1/*
2 * os-win32.c
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2010 Red Hat, Inc.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25#include <windows.h>
26#include <unistd.h>
27#include <fcntl.h>
28#include <signal.h>
29#include <time.h>
30#include <errno.h>
31#include <sys/time.h>
32#include "config-host.h"
33#include "sysemu/sysemu.h"
34#include "qemu-options.h"
35
36/***********************************************************/
37/* Functions missing in mingw */
38
39int setenv(const char *name, const char *value, int overwrite)
40{
41    int result = 0;
42    if (overwrite || !getenv(name)) {
43        size_t length = strlen(name) + strlen(value) + 2;
44        char *string = g_malloc(length);
45        snprintf(string, length, "%s=%s", name, value);
46        result = putenv(string);
47    }
48    return result;
49}
50
51static BOOL WINAPI qemu_ctrl_handler(DWORD type)
52{
53    exit(STATUS_CONTROL_C_EXIT);
54    return TRUE;
55}
56
57void os_setup_early_signal_handling(void)
58{
59    /* Note: cpu_interrupt() is currently not SMP safe, so we force
60       QEMU to run on a single CPU */
61    HANDLE h;
62    DWORD_PTR mask, smask;
63    int i;
64
65    SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
66
67    h = GetCurrentProcess();
68    if (GetProcessAffinityMask(h, &mask, &smask)) {
69        for(i = 0; i < 32; i++) {
70            if (mask & (1 << i))
71                break;
72        }
73        if (i != 32) {
74            mask = 1 << i;
75            SetProcessAffinityMask(h, mask);
76        }
77    }
78}
79
80/* Look for support files in the same directory as the executable.  */
81char *os_find_datadir(const char *argv0)
82{
83    char *p;
84    char buf[MAX_PATH];
85    DWORD len;
86
87    len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
88    if (len == 0) {
89        return NULL;
90    }
91
92    buf[len] = 0;
93    p = buf + len - 1;
94    while (p != buf && *p != '\\')
95        p--;
96    *p = 0;
97    if (access(buf, R_OK) == 0) {
98        return g_strdup(buf);
99    }
100    return NULL;
101}
102
103void os_set_line_buffering(void)
104{
105    setbuf(stdout, NULL);
106    setbuf(stderr, NULL);
107}
108
109/*
110 * Parse OS specific command line options.
111 * return 0 if option handled, -1 otherwise
112 */
113void os_parse_cmd_args(int index, const char *optarg)
114{
115    return;
116}
117
118void os_pidfile_error(void)
119{
120    fprintf(stderr, "Could not acquire pid file: %s\n", strerror(errno));
121}
122
123int qemu_create_pidfile(const char *filename)
124{
125    char buffer[128];
126    int len;
127    HANDLE file;
128    OVERLAPPED overlap;
129    BOOL ret;
130    memset(&overlap, 0, sizeof(overlap));
131
132    file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
133		      OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
134
135    if (file == INVALID_HANDLE_VALUE) {
136        return -1;
137    }
138    len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
139    ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len,
140		      &overlap, NULL);
141    if (ret == 0) {
142        return -1;
143    }
144    return 0;
145}
146