+/* vi: set sw=4 ts=4: */
/*
* 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
*
*/
-
-/* Turning this off makes things a bit smaller (and less pretty) */
-#define BB_FEATURE_USE_TERMIOS
-/* Turning this off makes things a bit smaller (and less pretty) */
-#define BB_FEATURE_AUTOWIDTH
-
-
-
-#include "internal.h"
#include <stdio.h>
#include <fcntl.h>
#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
#include <sys/ioctl.h>
+#include "busybox.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
+#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);
-#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
+static struct termios initial_settings, new_settings;
- 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
+static void set_tty_to_initial_mode(void)
+{
+ setTermSettings(cin_fileno, &initial_settings);
+}
+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;
- struct stat st;
- FILE *file;
-#ifdef BB_FEATURE_AUTOWIDTH
- struct winsize win = {0,0};
+ int c, lines, input = 0;
+ int please_display_more_prompt = 0;
+ struct stat st;
+ FILE *file;
+ FILE *cin;
+ int len, page_height;
+ int terminal_width;
+ int terminal_height;
+#ifndef CONFIG_FEATURE_USE_TERMIOS
+ int cin_fileno;
#endif
- argc--;
- argv++;
+ 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);
+ /* 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;
}
- 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);
+
+ do {
+ if (argc == 0) {
+ file = stdin;
+ } else
+ file = bb_wfopen(*argv, "r");
+ if(file==0)
+ goto loop;
+
+ st.st_size = 0;
+ fstat(fileno(file), &st);
+
+ please_display_more_prompt &= ~1;
+
+ get_terminal_width_height(cin_fileno, &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;
+ while ((c = getc(file)) != EOF) {
+
+ 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
- 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(STDOUT_FILENO, TIOCGWINSZ, &win);
- if (win.ws_row > 4)
- terminal_height = win.ws_row - 2;
- if (win.ws_col > 0)
- terminal_width = win.ws_col - 1;
+ len += printf("(%d%% of %ld bytes)",
+ (int) (100 * ((double) ftell(file) /
+ (double) st.st_size)), (long)st.st_size);
#endif
+ }
- (void) signal(SIGINT, gotsig);
- (void) signal(SIGQUIT, gotsig);
- (void) signal(SIGTERM, gotsig);
+ fflush(stdout);
+ /*
+ * We've just displayed the "--More--" prompt, so now we need
+ * to get input from the user.
+ */
+ input = getc(cin);
+#ifndef CONFIG_FEATURE_USE_TERMIOS
+ printf("\033[A"); /* up cursor */
#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);
+ /* Erase the "More" message */
+ putc('\r', stdout);
+ while (--len >= 0)
+ putc(' ', stdout);
+ 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') {
+ /* 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 >= 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++;
}
- 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);
+ fclose(file);
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);
+loop:
+ argv++;
+ } while (--argc > 0);
+ end:
+ return 0;
}
-
projects / oweals / busybox.git / blobdiff