// (‑●‑●)> dual licensed under the WTFPL v2 and MIT licenses // without any warranty. // 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 #endif #ifdef __cplusplus extern "C" { #endif #if defined(__linux__) || defined(__CYGWIN__) #undef _DEFAULT_SOURCE #define _DEFAULT_SOURCE #elif defined(__APPLE__) #undef _DARWIN_C_SOURCE #define _DARWIN_C_SOURCE #define _DARWIN_BETTER_REALPATH #endif #if !defined(WAI_MALLOC) || !defined(WAI_FREE) || !defined(WAI_REALLOC) #include #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) #ifndef WIN32_LEAN_AND_MEAN #define WIN32_LEAN_AND_MEAN #endif #if defined(_MSC_VER) #pragma warning(push, 3) #endif #include #include #if defined(_MSC_VER) #pragma warning(pop) #endif #include 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; bool ok; for (ok = false; !ok; ok = true) { 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__; } if (path != buffer1) WAI_FREE(path); return ok ? length : -1; } WAI_NOINLINE WAI_FUNCSPEC int WAI_PREFIX(getExecutablePath)( char* out, int capacity, int* dirname_length) { return WAI_PREFIX(getModulePath_)(NULL, out, capacity, dirname_length); } 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(

Copyright Gregory Pakosz

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

X]; char* resolved = NULL; FILE* self_exe = NULL; int length = -1; bool ok; for (ok = false; !ok; ok = true) { 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; } } } } } fclose(self_exe); return ok ? length : -1; } 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__) || defined(__OpenBSD__) #include #include #include #include #include #include #include #if defined(__OpenBSD__) #include WAI_FUNCSPEC int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length) { char buffer1[4096]; char buffer2[PATH_MAX]; char buffer3[PATH_MAX]; char** argv = (char**)buffer1; char* resolved = NULL; int length = -1; bool ok; for (ok = false; !ok; ok = true) { int mib[4] = {CTL_KERN, KERN_PROC_ARGS, getpid(), KERN_PROC_ARGV}; size_t size; if (sysctl(mib, 4, NULL, &size, NULL, 0) != 0) break; if (size > sizeof(buffer1)) { argv = (char**)WAI_MALLOC(size); if (!argv) break; } if (sysctl(mib, 4, argv, &size, NULL, 0) != 0) break; if (strchr(argv[0], '/')) { resolved = realpath(argv[0], buffer2); if (!resolved) break; } else { const char* PATH = getenv("PATH"); if (!PATH) break; size_t argv0_length = strlen(argv[0]); const char* begin = PATH; while (1) { const char* separator = strchr(begin, ':'); const char* end = separator ? separator : begin + strlen(begin); if (end - begin > 0) { if (*(end - 1) == '/') --end; if (((end - begin) + 1 + argv0_length + 1) <= sizeof(buffer2)) { memcpy(buffer2, begin, end - begin); buffer2[end - begin] = '/'; memcpy(buffer2 + (end - begin) + 1, argv[0], argv0_length + 1); resolved = realpath(buffer2, buffer3); if (resolved) break; } } if (!separator) break; begin = ++separator; } 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; } } } } } if (argv != (char**)buffer1) WAI_FREE(argv); return ok ? length : -1; } #else 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; bool ok; for (ok = false; !ok; ok = true) { #if defined(__NetBSD__) int mib[4] = {CTL_KERN, KERN_PROC_ARGS, -1, KERN_PROC_PATHNAME}; #else int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1}; #endif size_t size = sizeof(buffer1); if (sysctl(mib, 4, 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; } } } } } return ok ? length : -1; } #endif 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