diff options
| author | Boris Kolpackov <boris@codesynthesis.com> | 2018-06-14 18:13:04 +0200 |
|---|---|---|
| committer | Karen Arutyunov <karen@codesynthesis.com> | 2018-06-15 14:21:58 +0300 |
| commit | 481f9ba1aee62fea092184f2243d210a8686781f (patch) | |
| tree | a54fc536d835c5277038e145fabc1255c42ff8ac /libbutl/utility.mxx | |
| parent | 5d424ea127333859a32addaf9e28eae07a4dc9f6 (diff) | |
Add portable environment variable manipulation functions
Diffstat (limited to 'libbutl/utility.mxx')
| -rw-r--r-- | libbutl/utility.mxx | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/libbutl/utility.mxx b/libbutl/utility.mxx index 740b411..252a4b4 100644 --- a/libbutl/utility.mxx +++ b/libbutl/utility.mxx @@ -35,6 +35,9 @@ export module butl.utility; import std.core; import std.io; #endif +import butl.optional; +#else +#include <libbutl/optional.mxx> #endif #include <libbutl/export.hxx> @@ -183,6 +186,25 @@ LIBBUTL_MODEXPORT namespace butl bool eof (std::istream&); + // Environment variables. + // + optional<std::string> + getenv (const std::string&); + + // Throw system_error on failure. + // + // Note that on Windows setting an empty value usets the variable. + // + LIBBUTL_SYMEXPORT + void + setenv (const std::string& name, const std::string& value); + + // Throw system_error on failure. + // + LIBBUTL_SYMEXPORT + void + unsetenv (const std::string&); + // Key comparators (i.e., to be used in sets, maps, etc). // struct compare_c_string |