blob: bc3850510205b8d454eeb31e28668e5fde843b8b [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) */
28#define BB_MORE_TERM
29
30
31
Eric Andersencc8ed391999-10-05 16:24:54 +000032#include "internal.h"
33#include <stdio.h>
Eric Andersenf5a38381999-10-19 22:26:25 +000034#include <fcntl.h>
Eric Andersen4bea32a1999-10-06 00:30:51 +000035#include <signal.h>
Eric Andersencc8ed391999-10-05 16:24:54 +000036
Eric Andersen3cf52d11999-10-12 22:26:06 +000037
Eric Andersene77ae3a1999-10-19 20:03:34 +000038static const char more_usage[] = "[file ...]";
Eric Andersencc8ed391999-10-05 16:24:54 +000039
Eric Andersen3cf52d11999-10-12 22:26:06 +000040
Eric Andersenf5a38381999-10-19 22:26:25 +000041/* ED: sparc termios is broken: revert back to old termio handling. */
Eric Andersen3cf52d11999-10-12 22:26:06 +000042#ifdef BB_MORE_TERM
Eric Andersenf5a38381999-10-19 22:26:25 +000043
44
45#if defined (__sparc__)
46# define USE_OLD_TERMIO
47# include <termio.h>
48# include <sys/ioctl.h>
49# define termios termio
50# define stty(fd,argp) ioctl(fd,TCSETAF,argp)
51#else
52# include <termios.h>
53# define stty(fd,argp) tcsetattr(fd,TCSANOW,argp)
54#endif
Eric Andersen3cf52d11999-10-12 22:26:06 +000055
56 FILE *cin;
57 struct termios initial_settings, new_settings;
58
59 void gotsig(int sig) {
Eric Andersenf5a38381999-10-19 22:26:25 +000060 stty(fileno(cin), &initial_settings);
Eric Andersen3cf52d11999-10-12 22:26:06 +000061 exit( TRUE);
62 }
63#endif
Eric Andersencc8ed391999-10-05 16:24:54 +000064
Eric Andersen4bea32a1999-10-06 00:30:51 +000065extern int more_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +000066{
Eric Andersen21943ce1999-10-13 18:04:51 +000067 int c, lines=0, input=0;
Eric Andersenf5a38381999-10-19 22:26:25 +000068 int next_page=0;
Eric Andersen4bea32a1999-10-06 00:30:51 +000069 struct stat st;
Eric Andersenf5a38381999-10-19 22:26:25 +000070 FILE *file;
Eric Andersen4bea32a1999-10-06 00:30:51 +000071
72 if ( strcmp(*argv,"--help")==0 || strcmp(*argv,"-h")==0 ) {
Eric Andersenb0e9a701999-10-18 22:28:26 +000073 usage (more_usage);
Eric Andersen4bea32a1999-10-06 00:30:51 +000074 }
75 argc--;
76 argv++;
77
Eric Andersenf5a38381999-10-19 22:26:25 +000078 while (argc >= 0) {
79 if (argc==0) {
80 file = stdin;
81 }
82 else
Eric Andersen9d3aba71999-10-06 09:04:55 +000083 file = fopen(*argv, "r");
Eric Andersenf5a38381999-10-19 22:26:25 +000084
Eric Andersen4bea32a1999-10-06 00:30:51 +000085 if (file == NULL) {
Eric Andersenef8b6c71999-10-20 08:05:35 +000086 perror(*argv);
Eric Andersen3cf52d11999-10-12 22:26:06 +000087 exit(FALSE);
Eric Andersencc8ed391999-10-05 16:24:54 +000088 }
Eric Andersen4bea32a1999-10-06 00:30:51 +000089 fstat(fileno(file), &st);
Eric Andersencc8ed391999-10-05 16:24:54 +000090
Eric Andersen3cf52d11999-10-12 22:26:06 +000091#ifdef BB_MORE_TERM
92 cin = fopen("/dev/tty", "r");
Eric Andersenf5a38381999-10-19 22:26:25 +000093 if (!cin)
94 cin = fopen("/dev/console", "r");
95#ifdef USE_OLD_TERMIO
96 ioctl(fileno(cin),TCGETA,&initial_settings);
97#else
Eric Andersen3cf52d11999-10-12 22:26:06 +000098 tcgetattr(fileno(cin),&initial_settings);
Eric Andersenf5a38381999-10-19 22:26:25 +000099#endif
Eric Andersen3cf52d11999-10-12 22:26:06 +0000100 new_settings = initial_settings;
101 new_settings.c_lflag &= ~ICANON;
102 new_settings.c_lflag &= ~ECHO;
Eric Andersenf5a38381999-10-19 22:26:25 +0000103 stty(fileno(cin), &new_settings);
Eric Andersen3cf52d11999-10-12 22:26:06 +0000104
105 (void) signal(SIGINT, gotsig);
106
Eric Andersen3cf52d11999-10-12 22:26:06 +0000107#endif
Eric Andersen4bea32a1999-10-06 00:30:51 +0000108 while ((c = getc(file)) != EOF) {
109 if ( next_page ) {
110 int len=0;
111 next_page = 0;
112 lines=0;
Eric Andersenf5a38381999-10-19 22:26:25 +0000113 len = fprintf(stdout, "--More-- ");
114 if (file != stdin) {
115 len += fprintf(stdout, "(%d%% of %ld bytes)",
Eric Andersen4bea32a1999-10-06 00:30:51 +0000116 (int) (100*( (double) ftell(file) / (double) st.st_size )),
Eric Andersenf5a38381999-10-19 22:26:25 +0000117 st.st_size);
118 }
119 len += fprintf(stdout, "%s",
Eric Andersen3cf52d11999-10-12 22:26:06 +0000120#ifdef BB_MORE_TERM
121 ""
122#else
123 "\n"
124#endif
125 );
126
Eric Andersen4bea32a1999-10-06 00:30:51 +0000127 fflush(stdout);
Eric Andersenf5a38381999-10-19 22:26:25 +0000128 input = getc( cin);
Eric Andersen3cf52d11999-10-12 22:26:06 +0000129
130#ifdef BB_MORE_TERM
131 /* Erase the "More" message */
Eric Andersen4bea32a1999-10-06 00:30:51 +0000132 while(len-- > 0)
133 putc('\b', stdout);
Eric Andersenf5a38381999-10-19 22:26:25 +0000134 while(len++ < 79)
Eric Andersen9d3aba71999-10-06 09:04:55 +0000135 putc(' ', stdout);
Eric Andersen4bea32a1999-10-06 00:30:51 +0000136 while(len-- > 0)
137 putc('\b', stdout);
138 fflush(stdout);
Eric Andersencc8ed391999-10-05 16:24:54 +0000139#endif
Eric Andersen3cf52d11999-10-12 22:26:06 +0000140
Eric Andersen4bea32a1999-10-06 00:30:51 +0000141 }
Eric Andersen3cf52d11999-10-12 22:26:06 +0000142 if (input=='q')
143 goto end;
144 if (input==' ' && c == '\n' )
145 next_page = 1;
Eric Andersenf5a38381999-10-19 22:26:25 +0000146 if ( c == '\n' && ++lines == 24 )
Eric Andersen4bea32a1999-10-06 00:30:51 +0000147 next_page = 1;
148 putc(c, stdout);
Eric Andersencc8ed391999-10-05 16:24:54 +0000149 }
Eric Andersen4bea32a1999-10-06 00:30:51 +0000150 fclose(file);
151 fflush(stdout);
152
153 argc--;
154 argv++;
155 }
Eric Andersen3cf52d11999-10-12 22:26:06 +0000156end:
157#ifdef BB_MORE_TERM
158 gotsig(0);
159#endif
160 exit(TRUE);
Eric Andersencc8ed391999-10-05 16:24:54 +0000161}
Eric Andersen4bea32a1999-10-06 00:30:51 +0000162