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/* Copyright (C) 2014 Wildfire Games.
*
* 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.
*/
#include "precompiled.h"
#include "lib/sysdep/sysdep.h"
#define GNU_SOURCE
#include "mocks/dlfcn.h"
#include "mocks/unistd.h"
#include <cstdio>
OsPath unix_ExecutablePathname()
{
// Find the executable's filename
Dl_info dl_info;
memset(&dl_info, 0, sizeof(dl_info));
if (!T::dladdr((void *)sys_ExecutablePathname, &dl_info) || !dl_info.dli_fname)
return OsPath();
const char* path = dl_info.dli_fname;
// If this looks like an absolute path, use realpath to get the normalized
// path (with no '.' or '..')
if (path[0] == '/')
{
char resolved[PATH_MAX];
if (!realpath(path, resolved))
return OsPath();
return resolved;
}
// If this looks like a relative path, resolve against cwd and use realpath
if (strchr(path, '/'))
{
char cwd[PATH_MAX];
if (!T::getcwd(cwd, PATH_MAX))
return OsPath();
char absolute[PATH_MAX];
int ret = snprintf(absolute, PATH_MAX, "%s/%s", cwd, path);
if (ret < 0 || ret >= PATH_MAX)
return OsPath(); // path too long, or other error
char resolved[PATH_MAX];
if (!realpath(absolute, resolved))
return OsPath();
return resolved;
}
// If it's not a path at all, i.e. it's just a filename, we'd
// probably have to search through PATH to find it.
// That's complex and should be uncommon, so don't bother.
return OsPath();
}
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