/*
* 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.
*
+ * Termios corrects by Vladimir Oleynik <dzo@simtreas.ru>
+ *
* 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
*
*/
-#include "internal.h"
#include <stdio.h>
#include <fcntl.h>
#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
#include <sys/ioctl.h>
-#define BB_DECLARE_EXTERN
-#define bb_need_help
-#include "messages.c"
-
-static const char more_usage[] = "more [FILE ...]\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
- "\nMore is a filter for viewing FILE one screenful at a time.\n"
-#endif
- ;
+#include "busybox.h"
-/* 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
+#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);
-FILE *cin;
+static struct termios initial_settings, new_settings;
-struct termios initial_settings, new_settings;
-
-void gotsig(int sig)
+static void set_tty_to_initial_mode(void)
{
- setTermSettings(fileno(cin), &initial_settings);
- fprintf(stdout, "\n");
- exit(TRUE);
+ setTermSettings(cin_fileno, &initial_settings);
}
-#endif
-
-
-
-#define TERMINAL_WIDTH 79 /* not 80 in case terminal has linefold bug */
-#define TERMINAL_HEIGHT 24
-
-
-#if defined BB_FEATURE_AUTOWIDTH
-#ifdef BB_FEATURE_USE_TERMIOS
-static int terminal_width = TERMINAL_WIDTH;
-#endif
-static int terminal_height = TERMINAL_HEIGHT;
-#else
-#define terminal_width TERMINAL_WIDTH
-#define terminal_height TERMINAL_HEIGHT
-#endif
+static void gotsig(int sig)
+{
+ putchar('\n');
+ exit(EXIT_FAILURE);
+}
+#endif /* CONFIG_FEATURE_USE_TERMIOS */
extern int more_main(int argc, char **argv)
{
- int c, lines = 0, input = 0;
- int next_page = 0;
+ int c, lines, input = 0;
+ int please_display_more_prompt = 0;
struct stat st;
FILE *file;
-
-#if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS
- struct winsize win = { 0, 0 };
+ FILE *cin;
+ int len, page_height;
+ int terminal_width;
+ int terminal_height;
+#ifndef CONFIG_FEATURE_USE_TERMIOS
+ int cin_fileno;
#endif
argc--;
argv++;
- if (argc > 0
- && (strcmp(*argv, dash_dash_help) == 0 || strcmp(*argv, "-h") == 0)) {
- usage(more_usage);
+
+ /* not use inputing from terminal if usage: more > outfile */
+ if(isatty(fileno(stdout))) {
+ cin = fopen(CURRENT_TTY, "r");
+ if (!cin)
+ cin = bb_xfopen(CONSOLE_DEV, "r");
+ cin_fileno = fileno(cin);
+ please_display_more_prompt = 2;
+#ifdef CONFIG_FEATURE_USE_TERMIOS
+ getTermSettings(cin_fileno, &initial_settings);
+ new_settings = initial_settings;
+ new_settings.c_lflag &= ~ICANON;
+ new_settings.c_lflag &= ~ECHO;
+ 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(*argv, "r");
+ file = bb_wfopen(*argv, "r");
+ if(file==0)
+ goto loop;
- if (file == NULL) {
- perror(*argv);
- exit(FALSE);
- }
+ st.st_size = 0;
fstat(fileno(file), &st);
-#ifdef BB_FEATURE_USE_TERMIOS
- cin = fopen("/dev/tty", "r");
- if (!cin)
- cin = fopen("/dev/console", "r");
- getTermSettings(fileno(cin), &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
+ please_display_more_prompt &= ~1;
- (void) signal(SIGINT, gotsig);
- (void) signal(SIGQUIT, gotsig);
- (void) signal(SIGTERM, gotsig);
+ get_terminal_width_height(cin_fileno, &terminal_width, &terminal_height);
+ if (terminal_height > 4)
+ terminal_height -= 2;
+ if (terminal_width > 0)
+ terminal_width -= 1;
-#endif
+ len=0;
+ lines = 0;
+ page_height = terminal_height;
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
- ""
+ if ((please_display_more_prompt & 3) == 3) {
+ len = printf("--More-- ");
+ 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 long)st.st_size);
#else
- "\n"
+ len += printf("(%d%% of %ld bytes)",
+ (int) (100 * ((double) ftell(file) /
+ (double) st.st_size)), (long)st.st_size);
#endif
- );
+ }
fflush(stdout);
-#ifdef BB_FEATURE_USE_TERMIOS
+
+ /*
+ * We've just displayed the "--More--" prompt, so now we need
+ * to get input from the user.
+ */
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('\b', stdout);
- while (++len <= terminal_width)
putc(' ', stdout);
- while (--len >= 0)
- putc('\b', stdout);
- fflush(stdout);
-#endif
+ putc('\r', stdout);
+ len=0;
+ lines = 0;
+ page_height = terminal_height;
+ 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"
+ * input : a character received from the keyboard
+ *
+ * If we hit a newline in the _file_ stream, we want to test and
+ * see if any characters have been hit in the _input_ stream. This
+ * allows the user to quit while in the middle of a file.
+ */
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;
+ /* increment by just one line if we are at
+ * the end of this line */
+ if (input == '\n')
+ 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) {
+ int quot, rem;
+ quot = len / terminal_width;
+ rem = len - (quot * terminal_width);
+ if (quot) {
+ if (rem)
+ page_height-=quot;
+ else
+ page_height-=(quot-1);
+ }
}
- if (++lines == terminal_height)
- next_page = 1;
+ if (++lines >= page_height) {
+ please_display_more_prompt |= 1;
+ }
+ len=0;
}
+ /*
+ * If we just read a newline from the file being 'mored' and any
+ * key other than a return is hit, scroll by one page
+ */
putc(c, stdout);
+ len++;
}
fclose(file);
fflush(stdout);
-
+loop:
argv++;
} while (--argc > 0);
end:
-#ifdef BB_FEATURE_USE_TERMIOS
- gotsig(0);
-#endif
- exit(TRUE);
+ return 0;
}
projects / oweals / busybox.git / blobdiff