X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=more.c;h=821427dda35b206a89c7f5b6f9ef7fbb3e56fc7b;hb=3695052813a0c9af6b891387e688fc07e4761c99;hp=65409999b09d8aba7f1813773cb1ba9d13b18b2f;hpb=cc8ed39b240180b58810784f844e253263594ac3;p=oweals%2Fbusybox.git diff --git a/more.c b/more.c index 65409999b..821427dda 100644 --- a/more.c +++ b/more.c @@ -1,110 +1,189 @@ +/* + * Mini more implementation for busybox + * + * + * 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 + * 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 -#include -#include -#include #include +#include +#include + +static const char more_usage[] = "more [file ...]\n"; -#define BB_MORE_TERM +/* ED: sparc termios is broken: revert back to old termio handling. */ +#ifdef BB_FEATURE_USE_TERMIOS -#ifdef BB_MORE_TERM - #include - #include +#if #cpu(sparc) +# define USE_OLD_TERMIO +# include +# define termios termio +# define stty(fd,argp) ioctl(fd,TCSETAF,argp) +#else +# include +# define stty(fd,argp) tcsetattr(fd,TCSANOW,argp) +#endif - FILE *cin; - struct termios initial_settings, new_settings; + FILE *cin; + struct termios initial_settings, new_settings; - void gotsig(int sig) { - tcsetattr(fileno(cin), TCSANOW, &initial_settings); - exit(0); - } + void gotsig(int sig) { + stty(fileno(cin), &initial_settings); + fprintf(stdout, "\n"); + exit( TRUE); + } #endif -const char more_usage[] = "more [file]\n" -"\n" -"\tDisplays a file, one page at a time.\n" -"\tIf there are no arguments, the standard input is displayed.\n"; -extern int -more_fn(const struct FileInfo * i) + +#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) { - FILE * f = stdin; - int c; - int lines = 0, tlines = 0; - int next_page = 0; - int rows = 24, cols = 79; -#ifdef BB_MORE_TERM - long sizeb = 0; - struct stat st; - struct winsize win; + 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 - - if ( i ) { - if (! (f = fopen(i->source, "r") )) { - name_and_error(i->source); - return 1; - } - fstat(fileno(f), &st); - sizeb = st.st_size / 100; + + 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); } - -#ifdef BB_MORE_TERM + 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; - tcsetattr(fileno(cin), TCSANOW, &new_settings); - + 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); - ioctl(STDOUT_FILENO, TIOCGWINSZ, &win); - if (win.ws_row > 4) rows = win.ws_row - 2; - if (win.ws_col > 0) cols = win.ws_col - 1; +#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 - while ( (c = getc(f)) != EOF ) { - if ( next_page ) { - char garbage; - int len; - tlines += lines; - lines = 0; - next_page = 0; //Percentage is based on bytes, not lines. - if ( i && i->source ) //It is not very acurate, but still useful. - len = printf("%s - %%%2ld - line: %d", i->source, (ftell(f) - sizeb - sizeb) / sizeb, tlines); - else - len = printf("line: %d", tlines); - - fflush(stdout); -#ifndef BB_MORE_TERM - read(2, &garbage, 1); -#else - do { - fread(&garbage, 1, 1, cin); - } while ((garbage != ' ') && (garbage != '\n')); - - if (garbage == '\n') { - lines = rows; - tlines -= rows; - } - garbage = 0; - //clear line, since tabs don't overwrite. - while(len-- > 0) putchar('\b'); - while(len++ < cols) putchar(' '); - while(len-- > 0) putchar('\b'); - fflush(stdout); -#endif - } - putchar(c); - if ( c == '\n' && ++lines == (rows + 1) ) + } + 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); } - if ( f != stdin ) - fclose(f); -#ifdef BB_MORE_TERM - gotsig(0); + fclose(file); + fflush(stdout); + + argv++; + } while (--argc > 0); +end: +#ifdef BB_FEATURE_USE_TERMIOS + gotsig(0); #endif - return 0; + exit(TRUE); } +