mc/src/filemanager/usermenu.c

/*
   User Menu implementation

   Copyright (C) 1994, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   2006, 2007, 2011
   The Free Software Foundation, Inc.

   This file is part of the Midnight Commander.

   The Midnight Commander is free software: you can redistribute it
   and/or modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation, either version 3 of the License,
   or (at your option) any later version.

   The Midnight Commander is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/** \file usermenu.c
 *  \brief Source: user menu implementation
 */

#include <config.h>

#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "lib/global.h"
#include "lib/tty/tty.h"
#include "lib/skin.h"
#include "lib/search.h"
#include "lib/vfs/vfs.h"
#include "lib/strutil.h"
#include "lib/util.h"
#include "lib/widget.h"

#include "src/editor/edit.h"    /* WEdit, BLOCK_FILE */
#include "src/viewer/mcviewer.h"        /* for default_* externs */

#include "src/execute.h"
#include "src/setup.h"
#include "src/history.h"

#include "dir.h"
#include "midnight.h"
#include "layout.h"

#include "usermenu.h"

/*** global variables ****************************************************************************/

/*** file scope macro definitions ****************************************************************/

#define MAX_ENTRIES 16
#define MAX_ENTRY_LEN 60

/*** file scope type declarations ****************************************************************/

/*** file scope variables ************************************************************************/

static int debug_flag = 0;
static int debug_error = 0;
static char *menu = NULL;

/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */

/** strip file's extension */
static char *
strip_ext (char *ss)
{
    register char *s = ss;
    char *e = NULL;
    while (*s)
    {
        if (*s == '.')
            e = s;
        if (*s == PATH_SEP && e)
            e = NULL;           /* '.' in *directory* name */
        s++;
    }
    if (e)
        *e = 0;
    return ss;
}

/* --------------------------------------------------------------------------------------------- */
/**
 * Check for the "shell_patterns" directive.  If it's found and valid,
 * interpret it and move the pointer past the directive.  Return the
 * current pointer.
 */

static char *
check_patterns (char *p)
{
    static const char def_name[] = "shell_patterns=";
    char *p0 = p;

    if (strncmp (p, def_name, sizeof (def_name) - 1) != 0)
        return p0;

    p += sizeof (def_name) - 1;
    if (*p == '1')
        easy_patterns = 1;
    else if (*p == '0')
        easy_patterns = 0;
    else
        return p0;

    /* Skip spaces */
    p++;
    while (*p == '\n' || *p == '\t' || *p == ' ')
        p++;
    return p;
}

/* --------------------------------------------------------------------------------------------- */
/** Copies a whitespace separated argument from p to arg. Returns the
   point after argument. */

static char *
extract_arg (char *p, char *arg, int size)
{
    char *np;

    while (*p && (*p == ' ' || *p == '\t' || *p == '\n'))
        p++;
    /* support quote space .mnu */
    while (*p && (*p != ' ' || *(p - 1) == '\\') && *p != '\t' && *p != '\n')
    {
        np = str_get_next_char (p);
        if (np - p >= size)
            break;
        memcpy (arg, p, np - p);
        arg += np - p;
        size -= np - p;
        p = np;
    }
    *arg = 0;
    if (!*p || *p == '\n')
        str_prev_char (&p);
    return p;
}

/* --------------------------------------------------------------------------------------------- */
/* Tests whether the selected file in the panel is of any of the types
   specified in argument. */

static int
test_type (WPanel * panel, char *arg)
{
    int result = 0;             /* False by default */
    int st_mode = panel->dir.list[panel->selected].st.st_mode;

    for (; *arg != 0; arg++)
    {
        switch (*arg)
        {
        case 'n':              /* Not a directory */
            result |= !S_ISDIR (st_mode);
            break;
        case 'r':              /* Regular file */
            result |= S_ISREG (st_mode);
            break;
        case 'd':              /* Directory */
            result |= S_ISDIR (st_mode);
            break;
        case 'l':              /* Link */
            result |= S_ISLNK (st_mode);
            break;
        case 'c':              /* Character special */
            result |= S_ISCHR (st_mode);
            break;
        case 'b':              /* Block special */
            result |= S_ISBLK (st_mode);
            break;
        case 'f':              /* Fifo (named pipe) */
            result |= S_ISFIFO (st_mode);
            break;
        case 's':              /* Socket */
            result |= S_ISSOCK (st_mode);
            break;
        case 'x':              /* Executable */
            result |= (st_mode & 0111) ? 1 : 0;
            break;
        case 't':
            result |= panel->marked ? 1 : 0;
            break;
        default:
            debug_error = 1;
            break;
        }
    }
    return result;
}

/* --------------------------------------------------------------------------------------------- */
/** Calculates the truth value of the next condition starting from
   p. Returns the point after condition. */

static char *
test_condition (WEdit * edit_widget, char *p, int *condition)
{
    char arg[256];
    const mc_search_type_t search_type = easy_patterns ? MC_SEARCH_T_GLOB : MC_SEARCH_T_REGEX;

    /* Handle one condition */
    for (; *p != '\n' && *p != '&' && *p != '|'; p++)
    {
        WPanel *panel = NULL;

        /* support quote space .mnu */
        if ((*p == ' ' && *(p - 1) != '\\') || *p == '\t')
            continue;
        if (*p >= 'a')
            panel = current_panel;
        else if (get_other_type () == view_listing)
            panel = other_panel;

        *p |= 0x20;

        switch (*p++)
        {
        case '!':
            p = test_condition (edit_widget, p, condition);
            *condition = !*condition;
            str_prev_char (&p);
            break;
        case 'f':              /* file name pattern */
            p = extract_arg (p, arg, sizeof (arg));
#ifdef USE_INTERNAL_EDIT
            if (edit_widget != NULL)
            {
                char *edit_filename;

                edit_filename = edit_get_file_name (edit_widget);
                *condition = mc_search (arg, edit_filename, search_type) ? 1 : 0;
                g_free (edit_filename);
            }
            else
#endif
                *condition = panel != NULL &&
                    mc_search (arg, panel->dir.list[panel->selected].fname, search_type) ? 1 : 0;
            break;
        case 'y':              /* syntax pattern */
#ifdef USE_INTERNAL_EDIT
            if (edit_widget != NULL)
            {
                const char *syntax_type = edit_get_syntax_type (edit_widget);
                if (syntax_type != NULL)
                {
                    p = extract_arg (p, arg, sizeof (arg));
                    *condition = mc_search (arg, syntax_type, MC_SEARCH_T_NORMAL) ? 1 : 0;
                }
            }
#endif
            break;
        case 'd':
            p = extract_arg (p, arg, sizeof (arg));
            {
                char *cwd_str;

                cwd_str = vfs_path_to_str (panel->cwd_vpath);
                *condition = panel != NULL && mc_search (arg, cwd_str, search_type) ? 1 : 0;
                g_free (cwd_str);
            }
            break;
        case 't':
            p = extract_arg (p, arg, sizeof (arg));
            *condition = panel != NULL && test_type (panel, arg) ? 1 : 0;
            break;
        case 'x':              /* executable */
            {
                struct stat status;

                p = extract_arg (p, arg, sizeof (arg));
                if (stat (arg, &status) == 0)
                    *condition = is_exe (status.st_mode) ? 1 : 0;
                else
                    *condition = 0;
                break;
            }
        default:
            debug_error = 1;
            break;
        }                       /* switch */

    }                           /* while */
    return p;
}

/* --------------------------------------------------------------------------------------------- */
/** General purpose condition debug output handler */

static void
debug_out (char *start, char *end, int cond)
{
    static char *msg;
    int len;

    if (start == NULL && end == NULL)
    {
        /* Show output */
        if (debug_flag && msg)
        {
            len = strlen (msg);
            if (len)
                msg[len - 1] = 0;
            message (D_NORMAL, _("Debug"), "%s", msg);

        }
        debug_flag = 0;
        g_free (msg);
        msg = NULL;
    }
    else
    {
        const char *type;
        char *p;

        /* Save debug info for later output */
        if (!debug_flag)
            return;
        /* Save the result of the condition */
        if (debug_error)
        {
            type = _("ERROR:");
            debug_error = 0;
        }
        else if (cond)
            type = _("True:");
        else
            type = _("False:");
        /* This is for debugging, don't need to be super efficient.  */
        if (end == NULL)
            p = g_strdup_printf ("%s %s %c \n", msg ? msg : "", type, *start);
        else
            p = g_strdup_printf ("%s %s %.*s \n", msg ? msg : "", type, (int) (end - start), start);
        g_free (msg);
        msg = p;
    }
}

/* --------------------------------------------------------------------------------------------- */
/** Calculates the truth value of one lineful of conditions. Returns
   the point just before the end of line. */

static char *
test_line (WEdit * edit_widget, char *p, int *result)
{
    int condition;
    char operator;
    char *debug_start, *debug_end;

    /* Repeat till end of line */
    while (*p && *p != '\n')
    {
        /* support quote space .mnu */
        while ((*p == ' ' && *(p - 1) != '\\') || *p == '\t')
            p++;
        if (!*p || *p == '\n')
            break;
        operator = *p++;
        if (*p == '?')
        {
            debug_flag = 1;
            p++;
        }
        /* support quote space .mnu */
        while ((*p == ' ' && *(p - 1) != '\\') || *p == '\t')
            p++;
        if (!*p || *p == '\n')
            break;
        condition = 1;          /* True by default */

        debug_start = p;
        p = test_condition (edit_widget, p, &condition);
        debug_end = p;
        /* Add one debug statement */
        debug_out (debug_start, debug_end, condition);

        switch (operator)
        {
        case '+':
        case '=':
            /* Assignment */
            *result = condition;
            break;
        case '&':              /* Logical and */
            *result &= condition;
            break;
        case '|':              /* Logical or */
            *result |= condition;
            break;
        default:
            debug_error = 1;
            break;
        }                       /* switch */
        /* Add one debug statement */
        debug_out (&operator, NULL, *result);

    }                           /* while (*p != '\n') */
    /* Report debug message */
    debug_out (NULL, NULL, 1);

    if (!*p || *p == '\n')
        str_prev_char (&p);
    return p;
}

/* --------------------------------------------------------------------------------------------- */
/** FIXME: recode this routine on version 3.0, it could be cleaner */

static void
execute_menu_command (WEdit * edit_widget, const char *commands, gboolean show_prompt)
{
    FILE *cmd_file;
    int cmd_file_fd;
    int expand_prefix_found = 0;
    char *parameter = 0;
    gboolean do_quote = FALSE;
    char lc_prompt[80];
    int col;
    vfs_path_t *file_name_vpath;
    int run_view = 0;

    /* Skip menu entry title line */
    commands = strchr (commands, '\n');
    if (!commands)
    {
        return;
    }

    cmd_file_fd = mc_mkstemps (&file_name_vpath, "mcusr", SCRIPT_SUFFIX);

    if (cmd_file_fd == -1)
    {
        message (D_ERROR, MSG_ERROR, _("Cannot create temporary command file\n%s"),
                 unix_error_string (errno));
        vfs_path_free (file_name_vpath);
        return;
    }
    cmd_file = fdopen (cmd_file_fd, "w");
    fputs ("#! /bin/sh\n", cmd_file);
    commands++;

    for (col = 0; *commands; commands++)
    {
        if (col == 0)
        {
            if (*commands != ' ' && *commands != '\t')
                break;
            while (*commands == ' ' || *commands == '\t')
                commands++;
            if (*commands == 0)
                break;
        }
        col++;
        if (*commands == '\n')
            col = 0;
        if (parameter)
        {
            if (*commands == '}')
            {
                char *tmp;
                *parameter = 0;
                parameter =
                    input_dialog (_("Parameter"), lc_prompt, MC_HISTORY_FM_MENU_EXEC_PARAM, "");
                if (!parameter || !*parameter)
                {
                    /* User canceled */
                    fclose (cmd_file);
                    mc_unlink (file_name_vpath);
                    vfs_path_free (file_name_vpath);
                    return;
                }
                if (do_quote)
                {
                    tmp = name_quote (parameter, 0);
                    fputs (tmp, cmd_file);
                    g_free (tmp);
                }
                else
                    fputs (parameter, cmd_file);
                g_free (parameter);
                parameter = 0;
            }
            else
            {
                if (parameter < &lc_prompt[sizeof (lc_prompt) - 1])
                {
                    *parameter++ = *commands;
                }
            }
        }
        else if (expand_prefix_found)
        {
            expand_prefix_found = 0;
            if (g_ascii_isdigit ((gchar) * commands))
            {
                do_quote = (atoi (commands) != 0);
                while (g_ascii_isdigit ((gchar) * commands))
                    commands++;
            }
            if (*commands == '{')
                parameter = lc_prompt;
            else
            {
                char *text = expand_format (edit_widget, *commands, do_quote);
                fputs (text, cmd_file);
                g_free (text);
            }
        }
        else
        {
            if (*commands == '%')
            {
                int i = check_format_view (commands + 1);
                if (i)
                {
                    commands += i;
                    run_view = 1;
                }
                else
                {
                    do_quote = TRUE;    /* Default: Quote expanded macro */
                    expand_prefix_found = 1;
                }
            }
            else
                fputc (*commands, cmd_file);
        }
    }
    fclose (cmd_file);
    mc_chmod (file_name_vpath, S_IRWXU);
    if (run_view)
    {
        char *file_name;

        file_name = vfs_path_to_str (file_name_vpath);
        mcview_viewer (file_name, NULL, 0);
        g_free (file_name);
        dialog_switch_process_pending ();
    }
    else
    {
        /* execute the command indirectly to allow execution even
         * on no-exec filesystems. */
        char *file_name, *cmd;

        file_name = vfs_path_to_str (file_name_vpath);
        cmd = g_strconcat ("/bin/sh ", file_name, (char *) NULL);
        g_free (file_name);
        if (!show_prompt)
        {
            if (system (cmd) == -1)
                message (D_ERROR, MSG_ERROR, "%s", _("Error calling program"));
        }
        else
        {
            shell_execute (cmd, EXECUTE_HIDE);
        }
        g_free (cmd);
    }
    mc_unlink (file_name_vpath);
    vfs_path_free (file_name_vpath);
}

/* --------------------------------------------------------------------------------------------- */
/**
 **     Check owner of the menu file. Using menu file is allowed, if
 **     owner of the menu is root or the actual user. In either case
 **     file should not be group and word-writable.
 **
 **     Q. Should we apply this routine to system and home menu (and .ext files)?
 */

static int
menu_file_own (char *path)
{
    struct stat st;

    if (stat (path, &st) == 0
        && (!st.st_uid || (st.st_uid == geteuid ())) && ((st.st_mode & (S_IWGRP | S_IWOTH)) == 0))
    {
        return 1;
    }
    if (verbose)
    {
        message (D_NORMAL, _("Warning -- ignoring file"),
                 _("File %s is not owned by root or you or is world writable.\n"
                   "Using it may compromise your security"), path);
    }
    return 0;
}

/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */

/* Formats defined:
   %%  The % character
   %f  The current file (if non-local vfs, file will be copied locally and
   %f will be full path to it).
   %p  The current file
   %d  The current working directory
   %s  "Selected files"; the tagged files if any, otherwise the current file
   %t  Tagged files
   %u  Tagged files (and they are untagged on return from expand_format)
   %view Runs the commands and pipes standard output to the view command.
   If %view is immediately followed by '{', recognize keywords
   ascii, hex, nroff and unform

   If the format letter is in uppercase, it refers to the other panel.

   With a number followed the % character you can turn quoting on (default)
   and off. For example:
   %f    quote expanded macro
   %1f   ditto
   %0f   don't quote expanded macro

   expand_format returns a memory block that must be free()d.
 */

/* Returns how many characters we should advance if %view was found */
int
check_format_view (const char *p)
{
    const char *q = p;
    if (!strncmp (p, "view", 4))
    {
        q += 4;
        if (*q == '{')
        {
            for (q++; *q && *q != '}'; q++)
            {
                if (!strncmp (q, "ascii", 5))
                {
                    mcview_default_hex_mode = 0;
                    q += 4;
                }
                else if (!strncmp (q, "hex", 3))
                {
                    mcview_default_hex_mode = 1;
                    q += 2;
                }
                else if (!strncmp (q, "nroff", 5))
                {
                    mcview_default_nroff_flag = 1;
                    q += 4;
                }
                else if (!strncmp (q, "unform", 6))
                {
                    mcview_default_nroff_flag = 0;
                    q += 5;
                }
            }
            if (*q == '}')
                q++;
        }
        return q - p;
    }
    return 0;
}

/* --------------------------------------------------------------------------------------------- */

int
check_format_cd (const char *p)
{
    return (strncmp (p, "cd", 2)) ? 0 : 3;
}

/* --------------------------------------------------------------------------------------------- */
/* Check if p has a "^var\{var-name\}" */
/* Returns the number of skipped characters (zero on not found) */
/* V will be set to the expanded variable name */

int
check_format_var (const char *p, char **v)
{
    const char *q = p;
    char *var_name;
    const char *value;
    const char *dots = 0;

    *v = 0;
    if (!strncmp (p, "var{", 4))
    {
        for (q += 4; *q && *q != '}'; q++)
        {
            if (*q == ':')
                dots = q + 1;
        }
        if (!*q)
            return 0;

        if (!dots || dots == q + 5)
        {
            message (D_ERROR,
                     _("Format error on file Extensions File"),
                     !dots ? _("The %%var macro has no default")
                     : _("The %%var macro has no variable"));
            return 0;
        }

        /* Copy the variable name */
        var_name = g_strndup (p + 4, dots - 2 - (p + 3));

        value = getenv (var_name);
        g_free (var_name);
        if (value)
        {
            *v = g_strdup (value);
            return q - p;
        }
        var_name = g_strndup (dots, q - dots);
        *v = var_name;
        return q - p;
    }
    return 0;
}

/* --------------------------------------------------------------------------------------------- */

char *
expand_format (struct WEdit *edit_widget, char c, gboolean do_quote)
{
    WPanel *panel = NULL;
    char *(*quote_func) (const char *, int);
    char *fname = NULL;
    char *result;
    char c_lc;

#ifndef USE_INTERNAL_EDIT
    (void) edit_widget;
#endif

    if (c == '%')
        return g_strdup ("%");

    if (mc_global.mc_run_mode == MC_RUN_FULL)
    {
        if (g_ascii_islower ((gchar) c))
            panel = current_panel;
        else
        {
            if (get_other_type () != view_listing)
                return g_strdup ("");
            panel = other_panel;
        }
        fname = g_strdup (panel->dir.list[panel->selected].fname);
    }
#ifdef USE_INTERNAL_EDIT
    else if (mc_global.mc_run_mode == MC_RUN_EDITOR)
        fname = edit_get_file_name (edit_widget);
#endif

    if (do_quote)
        quote_func = name_quote;
    else
        quote_func = fake_name_quote;

    c_lc = g_ascii_tolower ((gchar) c);

    switch (c_lc)
    {
    case 'f':
    case 'p':
        result = (*quote_func) (fname, 0);
        goto ret;
    case 'x':
        result = (*quote_func) (extension (fname), 0);
        goto ret;
    case 'd':
        {
            char *cwd;
            char *qstr;

            if (panel)
                cwd = vfs_path_to_str (panel->cwd_vpath);
            else
                cwd = vfs_get_current_dir ();

            qstr = (*quote_func) (cwd, 0);

            g_free (cwd);

            result = qstr;
            goto ret;
        }
    case 'i':                  /* indent equal number cursor position in line */
#ifdef USE_INTERNAL_EDIT
        if (edit_widget)
        {
            result = g_strnfill (edit_get_curs_col (edit_widget), ' ');
            goto ret;
        }
#endif
        break;
    case 'y':                  /* syntax type */
#ifdef USE_INTERNAL_EDIT
        if (edit_widget)
        {
            const char *syntax_type = edit_get_syntax_type (edit_widget);
            if (syntax_type != NULL)
            {
                result = g_strdup (syntax_type);
                goto ret;
            }
        }
#endif
        break;
    case 'k':                  /* block file name */
    case 'b':                  /* block file name / strip extension */
        {
#ifdef USE_INTERNAL_EDIT
            if (edit_widget)
            {
                char *file;

                file = mc_config_get_full_path (EDIT_BLOCK_FILE);
                result = (*quote_func) (file, 0);
                g_free (file);
                goto ret;
            }
#endif
            if (c_lc == 'b')
            {
                result = strip_ext ((*quote_func) (fname, 0));
                goto ret;
            }
            break;
        }
    case 'n':                  /* strip extension in editor */
#ifdef USE_INTERNAL_EDIT
        if (edit_widget)
        {
            result = strip_ext ((*quote_func) (fname, 0));
            goto ret;
        }
#endif
        break;
    case 'm':                  /* menu file name */
        if (menu)
        {
            result = (*quote_func) (menu, 0);
            goto ret;
        }
        break;
    case 's':
        if (!panel || !panel->marked)
        {
            result = (*quote_func) (fname, 0);
            goto ret;
        }

        /* Fall through */

    case 't':
    case 'u':
        {
            GString *block;
            int i;

            if (panel == NULL)
            {
                result = g_strdup ("");
                goto ret;
            }

            block = g_string_sized_new (16);

            for (i = 0; i < panel->count; i++)
                if (panel->dir.list[i].f.marked)
                {
                    char *tmp;

                    tmp = (*quote_func) (panel->dir.list[i].fname, 0);
                    g_string_append (block, tmp);
                    g_string_append_c (block, ' ');
                    g_free (tmp);

                    if (c_lc == 'u')
                        do_file_mark (panel, i, 0);
                }
            result = g_string_free (block, FALSE);
            goto ret;
        }                       /* sub case block */
    }                           /* switch */
    result = g_strdup ("% ");
    result[1] = c;
  ret:
    g_free (fname);
    return result;
}

/* --------------------------------------------------------------------------------------------- */
/**
 * If edit_widget is NULL then we are called from the mc menu,
 * otherwise we are called from the mcedit menu.
 */

gboolean
user_menu_cmd (struct WEdit * edit_widget, const char *menu_file, int selected_entry)
{
    char *p;
    char *data, **entries;
    int max_cols, menu_lines, menu_limit;
    int col, i, accept_entry = 1;
    int selected, old_patterns;
    Listbox *listbox;
    gboolean res = FALSE;
    gboolean interactive = TRUE;

    if (!vfs_current_is_local ())
    {
        message (D_ERROR, MSG_ERROR, "%s", _("Cannot execute commands on non-local filesystems"));
        return FALSE;
    }
    if (menu_file != NULL)
        menu = g_strdup (menu_file);
    else
        menu = g_strdup (edit_widget ? EDIT_LOCAL_MENU : MC_LOCAL_MENU);
    if (!exist_file (menu) || !menu_file_own (menu))
    {
        if (menu_file != NULL)
        {
            message (D_ERROR, MSG_ERROR, _("Cannot open file %s\n%s"), menu,
                     unix_error_string (errno));
            g_free (menu);
            menu = NULL;
            return FALSE;
        }

        g_free (menu);
        if (edit_widget)
            menu = mc_config_get_full_path (EDIT_HOME_MENU);
        else
            menu = mc_config_get_full_path (MC_USERMENU_FILE);


        if (!exist_file (menu))
        {
            g_free (menu);
            menu =
                mc_build_filename (mc_config_get_home_dir (),
                                   edit_widget ? EDIT_GLOBAL_MENU : MC_GLOBAL_MENU, NULL);
            if (!exist_file (menu))
            {
                g_free (menu);
                menu =
                    mc_build_filename (mc_global.sysconfig_dir,
                                       edit_widget ? EDIT_GLOBAL_MENU : MC_GLOBAL_MENU, NULL);
                if (!exist_file (menu))
                {
                    g_free (menu);
                    menu = mc_build_filename
                        (mc_global.share_data_dir, edit_widget ? EDIT_GLOBAL_MENU : MC_GLOBAL_MENU,
                         NULL);
                }
            }
        }
    }

    if (!g_file_get_contents (menu, &data, NULL, NULL))
    {
        message (D_ERROR, MSG_ERROR, _("Cannot open file%s\n%s"), menu, unix_error_string (errno));
        g_free (menu);
        menu = NULL;
        return FALSE;
    }

    max_cols = 0;
    selected = 0;
    menu_limit = 0;
    entries = 0;

    /* Parse the menu file */
    old_patterns = easy_patterns;
    p = check_patterns (data);
    for (menu_lines = col = 0; *p; str_next_char (&p))
    {
        if (menu_lines >= menu_limit)
        {
            char **new_entries;

            menu_limit += MAX_ENTRIES;
            new_entries = g_try_realloc (entries, sizeof (new_entries[0]) * menu_limit);

            if (new_entries == NULL)
                break;

            entries = new_entries;
            new_entries += menu_limit;
            while (--new_entries >= &entries[menu_lines])
                *new_entries = NULL;
        }
        if (col == 0 && !entries[menu_lines])
        {
            if (*p == '#')
            {
                /* show prompt if first line of external script is #interactive */
                if (selected_entry >= 0 && strncmp (p, "#silent", 7) == 0)
                    interactive = FALSE;
                /* A commented menu entry */
                accept_entry = 1;
            }
            else if (*p == '+')
            {
                if (*(p + 1) == '=')
                {
                    /* Combined adding and default */
                    p = test_line (edit_widget, p + 1, &accept_entry);
                    if (selected == 0 && accept_entry)
                        selected = menu_lines;
                }
                else
                {
                    /* A condition for adding the entry */
                    p = test_line (edit_widget, p, &accept_entry);
                }
            }
            else if (*p == '=')
            {
                if (*(p + 1) == '+')
                {
                    /* Combined adding and default */
                    p = test_line (edit_widget, p + 1, &accept_entry);
                    if (selected == 0 && accept_entry)
                        selected = menu_lines;
                }
                else
                {
                    /* A condition for making the entry default */
                    i = 1;
                    p = test_line (edit_widget, p, &i);
                    if (selected == 0 && i)
                        selected = menu_lines;
                }
            }
            else if (*p != ' ' && *p != '\t' && str_isprint (p))
            {
                /* A menu entry title line */
                if (accept_entry)
                    entries[menu_lines] = p;
                else
                    accept_entry = 1;
            }
        }
        if (*p == '\n')
        {
            if (entries[menu_lines])
            {
                menu_lines++;
                accept_entry = 1;
            }
            max_cols = max (max_cols, col);
            col = 0;
        }
        else
        {
            if (*p == '\t')
                *p = ' ';
            col++;
        }
    }

    if (menu_lines == 0)
    {
        message (D_ERROR, MSG_ERROR, _("No suitable entries found in %s"), menu);
        res = FALSE;
    }
    else
    {
        if (selected_entry >= 0)
            selected = selected_entry;
        else
        {
            max_cols = min (max (max_cols, col), MAX_ENTRY_LEN);

            /* Create listbox */
            listbox = create_listbox_window (menu_lines, max_cols + 2, _("User menu"),
                                             "[Menu File Edit]");
            /* insert all the items found */
            for (i = 0; i < menu_lines; i++)
            {
                p = entries[i];
                LISTBOX_APPEND_TEXT (listbox, (unsigned char) p[0],
                                     extract_line (p, p + MAX_ENTRY_LEN), p);
            }
            /* Select the default entry */
            listbox_select_entry (listbox->list, selected);

            selected = run_listbox (listbox);
        }
        if (selected >= 0)
        {
            execute_menu_command (edit_widget, entries[selected], interactive);
            res = TRUE;
        }

        do_refresh ();
    }

    easy_patterns = old_patterns;
    g_free (menu);
    menu = NULL;
    g_free (entries);
    g_free (data);
    return res;
}

/* --------------------------------------------------------------------------------------------- */