1 /* vi: set sw=4 ts=4: */
3 * Mini more implementation for busybox
6 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
8 * Latest version blended together by Erik Andersen <andersen@lineo.com>,
9 * based on the original more implementation by Bruce, and code from the
10 * Debian boot-floppies team.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 #include <sys/ioctl.h>
34 #define BB_DECLARE_EXTERN
38 /* ED: sparc termios is broken: revert back to old termio handling. */
39 #ifdef BB_FEATURE_USE_TERMIOS
42 # define termios termio
43 # define setTermSettings(fd,argp) ioctl(fd,TCSETAF,argp)
44 # define getTermSettings(fd,argp) ioctl(fd,TCGETA,argp)
47 # define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
48 # define getTermSettings(fd,argp) tcgetattr(fd, argp);
53 static struct termios initial_settings, new_settings;
55 static void gotsig(int sig)
57 setTermSettings(fileno(cin), &initial_settings);
61 #endif /* BB_FEATURE_USE_TERMIOS */
64 static int terminal_width = 79; /* not 80 in case terminal has linefold bug */
65 static int terminal_height = 24;
68 extern int more_main(int argc, char **argv)
70 int c, lines, input = 0;
71 int please_display_more_prompt;
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);
118 page_height = terminal_height;
119 please_display_more_prompt = 0;
120 while ((c = getc(file)) != EOF) {
122 if (please_display_more_prompt) {
123 len = printf("--More-- ");
125 #if _FILE_OFFSET_BITS == 64
126 len += printf("(%d%% of %lld bytes)",
128 len += printf("(%d%% of %ld bytes)",
131 ((double) ftell(file) /
132 (double) st.st_size)),
136 #ifdef BB_FEATURE_USE_TERMIOS
146 * We've just displayed the "--More--" prompt, so now we need
147 * to get input from the user.
149 #ifdef BB_FEATURE_USE_TERMIOS
155 #ifdef BB_FEATURE_USE_TERMIOS
156 /* Erase the "More" message */
159 while (++len <= terminal_width)
167 page_height = terminal_height;
168 please_display_more_prompt = 0;
172 * There are two input streams to worry about here:
174 * c : the character we are reading from the file being "mored"
175 * input : a character received from the keyboard
177 * If we hit a newline in the _file_ stream, we want to test and
178 * see if any characters have been hit in the _input_ stream. This
179 * allows the user to quit while in the middle of a file.
186 /* increment by just one line if we are at
187 * the end of this line*/
188 please_display_more_prompt = 1;
191 /* Adjust the terminal height for any overlap, so that
192 * no lines get lost off the top. */
193 if (len >= terminal_width) {
194 div_t result = div( len, terminal_width);
197 page_height-=result.quot;
199 page_height-=(result.quot-1);
202 if (++lines >= page_height) {
203 please_display_more_prompt = 1;
208 * If we just read a newline from the file being 'mored' and any
209 * key other than a return is hit, scroll by one page
218 } while (--argc > 0);
220 #ifdef BB_FEATURE_USE_TERMIOS