| Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 1 | #include "internal.h" |
| 2 | #include <stdio.h> |
| 3 | #include <sys/types.h> |
| 4 | #include <sys/stat.h> |
| 5 | #include <sys/ioctl.h> |
| 6 | #include <fcntl.h> |
| 7 | |
| 8 | #define BB_MORE_TERM |
| 9 | |
| 10 | #ifdef BB_MORE_TERM |
| 11 | #include <termios.h> |
| 12 | #include <signal.h> |
| 13 | |
| 14 | FILE *cin; |
| 15 | struct termios initial_settings, new_settings; |
| 16 | |
| 17 | void gotsig(int sig) { |
| 18 | tcsetattr(fileno(cin), TCSANOW, &initial_settings); |
| 19 | exit(0); |
| 20 | } |
| 21 | #endif |
| 22 | |
| 23 | const char more_usage[] = "more [file]\n" |
| 24 | "\n" |
| 25 | "\tDisplays a file, one page at a time.\n" |
| 26 | "\tIf there are no arguments, the standard input is displayed.\n"; |
| 27 | |
| 28 | extern int |
| 29 | more_fn(const struct FileInfo * i) |
| 30 | { |
| 31 | FILE * f = stdin; |
| 32 | int c; |
| 33 | int lines = 0, tlines = 0; |
| 34 | int next_page = 0; |
| 35 | int rows = 24, cols = 79; |
| 36 | #ifdef BB_MORE_TERM |
| 37 | long sizeb = 0; |
| 38 | struct stat st; |
| 39 | struct winsize win; |
| 40 | #endif |
| 41 | |
| 42 | if ( i ) { |
| 43 | if (! (f = fopen(i->source, "r") )) { |
| 44 | name_and_error(i->source); |
| 45 | return 1; |
| 46 | } |
| 47 | fstat(fileno(f), &st); |
| 48 | sizeb = st.st_size / 100; |
| 49 | } |
| 50 | |
| 51 | #ifdef BB_MORE_TERM |
| 52 | cin = fopen("/dev/tty", "r"); |
| 53 | tcgetattr(fileno(cin),&initial_settings); |
| 54 | new_settings = initial_settings; |
| 55 | new_settings.c_lflag &= ~ICANON; |
| 56 | new_settings.c_lflag &= ~ECHO; |
| 57 | tcsetattr(fileno(cin), TCSANOW, &new_settings); |
| 58 | |
| 59 | (void) signal(SIGINT, gotsig); |
| 60 | |
| 61 | ioctl(STDOUT_FILENO, TIOCGWINSZ, &win); |
| 62 | if (win.ws_row > 4) rows = win.ws_row - 2; |
| 63 | if (win.ws_col > 0) cols = win.ws_col - 1; |
| 64 | |
| 65 | |
| 66 | #endif |
| 67 | |
| 68 | while ( (c = getc(f)) != EOF ) { |
| 69 | if ( next_page ) { |
| 70 | char garbage; |
| 71 | int len; |
| 72 | tlines += lines; |
| 73 | lines = 0; |
| 74 | next_page = 0; //Percentage is based on bytes, not lines. |
| 75 | if ( i && i->source ) //It is not very acurate, but still useful. |
| 76 | len = printf("%s - %%%2ld - line: %d", i->source, (ftell(f) - sizeb - sizeb) / sizeb, tlines); |
| 77 | else |
| 78 | len = printf("line: %d", tlines); |
| 79 | |
| 80 | fflush(stdout); |
| 81 | #ifndef BB_MORE_TERM |
| 82 | read(2, &garbage, 1); |
| 83 | #else |
| 84 | do { |
| 85 | fread(&garbage, 1, 1, cin); |
| 86 | } while ((garbage != ' ') && (garbage != '\n')); |
| 87 | |
| 88 | if (garbage == '\n') { |
| 89 | lines = rows; |
| 90 | tlines -= rows; |
| 91 | } |
| 92 | garbage = 0; |
| 93 | //clear line, since tabs don't overwrite. |
| 94 | while(len-- > 0) putchar('\b'); |
| 95 | while(len++ < cols) putchar(' '); |
| 96 | while(len-- > 0) putchar('\b'); |
| 97 | fflush(stdout); |
| 98 | #endif |
| 99 | } |
| 100 | putchar(c); |
| 101 | if ( c == '\n' && ++lines == (rows + 1) ) |
| 102 | next_page = 1; |
| 103 | } |
| 104 | if ( f != stdin ) |
| 105 | fclose(f); |
| 106 | #ifdef BB_MORE_TERM |
| 107 | gotsig(0); |
| 108 | #endif |
| 109 | return 0; |
| 110 | } |