X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=more.c;h=974149177ad19372fdc68d45f991471115807f2a;hb=36fe1a30b1958351de2b8065cb19d3d1b8ed1b33;hp=6ac553e6baec2acf03510afe3c591fa0455fe9ca;hpb=9d3aba7b37b275350a9fe0887871da9ba73dcbd7;p=oweals%2Fbusybox.git diff --git a/more.c b/more.c index 6ac553e6b..974149177 100644 --- a/more.c +++ b/more.c @@ -1,7 +1,13 @@ +/* vi: set sw=4 ts=4: */ /* * Mini more implementation for busybox * - * Copyright (C) 1998 by Erik Andersen + * + * Copyright (C) 1995, 1996 by Bruce Perens . + * + * Latest version blended together by Erik Andersen , + * 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 @@ -21,70 +27,182 @@ #include "internal.h" #include +#include #include +#include +#define BB_DECLARE_EXTERN +#define bb_need_help +#include "messages.c" + +static const char more_usage[] = "more [FILE ...]\n" +#ifndef BB_FEATURE_TRIVIAL_HELP + "\nMore is a filter for viewing FILE one screenful at a time.\n" +#endif + ; -const char more_usage[] = "[file ...]"; +/* ED: sparc termios is broken: revert back to old termio handling. */ +#ifdef BB_FEATURE_USE_TERMIOS -//#define ERASE_STUFF +#if #cpu(sparc) +# include +# define termios termio +# define setTermSettings(fd,argp) ioctl(fd,TCSETAF,argp) +# define getTermSettings(fd,argp) ioctl(fd,TCGETA,argp) +#else +# include +# define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp) +# define getTermSettings(fd,argp) tcgetattr(fd, argp); +#endif -extern int more_main(int argc, char **argv) +FILE *cin; + +struct termios initial_settings, new_settings; + +void gotsig(int sig) { - int c, lines=0; - int next_page=0, rows = 24; -#ifdef ERASE_STUFF - int cols=79; + setTermSettings(fileno(cin), &initial_settings); + fprintf(stdout, "\n"); + exit(TRUE); +} #endif - struct stat st; - FILE *file = stdin; - - if ( strcmp(*argv,"--help")==0 || strcmp(*argv,"-h")==0 ) { - fprintf(stderr, "Usage: %s %s", *argv, more_usage); - return(FALSE); - } - argc--; - argv++; - - while (argc-- > 0) { - file = fopen(*argv, "r"); - if (file == NULL) { - perror("Can't open file"); - return(FALSE); - } - fstat(fileno(file), &st); - fprintf(stderr, "hi\n"); - - while ((c = getc(file)) != EOF) { - if ( next_page ) { - int len=0; - next_page = 0; - lines=0; - len = fprintf(stdout, "--More-- (%d%% of %ld bytes)", - (int) (100*( (double) ftell(file) / (double) st.st_size )), - st.st_size); - fflush(stdout); - getc( stdin); -#ifdef ERASE_STUFF - /* Try to erase the "More" message */ - while(len-- > 0) - putc('\b', stdout); - while(len++ < cols) - putc(' ', stdout); - while(len-- > 0) - putc('\b', stdout); - fflush(stdout); + + + +#define TERMINAL_WIDTH 79 /* not 80 in case terminal has linefold bug */ +#define TERMINAL_HEIGHT 24 + + +#if defined BB_FEATURE_AUTOWIDTH +#ifdef BB_FEATURE_USE_TERMIOS +static int terminal_width = TERMINAL_WIDTH; +#endif +static int terminal_height = TERMINAL_HEIGHT; +#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; + +#if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS + struct winsize win = { 0, 0 }; #endif - } - if ( c == '\n' && ++lines == (rows + 1) ) - next_page = 1; - putc(c, stdout); - } - fclose(file); - fflush(stdout); argc--; argv++; - } - return(TRUE); -} + if (argc > 0 + && (strcmp(*argv, dash_dash_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"); + getTermSettings(fileno(cin), &initial_settings); + new_settings = initial_settings; + new_settings.c_cc[VMIN] = 1; + new_settings.c_cc[VTIME] = 0; + new_settings.c_lflag &= ~ICANON; + new_settings.c_lflag &= ~ECHO; + setTermSettings(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); +#ifdef BB_FEATURE_USE_TERMIOS + input = getc(cin); +#else + input = getc(stdin); +#endif + +#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); +}