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BUG: Automatic pwd/cwd path translation must check that the generated logical-to-physical mapping is correct by using realpath.

This commit is contained in:
Brad King 2005-08-17 17:04:23 -04:00
parent b0d05cf020
commit 93efb1cf5b
1 changed files with 24 additions and 26 deletions
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50
Source/kwsys/SystemTools.cxx
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@ -3672,37 +3672,35 @@ void SystemTools::ClassInitialize()
char buf[2048];
if(const char* cwd = Getcwd(buf, 2048))
{
// The current working directory may be a logical path. Find
// the shortest logical path that still produces the correct
// physical path.
kwsys_stl::string cwd_changed;
kwsys_stl::string pwd_changed;
// Test progressively shorter logical-to-physical mappings.
kwsys_stl::string pwd_str = pwd;
kwsys_stl::string cwd_str = cwd;
kwsys_stl::string pwd_path;
Realpath(pwd, pwd_path);
if(cwd == pwd_path && strcmp(cwd, pwd) != 0)
while(cwd_str == pwd_path && cwd_str != pwd_str)
{
// The current working directory is a logical path. Split
// both the logical and physical paths into their components.
kwsys_stl::vector<kwsys_stl::string> cwd_components;
kwsys_stl::vector<kwsys_stl::string> pwd_components;
SystemTools::SplitPath(cwd, cwd_components);
SystemTools::SplitPath(pwd, pwd_components);
// The current pair of paths is a working logical mapping.
cwd_changed = cwd_str;
pwd_changed = pwd_str;
// Remove the common ending of the paths to leave only the
// part that changes under the logical mapping.
kwsys_stl::vector<kwsys_stl::string>::iterator ic = cwd_components.end();
kwsys_stl::vector<kwsys_stl::string>::iterator ip = pwd_components.end();
for(;ip != pwd_components.begin() && ic != cwd_components.begin() &&
*(ip-1) == *(ic-1); --ip,--ic);
cwd_components.erase(ic, cwd_components.end());
pwd_components.erase(ip, pwd_components.end());
// Strip off one directory level and see if the logical
// mapping still works.
pwd_str = SystemTools::GetFilenamePath(pwd_str.c_str());
cwd_str = SystemTools::GetFilenamePath(cwd_str.c_str());
Realpath(pwd_str.c_str(), pwd_path);
}
// Reconstruct the string versions of the part of the path
// that changed.
kwsys_stl::string cwd_changed = SystemTools::JoinPath(cwd_components);
kwsys_stl::string pwd_changed = SystemTools::JoinPath(pwd_components);
// Add the translation to keep the logical path name.
if(!cwd_changed.empty() && !pwd_changed.empty())
{
SystemTools::AddTranslationPath(cwd_changed.c_str(),
pwd_changed.c_str());
}
// Add the translation to keep the logical path name.
if(!cwd_changed.empty() && !pwd_changed.empty())
{
SystemTools::AddTranslationPath(cwd_changed.c_str(),
pwd_changed.c_str());
}
}
}