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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 | /* vi: set sw=4 ts=4: */ /* * Mini more implementation for busybox * * * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>. * * Latest version blended together by Erik Andersen <andersen@lineo.com>, * based on the original more implementation by Bruce, and code from the * Debian boot-floppies team. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include "internal.h" #include <stdio.h> #include <fcntl.h> #include <signal.h> #include <sys/ioctl.h> static const char more_usage[] = "more [file ...]\n"; /* ED: sparc termios is broken: revert back to old termio handling. */ #ifdef BB_FEATURE_USE_TERMIOS #if #cpu(sparc) # define USE_OLD_TERMIO # include <termio.h> # define termios termio # define stty(fd,argp) ioctl(fd,TCSETAF,argp) #else # include <termios.h> # define stty(fd,argp) tcsetattr(fd,TCSANOW,argp) #endif FILE *cin; struct termios initial_settings, new_settings; void gotsig(int sig) { stty(fileno(cin), &initial_settings); fprintf(stdout, "\n"); exit(TRUE); } #endif #define TERMINAL_WIDTH 79 /* not 80 in case terminal has linefold bug */ #define TERMINAL_HEIGHT 24 #if defined BB_FEATURE_AUTOWIDTH static int terminal_width = 0, terminal_height = 0; #else #define terminal_width TERMINAL_WIDTH #define terminal_height TERMINAL_HEIGHT #endif extern int more_main(int argc, char **argv) { int c, lines = 0, input = 0; int next_page = 0; struct stat st; FILE *file; #ifdef BB_FEATURE_AUTOWIDTH struct winsize win = { 0, 0 }; #endif argc--; argv++; if (argc > 0 && (strcmp(*argv, "--help") == 0 || strcmp(*argv, "-h") == 0)) { usage(more_usage); } do { if (argc == 0) { file = stdin; } else file = fopen(*argv, "r"); if (file == NULL) { perror(*argv); exit(FALSE); } fstat(fileno(file), &st); #ifdef BB_FEATURE_USE_TERMIOS cin = fopen("/dev/tty", "r"); if (!cin) cin = fopen("/dev/console", "r"); #ifdef USE_OLD_TERMIO ioctl(fileno(cin), TCGETA, &initial_settings); #else tcgetattr(fileno(cin), &initial_settings); #endif new_settings = initial_settings; new_settings.c_lflag &= ~ICANON; new_settings.c_lflag &= ~ECHO; stty(fileno(cin), &new_settings); #ifdef BB_FEATURE_AUTOWIDTH ioctl(fileno(stdout), TIOCGWINSZ, &win); if (win.ws_row > 4) terminal_height = win.ws_row - 2; if (win.ws_col > 0) terminal_width = win.ws_col - 1; #endif (void) signal(SIGINT, gotsig); (void) signal(SIGQUIT, gotsig); (void) signal(SIGTERM, gotsig); #endif while ((c = getc(file)) != EOF) { if (next_page) { int len = 0; next_page = 0; lines = 0; len = fprintf(stdout, "--More-- "); if (file != stdin) { len += fprintf(stdout, "(%d%% of %ld bytes)", (int) (100 * ((double) ftell(file) / (double) st.st_size)), st.st_size); } len += fprintf(stdout, "%s", #ifdef BB_FEATURE_USE_TERMIOS "" #else "\n" #endif ); fflush(stdout); input = getc(cin); #ifdef BB_FEATURE_USE_TERMIOS /* Erase the "More" message */ while (--len >= 0) putc('\b', stdout); while (++len <= terminal_width) putc(' ', stdout); while (--len >= 0) putc('\b', stdout); fflush(stdout); #endif } if (c == '\n') { switch (input) { case 'q': goto end; case '\n': /* increment by just one line if we are at * the end of this line*/ next_page = 1; break; } if (++lines == terminal_height) next_page = 1; } putc(c, stdout); } fclose(file); fflush(stdout); argv++; } while (--argc > 0); end: #ifdef BB_FEATURE_USE_TERMIOS gotsig(0); #endif exit(TRUE); } |