diff options
Diffstat (limited to 'lib/sh/winsize.c')
-rw-r--r-- | lib/sh/winsize.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/lib/sh/winsize.c b/lib/sh/winsize.c new file mode 100644 index 0000000..861c7c8 --- /dev/null +++ b/lib/sh/winsize.c @@ -0,0 +1,98 @@ +/* winsize.c - handle window size changes and information. */ + +/* Copyright (C) 2005-2020 Free Software Foundation, Inc. + + This file is part of GNU Bash, the Bourne Again SHell. + + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#include <stdc.h> + +#include "bashtypes.h" + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include <sys/ioctl.h> + +/* Try to find the definitions of `struct winsize' and TIOGCWINSZ */ + +#if 0 +#if defined (GWINSZ_IN_SYS_IOCTL) && !defined (TIOCGWINSZ) +# include <sys/ioctl.h> +#endif /* GWINSZ_IN_SYS_IOCTL && !TIOCGWINSZ */ +#endif + +#if defined (STRUCT_WINSIZE_IN_TERMIOS) && !defined (STRUCT_WINSIZE_IN_SYS_IOCTL) +# include <termios.h> +#endif /* STRUCT_WINSIZE_IN_TERMIOS && !STRUCT_WINSIZE_IN_SYS_IOCTL */ + +/* Not in either of the standard places, look around. */ +#if !defined (STRUCT_WINSIZE_IN_TERMIOS) && !defined (STRUCT_WINSIZE_IN_SYS_IOCTL) +# if defined (HAVE_SYS_STREAM_H) +# include <sys/stream.h> +# endif /* HAVE_SYS_STREAM_H */ +# if defined (HAVE_SYS_PTEM_H) /* SVR4.2, at least, has it here */ +# include <sys/ptem.h> +# define _IO_PTEM_H /* work around SVR4.2 1.1.4 bug */ +# endif /* HAVE_SYS_PTEM_H */ +# if defined (HAVE_SYS_PTE_H) /* ??? */ +# include <sys/pte.h> +# endif /* HAVE_SYS_PTE_H */ +#endif /* !STRUCT_WINSIZE_IN_TERMIOS && !STRUCT_WINSIZE_IN_SYS_IOCTL */ + +#include <stdio.h> + +/* Return the fd from which we are actually getting input. */ +#define input_tty() (shell_tty != -1) ? shell_tty : fileno (stderr) + +#if !defined (errno) +extern int errno; +#endif /* !errno */ + +extern int shell_tty; + +#if defined (READLINE) +extern void rl_set_screen_size PARAMS((int, int)); +#endif +extern void sh_set_lines_and_columns PARAMS((int, int)); + +void +get_new_window_size (from_sig, rp, cp) + int from_sig; + int *rp, *cp; +{ +#if defined (TIOCGWINSZ) + struct winsize win; + int tty; + + tty = input_tty (); + if (tty >= 0 && (ioctl (tty, TIOCGWINSZ, &win) == 0) && + win.ws_row > 0 && win.ws_col > 0) + { + sh_set_lines_and_columns (win.ws_row, win.ws_col); +#if defined (READLINE) + rl_set_screen_size (win.ws_row, win.ws_col); + if (rp) + *rp = win.ws_row; + if (cp) + *cp = win.ws_col; +#endif + } +#endif +} |