/*
* Mini more implementation for busybox
*
- *
* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * Latest version blended together by Erik Andersen <andersen@lineo.com>,
- * based on the original more implementation by Bruce, and code from the
+ * Latest version blended together by Erik Andersen <andersen@codepoet.org>,
+ * 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
+ * Termios corrects by Vladimir Oleynik <dzo@simtreas.ru>
*
+ * Licensed under GPLv2 or later, see file License in this tarball for details.
*/
-#include <stdio.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <stdlib.h>
-#include <sys/ioctl.h>
#include "busybox.h"
-#define BB_DECLARE_EXTERN
-#define bb_need_help
-#include "messages.c"
-
-/* ED: sparc termios is broken: revert back to old termio handling. */
-#ifdef BB_FEATURE_USE_TERMIOS
-# if #cpu(sparc)
-# include <termio.h>
-# define termios termio
-# define setTermSettings(fd,argp) ioctl(fd,TCSETAF,argp)
-# define getTermSettings(fd,argp) ioctl(fd,TCGETA,argp)
-# else
-# include <termios.h>
-# define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
-# define getTermSettings(fd,argp) tcgetattr(fd, argp);
-# endif
-
-static FILE *cin;
+
+
+#ifdef CONFIG_FEATURE_USE_TERMIOS
+static int cin_fileno;
+#include <termios.h>
+#define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
+#define getTermSettings(fd,argp) tcgetattr(fd, argp);
static struct termios initial_settings, new_settings;
+static void set_tty_to_initial_mode(void)
+{
+ setTermSettings(cin_fileno, &initial_settings);
+}
+
static void gotsig(int sig)
{
- setTermSettings(fileno(cin), &initial_settings);
putchar('\n');
exit(EXIT_FAILURE);
}
-#endif /* BB_FEATURE_USE_TERMIOS */
-
+#endif /* CONFIG_FEATURE_USE_TERMIOS */
-static int terminal_width = 79; /* not 80 in case terminal has linefold bug */
-static int terminal_height = 24;
-
-extern int more_main(int argc, char **argv)
+int more_main(int argc, char **argv)
{
int c, lines, input = 0;
- int please_display_more_prompt;
+ int please_display_more_prompt = 0;
struct stat st;
FILE *file;
+ FILE *cin;
int len, page_height;
-
-#if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS
- struct winsize win = { 0, 0, 0, 0 };
-#endif
+ int terminal_width;
+ int terminal_height;
argc--;
argv++;
- do {
- if (argc == 0) {
- file = stdin;
- } else
- file = xfopen(*argv, "r");
- fstat(fileno(file), &st);
-
-#ifdef BB_FEATURE_USE_TERMIOS
- cin = fopen("/dev/tty", "r");
+ /* not use inputing from terminal if usage: more > outfile */
+ if(isatty(STDOUT_FILENO)) {
+ cin = fopen(CURRENT_TTY, "r");
if (!cin)
- cin = xfopen("/dev/console", "r");
- getTermSettings(fileno(cin), &initial_settings);
+ cin = xfopen(CONSOLE_DEV, "r");
+ please_display_more_prompt = 2;
+#ifdef CONFIG_FEATURE_USE_TERMIOS
+ cin_fileno = fileno(cin);
+ getTermSettings(cin_fileno, &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
-
+ new_settings.c_cc[VMIN] = 1;
+ new_settings.c_cc[VTIME] = 0;
+ setTermSettings(cin_fileno, &new_settings);
+ atexit(set_tty_to_initial_mode);
(void) signal(SIGINT, gotsig);
(void) signal(SIGQUIT, gotsig);
(void) signal(SIGTERM, gotsig);
-
#endif
+ } else {
+ cin = stdin;
+ }
+
+ do {
+ if (argc == 0) {
+ file = stdin;
+ } else
+ file = fopen_or_warn(*argv, "r");
+ if(file==0)
+ goto loop;
+
+ st.st_size = 0;
+ fstat(fileno(file), &st);
+
+ please_display_more_prompt &= ~1;
+
+ get_terminal_width_height(fileno(cin), &terminal_width, &terminal_height);
+ if (terminal_height > 4)
+ terminal_height -= 2;
+ if (terminal_width > 0)
+ terminal_width -= 1;
+
len=0;
lines = 0;
page_height = terminal_height;
- please_display_more_prompt = 0;
while ((c = getc(file)) != EOF) {
- if (please_display_more_prompt) {
+ if ((please_display_more_prompt & 3) == 3) {
len = printf("--More-- ");
- if (file != stdin) {
+ if (file != stdin && st.st_size > 0) {
#if _FILE_OFFSET_BITS == 64
len += printf("(%d%% of %lld bytes)",
(int) (100 * ((double) ftell(file) /
(double) st.st_size)), (long)st.st_size);
#endif
}
- len += printf("%s",
-#ifdef BB_FEATURE_USE_TERMIOS
- ""
-#else
- "\n"
-#endif
- );
fflush(stdout);
* We've just displayed the "--More--" prompt, so now we need
* to get input from the user.
*/
-#ifdef BB_FEATURE_USE_TERMIOS
input = getc(cin);
-#else
- input = getc(stdin);
+#ifndef CONFIG_FEATURE_USE_TERMIOS
+ printf("\033[A"); /* up cursor */
#endif
-
-#ifdef BB_FEATURE_USE_TERMIOS
/* Erase the "More" message */
putc('\r', stdout);
while (--len >= 0)
putc(' ', stdout);
putc('\r', stdout);
- fflush(stdout);
-#endif
len=0;
lines = 0;
page_height = terminal_height;
- please_display_more_prompt = 0;
+ please_display_more_prompt &= ~1;
if (input == 'q')
goto end;
}
- /*
+ /*
* There are two input streams to worry about here:
*
* c : the character we are reading from the file being "mored"
/* increment by just one line if we are at
* the end of this line */
if (input == '\n')
- please_display_more_prompt = 1;
+ please_display_more_prompt |= 1;
/* Adjust the terminal height for any overlap, so that
* no lines get lost off the top. */
if (len >= terminal_width) {
- div_t result = div( len, terminal_width);
- if (result.quot) {
- if (result.rem)
- page_height-=result.quot;
+ int quot, rem;
+ quot = len / terminal_width;
+ rem = len - (quot * terminal_width);
+ if (quot) {
+ if (rem)
+ page_height-=quot;
else
- page_height-=(result.quot-1);
+ page_height-=(quot-1);
}
}
if (++lines >= page_height) {
- please_display_more_prompt = 1;
+ please_display_more_prompt |= 1;
}
len=0;
}
}
fclose(file);
fflush(stdout);
-
+loop:
argv++;
} while (--argc > 0);
end:
-#ifdef BB_FEATURE_USE_TERMIOS
- setTermSettings(fileno(cin), &initial_settings);
-#endif
return 0;
}
projects / oweals / busybox.git / blobdiff