/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1997-2011. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
/*
* Extra support for running the emulator on Windows.
* Most of this only used when beam is run as a separate process.
*/
#pragma comment(linker,"/manifestdependency:\"type='win32' "\
"name='Microsoft.Windows.Common-Controls' "\
"version='6.0.0.0' processorArchitecture='*' "\
"publicKeyToken='6595b64144ccf1df' language='*'\"")
#include <windows.h>
#include <winuser.h>
#include <wincon.h>
#include <process.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "sys.h"
#include "erl_driver.h"
extern int nohup;
extern int keep_window;
void error(char* format, ...);
/*
* Local functions.
*/
#define LOAD_BEAM_DYNAMICALLY 1
static int start(char* emu, char** argv);
static void start_winsock(void);
static char* last_error(void);
static char* last_wsa_error(void);
static char* win32_errorstr(int error);
static int has_console(void);
static char** fnuttify_argv(char **argv);
static void free_fnuttified(char **v);
static int windowed = 0;
#ifdef LOAD_BEAM_DYNAMICALLY
typedef int SysGetKeyFunction(int);
typedef void ErlStartFunction(int, char **);
typedef void SysPrimitiveInitFunction(HMODULE);
static SysGetKeyFunction *sys_get_key_p;
static ErlStartFunction *erl_start_p;
static SysPrimitiveInitFunction *sys_primitive_init_p;
static HMODULE load_win_beam_dll(char *name)
{
HMODULE beam_module;
beam_module=LoadLibrary(name);
if (beam_module == INVALID_HANDLE_VALUE || beam_module == NULL) {
error("Unable to load emulator DLL\n(%s)",name);
return NULL;
}
sys_get_key_p = (SysGetKeyFunction *)
GetProcAddress(beam_module, "sys_get_key");
erl_start_p = (ErlStartFunction *)
GetProcAddress(beam_module, "erl_start");
sys_primitive_init_p = (SysPrimitiveInitFunction *)
GetProcAddress(beam_module, "sys_primitive_init");
return beam_module;
}
#endif
#define DLL_ENV "ERL_EMULATOR_DLL"
static void
set_env(char *key, char *value)
{
if (!SetEnvironmentVariable((LPCTSTR) key, (LPCTSTR) value))
error("SetEnvironmentVariable(\"%s\", \"%s\") failed!", key, value);
}
static char *
get_env(char *key)
{
DWORD size = 32;
char *value = NULL;
while (1) {
DWORD nsz;
if (value)
free(value);
value = malloc(size);
if (!value)
error("GetEnvironmentVariable(\"%s\") failed", key);
SetLastError(0);
nsz = GetEnvironmentVariable((LPCTSTR) key, (LPTSTR) value, size);
if (nsz == 0 && GetLastError() == ERROR_ENVVAR_NOT_FOUND) {
free(value);
return NULL;
}
if (nsz <= size)
return value;
size = nsz;
}
}
free_env_val(char *value)
{
if (value)
free(value);
}
int
start_win_emulator(char* emu, char *start_prog, char** argv, int start_detached)
{
int result;
windowed = 1;
if (start_detached) {
char *buff;
close(0);
close(1);
close(2);
set_env("ERL_CONSOLE_MODE", "detached");
set_env(DLL_ENV, emu);
argv[0] = start_prog;
argv = fnuttify_argv(argv);
result = spawnv(_P_DETACH, start_prog, argv);
free_fnuttified(argv);
} else {
int argc = 0;
#ifdef LOAD_BEAM_DYNAMICALLY
HMODULE beam_module = load_win_beam_dll(emu);
#endif
set_env("ERL_CONSOLE_MODE", "window");
while (argv[argc] != NULL) {
++argc;
}
#ifdef ARGS_HARDDEBUG
{
char sbuf[2048] = "";
int i;
for (i = 0; i < argc; ++i) {
strcat(sbuf,"|");
strcat(sbuf, argv[i]);
strcat(sbuf,"| ");
}
MessageBox(NULL, sbuf, "Werl", MB_OK|MB_ICONERROR);
}
#endif
#ifdef LOAD_BEAM_DYNAMICALLY
(*sys_primitive_init_p)(beam_module);
(*erl_start_p)(argc,argv);
#else
erl_start(argc, argv);
#endif
result = 0;
}
if (result == -1) {
error("Failed to execute %s: %s", emu, win32_errorstr(_doserrno));
}
return 0;
}
void __cdecl
do_keep_window(void)
{
printf("\nPress any key to close window.\n");
#ifdef LOAD_BEAM_DYNAMICALLY
(*sys_get_key_p)(0);
#else
sys_get_key(0);
#endif
}
int
start_emulator(char* emu, char *start_prog, char** argv, int start_detached)
{
int result;
static char console_mode[] = "tty:ccc";
char* fd_type;
char* title;
#ifdef HARDDEBUG
fprintf(stderr,"emu = %s, start_prog = %s\n",emu, start_prog);
#endif
fd_type = strchr(console_mode, ':');
fd_type++;
_flushall();
/*
* If no console, we will spawn the emulator detached.
*/
if (start_detached) {
char *buff;
close(0);
close(1);
close(2);
set_env("ERL_CONSOLE_MODE", "detached");
set_env(DLL_ENV, emu);
argv[0] = start_prog;
argv = fnuttify_argv(argv);
#ifdef ARGS_HARDDEBUG
{
char buffer[2048];
int i;
sprintf(buffer,"Start detached [%s]\n",start_prog);
for(i=0;argv[i] != NULL;++i) {
strcat(buffer,"|");
strcat(buffer,argv[i]);
strcat(buffer,"|\n");
}
MessageBox(NULL, buffer,"Start detached",MB_OK);
}
#endif
result = spawnv(_P_DETACH, start_prog, argv);
free_fnuttified(argv);
if (result == -1) {
#ifdef ARGS_HARDDEBUG
MessageBox(NULL, "_spawnv failed","Start detached",MB_OK);
#endif
return 1;
}
SetPriorityClass((HANDLE) result, GetPriorityClass(GetCurrentProcess()));
} else {
int argc = 0;
#ifdef LOAD_BEAM_DYNAMICALLY
HMODULE beam_module = load_win_beam_dll(emu);
#endif
/*
* Start the emulator.
*/
title = get_env("ERL_WINDOW_TITLE");
if (title) {
SetConsoleTitle(title);
}
free_env_val(title);
set_env("ERL_CONSOLE_MODE", console_mode);
while (argv[argc] != NULL) {
++argc;
}
if (keep_window) {
atexit(do_keep_window);
}
#ifdef ARGS_HARDDEBUG
{
char sbuf[2048] = "";
int i;
for (i = 0; i < argc; ++i) {
strcat(sbuf,"|");
strcat(sbuf, argv[i]);
strcat(sbuf,"|\n");
}
MessageBox(NULL, sbuf, "erl", MB_OK);
}
#endif
#ifdef LOAD_BEAM_DYNAMICALLY
(*sys_primitive_init_p)(beam_module);
(*erl_start_p)(argc,argv);
#else
erl_start(argc, argv);
#endif
}
return 0;
}
void
error(char* format, ...)
{
char sbuf[2048];
va_list ap;
va_start(ap, format);
vsprintf(sbuf, format, ap);
va_end(ap);
if (!windowed && has_console()) {
fprintf(stderr, "%s\n", sbuf);
} else {
MessageBox(NULL, sbuf, "Werl", MB_OK|MB_ICONERROR);
}
exit(1);
}
static char*
last_error(void)
{
return win32_errorstr(GetLastError());
}
/*
* Returns a human-readable description of the last error.
* The returned pointer will be valid only as long as last-error()
* isn't called again.
*/
static char*
win32_errorstr(int error)
{
static LPTSTR lpBufPtr = NULL;
if (lpBufPtr)
LocalFree(lpBufPtr);
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
error,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpBufPtr,
0,
NULL);
SetLastError(error);
return lpBufPtr;
}
static int
has_console(void)
{
HANDLE handle = CreateFile("CONOUT$", GENERIC_WRITE, FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (handle != INVALID_HANDLE_VALUE) {
CloseHandle(handle);
return 1;
} else {
return 0;
}
}
static char** fnuttify_argv(char **argv)
{
char **v;
char *p;
char *q;
int c;
int i;
int n;
int m;
for (c = 0; argv[c]; ++c)
;
v = malloc(sizeof(char *) * (c+1));
v[c] = NULL;
for (i = 0; i < c; ++i) {
p = argv[i];
n = m = 0;
while (*p) {
if (*p == ' ') {
m = 2;
} else if (*p == '"') {
m = 2;
++n;
}
++p;
}
v[i] = malloc((p - argv[i]) + 1 + n + m);
p = argv[i];
q = v[i];
if (n || m) {
if (m) {
*q++ = '"';
}
while (*p) {
if (*p == '"') {
*q++ = '\\';
}
*q++ = *p++;
}
if (m) {
*q++ = '"';
}
*q = '\0';
} else {
strcpy(q,p);
}
}
return v;
}
static void free_fnuttified(char **v)
{
char **t = v;
while(*t) {
free(*t);
++t;
}
free(v);
}
