source: MondoRescue/branches/stable/mindi-busybox/libbb/lineedit.c

/* vi: set sw=4 ts=4: */
/*
 * Termios command line History and Editing.
 *
 * Copyright (c) 1986-2003 may safely be consumed by a BSD or GPL license.
 * Written by:   Vladimir Oleynik <dzo@simtreas.ru>
 *
 * Used ideas:
 *      Adam Rogoyski    <rogoyski@cs.utexas.edu>
 *      Dave Cinege      <dcinege@psychosis.com>
 *      Jakub Jelinek (c) 1995
 *      Erik Andersen    <andersen@codepoet.org> (Majorly adjusted for busybox)
 *
 * This code is 'as is' with no warranty.
 */

/*
   Usage and known bugs:
   Terminal key codes are not extensive, and more will probably
   need to be added. This version was created on Debian GNU/Linux 2.x.
   Delete, Backspace, Home, End, and the arrow keys were tested
   to work in an Xterm and console. Ctrl-A also works as Home.
   Ctrl-E also works as End.

   Small bugs (simple effect):
   - not true viewing if terminal size (x*y symbols) less
     size (prompt + editor's line + 2 symbols)
   - not true viewing if length prompt less terminal width
 */

#include "libbb.h"


/* FIXME: obsolete CONFIG item? */
#define ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT 0


#ifdef TEST

#define ENABLE_FEATURE_EDITING 0
#define ENABLE_FEATURE_TAB_COMPLETION 0
#define ENABLE_FEATURE_USERNAME_COMPLETION 0
#define ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT 0
#define ENABLE_FEATURE_CLEAN_UP 0

#endif  /* TEST */


/* Entire file (except TESTing part) sits inside this #if */
#if ENABLE_FEATURE_EDITING

#if ENABLE_LOCALE_SUPPORT
#define Isprint(c) isprint(c)
#else
#define Isprint(c) ((c) >= ' ' && (c) != ((unsigned char)'\233'))
#endif

#define ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR \
(ENABLE_FEATURE_USERNAME_COMPLETION || ENABLE_FEATURE_EDITING_FANCY_PROMPT)

enum { MAX_LINELEN = CONFIG_FEATURE_EDITING_MAX_LEN };

static line_input_t *state;

static struct termios initial_settings, new_settings;

static volatile unsigned cmdedit_termw = 80;        /* actual terminal width */

static int cmdedit_x;           /* real x terminal position */
static int cmdedit_y;           /* pseudoreal y terminal position */
static int cmdedit_prmt_len;    /* length of prompt (without colors etc) */

static unsigned cursor;
static unsigned command_len;
static char *command_ps;
static const char *cmdedit_prompt;

#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
static char *hostname_buf;
static int num_ok_lines = 1;
#endif

#if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
static const char null_str[] = "";
static char *user_buf;
static char *home_pwd_buf = (char*)null_str;
#endif

/* Put 'command_ps[cursor]', cursor++.
 * Advance cursor on screen. If we reached right margin, scroll text up
 * and remove terminal margin effect by printing 'next_char' */
static void cmdedit_set_out_char(int next_char)
{
    int c = (unsigned char)command_ps[cursor];

    if (c == '\0') {
        /* erase character after end of input string */
        c = ' ';
    }
#if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
    /* Display non-printable characters in reverse */
    if (!Isprint(c)) {
        if (c >= 128)
            c -= 128;
        if (c < ' ')
            c += '@';
        if (c == 127)
            c = '?';
        printf("\033[7m%c\033[0m", c);
    } else
#endif
    {
        if (initial_settings.c_lflag & ECHO)
            putchar(c);
    }
    if (++cmdedit_x >= cmdedit_termw) {
        /* terminal is scrolled down */
        cmdedit_y++;
        cmdedit_x = 0;
        /* destroy "(auto)margin" */
        putchar(next_char);
        putchar('\b');
    }
// Huh? What if command_ps[cursor] == '\0' (we are at the end already?)
    cursor++;
}

/* Move to end of line (by printing all chars till the end) */
static void input_end(void)
{
    while (cursor < command_len)
        cmdedit_set_out_char(' ');
}

/* Go to the next line */
static void goto_new_line(void)
{
    input_end();
    if (cmdedit_x)
        putchar('\n');
}


static void out1str(const char *s)
{
    if (s)
        fputs(s, stdout);
}

static void beep(void)
{
    putchar('\007');
}

/* Move back one character */
/* (optimized for slow terminals) */
static void input_backward(unsigned num)
{
    int count_y;

    if (num > cursor)
        num = cursor;
    if (!num)
        return;
    cursor -= num;

    if (cmdedit_x >= num) {
        cmdedit_x -= num;
        if (num <= 4) {
            printf("\b\b\b\b" + (4-num));
            return;
        }
        printf("\033[%uD", num);
        return;
    }

    /* Need to go one or more lines up */
    num -= cmdedit_x;
    count_y = 1 + (num / cmdedit_termw);
    cmdedit_y -= count_y;
    cmdedit_x = cmdedit_termw * count_y - num;
    /* go to 1st column; go up; go to correct column */
    printf("\r" "\033[%dA" "\033[%dC", count_y, cmdedit_x);
}

static void put_prompt(void)
{
    out1str(cmdedit_prompt);
    cmdedit_x = cmdedit_prmt_len;
    cursor = 0;
// Huh? what if cmdedit_prmt_len >= width?
    cmdedit_y = 0;                  /* new quasireal y */
}

/* draw prompt, editor line, and clear tail */
static void redraw(int y, int back_cursor)
{
    if (y > 0)                              /* up to start y */
        printf("\033[%dA", y);
    putchar('\r');
    put_prompt();
    input_end();                            /* rewrite */
    printf("\033[J");                       /* erase after cursor */
    input_backward(back_cursor);
}

#if ENABLE_FEATURE_EDITING_VI
#define DELBUFSIZ 128
static char *delbuf;  /* a (malloced) place to store deleted characters */
static char *delp;
static char newdelflag;      /* whether delbuf should be reused yet */
#endif

/* Delete the char in front of the cursor, optionally saving it
 * for later putback */
static void input_delete(int save)
{
    int j = cursor;

    if (j == command_len)
        return;

#if ENABLE_FEATURE_EDITING_VI
    if (save) {
        if (newdelflag) {
            if (!delbuf)
                delbuf = malloc(DELBUFSIZ);
            /* safe if malloc fails */
            delp = delbuf;
            newdelflag = 0;
        }
        if (delbuf && (delp - delbuf < DELBUFSIZ))
            *delp++ = command_ps[j];
    }
#endif

    strcpy(command_ps + j, command_ps + j + 1);
    command_len--;
    input_end();                    /* rewrite new line */
    cmdedit_set_out_char(' ');      /* erase char */
    input_backward(cursor - j);     /* back to old pos cursor */
}

#if ENABLE_FEATURE_EDITING_VI
static void put(void)
{
    int ocursor;
    int j = delp - delbuf;

    if (j == 0)
        return;
    ocursor = cursor;
    /* open hole and then fill it */
    memmove(command_ps + cursor + j, command_ps + cursor, command_len - cursor + 1);
    strncpy(command_ps + cursor, delbuf, j);
    command_len += j;
    input_end();                    /* rewrite new line */
    input_backward(cursor - ocursor - j + 1); /* at end of new text */
}
#endif

/* Delete the char in back of the cursor */
static void input_backspace(void)
{
    if (cursor > 0) {
        input_backward(1);
        input_delete(0);
    }
}

/* Move forward one character */
static void input_forward(void)
{
    if (cursor < command_len)
        cmdedit_set_out_char(command_ps[cursor + 1]);
}


#if ENABLE_FEATURE_TAB_COMPLETION

static char **matches;
static unsigned num_matches;

static void free_tab_completion_data(void)
{
    if (matches) {
        while (num_matches)
            free(matches[--num_matches]);
        free(matches);
        matches = NULL;
    }
}

static void add_match(char *matched)
{
    int nm = num_matches;
    int nm1 = nm + 1;

    matches = xrealloc(matches, nm1 * sizeof(char *));
    matches[nm] = matched;
    num_matches++;
}

#if ENABLE_FEATURE_USERNAME_COMPLETION
static void username_tab_completion(char *ud, char *with_shash_flg)
{
    struct passwd *entry;
    int userlen;

    ud++;                           /* ~user/... to user/... */
    userlen = strlen(ud);

    if (with_shash_flg) {           /* "~/..." or "~user/..." */
        char *sav_ud = ud - 1;
        char *home = NULL;
        char *temp;

        if (*ud == '/') {       /* "~/..."     */
            home = home_pwd_buf;
        } else {
            /* "~user/..." */
            temp = strchr(ud, '/');
            *temp = 0;              /* ~user\0 */
            entry = getpwnam(ud);
            *temp = '/';            /* restore ~user/... */
            ud = temp;
            if (entry)
                home = entry->pw_dir;
        }
        if (home) {
            if ((userlen + strlen(home) + 1) < MAX_LINELEN) {
                char temp2[MAX_LINELEN];     /* argument size */

                /* /home/user/... */
                sprintf(temp2, "%s%s", home, ud);
                strcpy(sav_ud, temp2);
            }
        }
    } else {
        /* "~[^/]*" */
        /* Using _r function to avoid pulling in static buffers */
        char line_buff[256];
        struct passwd pwd;
        struct passwd *result;

        setpwent();
        while (!getpwent_r(&pwd, line_buff, sizeof(line_buff), &result)) {
            /* Null usernames should result in all users as possible completions. */
            if (/*!userlen || */ strncmp(ud, pwd.pw_name, userlen) == 0) {
                add_match(xasprintf("~%s/", pwd.pw_name));
            }
        }
        endpwent();
    }
}
#endif  /* FEATURE_COMMAND_USERNAME_COMPLETION */

enum {
    FIND_EXE_ONLY = 0,
    FIND_DIR_ONLY = 1,
    FIND_FILE_ONLY = 2,
};

static int path_parse(char ***p, int flags)
{
    int npth;
    const char *pth;
    char *tmp;
    char **res;

    /* if not setenv PATH variable, to search cur dir "." */
    if (flags != FIND_EXE_ONLY)
        return 1;

    if (state->flags & WITH_PATH_LOOKUP)
        pth = state->path_lookup;
    else
        pth = getenv("PATH");
    /* PATH=<empty> or PATH=:<empty> */
    if (!pth || !pth[0] || LONE_CHAR(pth, ':'))
        return 1;

    tmp = (char*)pth;
    npth = 1; /* path component count */
    while (1) {
        tmp = strchr(tmp, ':');
        if (!tmp)
            break;
        if (*++tmp == '\0')
            break;  /* :<empty> */
        npth++;
    }

    res = xmalloc(npth * sizeof(char*));
    res[0] = tmp = xstrdup(pth);
    npth = 1;
    while (1) {
        tmp = strchr(tmp, ':');
        if (!tmp)
            break;
        *tmp++ = '\0'; /* ':' -> '\0' */
        if (*tmp == '\0')
            break; /* :<empty> */
        res[npth++] = tmp;
    }
    *p = res;
    return npth;
}

static void exe_n_cwd_tab_completion(char *command, int type)
{
    DIR *dir;
    struct dirent *next;
    char dirbuf[MAX_LINELEN];
    struct stat st;
    char *path1[1];
    char **paths = path1;
    int npaths;
    int i;
    char *found;
    char *pfind = strrchr(command, '/');

    npaths = 1;
    path1[0] = (char*)".";

    if (pfind == NULL) {
        /* no dir, if flags==EXE_ONLY - get paths, else "." */
        npaths = path_parse(&paths, type);
        pfind = command;
    } else {
        /* dirbuf = ".../.../.../" */
        safe_strncpy(dirbuf, command, (pfind - command) + 2);
#if ENABLE_FEATURE_USERNAME_COMPLETION
        if (dirbuf[0] == '~')   /* ~/... or ~user/... */
            username_tab_completion(dirbuf, dirbuf);
#endif
        paths[0] = dirbuf;
        /* point to 'l' in "..../last_component" */
        pfind++;
    }

    for (i = 0; i < npaths; i++) {
        dir = opendir(paths[i]);
        if (!dir)                       /* Don't print an error */
            continue;

        while ((next = readdir(dir)) != NULL) {
            int len1;
            const char *str_found = next->d_name;

            /* matched? */
            if (strncmp(str_found, pfind, strlen(pfind)))
                continue;
            /* not see .name without .match */
            if (*str_found == '.' && *pfind == 0) {
                if (NOT_LONE_CHAR(paths[i], '/') || str_found[1])
                    continue;
                str_found = ""; /* only "/" */
            }
            found = concat_path_file(paths[i], str_found);
            /* hmm, remover in progress? */
            if (stat(found, &st) < 0)
                goto cont;
            /* find with dirs? */
            if (paths[i] != dirbuf)
                strcpy(found, next->d_name);    /* only name */

            len1 = strlen(found);
            found = xrealloc(found, len1 + 2);
            found[len1] = '\0';
            found[len1+1] = '\0';

            if (S_ISDIR(st.st_mode)) {
                /* name is directory      */
                if (found[len1-1] != '/') {
                    found[len1] = '/';
                }
            } else {
                /* not put found file if search only dirs for cd */
                if (type == FIND_DIR_ONLY)
                    goto cont;
            }
            /* Add it to the list */
            add_match(found);
            continue;
 cont:
            free(found);
        }
        closedir(dir);
    }
    if (paths != path1) {
        free(paths[0]);                 /* allocated memory only in first member */
        free(paths);
    }
}

#define QUOT (UCHAR_MAX+1)

#define collapse_pos(is, in) { \
    memmove(int_buf+(is), int_buf+(in), (MAX_LINELEN+1-(is)-(in))*sizeof(int)); \
    memmove(pos_buf+(is), pos_buf+(in), (MAX_LINELEN+1-(is)-(in))*sizeof(int)); }

static int find_match(char *matchBuf, int *len_with_quotes)
{
    int i, j;
    int command_mode;
    int c, c2;
    int int_buf[MAX_LINELEN + 1];
    int pos_buf[MAX_LINELEN + 1];

    /* set to integer dimension characters and own positions */
    for (i = 0;; i++) {
        int_buf[i] = (unsigned char)matchBuf[i];
        if (int_buf[i] == 0) {
            pos_buf[i] = -1;        /* indicator end line */
            break;
        }
        pos_buf[i] = i;
    }

    /* mask \+symbol and convert '\t' to ' ' */
    for (i = j = 0; matchBuf[i]; i++, j++)
        if (matchBuf[i] == '\\') {
            collapse_pos(j, j + 1);
            int_buf[j] |= QUOT;
            i++;
#if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
            if (matchBuf[i] == '\t')        /* algorithm equivalent */
                int_buf[j] = ' ' | QUOT;
#endif
        }
#if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
        else if (matchBuf[i] == '\t')
            int_buf[j] = ' ';
#endif

    /* mask "symbols" or 'symbols' */
    c2 = 0;
    for (i = 0; int_buf[i]; i++) {
        c = int_buf[i];
        if (c == '\'' || c == '"') {
            if (c2 == 0)
                c2 = c;
            else {
                if (c == c2)
                    c2 = 0;
                else
                    int_buf[i] |= QUOT;
            }
        } else if (c2 != 0 && c != '$')
            int_buf[i] |= QUOT;
    }

    /* skip commands with arguments if line has commands delimiters */
    /* ';' ';;' '&' '|' '&&' '||' but `>&' `<&' `>|' */
    for (i = 0; int_buf[i]; i++) {
        c = int_buf[i];
        c2 = int_buf[i + 1];
        j = i ? int_buf[i - 1] : -1;
        command_mode = 0;
        if (c == ';' || c == '&' || c == '|') {
            command_mode = 1 + (c == c2);
            if (c == '&') {
                if (j == '>' || j == '<')
                    command_mode = 0;
            } else if (c == '|' && j == '>')
                command_mode = 0;
        }
        if (command_mode) {
            collapse_pos(0, i + command_mode);
            i = -1;                         /* hack incremet */
        }
    }
    /* collapse `command...` */
    for (i = 0; int_buf[i]; i++)
        if (int_buf[i] == '`') {
            for (j = i + 1; int_buf[j]; j++)
                if (int_buf[j] == '`') {
                    collapse_pos(i, j + 1);
                    j = 0;
                    break;
                }
            if (j) {
                /* not found close ` - command mode, collapse all previous */
                collapse_pos(0, i + 1);
                break;
            } else
                i--;                    /* hack incremet */
        }

    /* collapse (command...(command...)...) or {command...{command...}...} */
    c = 0;                                          /* "recursive" level */
    c2 = 0;
    for (i = 0; int_buf[i]; i++)
        if (int_buf[i] == '(' || int_buf[i] == '{') {
            if (int_buf[i] == '(')
                c++;
            else
                c2++;
            collapse_pos(0, i + 1);
            i = -1;                         /* hack incremet */
        }
    for (i = 0; pos_buf[i] >= 0 && (c > 0 || c2 > 0); i++)
        if ((int_buf[i] == ')' && c > 0) || (int_buf[i] == '}' && c2 > 0)) {
            if (int_buf[i] == ')')
                c--;
            else
                c2--;
            collapse_pos(0, i + 1);
            i = -1;                         /* hack incremet */
        }

    /* skip first not quote space */
    for (i = 0; int_buf[i]; i++)
        if (int_buf[i] != ' ')
            break;
    if (i)
        collapse_pos(0, i);

    /* set find mode for completion */
    command_mode = FIND_EXE_ONLY;
    for (i = 0; int_buf[i]; i++)
        if (int_buf[i] == ' ' || int_buf[i] == '<' || int_buf[i] == '>') {
            if (int_buf[i] == ' ' && command_mode == FIND_EXE_ONLY
             && matchBuf[pos_buf[0]]=='c'
             && matchBuf[pos_buf[1]]=='d'
            ) {
                command_mode = FIND_DIR_ONLY;
            } else {
                command_mode = FIND_FILE_ONLY;
                break;
            }
        }
    for (i = 0; int_buf[i]; i++)
        /* "strlen" */;
    /* find last word */
    for (--i; i >= 0; i--) {
        c = int_buf[i];
        if (c == ' ' || c == '<' || c == '>' || c == '|' || c == '&') {
            collapse_pos(0, i + 1);
            break;
        }
    }
    /* skip first not quoted '\'' or '"' */
    for (i = 0; int_buf[i] == '\'' || int_buf[i] == '"'; i++)
        /*skip*/;
    /* collapse quote or unquote // or /~ */
    while ((int_buf[i] & ~QUOT) == '/'
     && ((int_buf[i+1] & ~QUOT) == '/' || (int_buf[i+1] & ~QUOT) == '~')
    ) {
        i++;
    }

    /* set only match and destroy quotes */
    j = 0;
    for (c = 0; pos_buf[i] >= 0; i++) {
        matchBuf[c++] = matchBuf[pos_buf[i]];
        j = pos_buf[i] + 1;
    }
    matchBuf[c] = 0;
    /* old lenght matchBuf with quotes symbols */
    *len_with_quotes = j ? j - pos_buf[0] : 0;

    return command_mode;
}

/*
 * display by column (original idea from ls applet,
 * very optimized by me :)
 */
static void showfiles(void)
{
    int ncols, row;
    int column_width = 0;
    int nfiles = num_matches;
    int nrows = nfiles;
    int l;

    /* find the longest file name-  use that as the column width */
    for (row = 0; row < nrows; row++) {
        l = strlen(matches[row]);
        if (column_width < l)
            column_width = l;
    }
    column_width += 2;              /* min space for columns */
    ncols = cmdedit_termw / column_width;

    if (ncols > 1) {
        nrows /= ncols;
        if (nfiles % ncols)
            nrows++;        /* round up fractionals */
    } else {
        ncols = 1;
    }
    for (row = 0; row < nrows; row++) {
        int n = row;
        int nc;

        for (nc = 1; nc < ncols && n+nrows < nfiles; n += nrows, nc++) {
            printf("%s%-*s", matches[n],
                (int)(column_width - strlen(matches[n])), "");
        }
        printf("%s\n", matches[n]);
    }
}

static char *add_quote_for_spec_chars(char *found)
{
    int l = 0;
    char *s = xmalloc((strlen(found) + 1) * 2);

    while (*found) {
        if (strchr(" `\"#$%^&*()=+{}[]:;\'|\\<>", *found))
            s[l++] = '\\';
        s[l++] = *found++;
    }
    s[l] = 0;
    return s;
}

static int match_compare(const void *a, const void *b)
{
    return strcmp(*(char**)a, *(char**)b);
}

/* Do TAB completion */
static void input_tab(int *lastWasTab)
{
    if (!(state->flags & TAB_COMPLETION))
        return;

    if (!*lastWasTab) {
        char *tmp, *tmp1;
        int len_found;
        char matchBuf[MAX_LINELEN];
        int find_type;
        int recalc_pos;

        *lastWasTab = TRUE;             /* flop trigger */

        /* Make a local copy of the string -- up
         * to the position of the cursor */
        tmp = strncpy(matchBuf, command_ps, cursor);
        tmp[cursor] = '\0';

        find_type = find_match(matchBuf, &recalc_pos);

        /* Free up any memory already allocated */
        free_tab_completion_data();

#if ENABLE_FEATURE_USERNAME_COMPLETION
        /* If the word starts with `~' and there is no slash in the word,
         * then try completing this word as a username. */
        if (state->flags & USERNAME_COMPLETION)
            if (matchBuf[0] == '~' && strchr(matchBuf, '/') == 0)
                username_tab_completion(matchBuf, NULL);
#endif
        /* Try to match any executable in our path and everything
         * in the current working directory */
        if (!matches)
            exe_n_cwd_tab_completion(matchBuf, find_type);
        /* Sort, then remove any duplicates found */
        if (matches) {
            int i, n = 0;
            qsort(matches, num_matches, sizeof(char*), match_compare);
            for (i = 0; i < num_matches - 1; ++i) {
                if (matches[i] && matches[i+1]) { /* paranoia */
                    if (strcmp(matches[i], matches[i+1]) == 0) {
                        free(matches[i]);
                        matches[i] = NULL; /* paranoia */
                    } else {
                        matches[n++] = matches[i];
                    }
                }
            }
            matches[n] = matches[i];
            num_matches = n + 1;
        }
        /* Did we find exactly one match? */
        if (!matches || num_matches > 1) {
            beep();
            if (!matches)
                return;         /* not found */
            /* find minimal match */
        // ash: yet another failure in trying to achieve "we don't die on OOM"
            tmp1 = xstrdup(matches[0]);
            for (tmp = tmp1; *tmp; tmp++)
                for (len_found = 1; len_found < num_matches; len_found++)
                    if (matches[len_found][(tmp - tmp1)] != *tmp) {
                        *tmp = '\0';
                        break;
                    }
            if (*tmp1 == '\0') {        /* have unique */
                free(tmp1);
                return;
            }
            tmp = add_quote_for_spec_chars(tmp1);
            free(tmp1);
        } else {                        /* one match */
            tmp = add_quote_for_spec_chars(matches[0]);
            /* for next completion current found */
            *lastWasTab = FALSE;

            len_found = strlen(tmp);
            if (tmp[len_found-1] != '/') {
                tmp[len_found] = ' ';
                tmp[len_found+1] = '\0';
            }
        }
        len_found = strlen(tmp);
        /* have space to placed match? */
        if ((len_found - strlen(matchBuf) + command_len) < MAX_LINELEN) {
            /* before word for match   */
            command_ps[cursor - recalc_pos] = 0;
            /* save   tail line        */
            strcpy(matchBuf, command_ps + cursor);
            /* add    match            */
            strcat(command_ps, tmp);
            /* add    tail             */
            strcat(command_ps, matchBuf);
            /* back to begin word for match    */
            input_backward(recalc_pos);
            /* new pos                         */
            recalc_pos = cursor + len_found;
            /* new len                         */
            command_len = strlen(command_ps);
            /* write out the matched command   */
            redraw(cmdedit_y, command_len - recalc_pos);
        }
        free(tmp);
    } else {
        /* Ok -- the last char was a TAB.  Since they
         * just hit TAB again, print a list of all the
         * available choices... */
        if (matches && num_matches > 0) {
            int sav_cursor = cursor;        /* change goto_new_line() */

            /* Go to the next line */
            goto_new_line();
            showfiles();
            redraw(0, command_len - sav_cursor);
        }
    }
}

#else
#define input_tab(a) ((void)0)
#endif  /* FEATURE_COMMAND_TAB_COMPLETION */


#if MAX_HISTORY > 0

/* state->flags is already checked to be nonzero */
static void get_previous_history(void)
{
    if (command_ps[0] != '\0' || state->history[state->cur_history] == NULL) {
        free(state->history[state->cur_history]);
        state->history[state->cur_history] = xstrdup(command_ps);
    }
    state->cur_history--;
}

static int get_next_history(void)
{
    if (state->flags & DO_HISTORY) {
        int ch = state->cur_history;
        if (ch < state->cnt_history) {
            get_previous_history(); /* save the current history line */
            state->cur_history = ch + 1;
            return state->cur_history;
        }
    }
    beep();
    return 0;
}

#if ENABLE_FEATURE_EDITING_SAVEHISTORY
/* state->flags is already checked to be nonzero */
static void load_history(const char *fromfile)
{
    FILE *fp;
    int hi;

    /* cleanup old */
    for (hi = state->cnt_history; hi > 0;) {
        hi--;
        free(state->history[hi]);
    }

    fp = fopen(fromfile, "r");
    if (fp) {
        for (hi = 0; hi < MAX_HISTORY;) {
            char *hl = xmalloc_getline(fp);
            int l;

            if (!hl)
                break;
            l = strlen(hl);
            if (l >= MAX_LINELEN)
                hl[MAX_LINELEN-1] = '\0';
            if (l == 0 || hl[0] == ' ') {
                free(hl);
                continue;
            }
            state->history[hi++] = hl;
        }
        fclose(fp);
    }
    state->cur_history = state->cnt_history = hi;
}

/* state->flags is already checked to be nonzero */
static void save_history(const char *tofile)
{
    FILE *fp;

    fp = fopen(tofile, "w");
    if (fp) {
        int i;

        for (i = 0; i < state->cnt_history; i++) {
            fprintf(fp, "%s\n", state->history[i]);
        }
        fclose(fp);
    }
}
#else
#define load_history(a) ((void)0)
#define save_history(a) ((void)0)
#endif /* FEATURE_COMMAND_SAVEHISTORY */

static void remember_in_history(const char *str)
{
    int i;

    if (!(state->flags & DO_HISTORY))
        return;

    i = state->cnt_history;
    free(state->history[MAX_HISTORY]);
    state->history[MAX_HISTORY] = NULL;
    /* After max history, remove the oldest command */
    if (i >= MAX_HISTORY) {
        free(state->history[0]);
        for (i = 0; i < MAX_HISTORY-1; i++)
            state->history[i] = state->history[i+1];
    }
// Maybe "if (!i || strcmp(history[i-1], command) != 0) ..."
// (i.e. do not save dups?)
    state->history[i++] = xstrdup(str);
    state->cur_history = i;
    state->cnt_history = i;
#if ENABLE_FEATURE_EDITING_SAVEHISTORY
    if ((state->flags & SAVE_HISTORY) && state->hist_file)
        save_history(state->hist_file);
#endif
    USE_FEATURE_EDITING_FANCY_PROMPT(num_ok_lines++;)
}

#else /* MAX_HISTORY == 0 */
#define remember_in_history(a) ((void)0)
#endif /* MAX_HISTORY */


/*
 * This function is used to grab a character buffer
 * from the input file descriptor and allows you to
 * a string with full command editing (sort of like
 * a mini readline).
 *
 * The following standard commands are not implemented:
 * ESC-b -- Move back one word
 * ESC-f -- Move forward one word
 * ESC-d -- Delete back one word
 * ESC-h -- Delete forward one word
 * CTL-t -- Transpose two characters
 *
 * Minimalist vi-style command line editing available if configured.
 * vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
 */

#if ENABLE_FEATURE_EDITING_VI
static void
vi_Word_motion(char *command, int eat)
{
    while (cursor < command_len && !isspace(command[cursor]))
        input_forward();
    if (eat) while (cursor < command_len && isspace(command[cursor]))
        input_forward();
}

static void
vi_word_motion(char *command, int eat)
{
    if (isalnum(command[cursor]) || command[cursor] == '_') {
        while (cursor < command_len
         && (isalnum(command[cursor+1]) || command[cursor+1] == '_'))
            input_forward();
    } else if (ispunct(command[cursor])) {
        while (cursor < command_len && ispunct(command[cursor+1]))
            input_forward();
    }

    if (cursor < command_len)
        input_forward();

    if (eat && cursor < command_len && isspace(command[cursor]))
        while (cursor < command_len && isspace(command[cursor]))
            input_forward();
}

static void
vi_End_motion(char *command)
{
    input_forward();
    while (cursor < command_len && isspace(command[cursor]))
        input_forward();
    while (cursor < command_len-1 && !isspace(command[cursor+1]))
        input_forward();
}

static void
vi_end_motion(char *command)
{
    if (cursor >= command_len-1)
        return;
    input_forward();
    while (cursor < command_len-1 && isspace(command[cursor]))
        input_forward();
    if (cursor >= command_len-1)
        return;
    if (isalnum(command[cursor]) || command[cursor] == '_') {
        while (cursor < command_len-1
         && (isalnum(command[cursor+1]) || command[cursor+1] == '_')
        ) {
            input_forward();
        }
    } else if (ispunct(command[cursor])) {
        while (cursor < command_len-1 && ispunct(command[cursor+1]))
            input_forward();
    }
}

static void
vi_Back_motion(char *command)
{
    while (cursor > 0 && isspace(command[cursor-1]))
        input_backward(1);
    while (cursor > 0 && !isspace(command[cursor-1]))
        input_backward(1);
}

static void
vi_back_motion(char *command)
{
    if (cursor <= 0)
        return;
    input_backward(1);
    while (cursor > 0 && isspace(command[cursor]))
        input_backward(1);
    if (cursor <= 0)
        return;
    if (isalnum(command[cursor]) || command[cursor] == '_') {
        while (cursor > 0
         && (isalnum(command[cursor-1]) || command[cursor-1] == '_')
        ) {
            input_backward(1);
        }
    } else if (ispunct(command[cursor])) {
        while (cursor > 0 && ispunct(command[cursor-1]))
            input_backward(1);
    }
}
#endif


/*
 * read_line_input and its helpers
 */

#if !ENABLE_FEATURE_EDITING_FANCY_PROMPT
static void parse_prompt(const char *prmt_ptr)
{
    cmdedit_prompt = prmt_ptr;
    cmdedit_prmt_len = strlen(prmt_ptr);
    put_prompt();
}
#else
static void parse_prompt(const char *prmt_ptr)
{
    int prmt_len = 0;
    size_t cur_prmt_len = 0;
    char flg_not_length = '[';
    char *prmt_mem_ptr = xzalloc(1);
    char *pwd_buf = xrealloc_getcwd_or_warn(NULL);
    char buf2[PATH_MAX + 1];
    char buf[2];
    char c;
    char *pbuf;

    cmdedit_prmt_len = 0;

    if (!pwd_buf) {
        pwd_buf = (char *)bb_msg_unknown;
    }

    while (*prmt_ptr) {
        pbuf = buf;
        pbuf[1] = 0;
        c = *prmt_ptr++;
        if (c == '\\') {
            const char *cp = prmt_ptr;
            int l;

            c = bb_process_escape_sequence(&prmt_ptr);
            if (prmt_ptr == cp) {
                if (*cp == 0)
                    break;
                c = *prmt_ptr++;
                switch (c) {
#if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
                case 'u':
                    pbuf = user_buf ? user_buf : (char*)"";
                    break;
#endif
                case 'h':
                    pbuf = hostname_buf;
                    if (!pbuf) {
                        pbuf = xzalloc(256);
                        if (gethostname(pbuf, 255) < 0) {
                            strcpy(pbuf, "?");
                        } else {
                            char *s = strchr(pbuf, '.');
                            if (s)
                                *s = '\0';
                        }
                        hostname_buf = pbuf;
                    }
                    break;
                case '$':
                    c = (geteuid() == 0 ? '#' : '$');
                    break;
#if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
                case 'w':
                    pbuf = pwd_buf;
                    l = strlen(home_pwd_buf);
                    if (l != 0
                     && strncmp(home_pwd_buf, pbuf, l) == 0
                     && (pbuf[l]=='/' || pbuf[l]=='\0')
                     && strlen(pwd_buf+l)<PATH_MAX
                    ) {
                        pbuf = buf2;
                        *pbuf = '~';
                        strcpy(pbuf+1, pwd_buf+l);
                    }
                    break;
#endif
                case 'W':
                    pbuf = pwd_buf;
                    cp = strrchr(pbuf, '/');
                    if (cp != NULL && cp != pbuf)
                        pbuf += (cp-pbuf) + 1;
                    break;
                case '!':
                    pbuf = buf2;
                    snprintf(buf2, sizeof(buf2), "%d", num_ok_lines);
                    break;
                case 'e': case 'E':     /* \e \E = \033 */
                    c = '\033';
                    break;
                case 'x': case 'X':
                    for (l = 0; l < 3;) {
                        int h;
                        buf2[l++] = *prmt_ptr;
                        buf2[l] = 0;
                        h = strtol(buf2, &pbuf, 16);
                        if (h > UCHAR_MAX || (pbuf - buf2) < l) {
                            l--;
                            break;
                        }
                        prmt_ptr++;
                    }
                    buf2[l] = 0;
                    c = (char)strtol(buf2, NULL, 16);
                    if (c == 0)
                        c = '?';
                    pbuf = buf;
                    break;
                case '[': case ']':
                    if (c == flg_not_length) {
                        flg_not_length = flg_not_length == '[' ? ']' : '[';
                        continue;
                    }
                    break;
                }
            }
        }
        if (pbuf == buf)
            *pbuf = c;
        cur_prmt_len = strlen(pbuf);
        prmt_len += cur_prmt_len;
        if (flg_not_length != ']')
            cmdedit_prmt_len += cur_prmt_len;
        prmt_mem_ptr = strcat(xrealloc(prmt_mem_ptr, prmt_len+1), pbuf);
    }
    if (pwd_buf != (char *)bb_msg_unknown)
        free(pwd_buf);
    cmdedit_prompt = prmt_mem_ptr;
    put_prompt();
}
#endif

#define setTermSettings(fd, argp) tcsetattr(fd, TCSANOW, argp)
#define getTermSettings(fd, argp) tcgetattr(fd, argp);

static sighandler_t previous_SIGWINCH_handler;

static void cmdedit_setwidth(unsigned w, int redraw_flg)
{
    cmdedit_termw = w;
    if (redraw_flg) {
        /* new y for current cursor */
        int new_y = (cursor + cmdedit_prmt_len) / w;
        /* redraw */
        redraw((new_y >= cmdedit_y ? new_y : cmdedit_y), command_len - cursor);
        fflush(stdout);
    }
}

static void win_changed(int nsig)
{
    int 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 */
}

/*
 * The emacs and vi modes share much of the code in the big
 * command loop.  Commands entered when in vi's command mode (aka
 * "escape mode") get an extra bit added to distinguish them --
 * this keeps them from being self-inserted.  This clutters the
 * big switch a bit, but keeps all the code in one place.
 */

#define vbit 0x100

/* leave out the "vi-mode"-only case labels if vi editing isn't
 * configured. */
#define vi_case(caselabel) USE_FEATURE_EDITING(case caselabel)

/* convert uppercase ascii to equivalent control char, for readability */
#undef CTRL
#define CTRL(a) ((a) & ~0x40)

/* Returns:
 * -1 on read errors or EOF, or on bare Ctrl-D.
 * 0  on ctrl-C,
 * >0 length of input string, including terminating '\n'
 */
int read_line_input(const char* prompt, char* command, int maxsize, line_input_t *st)
{
    int lastWasTab = FALSE;
    unsigned int ic;
    unsigned char c;
    smallint break_out = 0;
#if ENABLE_FEATURE_EDITING_VI
    smallint vi_cmdmode = 0;
    smalluint prevc;
#endif

// FIXME: audit & improve this
    if (maxsize > MAX_LINELEN)
        maxsize = MAX_LINELEN;

    /* With null flags, no other fields are ever used */
    state = st ? st : (line_input_t*) &const_int_0;
#if ENABLE_FEATURE_EDITING_SAVEHISTORY
    if ((state->flags & SAVE_HISTORY) && state->hist_file)
        load_history(state->hist_file);
#endif

    /* prepare before init handlers */
    cmdedit_y = 0;  /* quasireal y, not true if line > xt*yt */
    command_len = 0;
    command_ps = command;
    command[0] = '\0';

    getTermSettings(0, (void *) &initial_settings);
    memcpy(&new_settings, &initial_settings, sizeof(new_settings));
    new_settings.c_lflag &= ~ICANON;        /* unbuffered input */
    /* Turn off echoing and CTRL-C, so we can trap it */
    new_settings.c_lflag &= ~(ECHO | ECHONL | ISIG);
    /* Hmm, in linux c_cc[] is not parsed if ICANON is off */
    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;
    setTermSettings(0, (void *) &new_settings);

    /* Now initialize things */
    previous_SIGWINCH_handler = signal(SIGWINCH, win_changed);
    win_changed(0); /* do initial resizing */
#if ENABLE_FEATURE_GETUSERNAME_AND_HOMEDIR
    {
        struct passwd *entry;

        entry = getpwuid(geteuid());
        if (entry) {
            /* If we enter read_line_input for the Nth time,
             * they may be already allocated! Need to free. */
            free(user_buf);
            if (home_pwd_buf != null_str)
                free(home_pwd_buf);
            user_buf = xstrdup(entry->pw_name);
            home_pwd_buf = xstrdup(entry->pw_dir);
            /* They are not freed on exit (too small to bother) */
        }
    }
#endif
    /* Print out the command prompt */
    parse_prompt(prompt);

    while (1) {
        fflush(stdout);

        if (safe_read(0, &c, 1) < 1) {
            /* if we can't read input then exit */
            goto prepare_to_die;
        }

        ic = c;

#if ENABLE_FEATURE_EDITING_VI
        newdelflag = 1;
        if (vi_cmdmode)
            ic |= vbit;
#endif
        switch (ic) {
        case '\n':
        case '\r':
        vi_case('\n'|vbit:)
        vi_case('\r'|vbit:)
            /* Enter */
            goto_new_line();
            break_out = 1;
            break;
#if ENABLE_FEATURE_EDITING_FANCY_KEYS
        case CTRL('A'):
        vi_case('0'|vbit:)
            /* Control-a -- Beginning of line */
            input_backward(cursor);
            break;
        case CTRL('B'):
        vi_case('h'|vbit:)
        vi_case('\b'|vbit:)
        vi_case('\x7f'|vbit:) /* DEL */
            /* Control-b -- Move back one character */
            input_backward(1);
            break;
#endif
        case CTRL('C'):
        vi_case(CTRL('C')|vbit:)
            /* Control-c -- stop gathering input */
            goto_new_line();
            command_len = 0;
            break_out = -1; /* "do not append '\n'" */
            break;
        case CTRL('D'):
            /* Control-d -- Delete one character, or exit
             * if the len=0 and no chars to delete */
            if (command_len == 0) {
                errno = 0;
 prepare_to_die:
                /* to control stopped jobs */
                break_out = command_len = -1;
                break;
            }
            input_delete(0);
            break;

#if ENABLE_FEATURE_EDITING_FANCY_KEYS
        case CTRL('E'):
        vi_case('$'|vbit:)
            /* Control-e -- End of line */
            input_end();
            break;
        case CTRL('F'):
        vi_case('l'|vbit:)
        vi_case(' '|vbit:)
            /* Control-f -- Move forward one character */
            input_forward();
            break;
#endif

        case '\b':
        case '\x7f': /* DEL */
            /* Control-h and DEL */
            input_backspace();
            break;

        case '\t':
            input_tab(&lastWasTab);
            break;

#if ENABLE_FEATURE_EDITING_FANCY_KEYS
        case CTRL('K'):
            /* Control-k -- clear to end of line */
            command[cursor] = 0;
            command_len = cursor;
            printf("\033[J");
            break;
        case CTRL('L'):
        vi_case(CTRL('L')|vbit:)
            /* Control-l -- clear screen */
            printf("\033[H");
            redraw(0, command_len - cursor);
            break;
#endif

#if MAX_HISTORY > 0
        case CTRL('N'):
        vi_case(CTRL('N')|vbit:)
        vi_case('j'|vbit:)
            /* Control-n -- Get next command in history */
            if (get_next_history())
                goto rewrite_line;
            break;
        case CTRL('P'):
        vi_case(CTRL('P')|vbit:)
        vi_case('k'|vbit:)
            /* Control-p -- Get previous command from history */
            if ((state->flags & DO_HISTORY) && state->cur_history > 0) {
                get_previous_history();
                goto rewrite_line;
            }
            beep();
            break;
#endif

#if ENABLE_FEATURE_EDITING_FANCY_KEYS
        case CTRL('U'):
        vi_case(CTRL('U')|vbit:)
            /* Control-U -- Clear line before cursor */
            if (cursor) {
                strcpy(command, command + cursor);
                command_len -= cursor;
                redraw(cmdedit_y, command_len);
            }
            break;
#endif
        case CTRL('W'):
        vi_case(CTRL('W')|vbit:)
            /* Control-W -- Remove the last word */
            while (cursor > 0 && isspace(command[cursor-1]))
                input_backspace();
            while (cursor > 0 && !isspace(command[cursor-1]))
                input_backspace();
            break;

#if ENABLE_FEATURE_EDITING_VI
        case 'i'|vbit:
            vi_cmdmode = 0;
            break;
        case 'I'|vbit:
            input_backward(cursor);
            vi_cmdmode = 0;
            break;
        case 'a'|vbit:
            input_forward();
            vi_cmdmode = 0;
            break;
        case 'A'|vbit:
            input_end();
            vi_cmdmode = 0;
            break;
        case 'x'|vbit:
            input_delete(1);
            break;
        case 'X'|vbit:
            if (cursor > 0) {
                input_backward(1);
                input_delete(1);
            }
            break;
        case 'W'|vbit:
            vi_Word_motion(command, 1);
            break;
        case 'w'|vbit:
            vi_word_motion(command, 1);
            break;
        case 'E'|vbit:
            vi_End_motion(command);
            break;
        case 'e'|vbit:
            vi_end_motion(command);
            break;
        case 'B'|vbit:
            vi_Back_motion(command);
            break;
        case 'b'|vbit:
            vi_back_motion(command);
            break;
        case 'C'|vbit:
            vi_cmdmode = 0;
            /* fall through */
        case 'D'|vbit:
            goto clear_to_eol;

        case 'c'|vbit:
            vi_cmdmode = 0;
            /* fall through */
        case 'd'|vbit: {
            int nc, sc;
            sc = cursor;
            prevc = ic;
            if (safe_read(0, &c, 1) < 1)
                goto prepare_to_die;
            if (c == (prevc & 0xff)) {
                /* "cc", "dd" */
                input_backward(cursor);
                goto clear_to_eol;
                break;
            }
            switch (c) {
            case 'w':
            case 'W':
            case 'e':
            case 'E':
                switch (c) {
                case 'w':   /* "dw", "cw" */
                    vi_word_motion(command, vi_cmdmode);
                    break;
                case 'W':   /* 'dW', 'cW' */
                    vi_Word_motion(command, vi_cmdmode);
                    break;
                case 'e':   /* 'de', 'ce' */
                    vi_end_motion(command);
                    input_forward();
                    break;
                case 'E':   /* 'dE', 'cE' */
                    vi_End_motion(command);
                    input_forward();
                    break;
                }
                nc = cursor;
                input_backward(cursor - sc);
                while (nc-- > cursor)
                    input_delete(1);
                break;
            case 'b':  /* "db", "cb" */
            case 'B':  /* implemented as B */
                if (c == 'b')
                    vi_back_motion(command);
                else
                    vi_Back_motion(command);
                while (sc-- > cursor)
                    input_delete(1);
                break;
            case ' ':  /* "d ", "c " */
                input_delete(1);
                break;
            case '$':  /* "d$", "c$" */
            clear_to_eol:
                while (cursor < command_len)
                    input_delete(1);
                break;
            }
            break;
        }
        case 'p'|vbit:
            input_forward();
            /* fallthrough */
        case 'P'|vbit:
            put();
            break;
        case 'r'|vbit:
            if (safe_read(0, &c, 1) < 1)
                goto prepare_to_die;
            if (c == 0)
                beep();
            else {
                *(command + cursor) = c;
                putchar(c);
                putchar('\b');
            }
            break;
#endif /* FEATURE_COMMAND_EDITING_VI */

        case '\x1b': /* ESC */

#if ENABLE_FEATURE_EDITING_VI
            if (state->flags & VI_MODE) {
                /* ESC: insert mode --> command mode */
                vi_cmdmode = 1;
                input_backward(1);
                break;
            }
#endif
            /* escape sequence follows */
            if (safe_read(0, &c, 1) < 1)
                goto prepare_to_die;
            /* different vt100 emulations */
            if (c == '[' || c == 'O') {
        vi_case('['|vbit:)
        vi_case('O'|vbit:)
                if (safe_read(0, &c, 1) < 1)
                    goto prepare_to_die;
            }
            if (c >= '1' && c <= '9') {
                unsigned char dummy;

                if (safe_read(0, &dummy, 1) < 1)
                    goto prepare_to_die;
                if (dummy != '~')
                    c = '\0';
            }

            switch (c) {
#if ENABLE_FEATURE_TAB_COMPLETION
            case '\t':                      /* Alt-Tab */
                input_tab(&lastWasTab);
                break;
#endif
#if MAX_HISTORY > 0
            case 'A':
                /* Up Arrow -- Get previous command from history */
                if ((state->flags & DO_HISTORY) && state->cur_history > 0) {
                    get_previous_history();
                    goto rewrite_line;
                }
                beep();
                break;
            case 'B':
                /* Down Arrow -- Get next command in history */
                if (!get_next_history())
                    break;
 rewrite_line:
                /* Rewrite the line with the selected history item */
                /* change command */
                command_len = strlen(strcpy(command, state->history[state->cur_history]));
                /* redraw and go to eol (bol, in vi */
                redraw(cmdedit_y, (state->flags & VI_MODE) ? 9999 : 0);
                break;
#endif
            case 'C':
                /* Right Arrow -- Move forward one character */
                input_forward();
                break;
            case 'D':
                /* Left Arrow -- Move back one character */
                input_backward(1);
                break;
            case '3':
                /* Delete */
                input_delete(0);
                break;
            case '1': // vt100? linux vt? or what?
            case '7': // vt100? linux vt? or what?
            case 'H': /* xterm's <Home> */
                input_backward(cursor);
                break;
            case '4': // vt100? linux vt? or what?
            case '8': // vt100? linux vt? or what?
            case 'F': /* xterm's <End> */
                input_end();
                break;
            default:
                c = '\0';
                beep();
            }
            break;

        default:        /* If it's regular input, do the normal thing */
#if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
            /* Control-V -- Add non-printable symbol */
            if (c == CTRL('V')) {
                if (safe_read(0, &c, 1) < 1)
                    goto prepare_to_die;
                if (c == 0) {
                    beep();
                    break;
                }
            } else
#endif

#if ENABLE_FEATURE_EDITING_VI
            if (vi_cmdmode)  /* Don't self-insert */
                break;
#endif
            if (!Isprint(c)) /* Skip non-printable characters */
                break;

            if (command_len >= (maxsize - 2))        /* Need to leave space for enter */
                break;

            command_len++;
            if (cursor == (command_len - 1)) {      /* Append if at the end of the line */
                command[cursor] = c;
                command[cursor+1] = '\0';
                cmdedit_set_out_char(' ');
            } else {                        /* Insert otherwise */
                int sc = cursor;

                memmove(command + sc + 1, command + sc, command_len - sc);
                command[sc] = c;
                sc++;
                /* rewrite from cursor */
                input_end();
                /* to prev x pos + 1 */
                input_backward(cursor - sc);
            }
            break;
        }
        if (break_out)                  /* Enter is the command terminator, no more input. */
            break;

        if (c != '\t')
            lastWasTab = FALSE;
    }

    if (command_len > 0)
        remember_in_history(command);

    if (break_out > 0) {
        command[command_len++] = '\n';
        command[command_len] = '\0';
    }

#if ENABLE_FEATURE_CLEAN_UP && ENABLE_FEATURE_TAB_COMPLETION
    free_tab_completion_data();
#endif

#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
    free((char*)cmdedit_prompt);
#endif
    /* restore initial_settings */
    setTermSettings(STDIN_FILENO, (void *) &initial_settings);
    /* restore SIGWINCH handler */
    signal(SIGWINCH, previous_SIGWINCH_handler);
    fflush(stdout);
    return command_len;
}

line_input_t *new_line_input_t(int flags)
{
    line_input_t *n = xzalloc(sizeof(*n));
    n->flags = flags;
    return n;
}

#else

#undef read_line_input
int read_line_input(const char* prompt, char* command, int maxsize)
{
    fputs(prompt, stdout);
    fflush(stdout);
    fgets(command, maxsize, stdin);
    return strlen(command);
}

#endif  /* FEATURE_COMMAND_EDITING */


/*
 * Testing
 */

#ifdef TEST

#include <locale.h>

const char *applet_name = "debug stuff usage";

int main(int argc, char **argv)
{
    char buff[MAX_LINELEN];
    char *prompt =
#if ENABLE_FEATURE_EDITING_FANCY_PROMPT
        "\\[\\033[32;1m\\]\\u@\\[\\x1b[33;1m\\]\\h:"
        "\\[\\033[34;1m\\]\\w\\[\\033[35;1m\\] "
        "\\!\\[\\e[36;1m\\]\\$ \\[\\E[0m\\]";
#else
        "% ";
#endif

#if ENABLE_FEATURE_NONPRINTABLE_INVERSE_PUT
    setlocale(LC_ALL, "");
#endif
    while (1) {
        int l;
        l = read_line_input(prompt, buff);
        if (l <= 0 || buff[l-1] != '\n')
            break;
        buff[l-1] = 0;
        printf("*** read_line_input() returned line =%s=\n", buff);
    }
    printf("*** read_line_input() detect ^D\n");
    return 0;
}

#endif  /* TEST */