blob: b89143e4d6f14b3c61a440b8f3a63a8590be6a73 [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 Andersencc8ed391999-10-05 16:24:54 +000028#include <stdio.h>
Eric Andersenf5a38381999-10-19 22:26:25 +000029#include <fcntl.h>
Eric Andersen4bea32a1999-10-06 00:30:51 +000030#include <signal.h>
Eric Andersened3ef502001-01-27 08:24:39 +000031#include <stdlib.h>
Eric Andersen50d63601999-11-09 01:47:36 +000032#include <sys/ioctl.h>
Eric Andersencbe31da2001-02-20 06:14:08 +000033#include "busybox.h"
Erik Andersen7ab9c7e2000-05-12 19:41:47 +000034#define BB_DECLARE_EXTERN
35#define bb_need_help
36#include "messages.c"
Eric Andersen3cf52d11999-10-12 22:26:06 +000037
Erik Andersen1d1d9502000-04-21 01:26:49 +000038/* ED: sparc termios is broken: revert back to old termio handling. */
Eric Andersen50d63601999-11-09 01:47:36 +000039#ifdef BB_FEATURE_USE_TERMIOS
Mark Whitley4fa84e62000-06-21 22:53:16 +000040# if #cpu(sparc)
41# include <termio.h>
42# define termios termio
43# define setTermSettings(fd,argp) ioctl(fd,TCSETAF,argp)
44# define getTermSettings(fd,argp) ioctl(fd,TCGETA,argp)
45# else
46# include <termios.h>
47# define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
48# define getTermSettings(fd,argp) tcgetattr(fd, argp);
49# endif
Eric Andersen3cf52d11999-10-12 22:26:06 +000050
Eric Andersen5c9c8b42001-01-26 06:50:46 +000051static FILE *cin;
Erik Andersen4f3f7572000-04-28 00:18:56 +000052
Eric Andersen63a86222000-11-07 06:52:13 +000053static struct termios initial_settings, new_settings;
Eric Andersen3cf52d11999-10-12 22:26:06 +000054
Matt Kraaie6e81832000-12-30 07:46:23 +000055static void gotsig(int sig)
Erik Andersene49d5ec2000-02-08 19:58:47 +000056{
Erik Andersen1d1d9502000-04-21 01:26:49 +000057 setTermSettings(fileno(cin), &initial_settings);
Matt Kraai12f417e2001-01-18 02:57:08 +000058 putchar('\n');
59 exit(EXIT_FAILURE);
Erik Andersene49d5ec2000-02-08 19:58:47 +000060}
Mark Whitley4fa84e62000-06-21 22:53:16 +000061#endif /* BB_FEATURE_USE_TERMIOS */
Eric Andersencc8ed391999-10-05 16:24:54 +000062
Eric Andersen50d63601999-11-09 01:47:36 +000063
Mark Whitley4fa84e62000-06-21 22:53:16 +000064static int terminal_width = 79; /* not 80 in case terminal has linefold bug */
65static int terminal_height = 24;
Eric Andersen50d63601999-11-09 01:47:36 +000066
67
Eric Andersen4bea32a1999-10-06 00:30:51 +000068extern int more_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +000069{
Eric Andersen57239342001-02-23 01:39:26 +000070 int c, lines, input = 0;
71 int please_display_more_prompt;
Erik Andersene49d5ec2000-02-08 19:58:47 +000072 struct stat st;
73 FILE *file;
Eric Andersenffc40bf2001-02-22 21:49:32 +000074 int len, page_height;
Erik Andersene49d5ec2000-02-08 19:58:47 +000075
Erik Andersen4f3f7572000-04-28 00:18:56 +000076#if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS
Pavel Roskinf626dcb2000-07-14 15:55:41 +000077 struct winsize win = { 0, 0, 0, 0 };
Eric Andersen50d63601999-11-09 01:47:36 +000078#endif
Eric Andersen4bea32a1999-10-06 00:30:51 +000079
Erik Andersene49d5ec2000-02-08 19:58:47 +000080 argc--;
Eric Andersen4bea32a1999-10-06 00:30:51 +000081 argv++;
Eric Andersen4bea32a1999-10-06 00:30:51 +000082
Erik Andersene49d5ec2000-02-08 19:58:47 +000083 do {
84 if (argc == 0) {
85 file = stdin;
86 } else
Matt Kraaibbaef662000-09-27 02:43:35 +000087 file = xfopen(*argv, "r");
Erik Andersene49d5ec2000-02-08 19:58:47 +000088
Erik Andersene49d5ec2000-02-08 19:58:47 +000089 fstat(fileno(file), &st);
90
91#ifdef BB_FEATURE_USE_TERMIOS
92 cin = fopen("/dev/tty", "r");
93 if (!cin)
Eric Andersen21af7522001-03-23 17:09:15 +000094 cin = xfopen("/dev/console", "r");
Erik Andersen1d1d9502000-04-21 01:26:49 +000095 getTermSettings(fileno(cin), &initial_settings);
Erik Andersene49d5ec2000-02-08 19:58:47 +000096 new_settings = initial_settings;
Erik Andersene90f4042000-04-21 21:53:58 +000097 new_settings.c_cc[VMIN] = 1;
98 new_settings.c_cc[VTIME] = 0;
Erik Andersene49d5ec2000-02-08 19:58:47 +000099 new_settings.c_lflag &= ~ICANON;
100 new_settings.c_lflag &= ~ECHO;
Erik Andersen1d1d9502000-04-21 01:26:49 +0000101 setTermSettings(fileno(cin), &new_settings);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000102
Mark Whitley4fa84e62000-06-21 22:53:16 +0000103# ifdef BB_FEATURE_AUTOWIDTH
Erik Andersene49d5ec2000-02-08 19:58:47 +0000104 ioctl(fileno(stdout), TIOCGWINSZ, &win);
105 if (win.ws_row > 4)
106 terminal_height = win.ws_row - 2;
107 if (win.ws_col > 0)
108 terminal_width = win.ws_col - 1;
Mark Whitley4fa84e62000-06-21 22:53:16 +0000109# endif
Erik Andersene49d5ec2000-02-08 19:58:47 +0000110
111 (void) signal(SIGINT, gotsig);
112 (void) signal(SIGQUIT, gotsig);
113 (void) signal(SIGTERM, gotsig);
114
115#endif
Eric Andersen57239342001-02-23 01:39:26 +0000116 len=0;
117 lines = 0;
Eric Andersenffc40bf2001-02-22 21:49:32 +0000118 page_height = terminal_height;
Eric Andersen57239342001-02-23 01:39:26 +0000119 please_display_more_prompt = 0;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000120 while ((c = getc(file)) != EOF) {
Erik Andersene49d5ec2000-02-08 19:58:47 +0000121
Eric Andersenbe30a6b2001-02-22 00:22:46 +0000122 if (please_display_more_prompt) {
Matt Kraai12f417e2001-01-18 02:57:08 +0000123 len = printf("--More-- ");
Erik Andersene49d5ec2000-02-08 19:58:47 +0000124 if (file != stdin) {
Eric Andersen8a2e56c2000-09-21 02:23:30 +0000125#if _FILE_OFFSET_BITS == 64
Matt Kraai12f417e2001-01-18 02:57:08 +0000126 len += printf("(%d%% of %lld bytes)",
Eric Andersen8a2e56c2000-09-21 02:23:30 +0000127#else
Matt Kraai12f417e2001-01-18 02:57:08 +0000128 len += printf("(%d%% of %ld bytes)",
Eric Andersen8a2e56c2000-09-21 02:23:30 +0000129#endif
Erik Andersene49d5ec2000-02-08 19:58:47 +0000130 (int) (100 *
131 ((double) ftell(file) /
132 (double) st.st_size)),
133 st.st_size);
134 }
Matt Kraai12f417e2001-01-18 02:57:08 +0000135 len += printf("%s",
Erik Andersene49d5ec2000-02-08 19:58:47 +0000136#ifdef BB_FEATURE_USE_TERMIOS
137 ""
138#else
139 "\n"
140#endif
141 );
142
143 fflush(stdout);
Mark Whitleyb9913952000-06-16 00:26:51 +0000144
145 /*
146 * We've just displayed the "--More--" prompt, so now we need
147 * to get input from the user.
148 */
Erik Andersen4f3f7572000-04-28 00:18:56 +0000149#ifdef BB_FEATURE_USE_TERMIOS
Erik Andersene49d5ec2000-02-08 19:58:47 +0000150 input = getc(cin);
Erik Andersen4f3f7572000-04-28 00:18:56 +0000151#else
152 input = getc(stdin);
153#endif
Erik Andersene49d5ec2000-02-08 19:58:47 +0000154
155#ifdef BB_FEATURE_USE_TERMIOS
156 /* Erase the "More" message */
157 while (--len >= 0)
158 putc('\b', stdout);
159 while (++len <= terminal_width)
160 putc(' ', stdout);
161 while (--len >= 0)
162 putc('\b', stdout);
163 fflush(stdout);
164#endif
Eric Andersenbe30a6b2001-02-22 00:22:46 +0000165 len=0;
Eric Andersen57239342001-02-23 01:39:26 +0000166 lines = 0;
Eric Andersenffc40bf2001-02-22 21:49:32 +0000167 page_height = terminal_height;
Eric Andersen57239342001-02-23 01:39:26 +0000168 please_display_more_prompt = 0;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000169 }
Mark Whitleyb9913952000-06-16 00:26:51 +0000170
171 /*
172 * There are two input streams to worry about here:
173 *
Eric Andersen57239342001-02-23 01:39:26 +0000174 * c : the character we are reading from the file being "mored"
Mark Whitleyb9913952000-06-16 00:26:51 +0000175 * input : a character received from the keyboard
176 *
177 * If we hit a newline in the _file_ stream, we want to test and
178 * see if any characters have been hit in the _input_ stream. This
179 * allows the user to quit while in the middle of a file.
180 */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000181 if (c == '\n') {
182 switch (input) {
183 case 'q':
184 goto end;
185 case '\n':
186 /* increment by just one line if we are at
187 * the end of this line*/
Mark Whitleyb9913952000-06-16 00:26:51 +0000188 please_display_more_prompt = 1;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000189 break;
190 }
Eric Andersenbe30a6b2001-02-22 00:22:46 +0000191 /* Adjust the terminal height for any overlap, so that
192 * no lines get lost off the top. */
Eric Andersen57239342001-02-23 01:39:26 +0000193 if (len >= terminal_width) {
Eric Andersenbe30a6b2001-02-22 00:22:46 +0000194 div_t result = div( len, terminal_width);
Eric Andersenffc40bf2001-02-22 21:49:32 +0000195 if (result.quot) {
196 if (result.rem)
197 page_height-=result.quot;
198 else
199 page_height-=(result.quot-1);
200 }
Eric Andersenbe30a6b2001-02-22 00:22:46 +0000201 }
Eric Andersen57239342001-02-23 01:39:26 +0000202 if (++lines >= page_height) {
Mark Whitleyb9913952000-06-16 00:26:51 +0000203 please_display_more_prompt = 1;
Eric Andersenbe30a6b2001-02-22 00:22:46 +0000204 }
205 len=0;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000206 }
Mark Whitley4fa84e62000-06-21 22:53:16 +0000207 /*
208 * If we just read a newline from the file being 'mored' and any
209 * key other than a return is hit, scroll by one page
210 */
Erik Andersene49d5ec2000-02-08 19:58:47 +0000211 putc(c, stdout);
Eric Andersenbe30a6b2001-02-22 00:22:46 +0000212 len++;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000213 }
214 fclose(file);
215 fflush(stdout);
216
217 argv++;
218 } while (--argc > 0);
219 end:
220#ifdef BB_FEATURE_USE_TERMIOS
221 gotsig(0);
222#endif
Eric Andersenb6106152000-06-19 17:25:40 +0000223 return(TRUE);
Erik Andersene49d5ec2000-02-08 19:58:47 +0000224}