| /* |
| * 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 |
| * |
| */ |
| |
| |
| /* Turning this off makes things a bit smaller (and less pretty) */ |
| #define BB_FEATURE_USE_TERMIOS |
| /* Turning this off makes things a bit smaller (and less pretty) */ |
| #define BB_FEATURE_AUTOWIDTH |
| |
| |
| |
| #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(STDOUT_FILENO, 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); |
| } |
| |