164 lines
3.5 KiB
C
164 lines
3.5 KiB
C
/*
|
|
* Mini more implementation for busybox
|
|
*
|
|
*
|
|
* Copyright (C) 1999 by Lineo, inc.
|
|
* Blended by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
|
|
* based on the original more implementation 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
|
|
*
|
|
*/
|
|
|
|
|
|
/* Turning this off makes things a bit smaller (and less pretty) */
|
|
#define BB_MORE_TERM
|
|
|
|
|
|
|
|
#include "internal.h"
|
|
#include <stdio.h>
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
|
|
|
|
static const char more_usage[] = "[file ...]";
|
|
|
|
|
|
/* ED: sparc termios is broken: revert back to old termio handling. */
|
|
#ifdef BB_MORE_TERM
|
|
|
|
#if #cpu(sparc)
|
|
# define USE_OLD_TERMIO
|
|
# include <termio.h>
|
|
# include <sys/ioctl.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);
|
|
exit( TRUE);
|
|
}
|
|
#endif
|
|
|
|
extern int more_main(int argc, char **argv)
|
|
{
|
|
int c, lines=0, input=0;
|
|
int next_page=0;
|
|
struct stat st;
|
|
FILE *file;
|
|
|
|
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_MORE_TERM
|
|
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);
|
|
|
|
(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_MORE_TERM
|
|
""
|
|
#else
|
|
"\n"
|
|
#endif
|
|
);
|
|
|
|
fflush(stdout);
|
|
input = getc( cin);
|
|
|
|
#ifdef BB_MORE_TERM
|
|
/* Erase the "More" message */
|
|
while(len-- > 0)
|
|
putc('\b', stdout);
|
|
while(len++ < 79)
|
|
putc(' ', stdout);
|
|
while(len-- > 0)
|
|
putc('\b', stdout);
|
|
fflush(stdout);
|
|
#endif
|
|
|
|
}
|
|
if (input=='q')
|
|
goto end;
|
|
if (input=='\n' && c == '\n' )
|
|
next_page = 1;
|
|
if ( c == ' ' && ++lines == 24 )
|
|
next_page = 1;
|
|
putc(c, stdout);
|
|
}
|
|
fclose(file);
|
|
fflush(stdout);
|
|
|
|
argv++;
|
|
} while (--argc > 0);
|
|
end:
|
|
#ifdef BB_MORE_TERM
|
|
gotsig(0);
|
|
#endif
|
|
exit(TRUE);
|
|
}
|
|
|