+/* vi: set sw=4 ts=4: */
/*
* Mini more implementation for busybox
*
- * Copyright (C) 1998 by Erik Andersen <andersee@debian.org>
+ *
+ * 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
*
*/
-
-/* Turning this off makes things a bit smaller (and less pretty) */
-#define BB_MORE_TERM
-
-
-
#include "internal.h"
#include <stdio.h>
#include <fcntl.h>
#include <signal.h>
+#include <sys/ioctl.h>
+static const char more_usage[] = "more [file ...]\n";
-static const char more_usage[] = "[file ...]";
+#ifdef BB_FEATURE_USE_TERMIOS
+#include <termio.h>
-/* ED: sparc termios is broken: revert back to old termio handling. */
-#ifdef BB_MORE_TERM
+FILE *cin;
+/* sparc and other have broken termios support: use old termio handling. */
+struct termio initial_settings, new_settings;
+void gotsig(int sig)
+{
+ ioctl(fileno(cin), TCSETAF, &initial_settings);
+ fprintf(stdout, "\n");
+ exit(TRUE);
+}
+#endif
-#if defined (__sparc__)
-# define USE_OLD_TERMIO
-# include <termio.h>
-# include <sys/ioctl.h>
-# define termios termio
-# define stty(fd,argp) ioctl(fd,TCSETAF,argp)
+
+
+#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
-# include <termios.h>
-# define stty(fd,argp) tcsetattr(fd,TCSANOW,argp)
+#define terminal_width TERMINAL_WIDTH
+#define terminal_height TERMINAL_HEIGHT
#endif
- FILE *cin;
- struct termios initial_settings, new_settings;
- void gotsig(int sig) {
- stty(fileno(cin), &initial_settings);
- exit( TRUE);
- }
-#endif
extern int more_main(int argc, char **argv)
{
- int c, lines=0, input=0;
- int next_page=0;
- struct stat st;
- FILE *file;
-
- if ( strcmp(*argv,"--help")==0 || strcmp(*argv,"-h")==0 ) {
- usage (more_usage);
- }
- argc--;
- argv++;
-
- while (argc >= 0) {
- if (argc==0) {
- file = stdin;
- }
- else
- file = fopen(*argv, "r");
+ 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 (file == NULL) {
- perror(*argv);
- exit(FALSE);
+ argc--;
+ argv++;
+
+ if (argc > 0
+ && (strcmp(*argv, "--help") == 0 || strcmp(*argv, "-h") == 0)) {
+ usage(more_usage);
}
- fstat(fileno(file), &st);
-
-#ifdef BB_MORE_TERM
- 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);
+ do {
+ if (argc == 0) {
+ file = stdin;
+ } else
+ file = fopen(*argv, "r");
+
+ if (file == NULL) {
+ perror(*argv);
+ exit(FALSE);
+ }
+ fstat(fileno(file), &st);
+
+#ifdef BB_FEATURE_USE_TERMIOS
+ cin = fopen("/dev/tty", "r");
+ if (!cin)
+ cin = fopen("/dev/console", "r");
+ ioctl(fileno(cin), TCGETA, &initial_settings);
+ new_settings = initial_settings;
+ new_settings.c_lflag &= ~ICANON;
+ new_settings.c_lflag &= ~ECHO;
+ ioctl(fileno(cin), TCSETAF, &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 = initial_settings;
- new_settings.c_lflag &= ~ICANON;
- new_settings.c_lflag &= ~ECHO;
- stty(fileno(cin), &new_settings);
-
- (void) signal(SIGINT, gotsig);
+
+ (void) signal(SIGINT, gotsig);
+ (void) signal(SIGQUIT, gotsig);
+ (void) signal(SIGTERM, gotsig);
#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_MORE_TERM
- ""
+ 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"
+ "\n"
#endif
- );
-
- fflush(stdout);
- input = getc( cin);
-
-#ifdef BB_MORE_TERM
- /* Erase the "More" message */
- while(len-- > 0)
- putc('\b', stdout);
- while(len++ < 79)
- putc(' ', stdout);
- while(len-- > 0)
- putc('\b', stdout);
- fflush(stdout);
+ );
+
+ 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
- }
- if (input=='q')
- goto end;
- if (input==' ' && c == '\n' )
- next_page = 1;
- if ( c == '\n' && ++lines == 24 )
- next_page = 1;
- putc(c, stdout);
- }
- fclose(file);
- fflush(stdout);
+ }
+ 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);
- argc--;
- argv++;
- }
-end:
-#ifdef BB_MORE_TERM
- gotsig(0);
-#endif
- exit(TRUE);
+ argv++;
+ } while (--argc > 0);
+ end:
+#ifdef BB_FEATURE_USE_TERMIOS
+ gotsig(0);
+#endif
+ exit(TRUE);
}
-
projects / oweals / busybox.git / blobdiff