Initial bits to start work on revamping the buildsystem

1 files changed, 711 insertions, 0 deletions

diff --git a/scripts/kconfig/mconf.c b/scripts/kconfig/mconf.c
new file mode 100644
index 0000000..84699be
--- a/dev/null
+++ b/scripts/kconfig/mconf.c
@@ -0,0 +1,711 @@
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <sys/ioctl.h>
+#include <sys/wait.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define LKC_DIRECT_LINK
+#include "lkc.h"
+
+static char menu_backtitle[128];
+static const char menu_instructions[] =
+	"Arrow keys navigate the menu.  "
+	"<Enter> selects submenus --->.  "
+	"Highlighted letters are hotkeys.  "
+	"Pressing <Y> includes, <N> excludes, <M> modularizes features.  "
+	"Press <Esc><Esc> to exit, <?> for Help.  "
+	"Legend: [*] built-in  [ ] excluded  <M> module  < > module capable",
+radiolist_instructions[] =
+	"Use the arrow keys to navigate this window or "
+	"press the hotkey of the item you wish to select "
+	"followed by the <SPACE BAR>. "
+	"Press <?> for additional information about this option.",
+inputbox_instructions_int[] =
+	"Please enter a decimal value. "
+	"Fractions will not be accepted.  "
+	"Use the <TAB> key to move from the input field to the buttons below it.",
+inputbox_instructions_hex[] =
+	"Please enter a hexadecimal value. "
+	"Use the <TAB> key to move from the input field to the buttons below it.",
+inputbox_instructions_string[] =
+	"Please enter a string value. "
+	"Use the <TAB> key to move from the input field to the buttons below it.",
+setmod_text[] =
+	"This feature depends on another which has been configured as a module.\n"
+	"As a result, this feature will be built as a module.",
+nohelp_text[] =
+	"There is no help available for this kernel option.\n",
+load_config_text[] =
+	"Enter the name of the configuration file you wish to load.  "
+	"Accept the name shown to restore the configuration you "
+	"last retrieved.  Leave blank to abort.",
+load_config_help[] =
+	"\n"
+	"For various reasons, one may wish to keep several different kernel\n"
+	"configurations available on a single machine.\n"
+	"\n"
+	"If you have saved a previous configuration in a file other than the\n"
+	"kernel's default, entering the name of the file here will allow you\n"
+	"to modify that configuration.\n"
+	"\n"
+	"If you are uncertain, then you have probably never used alternate\n"
+	"configuration files.  You should therefor leave this blank to abort.\n",
+save_config_text[] =
+	"Enter a filename to which this configuration should be saved "
+	"as an alternate.  Leave blank to abort.",
+save_config_help[] =
+	"\n"
+	"For various reasons, one may wish to keep different kernel\n"
+	"configurations available on a single machine.\n"
+	"\n"
+	"Entering a file name here will allow you to later retrieve, modify\n"
+	"and use the current configuration as an alternate to whatever\n"
+	"configuration options you have selected at that time.\n"
+	"\n"
+	"If you are uncertain what all this means then you should probably\n"
+	"leave this blank.\n"
+;
+
+static char buf[4096], *bufptr = buf;
+static char input_buf[4096];
+static char *args[1024], **argptr = args;
+static int indent = 0;
+static int rows, cols;
+static struct menu *current_menu;
+static int child_count;
+static int do_resize;
+
+static void conf(struct menu *menu);
+static void conf_choice(struct menu *menu);
+static void conf_string(struct menu *menu);
+static void conf_load(void);
+static void conf_save(void);
+static void show_textbox(const char *title, const char *text, int r, int c);
+static void show_helptext(const char *title, const char *text);
+static void show_help(struct menu *menu);
+static void show_readme(void);
+
+static void cprint_init(void);
+static int cprint1(const char *fmt, ...);
+static void cprint_done(void);
+static int cprint(const char *fmt, ...);
+
+static void init_wsize(void)
+{
+	struct winsize ws;
+
+	if (ioctl(1, TIOCGWINSZ, &ws) == -1) {
+		rows = 24;
+		cols = 80;
+	} else {
+		rows = ws.ws_row;
+		cols = ws.ws_col;
+	}
+
+	if (rows < 19 || cols < 80) {
+		fprintf(stderr, "Your display is too small to run Menuconfig!\n");
+		fprintf(stderr, "It must be at least 19 lines by 80 columns.\n");
+		exit(1);
+	}
+
+	rows -= 4;
+	cols -= 5;
+}
+
+static void cprint_init(void)
+{
+	bufptr = buf;
+	argptr = args;
+	memset(args, 0, sizeof(args));
+	indent = 0;
+	child_count = 0;
+	cprint("./scripts/lxdialog/lxdialog");
+	cprint("--backtitle");
+	cprint(menu_backtitle);
+}
+
+static int cprint1(const char *fmt, ...)
+{
+	va_list ap;
+	int res;
+
+	if (!*argptr)
+		*argptr = bufptr;
+	va_start(ap, fmt);
+	res = vsprintf(bufptr, fmt, ap);
+	va_end(ap);
+	bufptr += res;
+
+	return res;
+}
+
+static void cprint_done(void)
+{
+	*bufptr++ = 0;
+	argptr++;
+}
+
+static int cprint(const char *fmt, ...)
+{
+	va_list ap;
+	int res;
+
+	*argptr++ = bufptr;
+	va_start(ap, fmt);
+	res = vsprintf(bufptr, fmt, ap);
+	va_end(ap);
+	bufptr += res;
+	*bufptr++ = 0;
+
+	return res;
+}
+
+pid_t pid;
+
+static void winch_handler(int sig)
+{
+	if (!do_resize) {
+		kill(pid, SIGINT);
+		do_resize = 1;
+	}
+}
+
+static int exec_conf(void)
+{
+	int pipefd[2], stat, size;
+	struct sigaction sa;
+	sigset_t sset, osset;
+
+	sigemptyset(&sset);
+	sigaddset(&sset, SIGINT);
+	sigprocmask(SIG_BLOCK, &sset, &osset);
+
+	signal(SIGINT, SIG_DFL);
+
+	sa.sa_handler = winch_handler;
+	sigemptyset(&sa.sa_mask);
+	sa.sa_flags = SA_RESTART;
+	sigaction(SIGWINCH, &sa, NULL);
+
+	*argptr++ = NULL;
+
+	pipe(pipefd);
+	pid = fork();
+	if (pid == 0) {
+		sigprocmask(SIG_SETMASK, &osset, NULL);
+		dup2(pipefd[1], 2);
+		close(pipefd[0]);
+		close(pipefd[1]);
+		execv(args[0], args);
+		_exit(EXIT_FAILURE);
+	}
+
+	close(pipefd[1]);
+	bufptr = input_buf;
+	while (1) {
+		size = input_buf + sizeof(input_buf) - bufptr;
+		size = read(pipefd[0], bufptr, size);
+		if (size <= 0) {
+			if (size < 0) {
+				if (errno == EINTR || errno == EAGAIN)
+					continue;
+				perror("read");
+			}
+			break;
+		}
+		bufptr += size;
+	}
+	*bufptr++ = 0;
+	close(pipefd[0]);
+	waitpid(pid, &stat, 0);
+
+	if (do_resize) {
+		init_wsize();
+		do_resize = 0;
+		sigprocmask(SIG_SETMASK, &osset, NULL);
+		return -1;
+	}
+	if (WIFSIGNALED(stat)) {
+		printf("\finterrupted(%d)\n", WTERMSIG(stat));
+		exit(1);
+	}
+#if 0
+	printf("\fexit state: %d\nexit data: '%s'\n", WEXITSTATUS(stat), input_buf);
+	sleep(1);
+#endif
+	sigpending(&sset);
+	if (sigismember(&sset, SIGINT)) {
+		printf("\finterrupted\n");
+		exit(1);
+	}
+	sigprocmask(SIG_SETMASK, &osset, NULL);
+
+	return WEXITSTATUS(stat);
+}
+
+static void build_conf(struct menu *menu)
+{
+	struct symbol *sym;
+	struct property *prop;
+	struct menu *child;
+	int type, tmp, doint = 2;
+	tristate val;
+	char ch;
+
+	if (!menu_is_visible(menu))
+		return;
+
+	sym = menu->sym;
+	prop = menu->prompt;
+	if (!sym) {
+		if (prop && menu != current_menu) {
+			const char *prompt = menu_get_prompt(menu);
+			switch (prop->type) {
+			case P_MENU:
+				child_count++;
+				cprint("m%p", menu);
+				if (menu->parent != &rootmenu)
+					cprint1("   %*c", indent + 1, ' ');
+				cprint1("%s  --->", prompt);
+				cprint_done();
+				return;
+			default:
+				if (prompt) {
+					child_count++;
+					cprint(":%p", menu);
+					cprint("---%*c%s", indent + 1, ' ', prompt);
+				}
+			}
+		} else
+			doint = 0;
+		goto conf_childs;
+	}
+
+	type = sym_get_type(sym);
+	if (sym_is_choice(sym)) {
+		struct symbol *def_sym = sym_get_choice_value(sym);
+		struct menu *def_menu = NULL;
+
+		child_count++;
+		for (child = menu->list; child; child = child->next) {
+			if (menu_is_visible(child) && child->sym == def_sym)
+				def_menu = child;
+		}
+
+		val = sym_get_tristate_value(sym);
+		if (sym_is_changable(sym)) {
+			cprint("t%p", menu);
+			switch (type) {
+			case S_BOOLEAN:
+				cprint1("[%c]", val == no ? ' ' : '*');
+				break;
+			case S_TRISTATE:
+				switch (val) {
+				case yes: ch = '*'; break;
+				case mod: ch = 'M'; break;
+				default:  ch = ' '; break;
+				}
+				cprint1("<%c>", ch);
+				break;
+			}
+		} else {
+			cprint("%c%p", def_menu ? 't' : ':', menu);
+			cprint1("   ");
+		}
+
+		cprint1("%*c%s", indent + 1, ' ', menu_get_prompt(menu));
+		if (val == yes) {
+			if (def_menu) {
+				cprint1(" (%s)", menu_get_prompt(def_menu));
+				cprint1("  --->");
+				cprint_done();
+				if (def_menu->list) {
+					indent += 2;
+					build_conf(def_menu);
+					indent -= 2;
+				}
+			} else
+				cprint_done();
+			return;
+		}
+		cprint_done();
+	} else {
+		child_count++;
+		val = sym_get_tristate_value(sym);
+		if (sym_is_choice_value(sym) && val == yes) {
+			cprint(":%p", menu);
+			cprint1("   ");
+		} else {
+			switch (type) {
+			case S_BOOLEAN:
+				cprint("t%p", menu);
+				cprint1("[%c]", val == no ? ' ' : '*');
+				break;
+			case S_TRISTATE:
+				cprint("t%p", menu);
+				switch (val) {
+				case yes: ch = '*'; break;
+				case mod: ch = 'M'; break;
+				default:  ch = ' '; break;
+				}
+				cprint1("<%c>", ch);
+				break;
+			default:
+				cprint("s%p", menu);
+				tmp = cprint1("(%s)", sym_get_string_value(sym));
+				tmp = indent - tmp + 4;
+				if (tmp < 0)
+					tmp = 0;
+				cprint1("%*c%s%s", tmp, ' ', menu_get_prompt(menu),
+					sym_has_value(sym) ? "" : " (NEW)");
+				cprint_done();
+				goto conf_childs;
+			}
+		}
+		cprint1("%*c%s%s", indent + 1, ' ', menu_get_prompt(menu),
+			sym_has_value(sym) ? "" : " (NEW)");
+		cprint_done();
+	}
+
+conf_childs:
+	indent += doint;
+	for (child = menu->list; child; child = child->next)
+		build_conf(child);
+	indent -= doint;
+}
+
+static void conf(struct menu *menu)
+{
+	struct menu *submenu;
+	const char *prompt = menu_get_prompt(menu);
+	struct symbol *sym;
+	char active_entry[40];
+	int stat, type, i;
+
+	active_entry[0] = 0;
+	while (1) {
+		cprint_init();
+		cprint("--title");
+		cprint("%s", prompt ? prompt : "Main Menu");
+		cprint("--menu");
+		cprint(menu_instructions);
+		cprint("%d", rows);
+		cprint("%d", cols);
+		cprint("%d", rows - 10);
+		cprint("%s", active_entry);
+		current_menu = menu;
+		build_conf(menu);
+		if (!child_count)
+			break;
+		if (menu == &rootmenu) {
+			cprint(":");
+			cprint("--- ");
+			cprint("L");
+			cprint("Load an Alternate Configuration File");
+			cprint("S");
+			cprint("Save Configuration to an Alternate File");
+		}
+		stat = exec_conf();
+		if (stat < 0)
+			continue;
+
+		if (stat == 1 || stat == 255)
+			break;
+
+		type = input_buf[0];
+		if (!type)
+			continue;
+
+		for (i = 0; input_buf[i] && !isspace(input_buf[i]); i++)
+			;
+		if (i >= sizeof(active_entry))
+			i = sizeof(active_entry) - 1;
+		input_buf[i] = 0;
+		strcpy(active_entry, input_buf);
+
+		sym = NULL;
+		submenu = NULL;
+		if (sscanf(input_buf + 1, "%p", &submenu) == 1)
+			sym = submenu->sym;
+
+		switch (stat) {
+		case 0:
+			switch (type) {
+			case 'm':
+				conf(submenu);
+				break;
+			case 't':
+				if (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)
+					conf_choice(submenu);
+				break;
+			case 's':
+				conf_string(submenu);
+				break;
+			case 'L':
+				conf_load();
+				break;
+			case 'S':
+				conf_save();
+				break;
+			}
+			break;
+		case 2:
+			if (sym)
+				show_help(submenu);
+			else
+				show_readme();
+			break;
+		case 3:
+			if (type == 't') {
+				if (sym_set_tristate_value(sym, yes))
+					break;
+				if (sym_set_tristate_value(sym, mod))
+					show_textbox(NULL, setmod_text, 6, 74);
+			}
+			break;
+		case 4:
+			if (type == 't')
+				sym_set_tristate_value(sym, no);
+			break;
+		case 5:
+			if (type == 't')
+				sym_set_tristate_value(sym, mod);
+			break;
+		case 6:
+			if (type == 't')
+				sym_toggle_tristate_value(sym);
+			break;
+		}
+	}
+}
+
+static void show_textbox(const char *title, const char *text, int r, int c)
+{
+	int fd;
+
+	fd = creat(".help.tmp", 0777);
+	write(fd, text, strlen(text));
+	close(fd);
+	do {
+		cprint_init();
+		if (title) {
+			cprint("--title");
+			cprint("%s", title);
+		}
+		cprint("--textbox");
+		cprint(".help.tmp");
+		cprint("%d", r);
+		cprint("%d", c);
+	} while (exec_conf() < 0);
+	unlink(".help.tmp");
+}
+
+static void show_helptext(const char *title, const char *text)
+{
+	show_textbox(title, text, rows, cols);
+}
+
+static void show_help(struct menu *menu)
+{
+	const char *help;
+
+	help = menu->sym->help;
+	if (!help)
+		help = nohelp_text;
+	show_helptext(menu_get_prompt(menu), help);
+}
+
+static void show_readme(void)
+{
+	do {
+		cprint_init();
+		cprint("--textbox");
+		cprint("scripts/README.Menuconfig");
+		cprint("%d", rows);
+		cprint("%d", cols);
+	} while (exec_conf() == -1);
+}
+
+static void conf_choice(struct menu *menu)
+{
+	const char *prompt = menu_get_prompt(menu);
+	struct menu *child;
+	struct symbol *active;
+	int stat;
+
+	while (1) {
+		cprint_init();
+		cprint("--title");
+		cprint("%s", prompt ? prompt : "Main Menu");
+		cprint("--radiolist");
+		cprint(radiolist_instructions);
+		cprint("15");
+		cprint("70");
+		cprint("6");
+
+		current_menu = menu;
+		active = sym_get_choice_value(menu->sym);
+		for (child = menu->list; child; child = child->next) {
+			if (!menu_is_visible(child))
+				continue;
+			cprint("%p", child);
+			cprint("%s", menu_get_prompt(child));
+			cprint(child->sym == active ? "ON" : "OFF");
+		}
+
+		stat = exec_conf();
+		switch (stat) {
+		case 0:
+			if (sscanf(input_buf, "%p", &menu) != 1)
+				break;
+			sym_set_tristate_value(menu->sym, yes);
+			return;
+		case 1:
+			show_help(menu);
+			break;
+		case 255:
+			return;
+		}
+	}
+}
+
+static void conf_string(struct menu *menu)
+{
+	const char *prompt = menu_get_prompt(menu);
+	int stat;
+
+	while (1) {
+		cprint_init();
+		cprint("--title");
+		cprint("%s", prompt ? prompt : "Main Menu");
+		cprint("--inputbox");
+		switch (sym_get_type(menu->sym)) {
+		case S_INT:
+			cprint(inputbox_instructions_int);
+			break;
+		case S_HEX:
+			cprint(inputbox_instructions_hex);
+			break;
+		case S_STRING:
+			cprint(inputbox_instructions_string);
+			break;
+		default:
+			/* panic? */;
+		}
+		cprint("10");
+		cprint("75");
+		cprint("%s", sym_get_string_value(menu->sym));
+		stat = exec_conf();
+		switch (stat) {
+		case 0:
+			if (sym_set_string_value(menu->sym, input_buf))
+				return;
+			show_textbox(NULL, "You have made an invalid entry.", 5, 43);
+			break;
+		case 1:
+			show_help(menu);
+			break;
+		case 255:
+			return;
+		}
+	}
+}
+
+static void conf_load(void)
+{
+	int stat;
+
+	while (1) {
+		cprint_init();
+		cprint("--inputbox");
+		cprint(load_config_text);
+		cprint("11");
+		cprint("55");
+		cprint("%s", conf_filename);
+		stat = exec_conf();
+		switch(stat) {
+		case 0:
+			if (!input_buf[0])
+				return;
+			if (!conf_read(input_buf))
+				return;
+			show_textbox(NULL, "File does not exist!", 5, 38);
+			break;
+		case 1:
+			show_helptext("Load Alternate Configuration", load_config_help);
+			break;
+		case 255:
+			return;
+		}
+	}
+}
+
+static void conf_save(void)
+{
+	int stat;
+
+	while (1) {
+		cprint_init();
+		cprint("--inputbox");
+		cprint(save_config_text);
+		cprint("11");
+		cprint("55");
+		cprint("%s", conf_filename);
+		stat = exec_conf();
+		switch(stat) {
+		case 0:
+			if (!input_buf[0])
+				return;
+			if (!conf_write(input_buf))
+				return;
+			show_textbox(NULL, "Can't create file!  Probably a nonexistent directory.", 5, 60);
+			break;
+		case 1:
+			show_helptext("Save Alternate Configuration", save_config_help);
+			break;
+		case 255:
+			return;
+		}
+	}
+}
+
+int main(int ac, char **av)
+{
+	int stat;
+	conf_parse(av[1]);
+	conf_read(NULL);
+
+	sprintf(menu_backtitle, "Configuration");
+
+	init_wsize();
+	conf(&rootmenu);
+
+	do {
+		cprint_init();
+		cprint("--yesno");
+		cprint("Do you wish to save your new configuration?");
+		cprint("5");
+		cprint("60");
+		stat = exec_conf();
+	} while (stat < 0);
+
+	if (stat == 0) {
+		conf_write(NULL);
+		printf("\n\n"
+			"*** End of configuration.\n"
+			"*** Check the top-level Makefile for additional configuration.\n");
+	} else
+		printf("\n\nYour configuration changes were NOT saved.\n\n");
+
+	return 0;
+}