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implement _wfullpath

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This commit is contained in:
rjkiv 2025-09-02 17:49:50 -07:00
parent 6b4f27a888
commit 9a98c29a59
1 changed files with 49 additions and 2 deletions
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51
dll/msvcrt.cpp
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@ -5,6 +5,7 @@
#include <cwchar>
#include <cwctype>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string>
@ -185,8 +186,8 @@ namespace msvcrt {
for(uint16_t** env = __winitenv; env && *env; ++env){
uint16_t* cur = *env;
std::string cur_str = wideStringToString(cur);
DEBUG_LOG("\tCur env var: %s\n", cur_str.c_str());
// std::string cur_str = wideStringToString(cur);
// DEBUG_LOG("\tCur env var: %s\n", cur_str.c_str());
if(wstrncmp(cur, varname, varnamelen) == 0 && cur[varnamelen] == L'='){
uint16_t* value = cur + varnamelen + 1;
size_t value_len = wstrlen(value);
@ -509,6 +510,51 @@ namespace msvcrt {
return unlink(str.c_str());
}
uint16_t* WIN_ENTRY _wfullpath(uint16_t* absPath, const uint16_t* relPath, size_t maxLength){
std::string relPathStr = wideStringToString(relPath);
DEBUG_LOG("_wfullpath, relpath %s\n", relPathStr.c_str());
if(!relPath) return nullptr;
char resolved[PATH_MAX];
char* realpathResult = realpath(relPathStr.c_str(), resolved);
std::string finalPath;
if(realpathResult){
finalPath = resolved;
}
else {
DEBUG_LOG("\tcould not find realpath, trying cwd...\n");
char cwd[PATH_MAX];
if(!getcwd(cwd, sizeof(cwd))){
return nullptr;
}
finalPath = std::string(cwd) + "/" + relPathStr;
}
std::vector<uint16_t> wResolved = stringToWideString(finalPath.c_str());
// If caller provided a buffer, check size
if (absPath) {
if (wResolved.size() + 1 > maxLength) {
return nullptr; // too small
}
std::copy(wResolved.begin(), wResolved.end(), absPath);
absPath[wResolved.size()] = 0;
std::string absPathStr = wideStringToString(absPath);
DEBUG_LOG("\t-> abspath %s\n", absPathStr.c_str());
return absPath;
} else {
// Windows behavior: if absPath == NULL, allocate new
uint16_t* newBuf = new uint16_t[wResolved.size() + 1];
std::copy(wResolved.begin(), wResolved.end(), newBuf);
newBuf[wResolved.size()] = 0;
std::string absPathStr = wideStringToString(newBuf);
DEBUG_LOG("\t-> abspath %s\n", absPathStr.c_str());
return newBuf;
}
}
}
@ -560,6 +606,7 @@ static void *resolveByName(const char *name) {
if (strcmp(name, "_errno") == 0) return (void*)msvcrt::_errno;
if (strcmp(name, "_wspawnvp") == 0) return (void*)msvcrt::_wspawnvp;
if (strcmp(name, "_wunlink") == 0) return (void*)msvcrt::_wunlink;
if (strcmp(name, "_wfullpath") == 0) return (void*)msvcrt::_wfullpath;
return nullptr;
}