[proxmark3-svn] / client / whereami.c

// (‑●‑●)> released under the WTFPL v2 license, by Gregory Pakosz (@gpakosz)
// https://github.com/gpakosz/whereami

// in case you want to #include "whereami.c" in a larger compilation unit
#if !defined(WHEREAMI_H)
#include <whereami.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

#if defined(__linux__)
// make realpath() available:
#define _DEFAULT_SOURCE
#endif

#if !defined(WAI_MALLOC) || !defined(WAI_FREE) || !defined(WAI_REALLOC)
#include <stdlib.h>
#endif

#if !defined(WAI_MALLOC)
#define WAI_MALLOC(size) malloc(size)
#endif

#if !defined(WAI_FREE)
#define WAI_FREE(p) free(p)
#endif

#if !defined(WAI_REALLOC)
#define WAI_REALLOC(p, size) realloc(p, size)
#endif

#ifndef WAI_NOINLINE
#if defined(_MSC_VER)
#define WAI_NOINLINE __declspec(noinline)
#elif defined(__GNUC__)
#define WAI_NOINLINE __attribute__((noinline))
#else
#error unsupported compiler
#endif
#endif

#if defined(_MSC_VER)
#define WAI_RETURN_ADDRESS() _ReturnAddress()
#elif defined(__GNUC__)
#define WAI_RETURN_ADDRESS() __builtin_extract_return_addr(__builtin_return_address(0))
#else
#error unsupported compiler
#endif

#if defined(_WIN32)

#define WIN32_LEAN_AND_MEAN
#if defined(_MSC_VER)
#pragma warning(push, 3)
#endif
#include <windows.h>
//#include <intrin.h>			// not required and doesn't exist in old mingw environments
#if defined(_MSC_VER)
#pragma warning(pop)
#endif

static int WAI_PREFIX(getModulePath_)(HMODULE module, char* out, int capacity, int* dirname_length)
{
  wchar_t buffer1[MAX_PATH];
  wchar_t buffer2[MAX_PATH];
  wchar_t* path = NULL;
  int length = -1;

  for (;;)
  {
    DWORD size;
    int length_, length__;

    size = GetModuleFileNameW(module, buffer1, sizeof(buffer1) / sizeof(buffer1[0]));

    if (size == 0)
      break;
    else if (size == (DWORD)(sizeof(buffer1) / sizeof(buffer1[0])))
    {
      DWORD size_ = size;
      do
      {
        wchar_t* path_;

        path_ = (wchar_t*)WAI_REALLOC(path, sizeof(wchar_t) * size_ * 2);
        if (!path_)
          break;
        size_ *= 2;
        path = path_;
        size = GetModuleFileNameW(module, path, size_);
      }
      while (size == size_);

      if (size == size_)
        break;
    }
    else
      path = buffer1;

    if (!_wfullpath(buffer2, path, MAX_PATH))
      break;
    length_ = (int)wcslen(buffer2);
    length__ = WideCharToMultiByte(CP_UTF8, 0, buffer2, length_ , out, capacity, NULL, NULL);

    if (length__ == 0)
      length__ = WideCharToMultiByte(CP_UTF8, 0, buffer2, length_, NULL, 0, NULL, NULL);
    if (length__ == 0)
      break;

    if (length__ <= capacity && dirname_length)
    {
      int i;

      for (i = length__ - 1; i >= 0; --i)
      {
        if (out[i] == '\\')
        {
          *dirname_length = i;
          break;
        }
      }
    }

    length = length__;

    break;
  }

  if (path != buffer1)
    WAI_FREE(path);

  return length;
}

WAI_NOINLINE
WAI_FUNCSPEC
int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
{
  return WAI_PREFIX(getModulePath_)(NULL, out, capacity, dirname_length);
}

// GetModuleHandleEx() is not available on old mingw environments. We don't need getModulePath() yet. 
// Sacrifice it for the time being to improve backwards compatibility
/* WAI_NOINLINE
WAI_FUNCSPEC
int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
{
  HMODULE module;
  int length = -1;

#if defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable: 4054)
#endif
  if (GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, (LPCTSTR)WAI_RETURN_ADDRESS(), &module))
#if defined(_MSC_VER)
#pragma warning(pop)
#endif
  {
    length = WAI_PREFIX(getModulePath_)(module, out, capacity, dirname_length);
  }

  return length;
}
 */

#elif defined(__linux__)

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// #include <limits.h>     // not all linux distributions define PATH_MAX in limits.h because it depends on the filesystem. Therefore use...
#include <linux/limits.h>
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
#include <inttypes.h>

#if !defined(WAI_PROC_SELF_EXE)
#define WAI_PROC_SELF_EXE "/proc/self/exe"
#endif

WAI_FUNCSPEC
int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
{
  char buffer[PATH_MAX];
  char* resolved = NULL;
  int length = -1;

  for (;;)
  {
    resolved = realpath(WAI_PROC_SELF_EXE, buffer);
    if (!resolved)
      break;

    length = (int)strlen(resolved);
    if (length <= capacity)
    {
      memcpy(out, resolved, length);

      if (dirname_length)
      {
        int i;

        for (i = length - 1; i >= 0; --i)
        {
          if (out[i] == '/')
          {
            *dirname_length = i;
            break;
          }
        }
      }
    }

    break;
  }

  return length;
}

#if !defined(WAI_PROC_SELF_MAPS_RETRY)
#define WAI_PROC_SELF_MAPS_RETRY 5
#endif

#if !defined(WAI_PROC_SELF_MAPS)
#define WAI_PROC_SELF_MAPS "/proc/self/maps"
#endif

#if defined(__ANDROID__) || defined(ANDROID)
#include <fcntl.h>
#include <sys/mman.h>
#endif

WAI_NOINLINE
WAI_FUNCSPEC
int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
{
  int length = -1;
  FILE* maps = NULL;
  int i;

  for (i = 0; i < WAI_PROC_SELF_MAPS_RETRY; ++i)
  {
    maps = fopen(WAI_PROC_SELF_MAPS, "r");
    if (!maps)
      break;

    for (;;)
    {
      char buffer[PATH_MAX < 1024 ? 1024 : PATH_MAX];
      uint64_t low, high;
      char perms[5];
      uint64_t offset;
      uint32_t major, minor;
      char path[PATH_MAX];
      uint32_t inode;

      if (!fgets(buffer, sizeof(buffer), maps))
        break;

      if (sscanf(buffer, "%" SCNx64 "-%" SCNx64 " %s %" SCNx64 " %x:%x %u %s\n", &low, &high, perms, &offset, &major, &minor, &inode, path) == 8)
      {
        uint64_t addr = (uint64_t)(uintptr_t)WAI_RETURN_ADDRESS();
        if (low <= addr && addr <= high)
        {
          char* resolved;

          resolved = realpath(path, buffer);
          if (!resolved)
            break;

          length = (int)strlen(resolved);
#if defined(__ANDROID__) || defined(ANDROID)
          if (length > 4
              &&buffer[length - 1] == 'k'
              &&buffer[length - 2] == 'p'
              &&buffer[length - 3] == 'a'
              &&buffer[length - 4] == '.')
          {
            int fd = open(path, O_RDONLY);
            char* begin;
            char* p;

            begin = (char*)mmap(0, offset, PROT_READ, MAP_SHARED, fd, 0);
            p = begin + offset;

            while (p >= begin) // scan backwards
            {
              if (*((uint32_t*)p) == 0x04034b50UL) // local file header found
              {
                uint16_t length_ = *((uint16_t*)(p + 26));

                if (length + 2 + length_ < (int)sizeof(buffer))
                {
                  memcpy(&buffer[length], "!/", 2);
                  memcpy(&buffer[length + 2], p + 30, length_);
                  length += 2 + length_;
                }

                break;
              }

              p -= 4;
            }

            munmap(begin, offset);
            close(fd);
          }
#endif
          if (length <= capacity)
          {
            memcpy(out, resolved, length);

            if (dirname_length)
            {
              int i;

              for (i = length - 1; i >= 0; --i)
              {
                if (out[i] == '/')
                {
                  *dirname_length = i;
                  break;
                }
              }
            }
          }

          break;
        }
      }
    }

    fclose(maps);

    if (length != -1)
      break;
  }

  return length;
}

#elif defined(__APPLE__)

#define _DARWIN_BETTER_REALPATH
#include <mach-o/dyld.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>

WAI_FUNCSPEC
int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
{
  char buffer1[PATH_MAX];
  char buffer2[PATH_MAX];
  char* path = buffer1;
  char* resolved = NULL;
  int length = -1;

  for (;;)
  {
    uint32_t size = (uint32_t)sizeof(buffer1);
    if (_NSGetExecutablePath(path, &size) == -1)
    {
      path = (char*)WAI_MALLOC(size);
      if (!_NSGetExecutablePath(path, &size))
        break;
    }

    resolved = realpath(path, buffer2);
    if (!resolved)
      break;

    length = (int)strlen(resolved);
    if (length <= capacity)
    {
      memcpy(out, resolved, length);

      if (dirname_length)
      {
        int i;

        for (i = length - 1; i >= 0; --i)
        {
          if (out[i] == '/')
          {
            *dirname_length = i;
            break;
          }
        }
      }
    }

    break;
  }

  if (path != buffer1)
    WAI_FREE(path);

  return length;
}

WAI_NOINLINE
WAI_FUNCSPEC
int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
{
  char buffer[PATH_MAX];
  char* resolved = NULL;
  int length = -1;

  for(;;)
  {
    Dl_info info;

    if (dladdr(WAI_RETURN_ADDRESS(), &info))
    {
      resolved = realpath(info.dli_fname, buffer);
      if (!resolved)
        break;

      length = (int)strlen(resolved);
      if (length <= capacity)
      {
        memcpy(out, resolved, length);

        if (dirname_length)
        {
          int i;

          for (i = length - 1; i >= 0; --i)
          {
            if (out[i] == '/')
            {
              *dirname_length = i;
              break;
            }
          }
        }
      }
    }

    break;
  }

  return length;
}

#elif defined(__QNXNTO__)

#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>

#if !defined(WAI_PROC_SELF_EXE)
#define WAI_PROC_SELF_EXE "/proc/self/exefile"
#endif

WAI_FUNCSPEC
int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
{
  char buffer1[PATH_MAX];
  char buffer2[PATH_MAX];
  char* resolved = NULL;
  FILE* self_exe = NULL;
  int length = -1;

  for (;;)
  {
    self_exe = fopen(WAI_PROC_SELF_EXE, "r");
    if (!self_exe)
      break;

    if (!fgets(buffer1, sizeof(buffer1), self_exe))
      break;

    resolved = realpath(buffer1, buffer2);
    if (!resolved)
      break;

    length = (int)strlen(resolved);
    if (length <= capacity)
    {
      memcpy(out, resolved, length);

      if (dirname_length)
      {
        int i;

        for (i = length - 1; i >= 0; --i)
        {
          if (out[i] == '/')
          {
            *dirname_length = i;
            break;
          }
        }
      }
    }

    break;
  }

  fclose(self_exe);

  return length;
}

WAI_FUNCSPEC
int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
{
  char buffer[PATH_MAX];
  char* resolved = NULL;
  int length = -1;

  for(;;)
  {
    Dl_info info;

    if (dladdr(WAI_RETURN_ADDRESS(), &info))
    {
      resolved = realpath(info.dli_fname, buffer);
      if (!resolved)
        break;

      length = (int)strlen(resolved);
      if (length <= capacity)
      {
        memcpy(out, resolved, length);

        if (dirname_length)
        {
          int i;

          for (i = length - 1; i >= 0; --i)
          {
            if (out[i] == '/')
            {
              *dirname_length = i;
              break;
            }
          }
        }
      }
    }

    break;
  }

  return length;
}

#elif defined(__DragonFly__) || defined(__FreeBSD__) || \
      defined(__FreeBSD_kernel__) || defined(__NetBSD__)

#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <dlfcn.h>

WAI_FUNCSPEC
int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
{
  char buffer1[PATH_MAX];
  char buffer2[PATH_MAX];
  char* path = buffer1;
  char* resolved = NULL;
  int length = -1;

  for (;;)
  {
    int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
    size_t size = sizeof(buffer1);

    if (sysctl(mib, (u_int)(sizeof(mib) / sizeof(mib[0])), path, &size, NULL, 0) != 0)
        break;

    resolved = realpath(path, buffer2);
    if (!resolved)
      break;

    length = (int)strlen(resolved);
    if (length <= capacity)
    {
      memcpy(out, resolved, length);

      if (dirname_length)
      {
        int i;

        for (i = length - 1; i >= 0; --i)
        {
          if (out[i] == '/')
          {
            *dirname_length = i;
            break;
          }
        }
      }
    }

    break;
  }

  if (path != buffer1)
    WAI_FREE(path);

  return length;
}

WAI_NOINLINE
WAI_FUNCSPEC
int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
{
  char buffer[PATH_MAX];
  char* resolved = NULL;
  int length = -1;

  for(;;)
  {
    Dl_info info;

    if (dladdr(WAI_RETURN_ADDRESS(), &info))
    {
      resolved = realpath(info.dli_fname, buffer);
      if (!resolved)
        break;

      length = (int)strlen(resolved);
      if (length <= capacity)
      {
        memcpy(out, resolved, length);

        if (dirname_length)
        {
          int i;

          for (i = length - 1; i >= 0; --i)
          {
            if (out[i] == '/')
            {
              *dirname_length = i;
              break;
            }
          }
        }
      }
    }

    break;
  }

  return length;
}

#else

#error unsupported platform

#endif

#ifdef __cplusplus
}
#endif
Commit	Line	Data
4197a3f6	1	// (‑●‑●)> released under the WTFPL v2 license, by Gregory Pakosz (@gpakosz)
	2	// https://github.com/gpakosz/whereami
	3
	4	// in case you want to #include "whereami.c" in a larger compilation unit
	5	#if !defined(WHEREAMI_H)
	6	#include <whereami.h>
	7	#endif
	8
	9	#ifdef __cplusplus
	10	extern "C" {
	11	#endif
	12
a9d08ed0	13	#if defined(__linux__)
	14	// make realpath() available:
	15	#define _DEFAULT_SOURCE
	16	#endif
	17
4197a3f6	18	#if !defined(WAI_MALLOC) \|\| !defined(WAI_FREE) \|\| !defined(WAI_REALLOC)
	19	#include <stdlib.h>
	20	#endif
	21
	22	#if !defined(WAI_MALLOC)
	23	#define WAI_MALLOC(size) malloc(size)
	24	#endif
	25
	26	#if !defined(WAI_FREE)
	27	#define WAI_FREE(p) free(p)
	28	#endif
	29
	30	#if !defined(WAI_REALLOC)
	31	#define WAI_REALLOC(p, size) realloc(p, size)
	32	#endif
	33
	34	#ifndef WAI_NOINLINE
	35	#if defined(_MSC_VER)
	36	#define WAI_NOINLINE __declspec(noinline)
	37	#elif defined(__GNUC__)
	38	#define WAI_NOINLINE __attribute__((noinline))
	39	#else
	40	#error unsupported compiler
	41	#endif
	42	#endif
	43
	44	#if defined(_MSC_VER)
	45	#define WAI_RETURN_ADDRESS() _ReturnAddress()
	46	#elif defined(__GNUC__)
	47	#define WAI_RETURN_ADDRESS() __builtin_extract_return_addr(__builtin_return_address(0))
	48	#else
	49	#error unsupported compiler
	50	#endif
	51
	52	#if defined(_WIN32)
	53
	54	#define WIN32_LEAN_AND_MEAN
	55	#if defined(_MSC_VER)
	56	#pragma warning(push, 3)
	57	#endif
	58	#include <windows.h>
5a6a7aff	59	//#include <intrin.h> // not required and doesn't exist in old mingw environments
4197a3f6	60	#if defined(_MSC_VER)
	61	#pragma warning(pop)
	62	#endif
	63
	64	static int WAI_PREFIX(getModulePath_)(HMODULE module, char* out, int capacity, int* dirname_length)
	65	{
	66	wchar_t buffer1[MAX_PATH];
	67	wchar_t buffer2[MAX_PATH];
	68	wchar_t* path = NULL;
	69	int length = -1;
	70
	71	for (;;)
	72	{
	73	DWORD size;
	74	int length_, length__;
	75
	76	size = GetModuleFileNameW(module, buffer1, sizeof(buffer1) / sizeof(buffer1[0]));
	77
	78	if (size == 0)
	79	break;
	80	else if (size == (DWORD)(sizeof(buffer1) / sizeof(buffer1[0])))
	81	{
	82	DWORD size_ = size;
	83	do
	84	{
	85	wchar_t* path_;
	86
	87	path_ = (wchar_t)WAI_REALLOC(path, sizeof(wchar_t) size_ * 2);
	88	if (!path_)
	89	break;
	90	size_ *= 2;
	91	path = path_;
	92	size = GetModuleFileNameW(module, path, size_);
	93	}
	94	while (size == size_);
	95
	96	if (size == size_)
	97	break;
	98	}
	99	else
	100	path = buffer1;
	101
	102	if (!_wfullpath(buffer2, path, MAX_PATH))
	103	break;
	104	length_ = (int)wcslen(buffer2);
	105	length__ = WideCharToMultiByte(CP_UTF8, 0, buffer2, length_ , out, capacity, NULL, NULL);
	106
	107	if (length__ == 0)
	108	length__ = WideCharToMultiByte(CP_UTF8, 0, buffer2, length_, NULL, 0, NULL, NULL);
	109	if (length__ == 0)
	110	break;
	111
	112	if (length__ <= capacity && dirname_length)
	113	{
	114	int i;
	115
	116	for (i = length__ - 1; i >= 0; --i)
	117	{
	118	if (out[i] == '\\')
	119	{
	120	*dirname_length = i;
	121	break;
	122	}
	123	}
124	}
125
126	length = length__;
127
128	break;
129	}
130
131	if (path != buffer1)
132	WAI_FREE(path);
133
134	return length;
135	}
136
137	WAI_NOINLINE
138	WAI_FUNCSPEC
139	int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
140	{
141	return WAI_PREFIX(getModulePath_)(NULL, out, capacity, dirname_length);
142	}
143
5a6a7aff	144	// GetModuleHandleEx() is not available on old mingw environments. We don't need getModulePath() yet.
	145	// Sacrifice it for the time being to improve backwards compatibility
	146	/* WAI_NOINLINE
4197a3f6	147	WAI_FUNCSPEC
	148	int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
	149	{
	150	HMODULE module;
	151	int length = -1;
	152
	153	#if defined(_MSC_VER)
	154	#pragma warning(push)
	155	#pragma warning(disable: 4054)
	156	#endif
	157	if (GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS \| GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, (LPCTSTR)WAI_RETURN_ADDRESS(), &module))
	158	#if defined(_MSC_VER)
	159	#pragma warning(pop)
	160	#endif
	161	{
	162	length = WAI_PREFIX(getModulePath_)(module, out, capacity, dirname_length);
	163	}
	164
	165	return length;
	166	}
5a6a7aff	167	*/
4197a3f6	168
	169	#elif defined(__linux__)
	170
	171	#include <stdio.h>
	172	#include <stdlib.h>
	173	#include <string.h>
5a6a7aff	174	// #include <limits.h> // not all linux distributions define PATH_MAX in limits.h because it depends on the filesystem. Therefore use...
5a6a7aff	175	#include <linux/limits.h>
4197a3f6	176	#ifndef __STDC_FORMAT_MACROS
	177	#define __STDC_FORMAT_MACROS
	178	#endif
	179	#include <inttypes.h>
	180
	181	#if !defined(WAI_PROC_SELF_EXE)
	182	#define WAI_PROC_SELF_EXE "/proc/self/exe"
	183	#endif
	184
	185	WAI_FUNCSPEC
	186	int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
	187	{
	188	char buffer[PATH_MAX];
	189	char* resolved = NULL;
	190	int length = -1;
	191
	192	for (;;)
	193	{
	194	resolved = realpath(WAI_PROC_SELF_EXE, buffer);
	195	if (!resolved)
	196	break;
	197
	198	length = (int)strlen(resolved);
	199	if (length <= capacity)
	200	{
	201	memcpy(out, resolved, length);
	202
	203	if (dirname_length)
	204	{
	205	int i;
	206
	207	for (i = length - 1; i >= 0; --i)
	208	{
	209	if (out[i] == '/')
	210	{
	211	*dirname_length = i;
	212	break;
	213	}
	214	}
	215	}
	216	}
	217
	218	break;
	219	}
	220
	221	return length;
	222	}
	223
	224	#if !defined(WAI_PROC_SELF_MAPS_RETRY)
	225	#define WAI_PROC_SELF_MAPS_RETRY 5
	226	#endif
	227
	228	#if !defined(WAI_PROC_SELF_MAPS)
	229	#define WAI_PROC_SELF_MAPS "/proc/self/maps"
	230	#endif
	231
	232	#if defined(__ANDROID__) \|\| defined(ANDROID)
	233	#include <fcntl.h>
	234	#include <sys/mman.h>
	235	#endif
	236
	237	WAI_NOINLINE
	238	WAI_FUNCSPEC
	239	int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
240	{
241	int length = -1;
242	FILE* maps = NULL;
243	int i;
244
245	for (i = 0; i < WAI_PROC_SELF_MAPS_RETRY; ++i)
246	{
247	maps = fopen(WAI_PROC_SELF_MAPS, "r");
248	if (!maps)
249	break;
250
251	for (;;)
252	{
253	char buffer[PATH_MAX < 1024 ? 1024 : PATH_MAX];
254	uint64_t low, high;
255	char perms[5];
256	uint64_t offset;
257	uint32_t major, minor;
258	char path[PATH_MAX];
259	uint32_t inode;
260
261	if (!fgets(buffer, sizeof(buffer), maps))
262	break;
263
7cb8516c	264	if (sscanf(buffer, "%" SCNx64 "-%" SCNx64 " %s %" SCNx64 " %x:%x %u %s\n", &low, &high, perms, &offset, &major, &minor, &inode, path) == 8)
4197a3f6	265	{
	266	uint64_t addr = (uint64_t)(uintptr_t)WAI_RETURN_ADDRESS();
	267	if (low <= addr && addr <= high)
	268	{
	269	char* resolved;
	270
	271	resolved = realpath(path, buffer);
	272	if (!resolved)
	273	break;
	274
	275	length = (int)strlen(resolved);
	276	#if defined(__ANDROID__) \|\| defined(ANDROID)
	277	if (length > 4
	278	&&buffer[length - 1] == 'k'
	279	&&buffer[length - 2] == 'p'
	280	&&buffer[length - 3] == 'a'
	281	&&buffer[length - 4] == '.')
	282	{
	283	int fd = open(path, O_RDONLY);
	284	char* begin;
	285	char* p;
	286
	287	begin = (char*)mmap(0, offset, PROT_READ, MAP_SHARED, fd, 0);
	288	p = begin + offset;
	289
	290	while (p >= begin) // scan backwards
	291	{
	292	if (((uint32_t)p) == 0x04034b50UL) // local file header found
	293	{
	294	uint16_t length_ = ((uint16_t)(p + 26));
	295
	296	if (length + 2 + length_ < (int)sizeof(buffer))
	297	{
	298	memcpy(&buffer[length], "!/", 2);
	299	memcpy(&buffer[length + 2], p + 30, length_);
	300	length += 2 + length_;
	301	}
	302
	303	break;
	304	}
	305
	306	p -= 4;
	307	}
	308
	309	munmap(begin, offset);
	310	close(fd);
	311	}
	312	#endif
	313	if (length <= capacity)
	314	{
	315	memcpy(out, resolved, length);
	316
	317	if (dirname_length)
	318	{
	319	int i;
	320
	321	for (i = length - 1; i >= 0; --i)
	322	{
	323	if (out[i] == '/')
	324	{
	325	*dirname_length = i;
	326	break;
	327	}
	328	}
329	}
330	}
331
332	break;
333	}
334	}
335	}
336
337	fclose(maps);
338
339	if (length != -1)
340	break;
341	}
342
343	return length;
344	}
345
346	#elif defined(__APPLE__)
347
348	#define _DARWIN_BETTER_REALPATH
349	#include <mach-o/dyld.h>
350	#include <limits.h>
351	#include <stdlib.h>
352	#include <string.h>
353	#include <dlfcn.h>
354
355	WAI_FUNCSPEC
356	int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
357	{
358	char buffer1[PATH_MAX];
359	char buffer2[PATH_MAX];
360	char* path = buffer1;
361	char* resolved = NULL;
362	int length = -1;
363
364	for (;;)
365	{
366	uint32_t size = (uint32_t)sizeof(buffer1);
367	if (_NSGetExecutablePath(path, &size) == -1)
368	{
369	path = (char*)WAI_MALLOC(size);
370	if (!_NSGetExecutablePath(path, &size))
371	break;
372	}
373
374	resolved = realpath(path, buffer2);
375	if (!resolved)
376	break;
377
378	length = (int)strlen(resolved);
379	if (length <= capacity)
380	{
381	memcpy(out, resolved, length);
382
383	if (dirname_length)
384	{
385	int i;
386
387	for (i = length - 1; i >= 0; --i)
388	{
389	if (out[i] == '/')
390	{
391	*dirname_length = i;
392	break;
393	}
394	}
395	}
396	}
397
398	break;
399	}
400
401	if (path != buffer1)
402	WAI_FREE(path);
403
404	return length;
405	}
406
407	WAI_NOINLINE
408	WAI_FUNCSPEC
409	int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
410	{
411	char buffer[PATH_MAX];
412	char* resolved = NULL;
413	int length = -1;
414
415	for(;;)
416	{
417	Dl_info info;
418
419	if (dladdr(WAI_RETURN_ADDRESS(), &info))
420	{
421	resolved = realpath(info.dli_fname, buffer);
422	if (!resolved)
423	break;
424
425	length = (int)strlen(resolved);
426	if (length <= capacity)
427	{
428	memcpy(out, resolved, length);
429
430	if (dirname_length)
431	{
432	int i;
433
434	for (i = length - 1; i >= 0; --i)
435	{
436	if (out[i] == '/')
437	{
438	*dirname_length = i;
439	break;
440	}
441	}
442	}
443	}
444	}
445
446	break;
447	}
448
449	return length;
450	}
451
452	#elif defined(__QNXNTO__)
453
454	#include <limits.h>
455	#include <stdio.h>
456	#include <stdlib.h>
457	#include <string.h>
458	#include <dlfcn.h>
459
460	#if !defined(WAI_PROC_SELF_EXE)
461	#define WAI_PROC_SELF_EXE "/proc/self/exefile"
462	#endif
463
464	WAI_FUNCSPEC
465	int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
466	{
467	char buffer1[PATH_MAX];
468	char buffer2[PATH_MAX];
469	char* resolved = NULL;
470	FILE* self_exe = NULL;
471	int length = -1;
472
473	for (;;)
474	{
475	self_exe = fopen(WAI_PROC_SELF_EXE, "r");
476	if (!self_exe)
477	break;
478
479	if (!fgets(buffer1, sizeof(buffer1), self_exe))
480	break;
481
482	resolved = realpath(buffer1, buffer2);
483	if (!resolved)
484	break;
485
486	length = (int)strlen(resolved);
487	if (length <= capacity)
488	{
489	memcpy(out, resolved, length);
490
491	if (dirname_length)
492	{
493	int i;
494
495	for (i = length - 1; i >= 0; --i)
496	{
497	if (out[i] == '/')
498	{
499	*dirname_length = i;
500	break;
501	}
502	}
503	}
504	}
505
506	break;
507	}
508
509	fclose(self_exe);
510
511	return length;
512	}
513
514	WAI_FUNCSPEC
515	int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
516	{
517	char buffer[PATH_MAX];
518	char* resolved = NULL;
519	int length = -1;
520
521	for(;;)
522	{
523	Dl_info info;
524
525	if (dladdr(WAI_RETURN_ADDRESS(), &info))
526	{
527	resolved = realpath(info.dli_fname, buffer);
528	if (!resolved)
529	break;
530
531	length = (int)strlen(resolved);
532	if (length <= capacity)
533	{
534	memcpy(out, resolved, length);
535
536	if (dirname_length)
537	{
538	int i;
539
540	for (i = length - 1; i >= 0; --i)
541	{
542	if (out[i] == '/')
543	{
544	*dirname_length = i;
545	break;
546	}
547	}
548	}
549	}
550	}
551
552	break;
553	}
554
555	return length;
556	}
557
558	#elif defined(__DragonFly__) \|\| defined(__FreeBSD__) \|\| \
559	defined(__FreeBSD_kernel__) \|\| defined(__NetBSD__)
560
561	#include <limits.h>
562	#include <stdlib.h>
563	#include <string.h>
564	#include <sys/types.h>
565	#include <sys/sysctl.h>
566	#include <dlfcn.h>
567
568	WAI_FUNCSPEC
569	int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
570	{
571	char buffer1[PATH_MAX];
572	char buffer2[PATH_MAX];
573	char* path = buffer1;
574	char* resolved = NULL;
575	int length = -1;
576
577	for (;;)
578	{
579	int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
580	size_t size = sizeof(buffer1);
581
582	if (sysctl(mib, (u_int)(sizeof(mib) / sizeof(mib[0])), path, &size, NULL, 0) != 0)
583	break;
584
585	resolved = realpath(path, buffer2);
586	if (!resolved)
587	break;
588
589	length = (int)strlen(resolved);
590	if (length <= capacity)
591	{
592	memcpy(out, resolved, length);
593
594	if (dirname_length)
595	{
596	int i;
597
598	for (i = length - 1; i >= 0; --i)
599	{
600	if (out[i] == '/')
601	{
602	*dirname_length = i;
603	break;
604	}
605	}
606	}
607	}
608
609	break;
610	}
611
612	if (path != buffer1)
613	WAI_FREE(path);
614
615	return length;
616	}
617
618	WAI_NOINLINE
619	WAI_FUNCSPEC
620	int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
621	{
622	char buffer[PATH_MAX];
623	char* resolved = NULL;
624	int length = -1;
625
626	for(;;)
627	{
628	Dl_info info;
629
630	if (dladdr(WAI_RETURN_ADDRESS(), &info))
631	{
632	resolved = realpath(info.dli_fname, buffer);
633	if (!resolved)
634	break;
635
636	length = (int)strlen(resolved);
637	if (length <= capacity)
638	{
639	memcpy(out, resolved, length);
640
641	if (dirname_length)
642	{
643	int i;
644
645	for (i = length - 1; i >= 0; --i)
646	{
647	if (out[i] == '/')
648	{
649	*dirname_length = i;
650	break;
651	}
652	}
653	}
654	}
655	}
656
657	break;
658	}
659
660	return length;
661	}
662
663	#else
664
665	#error unsupported platform
666
667	#endif
668
669	#ifdef __cplusplus
670	}
671	#endif