Savagedlight
commented
8 years ago Should actually rename ioctl_err to errno and store the value of the global variable 'errno' here. This will allow applications to get all the error information, even if their error reporting/parsing runs on a different thread than the one that made the library call.
The ioctl() command always returns 0 or -1 (success and failure respectively), and the actual error is stored in the thread-safe global errno variable. Remove ioctl_err and have applications use the global 'errno' variable to do their further checking.