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https://gitea.wildfiregames.com/0ad/0ad
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0999ba0941
- simplify sys_get_executable_name interface - return OsPath directly, rename to sys_ExecutablePathname - add validation of path components in GetDirectoryEntries - replace multiple calls to GetModuleFileNameW with sys_ExecutablePathname - lift nearly all MAX_PATH limitations (required at work) This was SVN commit r9109.
73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
/* Copyright (c) 2010 Wildfire Games
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "precompiled.h"
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#include "lib/sysdep/sysdep.h"
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#define GNU_SOURCE
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#include "mocks/dlfcn.h"
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#include "mocks/unistd.h"
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#include <cstdio>
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OsPath sys_ExecutablePathname()
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{
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// Find the executable's filename
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Dl_info dl_info;
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memset(&dl_info, 0, sizeof(dl_info));
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if (!T::dladdr((void *)sys_ExecutablePathname, &dl_info) || !dl_info.dli_fname)
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return OsPath();
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const char* path = dl_info.dli_fname;
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// If this looks like an absolute path, use realpath to get the normalized
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// path (with no '.' or '..')
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if (path[0] == '/')
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{
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char resolved[PATH_MAX];
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if (!realpath(path, resolved))
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return OsPath();
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return resolved;
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}
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// If this looks like a relative path, resolve against cwd and use realpath
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if (strchr(path, '/'))
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{
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char cwd[PATH_MAX];
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if (!T::getcwd(cwd, PATH_MAX))
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return OsPath();
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char absolute[PATH_MAX];
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int ret = snprintf(absolute, PATH_MAX, "%s/%s", cwd, path);
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if (ret < 0 || ret >= PATH_MAX)
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return OsPath(); // path too long, or other error
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char resolved[PATH_MAX];
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if (!realpath(absolute, resolved))
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return OsPath();
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return resolved;
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}
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// If it's not a path at all, i.e. it's just a filename, we'd
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// probably have to search through PATH to find it.
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// That's complex and should be uncommon, so don't bother.
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return OsPath();
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}
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