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Eric Andersen4bea32a1999-10-06 00:30:51 +00001/*
2 * Mini more implementation for busybox
3 *
4 * Copyright (C) 1998 by Erik Andersen <andersee@debian.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
Eric Andersen3cf52d11999-10-12 22:26:06 +000022
23/* Turning this off makes things a bit smaller (and less pretty) */
24#define BB_MORE_TERM
25
26
27
Eric Andersencc8ed391999-10-05 16:24:54 +000028#include "internal.h"
29#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 Andersencc8ed391999-10-05 16:24:54 +000032
Eric Andersen3cf52d11999-10-12 22:26:06 +000033
Eric Andersene77ae3a1999-10-19 20:03:34 +000034static const char more_usage[] = "[file ...]";
Eric Andersencc8ed391999-10-05 16:24:54 +000035
Eric Andersen3cf52d11999-10-12 22:26:06 +000036
Eric Andersenf5a38381999-10-19 22:26:25 +000037/* ED: sparc termios is broken: revert back to old termio handling. */
Eric Andersen3cf52d11999-10-12 22:26:06 +000038#ifdef BB_MORE_TERM
Eric Andersenf5a38381999-10-19 22:26:25 +000039
40
41#if defined (__sparc__)
42# define USE_OLD_TERMIO
43# include <termio.h>
44# include <sys/ioctl.h>
45# define termios termio
46# define stty(fd,argp) ioctl(fd,TCSETAF,argp)
47#else
48# include <termios.h>
49# define stty(fd,argp) tcsetattr(fd,TCSANOW,argp)
50#endif
Eric Andersen3cf52d11999-10-12 22:26:06 +000051
52 FILE *cin;
53 struct termios initial_settings, new_settings;
54
55 void gotsig(int sig) {
Eric Andersenf5a38381999-10-19 22:26:25 +000056 stty(fileno(cin), &initial_settings);
Eric Andersen3cf52d11999-10-12 22:26:06 +000057 exit( TRUE);
58 }
59#endif
Eric Andersencc8ed391999-10-05 16:24:54 +000060
Eric Andersen4bea32a1999-10-06 00:30:51 +000061extern int more_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +000062{
Eric Andersen21943ce1999-10-13 18:04:51 +000063 int c, lines=0, input=0;
Eric Andersenf5a38381999-10-19 22:26:25 +000064 int next_page=0;
Eric Andersen4bea32a1999-10-06 00:30:51 +000065 struct stat st;
Eric Andersenf5a38381999-10-19 22:26:25 +000066 FILE *file;
Eric Andersen4bea32a1999-10-06 00:30:51 +000067
68 if ( strcmp(*argv,"--help")==0 || strcmp(*argv,"-h")==0 ) {
Eric Andersenb0e9a701999-10-18 22:28:26 +000069 usage (more_usage);
Eric Andersen4bea32a1999-10-06 00:30:51 +000070 }
71 argc--;
72 argv++;
73
Eric Andersenf5a38381999-10-19 22:26:25 +000074 while (argc >= 0) {
75 if (argc==0) {
76 file = stdin;
77 }
78 else
Eric Andersen9d3aba71999-10-06 09:04:55 +000079 file = fopen(*argv, "r");
Eric Andersenf5a38381999-10-19 22:26:25 +000080
Eric Andersen4bea32a1999-10-06 00:30:51 +000081 if (file == NULL) {
Eric Andersenef8b6c71999-10-20 08:05:35 +000082 perror(*argv);
Eric Andersen3cf52d11999-10-12 22:26:06 +000083 exit(FALSE);
Eric Andersencc8ed391999-10-05 16:24:54 +000084 }
Eric Andersen4bea32a1999-10-06 00:30:51 +000085 fstat(fileno(file), &st);
Eric Andersencc8ed391999-10-05 16:24:54 +000086
Eric Andersen3cf52d11999-10-12 22:26:06 +000087#ifdef BB_MORE_TERM
88 cin = fopen("/dev/tty", "r");
Eric Andersenf5a38381999-10-19 22:26:25 +000089 if (!cin)
90 cin = fopen("/dev/console", "r");
91#ifdef USE_OLD_TERMIO
92 ioctl(fileno(cin),TCGETA,&initial_settings);
93#else
Eric Andersen3cf52d11999-10-12 22:26:06 +000094 tcgetattr(fileno(cin),&initial_settings);
Eric Andersenf5a38381999-10-19 22:26:25 +000095#endif
Eric Andersen3cf52d11999-10-12 22:26:06 +000096 new_settings = initial_settings;
97 new_settings.c_lflag &= ~ICANON;
98 new_settings.c_lflag &= ~ECHO;
Eric Andersenf5a38381999-10-19 22:26:25 +000099 stty(fileno(cin), &new_settings);
Eric Andersen3cf52d11999-10-12 22:26:06 +0000100
101 (void) signal(SIGINT, gotsig);
102
Eric Andersen3cf52d11999-10-12 22:26:06 +0000103#endif
Eric Andersen4bea32a1999-10-06 00:30:51 +0000104 while ((c = getc(file)) != EOF) {
105 if ( next_page ) {
106 int len=0;
107 next_page = 0;
108 lines=0;
Eric Andersenf5a38381999-10-19 22:26:25 +0000109 len = fprintf(stdout, "--More-- ");
110 if (file != stdin) {
111 len += fprintf(stdout, "(%d%% of %ld bytes)",
Eric Andersen4bea32a1999-10-06 00:30:51 +0000112 (int) (100*( (double) ftell(file) / (double) st.st_size )),
Eric Andersenf5a38381999-10-19 22:26:25 +0000113 st.st_size);
114 }
115 len += fprintf(stdout, "%s",
Eric Andersen3cf52d11999-10-12 22:26:06 +0000116#ifdef BB_MORE_TERM
117 ""
118#else
119 "\n"
120#endif
121 );
122
Eric Andersen4bea32a1999-10-06 00:30:51 +0000123 fflush(stdout);
Eric Andersenf5a38381999-10-19 22:26:25 +0000124 input = getc( cin);
Eric Andersen3cf52d11999-10-12 22:26:06 +0000125
126#ifdef BB_MORE_TERM
127 /* Erase the "More" message */
Eric Andersen4bea32a1999-10-06 00:30:51 +0000128 while(len-- > 0)
129 putc('\b', stdout);
Eric Andersenf5a38381999-10-19 22:26:25 +0000130 while(len++ < 79)
Eric Andersen9d3aba71999-10-06 09:04:55 +0000131 putc(' ', stdout);
Eric Andersen4bea32a1999-10-06 00:30:51 +0000132 while(len-- > 0)
133 putc('\b', stdout);
134 fflush(stdout);
Eric Andersencc8ed391999-10-05 16:24:54 +0000135#endif
Eric Andersen3cf52d11999-10-12 22:26:06 +0000136
Eric Andersen4bea32a1999-10-06 00:30:51 +0000137 }
Eric Andersen3cf52d11999-10-12 22:26:06 +0000138 if (input=='q')
139 goto end;
140 if (input==' ' && c == '\n' )
141 next_page = 1;
Eric Andersenf5a38381999-10-19 22:26:25 +0000142 if ( c == '\n' && ++lines == 24 )
Eric Andersen4bea32a1999-10-06 00:30:51 +0000143 next_page = 1;
144 putc(c, stdout);
Eric Andersencc8ed391999-10-05 16:24:54 +0000145 }
Eric Andersen4bea32a1999-10-06 00:30:51 +0000146 fclose(file);
147 fflush(stdout);
148
149 argc--;
150 argv++;
151 }
Eric Andersen3cf52d11999-10-12 22:26:06 +0000152end:
153#ifdef BB_MORE_TERM
154 gotsig(0);
155#endif
156 exit(TRUE);
Eric Andersencc8ed391999-10-05 16:24:54 +0000157}
Eric Andersen4bea32a1999-10-06 00:30:51 +0000158