blob: 515857e0f16caa7d7632b5cce9a25c2319386e44 [file] [log] [blame]
Eric Andersen4bea32a1999-10-06 00:30:51 +00001/*
2 * Mini more implementation for busybox
3 *
Eric Andersenc4996011999-10-20 22:08:37 +00004 *
5 * Copyright (C) 1999 by Lineo, inc.
6 * Blended by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
7 * based on the original more implementation and code from the Debian
8 * boot-floppies team.
Eric Andersen4bea32a1999-10-06 00:30:51 +00009 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 */
25
Eric Andersen3cf52d11999-10-12 22:26:06 +000026
27/* Turning this off makes things a bit smaller (and less pretty) */
Eric Andersen50d63601999-11-09 01:47:36 +000028#define BB_FEATURE_USE_TERMIOS
29/* Turning this off makes things a bit smaller (and less pretty) */
30#define BB_FEATURE_AUTOWIDTH
Eric Andersen3cf52d11999-10-12 22:26:06 +000031
32
33
Eric Andersencc8ed391999-10-05 16:24:54 +000034#include "internal.h"
35#include <stdio.h>
Eric Andersenf5a38381999-10-19 22:26:25 +000036#include <fcntl.h>
Eric Andersen4bea32a1999-10-06 00:30:51 +000037#include <signal.h>
Eric Andersen50d63601999-11-09 01:47:36 +000038#include <sys/ioctl.h>
Eric Andersen3cf52d11999-10-12 22:26:06 +000039
Eric Andersend73dc5b1999-11-10 23:13:02 +000040static const char more_usage[] = "more [file ...]\n";
Eric Andersencc8ed391999-10-05 16:24:54 +000041
Eric Andersenf5a38381999-10-19 22:26:25 +000042/* ED: sparc termios is broken: revert back to old termio handling. */
Eric Andersen50d63601999-11-09 01:47:36 +000043#ifdef BB_FEATURE_USE_TERMIOS
Eric Andersenf5a38381999-10-19 22:26:25 +000044
Eric Andersenfbb39c81999-11-08 17:00:52 +000045#if #cpu(sparc)
Eric Andersenf5a38381999-10-19 22:26:25 +000046# define USE_OLD_TERMIO
47# include <termio.h>
Eric Andersenf5a38381999-10-19 22:26:25 +000048# define termios termio
49# define stty(fd,argp) ioctl(fd,TCSETAF,argp)
50#else
51# include <termios.h>
52# define stty(fd,argp) tcsetattr(fd,TCSANOW,argp)
53#endif
Eric Andersen3cf52d11999-10-12 22:26:06 +000054
55 FILE *cin;
56 struct termios initial_settings, new_settings;
57
58 void gotsig(int sig) {
Eric Andersenf5a38381999-10-19 22:26:25 +000059 stty(fileno(cin), &initial_settings);
Eric Andersen50d63601999-11-09 01:47:36 +000060 fprintf(stdout, "\n");
Eric Andersen3cf52d11999-10-12 22:26:06 +000061 exit( TRUE);
62 }
63#endif
Eric Andersencc8ed391999-10-05 16:24:54 +000064
Eric Andersen50d63601999-11-09 01:47:36 +000065
66
67#define TERMINAL_WIDTH 79 /* not 80 in case terminal has linefold bug */
68#define TERMINAL_HEIGHT 24
69
70
71#if defined BB_FEATURE_AUTOWIDTH && ! defined USE_OLD_TERMIO
72static int terminal_width = 0, terminal_height = 0;
73#else
74#define terminal_width TERMINAL_WIDTH
75#define terminal_height TERMINAL_HEIGHT
76#endif
77
78
79
Eric Andersen4bea32a1999-10-06 00:30:51 +000080extern int more_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +000081{
Eric Andersen21943ce1999-10-13 18:04:51 +000082 int c, lines=0, input=0;
Eric Andersenf5a38381999-10-19 22:26:25 +000083 int next_page=0;
Eric Andersen4bea32a1999-10-06 00:30:51 +000084 struct stat st;
Eric Andersenf5a38381999-10-19 22:26:25 +000085 FILE *file;
Eric Andersen50d63601999-11-09 01:47:36 +000086#ifdef BB_FEATURE_AUTOWIDTH
87 struct winsize win;
88#endif
Eric Andersen4bea32a1999-10-06 00:30:51 +000089
Eric Andersen4bea32a1999-10-06 00:30:51 +000090 argc--;
91 argv++;
92
Eric Andersenfbb39c81999-11-08 17:00:52 +000093 if ( argc > 0 && (strcmp(*argv,"--help")==0 || strcmp(*argv,"-h")==0) ) {
94 usage (more_usage);
95 }
96 do {
Eric Andersenf5a38381999-10-19 22:26:25 +000097 if (argc==0) {
98 file = stdin;
99 }
100 else
Eric Andersen9d3aba71999-10-06 09:04:55 +0000101 file = fopen(*argv, "r");
Eric Andersenf5a38381999-10-19 22:26:25 +0000102
Eric Andersen4bea32a1999-10-06 00:30:51 +0000103 if (file == NULL) {
Eric Andersenef8b6c71999-10-20 08:05:35 +0000104 perror(*argv);
Eric Andersen3cf52d11999-10-12 22:26:06 +0000105 exit(FALSE);
Eric Andersencc8ed391999-10-05 16:24:54 +0000106 }
Eric Andersen4bea32a1999-10-06 00:30:51 +0000107 fstat(fileno(file), &st);
Eric Andersencc8ed391999-10-05 16:24:54 +0000108
Eric Andersen50d63601999-11-09 01:47:36 +0000109#ifdef BB_FEATURE_USE_TERMIOS
Eric Andersen3cf52d11999-10-12 22:26:06 +0000110 cin = fopen("/dev/tty", "r");
Eric Andersenf5a38381999-10-19 22:26:25 +0000111 if (!cin)
112 cin = fopen("/dev/console", "r");
113#ifdef USE_OLD_TERMIO
114 ioctl(fileno(cin),TCGETA,&initial_settings);
115#else
Eric Andersen3cf52d11999-10-12 22:26:06 +0000116 tcgetattr(fileno(cin),&initial_settings);
Eric Andersenf5a38381999-10-19 22:26:25 +0000117#endif
Eric Andersen3cf52d11999-10-12 22:26:06 +0000118 new_settings = initial_settings;
119 new_settings.c_lflag &= ~ICANON;
120 new_settings.c_lflag &= ~ECHO;
Eric Andersenf5a38381999-10-19 22:26:25 +0000121 stty(fileno(cin), &new_settings);
Eric Andersen50d63601999-11-09 01:47:36 +0000122
123#ifdef BB_FEATURE_AUTOWIDTH
124 ioctl(STDOUT_FILENO, TIOCGWINSZ, &win);
125 if (win.ws_row > 4)
126 terminal_height = win.ws_row - 2;
127 if (win.ws_col > 0)
128 terminal_width = win.ws_col - 1;
129#endif
130
Eric Andersen3cf52d11999-10-12 22:26:06 +0000131 (void) signal(SIGINT, gotsig);
Eric Andersenfbb39c81999-11-08 17:00:52 +0000132 (void) signal(SIGQUIT, gotsig);
133 (void) signal(SIGTERM, gotsig);
134
Eric Andersen3cf52d11999-10-12 22:26:06 +0000135#endif
Eric Andersen4bea32a1999-10-06 00:30:51 +0000136 while ((c = getc(file)) != EOF) {
137 if ( next_page ) {
138 int len=0;
139 next_page = 0;
140 lines=0;
Eric Andersenf5a38381999-10-19 22:26:25 +0000141 len = fprintf(stdout, "--More-- ");
142 if (file != stdin) {
143 len += fprintf(stdout, "(%d%% of %ld bytes)",
Eric Andersen4bea32a1999-10-06 00:30:51 +0000144 (int) (100*( (double) ftell(file) / (double) st.st_size )),
Eric Andersenf5a38381999-10-19 22:26:25 +0000145 st.st_size);
146 }
147 len += fprintf(stdout, "%s",
Eric Andersen50d63601999-11-09 01:47:36 +0000148#ifdef BB_FEATURE_USE_TERMIOS
Eric Andersen3cf52d11999-10-12 22:26:06 +0000149 ""
150#else
151 "\n"
152#endif
153 );
154
Eric Andersen4bea32a1999-10-06 00:30:51 +0000155 fflush(stdout);
Eric Andersenf5a38381999-10-19 22:26:25 +0000156 input = getc( cin);
Eric Andersen3cf52d11999-10-12 22:26:06 +0000157
Eric Andersen50d63601999-11-09 01:47:36 +0000158#ifdef BB_FEATURE_USE_TERMIOS
Eric Andersen3cf52d11999-10-12 22:26:06 +0000159 /* Erase the "More" message */
Eric Andersen50d63601999-11-09 01:47:36 +0000160 while(--len >= 0)
Eric Andersen4bea32a1999-10-06 00:30:51 +0000161 putc('\b', stdout);
Eric Andersen50d63601999-11-09 01:47:36 +0000162 while(++len <= terminal_width)
Eric Andersen9d3aba71999-10-06 09:04:55 +0000163 putc(' ', stdout);
Eric Andersen50d63601999-11-09 01:47:36 +0000164 while(--len >= 0)
Eric Andersen4bea32a1999-10-06 00:30:51 +0000165 putc('\b', stdout);
166 fflush(stdout);
Eric Andersencc8ed391999-10-05 16:24:54 +0000167#endif
Eric Andersen3cf52d11999-10-12 22:26:06 +0000168
Eric Andersen4bea32a1999-10-06 00:30:51 +0000169 }
Eric Andersen50d63601999-11-09 01:47:36 +0000170 if (c == '\n' ) {
171 switch(input) {
172 case 'q':
173 goto end;
174 case '\n':
175 /* increment by just one line if we are at
176 * the end of this line*/
177 next_page = 1;
178 break;
179 }
180 if ( ++lines == terminal_height )
181 next_page = 1;
182 }
Eric Andersen4bea32a1999-10-06 00:30:51 +0000183 putc(c, stdout);
Eric Andersencc8ed391999-10-05 16:24:54 +0000184 }
Eric Andersen4bea32a1999-10-06 00:30:51 +0000185 fclose(file);
186 fflush(stdout);
187
Eric Andersen4bea32a1999-10-06 00:30:51 +0000188 argv++;
Eric Andersenfbb39c81999-11-08 17:00:52 +0000189 } while (--argc > 0);
Eric Andersen3cf52d11999-10-12 22:26:06 +0000190end:
Eric Andersen50d63601999-11-09 01:47:36 +0000191#ifdef BB_FEATURE_USE_TERMIOS
Eric Andersen3cf52d11999-10-12 22:26:06 +0000192 gotsig(0);
193#endif
194 exit(TRUE);
Eric Andersencc8ed391999-10-05 16:24:54 +0000195}
Eric Andersen4bea32a1999-10-06 00:30:51 +0000196