diff options
| -rw-r--r-- | miscutils/less.c | 211 |
1 files changed, 209 insertions, 2 deletions
diff --git a/miscutils/less.c b/miscutils/less.c index c66788007..1af9685bf 100644 --- a/miscutils/less.c +++ b/miscutils/less.c @@ -1488,7 +1488,7 @@ static void keypress_process(int keypress) colon_process(); break; #if ENABLE_FEATURE_LESS_REWRAP - case '*': + case '*': /* Should be -N command / option */ option_mask32 ^= FLAG_N; get_terminal_width_height(kbd_fd, &width, &max_displayed_line); if (width < 20) /* 20: two tabstops + 4 */ @@ -1501,7 +1501,7 @@ static void keypress_process(int keypress) re_wrap(); buffer_fill_and_print(); break; - case '&': + case '&': /* Should be -S command / option */ option_mask32 ^= LESS_STATE_NO_WRAP; buffer_fill_and_print(); break; @@ -1578,3 +1578,210 @@ int less_main(int argc, char **argv) keypress_process(keypress); } } + +/* +Help text of less version 418 is below. +If you are implementing something, keeping +key and/or command line switch compatibility is a good idea: + + + SUMMARY OF LESS COMMANDS + + Commands marked with * may be preceded by a number, N. + Notes in parentheses indicate the behavior if N is given. + h H Display this help. + q :q Q :Q ZZ Exit. + --------------------------------------------------------------------------- + MOVING + e ^E j ^N CR * Forward one line (or N lines). + y ^Y k ^K ^P * Backward one line (or N lines). + f ^F ^V SPACE * Forward one window (or N lines). + b ^B ESC-v * Backward one window (or N lines). + z * Forward one window (and set window to N). + w * Backward one window (and set window to N). + ESC-SPACE * Forward one window, but don't stop at end-of-file. + d ^D * Forward one half-window (and set half-window to N). + u ^U * Backward one half-window (and set half-window to N). + ESC-) RightArrow * Left one half screen width (or N positions). + ESC-( LeftArrow * Right one half screen width (or N positions). + F Forward forever; like "tail -f". + r ^R ^L Repaint screen. + R Repaint screen, discarding buffered input. + --------------------------------------------------- + Default "window" is the screen height. + Default "half-window" is half of the screen height. + --------------------------------------------------------------------------- + SEARCHING + /pattern * Search forward for (N-th) matching line. + ?pattern * Search backward for (N-th) matching line. + n * Repeat previous search (for N-th occurrence). + N * Repeat previous search in reverse direction. + ESC-n * Repeat previous search, spanning files. + ESC-N * Repeat previous search, reverse dir. & spanning files. + ESC-u Undo (toggle) search highlighting. + --------------------------------------------------- + Search patterns may be modified by one or more of: + ^N or ! Search for NON-matching lines. + ^E or * Search multiple files (pass thru END OF FILE). + ^F or @ Start search at FIRST file (for /) or last file (for ?). + ^K Highlight matches, but don't move (KEEP position). + ^R Don't use REGULAR EXPRESSIONS. + --------------------------------------------------------------------------- + JUMPING + g < ESC-< * Go to first line in file (or line N). + G > ESC-> * Go to last line in file (or line N). + p % * Go to beginning of file (or N percent into file). + t * Go to the (N-th) next tag. + T * Go to the (N-th) previous tag. + { ( [ * Find close bracket } ) ]. + } ) ] * Find open bracket { ( [. + ESC-^F <c1> <c2> * Find close bracket <c2>. + ESC-^B <c1> <c2> * Find open bracket <c1> + --------------------------------------------------- + Each "find close bracket" command goes forward to the close bracket + matching the (N-th) open bracket in the top line. + Each "find open bracket" command goes backward to the open bracket + matching the (N-th) close bracket in the bottom line. + m<letter> Mark the current position with <letter>. + '<letter> Go to a previously marked position. + '' Go to the previous position. + ^X^X Same as '. + --------------------------------------------------- + A mark is any upper-case or lower-case letter. + Certain marks are predefined: + ^ means beginning of the file + $ means end of the file + --------------------------------------------------------------------------- + CHANGING FILES + :e [file] Examine a new file. + ^X^V Same as :e. + :n * Examine the (N-th) next file from the command line. + :p * Examine the (N-th) previous file from the command line. + :x * Examine the first (or N-th) file from the command line. + :d Delete the current file from the command line list. + = ^G :f Print current file name. + --------------------------------------------------------------------------- + MISCELLANEOUS COMMANDS + -<flag> Toggle a command line option [see OPTIONS below]. + --<name> Toggle a command line option, by name. + _<flag> Display the setting of a command line option. + __<name> Display the setting of an option, by name. + +cmd Execute the less cmd each time a new file is examined. + !command Execute the shell command with $SHELL. + |Xcommand Pipe file between current pos & mark X to shell command. + v Edit the current file with $VISUAL or $EDITOR. + V Print version number of "less". + --------------------------------------------------------------------------- + OPTIONS + Most options may be changed either on the command line, + or from within less by using the - or -- command. + Options may be given in one of two forms: either a single + character preceded by a -, or a name preceeded by --. + -? ........ --help + Display help (from command line). + -a ........ --search-skip-screen + Forward search skips current screen. + -b [N] .... --buffers=[N] + Number of buffers. + -B ........ --auto-buffers + Don't automatically allocate buffers for pipes. + -c ........ --clear-screen + Repaint by clearing rather than scrolling. + -d ........ --dumb + Dumb terminal. + -D [xn.n] . --color=xn.n + Set screen colors. (MS-DOS only) + -e -E .... --quit-at-eof --QUIT-AT-EOF + Quit at end of file. + -f ........ --force + Force open non-regular files. + -F ........ --quit-if-one-screen + Quit if entire file fits on first screen. + -g ........ --hilite-search + Highlight only last match for searches. + -G ........ --HILITE-SEARCH + Don't highlight any matches for searches. + -h [N] .... --max-back-scroll=[N] + Backward scroll limit. + -i ........ --ignore-case + Ignore case in searches that do not contain uppercase. + -I ........ --IGNORE-CASE + Ignore case in all searches. + -j [N] .... --jump-target=[N] + Screen position of target lines. + -J ........ --status-column + Display a status column at left edge of screen. + -k [file] . --lesskey-file=[file] + Use a lesskey file. + -L ........ --no-lessopen + Ignore the LESSOPEN environment variable. + -m -M .... --long-prompt --LONG-PROMPT + Set prompt style. + -n -N .... --line-numbers --LINE-NUMBERS + Don't use line numbers. + -o [file] . --log-file=[file] + Copy to log file (standard input only). + -O [file] . --LOG-FILE=[file] + Copy to log file (unconditionally overwrite). + -p [pattern] --pattern=[pattern] + Start at pattern (from command line). + -P [prompt] --prompt=[prompt] + Define new prompt. + -q -Q .... --quiet --QUIET --silent --SILENT + Quiet the terminal bell. + -r -R .... --raw-control-chars --RAW-CONTROL-CHARS + Output "raw" control characters. + -s ........ --squeeze-blank-lines + Squeeze multiple blank lines. + -S ........ --chop-long-lines + Chop long lines. + -t [tag] .. --tag=[tag] + Find a tag. + -T [tagsfile] --tag-file=[tagsfile] + Use an alternate tags file. + -u -U .... --underline-special --UNDERLINE-SPECIAL + Change handling of backspaces. + -V ........ --version + Display the version number of "less". + -w ........ --hilite-unread + Highlight first new line after forward-screen. + -W ........ --HILITE-UNREAD + Highlight first new line after any forward movement. + -x [N[,...]] --tabs=[N[,...]] + Set tab stops. + -X ........ --no-init + Don't use termcap init/deinit strings. + --no-keypad + Don't use termcap keypad init/deinit strings. + -y [N] .... --max-forw-scroll=[N] + Forward scroll limit. + -z [N] .... --window=[N] + Set size of window. + -" [c[c]] . --quotes=[c[c]] + Set shell quote characters. + -~ ........ --tilde + Don't display tildes after end of file. + -# [N] .... --shift=[N] + Horizontal scroll amount (0 = one half screen width) + + --------------------------------------------------------------------------- + LINE EDITING + These keys can be used to edit text being entered + on the "command line" at the bottom of the screen. + RightArrow ESC-l Move cursor right one character. + LeftArrow ESC-h Move cursor left one character. + CNTL-RightArrow ESC-RightArrow ESC-w Move cursor right one word. + CNTL-LeftArrow ESC-LeftArrow ESC-b Move cursor left one word. + HOME ESC-0 Move cursor to start of line. + END ESC-$ Move cursor to end of line. + BACKSPACE Delete char to left of cursor. + DELETE ESC-x Delete char under cursor. + CNTL-BACKSPACE ESC-BACKSPACE Delete word to left of cursor. + CNTL-DELETE ESC-DELETE ESC-X Delete word under cursor. + CNTL-U ESC (MS-DOS only) Delete entire line. + UpArrow ESC-k Retrieve previous command line. + DownArrow ESC-j Retrieve next command line. + TAB Complete filename & cycle. + SHIFT-TAB ESC-TAB Complete filename & reverse cycle. + CNTL-L Complete filename, list all. +*/ |