1266 lines
25 KiB
C
1266 lines
25 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
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*/
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "lkc.h"
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/* return true if 'path' exists, false otherwise */
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static bool is_present(const char *path)
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{
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struct stat st;
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return !stat(path, &st);
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}
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/* return true if 'path' exists and it is a directory, false otherwise */
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static bool is_dir(const char *path)
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{
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struct stat st;
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if (stat(path, &st))
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return false;
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return S_ISDIR(st.st_mode);
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}
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/* return true if the given two files are the same, false otherwise */
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static bool is_same(const char *file1, const char *file2)
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{
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int fd1, fd2;
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struct stat st1, st2;
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void *map1, *map2;
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bool ret = false;
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fd1 = open(file1, O_RDONLY);
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if (fd1 < 0)
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return ret;
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fd2 = open(file2, O_RDONLY);
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if (fd2 < 0)
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goto close1;
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ret = fstat(fd1, &st1);
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if (ret)
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goto close2;
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ret = fstat(fd2, &st2);
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if (ret)
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goto close2;
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if (st1.st_size != st2.st_size)
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goto close2;
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map1 = mmap(NULL, st1.st_size, PROT_READ, MAP_PRIVATE, fd1, 0);
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if (map1 == MAP_FAILED)
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goto close2;
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map2 = mmap(NULL, st2.st_size, PROT_READ, MAP_PRIVATE, fd2, 0);
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if (map2 == MAP_FAILED)
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goto close2;
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if (bcmp(map1, map2, st1.st_size))
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goto close2;
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ret = true;
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close2:
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close(fd2);
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close1:
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close(fd1);
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return ret;
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}
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/*
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* Create the parent directory of the given path.
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*
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* For example, if 'include/config/auto.conf' is given, create 'include/config'.
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*/
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static int make_parent_dir(const char *path)
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{
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char tmp[PATH_MAX + 1];
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char *p;
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strncpy(tmp, path, sizeof(tmp));
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tmp[sizeof(tmp) - 1] = 0;
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/* Remove the base name. Just return if nothing is left */
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p = strrchr(tmp, '/');
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if (!p)
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return 0;
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*(p + 1) = 0;
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/* Just in case it is an absolute path */
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p = tmp;
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while (*p == '/')
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p++;
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while ((p = strchr(p, '/'))) {
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*p = 0;
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/* skip if the directory exists */
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if (!is_dir(tmp) && mkdir(tmp, 0755))
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return -1;
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*p = '/';
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while (*p == '/')
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p++;
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}
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return 0;
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}
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static char depfile_path[PATH_MAX];
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static size_t depfile_prefix_len;
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/* touch depfile for symbol 'name' */
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static int conf_touch_dep(const char *name)
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{
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int fd;
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/* check overflow: prefix + name + '\0' must fit in buffer. */
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if (depfile_prefix_len + strlen(name) + 1 > sizeof(depfile_path))
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return -1;
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strcpy(depfile_path + depfile_prefix_len, name);
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fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
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if (fd == -1)
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return -1;
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close(fd);
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return 0;
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}
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static void conf_warning(const char *fmt, ...)
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__attribute__ ((format (printf, 1, 2)));
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static void conf_message(const char *fmt, ...)
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__attribute__ ((format (printf, 1, 2)));
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static const char *conf_filename;
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static int conf_lineno, conf_warnings;
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static void conf_warning(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
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vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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va_end(ap);
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conf_warnings++;
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}
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static void conf_default_message_callback(const char *s)
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{
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printf("#\n# ");
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printf("%s", s);
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printf("\n#\n");
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}
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static void (*conf_message_callback)(const char *s) =
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conf_default_message_callback;
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void conf_set_message_callback(void (*fn)(const char *s))
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{
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conf_message_callback = fn;
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}
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static void conf_message(const char *fmt, ...)
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{
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va_list ap;
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char buf[4096];
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if (!conf_message_callback)
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return;
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va_start(ap, fmt);
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vsnprintf(buf, sizeof(buf), fmt, ap);
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conf_message_callback(buf);
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va_end(ap);
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}
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const char *conf_get_configname(void)
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{
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char *name = getenv("KCONFIG_CONFIG");
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return name ? name : ".config";
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}
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static const char *conf_get_autoconfig_name(void)
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{
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char *name = getenv("KCONFIG_AUTOCONFIG");
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return name ? name : "include/config/auto.conf";
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}
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static const char *conf_get_autoheader_name(void)
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{
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char *name = getenv("KCONFIG_AUTOHEADER");
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return name ? name : "include/generated/autoconf.h";
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}
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static const char *conf_get_rustccfg_name(void)
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{
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char *name = getenv("KCONFIG_RUSTCCFG");
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return name ? name : "include/generated/rustc_cfg";
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}
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static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
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{
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char *p2;
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switch (sym->type) {
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case S_TRISTATE:
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if (p[0] == 'm') {
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sym->def[def].tri = mod;
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sym->flags |= def_flags;
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break;
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}
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/* fall through */
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case S_BOOLEAN:
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if (p[0] == 'y') {
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sym->def[def].tri = yes;
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sym->flags |= def_flags;
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break;
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}
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if (p[0] == 'n') {
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sym->def[def].tri = no;
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sym->flags |= def_flags;
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break;
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}
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if (def != S_DEF_AUTO)
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conf_warning("symbol value '%s' invalid for %s",
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p, sym->name);
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return 1;
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case S_STRING:
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/* No escaping for S_DEF_AUTO (include/config/auto.conf) */
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if (def != S_DEF_AUTO) {
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if (*p++ != '"')
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break;
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for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
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if (*p2 == '"') {
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*p2 = 0;
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break;
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}
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memmove(p2, p2 + 1, strlen(p2));
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}
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if (!p2) {
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conf_warning("invalid string found");
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return 1;
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}
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}
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/* fall through */
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case S_INT:
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case S_HEX:
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if (sym_string_valid(sym, p)) {
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sym->def[def].val = xstrdup(p);
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sym->flags |= def_flags;
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} else {
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if (def != S_DEF_AUTO)
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conf_warning("symbol value '%s' invalid for %s",
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p, sym->name);
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return 1;
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}
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break;
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default:
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;
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}
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return 0;
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}
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#define LINE_GROWTH 16
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static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
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{
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char *nline;
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size_t new_size = slen + 1;
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if (new_size > *n) {
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new_size += LINE_GROWTH - 1;
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new_size *= 2;
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nline = xrealloc(*lineptr, new_size);
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if (!nline)
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return -1;
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*lineptr = nline;
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*n = new_size;
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}
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(*lineptr)[slen] = c;
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return 0;
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}
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static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
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{
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char *line = *lineptr;
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size_t slen = 0;
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for (;;) {
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int c = getc(stream);
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switch (c) {
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case '\n':
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if (add_byte(c, &line, slen, n) < 0)
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goto e_out;
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slen++;
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/* fall through */
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case EOF:
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if (add_byte('\0', &line, slen, n) < 0)
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goto e_out;
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*lineptr = line;
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if (slen == 0)
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return -1;
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return slen;
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default:
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if (add_byte(c, &line, slen, n) < 0)
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goto e_out;
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slen++;
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}
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}
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e_out:
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line[slen-1] = '\0';
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*lineptr = line;
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return -1;
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}
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int conf_read_simple(const char *name, int def)
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{
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FILE *in = NULL;
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char *line = NULL;
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size_t line_asize = 0;
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char *p, *p2;
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struct symbol *sym;
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int i, def_flags;
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if (name) {
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in = zconf_fopen(name);
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} else {
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char *env;
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name = conf_get_configname();
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in = zconf_fopen(name);
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if (in)
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goto load;
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conf_set_changed(true);
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env = getenv("KCONFIG_DEFCONFIG_LIST");
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if (!env)
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return 1;
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while (1) {
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bool is_last;
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while (isspace(*env))
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env++;
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if (!*env)
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break;
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p = env;
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while (*p && !isspace(*p))
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p++;
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is_last = (*p == '\0');
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*p = '\0';
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in = zconf_fopen(env);
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if (in) {
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conf_message("using defaults found in %s",
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env);
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goto load;
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}
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if (is_last)
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break;
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env = p + 1;
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}
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}
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if (!in)
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return 1;
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load:
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conf_filename = name;
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conf_lineno = 0;
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conf_warnings = 0;
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def_flags = SYMBOL_DEF << def;
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for_all_symbols(i, sym) {
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sym->flags |= SYMBOL_CHANGED;
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sym->flags &= ~(def_flags|SYMBOL_VALID);
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if (sym_is_choice(sym))
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sym->flags |= def_flags;
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switch (sym->type) {
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case S_INT:
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case S_HEX:
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case S_STRING:
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if (sym->def[def].val)
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free(sym->def[def].val);
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/* fall through */
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default:
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sym->def[def].val = NULL;
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sym->def[def].tri = no;
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}
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}
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while (compat_getline(&line, &line_asize, in) != -1) {
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conf_lineno++;
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sym = NULL;
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if (line[0] == '#') {
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if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
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continue;
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p = strchr(line + 2 + strlen(CONFIG_), ' ');
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if (!p)
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continue;
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*p++ = 0;
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if (strncmp(p, "is not set", 10))
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continue;
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if (def == S_DEF_USER) {
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sym = sym_find(line + 2 + strlen(CONFIG_));
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if (!sym) {
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conf_set_changed(true);
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continue;
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}
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} else {
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sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
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if (sym->type == S_UNKNOWN)
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sym->type = S_BOOLEAN;
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}
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if (sym->flags & def_flags) {
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conf_warning("override: reassigning to symbol %s", sym->name);
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}
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switch (sym->type) {
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case S_BOOLEAN:
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case S_TRISTATE:
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sym->def[def].tri = no;
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sym->flags |= def_flags;
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break;
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default:
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;
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}
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} else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
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p = strchr(line + strlen(CONFIG_), '=');
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if (!p)
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continue;
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*p++ = 0;
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p2 = strchr(p, '\n');
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if (p2) {
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*p2-- = 0;
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if (*p2 == '\r')
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*p2 = 0;
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}
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sym = sym_find(line + strlen(CONFIG_));
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if (!sym) {
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if (def == S_DEF_AUTO)
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/*
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* Reading from include/config/auto.conf
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* If CONFIG_FOO previously existed in
|
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* auto.conf but it is missing now,
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* include/config/FOO must be touched.
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*/
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conf_touch_dep(line + strlen(CONFIG_));
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else
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conf_set_changed(true);
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continue;
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}
|
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|
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if (sym->flags & def_flags) {
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conf_warning("override: reassigning to symbol %s", sym->name);
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}
|
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if (conf_set_sym_val(sym, def, def_flags, p))
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continue;
|
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} else {
|
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if (line[0] != '\r' && line[0] != '\n')
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conf_warning("unexpected data: %.*s",
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(int)strcspn(line, "\r\n"), line);
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|
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continue;
|
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}
|
|
|
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if (sym && sym_is_choice_value(sym)) {
|
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struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
|
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switch (sym->def[def].tri) {
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case no:
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break;
|
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case mod:
|
|
if (cs->def[def].tri == yes) {
|
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conf_warning("%s creates inconsistent choice state", sym->name);
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cs->flags &= ~def_flags;
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}
|
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break;
|
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case yes:
|
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if (cs->def[def].tri != no)
|
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conf_warning("override: %s changes choice state", sym->name);
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cs->def[def].val = sym;
|
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break;
|
|
}
|
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cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
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}
|
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}
|
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free(line);
|
|
fclose(in);
|
|
return 0;
|
|
}
|
|
|
|
int conf_read(const char *name)
|
|
{
|
|
struct symbol *sym;
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|
int conf_unsaved = 0;
|
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int i;
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|
|
|
conf_set_changed(false);
|
|
|
|
if (conf_read_simple(name, S_DEF_USER)) {
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|
sym_calc_value(modules_sym);
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return 1;
|
|
}
|
|
|
|
sym_calc_value(modules_sym);
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|
|
|
for_all_symbols(i, sym) {
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sym_calc_value(sym);
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if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE))
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continue;
|
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if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
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|
/* check that calculated value agrees with saved value */
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|
switch (sym->type) {
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case S_BOOLEAN:
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case S_TRISTATE:
|
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if (sym->def[S_DEF_USER].tri == sym_get_tristate_value(sym))
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continue;
|
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break;
|
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default:
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if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
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continue;
|
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break;
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|
}
|
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} else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
|
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/* no previous value and not saved */
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continue;
|
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conf_unsaved++;
|
|
/* maybe print value in verbose mode... */
|
|
}
|
|
|
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for_all_symbols(i, sym) {
|
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if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
|
|
/* Reset values of generates values, so they'll appear
|
|
* as new, if they should become visible, but that
|
|
* doesn't quite work if the Kconfig and the saved
|
|
* configuration disagree.
|
|
*/
|
|
if (sym->visible == no && !conf_unsaved)
|
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sym->flags &= ~SYMBOL_DEF_USER;
|
|
switch (sym->type) {
|
|
case S_STRING:
|
|
case S_INT:
|
|
case S_HEX:
|
|
/* Reset a string value if it's out of range */
|
|
if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
|
|
break;
|
|
sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
|
|
conf_unsaved++;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (conf_warnings || conf_unsaved)
|
|
conf_set_changed(true);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct comment_style {
|
|
const char *decoration;
|
|
const char *prefix;
|
|
const char *postfix;
|
|
};
|
|
|
|
static const struct comment_style comment_style_pound = {
|
|
.decoration = "#",
|
|
.prefix = "#",
|
|
.postfix = "#",
|
|
};
|
|
|
|
static const struct comment_style comment_style_c = {
|
|
.decoration = " *",
|
|
.prefix = "/*",
|
|
.postfix = " */",
|
|
};
|
|
|
|
static void conf_write_heading(FILE *fp, const struct comment_style *cs)
|
|
{
|
|
if (!cs)
|
|
return;
|
|
|
|
fprintf(fp, "%s\n", cs->prefix);
|
|
|
|
fprintf(fp, "%s Automatically generated file; DO NOT EDIT.\n",
|
|
cs->decoration);
|
|
|
|
fprintf(fp, "%s %s\n", cs->decoration, rootmenu.prompt->text);
|
|
|
|
fprintf(fp, "%s\n", cs->postfix);
|
|
}
|
|
|
|
/* The returned pointer must be freed on the caller side */
|
|
static char *escape_string_value(const char *in)
|
|
{
|
|
const char *p;
|
|
char *out;
|
|
size_t len;
|
|
|
|
len = strlen(in) + strlen("\"\"") + 1;
|
|
|
|
p = in;
|
|
while (1) {
|
|
p += strcspn(p, "\"\\");
|
|
|
|
if (p[0] == '\0')
|
|
break;
|
|
|
|
len++;
|
|
p++;
|
|
}
|
|
|
|
out = xmalloc(len);
|
|
out[0] = '\0';
|
|
|
|
strcat(out, "\"");
|
|
|
|
p = in;
|
|
while (1) {
|
|
len = strcspn(p, "\"\\");
|
|
strncat(out, p, len);
|
|
p += len;
|
|
|
|
if (p[0] == '\0')
|
|
break;
|
|
|
|
strcat(out, "\\");
|
|
strncat(out, p++, 1);
|
|
}
|
|
|
|
strcat(out, "\"");
|
|
|
|
return out;
|
|
}
|
|
|
|
enum output_n { OUTPUT_N, OUTPUT_N_AS_UNSET, OUTPUT_N_NONE };
|
|
|
|
static void __print_symbol(FILE *fp, struct symbol *sym, enum output_n output_n,
|
|
bool escape_string)
|
|
{
|
|
const char *val;
|
|
char *escaped = NULL;
|
|
|
|
if (sym->type == S_UNKNOWN)
|
|
return;
|
|
|
|
val = sym_get_string_value(sym);
|
|
|
|
if ((sym->type == S_BOOLEAN || sym->type == S_TRISTATE) &&
|
|
output_n != OUTPUT_N && *val == 'n') {
|
|
if (output_n == OUTPUT_N_AS_UNSET)
|
|
fprintf(fp, "# %s%s is not set\n", CONFIG_, sym->name);
|
|
return;
|
|
}
|
|
|
|
if (sym->type == S_STRING && escape_string) {
|
|
escaped = escape_string_value(val);
|
|
val = escaped;
|
|
}
|
|
|
|
fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, val);
|
|
|
|
free(escaped);
|
|
}
|
|
|
|
static void print_symbol_for_dotconfig(FILE *fp, struct symbol *sym)
|
|
{
|
|
__print_symbol(fp, sym, OUTPUT_N_AS_UNSET, true);
|
|
}
|
|
|
|
static void print_symbol_for_autoconf(FILE *fp, struct symbol *sym)
|
|
{
|
|
__print_symbol(fp, sym, OUTPUT_N_NONE, false);
|
|
}
|
|
|
|
void print_symbol_for_listconfig(struct symbol *sym)
|
|
{
|
|
__print_symbol(stdout, sym, OUTPUT_N, true);
|
|
}
|
|
|
|
static void print_symbol_for_c(FILE *fp, struct symbol *sym)
|
|
{
|
|
const char *val;
|
|
const char *sym_suffix = "";
|
|
const char *val_prefix = "";
|
|
char *escaped = NULL;
|
|
|
|
if (sym->type == S_UNKNOWN)
|
|
return;
|
|
|
|
val = sym_get_string_value(sym);
|
|
|
|
switch (sym->type) {
|
|
case S_BOOLEAN:
|
|
case S_TRISTATE:
|
|
switch (*val) {
|
|
case 'n':
|
|
return;
|
|
case 'm':
|
|
sym_suffix = "_MODULE";
|
|
/* fall through */
|
|
default:
|
|
val = "1";
|
|
}
|
|
break;
|
|
case S_HEX:
|
|
if (val[0] != '0' || (val[1] != 'x' && val[1] != 'X'))
|
|
val_prefix = "0x";
|
|
break;
|
|
case S_STRING:
|
|
escaped = escape_string_value(val);
|
|
val = escaped;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
fprintf(fp, "#define %s%s%s %s%s\n", CONFIG_, sym->name, sym_suffix,
|
|
val_prefix, val);
|
|
|
|
free(escaped);
|
|
}
|
|
|
|
static void print_symbol_for_rustccfg(FILE *fp, struct symbol *sym)
|
|
{
|
|
const char *val;
|
|
const char *val_prefix = "";
|
|
char *val_prefixed = NULL;
|
|
size_t val_prefixed_len;
|
|
char *escaped = NULL;
|
|
|
|
if (sym->type == S_UNKNOWN)
|
|
return;
|
|
|
|
val = sym_get_string_value(sym);
|
|
|
|
switch (sym->type) {
|
|
case S_BOOLEAN:
|
|
case S_TRISTATE:
|
|
/*
|
|
* We do not care about disabled ones, i.e. no need for
|
|
* what otherwise are "comments" in other printers.
|
|
*/
|
|
if (*val == 'n')
|
|
return;
|
|
|
|
/*
|
|
* To have similar functionality to the C macro `IS_ENABLED()`
|
|
* we provide an empty `--cfg CONFIG_X` here in both `y`
|
|
* and `m` cases.
|
|
*
|
|
* Then, the common `fprintf()` below will also give us
|
|
* a `--cfg CONFIG_X="y"` or `--cfg CONFIG_X="m"`, which can
|
|
* be used as the equivalent of `IS_BUILTIN()`/`IS_MODULE()`.
|
|
*/
|
|
fprintf(fp, "--cfg=%s%s\n", CONFIG_, sym->name);
|
|
break;
|
|
case S_HEX:
|
|
if (val[0] != '0' || (val[1] != 'x' && val[1] != 'X'))
|
|
val_prefix = "0x";
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (strlen(val_prefix) > 0) {
|
|
val_prefixed_len = strlen(val) + strlen(val_prefix) + 1;
|
|
val_prefixed = xmalloc(val_prefixed_len);
|
|
snprintf(val_prefixed, val_prefixed_len, "%s%s", val_prefix, val);
|
|
val = val_prefixed;
|
|
}
|
|
|
|
/* All values get escaped: the `--cfg` option only takes strings */
|
|
escaped = escape_string_value(val);
|
|
val = escaped;
|
|
|
|
fprintf(fp, "--cfg=%s%s=%s\n", CONFIG_, sym->name, val);
|
|
|
|
free(escaped);
|
|
free(val_prefixed);
|
|
}
|
|
|
|
/*
|
|
* Write out a minimal config.
|
|
* All values that has default values are skipped as this is redundant.
|
|
*/
|
|
int conf_write_defconfig(const char *filename)
|
|
{
|
|
struct symbol *sym;
|
|
struct menu *menu;
|
|
FILE *out;
|
|
|
|
out = fopen(filename, "w");
|
|
if (!out)
|
|
return 1;
|
|
|
|
sym_clear_all_valid();
|
|
|
|
/* Traverse all menus to find all relevant symbols */
|
|
menu = rootmenu.list;
|
|
|
|
while (menu != NULL)
|
|
{
|
|
sym = menu->sym;
|
|
if (sym == NULL) {
|
|
if (!menu_is_visible(menu))
|
|
goto next_menu;
|
|
} else if (!sym_is_choice(sym)) {
|
|
sym_calc_value(sym);
|
|
if (!(sym->flags & SYMBOL_WRITE))
|
|
goto next_menu;
|
|
sym->flags &= ~SYMBOL_WRITE;
|
|
/* If we cannot change the symbol - skip */
|
|
if (!sym_is_changeable(sym))
|
|
goto next_menu;
|
|
/* If symbol equals to default value - skip */
|
|
if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
|
|
goto next_menu;
|
|
|
|
/*
|
|
* If symbol is a choice value and equals to the
|
|
* default for a choice - skip.
|
|
* But only if value is bool and equal to "y" and
|
|
* choice is not "optional".
|
|
* (If choice is "optional" then all values can be "n")
|
|
*/
|
|
if (sym_is_choice_value(sym)) {
|
|
struct symbol *cs;
|
|
struct symbol *ds;
|
|
|
|
cs = prop_get_symbol(sym_get_choice_prop(sym));
|
|
ds = sym_choice_default(cs);
|
|
if (!sym_is_optional(cs) && sym == ds) {
|
|
if ((sym->type == S_BOOLEAN) &&
|
|
sym_get_tristate_value(sym) == yes)
|
|
goto next_menu;
|
|
}
|
|
}
|
|
print_symbol_for_dotconfig(out, sym);
|
|
}
|
|
next_menu:
|
|
if (menu->list != NULL) {
|
|
menu = menu->list;
|
|
}
|
|
else if (menu->next != NULL) {
|
|
menu = menu->next;
|
|
} else {
|
|
while ((menu = menu->parent)) {
|
|
if (menu->next != NULL) {
|
|
menu = menu->next;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
fclose(out);
|
|
return 0;
|
|
}
|
|
|
|
int conf_write(const char *name)
|
|
{
|
|
FILE *out;
|
|
struct symbol *sym;
|
|
struct menu *menu;
|
|
const char *str;
|
|
char tmpname[PATH_MAX + 1], oldname[PATH_MAX + 1];
|
|
char *env;
|
|
int i;
|
|
bool need_newline = false;
|
|
|
|
if (!name)
|
|
name = conf_get_configname();
|
|
|
|
if (!*name) {
|
|
fprintf(stderr, "config name is empty\n");
|
|
return -1;
|
|
}
|
|
|
|
if (is_dir(name)) {
|
|
fprintf(stderr, "%s: Is a directory\n", name);
|
|
return -1;
|
|
}
|
|
|
|
if (make_parent_dir(name))
|
|
return -1;
|
|
|
|
env = getenv("KCONFIG_OVERWRITECONFIG");
|
|
if (env && *env) {
|
|
*tmpname = 0;
|
|
out = fopen(name, "w");
|
|
} else {
|
|
snprintf(tmpname, sizeof(tmpname), "%s.%d.tmp",
|
|
name, (int)getpid());
|
|
out = fopen(tmpname, "w");
|
|
}
|
|
if (!out)
|
|
return 1;
|
|
|
|
conf_write_heading(out, &comment_style_pound);
|
|
|
|
if (!conf_get_changed())
|
|
sym_clear_all_valid();
|
|
|
|
menu = rootmenu.list;
|
|
while (menu) {
|
|
sym = menu->sym;
|
|
if (!sym) {
|
|
if (!menu_is_visible(menu))
|
|
goto next;
|
|
str = menu_get_prompt(menu);
|
|
fprintf(out, "\n"
|
|
"#\n"
|
|
"# %s\n"
|
|
"#\n", str);
|
|
need_newline = false;
|
|
} else if (!(sym->flags & SYMBOL_CHOICE) &&
|
|
!(sym->flags & SYMBOL_WRITTEN)) {
|
|
sym_calc_value(sym);
|
|
if (!(sym->flags & SYMBOL_WRITE))
|
|
goto next;
|
|
if (need_newline) {
|
|
fprintf(out, "\n");
|
|
need_newline = false;
|
|
}
|
|
sym->flags |= SYMBOL_WRITTEN;
|
|
print_symbol_for_dotconfig(out, sym);
|
|
}
|
|
|
|
next:
|
|
if (menu->list) {
|
|
menu = menu->list;
|
|
continue;
|
|
}
|
|
|
|
end_check:
|
|
if (!menu->sym && menu_is_visible(menu) && menu != &rootmenu &&
|
|
menu->prompt->type == P_MENU) {
|
|
fprintf(out, "# end of %s\n", menu_get_prompt(menu));
|
|
need_newline = true;
|
|
}
|
|
|
|
if (menu->next) {
|
|
menu = menu->next;
|
|
} else {
|
|
menu = menu->parent;
|
|
if (menu)
|
|
goto end_check;
|
|
}
|
|
}
|
|
fclose(out);
|
|
|
|
for_all_symbols(i, sym)
|
|
sym->flags &= ~SYMBOL_WRITTEN;
|
|
|
|
if (*tmpname) {
|
|
if (is_same(name, tmpname)) {
|
|
conf_message("No change to %s", name);
|
|
unlink(tmpname);
|
|
conf_set_changed(false);
|
|
return 0;
|
|
}
|
|
|
|
snprintf(oldname, sizeof(oldname), "%s.old", name);
|
|
rename(name, oldname);
|
|
if (rename(tmpname, name))
|
|
return 1;
|
|
}
|
|
|
|
conf_message("configuration written to %s", name);
|
|
|
|
conf_set_changed(false);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* write a dependency file as used by kbuild to track dependencies */
|
|
static int conf_write_autoconf_cmd(const char *autoconf_name)
|
|
{
|
|
char name[PATH_MAX], tmp[PATH_MAX];
|
|
struct file *file;
|
|
FILE *out;
|
|
int ret;
|
|
|
|
ret = snprintf(name, sizeof(name), "%s.cmd", autoconf_name);
|
|
if (ret >= sizeof(name)) /* check truncation */
|
|
return -1;
|
|
|
|
if (make_parent_dir(name))
|
|
return -1;
|
|
|
|
ret = snprintf(tmp, sizeof(tmp), "%s.cmd.tmp", autoconf_name);
|
|
if (ret >= sizeof(tmp)) /* check truncation */
|
|
return -1;
|
|
|
|
out = fopen(tmp, "w");
|
|
if (!out) {
|
|
perror("fopen");
|
|
return -1;
|
|
}
|
|
|
|
fprintf(out, "deps_config := \\\n");
|
|
for (file = file_list; file; file = file->next)
|
|
fprintf(out, "\t%s \\\n", file->name);
|
|
|
|
fprintf(out, "\n%s: $(deps_config)\n\n", autoconf_name);
|
|
|
|
env_write_dep(out, autoconf_name);
|
|
|
|
fprintf(out, "\n$(deps_config): ;\n");
|
|
|
|
fflush(out);
|
|
ret = ferror(out); /* error check for all fprintf() calls */
|
|
fclose(out);
|
|
if (ret)
|
|
return -1;
|
|
|
|
if (rename(tmp, name)) {
|
|
perror("rename");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int conf_touch_deps(void)
|
|
{
|
|
const char *name, *tmp;
|
|
struct symbol *sym;
|
|
int res, i;
|
|
|
|
name = conf_get_autoconfig_name();
|
|
tmp = strrchr(name, '/');
|
|
depfile_prefix_len = tmp ? tmp - name + 1 : 0;
|
|
if (depfile_prefix_len + 1 > sizeof(depfile_path))
|
|
return -1;
|
|
|
|
strncpy(depfile_path, name, depfile_prefix_len);
|
|
depfile_path[depfile_prefix_len] = 0;
|
|
|
|
conf_read_simple(name, S_DEF_AUTO);
|
|
sym_calc_value(modules_sym);
|
|
|
|
for_all_symbols(i, sym) {
|
|
sym_calc_value(sym);
|
|
if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name)
|
|
continue;
|
|
if (sym->flags & SYMBOL_WRITE) {
|
|
if (sym->flags & SYMBOL_DEF_AUTO) {
|
|
/*
|
|
* symbol has old and new value,
|
|
* so compare them...
|
|
*/
|
|
switch (sym->type) {
|
|
case S_BOOLEAN:
|
|
case S_TRISTATE:
|
|
if (sym_get_tristate_value(sym) ==
|
|
sym->def[S_DEF_AUTO].tri)
|
|
continue;
|
|
break;
|
|
case S_STRING:
|
|
case S_HEX:
|
|
case S_INT:
|
|
if (!strcmp(sym_get_string_value(sym),
|
|
sym->def[S_DEF_AUTO].val))
|
|
continue;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
} else {
|
|
/*
|
|
* If there is no old value, only 'no' (unset)
|
|
* is allowed as new value.
|
|
*/
|
|
switch (sym->type) {
|
|
case S_BOOLEAN:
|
|
case S_TRISTATE:
|
|
if (sym_get_tristate_value(sym) == no)
|
|
continue;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
} else if (!(sym->flags & SYMBOL_DEF_AUTO))
|
|
/* There is neither an old nor a new value. */
|
|
continue;
|
|
/* else
|
|
* There is an old value, but no new value ('no' (unset)
|
|
* isn't saved in auto.conf, so the old value is always
|
|
* different from 'no').
|
|
*/
|
|
|
|
res = conf_touch_dep(sym->name);
|
|
if (res)
|
|
return res;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __conf_write_autoconf(const char *filename,
|
|
void (*print_symbol)(FILE *, struct symbol *),
|
|
const struct comment_style *comment_style)
|
|
{
|
|
char tmp[PATH_MAX];
|
|
FILE *file;
|
|
struct symbol *sym;
|
|
int ret, i;
|
|
|
|
if (make_parent_dir(filename))
|
|
return -1;
|
|
|
|
ret = snprintf(tmp, sizeof(tmp), "%s.tmp", filename);
|
|
if (ret >= sizeof(tmp)) /* check truncation */
|
|
return -1;
|
|
|
|
file = fopen(tmp, "w");
|
|
if (!file) {
|
|
perror("fopen");
|
|
return -1;
|
|
}
|
|
|
|
conf_write_heading(file, comment_style);
|
|
|
|
for_all_symbols(i, sym)
|
|
if ((sym->flags & SYMBOL_WRITE) && sym->name)
|
|
print_symbol(file, sym);
|
|
|
|
fflush(file);
|
|
/* check possible errors in conf_write_heading() and print_symbol() */
|
|
ret = ferror(file);
|
|
fclose(file);
|
|
if (ret)
|
|
return -1;
|
|
|
|
if (rename(tmp, filename)) {
|
|
perror("rename");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int conf_write_autoconf(int overwrite)
|
|
{
|
|
struct symbol *sym;
|
|
const char *autoconf_name = conf_get_autoconfig_name();
|
|
int ret, i;
|
|
|
|
if (!overwrite && is_present(autoconf_name))
|
|
return 0;
|
|
|
|
ret = conf_write_autoconf_cmd(autoconf_name);
|
|
if (ret)
|
|
return -1;
|
|
|
|
if (conf_touch_deps())
|
|
return 1;
|
|
|
|
for_all_symbols(i, sym)
|
|
sym_calc_value(sym);
|
|
|
|
ret = __conf_write_autoconf(conf_get_autoheader_name(),
|
|
print_symbol_for_c,
|
|
&comment_style_c);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = __conf_write_autoconf(conf_get_rustccfg_name(),
|
|
print_symbol_for_rustccfg,
|
|
NULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* Create include/config/auto.conf. This must be the last step because
|
|
* Kbuild has a dependency on auto.conf and this marks the successful
|
|
* completion of the previous steps.
|
|
*/
|
|
ret = __conf_write_autoconf(conf_get_autoconfig_name(),
|
|
print_symbol_for_autoconf,
|
|
&comment_style_pound);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool conf_changed;
|
|
static void (*conf_changed_callback)(void);
|
|
|
|
void conf_set_changed(bool val)
|
|
{
|
|
bool changed = conf_changed != val;
|
|
|
|
conf_changed = val;
|
|
|
|
if (conf_changed_callback && changed)
|
|
conf_changed_callback();
|
|
}
|
|
|
|
bool conf_get_changed(void)
|
|
{
|
|
return conf_changed;
|
|
}
|
|
|
|
void conf_set_changed_callback(void (*fn)(void))
|
|
{
|
|
conf_changed_callback = fn;
|
|
}
|
|
|
|
void set_all_choice_values(struct symbol *csym)
|
|
{
|
|
struct property *prop;
|
|
struct symbol *sym;
|
|
struct expr *e;
|
|
|
|
prop = sym_get_choice_prop(csym);
|
|
|
|
/*
|
|
* Set all non-assinged choice values to no
|
|
*/
|
|
expr_list_for_each_sym(prop->expr, e, sym) {
|
|
if (!sym_has_value(sym))
|
|
sym->def[S_DEF_USER].tri = no;
|
|
}
|
|
csym->flags |= SYMBOL_DEF_USER;
|
|
/* clear VALID to get value calculated */
|
|
csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
|
|
}
|