-#include "internal.h"
+/* 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.
+ *
+ * Termios corrects by Vladimir Oleynik <vodz@usa.net>
+ *
+ * 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 <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
#include <fcntl.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include "busybox.h"
-#define BB_MORE_TERM
+static FILE *cin;
-#ifdef BB_MORE_TERM
- #include <termios.h>
- #include <signal.h>
+#ifdef BB_FEATURE_USE_TERMIOS
+#include <termios.h>
+#define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp)
+#define getTermSettings(fd,argp) tcgetattr(fd, argp);
- FILE *cin;
- struct termios initial_settings, new_settings;
+static struct termios initial_settings, new_settings;
- void gotsig(int sig) {
- tcsetattr(fileno(cin), TCSANOW, &initial_settings);
- exit(0);
- }
-#endif
+static void set_tty_to_initial_mode(void)
+{
+ setTermSettings(fileno(cin), &initial_settings);
+}
+
+static void gotsig(int sig)
+{
+ putchar('\n');
+ exit(EXIT_FAILURE);
+}
+#endif /* BB_FEATURE_USE_TERMIOS */
+
+
+static int terminal_width = 79; /* not 80 in case terminal has linefold bug */
+static int terminal_height = 24;
-const char more_usage[] = "more [file]\n"
-"\n"
-"\tDisplays a file, one page at a time.\n"
-"\tIf there are no arguments, the standard input is displayed.\n";
-extern int
-more_fn(const struct FileInfo * i)
+extern int more_main(int argc, char **argv)
{
- FILE * f = stdin;
- int c;
- int lines = 0, tlines = 0;
- int next_page = 0;
- int rows = 24, cols = 79;
-#ifdef BB_MORE_TERM
- long sizeb = 0;
- struct stat st;
- struct winsize win;
+ int c, lines, input = 0;
+ int please_display_more_prompt = -1;
+ struct stat st;
+ FILE *file;
+ int len, page_height;
+
+#if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS
+ struct winsize win = { 0, 0, 0, 0 };
#endif
-
- if ( i ) {
- if (! (f = fopen(i->source, "r") )) {
- name_and_error(i->source);
- return 1;
- }
- fstat(fileno(f), &st);
- sizeb = st.st_size / 100;
- }
-
-#ifdef BB_MORE_TERM
- cin = fopen("/dev/tty", "r");
- tcgetattr(fileno(cin),&initial_settings);
- new_settings = initial_settings;
- new_settings.c_lflag &= ~ICANON;
- new_settings.c_lflag &= ~ECHO;
- tcsetattr(fileno(cin), TCSANOW, &new_settings);
-
- (void) signal(SIGINT, gotsig);
-
- ioctl(STDOUT_FILENO, TIOCGWINSZ, &win);
- if (win.ws_row > 4) rows = win.ws_row - 2;
- if (win.ws_col > 0) cols = win.ws_col - 1;
+ argc--;
+ argv++;
+
+ /* not use inputing from terminal if usage: more > outfile */
+ if(isatty(fileno(stdout))) {
+ cin = fopen(CURRENT_TTY, "r");
+ if (!cin)
+ cin = xfopen(CONSOLE_DEV, "r");
+ please_display_more_prompt = 0;
+#ifdef BB_FEATURE_USE_TERMIOS
+ getTermSettings(fileno(cin), &initial_settings);
+ new_settings = initial_settings;
+ new_settings.c_lflag &= ~ICANON;
+ new_settings.c_lflag &= ~ECHO;
+#ifndef linux
+ /* Hmm, in linux c_cc[] not parsed if set ~ICANON */
+ new_settings.c_cc[VMIN] = 1;
+ new_settings.c_cc[VTIME] = 0;
+#endif
+ setTermSettings(fileno(cin), &new_settings);
+ atexit(set_tty_to_initial_mode);
+ (void) signal(SIGINT, gotsig);
+ (void) signal(SIGQUIT, gotsig);
+ (void) signal(SIGTERM, gotsig);
#endif
+ }
- while ( (c = getc(f)) != EOF ) {
- if ( next_page ) {
- char garbage;
- int len;
- tlines += lines;
- lines = 0;
- next_page = 0; //Percentage is based on bytes, not lines.
- if ( i && i->source ) //It is not very acurate, but still useful.
- len = printf("%s - %%%2ld - line: %d", i->source, (ftell(f) - sizeb - sizeb) / sizeb, tlines);
- else
- len = printf("line: %d", tlines);
-
- fflush(stdout);
-#ifndef BB_MORE_TERM
- read(2, &garbage, 1);
-#else
- do {
- fread(&garbage, 1, 1, cin);
- } while ((garbage != ' ') && (garbage != '\n'));
+ do {
+ if (argc == 0) {
+ file = stdin;
+ } else
+ file = wfopen(*argv, "r");
+ if(file==0)
+ goto loop;
- if (garbage == '\n') {
- lines = rows;
- tlines -= rows;
- }
- garbage = 0;
- //clear line, since tabs don't overwrite.
- while(len-- > 0) putchar('\b');
- while(len++ < cols) putchar(' ');
- while(len-- > 0) putchar('\b');
- fflush(stdout);
-#endif
+ fstat(fileno(file), &st);
+
+ if(please_display_more_prompt>0)
+ please_display_more_prompt = 0;
+
+#if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS
+ 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
+ len=0;
+ lines = 0;
+ page_height = terminal_height;
+ while ((c = getc(file)) != EOF) {
+
+ if (please_display_more_prompt>0) {
+ len = printf("--More-- ");
+ if (file != stdin) {
+#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
+ len += printf("(%d%% of %ld bytes)",
+ (int) (100 * ((double) ftell(file) /
+ (double) st.st_size)), (long)st.st_size);
+#endif
+ }
+
+ fflush(stdout);
+
+ /*
+ * We've just displayed the "--More--" prompt, so now we need
+ * to get input from the user.
+ */
+ input = getc(cin);
+#ifndef BB_FEATURE_USE_TERMIOS
+ printf("\033[A"); /* up cursor */
+#endif
+ /* Erase the "More" message */
+ putc('\r', stdout);
+ while (--len >= 0)
+ putc(' ', stdout);
+ putc('\r', stdout);
+ fflush(stdout);
+ len=0;
+ lines = 0;
+ page_height = terminal_height;
+ please_display_more_prompt = 0;
+
+ 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')
+ if(please_display_more_prompt==0)
+ 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) {
+ if(please_display_more_prompt==0)
+ 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++;
}
- putchar(c);
- if ( c == '\n' && ++lines == (rows + 1) )
- next_page = 1;
- }
- if ( f != stdin )
- fclose(f);
-#ifdef BB_MORE_TERM
- gotsig(0);
-#endif
+ fclose(file);
+ fflush(stdout);
+loop:
+ argv++;
+ } while (--argc > 0);
+ end:
return 0;
}
projects / oweals / busybox.git / blobdiff