;
 803
 804         KKASSERT(lp);
 805
 806 #ifdef DEBUG
 807         if (ldebug(wait4))
 808                 kprintf(ARGS(wait4, "%d, %p, %d, %p"),
 809                     args->pid, (void *)args->status, args->options,
 810                     (void *)args->rusage);
 811 #endif
 812         options = args->options & (WNOHANG | WUNTRACED);
 813         /* WLINUXCLONE should be equal to __WCLONE, but we make sure */
 814         if (args->options & __WCLONE)
 815                 options |= WLINUXCLONE;
 816
 817         error = kern_wait(args->pid, args->status ? &status : NULL, options,
 818             args->rusage ? &rusage : NULL, &args->sysmsg_result);
 819
 820         if (error == 0)
 821                 lwp_delsig(lp, SIGCHLD);
 822
 823         if (error == 0 && args->status) {
 824                 status &= 0xffff;
 825                 if (WIFSIGNALED(status))
 826                         status = (status & 0xffffff80) |
 827                             BSD_TO_LINUX_SIGNAL(WTERMSIG(status));
 828                 else if (WIFSTOPPED(status))
 829                         status = (status & 0xffff00ff) |
 830                             (BSD_TO_LINUX_SIGNAL(WSTOPSIG(status)) << 8);
 831                 error = copyout(&status, args->status, sizeof(status));
 832         }
 833         if (error == 0 && args->rusage)
 834                 error = copyout(&rusage, args->rusage, sizeof(rusage));
 835
 836         return (error);
 837 }
 838
 839 int
 840 sys_linux_mknod(struct linux_mknod_args *args)
 841 {
 842         struct nlookupdata nd;
 843         char *path;
 844         int error;
 845
 846         error = linux_copyin_path(args->path, &path, LINUX_PATH_CREATE);
 847         if (error)
 848                 return (error);
 849 #ifdef DEBUG
 850         if (ldebug(mknod))
 851                 kprintf(ARGS(mknod, "%s, %d, %d"),
 852                     path, args->mode, args->dev);
 853 #endif
 854         error = nlookup_init(&nd, path, UIO_SYSSPACE, 0);
 855         if (error == 0) {
 856                 if (args->mode & S_IFIFO) {
 857                         error = kern_mkfifo(&nd, args->mode);
 858                 } else {
 859                         error = kern_mknod(&nd, args->mode, args->dev);
 860                 }
 861         }
 862         nlookup_done(&nd);
 863
 864         linux_free_path(&path);
 865         return(error);
 866 }
 867
 868 /*
 869  * UGH! This is just about the dumbest idea I've ever heard!!
 870  */
 871 int
 872 sys_linux_personality(struct linux_personality_args *args)
 873 {
 874 #ifdef DEBUG
 875         if (ldebug(personality))
 876                 kprintf(ARGS(personality, "%d"), args->per);
 877 #endif
 878         if (args->per != 0)
 879                 return EINVAL;
 880
 881         /* Yes Jim, it's still a Linux... */
 882         args->sysmsg_result = 0;
 883         return 0;
 884 }
 885
 886 /*
 887  * Wrappers for get/setitimer for debugging..
 888  */
 889 int
 890 sys_linux_setitimer(struct linux_setitimer_args *args)
 891 {
 892         struct setitimer_args bsa;
 893         struct itimerval foo;
 894         int error;
 895
 896 #ifdef DEBUG
 897         if (ldebug(setitimer))
 898                 kprintf(ARGS(setitimer, "%p, %p"),
 899                     (void *)args->itv, (void *)args->oitv);
 900 #endif
 901         bsa.which = args->which;
 902         bsa.itv = (struct itimerval *)args->itv;
 903         bsa.oitv = (struct itimerval *)args->oitv;
 904         bsa.sysmsg_result = 0;
 905         if (args->itv) {
 906             if ((error = copyin((caddr_t)args->itv, &foo, sizeof(foo))))
 907                 return error;
 908 #ifdef DEBUG
 909             if (ldebug(setitimer)) {
 910                 kprintf("setitimer: value: sec: %ld, usec: %ld\n",
 911                     foo.it_value.tv_sec, foo.it_value.tv_usec);
 912                 kprintf("setitimer: interval: sec: %ld, usec: %ld\n",
 913                     foo.it_interval.tv_sec, foo.it_interval.tv_usec);
 914             }
 915 #endif
 916         }
 917         error = sys_setitimer(&bsa);
 918         args->sysmsg_result = bsa.sysmsg_result;
 919         return(error);
 920 }
 921
 922 int
 923 sys_linux_getitimer(struct linux_getitimer_args *args)
 924 {
 925         struct getitimer_args bsa;
 926         int error;
 927 #ifdef DEBUG
 928         if (ldebug(getitimer))
 929                 kprintf(ARGS(getitimer, "%p"), (void *)args->itv);
 930 #endif
 931         bsa.which = args->which;
 932         bsa.itv = (struct itimerval *)args->itv;
 933         bsa.sysmsg_result = 0;
 934         error = sys_getitimer(&bsa);
 935         args->sysmsg_result = bsa.sysmsg_result;
 936         return(error);
 937 }
 938
 939 int
 940 sys_linux_nice(struct linux_nice_args *args)
 941 {
 942         struct setpriority_args bsd_args;
 943         int error;
 944
 945         bsd_args.which = PRIO_PROCESS;
 946         bsd_args.who = 0;       /* current process */
 947         bsd_args.prio = args->inc;
 948         bsd_args.sysmsg_result = 0;
 949         error = sys_setpriority(&bsd_args);
 950         args->sysmsg_result = bsd_args.sysmsg_result;
 951         return(error);
 952 }
 953
 954 int
 955 sys_linux_setgroups(struct linux_setgroups_args *args)
 956 {
 957         struct thread *td = curthread;
 958         struct proc *p = td->td_proc;
 959         struct ucred *newcred, *oldcred;
 960         l_gid_t linux_gidset[NGROUPS];
 961         gid_t *bsd_gidset;
 962         int ngrp, error;
 963
 964         KKASSERT(p);
 965
 966         ngrp = args->gidsetsize;
 967         oldcred = p->p_ucred;
 968
 969         /*
 970          * cr_groups[0] holds egid. Setting the whole set from
 971          * the supplied set will cause egid to be changed too.
 972          * Keep cr_groups[0] unchanged to prevent that.
 973          */
 974
 975         if ((error = suser_cred(oldcred, PRISON_ROOT)) != 0)
 976                 return (error);
 977
 978         if (ngrp >= NGROUPS)
 979                 return (EINVAL);
 980
 981         newcred = crdup(oldcred);
 982         if (ngrp > 0) {
 983                 error = copyin((caddr_t)args->grouplist, linux_gidset,
 984                                ngrp * sizeof(l_gid_t));
 985                 if (error)
 986                         return (error);
 987
 988                 newcred->cr_ngroups = ngrp + 1;
 989
 990                 bsd_gidset = newcred->cr_groups;
 991                 ngrp--;
 992                 while (ngrp >= 0) {
 993                         bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
 994                         ngrp--;
 995                 }
 996         } else {
 997                 newcred->cr_ngroups = 1;
 998         }
 999
1000         setsugid();
1001         p->p_ucred = newcred;
1002         crfree(oldcred);
1003         return (0);
1004 }
1005
1006 int
1007 sys_linux_getgroups(struct linux_getgroups_args *args)
1008 {
1009         struct thread *td = curthread;
1010         struct proc *p = td->td_proc;
1011         struct ucred *cred;
1012         l_gid_t linux_gidset[NGROUPS];
1013         gid_t *bsd_gidset;
1014         int bsd_gidsetsz, ngrp, error;
1015
1016         KKASSERT(p);
1017
1018         cred = p->p_ucred;
1019         bsd_gidset = cred->cr_groups;
1020         bsd_gidsetsz = cred->cr_ngroups - 1;
1021
1022         /*
1023          * cr_groups[0] holds egid. Returning the whole set
1024          * here will cause a duplicate. Exclude cr_groups[0]
1025          * to prevent that.
1026          */
1027
1028         if ((ngrp = args->gidsetsize) == 0) {
1029                 args->sysmsg_result = bsd_gidsetsz;
1030                 return (0);
1031         }
1032
1033         if (ngrp < bsd_gidsetsz)
1034                 return (EINVAL);
1035
1036         ngrp = 0;
1037         while (ngrp < bsd_gidsetsz) {
1038                 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
1039                 ngrp++;
1040         }
1041
1042         if ((error = copyout(linux_gidset, (caddr_t)args->grouplist,
1043             ngrp * sizeof(l_gid_t))))
1044                 return (error);
1045
1046         args->sysmsg_result = ngrp;
1047         return (0);
1048 }
1049
1050 int
1051 sys_linux_setrlimit(struct linux_setrlimit_args *args)
1052 {
1053         struct l_rlimit linux_rlim;
1054         struct rlimit rlim;
1055         u_int which;
1056         int error;
1057
1058 #ifdef DEBUG
1059         if (ldebug(setrlimit))
1060                 kprintf(ARGS(setrlimit, "%d, %p"),
1061                     args->resource, (void *)args->rlim);
1062 #endif
1063         if (args->resource >= LINUX_RLIM_NLIMITS)
1064                 return (EINVAL);
1065         which = linux_to_bsd_resource[args->resource];
1066         if (which == -1)
1067                 return (EINVAL);
1068
1069         error = copyin(args->rlim, &linux_rlim, sizeof(linux_rlim));
1070         if (error)
1071                 return (error);
1072         rlim.rlim_cur = (rlim_t)linux_rlim.rlim_cur;
1073         rlim.rlim_max = (rlim_t)linux_rlim.rlim_max;
1074
1075         error = kern_setrlimit(which, &rlim);
1076
1077         return(error);
1078 }
1079
1080 int
1081 sys_linux_old_getrlimit(struct linux_old_getrlimit_args *args)
1082 {
1083         struct l_rlimit linux_rlim;
1084         struct rlimit rlim;
1085         u_int which;
1086         int error;
1087
1088 #ifdef DEBUG
1089         if (ldebug(old_getrlimit))
1090                 kprintf(ARGS(old_getrlimit, "%d, %p"),
1091                     args->resource, (void *)args->rlim);
1092 #endif
1093         if (args->resource >= LINUX_RLIM_NLIMITS)
1094                 return (EINVAL);
1095         which = linux_to_bsd_resource[args->resource];
1096         if (which == -1)
1097                 return (EINVAL);
1098
1099         error = kern_getrlimit(which, &rlim);
1100
1101         if (error == 0) {
1102                 linux_rlim.rlim_cur = (l_ulong)rlim.rlim_cur;
1103                 if (linux_rlim.rlim_cur == ULONG_MAX)
1104                         linux_rlim.rlim_cur = LONG_MAX;
1105                 linux_rlim.rlim_max = (l_ulong)rlim.rlim_max;
1106                 if (linux_rlim.rlim_max == ULONG_MAX)
1107                         linux_rlim.rlim_max = LONG_MAX;
1108                 error = copyout(&linux_rlim, args->rlim, sizeof(linux_rlim));
1109         }
1110         return (error);
1111 }
1112
1113 int
1114 sys_linux_getrlimit(struct linux_getrlimit_args *args)
1115 {
1116         struct l_rlimit linux_rlim;
1117         struct rlimit rlim;
1118         u_int which;
1119         int error;
1120
1121 #ifdef DEBUG
1122         if (ldebug(getrlimit))
1123                 kprintf(ARGS(getrlimit, "%d, %p"),
1124                     args->resource, (void *)args->rlim);
1125 #endif
1126         if (args->resource >= LINUX_RLIM_NLIMITS)
1127                 return (EINVAL);
1128         which = linux_to_bsd_resource[args->resource];
1129         if (which == -1)
1130                 return (EINVAL);
1131
1132         error = kern_getrlimit(which, &rlim);
1133
1134         if (error == 0) {
1135                 linux_rlim.rlim_cur = (l_ulong)rlim.rlim_cur;
1136                 linux_rlim.rlim_max = (l_ulong)rlim.rlim_max;
1137                 error = copyout(&linux_rlim, args->rlim, sizeof(linux_rlim));
1138         }
1139         return (error);
1140 }
1141
1142 int
1143 sys_linux_sched_setscheduler(struct linux_sched_setscheduler_args *args)
1144 {
1145         struct sched_setscheduler_args bsd;
1146         int error;
1147
1148 #ifdef DEBUG
1149         if (ldebug(sched_setscheduler))
1150                 kprintf(ARGS(sched_setscheduler, "%d, %d, %p"),
1151                     args->pid, args->policy, (const void *)args->param);
1152 #endif
1153
1154         switch (args->policy) {
1155         case LINUX_SCHED_OTHER:
1156                 bsd.policy = SCHED_OTHER;
1157                 break;
1158         case LINUX_SCHED_FIFO:
1159                 bsd.policy = SCHED_FIFO;
1160                 break;
1161         case LINUX_SCHED_RR:
1162                 bsd.policy = SCHED_RR;
1163                 break;
1164         default:
1165                 return EINVAL;
1166         }
1167
1168         bsd.pid = args->pid;
1169         bsd.param = (struct sched_param *)args->param;
1170         bsd.sysmsg_result = 0;
1171
1172         error = sys_sched_setscheduler(&bsd);
1173         args->sysmsg_result = bsd.sysmsg_result;
1174         return(error);
1175 }
1176
1177 int
1178 sys_linux_sched_getscheduler(struct linux_sched_getscheduler_args *args)
1179 {
1180         struct sched_getscheduler_args bsd;
1181         int error;
1182
1183 #ifdef DEBUG
1184         if (ldebug(sched_getscheduler))
1185                 kprintf(ARGS(sched_getscheduler, "%d"), args->pid);
1186 #endif
1187
1188         bsd.sysmsg_result = 0;
1189         bsd.pid = args->pid;
1190         error = sys_sched_getscheduler(&bsd);
1191         args->sysmsg_result = bsd.sysmsg_result;
1192
1193         switch (args->sysmsg_result) {
1194         case SCHED_OTHER:
1195                 args->sysmsg_result = LINUX_SCHED_OTHER;
1196                 break;
1197         case SCHED_FIFO:
1198                 args->sysmsg_result = LINUX_SCHED_FIFO;
1199                 break;
1200         case SCHED_RR:
1201                 args->sysmsg_result = LINUX_SCHED_RR;
1202                 break;
1203         }
1204         return error;
1205 }
1206
1207 int
1208 sys_linux_sched_get_priority_max(struct linux_sched_get_priority_max_args *args)
1209 {
1210         struct sched_get_priority_max_args bsd;
1211         int error;
1212
1213 #ifdef DEBUG
1214         if (ldebug(sched_get_priority_max))
1215                 kprintf(ARGS(sched_get_priority_max, "%d"), args->policy);
1216 #endif
1217
1218         switch (args->policy) {
1219         case LINUX_SCHED_OTHER:
1220                 bsd.policy = SCHED_OTHER;
1221                 break;
1222         case LINUX_SCHED_FIFO:
1223                 bsd.policy = SCHED_FIFO;
1224                 break;
1225         case LINUX_SCHED_RR:
1226                 bsd.policy = SCHED_RR;
1227                 break;
1228         default:
1229                 return EINVAL;
1230         }
1231         bsd.sysmsg_result = 0;
1232
1233         error = sys_sched_get_priority_max(&bsd);
1234         args->sysmsg_result = bsd.sysmsg_result;
1235         return(error);
1236 }
1237
1238 int
1239 sys_linux_sched_get_priority_min(struct linux_sched_get_priority_min_args *args)
1240 {
1241         struct sched_get_priority_min_args bsd;
1242         int error;
1243
1244 #ifdef DEBUG
1245         if (ldebug(sched_get_priority_min))
1246                 kprintf(ARGS(sched_get_priority_min, "%d"), args->policy);
1247 #endif
1248
1249         switch (args->policy) {
1250         case LINUX_SCHED_OTHER:
1251                 bsd.policy = SCHED_OTHER;
1252                 break;
1253         case LINUX_SCHED_FIFO:
1254                 bsd.policy = SCHED_FIFO;
1255                 break;
1256         case LINUX_SCHED_RR:
1257                 bsd.policy = SCHED_RR;
1258                 break;
1259         default:
1260                 return EINVAL;
1261         }
1262         bsd.sysmsg_result = 0;
1263
1264         error = sys_sched_get_priority_min(&bsd);
1265         args->sysmsg_result = bsd.sysmsg_result;
1266         return(error);
1267 }
1268
1269 #define REBOOT_CAD_ON   0x89abcdef
1270 #define REBOOT_CAD_OFF  0
1271 #define REBOOT_HALT     0xcdef0123
1272
1273 int
1274 sys_linux_reboot(struct linux_reboot_args *args)
1275 {
1276         struct reboot_args bsd_args;
1277         int error;
1278
1279 #ifdef DEBUG
1280         if (ldebug(reboot))
1281                 kprintf(ARGS(reboot, "0x%x"), args->cmd);
1282 #endif
1283         if (args->cmd == REBOOT_CAD_ON || args->cmd == REBOOT_CAD_OFF)
1284                 return (0);
1285         bsd_args.opt = (args->cmd == REBOOT_HALT) ? RB_HALT : 0;
1286         bsd_args.sysmsg_result = 0;
1287
1288         error = sys_reboot(&bsd_args);
1289         args->sysmsg_result = bsd_args.sysmsg_result;
1290         return(error);
1291 }
1292
1293 /*
1294  * The FreeBSD native getpid(2), getgid(2) and getuid(2) also modify
1295  * p->p_retval[1] when COMPAT_43 or COMPAT_SUNOS is defined. This
1296  * globbers registers that are assumed to be preserved. The following
1297  * lightweight syscalls fixes this. See also linux_getgid16() and
1298  * linux_getuid16() in linux_uid16.c.
1299  *
1300  * linux_getpid() - MP SAFE
1301  * linux_getgid() - MP SAFE
1302  * linux_getuid() - MP SAFE
1303  */
1304
1305 int
1306 sys_linux_getpid(struct linux_getpid_args *args)
1307 {
1308         struct thread *td = curthread;
1309         struct proc *p = td->td_proc;
1310
1311         KKASSERT(p);
1312
1313         args->sysmsg_result = p->p_pid;
1314         return (0);
1315 }
1316
1317 int
1318 sys_linux_getgid(struct linux_getgid_args *args)
1319 {
1320         struct thread *td = curthread;
1321         struct proc *p = td->td_proc;
1322
1323         KKASSERT(p);
1324
1325         args->sysmsg_result = p->p_ucred->cr_rgid;
1326         return (0);
1327 }
1328
1329 int
1330 sys_linux_getuid(struct linux_getuid_args *args)
1331 {
1332         struct thread *td = curthread;
1333         struct proc *p = td->td_proc;
1334
1335         KKASSERT(p);
1336
1337         args->sysmsg_result = p->p_ucred->cr_ruid;
1338         return (0);
1339 }
1340
1341 int
1342 sys_linux_getsid(struct linux_getsid_args *args)
1343 {
1344         struct getsid_args bsd;
1345         int error;
1346
1347         bsd.sysmsg_result = 0;
1348         bsd.pid = args->pid;
1349         error = sys_getsid(&bsd);
1350         args->sysmsg_result = bsd.sysmsg_result;
1351         return(error);
1352 }
1353
1354 int
1355 linux_nosys(struct nosys_args *args)
1356 {
1357         /* XXX */
1358         return (ENOSYS);
1359 }