more: do not mess with "/dev/console" (!);
fill whole 1st screen (was "screen sans one line");
fall back to cat if redirected or no ctty
less: fall back to cat if no ctty (was exiting)
resize: cosmetics
This commit is contained in:
Denis Vlasenko
parent
2b52b2797b
commit
4eb8b936cb
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@ -9,6 +9,8 @@
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/* no options, no getopt */
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#include "busybox.h"
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#define ESC "\033"
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int resize_main(int argc, char **argv);
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int resize_main(int argc, char **argv)
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{
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@ -27,10 +29,10 @@ int resize_main(int argc, char **argv)
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* get_cursor_pos [6n
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* restore_cursor_pos 8
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*/
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printf("\0337\033[r\033[999;999H\033[6n");
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scanf("\033[%hu;%huR", &w.ws_row, &w.ws_col);
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printf(ESC"7" ESC"[r" ESC"[999;999H" ESC"[6n");
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scanf(ESC"[%hu;%huR", &w.ws_row, &w.ws_col);
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ret = ioctl(STDOUT_FILENO, TIOCSWINSZ, &w);
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printf("\0338");
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printf(ESC"8");
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tcsetattr(STDOUT_FILENO, TCSANOW, &old);
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if (ENABLE_FEATURE_RESIZE_PRINT)
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printf("COLUMNS=%d;LINES=%d;export COLUMNS LINES;\n",
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@ -1251,6 +1251,9 @@ int less_main(int argc, char **argv)
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* is not a tty and turns into cat. This makes sense. */
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if (!isatty(STDOUT_FILENO))
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return bb_cat(argv);
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kbd_fd = open(CURRENT_TTY, O_RDONLY);
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if (kbd_fd < 0)
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return bb_cat(argv);
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if (!num_files) {
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if (isatty(STDIN_FILENO)) {
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@ -1261,8 +1264,6 @@ int less_main(int argc, char **argv)
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} else
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filename = xstrdup(files[0]);
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kbd_fd = xopen(CURRENT_TTY, O_RDONLY);
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get_terminal_width_height(kbd_fd, &width, &max_displayed_line);
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/* 20: two tabstops + 4 */
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if (width < 20 || max_displayed_line < 3)
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@ -50,52 +50,46 @@ int more_main(int argc, char **argv)
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int terminal_width;
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int terminal_height;
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argc--;
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argv++;
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/* Another popular pager, most, detects when stdout
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* is not a tty and turns into cat. This makes sense. */
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if (!isatty(STDOUT_FILENO))
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return bb_cat(argv);
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cin = fopen(CURRENT_TTY, "r");
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if (!cin)
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return bb_cat(argv);
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cin = stdin;
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/* use input from terminal unless we do "more >outfile" */
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if (isatty(STDOUT_FILENO)) {
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cin = fopen(CURRENT_TTY, "r");
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/* Huh? why not just fail if "/dev/tty" isn't available?
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* If user has no ctty, it's his own problem */
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if (!cin)
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cin = xfopen(DEV_CONSOLE, "r");
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please_display_more_prompt = 2;
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#if ENABLE_FEATURE_USE_TERMIOS
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cin_fileno = fileno(cin);
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getTermSettings(cin_fileno, &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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new_settings.c_cc[VMIN] = 1;
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new_settings.c_cc[VTIME] = 0;
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setTermSettings(cin_fileno, &new_settings);
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atexit(set_tty_to_initial_mode);
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signal(SIGINT, gotsig);
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signal(SIGQUIT, gotsig);
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signal(SIGTERM, gotsig);
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cin_fileno = fileno(cin);
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getTermSettings(cin_fileno, &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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new_settings.c_cc[VMIN] = 1;
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new_settings.c_cc[VTIME] = 0;
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setTermSettings(cin_fileno, &new_settings);
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atexit(set_tty_to_initial_mode);
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signal(SIGINT, gotsig);
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signal(SIGQUIT, gotsig);
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signal(SIGTERM, gotsig);
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#endif
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}
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please_display_more_prompt = 2;
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do {
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file = stdin;
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if (argc != 0) {
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if (*argv) {
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file = fopen_or_warn(*argv, "r");
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if (!file)
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goto loop;
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continue;
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}
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st.st_size = 0;
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fstat(fileno(file), &st);
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please_display_more_prompt &= ~1;
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/* never returns w, h <= 1 */
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get_terminal_width_height(fileno(cin), &terminal_width, &terminal_height);
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if (terminal_height > 4)
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terminal_height -= 2;
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if (terminal_width > 0)
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terminal_width -= 1;
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terminal_width -= 1;
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terminal_height -= 1;
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len = 0;
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lines = 0;
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@ -104,7 +98,7 @@ int more_main(int argc, char **argv)
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if ((please_display_more_prompt & 3) == 3) {
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len = printf("--More-- ");
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if (file != stdin && st.st_size > 0) {
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if (/*file != stdin &&*/ st.st_size > 0) {
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len += printf("(%d%% of %"OFF_FMT"d bytes)",
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(int) (ftello(file)*100 / st.st_size),
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st.st_size);
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@ -123,7 +117,9 @@ int more_main(int argc, char **argv)
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printf("\r%*s\r", len, "");
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len = 0;
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lines = 0;
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page_height = terminal_height;
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/* Bottom line on page will become top line
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* after one page forward. Thus -1: */
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page_height = terminal_height - 1;
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please_display_more_prompt &= ~1;
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if (input == 'q')
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@ -151,12 +147,9 @@ int more_main(int argc, char **argv)
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int quot, rem;
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quot = len / terminal_width;
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rem = len - (quot * terminal_width);
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if (quot) {
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if (rem)
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page_height -= quot;
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else
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page_height -= (quot - 1);
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}
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page_height -= (quot - 1);
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if (rem)
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page_height--;
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}
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if (++lines >= page_height) {
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please_display_more_prompt |= 1;
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@ -168,13 +161,13 @@ int more_main(int argc, char **argv)
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* key other than a return is hit, scroll by one page
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*/
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putc(c, stdout);
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/* My small mind cannot fathom tabs, backspaces,
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* and UTF-8 */
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len++;
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}
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fclose(file);
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fflush(stdout);
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loop:
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argv++;
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} while (--argc > 0);
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} while (*argv && *++argv);
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end:
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return 0;
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}
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