Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Eric Andersen | 4bea32a | 1999-10-06 00:30:51 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Mini more implementation for busybox |
| 4 | * |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 5 | * |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 6 | * 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 Andersen | 4bea32a | 1999-10-06 00:30:51 +0000 | [diff] [blame] | 11 | * |
| 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 Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 28 | #include "internal.h" |
| 29 | #include <stdio.h> |
Eric Andersen | f5a3838 | 1999-10-19 22:26:25 +0000 | [diff] [blame] | 30 | #include <fcntl.h> |
Eric Andersen | 4bea32a | 1999-10-06 00:30:51 +0000 | [diff] [blame] | 31 | #include <signal.h> |
Eric Andersen | 50d6360 | 1999-11-09 01:47:36 +0000 | [diff] [blame] | 32 | #include <sys/ioctl.h> |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 33 | |
Eric Andersen | d73dc5b | 1999-11-10 23:13:02 +0000 | [diff] [blame] | 34 | static const char more_usage[] = "more [file ...]\n"; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 35 | |
Eric Andersen | 50d6360 | 1999-11-09 01:47:36 +0000 | [diff] [blame] | 36 | #ifdef BB_FEATURE_USE_TERMIOS |
Eric Andersen | f5a3838 | 1999-10-19 22:26:25 +0000 | [diff] [blame] | 37 | |
Erik Andersen | a6c7522 | 2000-04-18 00:00:52 +0000 | [diff] [blame] | 38 | #include <termio.h> |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 39 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 40 | FILE *cin; |
Erik Andersen | a6c7522 | 2000-04-18 00:00:52 +0000 | [diff] [blame] | 41 | /* sparc and other have broken termios support: use old termio handling. */ |
| 42 | struct termio initial_settings, new_settings; |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 43 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 44 | void gotsig(int sig) |
| 45 | { |
Erik Andersen | a6c7522 | 2000-04-18 00:00:52 +0000 | [diff] [blame] | 46 | ioctl(fileno(cin), TCSETAF, &initial_settings); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 47 | fprintf(stdout, "\n"); |
| 48 | exit(TRUE); |
| 49 | } |
Eric Andersen | 3cf52d1 | 1999-10-12 22:26:06 +0000 | [diff] [blame] | 50 | #endif |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 51 | |
Eric Andersen | 50d6360 | 1999-11-09 01:47:36 +0000 | [diff] [blame] | 52 | |
| 53 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 54 | #define TERMINAL_WIDTH 79 /* not 80 in case terminal has linefold bug */ |
Eric Andersen | 50d6360 | 1999-11-09 01:47:36 +0000 | [diff] [blame] | 55 | #define TERMINAL_HEIGHT 24 |
| 56 | |
| 57 | |
Eric Andersen | 96bcfd3 | 1999-11-12 01:30:18 +0000 | [diff] [blame] | 58 | #if defined BB_FEATURE_AUTOWIDTH |
Eric Andersen | 50d6360 | 1999-11-09 01:47:36 +0000 | [diff] [blame] | 59 | static int terminal_width = 0, terminal_height = 0; |
| 60 | #else |
| 61 | #define terminal_width TERMINAL_WIDTH |
| 62 | #define terminal_height TERMINAL_HEIGHT |
| 63 | #endif |
| 64 | |
| 65 | |
| 66 | |
Eric Andersen | 4bea32a | 1999-10-06 00:30:51 +0000 | [diff] [blame] | 67 | extern int more_main(int argc, char **argv) |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 68 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 69 | int c, lines = 0, input = 0; |
| 70 | int next_page = 0; |
| 71 | struct stat st; |
| 72 | FILE *file; |
| 73 | |
Eric Andersen | 50d6360 | 1999-11-09 01:47:36 +0000 | [diff] [blame] | 74 | #ifdef BB_FEATURE_AUTOWIDTH |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 75 | struct winsize win = { 0, 0 }; |
Eric Andersen | 50d6360 | 1999-11-09 01:47:36 +0000 | [diff] [blame] | 76 | #endif |
Eric Andersen | 4bea32a | 1999-10-06 00:30:51 +0000 | [diff] [blame] | 77 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 78 | argc--; |
Eric Andersen | 4bea32a | 1999-10-06 00:30:51 +0000 | [diff] [blame] | 79 | argv++; |
Eric Andersen | 4bea32a | 1999-10-06 00:30:51 +0000 | [diff] [blame] | 80 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 81 | if (argc > 0 |
| 82 | && (strcmp(*argv, "--help") == 0 || strcmp(*argv, "-h") == 0)) { |
| 83 | usage(more_usage); |
| 84 | } |
| 85 | do { |
| 86 | if (argc == 0) { |
| 87 | file = stdin; |
| 88 | } else |
| 89 | file = fopen(*argv, "r"); |
| 90 | |
| 91 | if (file == NULL) { |
| 92 | perror(*argv); |
| 93 | exit(FALSE); |
| 94 | } |
| 95 | fstat(fileno(file), &st); |
| 96 | |
| 97 | #ifdef BB_FEATURE_USE_TERMIOS |
| 98 | cin = fopen("/dev/tty", "r"); |
| 99 | if (!cin) |
| 100 | cin = fopen("/dev/console", "r"); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 101 | ioctl(fileno(cin), TCGETA, &initial_settings); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 102 | new_settings = initial_settings; |
| 103 | new_settings.c_lflag &= ~ICANON; |
| 104 | new_settings.c_lflag &= ~ECHO; |
Erik Andersen | a6c7522 | 2000-04-18 00:00:52 +0000 | [diff] [blame] | 105 | ioctl(fileno(cin), TCSETAF, &new_settings); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 106 | |
| 107 | #ifdef BB_FEATURE_AUTOWIDTH |
| 108 | ioctl(fileno(stdout), TIOCGWINSZ, &win); |
| 109 | if (win.ws_row > 4) |
| 110 | terminal_height = win.ws_row - 2; |
| 111 | if (win.ws_col > 0) |
| 112 | terminal_width = win.ws_col - 1; |
| 113 | #endif |
| 114 | |
| 115 | (void) signal(SIGINT, gotsig); |
| 116 | (void) signal(SIGQUIT, gotsig); |
| 117 | (void) signal(SIGTERM, gotsig); |
| 118 | |
| 119 | #endif |
| 120 | while ((c = getc(file)) != EOF) { |
| 121 | if (next_page) { |
| 122 | int len = 0; |
| 123 | |
| 124 | next_page = 0; |
| 125 | lines = 0; |
| 126 | len = fprintf(stdout, "--More-- "); |
| 127 | if (file != stdin) { |
| 128 | len += fprintf(stdout, "(%d%% of %ld bytes)", |
| 129 | (int) (100 * |
| 130 | ((double) ftell(file) / |
| 131 | (double) st.st_size)), |
| 132 | st.st_size); |
| 133 | } |
| 134 | len += fprintf(stdout, "%s", |
| 135 | #ifdef BB_FEATURE_USE_TERMIOS |
| 136 | "" |
| 137 | #else |
| 138 | "\n" |
| 139 | #endif |
| 140 | ); |
| 141 | |
| 142 | fflush(stdout); |
| 143 | input = getc(cin); |
| 144 | |
| 145 | #ifdef BB_FEATURE_USE_TERMIOS |
| 146 | /* Erase the "More" message */ |
| 147 | while (--len >= 0) |
| 148 | putc('\b', stdout); |
| 149 | while (++len <= terminal_width) |
| 150 | putc(' ', stdout); |
| 151 | while (--len >= 0) |
| 152 | putc('\b', stdout); |
| 153 | fflush(stdout); |
| 154 | #endif |
| 155 | |
| 156 | } |
| 157 | if (c == '\n') { |
| 158 | switch (input) { |
| 159 | case 'q': |
| 160 | goto end; |
| 161 | case '\n': |
| 162 | /* increment by just one line if we are at |
| 163 | * the end of this line*/ |
| 164 | next_page = 1; |
| 165 | break; |
| 166 | } |
| 167 | if (++lines == terminal_height) |
| 168 | next_page = 1; |
| 169 | } |
| 170 | putc(c, stdout); |
| 171 | } |
| 172 | fclose(file); |
| 173 | fflush(stdout); |
| 174 | |
| 175 | argv++; |
| 176 | } while (--argc > 0); |
| 177 | end: |
| 178 | #ifdef BB_FEATURE_USE_TERMIOS |
| 179 | gotsig(0); |
| 180 | #endif |
| 181 | exit(TRUE); |
| 182 | } |