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