diff options
Diffstat (limited to 'more.c')
| -rw-r--r-- | more.c | 217 |
1 files changed, 0 insertions, 217 deletions
@@ -1,217 +0,0 @@ -/* 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. - * - * Termios corrects by Vladimir Oleynik <vodz@usa.net> - * - * 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 <stdio.h> -#include <fcntl.h> -#include <signal.h> -#include <stdlib.h> -#include <unistd.h> -#include <sys/ioctl.h> -#include "busybox.h" - -static FILE *cin; - -#ifdef BB_FEATURE_USE_TERMIOS -#include <termios.h> -#define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp) -#define getTermSettings(fd,argp) tcgetattr(fd, argp); - -static struct termios initial_settings, new_settings; - -static void set_tty_to_initial_mode(void) -{ - setTermSettings(fileno(cin), &initial_settings); -} - -static void gotsig(int sig) -{ - putchar('\n'); - exit(EXIT_FAILURE); -} -#endif /* BB_FEATURE_USE_TERMIOS */ - - -static int terminal_width = 79; /* not 80 in case terminal has linefold bug */ -static int terminal_height = 24; - - -extern int more_main(int argc, char **argv) -{ - int c, lines, input = 0; - int please_display_more_prompt = -1; - struct stat st; - FILE *file; - int len, page_height; - -#if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS - struct winsize win = { 0, 0, 0, 0 }; -#endif - - argc--; - argv++; - - - /* not use inputing from terminal if usage: more > outfile */ - if(isatty(fileno(stdout))) { - cin = fopen(CURRENT_TTY, "r"); - if (!cin) - cin = xfopen(CONSOLE_DEV, "r"); - please_display_more_prompt = 0; -#ifdef BB_FEATURE_USE_TERMIOS - getTermSettings(fileno(cin), &initial_settings); - new_settings = initial_settings; - new_settings.c_lflag &= ~ICANON; - new_settings.c_lflag &= ~ECHO; -#ifndef linux - /* Hmm, in linux c_cc[] not parsed if set ~ICANON */ - new_settings.c_cc[VMIN] = 1; - new_settings.c_cc[VTIME] = 0; -#endif - setTermSettings(fileno(cin), &new_settings); - atexit(set_tty_to_initial_mode); - (void) signal(SIGINT, gotsig); - (void) signal(SIGQUIT, gotsig); - (void) signal(SIGTERM, gotsig); -#endif - } - - do { - if (argc == 0) { - file = stdin; - } else - file = wfopen(*argv, "r"); - if(file==0) - goto loop; - - fstat(fileno(file), &st); - - if(please_display_more_prompt>0) - please_display_more_prompt = 0; - -#if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS - 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 - len=0; - lines = 0; - page_height = terminal_height; - while ((c = getc(file)) != EOF) { - - if (please_display_more_prompt>0) { - len = printf("--More-- "); - if (file != stdin) { -#if _FILE_OFFSET_BITS == 64 - len += printf("(%d%% of %lld bytes)", - (int) (100 * ((double) ftell(file) / - (double) st.st_size)), (long long)st.st_size); -#else - len += printf("(%d%% of %ld bytes)", - (int) (100 * ((double) ftell(file) / - (double) st.st_size)), (long)st.st_size); -#endif - } - - fflush(stdout); - - /* - * We've just displayed the "--More--" prompt, so now we need - * to get input from the user. - */ - input = getc(cin); -#ifndef BB_FEATURE_USE_TERMIOS - printf("\033[A"); /* up cursor */ -#endif - /* Erase the "More" message */ - putc('\r', stdout); - while (--len >= 0) - putc(' ', stdout); - putc('\r', stdout); - fflush(stdout); - len=0; - lines = 0; - page_height = terminal_height; - please_display_more_prompt = 0; - - if (input == 'q') - goto end; - } - - /* - * There are two input streams to worry about here: - * - * c : the character we are reading from the file being "mored" - * input : a character received from the keyboard - * - * If we hit a newline in the _file_ stream, we want to test and - * see if any characters have been hit in the _input_ stream. This - * allows the user to quit while in the middle of a file. - */ - if (c == '\n') { - /* increment by just one line if we are at - * the end of this line */ - if (input == '\n') - if(please_display_more_prompt==0) - please_display_more_prompt = 1; - /* Adjust the terminal height for any overlap, so that - * no lines get lost off the top. */ - if (len >= terminal_width) { - int quot, rem; - quot = len / terminal_width; - rem = len - (quot * terminal_width); - if (quot) { - if (rem) - page_height-=quot; - else - page_height-=(quot-1); - } - } - if (++lines >= page_height) { - if(please_display_more_prompt==0) - please_display_more_prompt = 1; - } - len=0; - } - /* - * If we just read a newline from the file being 'mored' and any - * key other than a return is hit, scroll by one page - */ - putc(c, stdout); - len++; - } - fclose(file); - fflush(stdout); -loop: - argv++; - } while (--argc > 0); - end: - return 0; -} |