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 <mmsystem.h> 27 #include <unistd.h> 28 #include <fcntl.h> 29 #include <signal.h> 30 #include <time.h> 31 #include <errno.h> 32 #include <sys/time.h> 33 #include "config-host.h" 34 #include "sysemu/sysemu.h" 35 #include "qemu-options.h" 36 37 /***********************************************************/ 38 /* Functions missing in mingw */ 39 40 int setenv(const char *name, const char *value, int overwrite) 41 { 42 int result = 0; 43 if (overwrite || !getenv(name)) { 44 size_t length = strlen(name) + strlen(value) + 2; 45 char *string = g_malloc(length); 46 snprintf(string, length, "%s=%s", name, value); 47 result = putenv(string); 48 49 /* Windows takes a copy and does not continue to use our string. 50 * Therefore it can be safely freed on this platform. POSIX code 51 * typically has to leak the string because according to the spec it 52 * becomes part of the environment. 53 */ 54 g_free(string); 55 } 56 return result; 57 } 58 59 static BOOL WINAPI qemu_ctrl_handler(DWORD type) 60 { 61 qemu_system_shutdown_request(); 62 /* Windows 7 kills application when the function returns. 63 Sleep here to give QEMU a try for closing. 64 Sleep period is 10000ms because Windows kills the program 65 after 10 seconds anyway. */ 66 Sleep(10000); 67 68 return TRUE; 69 } 70 71 static TIMECAPS mm_tc; 72 73 static void os_undo_timer_resolution(void) 74 { 75 timeEndPeriod(mm_tc.wPeriodMin); 76 } 77 78 void os_setup_early_signal_handling(void) 79 { 80 SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE); 81 timeGetDevCaps(&mm_tc, sizeof(mm_tc)); 82 timeBeginPeriod(mm_tc.wPeriodMin); 83 atexit(os_undo_timer_resolution); 84 } 85 86 /* Look for support files in the same directory as the executable. */ 87 char *os_find_datadir(const char *argv0) 88 { 89 char *p; 90 char buf[MAX_PATH]; 91 DWORD len; 92 93 len = GetModuleFileName(NULL, buf, sizeof(buf) - 1); 94 if (len == 0) { 95 return NULL; 96 } 97 98 buf[len] = 0; 99 p = buf + len - 1; 100 while (p != buf && *p != '\\') 101 p--; 102 *p = 0; 103 if (access(buf, R_OK) == 0) { 104 return g_strdup(buf); 105 } 106 return NULL; 107 } 108 109 void os_set_line_buffering(void) 110 { 111 setbuf(stdout, NULL); 112 setbuf(stderr, NULL); 113 } 114 115 /* 116 * Parse OS specific command line options. 117 * return 0 if option handled, -1 otherwise 118 */ 119 void os_parse_cmd_args(int index, const char *optarg) 120 { 121 return; 122 } 123 124 void os_pidfile_error(void) 125 { 126 fprintf(stderr, "Could not acquire pid file: %s\n", strerror(errno)); 127 } 128 129 int qemu_create_pidfile(const char *filename) 130 { 131 char buffer[128]; 132 int len; 133 HANDLE file; 134 OVERLAPPED overlap; 135 BOOL ret; 136 memset(&overlap, 0, sizeof(overlap)); 137 138 file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL, 139 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); 140 141 if (file == INVALID_HANDLE_VALUE) { 142 return -1; 143 } 144 len = snprintf(buffer, sizeof(buffer), "%d\n", getpid()); 145 ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len, 146 NULL, &overlap); 147 CloseHandle(file); 148 if (ret == 0) { 149 return -1; 150 } 151 return 0; 152 } 153