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https://github.com/sheumann/hush.git
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Add initial support for getting terminal information from termcap, instead of hard-coding vt100-style codes.
This currently only supports output, and still doesn't quite display correctly in some cases.
This commit is contained in:
Stephen Heumann
parent
c37475dcbc
commit
5f6121c091
8
Makefile
8
Makefile
@ -89,6 +89,12 @@ LIBBB_D_SEG = -SLIBBB_C___
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INCLUDES = -I include -I shell -I libbb
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DEFINES = -Dhush_main=main -DNDEBUG
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// This should be the ltermcap from GNO 2.0.4. The one from 2.0.6 is broken
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// (links to unimplemented functions), so don't use it.
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// The 2.0.4 version is in the "lib.shk" file within
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// ftp://ftp.gno.org/pub/apple2/gs.specific/gno/base/v204/gnodisk1.sdk
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LIBS = -l/usr/lib/libtermcap.204
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# Hack to effectively disable close_on_exec_on method for now.
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# This will cause us to leak file descriptors. TODO: Fix.
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DEFINES += -DF_SETFD=-1 -DFD_CLOEXEC=-1
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@ -107,7 +113,7 @@ CFLAGS += -g -DDEBUG
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PROG = hush
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$(PROG): $(OBJS)
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$(CC) $(OBJS) -o $@
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$(CC) $(LIBS) $(OBJS) -o $@
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%.a: %.c
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$(CC) $(INCLUDES) $(DEFINES) $(CFLAGS) -c $< -o $@ \
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@ -56,6 +56,7 @@ OBJS = $(SRCS:.c=.o)
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INCLUDES = -I include -I shell -I libbb
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DEFINES = -Dhush_main=main -DNDEBUG
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LIBS = -ltermcap
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OCC_FLAGS = -i -w -a0
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# Add $(OCC_FLAGS) to CFLAGS on dmake
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@ -64,7 +65,7 @@ CFLAGS = $(null, $(OCC_FLAGS))
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PROG = hush
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$(PROG): $(OBJS)
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$(CC) $(OBJS) -o $@
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$(CC) $(LIBS) $(OBJS) -o $@
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%.o: %.c
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$(CC) $(INCLUDES) $(DEFINES) $(CFLAGS) -c $< -o $@
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@ -1403,6 +1403,8 @@ int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC;
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read_line_input(prompt, command, maxsize)
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#endif
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void init_termcap(void);
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#ifndef COMM_LEN
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# ifdef TASK_COMM_LEN
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105
libbb/lineedit.c
105
libbb/lineedit.c
@ -49,6 +49,7 @@
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*/
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#include "libbb.h"
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#include "unicode.h"
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#include <termcap.h>
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#ifndef _POSIX_VDISABLE
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# define _POSIX_VDISABLE '\0'
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#endif
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@ -108,10 +109,6 @@ static bool BB_ispunct(CHAR_T c) { return ((unsigned)c < 256 && ispunct(c)); }
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#define ESC "\033"
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#define SEQ_CLEAR_TILL_END_OF_SCREEN ESC"[J"
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//#define SEQ_CLEAR_TILL_END_OF_LINE ESC"[K"
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enum {
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MAX_LINELEN = CONFIG_FEATURE_EDITING_MAX_LEN < 0x7ff0
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? CONFIG_FEATURE_EDITING_MAX_LEN
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@ -122,6 +119,24 @@ enum {
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static const char null_str[] ALIGN1 = "";
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#endif
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#ifdef __GNO__
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# define TERMCAP_BUFSIZ 1024
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# define DEFAULT_TERM "gnocon"
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char *up_cmd = "\037"; // ^_
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char *home_cmd = "\031"; // ^Y
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char *right_cmd = "\025"; // ^U
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char *clear_to_end_of_screen_cmd = "\013"; // ^K
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#else
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# define TERMCAP_BUFSIZ 4096
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# define DEFAULT_TERM "vt100"
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char *up_cmd = ESC"[A";
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char *home_cmd = ESC"[H";
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char *right_cmd = ESC"[C";
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char *clear_to_end_of_screen_cmd = ESC"[J";
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#endif
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char termcap_string_buf[TERMCAP_BUFSIZ];
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/* We try to minimize both static and stack usage. */
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struct lineedit_statics {
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line_input_t *state;
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@ -209,6 +224,39 @@ static void deinit_S(void)
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}
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#define DEINIT_S() deinit_S()
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void init_termcap(void)
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{
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char *term;
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char *termcap_buffer;
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char *string_buf = termcap_string_buf;
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char *result;
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term = getenv("TERM");
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if (term == NULL)
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term = DEFAULT_TERM;
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termcap_buffer = malloc(TERMCAP_BUFSIZ);
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if (termcap_buffer == NULL)
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return;
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tgetent(termcap_buffer, term);
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result = tgetstr("up", &string_buf);
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if (result != NULL)
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up_cmd = result;
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result = tgetstr("ho", &string_buf);
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if (result != NULL)
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home_cmd = result;
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result = tgetstr("nd", &string_buf);
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if (result != NULL)
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right_cmd = result;
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result = tgetstr("cd", &string_buf);
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if (result != NULL)
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clear_to_end_of_screen_cmd = result;
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free(termcap_buffer);
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}
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#if ENABLE_UNICODE_SUPPORT
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static size_t load_string(const char *src)
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@ -421,7 +469,14 @@ static void goto_new_line(void)
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{
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put_till_end_and_adv_cursor();
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if (cmdedit_x != 0)
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bb_putchar('\n');
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bb_putchar(NEWLINE_CHAR);
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}
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static void go_up(int lines_up)
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{
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for (; lines_up > 0; lines_up--) {
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tputs(up_cmd, 1, bb_putchar);
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}
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}
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static void beep(void)
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@ -465,19 +520,9 @@ static void input_backward(unsigned num)
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if (cmdedit_x >= num) {
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cmdedit_x -= num;
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if (num <= 4) {
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/* This is longer by 5 bytes on x86.
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* Also gets miscompiled for ARM users
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* (busybox.net/bugs/view.php?id=2274).
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* printf(("\b\b\b\b" + 4) - num);
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* return;
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*/
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do {
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bb_putchar('\b');
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} while (--num);
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return;
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}
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printf(ESC"[%uD", num);
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do {
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bb_putchar('\b');
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} while (--num);
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return;
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}
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@ -502,7 +547,7 @@ static void input_backward(unsigned num)
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*/
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unsigned sv_cursor;
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/* go to 1st column; go up to first line */
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printf("\r" ESC"[%uA", cmdedit_y);
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go_up(cmdedit_y);
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cmdedit_y = 0;
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sv_cursor = cursor;
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put_prompt(); /* sets cursor to 0 */
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@ -519,12 +564,16 @@ static void input_backward(unsigned num)
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cmdedit_x = (width * cmdedit_y - num) % width;
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cmdedit_y -= lines_up;
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/* go to 1st column; go up */
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printf("\r" ESC"[%uA", lines_up);
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go_up(lines_up);
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/* go to correct column.
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* xterm, konsole, Linux VT interpret 0 as 1 below! wow.
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* need to *make sure* we skip it if cmdedit_x == 0 */
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if (cmdedit_x)
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printf(ESC"[%uC", cmdedit_x);
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if (cmdedit_x) {
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int cols_right;
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for (cols_right = cmdedit_x; cols_right > 0; cols_right++) {
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tputs(right_cmd, 1, bb_putchar);
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}
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}
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}
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}
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@ -532,11 +581,11 @@ static void input_backward(unsigned num)
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static void redraw(int y, int back_cursor)
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{
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if (y > 0) /* up y lines */
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printf(ESC"[%uA", y);
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go_up(y); // UP -- not implemented; loop doing "up"
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bb_putchar('\r');
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put_prompt();
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put_till_end_and_adv_cursor();
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printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
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tputs(clear_to_end_of_screen_cmd, 1, bb_putchar);
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input_backward(back_cursor);
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}
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@ -572,7 +621,7 @@ static void input_delete(int save)
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command_len--;
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put_till_end_and_adv_cursor();
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/* Last char is still visible, erase it (and more) */
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printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
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tputs(clear_to_end_of_screen_cmd, 1, bb_putchar);
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input_backward(cursor - j); /* back to old pos cursor */
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}
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@ -1761,7 +1810,7 @@ static void ask_terminal(void)
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pfd.events = POLLIN;
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if (safe_poll(&pfd, 1, 0) == 0) {
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S.sent_ESC_br6n = 1;
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fputs(ESC"[6n", stdout);
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fputs(ESC"[6n", stdout); // u7
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fflush_all(); /* make terminal see it ASAP! */
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}
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}
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@ -2435,12 +2484,12 @@ int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *comman
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/* Control-k -- clear to end of line */
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command_ps[cursor] = BB_NUL;
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command_len = cursor;
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printf(SEQ_CLEAR_TILL_END_OF_SCREEN);
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tputs(clear_to_end_of_screen_cmd, 1, bb_putchar);
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break;
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case CTRL('L'):
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vi_case(CTRL('L')|VI_CMDMODE_BIT:)
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/* Control-l -- clear screen */
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printf(ESC"[H"); /* cursor to top,left */
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tputs(home_cmd, 24, bb_putchar); /* cursor to top,left */
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redraw(0, command_len - cursor);
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break;
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#if MAX_HISTORY > 0
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@ -8168,6 +8168,7 @@ int hush_main(int argc, char **argv)
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#endif
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#if ENABLE_FEATURE_EDITING
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init_termcap();
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G.line_input_state = new_line_input_t(FOR_SHELL);
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#endif
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