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/*
* Emulator initialisation code
*
* Copyright 2000 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <fcntl.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dlfcn.h>
#include <limits.h>
#ifdef HAVE_SYS_SYSCTL_H
# include <sys/sysctl.h>
#endif
#include "main.h"
extern char **environ;
/* the preloader will set this variable */
const struct wine_preload_info *wine_main_preload_info = NULL;
/* canonicalize path and return its directory name */
static char *realpath_dirname( const char *name )
{
char *p, *fullpath = realpath( name, NULL );
if (fullpath)
{
p = strrchr( fullpath, '/' );
if (p == fullpath) p++;
if (p) *p = 0;
}
return fullpath;
}
/* if string ends with tail, remove it */
static char *remove_tail( const char *str, const char *tail )
{
size_t len = strlen( str );
size_t tail_len = strlen( tail );
char *ret;
if (len < tail_len) return NULL;
if (strcmp( str + len - tail_len, tail )) return NULL;
ret = malloc( len - tail_len + 1 );
memcpy( ret, str, len - tail_len );
ret[len - tail_len] = 0;
return ret;
}
/* build a path from the specified dir and name */
static char *build_path( const char *dir, const char *name )
{
size_t len = strlen( dir );
char *ret = malloc( len + strlen( name ) + 2 );
memcpy( ret, dir, len );
if (len && ret[len - 1] != '/') ret[len++] = '/';
strcpy( ret + len, name );
return ret;
}
static const char *get_self_exe( char *argv0 )
{
#if defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__)
return "/proc/self/exe";
#elif defined (__FreeBSD__) || defined(__DragonFly__)
static int pathname[] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
size_t path_size = PATH_MAX;
char *path = malloc( path_size );
if (path && !sysctl( pathname, sizeof(pathname)/sizeof(pathname[0]), path, &path_size, NULL, 0 ))
return path;
free( path );
#endif
if (!strchr( argv0, '/' )) /* search in PATH */
{
char *p, *path = getenv( "PATH" );
if (!path || !(path = strdup(path))) return NULL;
for (p = strtok( path, ":" ); p; p = strtok( NULL, ":" ))
{
char *name = build_path( p, argv0 );
if (!access( name, X_OK ))
{
free( path );
return name;
}
free( name );
}
free( path );
return NULL;
}
return argv0;
}
static void *try_dlopen( const char *dir, const char *name )
{
char *path = build_path( dir, name );
void *handle = dlopen( path, RTLD_NOW );
free( path );
return handle;
}
static void *load_ntdll( char *argv0 )
{
#ifdef __i386__
#define SO_DIR "i386-unix/"
#elif defined(__x86_64__)
#define SO_DIR "x86_64-unix/"
#elif defined(__arm__)
#define SO_DIR "arm-unix/"
#elif defined(__aarch64__)
#define SO_DIR "aarch64-unix/"
#else
#define SO_DIR ""
#endif
const char *self = get_self_exe( argv0 );
char *path, *p;
void *handle = NULL;
if (self && ((path = realpath_dirname( self ))))
{
if ((p = remove_tail( path, "/loader" )))
{
handle = try_dlopen( p, "dlls/ntdll/ntdll.so" );
free( p );
}
else handle = try_dlopen( path, BIN_TO_DLLDIR "/" SO_DIR "ntdll.so" );
free( path );
}
if (!handle && (path = getenv( "WINEDLLPATH" )))
{
path = strdup( path );
for (p = strtok( path, ":" ); p; p = strtok( NULL, ":" ))
{
handle = try_dlopen( p, SO_DIR "ntdll.so" );
if (!handle) handle = try_dlopen( p, "ntdll.so" );
if (handle) break;
}
free( path );
}
if (!handle && !self) handle = try_dlopen( DLLDIR, SO_DIR "ntdll.so" );
return handle;
}
/**********************************************************************
* main
*/
int main( int argc, char *argv[] )
{
void *handle;
if ((handle = load_ntdll( argv[0] )))
{
void (*init_func)(int, char **, char **) = dlsym( handle, "__wine_main" );
if (init_func) init_func( argc, argv, environ );
fprintf( stderr, "wine: __wine_main function not found in ntdll.so\n" );
exit(1);
}
fprintf( stderr, "wine: could not load ntdll.so: %s\n", dlerror() );
pthread_detach( pthread_self() ); /* force importing libpthread for OpenGL */
exit(1);
}
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