base/config/kconfig/conf.c

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/*
 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
 * Released under the terms of the GNU GPL v2.0.
 */

#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <sys/stat.h>

#define LKC_DIRECT_LINK
#include "lkc.h"

static void conf(struct menu *menu);
static void check_conf(struct menu *menu);

enum {
    ask_all,
    ask_new,
    ask_silent,
    set_default,
    set_yes,
    set_mod,
    set_no,
    set_random
} input_mode = ask_all;
char *defconfig_file;

static int indent = 1;
static int valid_stdin = 1;
static int conf_cnt;
static char line[128];
static struct menu *rootEntry;

static char nohelp_text[] = "Sorry, no help available for this option yet.\n";

static void strip(char *str)
{
    char *p = str;
    int l;

    while ((isspace(*p)))
        p++;
    l = strlen(p);
    if (p != str)
        memmove(str, p, l + 1);
    if (!l)
        return;
    p = str + l - 1;
    while ((isspace(*p)))
        *p-- = 0;
}

static void check_stdin(void)
{
    if (!valid_stdin && input_mode == ask_silent) {
        printf("aborted!\n\n");
        printf("Console input/output is redirected. ");
        printf("Run 'make oldconfig' to update configuration.\n\n");
        exit(1);
    }
}

static void conf_askvalue(struct symbol *sym, const char *def)
{
    enum symbol_type type = sym_get_type(sym);
    tristate val;

    if (!sym_has_value(sym))
        printf("(NEW) ");

    line[0] = '\n';
    line[1] = 0;

    if (!sym_is_changable(sym)) {
        printf("%s\n", def);
        line[0] = '\n';
        line[1] = 0;
        return;
    }

    switch (input_mode) {
    case ask_new:
    case ask_silent:
        if (sym_has_value(sym)) {
            printf("%s\n", def);
            return;
        }
        check_stdin();
    case ask_all:
        fflush(stdout);
        fgets(line, 128, stdin);
        return;
    case set_default:
        printf("%s\n", def);
        return;
    default:
        break;
    }

    switch (type) {
    case S_INT:
    case S_HEX:
    case S_STRING:
        printf("%s\n", def);
        return;
    default:
        ;
    }
    switch (input_mode) {
    case set_yes:
        if (sym_tristate_within_range(sym, yes)) {
            line[0] = 'y';
            line[1] = '\n';
            line[2] = 0;
            break;
        }
    case set_mod:
        if (type == S_TRISTATE) {
            if (sym_tristate_within_range(sym, mod)) {
                line[0] = 'm';
                line[1] = '\n';
                line[2] = 0;
                break;
            }
        } else {
            if (sym_tristate_within_range(sym, yes)) {
                line[0] = 'y';
                line[1] = '\n';
                line[2] = 0;
                break;
            }
        }
    case set_no:
        if (sym_tristate_within_range(sym, no)) {
            line[0] = 'n';
            line[1] = '\n';
            line[2] = 0;
            break;
        }
    case set_random:
        do {
            val = (tristate)(random() % 3);
        } while (!sym_tristate_within_range(sym, val));
        switch (val) {
        case no: line[0] = 'n'; break;
        case mod: line[0] = 'm'; break;
        case yes: line[0] = 'y'; break;
        }
        line[1] = '\n';
        line[2] = 0;
        break;
    default:
        break;
    }
    printf("%s", line);
}

int conf_string(struct menu *menu)
{
    struct symbol *sym = menu->sym;
    const char *def, *help;

    while (1) {
        printf("%*s%s ", indent - 1, "", menu->prompt->text);
        printf("(%s) ", sym->name);
        def = sym_get_string_value(sym);
        if (sym_get_string_value(sym))
            printf("[%s] ", def);
        conf_askvalue(sym, def);
        switch (line[0]) {
        case '\n':
            break;
        case '?':
            /* print help */
            if (line[1] == 0) {
                help = nohelp_text;
                if (menu->sym->help)
                    help = menu->sym->help;
                printf("\n%s\n", menu->sym->help);
                def = NULL;
                break;
            }
        default:
            line[strlen(line)-1] = 0;
            def = line;
        }
        if (def && sym_set_string_value(sym, def))
            return 0;
    }
}

static int conf_sym(struct menu *menu)
{
    struct symbol *sym = menu->sym;
    int type;
    tristate oldval, newval;
    const char *help;

    while (1) {
        printf("%*s%s ", indent - 1, "", menu->prompt->text);
        if (sym->name)
            printf("(%s) ", sym->name);
        type = sym_get_type(sym);
        putchar('[');
        oldval = sym_get_tristate_value(sym);
        switch (oldval) {
        case no:
            putchar('N');
            break;
        case mod:
            putchar('M');
            break;
        case yes:
            putchar('Y');
            break;
        }
        if (oldval != no && sym_tristate_within_range(sym, no))
            printf("/n");
        if (oldval != mod && sym_tristate_within_range(sym, mod))
            printf("/m");
        if (oldval != yes && sym_tristate_within_range(sym, yes))
            printf("/y");
        if (sym->help)
            printf("/?");
        printf("] ");
        conf_askvalue(sym, sym_get_string_value(sym));
        strip(line);

        switch (line[0]) {
        case 'n':
        case 'N':
            newval = no;
            if (!line[1] || !strcmp(&line[1], "o"))
                break;
            continue;
        case 'm':
        case 'M':
            newval = mod;
            if (!line[1])
                break;
            continue;
        case 'y':
        case 'Y':
            newval = yes;
            if (!line[1] || !strcmp(&line[1], "es"))
                break;
            continue;
        case 0:
            newval = oldval;
            break;
        case '?':
            goto help;
        default:
            continue;
        }
        if (sym_set_tristate_value(sym, newval))
            return 0;
help:
        help = nohelp_text;
        if (sym->help)
            help = sym->help;
        printf("\n%s\n", help);
    }
}

static int conf_choice(struct menu *menu)
{
    struct symbol *sym, *def_sym;
    struct menu *child;
    int type;
    bool is_new;

    sym = menu->sym;
    type = sym_get_type(sym);
    is_new = !sym_has_value(sym);
    if (sym_is_changable(sym)) {
        conf_sym(menu);
        sym_calc_value(sym);
        switch (sym_get_tristate_value(sym)) {
        case no:
            return 1;
        case mod:
            return 0;
        case yes:
            break;
        }
    } else {
        switch (sym_get_tristate_value(sym)) {
        case no:
            return 1;
        case mod:
            printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
            return 0;
        case yes:
            break;
        }
    }

    while (1) {
        int cnt, def;

        printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
        def_sym = sym_get_choice_value(sym);
        cnt = def = 0;
        line[0] = '0';
        line[1] = 0;
        for (child = menu->list; child; child = child->next) {
            if (!menu_is_visible(child))
                continue;
            if (!child->sym) {
                printf("%*c %s\n", indent, '*', menu_get_prompt(child));
                continue;
            }
            cnt++;
            if (child->sym == def_sym) {
                def = cnt;
                printf("%*c", indent, '>');
            } else
                printf("%*c", indent, ' ');
            printf(" %d. %s", cnt, menu_get_prompt(child));
            if (child->sym->name)
                printf(" (%s)", child->sym->name);
            if (!sym_has_value(child->sym))
                printf(" (NEW)");
            printf("\n");
        }
        printf("%*schoice", indent - 1, "");
        if (cnt == 1) {
            printf("[1]: 1\n");
            goto conf_childs;
        }
        printf("[1-%d", cnt);
        if (sym->help)
            printf("?");
        printf("]: ");
        switch (input_mode) {
        case ask_new:
        case ask_silent:
            if (!is_new) {
                cnt = def;
                printf("%d\n", cnt);
                break;
            }
            check_stdin();
        case ask_all:
            fflush(stdout);
            fgets(line, 128, stdin);
            strip(line);
            if (line[0] == '?') {
                printf("\n%s\n", menu->sym->help ?
                    menu->sym->help : nohelp_text);
                continue;
            }
            if (!line[0])
                cnt = def;
            else if (isdigit(line[0]))
                cnt = atoi(line);
            else
                continue;
            break;
        case set_random:
            def = (random() % cnt) + 1;
        case set_default:
        case set_yes:
        case set_mod:
        case set_no:
            cnt = def;
            printf("%d\n", cnt);
            break;
        }

    conf_childs:
        for (child = menu->list; child; child = child->next) {
            if (!child->sym || !menu_is_visible(child))
                continue;
            if (!--cnt)
                break;
        }
        if (!child)
            continue;
        if (line[strlen(line) - 1] == '?') {
            printf("\n%s\n", child->sym->help ?
                child->sym->help : nohelp_text);
            continue;
        }
        sym_set_choice_value(sym, child->sym);
        if (child->list) {
            indent += 2;
            conf(child->list);
            indent -= 2;
        }
        return 1;
    }
}

static void conf(struct menu *menu)
{
    struct symbol *sym;
    struct property *prop;
    struct menu *child;

    if (!menu_is_visible(menu))
        return;

    sym = menu->sym;
    prop = menu->prompt;
    if (prop) {
        const char *prompt;

        switch (prop->type) {
        case P_MENU:
            if (input_mode == ask_silent && rootEntry != menu) {
                check_conf(menu);
                return;
            }
        case P_COMMENT:
            prompt = menu_get_prompt(menu);
            if (prompt)
                printf("%*c\n%*c %s\n%*c\n",
                    indent, '*',
                    indent, '*', prompt,
                    indent, '*');
        default:
            ;
        }
    }

    if (!sym)
        goto conf_childs;

    if (sym_is_choice(sym)) {
        conf_choice(menu);
        if (sym->curr.tri != mod)
            return;
        goto conf_childs;
    }

    switch (sym->type) {
    case S_INT:
    case S_HEX:
    case S_STRING:
        conf_string(menu);
        break;
    default:
        conf_sym(menu);
        break;
    }

conf_childs:
    if (sym)
        indent += 2;
    for (child = menu->list; child; child = child->next)
        conf(child);
    if (sym)
        indent -= 2;
}

static void check_conf(struct menu *menu)
{
    struct symbol *sym;
    struct menu *child;

    if (!menu_is_visible(menu))
        return;

    sym = menu->sym;
    if (sym) {
        if (sym_is_changable(sym) && !sym_has_value(sym)) {
            if (!conf_cnt++)
                printf("*\n* Restart config...\n*\n");
            rootEntry = menu_get_parent_menu(menu);
            conf(rootEntry);
        }
        if (sym_is_choice(sym) && sym_get_tristate_value(sym) != mod)
            return;
    }

    for (child = menu->list; child; child = child->next)
        check_conf(child);
}

int main(int ac, char **av)
{
    int i = 1;
    const char *name;
    struct stat tmpstat;

    if (ac > i && av[i][0] == '-') {
        switch (av[i++][1]) {
        case 'o':
            input_mode = ask_new;
            break;
        case 's':
            input_mode = ask_silent;
            valid_stdin = isatty(0) && isatty(1) && isatty(2);
            break;
        case 'd':
            input_mode = set_default;
            break;
        case 'D':
            input_mode = set_default;
            defconfig_file = av[i++];
            if (!defconfig_file) {
                printf("%s: No default config file specified\n",
                    av[0]);
                exit(1);
            }
            break;
        case 'n':
            input_mode = set_no;
            break;
        case 'm':
            input_mode = set_mod;
            break;
        case 'y':
            input_mode = set_yes;
            break;
        case 'r':
            input_mode = set_random;
            srandom(time(NULL));
            break;
        case 'h':
        case '?':
            printf("%s [-o|-s] config\n", av[0]);
            exit(0);
        }
    }
    name = av[i];
    if (!name) {
        printf("%s: Kconfig file missing\n", av[0]);
    }
    conf_parse(name);
    //zconfdump(stdout);
    switch (input_mode) {
    case set_default:
        if (!defconfig_file)
            defconfig_file = conf_get_default_confname();
        if (conf_read(defconfig_file)) {
            printf("***\n"
                "*** Can't find default configuration \"%s\"!\n"
                "***\n", defconfig_file);
            exit(1);
        }
        break;
    case ask_silent:
        if (stat("../../../.rtai_config", &tmpstat)) {
            printf("***\n"
                "*** You have not yet configured RTAI!\n"
                "***\n"
                "*** Please run some configurator (e.g. \"make oldconfig\" or\n"
                "*** \"make menuconfig\" or \"make xconfig\").\n"
                "***\n");
            exit(1);
        }
    case ask_all:
    case ask_new:
        conf_read(NULL);
        break;
    default:
        break;
    }

    if (input_mode != ask_silent) {
        rootEntry = &rootmenu;
        conf(&rootmenu);
        if (input_mode == ask_all) {
            input_mode = ask_silent;
            valid_stdin = 1;
        }
    }
    do {
        conf_cnt = 0;
        check_conf(&rootmenu);
    } while (conf_cnt);
    conf_write(NULL);
    return 0;
}

---