+/* 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>
+#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
+ ;
+
+/* 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
+
+FILE *cin;
+
+struct termios initial_settings, new_settings;
+
+void gotsig(int sig)
+{
+ setTermSettings(fileno(cin), &initial_settings);
+ fprintf(stdout, "\n");
+ exit(TRUE);
+}
+#endif /* BB_FEATURE_USE_TERMIOS */
-const char more_usage[] = "[file ...]";
-
-
-#ifdef BB_MORE_TERM
- #include <termios.h>
- #include <signal.h>
- #include <sys/ioctl.h>
-
- FILE *cin;
- struct termios initial_settings, new_settings;
+static int terminal_width = 79; /* not 80 in case terminal has linefold bug */
+static int terminal_height = 24;
- void gotsig(int sig) {
- tcsetattr(fileno(cin), TCSANOW, &initial_settings);
- exit( TRUE);
- }
-#endif
extern int more_main(int argc, char **argv)
{
- int c, lines=0, input=0;
- int next_page=0, rows = 24;
-#ifdef BB_MORE_TERM
- int cols=79;
- struct winsize win;
-#endif
- struct stat st;
- FILE *file = stdin;
-
- if ( strcmp(*argv,"--help")==0 || strcmp(*argv,"-h")==0 ) {
- usage (more_usage);
- }
- argc--;
- argv++;
-
- while (argc-- > 0) {
- file = fopen(*argv, "r");
- if (file == NULL) {
- perror("Can't open file");
- exit(FALSE);
- }
- fstat(fileno(file), &st);
- fprintf(stderr, "hi\n");
+ int c, lines = 0, input = 0;
+ int please_display_more_prompt = 0;
+ struct stat st;
+ FILE *file;
-#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);
+#if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS
+ struct winsize win = { 0, 0 };
+#endif
- 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++;
+ if (argc > 0
+ && (strcmp(*argv, dash_dash_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);
+ }
+ 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
+
+ (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-- (%d%% of %ld bytes)%s",
- (int) (100*( (double) ftell(file) / (double) st.st_size )),
- st.st_size,
-#ifdef BB_MORE_TERM
- ""
+ while ((c = getc(file)) != EOF) {
+ if (please_display_more_prompt) {
+ int len = 0;
+
+ please_display_more_prompt = 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( stdin);
-
-#ifdef BB_MORE_TERM
- /* Erase the "More" message */
- while(len-- > 0)
- putc('\b', stdout);
- while(len++ < cols)
- putc(' ', stdout);
- while(len-- > 0)
- putc('\b', stdout);
- fflush(stdout);
+ fflush(stdout);
+
+ /*
+ * We've just displayed the "--More--" prompt, so now we need
+ * to get input from the user.
+ */
+#ifdef BB_FEATURE_USE_TERMIOS
+ input = getc(cin);
+#else
+ input = getc(stdin);
#endif
- }
- if (input=='q')
- goto end;
- if (input==' ' && c == '\n' )
- next_page = 1;
- if ( c == '\n' && ++lines == (rows + 1) )
- next_page = 1;
- putc(c, stdout);
- }
- fclose(file);
- fflush(stdout);
+#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
- argc--;
- argv++;
- }
-end:
-#ifdef BB_MORE_TERM
- gotsig(0);
-#endif
- exit(TRUE);
-}
+ }
+
+ /*
+ * 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*/
+ please_display_more_prompt = 1;
+ break;
+ }
+ if (++lines == terminal_height)
+ please_display_more_prompt = 1;
+ }
+ /*
+ * 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);
+ }
+ fclose(file);
+ fflush(stdout);
+ argv++;
+ } while (--argc > 0);
+ end:
+#ifdef BB_FEATURE_USE_TERMIOS
+ gotsig(0);
+#endif
+ return(TRUE);
+}
projects / oweals / busybox.git / blobdiff