159 lines
3.3 KiB
C
159 lines
3.3 KiB
C
/*
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* Mini more implementation for busybox
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*
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* Copyright (C) 1998 by Erik Andersen <andersee@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/* Turning this off makes things a bit smaller (and less pretty) */
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#define BB_MORE_TERM
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#include "internal.h"
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#include <stdio.h>
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#include <fcntl.h>
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#include <signal.h>
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static const char more_usage[] = "[file ...]";
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/* ED: sparc termios is broken: revert back to old termio handling. */
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#ifdef BB_MORE_TERM
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#if defined (__sparc__)
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# define USE_OLD_TERMIO
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# include <termio.h>
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# include <sys/ioctl.h>
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# define termios termio
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# define stty(fd,argp) ioctl(fd,TCSETAF,argp)
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#else
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# include <termios.h>
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# define stty(fd,argp) tcsetattr(fd,TCSANOW,argp)
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#endif
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FILE *cin;
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struct termios initial_settings, new_settings;
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void gotsig(int sig) {
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stty(fileno(cin), &initial_settings);
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exit( TRUE);
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}
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#endif
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extern int more_main(int argc, char **argv)
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{
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int c, lines=0, input=0;
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int next_page=0;
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struct stat st;
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FILE *file;
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if ( strcmp(*argv,"--help")==0 || strcmp(*argv,"-h")==0 ) {
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usage (more_usage);
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}
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argc--;
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argv++;
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while (argc >= 0) {
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if (argc==0) {
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file = stdin;
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}
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else
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file = fopen(*argv, "r");
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if (file == NULL) {
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perror("Can't open file");
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exit(FALSE);
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}
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fstat(fileno(file), &st);
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#ifdef BB_MORE_TERM
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cin = fopen("/dev/tty", "r");
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if (!cin)
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cin = fopen("/dev/console", "r");
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#ifdef USE_OLD_TERMIO
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ioctl(fileno(cin),TCGETA,&initial_settings);
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#else
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tcgetattr(fileno(cin),&initial_settings);
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#endif
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new_settings = initial_settings;
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new_settings.c_lflag &= ~ICANON;
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new_settings.c_lflag &= ~ECHO;
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stty(fileno(cin), &new_settings);
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(void) signal(SIGINT, gotsig);
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#endif
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while ((c = getc(file)) != EOF) {
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if ( next_page ) {
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int len=0;
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next_page = 0;
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lines=0;
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len = fprintf(stdout, "--More-- ");
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if (file != stdin) {
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len += fprintf(stdout, "(%d%% of %ld bytes)",
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(int) (100*( (double) ftell(file) / (double) st.st_size )),
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st.st_size);
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}
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len += fprintf(stdout, "%s",
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#ifdef BB_MORE_TERM
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""
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#else
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"\n"
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#endif
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);
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fflush(stdout);
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input = getc( cin);
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#ifdef BB_MORE_TERM
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/* Erase the "More" message */
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while(len-- > 0)
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putc('\b', stdout);
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while(len++ < 79)
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putc(' ', stdout);
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while(len-- > 0)
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putc('\b', stdout);
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fflush(stdout);
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#endif
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}
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if (input=='q')
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goto end;
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if (input==' ' && c == '\n' )
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next_page = 1;
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if ( c == '\n' && ++lines == 24 )
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next_page = 1;
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putc(c, stdout);
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}
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fclose(file);
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fflush(stdout);
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argc--;
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argv++;
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}
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end:
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#ifdef BB_MORE_TERM
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gotsig(0);
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#endif
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exit(TRUE);
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}
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