blob: ffc8206f2bfbb22baa21b85fd8359138b21d6043 [file] [log] [blame]
Erik Andersene49d5ec2000-02-08 19:58:47 +00001/* vi: set sw=4 ts=4: */
Eric Andersen4bea32a1999-10-06 00:30:51 +00002/*
3 * Mini more implementation for busybox
4 *
Eric Andersenc4996011999-10-20 22:08:37 +00005 *
Eric Andersen96bcfd31999-11-12 01:30:18 +00006 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
7 *
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.
Eric Andersen4bea32a1999-10-06 00:30:51 +000011 *
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.
16 *
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.
21 *
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
25 *
26 */
27
Eric Andersen3570a342000-09-25 21:45:58 +000028#include "busybox.h"
Eric Andersencc8ed391999-10-05 16:24:54 +000029#include <stdio.h>
Eric Andersenf5a38381999-10-19 22:26:25 +000030#include <fcntl.h>
Eric Andersen4bea32a1999-10-06 00:30:51 +000031#include <signal.h>
Eric Andersen50d63601999-11-09 01:47:36 +000032#include <sys/ioctl.h>
Erik Andersen7ab9c7e2000-05-12 19:41:47 +000033#define BB_DECLARE_EXTERN
34#define bb_need_help
35#include "messages.c"
Eric Andersen3cf52d11999-10-12 22:26:06 +000036
Erik Andersen1d1d9502000-04-21 01:26:49 +000037/* ED: sparc termios is broken: revert back to old termio handling. */
Eric Andersen50d63601999-11-09 01:47:36 +000038#ifdef BB_FEATURE_USE_TERMIOS
Mark Whitley4fa84e62000-06-21 22:53:16 +000039# if #cpu(sparc)
40# include <termio.h>
41# define termios termio
42# define setTermSettings(fd,argp) ioctl(fd,TCSETAF,argp)
43# define getTermSettings(fd,argp) ioctl(fd,TCGETA,argp)
44# else
45# include <termios.h>
46# define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
47# define getTermSettings(fd,argp) tcgetattr(fd, argp);
48# endif
Eric Andersen3cf52d11999-10-12 22:26:06 +000049
Erik Andersene49d5ec2000-02-08 19:58:47 +000050FILE *cin;
Erik Andersen4f3f7572000-04-28 00:18:56 +000051
Eric Andersen63a86222000-11-07 06:52:13 +000052static struct termios initial_settings, new_settings;
Eric Andersen3cf52d11999-10-12 22:26:06 +000053
Erik Andersene49d5ec2000-02-08 19:58:47 +000054void gotsig(int sig)
55{
Erik Andersen1d1d9502000-04-21 01:26:49 +000056 setTermSettings(fileno(cin), &initial_settings);
Erik Andersene49d5ec2000-02-08 19:58:47 +000057 fprintf(stdout, "\n");
58 exit(TRUE);
59}
Mark Whitley4fa84e62000-06-21 22:53:16 +000060#endif /* BB_FEATURE_USE_TERMIOS */
Eric Andersencc8ed391999-10-05 16:24:54 +000061
Eric Andersen50d63601999-11-09 01:47:36 +000062
Mark Whitley4fa84e62000-06-21 22:53:16 +000063static int terminal_width = 79; /* not 80 in case terminal has linefold bug */
64static int terminal_height = 24;
Eric Andersen50d63601999-11-09 01:47:36 +000065
66
Eric Andersen4bea32a1999-10-06 00:30:51 +000067extern int more_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +000068{
Erik Andersene49d5ec2000-02-08 19:58:47 +000069 int c, lines = 0, input = 0;
Mark Whitleyb9913952000-06-16 00:26:51 +000070 int please_display_more_prompt = 0;
Erik Andersene49d5ec2000-02-08 19:58:47 +000071 struct stat st;
72 FILE *file;
73
Erik Andersen4f3f7572000-04-28 00:18:56 +000074#if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS
Pavel Roskinf626dcb2000-07-14 15:55:41 +000075 struct winsize win = { 0, 0, 0, 0 };
Eric Andersen50d63601999-11-09 01:47:36 +000076#endif
Eric Andersen4bea32a1999-10-06 00:30:51 +000077
Erik Andersene49d5ec2000-02-08 19:58:47 +000078 argc--;
Eric Andersen4bea32a1999-10-06 00:30:51 +000079 argv++;
Eric Andersen4bea32a1999-10-06 00:30:51 +000080
Erik Andersene49d5ec2000-02-08 19:58:47 +000081 do {
82 if (argc == 0) {
83 file = stdin;
84 } else
Matt Kraaibbaef662000-09-27 02:43:35 +000085 file = xfopen(*argv, "r");
Erik Andersene49d5ec2000-02-08 19:58:47 +000086
Erik Andersene49d5ec2000-02-08 19:58:47 +000087 fstat(fileno(file), &st);
88
89#ifdef BB_FEATURE_USE_TERMIOS
90 cin = fopen("/dev/tty", "r");
91 if (!cin)
92 cin = fopen("/dev/console", "r");
Erik Andersen1d1d9502000-04-21 01:26:49 +000093 getTermSettings(fileno(cin), &initial_settings);
Erik Andersene49d5ec2000-02-08 19:58:47 +000094 new_settings = initial_settings;
Erik Andersene90f4042000-04-21 21:53:58 +000095 new_settings.c_cc[VMIN] = 1;
96 new_settings.c_cc[VTIME] = 0;
Erik Andersene49d5ec2000-02-08 19:58:47 +000097 new_settings.c_lflag &= ~ICANON;
98 new_settings.c_lflag &= ~ECHO;
Erik Andersen1d1d9502000-04-21 01:26:49 +000099 setTermSettings(fileno(cin), &new_settings);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000100
Mark Whitley4fa84e62000-06-21 22:53:16 +0000101# ifdef BB_FEATURE_AUTOWIDTH
Erik Andersene49d5ec2000-02-08 19:58:47 +0000102 ioctl(fileno(stdout), TIOCGWINSZ, &win);
103 if (win.ws_row > 4)
104 terminal_height = win.ws_row - 2;
105 if (win.ws_col > 0)
106 terminal_width = win.ws_col - 1;
Mark Whitley4fa84e62000-06-21 22:53:16 +0000107# endif
Erik Andersene49d5ec2000-02-08 19:58:47 +0000108
109 (void) signal(SIGINT, gotsig);
110 (void) signal(SIGQUIT, gotsig);
111 (void) signal(SIGTERM, gotsig);
112
113#endif
114 while ((c = getc(file)) != EOF) {
Mark Whitleyb9913952000-06-16 00:26:51 +0000115 if (please_display_more_prompt) {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000116 int len = 0;
117
Mark Whitleyb9913952000-06-16 00:26:51 +0000118 please_display_more_prompt = 0;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000119 lines = 0;
120 len = fprintf(stdout, "--More-- ");
121 if (file != stdin) {
Eric Andersen8a2e56c2000-09-21 02:23:30 +0000122#if _FILE_OFFSET_BITS == 64
123 len += fprintf(stdout, "(%d%% of %lld bytes)",
124#else
Erik Andersene49d5ec2000-02-08 19:58:47 +0000125 len += fprintf(stdout, "(%d%% of %ld bytes)",
Eric Andersen8a2e56c2000-09-21 02:23:30 +0000126#endif
Erik Andersene49d5ec2000-02-08 19:58:47 +0000127 (int) (100 *
128 ((double) ftell(file) /
129 (double) st.st_size)),
130 st.st_size);
131 }
132 len += fprintf(stdout, "%s",
133#ifdef BB_FEATURE_USE_TERMIOS
134 ""
135#else
136 "\n"
137#endif
138 );
139
140 fflush(stdout);
Mark Whitleyb9913952000-06-16 00:26:51 +0000141
142 /*
143 * We've just displayed the "--More--" prompt, so now we need
144 * to get input from the user.
145 */
Erik Andersen4f3f7572000-04-28 00:18:56 +0000146#ifdef BB_FEATURE_USE_TERMIOS
Erik Andersene49d5ec2000-02-08 19:58:47 +0000147 input = getc(cin);
Erik Andersen4f3f7572000-04-28 00:18:56 +0000148#else
149 input = getc(stdin);
150#endif
Erik Andersene49d5ec2000-02-08 19:58:47 +0000151
152#ifdef BB_FEATURE_USE_TERMIOS
153 /* Erase the "More" message */
154 while (--len >= 0)
155 putc('\b', stdout);
156 while (++len <= terminal_width)
157 putc(' ', stdout);
158 while (--len >= 0)
159 putc('\b', stdout);
160 fflush(stdout);
161#endif
162
163 }
Mark Whitleyb9913952000-06-16 00:26:51 +0000164
165 /*
166 * There are two input streams to worry about here:
167 *
168 * c : the character we are reading from the file being "mored"
169 * input : a character received from the keyboard
170 *
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.
174 */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000175 if (c == '\n') {
176 switch (input) {
177 case 'q':
178 goto end;
179 case '\n':
180 /* increment by just one line if we are at
181 * the end of this line*/
Mark Whitleyb9913952000-06-16 00:26:51 +0000182 please_display_more_prompt = 1;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000183 break;
184 }
185 if (++lines == terminal_height)
Mark Whitleyb9913952000-06-16 00:26:51 +0000186 please_display_more_prompt = 1;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000187 }
Mark Whitley4fa84e62000-06-21 22:53:16 +0000188 /*
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
191 */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000192 putc(c, stdout);
193 }
194 fclose(file);
195 fflush(stdout);
196
197 argv++;
198 } while (--argc > 0);
199 end:
200#ifdef BB_FEATURE_USE_TERMIOS
201 gotsig(0);
202#endif
Eric Andersenb6106152000-06-19 17:25:40 +0000203 return(TRUE);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000204}