util/oslib-win32.c

   1 /*
   2  * os-win32.c
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  * Copyright (c) 2010-2016 Red Hat, Inc.
   6  *
   7  * QEMU library functions for win32 which are shared between QEMU and
   8  * the QEMU tools.
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  23  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26  * THE SOFTWARE.
  27  *
  28  * The implementation of g_poll (functions poll_rest, g_poll) at the end of
  29  * this file are based on code from GNOME glib-2 and use a different license,
  30  * see the license comment there.
  31  */
  32
  33 #include "qemu/osdep.h"
  34 #include <windows.h>
  35 #include "qemu-common.h"
  36 #include "qapi/error.h"
  37 #include "sysemu/sysemu.h"
  38 #include "qemu/main-loop.h"
  39 #include "trace.h"
  40 #include "qemu/sockets.h"
  41 #include "qemu/cutils.h"
  42
  43 /* this must come after including "trace.h" */
  44 #include <shlobj.h>
  45
  46 void *qemu_oom_check(void *ptr)
  47 {
  48     if (ptr == NULL) {
  49         fprintf(stderr, "Failed to allocate memory: %lu\n", GetLastError());
  50         abort();
  51     }
  52     return ptr;
  53 }
  54
  55 void *qemu_try_memalign(size_t alignment, size_t size)
  56 {
  57     void *ptr;
  58
  59     if (!size) {
  60         abort();
  61     }
  62     ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
  63     trace_qemu_memalign(alignment, size, ptr);
  64     return ptr;
  65 }
  66
  67 void *qemu_memalign(size_t alignment, size_t size)
  68 {
  69     return qemu_oom_check(qemu_try_memalign(alignment, size));
  70 }
  71
  72 static int get_allocation_granularity(void)
  73 {
  74     SYSTEM_INFO system_info;
  75
  76     GetSystemInfo(&system_info);
  77     return system_info.dwAllocationGranularity;
  78 }
  79
  80 void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared)
  81 {
  82     void *ptr;
  83
  84     ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
  85     trace_qemu_anon_ram_alloc(size, ptr);
  86
  87     if (ptr && align) {
  88         *align = MAX(get_allocation_granularity(), getpagesize());
  89     }
  90     return ptr;
  91 }
  92
  93 void qemu_vfree(void *ptr)
  94 {
  95     trace_qemu_vfree(ptr);
  96     if (ptr) {
  97         VirtualFree(ptr, 0, MEM_RELEASE);
  98     }
  99 }
 100
 101 void qemu_anon_ram_free(void *ptr, size_t size)
 102 {
 103     trace_qemu_anon_ram_free(ptr, size);
 104     if (ptr) {
 105         VirtualFree(ptr, 0, MEM_RELEASE);
 106     }
 107 }
 108
 109 #ifndef CONFIG_LOCALTIME_R
 110 /* FIXME: add proper locking */
 111 struct tm *gmtime_r(const time_t *timep, struct tm *result)
 112 {
 113     struct tm *p = gmtime(timep);
 114     memset(result, 0, sizeof(*result));
 115     if (p) {
 116         *result = *p;
 117         p = result;
 118     }
 119     return p;
 120 }
 121
 122 /* FIXME: add proper locking */
 123 struct tm *localtime_r(const time_t *timep, struct tm *result)
 124 {
 125     struct tm *p = localtime(timep);
 126     memset(result, 0, sizeof(*result));
 127     if (p) {
 128         *result = *p;
 129         p = result;
 130     }
 131     return p;
 132 }
 133 #endif /* CONFIG_LOCALTIME_R */
 134
 135 static int socket_error(void)
 136 {
 137     switch (WSAGetLastError()) {
 138     case 0:
 139         return 0;
 140     case WSAEINTR:
 141         return EINTR;
 142     case WSAEINVAL:
 143         return EINVAL;
 144     case WSA_INVALID_HANDLE:
 145         return EBADF;
 146     case WSA_NOT_ENOUGH_MEMORY:
 147         return ENOMEM;
 148     case WSA_INVALID_PARAMETER:
 149         return EINVAL;
 150     case WSAENAMETOOLONG:
 151         return ENAMETOOLONG;
 152     case WSAENOTEMPTY:
 153         return ENOTEMPTY;
 154     case WSAEWOULDBLOCK:
 155          /* not using EWOULDBLOCK as we don't want code to have
 156           * to check both EWOULDBLOCK and EAGAIN */
 157         return EAGAIN;
 158     case WSAEINPROGRESS:
 159         return EINPROGRESS;
 160     case WSAEALREADY:
 161         return EALREADY;
 162     case WSAENOTSOCK:
 163         return ENOTSOCK;
 164     case WSAEDESTADDRREQ:
 165         return EDESTADDRREQ;
 166     case WSAEMSGSIZE:
 167         return EMSGSIZE;
 168     case WSAEPROTOTYPE:
 169         return EPROTOTYPE;
 170     case WSAENOPROTOOPT:
 171         return ENOPROTOOPT;
 172     case WSAEPROTONOSUPPORT:
 173         return EPROTONOSUPPORT;
 174     case WSAEOPNOTSUPP:
 175         return EOPNOTSUPP;
 176     case WSAEAFNOSUPPORT:
 177         return EAFNOSUPPORT;
 178     case WSAEADDRINUSE:
 179         return EADDRINUSE;
 180     case WSAEADDRNOTAVAIL:
 181         return EADDRNOTAVAIL;
 182     case WSAENETDOWN:
 183         return ENETDOWN;
 184     case WSAENETUNREACH:
 185         return ENETUNREACH;
 186     case WSAENETRESET:
 187         return ENETRESET;
 188     case WSAECONNABORTED:
 189         return ECONNABORTED;
 190     case WSAECONNRESET:
 191         return ECONNRESET;
 192     case WSAENOBUFS:
 193         return ENOBUFS;
 194     case WSAEISCONN:
 195         return EISCONN;
 196     case WSAENOTCONN:
 197         return ENOTCONN;
 198     case WSAETIMEDOUT:
 199         return ETIMEDOUT;
 200     case WSAECONNREFUSED:
 201         return ECONNREFUSED;
 202     case WSAELOOP:
 203         return ELOOP;
 204     case WSAEHOSTUNREACH:
 205         return EHOSTUNREACH;
 206     default:
 207         return EIO;
 208     }
 209 }
 210
 211 void qemu_set_block(int fd)
 212 {
 213     unsigned long opt = 0;
 214     WSAEventSelect(fd, NULL, 0);
 215     ioctlsocket(fd, FIONBIO, &opt);
 216 }
 217
 218 int qemu_try_set_nonblock(int fd)
 219 {
 220     unsigned long opt = 1;
 221     if (ioctlsocket(fd, FIONBIO, &opt) != NO_ERROR) {
 222         return -socket_error();
 223     }
 224     qemu_fd_register(fd);
 225     return 0;
 226 }
 227
 228 void qemu_set_nonblock(int fd)
 229 {
 230     (void)qemu_try_set_nonblock(fd);
 231 }
 232
 233 int socket_set_fast_reuse(int fd)
 234 {
 235     /* Enabling the reuse of an endpoint that was used by a socket still in
 236      * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
 237      * fast reuse is the default and SO_REUSEADDR does strange things. So we
 238      * don't have to do anything here. More info can be found at:
 239      * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
 240     return 0;
 241 }
 242
 243 int inet_aton(const char *cp, struct in_addr *ia)
 244 {
 245     uint32_t addr = inet_addr(cp);
 246     if (addr == 0xffffffff) {
 247         return 0;
 248     }
 249     ia->s_addr = addr;
 250     return 1;
 251 }
 252
 253 void qemu_set_cloexec(int fd)
 254 {
 255 }
 256
 257 /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
 258 #define _W32_FT_OFFSET (116444736000000000ULL)
 259
 260 int qemu_gettimeofday(qemu_timeval *tp)
 261 {
 262   union {
 263     unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
 264     FILETIME ft;
 265   }  _now;
 266
 267   if(tp) {
 268       GetSystemTimeAsFileTime (&_now.ft);
 269       tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
 270       tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
 271   }
 272   /* Always return 0 as per Open Group Base Specifications Issue 6.
 273      Do not set errno on error.  */
 274   return 0;
 275 }
 276
 277 int qemu_get_thread_id(void)
 278 {
 279     return GetCurrentThreadId();
 280 }
 281
 282 char *
 283 qemu_get_local_state_pathname(const char *relative_pathname)
 284 {
 285     HRESULT result;
 286     char base_path[MAX_PATH+1] = "";
 287
 288     result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
 289                              /* SHGFP_TYPE_CURRENT */ 0, base_path);
 290     if (result != S_OK) {
 291         /* misconfigured environment */
 292         g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
 293         abort();
 294     }
 295     return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
 296                            relative_pathname);
 297 }
 298
 299 void qemu_set_tty_echo(int fd, bool echo)
 300 {
 301     HANDLE handle = (HANDLE)_get_osfhandle(fd);
 302     DWORD dwMode = 0;
 303
 304     if (handle == INVALID_HANDLE_VALUE) {
 305         return;
 306     }
 307
 308     GetConsoleMode(handle, &dwMode);
 309
 310     if (echo) {
 311         SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
 312     } else {
 313         SetConsoleMode(handle,
 314                        dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
 315     }
 316 }
 317
 318 static char exec_dir[PATH_MAX];
 319
 320 void qemu_init_exec_dir(const char *argv0)
 321 {
 322
 323     char *p;
 324     char buf[MAX_PATH];
 325     DWORD len;
 326
 327     len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
 328     if (len == 0) {
 329         return;
 330     }
 331
 332     buf[len] = 0;
 333     p = buf + len - 1;
 334     while (p != buf && *p != '\\') {
 335         p--;
 336     }
 337     *p = 0;
 338     if (access(buf, R_OK) == 0) {
 339         pstrcpy(exec_dir, sizeof(exec_dir), buf);
 340     }
 341 }
 342
 343 char *qemu_get_exec_dir(void)
 344 {
 345     return g_strdup(exec_dir);
 346 }
 347
 348 #if !GLIB_CHECK_VERSION(2, 50, 0)
 349 /*
 350  * The original implementation of g_poll from glib has a problem on Windows
 351  * when using timeouts < 10 ms.
 352  *
 353  * Whenever g_poll is called with timeout < 10 ms, it does a quick poll instead
 354  * of wait. This causes significant performance degradation of QEMU.
 355  *
 356  * The following code is a copy of the original code from glib/gpoll.c
 357  * (glib commit 20f4d1820b8d4d0fc4447188e33efffd6d4a88d8 from 2014-02-19).
 358  * Some debug code was removed and the code was reformatted.
 359  * All other code modifications are marked with 'QEMU'.
 360  */
 361
 362 /*
 363  * gpoll.c: poll(2) abstraction
 364  * Copyright 1998 Owen Taylor
 365  * Copyright 2008 Red Hat, Inc.
 366  *
 367  * This library is free software; you can redistribute it and/or
 368  * modify it under the terms of the GNU Lesser General Public
 369  * License as published by the Free Software Foundation; either
 370  * version 2 of the License, or (at your option) any later version.
 371  *
 372  * This library is distributed in the hope that it will be useful,
 373  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 374  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 375  * Lesser General Public License for more details.
 376  *
 377  * You should have received a copy of the GNU Lesser General Public
 378  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 379  */
 380
 381 static int poll_rest(gboolean poll_msgs, HANDLE *handles, gint nhandles,
 382                      GPollFD *fds, guint nfds, gint timeout)
 383 {
 384     DWORD ready;
 385     GPollFD *f;
 386     int recursed_result;
 387
 388     if (poll_msgs) {
 389         /* Wait for either messages or handles
 390          * -> Use MsgWaitForMultipleObjectsEx
 391          */
 392         ready = MsgWaitForMultipleObjectsEx(nhandles, handles, timeout,
 393                                             QS_ALLINPUT, MWMO_ALERTABLE);
 394
 395         if (ready == WAIT_FAILED) {
 396             gchar *emsg = g_win32_error_message(GetLastError());
 397             g_warning("MsgWaitForMultipleObjectsEx failed: %s", emsg);
 398             g_free(emsg);
 399         }
 400     } else if (nhandles == 0) {
 401         /* No handles to wait for, just the timeout */
 402         if (timeout == INFINITE) {
 403             ready = WAIT_FAILED;
 404         } else {
 405             SleepEx(timeout, TRUE);
 406             ready = WAIT_TIMEOUT;
 407         }
 408     } else {
 409         /* Wait for just handles
 410          * -> Use WaitForMultipleObjectsEx
 411          */
 412         ready =
 413             WaitForMultipleObjectsEx(nhandles, handles, FALSE, timeout, TRUE);
 414         if (ready == WAIT_FAILED) {
 415             gchar *emsg = g_win32_error_message(GetLastError());
 416             g_warning("WaitForMultipleObjectsEx failed: %s", emsg);
 417             g_free(emsg);
 418         }
 419     }
 420
 421     if (ready == WAIT_FAILED) {
 422         return -1;
 423     } else if (ready == WAIT_TIMEOUT || ready == WAIT_IO_COMPLETION) {
 424         return 0;
 425     } else if (poll_msgs && ready == WAIT_OBJECT_0 + nhandles) {
 426         for (f = fds; f < &fds[nfds]; ++f) {
 427             if (f->fd == G_WIN32_MSG_HANDLE && f->events & G_IO_IN) {
 428                 f->revents |= G_IO_IN;
 429             }
 430         }
 431
 432         /* If we have a timeout, or no handles to poll, be satisfied
 433          * with just noticing we have messages waiting.
 434          */
 435         if (timeout != 0 || nhandles == 0) {
 436             return 1;
 437         }
 438
 439         /* If no timeout and handles to poll, recurse to poll them,
 440          * too.
 441          */
 442         recursed_result = poll_rest(FALSE, handles, nhandles, fds, nfds, 0);
 443         return (recursed_result == -1) ? -1 : 1 + recursed_result;
 444     } else if (/* QEMU: removed the following unneeded statement which causes
 445                 * a compiler warning: ready >= WAIT_OBJECT_0 && */
 446                ready < WAIT_OBJECT_0 + nhandles) {
 447         for (f = fds; f < &fds[nfds]; ++f) {
 448             if ((HANDLE) f->fd == handles[ready - WAIT_OBJECT_0]) {
 449                 f->revents = f->events;
 450             }
 451         }
 452
 453         /* If no timeout and polling several handles, recurse to poll
 454          * the rest of them.
 455          */
 456         if (timeout == 0 && nhandles > 1) {
 457             /* Remove the handle that fired */
 458             int i;
 459             for (i = ready - WAIT_OBJECT_0 + 1; i < nhandles; i++) {
 460                 handles[i-1] = handles[i];
 461             }
 462             nhandles--;
 463             recursed_result = poll_rest(FALSE, handles, nhandles, fds, nfds, 0);
 464             return (recursed_result == -1) ? -1 : 1 + recursed_result;
 465         }
 466         return 1;
 467     }
 468
 469     return 0;
 470 }
 471
 472 gint g_poll(GPollFD *fds, guint nfds, gint timeout)
 473 {
 474     HANDLE handles[MAXIMUM_WAIT_OBJECTS];
 475     gboolean poll_msgs = FALSE;
 476     GPollFD *f;
 477     gint nhandles = 0;
 478     int retval;
 479
 480     for (f = fds; f < &fds[nfds]; ++f) {
 481         if (f->fd == G_WIN32_MSG_HANDLE && (f->events & G_IO_IN)) {
 482             poll_msgs = TRUE;
 483         } else if (f->fd > 0) {
 484             /* Don't add the same handle several times into the array, as
 485              * docs say that is not allowed, even if it actually does seem
 486              * to work.
 487              */
 488             gint i;
 489
 490             for (i = 0; i < nhandles; i++) {
 491                 if (handles[i] == (HANDLE) f->fd) {
 492                     break;
 493                 }
 494             }
 495
 496             if (i == nhandles) {
 497                 if (nhandles == MAXIMUM_WAIT_OBJECTS) {
 498                     g_warning("Too many handles to wait for!\n");
 499                     break;
 500                 } else {
 501                     handles[nhandles++] = (HANDLE) f->fd;
 502                 }
 503             }
 504         }
 505     }
 506
 507     for (f = fds; f < &fds[nfds]; ++f) {
 508         f->revents = 0;
 509     }
 510
 511     if (timeout == -1) {
 512         timeout = INFINITE;
 513     }
 514
 515     /* Polling for several things? */
 516     if (nhandles > 1 || (nhandles > 0 && poll_msgs)) {
 517         /* First check if one or several of them are immediately
 518          * available
 519          */
 520         retval = poll_rest(poll_msgs, handles, nhandles, fds, nfds, 0);
 521
 522         /* If not, and we have a significant timeout, poll again with
 523          * timeout then. Note that this will return indication for only
 524          * one event, or only for messages. We ignore timeouts less than
 525          * ten milliseconds as they are mostly pointless on Windows, the
 526          * MsgWaitForMultipleObjectsEx() call will timeout right away
 527          * anyway.
 528          *
 529          * Modification for QEMU: replaced timeout >= 10 by timeout > 0.
 530          */
 531         if (retval == 0 && (timeout == INFINITE || timeout > 0)) {
 532             retval = poll_rest(poll_msgs, handles, nhandles,
 533                                fds, nfds, timeout);
 534         }
 535     } else {
 536         /* Just polling for one thing, so no need to check first if
 537          * available immediately
 538          */
 539         retval = poll_rest(poll_msgs, handles, nhandles, fds, nfds, timeout);
 540     }
 541
 542     if (retval == -1) {
 543         for (f = fds; f < &fds[nfds]; ++f) {
 544             f->revents = 0;
 545         }
 546     }
 547
 548     return retval;
 549 }
 550 #endif
 551
 552 int getpagesize(void)
 553 {
 554     SYSTEM_INFO system_info;
 555
 556     GetSystemInfo(&system_info);
 557     return system_info.dwPageSize;
 558 }
 559
 560 void os_mem_prealloc(int fd, char *area, size_t memory, int smp_cpus,
 561                      Error **errp)
 562 {
 563     int i;
 564     size_t pagesize = qemu_real_host_page_size;
 565
 566     memory = (memory + pagesize - 1) & -pagesize;
 567     for (i = 0; i < memory / pagesize; i++) {
 568         memset(area + pagesize * i, 0, 1);
 569     }
 570 }
 571
 572 char *qemu_get_pid_name(pid_t pid)
 573 {
 574     /* XXX Implement me */
 575     abort();
 576 }
 577
 578
 579 pid_t qemu_fork(Error **errp)
 580 {
 581     errno = ENOSYS;
 582     error_setg_errno(errp, errno,
 583                      "cannot fork child process");
 584     return -1;
 585 }
 586
 587
 588 #undef connect
 589 int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
 590                       socklen_t addrlen)
 591 {
 592     int ret;
 593     ret = connect(sockfd, addr, addrlen);
 594     if (ret < 0) {
 595         if (WSAGetLastError() == WSAEWOULDBLOCK) {
 596             errno = EINPROGRESS;
 597         } else {
 598             errno = socket_error();
 599         }
 600     }
 601     return ret;
 602 }
 603
 604
 605 #undef listen
 606 int qemu_listen_wrap(int sockfd, int backlog)
 607 {
 608     int ret;
 609     ret = listen(sockfd, backlog);
 610     if (ret < 0) {
 611         errno = socket_error();
 612     }
 613     return ret;
 614 }
 615
 616
 617 #undef bind
 618 int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
 619                    socklen_t addrlen)
 620 {
 621     int ret;
 622     ret = bind(sockfd, addr, addrlen);
 623     if (ret < 0) {
 624         errno = socket_error();
 625     }
 626     return ret;
 627 }
 628
 629
 630 #undef socket
 631 int qemu_socket_wrap(int domain, int type, int protocol)
 632 {
 633     int ret;
 634     ret = socket(domain, type, protocol);
 635     if (ret < 0) {
 636         errno = socket_error();
 637     }
 638     return ret;
 639 }
 640
 641
 642 #undef accept
 643 int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
 644                      socklen_t *addrlen)
 645 {
 646     int ret;
 647     ret = accept(sockfd, addr, addrlen);
 648     if (ret < 0) {
 649         errno = socket_error();
 650     }
 651     return ret;
 652 }
 653
 654
 655 #undef shutdown
 656 int qemu_shutdown_wrap(int sockfd, int how)
 657 {
 658     int ret;
 659     ret = shutdown(sockfd, how);
 660     if (ret < 0) {
 661         errno = socket_error();
 662     }
 663     return ret;
 664 }
 665
 666
 667 #undef ioctlsocket
 668 int qemu_ioctlsocket_wrap(int fd, int req, void *val)
 669 {
 670     int ret;
 671     ret = ioctlsocket(fd, req, val);
 672     if (ret < 0) {
 673         errno = socket_error();
 674     }
 675     return ret;
 676 }
 677
 678
 679 #undef closesocket
 680 int qemu_closesocket_wrap(int fd)
 681 {
 682     int ret;
 683     ret = closesocket(fd);
 684     if (ret < 0) {
 685         errno = socket_error();
 686     }
 687     return ret;
 688 }
 689
 690
 691 #undef getsockopt
 692 int qemu_getsockopt_wrap(int sockfd, int level, int optname,
 693                          void *optval, socklen_t *optlen)
 694 {
 695     int ret;
 696     ret = getsockopt(sockfd, level, optname, optval, optlen);
 697     if (ret < 0) {
 698         errno = socket_error();
 699     }
 700     return ret;
 701 }
 702
 703
 704 #undef setsockopt
 705 int qemu_setsockopt_wrap(int sockfd, int level, int optname,
 706                          const void *optval, socklen_t optlen)
 707 {
 708     int ret;
 709     ret = setsockopt(sockfd, level, optname, optval, optlen);
 710     if (ret < 0) {
 711         errno = socket_error();
 712     }
 713     return ret;
 714 }
 715
 716
 717 #undef getpeername
 718 int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
 719                           socklen_t *addrlen)
 720 {
 721     int ret;
 722     ret = getpeername(sockfd, addr, addrlen);
 723     if (ret < 0) {
 724         errno = socket_error();
 725     }
 726     return ret;
 727 }
 728
 729
 730 #undef getsockname
 731 int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
 732                           socklen_t *addrlen)
 733 {
 734     int ret;
 735     ret = getsockname(sockfd, addr, addrlen);
 736     if (ret < 0) {
 737         errno = socket_error();
 738     }
 739     return ret;
 740 }
 741
 742
 743 #undef send
 744 ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags)
 745 {
 746     int ret;
 747     ret = send(sockfd, buf, len, flags);
 748     if (ret < 0) {
 749         errno = socket_error();
 750     }
 751     return ret;
 752 }
 753
 754
 755 #undef sendto
 756 ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
 757                          const struct sockaddr *addr, socklen_t addrlen)
 758 {
 759     int ret;
 760     ret = sendto(sockfd, buf, len, flags, addr, addrlen);
 761     if (ret < 0) {
 762         errno = socket_error();
 763     }
 764     return ret;
 765 }
 766
 767
 768 #undef recv
 769 ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags)
 770 {
 771     int ret;
 772     ret = recv(sockfd, buf, len, flags);
 773     if (ret < 0) {
 774         errno = socket_error();
 775     }
 776     return ret;
 777 }
 778
 779
 780 #undef recvfrom
 781 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
 782                            struct sockaddr *addr, socklen_t *addrlen)
 783 {
 784     int ret;
 785     ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
 786     if (ret < 0) {
 787         errno = socket_error();
 788     }
 789     return ret;
 790 }
 791
 792 bool qemu_write_pidfile(const char *filename, Error **errp)
 793 {
 794     char buffer[128];
 795     int len;
 796     HANDLE file;
 797     OVERLAPPED overlap;
 798     BOOL ret;
 799     memset(&overlap, 0, sizeof(overlap));
 800
 801     file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
 802                       OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
 803
 804     if (file == INVALID_HANDLE_VALUE) {
 805         error_setg(errp, "Failed to create PID file");
 806         return false;
 807     }
 808     len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", (pid_t)getpid());
 809     ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
 810                     NULL, &overlap);
 811     CloseHandle(file);
 812     if (ret == 0) {
 813         error_setg(errp, "Failed to write PID file");
 814         return false;
 815     }
 816     return true;
 817 }
 818
 819 char *qemu_get_host_name(Error **errp)
 820 {
 821     wchar_t tmp[MAX_COMPUTERNAME_LENGTH + 1];
 822     DWORD size = G_N_ELEMENTS(tmp);
 823
 824     if (GetComputerNameW(tmp, &size) == 0) {
 825         error_setg_win32(errp, GetLastError(), "failed close handle");
 826         return NULL;
 827     }
 828
 829     return g_utf16_to_utf8(tmp, size, NULL, NULL, NULL);
 830 }