2 /* vi: set sw=4 ts=4: */
4 * Mini more implementation for busybox
7 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
9 * Latest version blended together by Erik Andersen <andersen@lineo.com>,
10 * based on the original more implementation by Bruce, and code from the
11 * Debian boot-floppies team.
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
34 #include <sys/ioctl.h>
35 #define BB_DECLARE_EXTERN
39 /* ED: sparc termios is broken: revert back to old termio handling. */
40 #ifdef BB_FEATURE_USE_TERMIOS
43 # define termios termio
44 # define setTermSettings(fd,argp) ioctl(fd,TCSETAF,argp)
45 # define getTermSettings(fd,argp) ioctl(fd,TCGETA,argp)
48 # define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
49 # define getTermSettings(fd,argp) tcgetattr(fd, argp);
54 static struct termios initial_settings, new_settings;
56 static void gotsig(int sig)
58 setTermSettings(fileno(cin), &initial_settings);
62 #endif /* BB_FEATURE_USE_TERMIOS */
65 static int terminal_width = 79; /* not 80 in case terminal has linefold bug */
66 static int terminal_height = 24;
69 extern int more_main(int argc, char **argv)
71 int c, lines = 0, input = 0;
72 int please_display_more_prompt = 0;
76 #if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS
77 struct winsize win = { 0, 0, 0, 0 };
87 file = xfopen(*argv, "r");
89 fstat(fileno(file), &st);
91 #ifdef BB_FEATURE_USE_TERMIOS
92 cin = fopen("/dev/tty", "r");
94 cin = fopen("/dev/console", "r");
95 getTermSettings(fileno(cin), &initial_settings);
96 new_settings = initial_settings;
97 new_settings.c_cc[VMIN] = 1;
98 new_settings.c_cc[VTIME] = 0;
99 new_settings.c_lflag &= ~ICANON;
100 new_settings.c_lflag &= ~ECHO;
101 setTermSettings(fileno(cin), &new_settings);
103 # ifdef BB_FEATURE_AUTOWIDTH
104 ioctl(fileno(stdout), TIOCGWINSZ, &win);
106 terminal_height = win.ws_row - 2;
108 terminal_width = win.ws_col - 1;
111 (void) signal(SIGINT, gotsig);
112 (void) signal(SIGQUIT, gotsig);
113 (void) signal(SIGTERM, gotsig);
116 while ((c = getc(file)) != EOF) {
117 if (please_display_more_prompt) {
120 please_display_more_prompt = 0;
122 len = printf("--More-- ");
124 #if _FILE_OFFSET_BITS == 64
125 len += printf("(%d%% of %lld bytes)",
127 len += printf("(%d%% of %ld bytes)",
130 ((double) ftell(file) /
131 (double) st.st_size)),
135 #ifdef BB_FEATURE_USE_TERMIOS
145 * We've just displayed the "--More--" prompt, so now we need
146 * to get input from the user.
148 #ifdef BB_FEATURE_USE_TERMIOS
154 #ifdef BB_FEATURE_USE_TERMIOS
155 /* Erase the "More" message */
158 while (++len <= terminal_width)
168 * There are two input streams to worry about here:
170 * c : the character we are reading from the file being "mored"
171 * input : a character received from the keyboard
173 * If we hit a newline in the _file_ stream, we want to test and
174 * see if any characters have been hit in the _input_ stream. This
175 * allows the user to quit while in the middle of a file.
182 /* increment by just one line if we are at
183 * the end of this line*/
184 please_display_more_prompt = 1;
187 if (++lines == terminal_height)
188 please_display_more_prompt = 1;
191 * If we just read a newline from the file being 'mored' and any
192 * key other than a return is hit, scroll by one page
200 } while (--argc > 0);
202 #ifdef BB_FEATURE_USE_TERMIOS