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Improve normalize_path() util function

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It didn't always properly handle ".." when the preceding path component
was also the first component.
This commit is contained in:
Jon Siwek 2020-01-16 13:07:12 -08:00
parent dbca14e1fc
commit 38cd56a3db
1 changed files with 42 additions and 3 deletions
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41
src/util.cc
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@ -1472,6 +1472,25 @@ TEST_CASE("util normalize_path")
CHECK(normalize_path("/1/./2/3") == "/1/2/3");
CHECK(normalize_path("/1/2/../3") == "/1/3");
CHECK(normalize_path("1/2/3/") == "1/2/3");
CHECK(normalize_path("1/2//3///") == "1/2/3");
CHECK(normalize_path("~/zeek/testing") == "~/zeek/testing");
CHECK(normalize_path("~jon/zeek/testing") == "~jon/zeek/testing");
CHECK(normalize_path("~jon/./zeek/testing") == "~jon/zeek/testing");
CHECK(normalize_path("~/zeek/testing/../././.") == "~/zeek");
CHECK(normalize_path("./zeek") == "./zeek");
CHECK(normalize_path("../zeek") == "../zeek");
CHECK(normalize_path("../zeek/testing/..") == "../zeek");
CHECK(normalize_path("./zeek/..") == ".");
CHECK(normalize_path("./zeek/../..") == "..");
CHECK(normalize_path("./zeek/../../..") == "../..");
CHECK(normalize_path("./..") == "..");
CHECK(normalize_path("../..") == "../..");
CHECK(normalize_path("/..") == "/..");
CHECK(normalize_path("~/..") == "~/..");
CHECK(normalize_path("/../..") == "/../..");
CHECK(normalize_path("~/../..") == "~/../..");
CHECK(normalize_path("zeek/..") == "");
CHECK(normalize_path("zeek/../..") == "..");
}
string normalize_path(const string& path)
@ -1493,12 +1512,32 @@ string normalize_path(const string& path)
if ( *it == "." && it != components.begin() )
final_components.pop_back();
else if ( *it == ".." && final_components[0] != ".." )
else if ( *it == ".." )
{
auto cur_idx = final_components.size() - 1;
if ( cur_idx != 0 )
{
auto last_idx = cur_idx - 1;
auto& last_component = final_components[last_idx];
if ( last_component == "/" || last_component == "~" ||
last_component == ".." )
continue;
if ( last_component == "." )
{
last_component = "..";
final_components.pop_back();
}
else
{
final_components.pop_back();
final_components.pop_back();
}
}
}
}
for ( it = final_components.begin(); it != final_components.end(); ++it )
{