2 * Mini more implementation for busybox
5 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
7 * Latest version blended together by Erik Andersen <andersen@lineo.com>,
8 * based on the original more implementation by Bruce, and code from the
9 * Debian boot-floppies team.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 /* Turning this off makes things a bit smaller (and less pretty) */
29 #define BB_FEATURE_USE_TERMIOS
30 /* Turning this off makes things a bit smaller (and less pretty) */
31 #define BB_FEATURE_AUTOWIDTH
39 #include <sys/ioctl.h>
41 static const char more_usage[] = "more [file ...]\n";
43 /* ED: sparc termios is broken: revert back to old termio handling. */
44 #ifdef BB_FEATURE_USE_TERMIOS
47 # define USE_OLD_TERMIO
49 # define termios termio
50 # define stty(fd,argp) ioctl(fd,TCSETAF,argp)
53 # define stty(fd,argp) tcsetattr(fd,TCSANOW,argp)
57 struct termios initial_settings, new_settings;
59 void gotsig(int sig) {
60 stty(fileno(cin), &initial_settings);
61 fprintf(stdout, "\n");
68 #define TERMINAL_WIDTH 79 /* not 80 in case terminal has linefold bug */
69 #define TERMINAL_HEIGHT 24
72 #if defined BB_FEATURE_AUTOWIDTH
73 static int terminal_width = 0, terminal_height = 0;
75 #define terminal_width TERMINAL_WIDTH
76 #define terminal_height TERMINAL_HEIGHT
81 extern int more_main(int argc, char **argv)
83 int c, lines=0, input=0;
87 #ifdef BB_FEATURE_AUTOWIDTH
88 struct winsize win = {0,0};
94 if ( argc > 0 && (strcmp(*argv,"--help")==0 || strcmp(*argv,"-h")==0) ) {
102 file = fopen(*argv, "r");
108 fstat(fileno(file), &st);
110 #ifdef BB_FEATURE_USE_TERMIOS
111 cin = fopen("/dev/tty", "r");
113 cin = fopen("/dev/console", "r");
114 #ifdef USE_OLD_TERMIO
115 ioctl(fileno(cin),TCGETA,&initial_settings);
117 tcgetattr(fileno(cin),&initial_settings);
119 new_settings = initial_settings;
120 new_settings.c_lflag &= ~ICANON;
121 new_settings.c_lflag &= ~ECHO;
122 stty(fileno(cin), &new_settings);
124 #ifdef BB_FEATURE_AUTOWIDTH
125 ioctl(STDOUT_FILENO, TIOCGWINSZ, &win);
127 terminal_height = win.ws_row - 2;
129 terminal_width = win.ws_col - 1;
132 (void) signal(SIGINT, gotsig);
133 (void) signal(SIGQUIT, gotsig);
134 (void) signal(SIGTERM, gotsig);
137 while ((c = getc(file)) != EOF) {
142 len = fprintf(stdout, "--More-- ");
144 len += fprintf(stdout, "(%d%% of %ld bytes)",
145 (int) (100*( (double) ftell(file) / (double) st.st_size )),
148 len += fprintf(stdout, "%s",
149 #ifdef BB_FEATURE_USE_TERMIOS
159 #ifdef BB_FEATURE_USE_TERMIOS
160 /* Erase the "More" message */
163 while(++len <= terminal_width)
176 /* increment by just one line if we are at
177 * the end of this line*/
181 if ( ++lines == terminal_height )
190 } while (--argc > 0);
192 #ifdef BB_FEATURE_USE_TERMIOS