blob: 05fe86970ade5ce5abafa96d52b8d900bafbbc54 [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 Andersen96bcfd31999-11-12 01:30:18 +00005 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
Eric Andersen1d1d2f92002-04-13 08:31:59 +00006 * Copyright (C) 1999-2002 by Erik Andersen <andersee@debian.org>
Eric Andersen96bcfd31999-11-12 01:30:18 +00007 *
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 *
Glenn L McGrath78b0e372001-06-26 02:06:08 +000012 * Termios corrects by Vladimir Oleynik <vodz@usa.net>
13 *
Eric Andersen4bea32a1999-10-06 00:30:51 +000014 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 * General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 *
28 */
29
Eric Andersencc8ed391999-10-05 16:24:54 +000030#include <stdio.h>
Eric Andersenf5a38381999-10-19 22:26:25 +000031#include <fcntl.h>
Eric Andersen4bea32a1999-10-06 00:30:51 +000032#include <signal.h>
Eric Andersened3ef502001-01-27 08:24:39 +000033#include <stdlib.h>
Glenn L McGrath78b0e372001-06-26 02:06:08 +000034#include <unistd.h>
Eric Andersen50d63601999-11-09 01:47:36 +000035#include <sys/ioctl.h>
Eric Andersencbe31da2001-02-20 06:14:08 +000036#include "busybox.h"
Eric Andersen3cf52d11999-10-12 22:26:06 +000037
Eric Andersen5c9c8b42001-01-26 06:50:46 +000038static FILE *cin;
Erik Andersen4f3f7572000-04-28 00:18:56 +000039
Eric Andersenbdfd0d72001-10-24 05:00:29 +000040#ifdef CONFIG_FEATURE_USE_TERMIOS
Glenn L McGrath78b0e372001-06-26 02:06:08 +000041#include <termios.h>
42#define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
43#define getTermSettings(fd,argp) tcgetattr(fd, argp);
44
Eric Andersen63a86222000-11-07 06:52:13 +000045static struct termios initial_settings, new_settings;
Eric Andersen3cf52d11999-10-12 22:26:06 +000046
Glenn L McGrath78b0e372001-06-26 02:06:08 +000047static void set_tty_to_initial_mode(void)
Erik Andersene49d5ec2000-02-08 19:58:47 +000048{
Erik Andersen1d1d9502000-04-21 01:26:49 +000049 setTermSettings(fileno(cin), &initial_settings);
Glenn L McGrath78b0e372001-06-26 02:06:08 +000050}
51
52static void gotsig(int sig)
53{
Matt Kraai12f417e2001-01-18 02:57:08 +000054 putchar('\n');
55 exit(EXIT_FAILURE);
Erik Andersene49d5ec2000-02-08 19:58:47 +000056}
Eric Andersenbdfd0d72001-10-24 05:00:29 +000057#endif /* CONFIG_FEATURE_USE_TERMIOS */
Eric Andersencc8ed391999-10-05 16:24:54 +000058
Eric Andersen50d63601999-11-09 01:47:36 +000059
Mark Whitley4fa84e62000-06-21 22:53:16 +000060static int terminal_width = 79; /* not 80 in case terminal has linefold bug */
61static int terminal_height = 24;
Eric Andersen50d63601999-11-09 01:47:36 +000062
63
Eric Andersen4bea32a1999-10-06 00:30:51 +000064extern int more_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +000065{
Eric Andersen57239342001-02-23 01:39:26 +000066 int c, lines, input = 0;
Glenn L McGrath78b0e372001-06-26 02:06:08 +000067 int please_display_more_prompt = -1;
Erik Andersene49d5ec2000-02-08 19:58:47 +000068 struct stat st;
69 FILE *file;
Eric Andersenffc40bf2001-02-22 21:49:32 +000070 int len, page_height;
Erik Andersene49d5ec2000-02-08 19:58:47 +000071
Eric Andersenbdfd0d72001-10-24 05:00:29 +000072#if defined CONFIG_FEATURE_AUTOWIDTH && defined CONFIG_FEATURE_USE_TERMIOS
Pavel Roskinf626dcb2000-07-14 15:55:41 +000073 struct winsize win = { 0, 0, 0, 0 };
Eric Andersen50d63601999-11-09 01:47:36 +000074#endif
Eric Andersen4bea32a1999-10-06 00:30:51 +000075
Erik Andersene49d5ec2000-02-08 19:58:47 +000076 argc--;
Eric Andersen4bea32a1999-10-06 00:30:51 +000077 argv++;
Eric Andersen4bea32a1999-10-06 00:30:51 +000078
Glenn L McGrath78b0e372001-06-26 02:06:08 +000079
80 /* not use inputing from terminal if usage: more > outfile */
81 if(isatty(fileno(stdout))) {
Matt Kraai439e3df2001-07-23 14:52:08 +000082 cin = fopen(CURRENT_TTY, "r");
Glenn L McGrath78b0e372001-06-26 02:06:08 +000083 if (!cin)
Matt Kraai439e3df2001-07-23 14:52:08 +000084 cin = xfopen(CONSOLE_DEV, "r");
Glenn L McGrath78b0e372001-06-26 02:06:08 +000085 please_display_more_prompt = 0;
Eric Andersenbdfd0d72001-10-24 05:00:29 +000086#ifdef CONFIG_FEATURE_USE_TERMIOS
Glenn L McGrath78b0e372001-06-26 02:06:08 +000087 getTermSettings(fileno(cin), &initial_settings);
88 new_settings = initial_settings;
89 new_settings.c_lflag &= ~ICANON;
90 new_settings.c_lflag &= ~ECHO;
91#ifndef linux
92 /* Hmm, in linux c_cc[] not parsed if set ~ICANON */
93 new_settings.c_cc[VMIN] = 1;
94 new_settings.c_cc[VTIME] = 0;
95#endif
96 setTermSettings(fileno(cin), &new_settings);
97 atexit(set_tty_to_initial_mode);
98 (void) signal(SIGINT, gotsig);
99 (void) signal(SIGQUIT, gotsig);
100 (void) signal(SIGTERM, gotsig);
101#endif
102 }
103
Erik Andersene49d5ec2000-02-08 19:58:47 +0000104 do {
105 if (argc == 0) {
106 file = stdin;
107 } else
Glenn L McGrath78b0e372001-06-26 02:06:08 +0000108 file = wfopen(*argv, "r");
109 if(file==0)
110 goto loop;
111
Eric Andersen0ee0a8d2001-12-06 07:24:29 +0000112 st.st_size = 0;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000113 fstat(fileno(file), &st);
114
Glenn L McGrath78b0e372001-06-26 02:06:08 +0000115 if(please_display_more_prompt>0)
116 please_display_more_prompt = 0;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000117
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000118#if defined CONFIG_FEATURE_AUTOWIDTH && defined CONFIG_FEATURE_USE_TERMIOS
Erik Andersene49d5ec2000-02-08 19:58:47 +0000119 ioctl(fileno(stdout), TIOCGWINSZ, &win);
120 if (win.ws_row > 4)
121 terminal_height = win.ws_row - 2;
122 if (win.ws_col > 0)
123 terminal_width = win.ws_col - 1;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000124#endif
Eric Andersen57239342001-02-23 01:39:26 +0000125 len=0;
126 lines = 0;
Eric Andersenffc40bf2001-02-22 21:49:32 +0000127 page_height = terminal_height;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000128 while ((c = getc(file)) != EOF) {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000129
Glenn L McGrath78b0e372001-06-26 02:06:08 +0000130 if (please_display_more_prompt>0) {
Matt Kraai12f417e2001-01-18 02:57:08 +0000131 len = printf("--More-- ");
Eric Andersen0ee0a8d2001-12-06 07:24:29 +0000132 if (file != stdin && st.st_size > 0) {
Eric Andersen8a2e56c2000-09-21 02:23:30 +0000133#if _FILE_OFFSET_BITS == 64
Matt Kraai12f417e2001-01-18 02:57:08 +0000134 len += printf("(%d%% of %lld bytes)",
Eric Andersen250a2212001-04-05 23:26:44 +0000135 (int) (100 * ((double) ftell(file) /
136 (double) st.st_size)), (long long)st.st_size);
Eric Andersen8a2e56c2000-09-21 02:23:30 +0000137#else
Matt Kraai12f417e2001-01-18 02:57:08 +0000138 len += printf("(%d%% of %ld bytes)",
Eric Andersen250a2212001-04-05 23:26:44 +0000139 (int) (100 * ((double) ftell(file) /
140 (double) st.st_size)), (long)st.st_size);
Eric Andersen8a2e56c2000-09-21 02:23:30 +0000141#endif
Erik Andersene49d5ec2000-02-08 19:58:47 +0000142 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000143
144 fflush(stdout);
Mark Whitleyb9913952000-06-16 00:26:51 +0000145
146 /*
147 * We've just displayed the "--More--" prompt, so now we need
148 * to get input from the user.
149 */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000150 input = getc(cin);
Eric Andersenbdfd0d72001-10-24 05:00:29 +0000151#ifndef CONFIG_FEATURE_USE_TERMIOS
Glenn L McGrath78b0e372001-06-26 02:06:08 +0000152 printf("\033[A"); /* up cursor */
Erik Andersen4f3f7572000-04-28 00:18:56 +0000153#endif
Erik Andersene49d5ec2000-02-08 19:58:47 +0000154 /* Erase the "More" message */
Eric Andersenaa21e0f2001-04-06 16:02:22 +0000155 putc('\r', stdout);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000156 while (--len >= 0)
Erik Andersene49d5ec2000-02-08 19:58:47 +0000157 putc(' ', stdout);
Eric Andersenaa21e0f2001-04-06 16:02:22 +0000158 putc('\r', stdout);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000159 fflush(stdout);
Eric Andersenbe30a6b2001-02-22 00:22:46 +0000160 len=0;
Eric Andersen57239342001-02-23 01:39:26 +0000161 lines = 0;
Eric Andersenffc40bf2001-02-22 21:49:32 +0000162 page_height = terminal_height;
Eric Andersen57239342001-02-23 01:39:26 +0000163 please_display_more_prompt = 0;
Matt Kraaid6cde0b2001-04-12 20:51:01 +0000164
165 if (input == 'q')
166 goto end;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000167 }
Mark Whitleyb9913952000-06-16 00:26:51 +0000168
169 /*
170 * There are two input streams to worry about here:
171 *
Eric Andersen57239342001-02-23 01:39:26 +0000172 * c : the character we are reading from the file being "mored"
Mark Whitleyb9913952000-06-16 00:26:51 +0000173 * input : a character received from the keyboard
174 *
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.
178 */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000179 if (c == '\n') {
Matt Kraaid6cde0b2001-04-12 20:51:01 +0000180 /* increment by just one line if we are at
181 * the end of this line */
182 if (input == '\n')
Glenn L McGrath78b0e372001-06-26 02:06:08 +0000183 if(please_display_more_prompt==0)
Mark Whitleyb9913952000-06-16 00:26:51 +0000184 please_display_more_prompt = 1;
Eric Andersenbe30a6b2001-02-22 00:22:46 +0000185 /* Adjust the terminal height for any overlap, so that
186 * no lines get lost off the top. */
Eric Andersen57239342001-02-23 01:39:26 +0000187 if (len >= terminal_width) {
Eric Andersen2439a592001-05-16 18:53:34 +0000188 int quot, rem;
189 quot = len / terminal_width;
190 rem = len - (quot * terminal_width);
191 if (quot) {
192 if (rem)
193 page_height-=quot;
Eric Andersenffc40bf2001-02-22 21:49:32 +0000194 else
Eric Andersen2439a592001-05-16 18:53:34 +0000195 page_height-=(quot-1);
Eric Andersenffc40bf2001-02-22 21:49:32 +0000196 }
Eric Andersenbe30a6b2001-02-22 00:22:46 +0000197 }
Eric Andersen57239342001-02-23 01:39:26 +0000198 if (++lines >= page_height) {
Glenn L McGrath78b0e372001-06-26 02:06:08 +0000199 if(please_display_more_prompt==0)
Mark Whitleyb9913952000-06-16 00:26:51 +0000200 please_display_more_prompt = 1;
Eric Andersenbe30a6b2001-02-22 00:22:46 +0000201 }
202 len=0;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000203 }
Mark Whitley4fa84e62000-06-21 22:53:16 +0000204 /*
205 * If we just read a newline from the file being 'mored' and any
206 * key other than a return is hit, scroll by one page
207 */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000208 putc(c, stdout);
Eric Andersenbe30a6b2001-02-22 00:22:46 +0000209 len++;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000210 }
211 fclose(file);
212 fflush(stdout);
Glenn L McGrath78b0e372001-06-26 02:06:08 +0000213loop:
Erik Andersene49d5ec2000-02-08 19:58:47 +0000214 argv++;
215 } while (--argc > 0);
216 end:
Matt Kraaid6cde0b2001-04-12 20:51:01 +0000217 return 0;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000218}