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>
33 #define BB_DECLARE_EXTERN
37 /* ED: sparc termios is broken: revert back to old termio handling. */
38 #ifdef BB_FEATURE_USE_TERMIOS
41 # define termios termio
42 # define setTermSettings(fd,argp) ioctl(fd,TCSETAF,argp)
43 # define getTermSettings(fd,argp) ioctl(fd,TCGETA,argp)
46 # define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
47 # define getTermSettings(fd,argp) tcgetattr(fd, argp);
52 struct termios initial_settings, new_settings;
56 setTermSettings(fileno(cin), &initial_settings);
57 fprintf(stdout, "\n");
60 #endif /* BB_FEATURE_USE_TERMIOS */
63 static int terminal_width = 79; /* not 80 in case terminal has linefold bug */
64 static int terminal_height = 24;
67 extern int more_main(int argc, char **argv)
69 int c, lines = 0, input = 0;
70 int please_display_more_prompt = 0;
74 #if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS
75 struct winsize win = { 0, 0, 0, 0 };
85 file = fopen(*argv, "r");
91 fstat(fileno(file), &st);
93 #ifdef BB_FEATURE_USE_TERMIOS
94 cin = fopen("/dev/tty", "r");
96 cin = fopen("/dev/console", "r");
97 getTermSettings(fileno(cin), &initial_settings);
98 new_settings = initial_settings;
99 new_settings.c_cc[VMIN] = 1;
100 new_settings.c_cc[VTIME] = 0;
101 new_settings.c_lflag &= ~ICANON;
102 new_settings.c_lflag &= ~ECHO;
103 setTermSettings(fileno(cin), &new_settings);
105 # ifdef BB_FEATURE_AUTOWIDTH
106 ioctl(fileno(stdout), TIOCGWINSZ, &win);
108 terminal_height = win.ws_row - 2;
110 terminal_width = win.ws_col - 1;
113 (void) signal(SIGINT, gotsig);
114 (void) signal(SIGQUIT, gotsig);
115 (void) signal(SIGTERM, gotsig);
118 while ((c = getc(file)) != EOF) {
119 if (please_display_more_prompt) {
122 please_display_more_prompt = 0;
124 len = fprintf(stdout, "--More-- ");
126 len += fprintf(stdout, "(%d%% of %ld bytes)",
128 ((double) ftell(file) /
129 (double) st.st_size)),
132 len += fprintf(stdout, "%s",
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 */
156 while (++len <= terminal_width)
166 * There are two input streams to worry about here:
168 * c : the character we are reading from the file being "mored"
169 * input : a character received from the keyboard
171 * If we hit a newline in the _file_ stream, we want to test and
172 * see if any characters have been hit in the _input_ stream. This
173 * 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*/
182 please_display_more_prompt = 1;
185 if (++lines == terminal_height)
186 please_display_more_prompt = 1;
189 * If we just read a newline from the file being 'mored' and any
190 * key other than a return is hit, scroll by one page
198 } while (--argc > 0);
200 #ifdef BB_FEATURE_USE_TERMIOS