Urlader/urlader.c

#ifndef URLADER
# define URLADER "urlader"
#endif
#define URLADER_VERSION "1.0"

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <time.h>
#include <fcntl.h>

#include "liblzf/lzf_d.c"

#define TAIL_MAGIC "SCHMORPPACK0"

#ifdef _WIN32

   #include <windows.h>
   //#include <winbase.h>
   #include <shlobj.h>
   #include <shlwapi.h>
   #include <wininet.h>

   static DWORD dword;

   #define u_handle HANDLE
   #define u_setenv(name,value) SetEnvironmentVariable (name, value)
   #define u_mkdir(path) !CreateDirectory (path, NULL)
   #define u_chdir(path) !SetCurrentDirectory (path)
   #define u_rename(fr,to) !MoveFile (fr, to)
   #define u_open(path) CreateFile (path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL)
   #define u_creat(path,exec) CreateFile (path, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, NULL)
   #define u_close(handle) CloseHandle (handle)
   #define u_append(path,add) PathAppend (path, add)
   #define u_write(handle,data,len) (WriteFile (handle, data, len, &dword, 0) ? dword : -1)

#else

   #include <sys/mman.h>
   #include <sys/types.h>
   #include <pwd.h>

   #ifdef PATH_MAX
     #define MAX_PATH (PATH_MAX < 4096 ? 4096 : PATH_MAX)
   #else
     #define MAX_PATH 4096
   #endif

   #define u_handle int
   #define u_setenv(name,value) setenv (name, value, 1)
   #define u_mkdir(path) mkdir (path, 0777)
   #define u_chdir(path) chdir (path)
   #define u_rename(fr,to) rename (fr, to)
   #define u_open(path) open (path, O_RDONLY) + 1
   #define u_creat(path,exec) open (path, O_WRONLY | O_CREAT | O_TRUNC, (exec) ? 0777 : 0666) + 1
   #define u_close(handle) close (handle - 1)
   #define u_append(path,add) strcat (strcat (path, "/"), add)
   #define u_write(handle,data,len) write ((handle) - 1, data, len)

#endif

#define u_16(ptr) (((ptr)[0] << 8) | (ptr)[1])
#define u_32(ptr) (((ptr)[0] << 24) | ((ptr)[1] << 16) | ((ptr)[2] << 8) | (ptr)[3])

static u_handle pack_handle;
static char tmppath[MAX_PATH];
static char currdir[MAX_PATH];
static char datadir[MAX_PATH];  // %AppData%/urlader
static char exe_dir[MAX_PATH];  // %AppData%/urlader/EXE_ID
static char execdir[MAX_PATH];  // %AppData%/urlader/EXE_ID/EXE_VER
static char exe_id[MAX_PATH];
static char exe_ver[MAX_PATH];

static int exe_argc;
static const char *exe_argv[32];

static void
fatal (const char *msg)
{
#ifdef _WIN32
  MessageBox (0, msg, URLADER, 0);
#else
  fprintf (stderr, "%s: %s\n", URLADER, msg);
#endif

  _exit (1);
}

static void
tmpdir (const char *dir)
{
  static int cnt;

  for (;;)
    {
//      #ifdef _WIN32
//        sprintf (tmppath, "%s/%x_%x.tmp", dir, (unsigned int)GetCurrentProcessId (), ++cnt);
//      #else
        sprintf (tmppath, "%s/t-%x_%x.tmp", dir, (unsigned int)getpid ()             , ++cnt);
//      #endif

      if (!u_mkdir (tmppath))
        return;
    }
}

static void
systemv (const char *const argv[], int dowait)
{
#ifdef _WIN32
  _spawnv (P_WAIT, argv [0], argv);
#else
  pid_t pid = dowait ? fork () : 0;

  if (pid < 0)
    fatal ("fork failure");

  if (!pid)
    {
      execv (argv [0], (void *)argv);
      _exit (124);
    }

  int status;
  waitpid (pid, &status, 0);
#endif
}

static void
deltree (const char *path)
{
  #ifdef _WIN32
    char buf[MAX_PATH * 2 + 64];
    const char *argv[] = { getenv ("COMSPEC"), "/c", "rd", "/s", "/q", buf, 0 };
    sprintf (buf, "\"%s\"", path);
  #else
    const char *argv[] = { "/bin/rm", "-rf", path, 0 };
  #endif
  systemv (argv, 1);
}

enum
{
  T_NULL, // 5
  T_META, // 1 : exe_id, exe_ver
  T_ARG,  // 2 : arg
  T_ENV,  // 3 : name, value
  T_DIR,  // 4+: path
  T_FILE, // 4+: path, data
  T_NUM
};

enum
{
  F_EXEC = 1,
  F_LZF  = 2,
  F_NULL = 0
};

struct hdr
{
  unsigned char type;
  unsigned char flags;
  unsigned char namelen[2];
  unsigned char datalen[4];
};

struct tail {
  unsigned char max_filesize[4];
  unsigned char size[4];
  char magic[12];
};

static char *pack_base, *pack_end;
static struct hdr *pack_cur;
static char *scratch;
static unsigned int scratch_len;

#define PACK_NAME ((char *)(pack_cur + 1))
#define PACK_DATA (PACK_NAME + u_16 (pack_cur->namelen) + 1)
#define PACK_VALID pack_cur->type

static void
pack_next (void)
{
  unsigned int d = u_32 (pack_cur->datalen);

  pack_cur = (struct hdr *)(PACK_DATA + d);
}

static void
pack_unmap (void)
{
  if (!pack_base)
    return;

  free (scratch);

#ifdef _WIN32
  UnmapViewOfFile (pack_base);
#else
  munmap (pack_base, pack_end - pack_base);
#endif
}

static int
pack_map (void)
{
#ifdef _WIN32
  BY_HANDLE_FILE_INFORMATION fi;

  if (!GetFileInformationByHandle (pack_handle, &fi))
    return 0;

  if (fi.nFileSizeHigh) // too big
    return 0;

  HANDLE handle = CreateFileMapping (pack_handle, 0, PAGE_READONLY, 0, fi.nFileSizeLow, NULL);

  if (!handle)
    return 0;

  pack_unmap ();

  pack_base = MapViewOfFile (handle, FILE_MAP_READ, 0, 0, fi.nFileSizeLow);

  CloseHandle (handle);

  pack_end  = pack_base + fi.nFileSizeLow;
#else
  off_t len = lseek (pack_handle - 1, 0, SEEK_END);

  pack_unmap ();

  pack_base = mmap (0, len, PROT_READ, MAP_SHARED, pack_handle - 1, 0);
  if (pack_base == (void *)-1)
    pack_base = 0;

  pack_end = pack_base + len;
#endif

  if (!pack_base)
    return 0;

  struct tail *tail;

  tail = (void *)(pack_end - sizeof (*tail));

  if (memcmp (tail->magic, TAIL_MAGIC, sizeof (TAIL_MAGIC) - 1))
    return 0;

  pack_cur = (struct hdr *)(pack_end - u_32 (tail->size));

  free (scratch);
  scratch = malloc (scratch_len = u_32 (tail->max_filesize));

  return 1;
}

static void
exe_info (void)
{
  if (!pack_map ())
    fatal ("unable to locate packfile in executable - executable corrupted?");

  if (pack_cur->type != T_META)
    fatal ("unable to locate executable metadata - executable corrupted?");

  strcpy (exe_id, PACK_NAME);
}

static void
load (void)
{
  u_mkdir (datadir);

  strcpy (exe_dir, datadir);
  u_append (exe_dir, exe_id);
  u_mkdir (exe_dir);

  if (u_chdir (exe_dir))
    fatal ("unable to change to application data directory");

  u_handle h = u_open ("override");
  if (h)
    {
      u_handle oh = pack_handle;

      pack_handle = h;
      if (!pack_map ())
        {
          pack_handle = oh;
          oh = h;
        }

      u_close (oh);
    }

  if (pack_cur->type != T_META)
    fatal ("unable to locate override metadata");

  strcpy (exe_ver, PACK_DATA);
  pack_next ();

  while (pack_cur->type == T_ARG)
    {
      exe_argv [exe_argc++] = strdup (PACK_NAME);
      pack_next ();
    }

  while (pack_cur->type == T_ENV)
    {
      u_setenv (PACK_NAME, PACK_DATA);
      pack_next ();
    }

  strcpy (execdir, exe_dir);
  u_append (execdir, "i-");
  strcat (execdir, exe_ver);

  if (access (execdir, F_OK))
    {
      // does not exist yet, so unpack and move
      tmpdir (exe_dir);

      if (u_chdir (tmppath))
        fatal ("unable to change to new instance directory");

      for (;;)
        {
          switch (pack_cur->type)
            {
              case T_DIR:
                u_mkdir (PACK_NAME);
                break;

              case T_FILE:
                {
                  u_handle h = u_creat (PACK_NAME, pack_cur->flags & F_EXEC);
                  unsigned int dlen, len = u_32 (pack_cur->datalen);
                  char *data = PACK_DATA;

                  if (pack_cur->flags & F_LZF)
                    if (dlen = lzf_decompress (data, len, scratch, scratch_len))
                      {
                        data = scratch;
                        len  = dlen;
                      }
                    else
                      fatal ("unable to uncompress file data - pack corrupted?");

                  if (!h)
                    fatal ("unable to unpack file from packfile - disk full?");

                  if (u_write (h, data, len) != len)
                    fatal ("unable to unpack file from packfile - disk full?");

                  u_close (h);
                }
                break;

              case T_NULL:
                goto done;
            }

          pack_next ();
        }

done:
      if (u_chdir (datadir))
        fatal ("unable to change to data directory");

      if (u_rename (tmppath, execdir))
        deltree (tmppath); // if move fails, delete new, assume other process created it independently
    }

  pack_unmap ();
  u_close (pack_handle);

  if (u_chdir (execdir))
    fatal ("unable to change to application instance directory");

  u_setenv ("URLADER_VERSION", URLADER_VERSION);
  u_setenv ("URLADER_DATADIR", datadir);
  u_setenv ("URLADER_EXECDIR", execdir);
  u_setenv ("URLADER_EXE_ID" , exe_id);
  u_setenv ("URLADER_EXE_DIR", exe_dir);
  u_setenv ("URLADER_EXE_VER", exe_ver);

  // yes, this is overkill
  u_setenv ("SHLIB_PATH"        , execdir); // hpux
  u_setenv ("LIBPATH"           , execdir); // aix
  u_setenv ("LD_LIBRARY_PATH"   , execdir); // most elf systems
  u_setenv ("LD_LIBRARY_PATH_32", execdir); // solaris
  u_setenv ("LD_LIBRARY_PATH_64", execdir); // solaris
  u_setenv ("LD_LIBRARYN32_PATH", execdir); // irix
  u_setenv ("LD_LIBRARY64_PATH" , execdir); // irix
  u_setenv ("DYLD_LIBRARY_PATH" , execdir); // os sucks from apple
}

static void
execute (void)
{
  exe_argv [exe_argc] = 0;
  systemv (exe_argv, 0);
}

#ifdef _WIN32

int APIENTRY
WinMain (HINSTANCE hI, HINSTANCE hP, LPSTR argv, int command_show)
{
  if (!GetModuleFileName (hI, tmppath, sizeof (tmppath)))
    fatal ("unable to find executable pack");

  if (!(pack_handle = u_open (tmppath)))
    fatal ("unable to open executable pack");

  exe_info ();

  if (!GetCurrentDirectory (sizeof (currdir), currdir))
    strcpy (currdir, ".");

  if (SHGetFolderPath (0, CSIDL_APPDATA | CSIDL_FLAG_CREATE, NULL, SHGFP_TYPE_CURRENT, datadir) != S_OK)
    fatal ("unable to find application data directory");

  u_mkdir (datadir);
  u_append (datadir, URLADER);

  load ();
  execute ();

  return 0;
}

#else

int
main (int argc, char *argv[])
{
  char *home = getenv ("HOME");

  // we assume fd 0 and 2 are "normal"

  if (!(pack_handle = u_open (argv [0])))
    fatal ("unable to open executable pack");

  exe_info ();

  if (!home)
    {
      struct passwd *pw;

      if ((pw = getpwuid (getuid ())))
        home = pw->pw_dir;
      else
        home = "/tmp";
    }

  if (!getcwd (currdir, sizeof (currdir)))
    strcpy (currdir, ".");

  u_mkdir (home);
  sprintf (datadir, "%s/.%s", home, URLADER);
  u_mkdir (datadir);

  if (gethostname (tmppath, sizeof (tmppath)))
    strcpy (tmppath, "default");

  u_append (datadir, tmppath);

  load ();
  execute ();

  return 0;
}

#endif

Revision:	1.2
Committed:	Thu Dec 29 10:20:56 2011 UTC (12 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+33 -16 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#ifndef URLADER
2			# define URLADER "urlader"
3			#endif
4			#define URLADER_VERSION "1.0"
5
6			#include <stdio.h>
7			#include <stdlib.h>
8			#include <unistd.h>
9			#include <errno.h>
10			#include <string.h>
11			#include <time.h>
12			#include <fcntl.h>
13
14	root	1.2	#include "liblzf/lzf_d.c"
15	root	1.1
16			#define TAIL_MAGIC "SCHMORPPACK0"
17
18			#ifdef _WIN32
19
20			#include <windows.h>
21			//#include <winbase.h>
22			#include <shlobj.h>
23			#include <shlwapi.h>
24			#include <wininet.h>
25
26			static DWORD dword;
27
28			#define u_handle HANDLE
29			#define u_setenv(name,value) SetEnvironmentVariable (name, value)
30			#define u_mkdir(path) !CreateDirectory (path, NULL)
31			#define u_chdir(path) !SetCurrentDirectory (path)
32			#define u_rename(fr,to) !MoveFile (fr, to)
33			#define u_open(path) CreateFile (path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL \| FILE_FLAG_SEQUENTIAL_SCAN, NULL)
34			#define u_creat(path,exec) CreateFile (path, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL \| FILE_FLAG_SEQUENTIAL_SCAN, NULL)
35			#define u_close(handle) CloseHandle (handle)
36			#define u_append(path,add) PathAppend (path, add)
37			#define u_write(handle,data,len) (WriteFile (handle, data, len, &dword, 0) ? dword : -1)
38
39			#else
40
41			#include <sys/mman.h>
42			#include <sys/types.h>
43			#include <pwd.h>
44
45			#ifdef PATH_MAX
46			#define MAX_PATH (PATH_MAX < 4096 ? 4096 : PATH_MAX)
47			#else
48			#define MAX_PATH 4096
49			#endif
50
51			#define u_handle int
52			#define u_setenv(name,value) setenv (name, value, 1)
53			#define u_mkdir(path) mkdir (path, 0777)
54			#define u_chdir(path) chdir (path)
55			#define u_rename(fr,to) rename (fr, to)
56			#define u_open(path) open (path, O_RDONLY) + 1
57			#define u_creat(path,exec) open (path, O_WRONLY \| O_CREAT \| O_TRUNC, (exec) ? 0777 : 0666) + 1
58			#define u_close(handle) close (handle - 1)
59			#define u_append(path,add) strcat (strcat (path, "/"), add)
60			#define u_write(handle,data,len) write ((handle) - 1, data, len)
61
62			#endif
63
64			#define u_16(ptr) (((ptr)[0] << 8) \| (ptr)[1])
65			#define u_32(ptr) (((ptr)[0] << 24) \| ((ptr)[1] << 16) \| ((ptr)[2] << 8) \| (ptr)[3])
66
67			static u_handle pack_handle;
68			static char tmppath[MAX_PATH];
69			static char currdir[MAX_PATH];
70			static char datadir[MAX_PATH]; // %AppData%/urlader
71			static char exe_dir[MAX_PATH]; // %AppData%/urlader/EXE_ID
72			static char execdir[MAX_PATH]; // %AppData%/urlader/EXE_ID/EXE_VER
73			static char exe_id[MAX_PATH];
74			static char exe_ver[MAX_PATH];
75
76			static int exe_argc;
77			static const char *exe_argv[32];
78
79			static void
80			fatal (const char *msg)
81			{
82			#ifdef _WIN32
83			MessageBox (0, msg, URLADER, 0);
84			#else
85			fprintf (stderr, "%s: %s\n", URLADER, msg);
86			#endif
87
88			_exit (1);
89			}
90
91			static void
92			tmpdir (const char *dir)
93			{
94			static int cnt;
95
96			for (;;)
97			{
98			// #ifdef _WIN32
99			// sprintf (tmppath, "%s/%x_%x.tmp", dir, (unsigned int)GetCurrentProcessId (), ++cnt);
100			// #else
101			sprintf (tmppath, "%s/t-%x_%x.tmp", dir, (unsigned int)getpid () , ++cnt);
102			// #endif
103
104			if (!u_mkdir (tmppath))
105			return;
106			}
107			}
108
109			static void
110	root	1.2	systemv (const char *const argv[], int dowait)
111	root	1.1	{
112			#ifdef _WIN32
113			_spawnv (P_WAIT, argv [0], argv);
114			#else
115	root	1.2	pid_t pid = dowait ? fork () : 0;
116	root	1.1
117			if (pid < 0)
118			fatal ("fork failure");
119
120			if (!pid)
121			{
122			execv (argv [0], (void *)argv);
123			_exit (124);
124			}
125
126			int status;
127			waitpid (pid, &status, 0);
128			#endif
129			}
130
131			static void
132			deltree (const char *path)
133			{
134			#ifdef _WIN32
135			char buf[MAX_PATH * 2 + 64];
136			const char *argv[] = { getenv ("COMSPEC"), "/c", "rd", "/s", "/q", buf, 0 };
137			sprintf (buf, "\"%s\"", path);
138			#else
139			const char *argv[] = { "/bin/rm", "-rf", path, 0 };
140			#endif
141	root	1.2	systemv (argv, 1);
142	root	1.1	}
143
144			enum
145			{
146			T_NULL, // 5
147			T_META, // 1 : exe_id, exe_ver
148			T_ARG, // 2 : arg
149			T_ENV, // 3 : name, value
150			T_DIR, // 4+: path
151			T_FILE, // 4+: path, data
152			T_NUM
153			};
154
155			enum
156			{
157			F_EXEC = 1,
158			F_LZF = 2,
159			F_NULL = 0
160			};
161
162			struct hdr
163			{
164			unsigned char type;
165			unsigned char flags;
166			unsigned char namelen[2];
167			unsigned char datalen[4];
168			};
169
170			struct tail {
171			unsigned char max_filesize[4];
172			unsigned char size[4];
173			char magic[12];
174			};
175
176			static char pack_base, pack_end;
177			static struct hdr *pack_cur;
178	root	1.2	static char *scratch;
179			static unsigned int scratch_len;
180	root	1.1
181			#define PACK_NAME ((char *)(pack_cur + 1))
182			#define PACK_DATA (PACK_NAME + u_16 (pack_cur->namelen) + 1)
183			#define PACK_VALID pack_cur->type
184
185			static void
186			pack_next (void)
187			{
188			unsigned int d = u_32 (pack_cur->datalen);
189
190			pack_cur = (struct hdr *)(PACK_DATA + d);
191			}
192
193			static void
194			pack_unmap (void)
195			{
196			if (!pack_base)
197			return;
198
199	root	1.2	free (scratch);
200
201	root	1.1	#ifdef _WIN32
202			UnmapViewOfFile (pack_base);
203			#else
204			munmap (pack_base, pack_end - pack_base);
205			#endif
206			}
207
208			static int
209			pack_map (void)
210			{
211			#ifdef _WIN32
212			BY_HANDLE_FILE_INFORMATION fi;
213
214			if (!GetFileInformationByHandle (pack_handle, &fi))
215			return 0;
216
217			if (fi.nFileSizeHigh) // too big
218			return 0;
219
220			HANDLE handle = CreateFileMapping (pack_handle, 0, PAGE_READONLY, 0, fi.nFileSizeLow, NULL);
221
222			if (!handle)
223			return 0;
224
225			pack_unmap ();
226
227			pack_base = MapViewOfFile (handle, FILE_MAP_READ, 0, 0, fi.nFileSizeLow);
228
229			CloseHandle (handle);
230
231			pack_end = pack_base + fi.nFileSizeLow;
232			#else
233			off_t len = lseek (pack_handle - 1, 0, SEEK_END);
234
235			pack_unmap ();
236
237			pack_base = mmap (0, len, PROT_READ, MAP_SHARED, pack_handle - 1, 0);
238			if (pack_base == (void *)-1)
239			pack_base = 0;
240
241			pack_end = pack_base + len;
242			#endif
243
244			if (!pack_base)
245			return 0;
246
247			struct tail *tail;
248
249			tail = (void )(pack_end - sizeof (tail));
250
251			if (memcmp (tail->magic, TAIL_MAGIC, sizeof (TAIL_MAGIC) - 1))
252			return 0;
253
254			pack_cur = (struct hdr *)(pack_end - u_32 (tail->size));
255
256	root	1.2	free (scratch);
257			scratch = malloc (scratch_len = u_32 (tail->max_filesize));
258
259	root	1.1	return 1;
260			}
261
262			static void
263			exe_info (void)
264			{
265			if (!pack_map ())
266			fatal ("unable to locate packfile in executable - executable corrupted?");
267
268			if (pack_cur->type != T_META)
269			fatal ("unable to locate executable metadata - executable corrupted?");
270
271			strcpy (exe_id, PACK_NAME);
272			}
273
274			static void
275			load (void)
276			{
277			u_mkdir (datadir);
278
279			strcpy (exe_dir, datadir);
280			u_append (exe_dir, exe_id);
281			u_mkdir (exe_dir);
282
283			if (u_chdir (exe_dir))
284			fatal ("unable to change to application data directory");
285
286			u_handle h = u_open ("override");
287			if (h)
288			{
289			u_handle oh = pack_handle;
290
291			pack_handle = h;
292			if (!pack_map ())
293			{
294			pack_handle = oh;
295			oh = h;
296			}
297
298			u_close (oh);
299			}
300
301			if (pack_cur->type != T_META)
302			fatal ("unable to locate override metadata");
303
304			strcpy (exe_ver, PACK_DATA);
305			pack_next ();
306
307			while (pack_cur->type == T_ARG)
308			{
309			exe_argv [exe_argc++] = strdup (PACK_NAME);
310			pack_next ();
311			}
312
313			while (pack_cur->type == T_ENV)
314			{
315			u_setenv (PACK_NAME, PACK_DATA);
316			pack_next ();
317			}
318
319			strcpy (execdir, exe_dir);
320			u_append (execdir, "i-");
321			strcat (execdir, exe_ver);
322
323			if (access (execdir, F_OK))
324			{
325			// does not exist yet, so unpack and move
326			tmpdir (exe_dir);
327
328			if (u_chdir (tmppath))
329			fatal ("unable to change to new instance directory");
330
331			for (;;)
332			{
333			switch (pack_cur->type)
334			{
335			case T_DIR:
336			u_mkdir (PACK_NAME);
337			break;
338
339			case T_FILE:
340			{
341			u_handle h = u_creat (PACK_NAME, pack_cur->flags & F_EXEC);
342	root	1.2	unsigned int dlen, len = u_32 (pack_cur->datalen);
343			char *data = PACK_DATA;
344
345			if (pack_cur->flags & F_LZF)
346			if (dlen = lzf_decompress (data, len, scratch, scratch_len))
347			{
348			data = scratch;
349			len = dlen;
350			}
351			else
352			fatal ("unable to uncompress file data - pack corrupted?");
353	root	1.1
354			if (!h)
355			fatal ("unable to unpack file from packfile - disk full?");
356
357	root	1.2	if (u_write (h, data, len) != len)
358	root	1.1	fatal ("unable to unpack file from packfile - disk full?");
359
360			u_close (h);
361			}
362			break;
363
364			case T_NULL:
365			goto done;
366			}
367
368			pack_next ();
369			}
370
371			done:
372			if (u_chdir (datadir))
373			fatal ("unable to change to data directory");
374
375			if (u_rename (tmppath, execdir))
376			deltree (tmppath); // if move fails, delete new, assume other process created it independently
377			}
378
379			pack_unmap ();
380			u_close (pack_handle);
381
382	root	1.2	if (u_chdir (execdir))
383			fatal ("unable to change to application instance directory");
384
385	root	1.1	u_setenv ("URLADER_VERSION", URLADER_VERSION);
386			u_setenv ("URLADER_DATADIR", datadir);
387			u_setenv ("URLADER_EXECDIR", execdir);
388			u_setenv ("URLADER_EXE_ID" , exe_id);
389			u_setenv ("URLADER_EXE_DIR", exe_dir);
390			u_setenv ("URLADER_EXE_VER", exe_ver);
391
392			// yes, this is overkill
393			u_setenv ("SHLIB_PATH" , execdir); // hpux
394			u_setenv ("LIBPATH" , execdir); // aix
395			u_setenv ("LD_LIBRARY_PATH" , execdir); // most elf systems
396			u_setenv ("LD_LIBRARY_PATH_32", execdir); // solaris
397			u_setenv ("LD_LIBRARY_PATH_64", execdir); // solaris
398			u_setenv ("LD_LIBRARYN32_PATH", execdir); // irix
399			u_setenv ("LD_LIBRARY64_PATH" , execdir); // irix
400			u_setenv ("DYLD_LIBRARY_PATH" , execdir); // os sucks from apple
401			}
402
403	root	1.2	static void
404			execute (void)
405			{
406			exe_argv [exe_argc] = 0;
407			systemv (exe_argv, 0);
408			}
409
410	root	1.1	#ifdef _WIN32
411
412			int APIENTRY
413			WinMain (HINSTANCE hI, HINSTANCE hP, LPSTR argv, int command_show)
414			{
415			if (!GetModuleFileName (hI, tmppath, sizeof (tmppath)))
416			fatal ("unable to find executable pack");
417
418			if (!(pack_handle = u_open (tmppath)))
419			fatal ("unable to open executable pack");
420
421			exe_info ();
422
423			if (!GetCurrentDirectory (sizeof (currdir), currdir))
424			strcpy (currdir, ".");
425
426			if (SHGetFolderPath (0, CSIDL_APPDATA \| CSIDL_FLAG_CREATE, NULL, SHGFP_TYPE_CURRENT, datadir) != S_OK)
427			fatal ("unable to find application data directory");
428
429			u_mkdir (datadir);
430			u_append (datadir, URLADER);
431
432			load ();
433			execute ();
434
435			return 0;
436			}
437
438			#else
439
440			int
441			main (int argc, char *argv[])
442			{
443			char *home = getenv ("HOME");
444
445			// we assume fd 0 and 2 are "normal"
446
447			if (!(pack_handle = u_open (argv [0])))
448			fatal ("unable to open executable pack");
449
450			exe_info ();
451
452			if (!home)
453			{
454			struct passwd *pw;
455
456			if ((pw = getpwuid (getuid ())))
457			home = pw->pw_dir;
458			else
459			home = "/tmp";
460			}
461
462			if (!getcwd (currdir, sizeof (currdir)))
463			strcpy (currdir, ".");
464
465			u_mkdir (home);
466			sprintf (datadir, "%s/.%s", home, URLADER);
467			u_mkdir (datadir);
468
469			if (gethostname (tmppath, sizeof (tmppath)))
470			strcpy (tmppath, "default");
471
472			u_append (datadir, tmppath);
473
474			load ();
475			execute ();
476
477			return 0;
478			}
479
480			#endif
481