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/* 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.
*
* 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 <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(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);
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);
}
|
