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>
35 /* ED: sparc termios is broken: revert back to old termio handling. */
36 #ifdef BB_FEATURE_USE_TERMIOS
39 # define termios termio
40 # define setTermSettings(fd,argp) ioctl(fd,TCSETAF,argp)
41 # define getTermSettings(fd,argp) ioctl(fd,TCGETA,argp)
44 # define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
45 # define getTermSettings(fd,argp) tcgetattr(fd, argp);
50 static struct termios initial_settings, new_settings;
52 static void gotsig(int sig)
54 setTermSettings(fileno(cin), &initial_settings);
58 #endif /* BB_FEATURE_USE_TERMIOS */
61 static int terminal_width = 79; /* not 80 in case terminal has linefold bug */
62 static int terminal_height = 24;
65 extern int more_main(int argc, char **argv)
67 int c, lines, input = 0;
68 int please_display_more_prompt;
73 #if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS
74 struct winsize win = { 0, 0, 0, 0 };
84 file = xfopen(*argv, "r");
86 fstat(fileno(file), &st);
88 #ifdef BB_FEATURE_USE_TERMIOS
89 cin = fopen("/dev/tty", "r");
91 cin = xfopen("/dev/console", "r");
92 getTermSettings(fileno(cin), &initial_settings);
93 new_settings = initial_settings;
94 new_settings.c_cc[VMIN] = 1;
95 new_settings.c_cc[VTIME] = 0;
96 new_settings.c_lflag &= ~ICANON;
97 new_settings.c_lflag &= ~ECHO;
98 setTermSettings(fileno(cin), &new_settings);
100 # ifdef BB_FEATURE_AUTOWIDTH
101 ioctl(fileno(stdout), TIOCGWINSZ, &win);
103 terminal_height = win.ws_row - 2;
105 terminal_width = win.ws_col - 1;
108 (void) signal(SIGINT, gotsig);
109 (void) signal(SIGQUIT, gotsig);
110 (void) signal(SIGTERM, gotsig);
115 page_height = terminal_height;
116 please_display_more_prompt = 0;
117 while ((c = getc(file)) != EOF) {
119 if (please_display_more_prompt) {
120 len = printf("--More-- ");
122 #if _FILE_OFFSET_BITS == 64
123 len += printf("(%d%% of %lld bytes)",
124 (int) (100 * ((double) ftell(file) /
125 (double) st.st_size)), (long long)st.st_size);
127 len += printf("(%d%% of %ld bytes)",
128 (int) (100 * ((double) ftell(file) /
129 (double) st.st_size)), (long)st.st_size);
133 #ifdef BB_FEATURE_USE_TERMIOS
143 * We've just displayed the "--More--" prompt, so now we need
144 * to get input from the user.
146 #ifdef BB_FEATURE_USE_TERMIOS
152 #ifdef BB_FEATURE_USE_TERMIOS
153 /* Erase the "More" message */
162 page_height = terminal_height;
163 please_display_more_prompt = 0;
170 * There are two input streams to worry about here:
172 * c : the character we are reading from the file being "mored"
173 * input : a character received from the keyboard
175 * If we hit a newline in the _file_ stream, we want to test and
176 * see if any characters have been hit in the _input_ stream. This
177 * allows the user to quit while in the middle of a file.
180 /* increment by just one line if we are at
181 * the end of this line */
183 please_display_more_prompt = 1;
184 /* Adjust the terminal height for any overlap, so that
185 * no lines get lost off the top. */
186 if (len >= terminal_width) {
187 div_t result = div( len, terminal_width);
190 page_height-=result.quot;
192 page_height-=(result.quot-1);
195 if (++lines >= page_height) {
196 please_display_more_prompt = 1;
201 * If we just read a newline from the file being 'mored' and any
202 * key other than a return is hit, scroll by one page
211 } while (--argc > 0);
213 #ifdef BB_FEATURE_USE_TERMIOS
214 setTermSettings(fileno(cin), &initial_settings);