Initial revision

util-linux/more.c

@@ -0,0 +1,110 @@
+#include "internal.h"
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+
+#define BB_MORE_TERM
+
+#ifdef BB_MORE_TERM
+	#include <termios.h>
+	#include <signal.h>
+
+	FILE *cin;
+	struct termios initial_settings, new_settings;
+
+	void gotsig(int sig) { 
+		tcsetattr(fileno(cin), TCSANOW, &initial_settings);
+		exit(0);
+	}
+#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)
+{
+	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;
+#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;
+
+
+#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) )
+			next_page = 1;
+	}
+	if ( f != stdin )
+		fclose(f);
+#ifdef BB_MORE_TERM
+	gotsig(0);
+#endif	
+	return 0;
+}