...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::process::v1::process_error — The exception usually thrown by boost.process.v1.
// In header: <boost/process/v1/exception.hpp> struct process_error : public std::system_error { };
It merely inherits std::system_error but can then be distinguished in the catch-block from other system errors.