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