*/
#include "libbb.h"
#include "unicode.h"
+#ifndef _POSIX_VDISABLE
+# define _POSIX_VDISABLE '\0'
+#endif
+
#ifdef TEST
# define ENABLE_FEATURE_EDITING 0
IF_FEATURE_EDITING_FANCY_PROMPT(num_ok_lines = 1;) \
IF_USERNAME_OR_HOMEDIR(home_pwd_buf = (char*)null_str;) \
} while (0)
+
static void deinit_S(void)
{
#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
#if ENABLE_UNICODE_SUPPORT
-static size_t load_string(const char *src, int maxsize)
+static size_t load_string(const char *src)
{
- ssize_t len = mbstowcs(command_ps, src, maxsize - 1);
- if (len < 0)
- len = 0;
- command_ps[len] = BB_NUL;
- return len;
+ if (unicode_status == UNICODE_ON) {
+ ssize_t len = mbstowcs(command_ps, src, S.maxsize - 1);
+ if (len < 0)
+ len = 0;
+ command_ps[len] = BB_NUL;
+ return len;
+ } else {
+ unsigned i = 0;
+ while (src[i] && i < S.maxsize - 1) {
+ command_ps[i] = src[i];
+ i++;
+ }
+ command_ps[i] = BB_NUL;
+ return i;
+ }
}
static unsigned save_string(char *dst, unsigned maxsize)
{
+ if (unicode_status == UNICODE_ON) {
# if !ENABLE_UNICODE_PRESERVE_BROKEN
- ssize_t len = wcstombs(dst, command_ps, maxsize - 1);
- if (len < 0)
- len = 0;
- dst[len] = '\0';
- return len;
+ ssize_t len = wcstombs(dst, command_ps, maxsize - 1);
+ if (len < 0)
+ len = 0;
+ dst[len] = '\0';
+ return len;
# else
- unsigned dstpos = 0;
- unsigned srcpos = 0;
+ unsigned dstpos = 0;
+ unsigned srcpos = 0;
- maxsize--;
- while (dstpos < maxsize) {
- wchar_t wc;
- int n = srcpos;
+ maxsize--;
+ while (dstpos < maxsize) {
+ wchar_t wc;
+ int n = srcpos;
- /* Convert up to 1st invalid byte (or up to end) */
- while ((wc = command_ps[srcpos]) != BB_NUL
- && !unicode_is_raw_byte(wc)
- ) {
+ /* Convert up to 1st invalid byte (or up to end) */
+ while ((wc = command_ps[srcpos]) != BB_NUL
+ && !unicode_is_raw_byte(wc)
+ ) {
+ srcpos++;
+ }
+ command_ps[srcpos] = BB_NUL;
+ n = wcstombs(dst + dstpos, command_ps + n, maxsize - dstpos);
+ if (n < 0) /* should not happen */
+ break;
+ dstpos += n;
+ if (wc == BB_NUL) /* usually is */
+ break;
+
+ /* We do have invalid byte here! */
+ command_ps[srcpos] = wc; /* restore it */
srcpos++;
+ if (dstpos == maxsize)
+ break;
+ dst[dstpos++] = (char) wc;
}
- command_ps[srcpos] = BB_NUL;
- n = wcstombs(dst + dstpos, command_ps + n, maxsize - dstpos);
- if (n < 0) /* should not happen */
- break;
- dstpos += n;
- if (wc == BB_NUL) /* usually is */
- break;
-
- /* We do have invalid byte here! */
- command_ps[srcpos] = wc; /* restore it */
- srcpos++;
- if (dstpos == maxsize)
- break;
- dst[dstpos++] = (char) wc;
- }
- dst[dstpos] = '\0';
- return dstpos;
+ dst[dstpos] = '\0';
+ return dstpos;
# endif
+ } else {
+ unsigned i = 0;
+ while ((dst[i] = command_ps[i]) != 0)
+ i++;
+ return i;
+ }
}
/* I thought just fputwc(c, stdout) would work. But no... */
static void BB_PUTCHAR(wchar_t c)
{
- char buf[MB_CUR_MAX + 1];
- mbstate_t mbst = { 0 };
- ssize_t len;
-
- len = wcrtomb(buf, c, &mbst);
- if (len > 0) {
- buf[len] = '\0';
- fputs(buf, stdout);
+ if (unicode_status == UNICODE_ON) {
+ char buf[MB_CUR_MAX + 1];
+ mbstate_t mbst = { 0 };
+ ssize_t len = wcrtomb(buf, c, &mbst);
+ if (len > 0) {
+ buf[len] = '\0';
+ fputs(buf, stdout);
+ }
+ } else {
+ /* In this case, c is always one byte */
+ putchar(c);
}
}
# if ENABLE_UNICODE_COMBINING_WCHARS || ENABLE_UNICODE_WIDE_WCHARS
return wc;
}
#else /* !UNICODE */
-static size_t load_string(const char *src, int maxsize)
+static size_t load_string(const char *src)
{
- safe_strncpy(command_ps, src, maxsize);
+ safe_strncpy(command_ps, src, S.maxsize);
return strlen(command_ps);
}
# if ENABLE_FEATURE_TAB_COMPLETION
strcpy(match_buf, &command[cursor_mb]);
/* where do we want to have cursor after all? */
strcpy(&command[cursor_mb], chosen_match + match_pfx_len);
- len = load_string(command, S.maxsize);
+ len = load_string(command);
/* add match and tail */
sprintf(&command[cursor_mb], "%s%s", chosen_match + match_pfx_len, match_buf);
- command_len = load_string(command, S.maxsize);
+ command_len = load_string(command);
/* write out the matched command */
/* paranoia: load_string can return 0 on conv error,
* prevent passing pos = (0 - 12) to redraw */
{
line_input_t *n = xzalloc(sizeof(*n));
n->flags = flags;
+ n->max_history = MAX_HISTORY;
return n;
}
#if MAX_HISTORY > 0
+unsigned size_from_HISTFILESIZE(const char *hp)
+{
+ int size = MAX_HISTORY;
+ if (hp) {
+ size = atoi(hp);
+ if (size <= 0)
+ return 1;
+ if (size > MAX_HISTORY)
+ return MAX_HISTORY;
+ }
+ return size;
+}
+
static void save_command_ps_at_cur_history(void)
{
if (command_ps[0] != BB_NUL) {
/* fill temp_h[], retaining only last MAX_HISTORY lines */
memset(temp_h, 0, sizeof(temp_h));
- st_parm->cnt_history_in_file = idx = 0;
+ idx = 0;
+ if (!ENABLE_FEATURE_EDITING_SAVE_ON_EXIT)
+ st_parm->cnt_history_in_file = 0;
while ((line = xmalloc_fgetline(fp)) != NULL) {
if (line[0] == '\0') {
free(line);
}
free(temp_h[idx]);
temp_h[idx] = line;
- st_parm->cnt_history_in_file++;
+ if (!ENABLE_FEATURE_EDITING_SAVE_ON_EXIT)
+ st_parm->cnt_history_in_file++;
idx++;
- if (idx == MAX_HISTORY)
+ if (idx == st_parm->max_history)
idx = 0;
}
fclose(fp);
if (st_parm->cnt_history_in_file) {
while (temp_h[idx] == NULL) {
idx++;
- if (idx == MAX_HISTORY)
+ if (idx == st_parm->max_history)
idx = 0;
}
}
/* copy temp_h[] to st_parm->history[] */
- for (i = 0; i < MAX_HISTORY;) {
+ for (i = 0; i < st_parm->max_history;) {
line = temp_h[idx];
if (!line)
break;
idx++;
- if (idx == MAX_HISTORY)
+ if (idx == st_parm->max_history)
idx = 0;
line_len = strlen(line);
if (line_len >= MAX_LINELEN)
st_parm->history[i++] = line;
}
st_parm->cnt_history = i;
+ if (ENABLE_FEATURE_EDITING_SAVE_ON_EXIT)
+ st_parm->cnt_history_in_file = i;
}
}
-/* state->flags is already checked to be nonzero */
+# if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
+void save_history(line_input_t *st)
+{
+ FILE *fp;
+
+ if (!(st->flags & SAVE_HISTORY))
+ return;
+ if (!st->hist_file)
+ return;
+ if (st->cnt_history <= st->cnt_history_in_file)
+ return;
+
+ fp = fopen(st->hist_file, "a");
+ if (fp) {
+ int i, fd;
+ char *new_name;
+ line_input_t *st_temp;
+
+ for (i = st->cnt_history_in_file; i < st->cnt_history; i++)
+ fprintf(fp, "%s\n", st->history[i]);
+ fclose(fp);
+
+ /* we may have concurrently written entries from others.
+ * load them */
+ st_temp = new_line_input_t(st->flags);
+ st_temp->hist_file = st->hist_file;
+ st_temp->max_history = st->max_history;
+ load_history(st_temp);
+
+ /* write out temp file and replace hist_file atomically */
+ new_name = xasprintf("%s.%u.new", st->hist_file, (int) getpid());
+ fd = open(new_name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
+ if (fd >= 0) {
+ fp = xfdopen_for_write(fd);
+ for (i = 0; i < st_temp->cnt_history; i++)
+ fprintf(fp, "%s\n", st_temp->history[i]);
+ fclose(fp);
+ if (rename(new_name, st->hist_file) == 0)
+ st->cnt_history_in_file = st_temp->cnt_history;
+ }
+ free(new_name);
+ free_line_input_t(st_temp);
+ }
+}
+# else
static void save_history(char *str)
{
int fd;
int len, len2;
+ if (!(state->flags & SAVE_HISTORY))
+ return;
+ if (!state->hist_file)
+ return;
+
fd = open(state->hist_file, O_WRONLY | O_CREAT | O_APPEND, 0600);
if (fd < 0)
return;
/* did we write so much that history file needs trimming? */
state->cnt_history_in_file++;
- if (state->cnt_history_in_file > MAX_HISTORY * 4) {
+ if (state->cnt_history_in_file > state->max_history * 4) {
char *new_name;
line_input_t *st_temp;
* load them */
st_temp = new_line_input_t(state->flags);
st_temp->hist_file = state->hist_file;
+ st_temp->max_history = state->max_history;
load_history(st_temp);
/* write out temp file and replace hist_file atomically */
new_name = xasprintf("%s.%u.new", state->hist_file, (int) getpid());
- fd = open(state->hist_file, O_WRONLY | O_CREAT | O_TRUNC, 0600);
+ fd = open(new_name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
if (fd >= 0) {
FILE *fp;
int i;
free_line_input_t(st_temp);
}
}
+# endif
# else
# define load_history(a) ((void)0)
# define save_history(a) ((void)0)
if (i && strcmp(state->history[i-1], str) == 0)
return;
- free(state->history[MAX_HISTORY]); /* redundant, paranoia */
- state->history[MAX_HISTORY] = NULL; /* redundant, paranoia */
+ free(state->history[state->max_history]); /* redundant, paranoia */
+ state->history[state->max_history] = NULL; /* redundant, paranoia */
/* If history[] is full, remove the oldest command */
- /* we need to keep history[MAX_HISTORY] empty, hence >=, not > */
- if (i >= MAX_HISTORY) {
+ /* we need to keep history[state->max_history] empty, hence >=, not > */
+ if (i >= state->max_history) {
free(state->history[0]);
- for (i = 0; i < MAX_HISTORY-1; i++)
+ for (i = 0; i < state->max_history-1; i++)
state->history[i] = state->history[i+1];
- /* i == MAX_HISTORY-1 */
+ /* i == state->max_history-1 */
+ if (ENABLE_FEATURE_EDITING_SAVE_ON_EXIT && state->cnt_history_in_file)
+ state->cnt_history_in_file--;
}
- /* i <= MAX_HISTORY-1 */
+ /* i <= state->max_history-1 */
state->history[i++] = xstrdup(str);
- /* i <= MAX_HISTORY */
+ /* i <= state->max_history */
state->cur_history = i;
state->cnt_history = i;
-# if MAX_HISTORY > 0 && ENABLE_FEATURE_EDITING_SAVEHISTORY
- if ((state->flags & SAVE_HISTORY) && state->hist_file)
- save_history(str);
+# if ENABLE_FEATURE_EDITING_SAVEHISTORY && !ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
+ save_history(str);
# endif
IF_FEATURE_EDITING_FANCY_PROMPT(num_ok_lines++;)
}
* write(1, "~/srcdevel/bbox/fix/busybox.t4 # ", 33) = 33
* poll([{fd=0, events=POLLIN}], 1, 0) = 0 (Timeout) <-- no input exists
* write(1, "\33[6n", 4) = 4 <-- send the ESC sequence, quick!
- * poll([{fd=0, events=POLLIN}], 1, 4294967295) = 1 ([{fd=0, revents=POLLIN}])
+ * poll([{fd=0, events=POLLIN}], 1, -1) = 1 ([{fd=0, revents=POLLIN}])
* read(0, "\n", 1) = 1 <-- oh crap, user's input got in first
*/
struct pollfd pfd;
{
int sv_errno = errno;
unsigned width;
+
get_terminal_width_height(0, &width, NULL);
- cmdedit_setwidth(width, nsig /* - just a yes/no flag */);
- if (nsig == SIGWINCH)
- signal(SIGWINCH, win_changed); /* rearm ourself */
+//FIXME: cmdedit_setwidth() -> redraw() -> printf() -> KABOOM! (we are in signal handler!)
+ cmdedit_setwidth(width, /*redraw_flg:*/ nsig);
+
errno = sv_errno;
}
-static int lineedit_read_key(char *read_key_buffer)
+static int lineedit_read_key(char *read_key_buffer, int timeout)
{
int64_t ic;
- int timeout = -1;
#if ENABLE_UNICODE_SUPPORT
char unicode_buf[MB_CUR_MAX + 1];
int unicode_idx = 0;
#undef CTRL
#define CTRL(a) ((a) & ~0x40)
+enum {
+ VI_CMDMODE_BIT = 0x40000000,
+ /* 0x80000000 bit flags KEYCODE_xxx */
+};
+
+#if ENABLE_FEATURE_REVERSE_SEARCH
+/* Mimic readline Ctrl-R reverse history search.
+ * When invoked, it shows the following prompt:
+ * (reverse-i-search)'': user_input [cursor pos unchanged by Ctrl-R]
+ * and typing results in search being performed:
+ * (reverse-i-search)'tmp': cd /tmp [cursor under t in /tmp]
+ * Search is performed by looking at progressively older lines in history.
+ * Ctrl-R again searches for the next match in history.
+ * Backspace deletes last matched char.
+ * Control keys exit search and return to normal editing (at current history line).
+ */
+static int32_t reverse_i_search(void)
+{
+ char match_buf[128]; /* for user input */
+ char read_key_buffer[KEYCODE_BUFFER_SIZE];
+ const char *matched_history_line;
+ const char *saved_prompt;
+ int32_t ic;
+
+ matched_history_line = NULL;
+ read_key_buffer[0] = 0;
+ match_buf[0] = '\0';
+
+ /* Save and replace the prompt */
+ saved_prompt = cmdedit_prompt;
+ goto set_prompt;
+
+ while (1) {
+ int h;
+ unsigned match_buf_len = strlen(match_buf);
+
+ fflush_all();
+//FIXME: correct timeout?
+ ic = lineedit_read_key(read_key_buffer, -1);
+
+ switch (ic) {
+ case CTRL('R'): /* searching for the next match */
+ break;
+
+ case '\b':
+ case '\x7f':
+ /* Backspace */
+ if (unicode_status == UNICODE_ON) {
+ while (match_buf_len != 0) {
+ uint8_t c = match_buf[--match_buf_len];
+ if ((c & 0xc0) != 0x80) /* start of UTF-8 char? */
+ break; /* yes */
+ }
+ } else {
+ if (match_buf_len != 0)
+ match_buf_len--;
+ }
+ match_buf[match_buf_len] = '\0';
+ break;
+
+ default:
+ if (ic < ' '
+ || (!ENABLE_UNICODE_SUPPORT && ic >= 256)
+ || (ENABLE_UNICODE_SUPPORT && ic >= VI_CMDMODE_BIT)
+ ) {
+ goto ret;
+ }
+
+ /* Append this char */
+#if ENABLE_UNICODE_SUPPORT
+ if (unicode_status == UNICODE_ON) {
+ mbstate_t mbstate = { 0 };
+ char buf[MB_CUR_MAX + 1];
+ int len = wcrtomb(buf, ic, &mbstate);
+ if (len > 0) {
+ buf[len] = '\0';
+ if (match_buf_len + len < sizeof(match_buf))
+ strcpy(match_buf + match_buf_len, buf);
+ }
+ } else
+#endif
+ if (match_buf_len < sizeof(match_buf) - 1) {
+ match_buf[match_buf_len] = ic;
+ match_buf[match_buf_len + 1] = '\0';
+ }
+ break;
+ } /* switch (ic) */
+
+ /* Search in history for match_buf */
+ h = state->cur_history;
+ if (ic == CTRL('R'))
+ h--;
+ while (h >= 0) {
+ if (state->history[h]) {
+ char *match = strstr(state->history[h], match_buf);
+ if (match) {
+ state->cur_history = h;
+ matched_history_line = state->history[h];
+ command_len = load_string(matched_history_line);
+ cursor = match - matched_history_line;
+//FIXME: cursor position for Unicode case
+
+ free((char*)cmdedit_prompt);
+ set_prompt:
+ cmdedit_prompt = xasprintf("(reverse-i-search)'%s': ", match_buf);
+ cmdedit_prmt_len = strlen(cmdedit_prompt);
+ goto do_redraw;
+ }
+ }
+ h--;
+ }
+
+ /* Not found */
+ match_buf[match_buf_len] = '\0';
+ beep();
+ continue;
+
+ do_redraw:
+ redraw(cmdedit_y, command_len - cursor);
+ } /* while (1) */
+
+ ret:
+ if (matched_history_line)
+ command_len = load_string(matched_history_line);
+
+ free((char*)cmdedit_prompt);
+ cmdedit_prompt = saved_prompt;
+ cmdedit_prmt_len = strlen(cmdedit_prompt);
+ redraw(cmdedit_y, command_len - cursor);
+
+ return ic;
+}
+#endif
+
/* maxsize must be >= 2.
* Returns:
* -1 on read errors or EOF, or on bare Ctrl-D,
* 0 on ctrl-C (the line entered is still returned in 'command'),
* >0 length of input string, including terminating '\n'
*/
-int FAST_FUNC read_line_input(const char *prompt, char *command, int maxsize, line_input_t *st)
+int FAST_FUNC read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout)
{
int len;
#if ENABLE_FEATURE_TAB_COMPLETION
maxsize = MAX_LINELEN;
S.maxsize = maxsize;
- /* With null flags, no other fields are ever used */
+ /* With zero flags, no other fields are ever used */
state = st ? st : (line_input_t*) &const_int_0;
#if MAX_HISTORY > 0
# if ENABLE_FEATURE_EDITING_SAVEHISTORY
new_settings.c_cc[VMIN] = 1;
new_settings.c_cc[VTIME] = 0;
/* Turn off CTRL-C, so we can trap it */
-#ifndef _POSIX_VDISABLE
-# define _POSIX_VDISABLE '\0'
-#endif
new_settings.c_cc[VINTR] = _POSIX_VDISABLE;
tcsetattr_stdin_TCSANOW(&new_settings);
- /* Now initialize things */
- previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
- win_changed(0); /* do initial resizing */
#if ENABLE_USERNAME_OR_HOMEDIR
{
struct passwd *entry;
#endif
#if 0
- for (i = 0; i <= MAX_HISTORY; i++)
+ for (i = 0; i <= state->max_history; i++)
bb_error_msg("history[%d]:'%s'", i, state->history[i]);
bb_error_msg("cur_history:%d cnt_history:%d", state->cur_history, state->cnt_history);
#endif
parse_and_put_prompt(prompt);
ask_terminal();
+ /* Install window resize handler (NB: after *all* init is complete) */
+//FIXME: save entire sigaction!
+ previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
+ win_changed(0); /* get initial window size */
+
read_key_buffer[0] = 0;
while (1) {
/*
* clutters the big switch a bit, but keeps all the code
* in one place.
*/
- enum {
- VI_CMDMODE_BIT = 0x40000000,
- /* 0x80000000 bit flags KEYCODE_xxx */
- };
int32_t ic, ic_raw;
fflush_all();
- ic = ic_raw = lineedit_read_key(read_key_buffer);
+ ic = ic_raw = lineedit_read_key(read_key_buffer, timeout);
+#if ENABLE_FEATURE_REVERSE_SEARCH
+ again:
+#endif
#if ENABLE_FEATURE_EDITING_VI
newdelflag = 1;
if (vi_cmdmode) {
while (cursor > 0 && !BB_isspace(command_ps[cursor-1]))
input_backspace();
break;
+#if ENABLE_FEATURE_REVERSE_SEARCH
+ case CTRL('R'):
+ ic = ic_raw = reverse_i_search();
+ goto again;
+#endif
#if ENABLE_FEATURE_EDITING_VI
case 'i'|VI_CMDMODE_BIT:
case 'd'|VI_CMDMODE_BIT: {
int nc, sc;
- ic = lineedit_read_key(read_key_buffer);
+ ic = lineedit_read_key(read_key_buffer, timeout);
if (errno) /* error */
goto return_error_indicator;
if (ic == ic_raw) { /* "cc", "dd" */
break;
case 'r'|VI_CMDMODE_BIT:
//FIXME: unicode case?
- ic = lineedit_read_key(read_key_buffer);
+ ic = lineedit_read_key(read_key_buffer, timeout);
if (errno) /* error */
goto return_error_indicator;
if (ic < ' ' || ic > 255) {
/* Rewrite the line with the selected history item */
/* change command */
command_len = load_string(state->history[state->cur_history] ?
- state->history[state->cur_history] : "", maxsize);
+ state->history[state->cur_history] : "");
/* redraw and go to eol (bol, in vi) */
redraw(cmdedit_y, (state->flags & VI_MODE) ? 9999 : 0);
break;
projects / oweals / busybox.git / blobdiff