diff options
Diffstat (limited to 'nihil.posix/getenv.cc')
| -rw-r--r-- | nihil.posix/getenv.cc | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/nihil.posix/getenv.cc b/nihil.posix/getenv.cc deleted file mode 100644 index 36df950..0000000 --- a/nihil.posix/getenv.cc +++ /dev/null @@ -1,45 +0,0 @@ - -/* - * This source code is released into the public domain. - */ - -module; - -#include <cstdint> -#include <expected> -#include <string> -#include <system_error> -#include <vector> - -#include <unistd.h> - -module nihil.posix; - -import nihil.error; - -namespace nihil { - -auto getenv(std::string_view varname) -> std::expected<std::string, error> -{ - // Start with a buffer of this size, and double it every iteration. - constexpr auto bufinc = std::size_t{1024}; - - auto cvarname = std::string(varname); - auto buf = std::vector<char>(bufinc); - for (;;) { - auto const ret = ::getenv_r(cvarname.c_str(), - buf.data(), buf.size()); - - if (ret == 0) - return {std::string(buf.data())}; - - if (ret == -1 && errno == ERANGE) { - buf.resize(buf.size() * 2); - continue; - } - - return std::unexpected(error(std::errc(errno))); - } -} - -} // namespace nihil |
