+/*
+ * 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.
+ *
+ * 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 "internal.h"
#include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
#include <fcntl.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+
+static const char more_usage[] = "more [file ...]\n";
-#define BB_MORE_TERM
+/* ED: sparc termios is broken: revert back to old termio handling. */
+#ifdef BB_FEATURE_USE_TERMIOS
-#ifdef BB_MORE_TERM
- #include <termios.h>
- #include <signal.h>
+#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
- FILE *cin;
- struct termios initial_settings, new_settings;
+ FILE *cin;
+ struct termios initial_settings, new_settings;
- void gotsig(int sig) {
- tcsetattr(fileno(cin), TCSANOW, &initial_settings);
- exit(0);
- }
+ void gotsig(int sig) {
+ stty(fileno(cin), &initial_settings);
+ fprintf(stdout, "\n");
+ exit( TRUE);
+ }
#endif
-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)
+
+#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
+
+
+
+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=0, input=0;
+ int next_page=0;
+ struct stat st;
+ FILE *file;
+#ifdef BB_FEATURE_AUTOWIDTH
+ struct winsize win = {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;
+
+ 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);
}
-
-#ifdef BB_MORE_TERM
+ 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);
+#else
tcgetattr(fileno(cin),&initial_settings);
+#endif
new_settings = initial_settings;
new_settings.c_lflag &= ~ICANON;
new_settings.c_lflag &= ~ECHO;
- tcsetattr(fileno(cin), TCSANOW, &new_settings);
-
+ stty(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
+
(void) signal(SIGINT, gotsig);
+ (void) signal(SIGQUIT, gotsig);
+ (void) signal(SIGTERM, 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;
+#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_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);
+ fflush(stdout);
#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'));
-
- 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
- }
- putchar(c);
- if ( c == '\n' && ++lines == (rows + 1) )
+ }
+ 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);
}
- if ( f != stdin )
- fclose(f);
-#ifdef BB_MORE_TERM
- gotsig(0);
+ fclose(file);
+ fflush(stdout);
+
+ argv++;
+ } while (--argc > 0);
+end:
+#ifdef BB_FEATURE_USE_TERMIOS
+ gotsig(0);
#endif
- return 0;
+ exit(TRUE);
}
+
projects / oweals / busybox.git / blobdiff