Verified Commit 9e5325a5 authored by Tommaso Tocci's avatar Tommaso Tocci
Browse files

support getcwd with 0 size 

when size is 0 the buffer to host the path of CWD must be allocated by
us
parent 4ebf4d77

ifs/src/preload/intcp_functions.cpp

+10 −1
Original line number Diff line number Diff line
@@ -1372,11 +1372,20 @@ char *getcwd(char *buf, size_t size) { 
        return LIBC_FUNC(getcwd, buf, size);

    }

    CTX->log()->trace("{}() called with size {}", __func__, size);

    if(CTX->cwd().size() + 1 > size) {



    if(size == 0) {

        buf = static_cast<char*>(malloc(CTX->cwd().size() +  1));

        if(buf == nullptr){

            CTX->log()->error("{}() failed to allocate buffer of size {}", __func__, CTX->cwd().size());

            errno = ENOMEM;

            return nullptr;

        }

    } else if(CTX->cwd().size() + 1 > size) {

        CTX->log()->error("{}() buffer too small to host current working dir", __func__);

        errno = ERANGE;

        return nullptr;

    }



    strcpy(buf, CTX->cwd().c_str());

    return buf;

}