diff options
| -rw-r--r-- | ruby.c | 21 |
1 files changed, 19 insertions, 2 deletions
@@ -1647,6 +1647,23 @@ setup_pager_env(void) if (!getenv("LESS")) ruby_setenv("LESS", "-R"); // Output "raw" control characters. } +#ifdef _WIN32 +static int +tty_enabled(void) +{ + HANDLE h = GetStdHandle(STD_OUTPUT_HANDLE); + DWORD m; + if (!GetConsoleMode(h, &m)) return 0; +# ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING +# define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x200 +# endif + if (!(m & ENABLE_VIRTUAL_TERMINAL_PROCESSING)) return 0; + return 1; +} +#elif !defined(HAVE_WORKING_FORK) +# define tty_enabled() 0 +#endif + static VALUE process_options(int argc, char **argv, ruby_cmdline_options_t *opt) { @@ -1707,10 +1724,10 @@ process_options(int argc, char **argv, ruby_cmdline_options_t *opt) int oldout = dup(1); int olderr = dup(2); int fd = RFILE(port)->fptr->fd; + tty = tty_enabled(); dup2(fd, 1); dup2(fd, 2); - /* more.com doesn't support CSI sequence */ - usage(progname, 1, 0, columns); + usage(progname, 1, tty, columns); fflush(stdout); dup2(oldout, 1); dup2(olderr, 2); |