111 lines
2.3 KiB
C
111 lines
2.3 KiB
C
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#include "internal.h"
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#define BB_MORE_TERM
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#ifdef BB_MORE_TERM
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#include <termios.h>
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#include <signal.h>
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FILE *cin;
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struct termios initial_settings, new_settings;
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void gotsig(int sig) {
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tcsetattr(fileno(cin), TCSANOW, &initial_settings);
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exit(0);
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}
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#endif
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const char more_usage[] = "more [file]\n"
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"\n"
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"\tDisplays a file, one page at a time.\n"
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"\tIf there are no arguments, the standard input is displayed.\n";
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extern int
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more_fn(const struct FileInfo * i)
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{
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FILE * f = stdin;
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int c;
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int lines = 0, tlines = 0;
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int next_page = 0;
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int rows = 24, cols = 79;
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#ifdef BB_MORE_TERM
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long sizeb = 0;
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struct stat st;
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struct winsize win;
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#endif
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if ( i ) {
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if (! (f = fopen(i->source, "r") )) {
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name_and_error(i->source);
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return 1;
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}
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fstat(fileno(f), &st);
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sizeb = st.st_size / 100;
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}
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#ifdef BB_MORE_TERM
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cin = fopen("/dev/tty", "r");
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tcgetattr(fileno(cin),&initial_settings);
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new_settings = initial_settings;
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new_settings.c_lflag &= ~ICANON;
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new_settings.c_lflag &= ~ECHO;
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tcsetattr(fileno(cin), TCSANOW, &new_settings);
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(void) signal(SIGINT, gotsig);
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ioctl(STDOUT_FILENO, TIOCGWINSZ, &win);
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if (win.ws_row > 4) rows = win.ws_row - 2;
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if (win.ws_col > 0) cols = win.ws_col - 1;
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#endif
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while ( (c = getc(f)) != EOF ) {
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if ( next_page ) {
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char garbage;
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int len;
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tlines += lines;
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lines = 0;
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next_page = 0; //Percentage is based on bytes, not lines.
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if ( i && i->source ) //It is not very acurate, but still useful.
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len = printf("%s - %%%2ld - line: %d", i->source, (ftell(f) - sizeb - sizeb) / sizeb, tlines);
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else
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len = printf("line: %d", tlines);
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fflush(stdout);
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#ifndef BB_MORE_TERM
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read(2, &garbage, 1);
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#else
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do {
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fread(&garbage, 1, 1, cin);
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} while ((garbage != ' ') && (garbage != '\n'));
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if (garbage == '\n') {
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lines = rows;
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tlines -= rows;
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}
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garbage = 0;
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//clear line, since tabs don't overwrite.
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while(len-- > 0) putchar('\b');
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while(len++ < cols) putchar(' ');
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while(len-- > 0) putchar('\b');
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fflush(stdout);
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#endif
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}
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putchar(c);
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if ( c == '\n' && ++lines == (rows + 1) )
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next_page = 1;
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}
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if ( f != stdin )
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fclose(f);
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#ifdef BB_MORE_TERM
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gotsig(0);
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#endif
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return 0;
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}
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