s390x/sclpconsole-lm: truncate input if line is too long
[qemu.git] / os-win32.c
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(void)
88 {
89 return qemu_get_exec_dir();
90 }
91
92 void os_set_line_buffering(void)
93 {
94 setbuf(stdout, NULL);
95 setbuf(stderr, NULL);
96 }
97
98 /*
99 * Parse OS specific command line options.
100 * return 0 if option handled, -1 otherwise
101 */
102 void os_parse_cmd_args(int index, const char *optarg)
103 {
104 return;
105 }
106
107 int qemu_create_pidfile(const char *filename)
108 {
109 char buffer[128];
110 int len;
111 HANDLE file;
112 OVERLAPPED overlap;
113 BOOL ret;
114 memset(&overlap, 0, sizeof(overlap));
115
116 file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
117 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
118
119 if (file == INVALID_HANDLE_VALUE) {
120 return -1;
121 }
122 len = snprintf(buffer, sizeof(buffer), "%d\n", getpid());
123 ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
124 NULL, &overlap);
125 CloseHandle(file);
126 if (ret == 0) {
127 return -1;
128 }
129 return 0;
130 }