diff options
Diffstat (limited to 'hereiam')
| -rw-r--r-- | hereiam/here_i_am.adb | 89 | ||||
| -rw-r--r-- | hereiam/here_i_am.ads | 25 | ||||
| -rw-r--r-- | hereiam/whereami.c | 815 | ||||
| -rw-r--r-- | hereiam/whereami.h | 69 |
4 files changed, 998 insertions, 0 deletions
diff --git a/hereiam/here_i_am.adb b/hereiam/here_i_am.adb new file mode 100644 index 0000000..879e07e --- /dev/null +++ b/hereiam/here_i_am.adb @@ -0,0 +1,89 @@ + + +-- Programmed by Jedidiah Barber +-- Released into the public domain + + +with + + Ada.Assertions, + Interfaces.C.Strings, + System.Storage_Elements; + +use type + + Interfaces.C.int; + + +package body Here_I_Am is + + + package Storage renames System.Storage_Elements; + + Null_Pointer : constant Storage.Integer_Address := Storage.To_Integer (System.Null_Address); + + + + + function wai_getExecutablePath + (Buffer : in Interfaces.C.Strings.chars_ptr; + Length : in Interfaces.C.int; + Dir : in Storage.Integer_Address) + return Interfaces.C.int; + pragma Import (C, wai_getExecutablePath, "wai_getExecutablePath"); + pragma Inline (wai_getExecutablePath); + + function wai_getModulePath + (Buffer : in Interfaces.C.Strings.chars_ptr; + Length : in Interfaces.C.int; + Dir : in Storage.Integer_Address) + return Interfaces.C.int; + pragma Import (C, wai_getModulePath, "wai_getModulePath"); + pragma Inline (wai_getModulePath); + + + + + function Executable + return String + is + Path_Length : constant Interfaces.C.int := + wai_getExecutablePath (Interfaces.C.Strings.Null_Ptr, 0, Null_Pointer); + Data_Buffer : aliased Interfaces.C.char_array := + (1 .. Interfaces.C.size_t (Path_Length) => Interfaces.C.nul); + Code : constant Interfaces.C.int := wai_getExecutablePath + (Interfaces.C.Strings.To_Chars_Ptr (Data_Buffer'Unchecked_Access), + Path_Length, + Null_Pointer); + begin + pragma Assert (Code >= 0); + return Interfaces.C.To_Ada (Data_Buffer, False); + exception + when Ada.Assertions.Assertion_Error => raise Where_Is_Error with + "wai_getExecutablePath returned int value of " & Interfaces.C.int'Image (Code); + end Executable; + + + function Module + return String + is + Path_Length : constant Interfaces.C.int := + wai_getModulePath (Interfaces.C.Strings.Null_Ptr, 0, Null_Pointer); + Data_Buffer : aliased Interfaces.C.char_array := + (1 .. Interfaces.C.size_t (Path_Length) => Interfaces.C.nul); + Code : constant Interfaces.C.int := wai_getModulePath + (Interfaces.C.Strings.To_Chars_Ptr (Data_Buffer'Unchecked_Access), + Path_Length, + Null_Pointer); + begin + pragma Assert (Code >= 0); + return Interfaces.C.To_Ada (Data_Buffer, False); + exception + when Ada.Assertions.Assertion_Error => raise Where_Is_Error with + "wai_getModulePath returned int value of " & Interfaces.C.int'Image (Code); + end Module; + + +end Here_I_Am; + + diff --git a/hereiam/here_i_am.ads b/hereiam/here_i_am.ads new file mode 100644 index 0000000..367ac57 --- /dev/null +++ b/hereiam/here_i_am.ads @@ -0,0 +1,25 @@ + + +-- Programmed by Jedidiah Barber +-- Released into the public domain + + +package Here_I_Am is + + + Where_Is_Error : exception; + + + -- Provides the full name and path of the running executable + function Executable + return String; + + + -- Provides the full name and path of the running library + function Module + return String; + + +end Here_I_Am; + + diff --git a/hereiam/whereami.c b/hereiam/whereami.c new file mode 100644 index 0000000..a8a649d --- /dev/null +++ b/hereiam/whereami.c @@ -0,0 +1,815 @@ +// (‑●‑●)> 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 <whereami.h> +#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 <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) + +#ifndef WIN32_LEAN_AND_MEAN +#define WIN32_LEAN_AND_MEAN +#endif +#if defined(_MSC_VER) +#pragma warning(push, 3) +#endif +#include <windows.h> +#include <intrin.h> +#if defined(_MSC_VER) +#pragma warning(pop) +#endif +#if (_MSC_VER >= 1900) +#include <stdbool.h> +#else +#define bool int +#define false 0 +#define true 1 +#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; + 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(__linux__) || defined(__CYGWIN__) || defined(__sun) || defined(WAI_USE_PROC_SELF_EXE) + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#if defined(__linux__) +#include <linux/limits.h> +#else +#include <limits.h> +#endif +#ifndef __STDC_FORMAT_MACROS +#define __STDC_FORMAT_MACROS +#endif +#include <inttypes.h> +#include <stdbool.h> + +#if !defined(WAI_PROC_SELF_EXE) +#if defined(__sun) +#define WAI_PROC_SELF_EXE "/proc/self/path/a.out" +#else +#define WAI_PROC_SELF_EXE "/proc/self/exe" +#endif +#endif + +WAI_FUNCSPEC +int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length) +{ + char buffer[PATH_MAX]; + char* resolved = NULL; + int length = -1; + bool ok; + + for (ok = false; !ok; ok = true) + { + 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; + } + } + } + } + } + + return ok ? length : -1; +} + +#if !defined(WAI_PROC_SELF_MAPS_RETRY) +#define WAI_PROC_SELF_MAPS_RETRY 5 +#endif + +#if !defined(WAI_PROC_SELF_MAPS) +#if defined(__sun) +#define WAI_PROC_SELF_MAPS "/proc/self/map" +#else +#define WAI_PROC_SELF_MAPS "/proc/self/maps" +#endif +#endif + +#if !defined(WAI_STRINGIZE) +#define WAI_STRINGIZE(s) +#define WAI_STRINGIZE_(s) #s +#endif + +#if defined(__ANDROID__) || defined(ANDROID) +#include <fcntl.h> +#include <sys/mman.h> +#include <unistd.h> +#endif +#include <stdbool.h> + +WAI_NOINLINE WAI_FUNCSPEC +int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length) +{ + int length = -1; + FILE* maps = NULL; + + for (int r = 0; r < WAI_PROC_SELF_MAPS_RETRY; ++r) + { + maps = fopen(WAI_PROC_SELF_MAPS, "r"); + if (!maps) + break; + + for (;;) + { + char buffer[128 + PATH_MAX]; + uintptr_t low, high; + char perms[5]; + uint64_t offset; + uint32_t major, minor, inode; + char path[PATH_MAX + 1]; + + if (!fgets(buffer, sizeof(buffer), maps)) + break; + + if (sscanf(buffer, "%" SCNxPTR "-%" SCNxPTR " %s %" SCNx64 " %x:%x %u %" WAI_STRINGIZE(PATH_MAX) "[^\n]\n", &low, &high, perms, &offset, &major, &minor, &inode, path) == 8) + { + void* _addr = WAI_RETURN_ADDRESS(); + uintptr_t addr = (uintptr_t)_addr; + 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); + if (fd == -1) + { + length = -1; // retry + break; + } + + char* begin = (char*)mmap(0, offset, PROT_READ, MAP_SHARED, fd, 0); + if (begin == MAP_FAILED) + { + close(fd); + length = -1; // retry + break; + } + + char* p = begin + offset - 30; // minimum size of local file header + while (p >= begin) // scan backwards + { + if (*((uint32_t*)p) == 0x04034b50UL) // local file header signature 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; + } + + 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); + maps = NULL; + + if (length != -1) + break; + } + + return length; +} + +#elif defined(__APPLE__) + +#include <mach-o/dyld.h> +#include <limits.h> +#include <stdlib.h> +#include <string.h> +#include <dlfcn.h> +#include <stdbool.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; + bool ok; + + for (ok = false; !ok; ok = true) + { + 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; + } + } + } + } + } + + if (path != buffer1) + WAI_FREE(path); + + return ok ? length : -1; +} + +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> +#include <stdbool.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; + 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 <limits.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <sys/sysctl.h> +#include <dlfcn.h> +#include <stdbool.h> + +#if defined(__OpenBSD__) + +#include <unistd.h> + +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 diff --git a/hereiam/whereami.h b/hereiam/whereami.h new file mode 100644 index 0000000..8e58c81 --- /dev/null +++ b/hereiam/whereami.h @@ -0,0 +1,69 @@ +// (‑●‑●)> dual licensed under the WTFPL v2 and MIT licenses +// without any warranty. +// by Gregory Pakosz (@gpakosz) +// https://github.com/gpakosz/whereami + +#ifndef WHEREAMI_H +#define WHEREAMI_H + +#ifdef __cplusplus +extern "C" { +#endif + +#ifndef WAI_FUNCSPEC + #define WAI_FUNCSPEC +#endif +#ifndef WAI_PREFIX +#define WAI_PREFIX(function) wai_##function +#endif + +/** + * Returns the path to the current executable. + * + * Usage: + * - first call `int length = wai_getExecutablePath(NULL, 0, NULL);` to + * retrieve the length of the path + * - allocate the destination buffer with `path = (char*)malloc(length + 1);` + * - call `wai_getExecutablePath(path, length, NULL)` again to retrieve the + * path + * - add a terminal NUL character with `path[length] = '\0';` + * + * @param out destination buffer, optional + * @param capacity destination buffer capacity + * @param dirname_length optional recipient for the length of the dirname part + * of the path. Available only when `capacity` is large enough to retrieve the + * path. + * + * @return the length of the executable path on success (without a terminal NUL + * character), otherwise `-1` + */ +WAI_FUNCSPEC +int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length); + +/** + * Returns the path to the current module + * + * Usage: + * - first call `int length = wai_getModulePath(NULL, 0, NULL);` to retrieve + * the length of the path + * - allocate the destination buffer with `path = (char*)malloc(length + 1);` + * - call `wai_getModulePath(path, length, NULL)` again to retrieve the path + * - add a terminal NUL character with `path[length] = '\0';` + * + * @param out destination buffer, optional + * @param capacity destination buffer capacity + * @param dirname_length optional recipient for the length of the dirname part + * of the path. Available only when `capacity` is large enough to retrieve the + * path. + * + * @return the length of the module path on success (without a terminal NUL + * character), otherwise `-1` + */ +WAI_FUNCSPEC +int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length); + +#ifdef __cplusplus +} +#endif + +#endif // #ifndef WHEREAMI_H |