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97310d0253
I've noticed a bug in the "autowidth" feature more, and is probably in others. The call to the function get_terminal_width_height() passes in a file descriptor but that file descriptor is never used, instead the ioctl() is called with 0. In more_main() the call to get_terminal_width_height() passes 0 as the file descriptor instead of fileno(cin). This isn't a problem when you more a file (e.g. "more /etc/passwd") but when you pipe a file to it (e.g. "cat /etc/passwd | more") the size of the terminal cannot be determined because file descriptor 0 is not a terminal. The fix is simple, I've attached a patch for more.c and get_terminal_width_height.c. BAPper
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Determine the width and height of the terminal.
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <unistd.h>
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#include <termios.h>
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#include <sys/ioctl.h>
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#include "busybox.h"
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/* It is perfectly ok to pass in a NULL for either width or for
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* height, in which case that value will not be set. It is also
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* perfectly ok to have CONFIG_FEATURE_AUTOWIDTH disabled, in
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* which case you will always get 80x24 */
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void get_terminal_width_height(int fd, int *width, int *height)
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{
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struct winsize win = { 0, 0, 0, 0 };
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#ifdef CONFIG_FEATURE_AUTOWIDTH
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if (ioctl(fd, TIOCGWINSZ, &win) != 0) {
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win.ws_row = 24;
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win.ws_col = 80;
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}
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#endif
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if (win.ws_row <= 1) {
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win.ws_row = 24;
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}
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if (win.ws_col <= 1) {
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win.ws_col = 80;
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}
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if (height) {
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*height = (int) win.ws_row;
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}
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if (width) {
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*width = (int) win.ws_col;
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}
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}
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/* END CODE */
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/*
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Local Variables:
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c-file-style: "linux"
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c-basic-offset: 4
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tab-width: 4
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End:
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*/
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