Skip to content

Commit

Permalink
Update whereami
Browse files Browse the repository at this point in the history
  • Loading branch information
@tobylane
tobylane committed Apr 27, 2022
1 parent b8a0baa commit ce3b418
Showing 1 changed file with 144 additions and 30 deletions.
174 changes: 144 additions & 30 deletions libs/whereami/whereami.c
View file
Expand Up @@ -12,6 +12,15 @@
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
Expand Down Expand Up @@ -59,15 +68,17 @@ extern "C" {
#if defined(_MSC_VER)
#pragma warning(pop)
#endif
#include <stdbool.h>

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 (;;)
for (ok = false; !ok; ok = true)
{
DWORD size;
int length_, length__;
Expand Down Expand Up @@ -123,14 +134,12 @@ static int WAI_PREFIX(getModulePath_)(HMODULE module, char* out, int capacity, i
}

length = length__;

break;
}

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

return length;
return ok ? length : -1;
}

WAI_NOINLINE WAI_FUNCSPEC
Expand Down Expand Up @@ -174,6 +183,7 @@ int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
#define __STDC_FORMAT_MACROS
#endif
#include <inttypes.h>
#include <stdbool.h>

#if !defined(WAI_PROC_SELF_EXE)
#if defined(__sun)
Expand All @@ -189,8 +199,9 @@ int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
char buffer[PATH_MAX];
char* resolved = NULL;
int length = -1;
bool ok;

for (;;)
for (ok = false; !ok; ok = true)
{
resolved = realpath(WAI_PROC_SELF_EXE, buffer);
if (!resolved)
Expand All @@ -215,11 +226,9 @@ int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
}
}
}

break;
}

return length;
return ok ? length : -1;
}

#if !defined(WAI_PROC_SELF_MAPS_RETRY)
Expand All @@ -239,6 +248,7 @@ int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
#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)
Expand Down Expand Up @@ -354,20 +364,17 @@ int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
break;
}

if (maps)
fclose(maps);

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>
#include <stdbool.h>

WAI_FUNCSPEC
int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
Expand All @@ -377,8 +384,9 @@ int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
char* path = buffer1;
char* resolved = NULL;
int length = -1;
bool ok;

for (;;)
for (ok = false; !ok; ok = true)
{
uint32_t size = (uint32_t)sizeof(buffer1);
if (_NSGetExecutablePath(path, &size) == -1)
Expand Down Expand Up @@ -411,14 +419,12 @@ int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
}
}
}

break;
}

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

return length;
return ok ? length : -1;
}

WAI_NOINLINE WAI_FUNCSPEC
Expand Down Expand Up @@ -472,6 +478,7 @@ int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
#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"
Expand All @@ -485,8 +492,9 @@ int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
char* resolved = NULL;
FILE* self_exe = NULL;
int length = -1;
bool ok;

for (;;)
for (ok = false; !ok; ok = true)
{
self_exe = fopen(WAI_PROC_SELF_EXE, "r");
if (!self_exe)
Expand Down Expand Up @@ -518,13 +526,11 @@ int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
}
}
}

break;
}

fclose(self_exe);

return length;
return ok ? length : -1;
}

WAI_FUNCSPEC
Expand Down Expand Up @@ -572,14 +578,124 @@ int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
}

#elif defined(__DragonFly__) || defined(__FreeBSD__) || \
defined(__FreeBSD_kernel__) || defined(__NetBSD__)
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)
Expand All @@ -589,8 +705,9 @@ int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
char* path = buffer1;
char* resolved = NULL;
int length = -1;
bool ok;

for (;;)
for (ok = false; !ok; ok = true)
{
#if defined(__NetBSD__)
int mib[4] = { CTL_KERN, KERN_PROC_ARGS, -1, KERN_PROC_PATHNAME };
Expand All @@ -599,7 +716,7 @@ int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
#endif
size_t size = sizeof(buffer1);

if (sysctl(mib, (u_int)(sizeof(mib) / sizeof(mib[0])), path, &size, NULL, 0) != 0)
if (sysctl(mib, 4, path, &size, NULL, 0) != 0)
break;

resolved = realpath(path, buffer2);
Expand All @@ -625,16 +742,13 @@ int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
}
}
}

break;
}

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

return length;
return ok ? length : -1;
}

#endif

WAI_NOINLINE WAI_FUNCSPEC
int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
{
Expand Down Expand Up @@ -687,4 +801,4 @@ int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)

#ifdef __cplusplus
}
#endif
#endif

0 comments on commit ce3b418

Please sign in to comment.