| 1 | |
| 2 | * Copyright (C) 2002 Roman Zippel <[email protected]>
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| 3 | * Released under the terms of the GNU GPL v2.0.
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| 4 |
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| 5 |
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| 6 | #include <sys/stat.h>
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| 7 | #include <ctype.h>
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| 8 | #include <stdio.h>
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| 9 | #include <stdlib.h>
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| 10 | #include <string.h>
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| 11 | #include <time.h>
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| 12 | #include <unistd.h>
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| 13 |
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| 14 | #define LKC_DIRECT_LINK
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| 15 | #include "lkc.h"
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| 16 |
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| 17 | const char conf_def_filename[] = ".config";
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| 18 |
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| 19 | const char conf_defname[] = "arch/$ARCH/defconfig";
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| 20 |
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| 21 | const char *conf_confnames[] = {
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| 22 | ".config",
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| 23 | "/lib/modules/$UNAME_RELEASE/.config",
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| 24 | "/etc/kernel-config",
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| 25 | "/boot/config-$UNAME_RELEASE",
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| 26 | conf_defname,
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| 27 | NULL,
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| 28 | };
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| 29 |
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| 30 | static char *conf_expand_value(const char *in)
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| 31 | {
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| 32 | struct symbol *sym;
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| 33 | const char *src;
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| 34 | static char res_value[SYMBOL_MAXLENGTH];
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| 35 | char *dst, name[SYMBOL_MAXLENGTH];
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| 36 |
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| 37 | res_value[0] = 0;
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| 38 | dst = name;
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| 39 | while ((src = strchr(in, '$'))) {
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| 40 | strncat(res_value, in, src - in);
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| 41 | src++;
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| 42 | dst = name;
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| 43 | while (isalnum(*src) || *src == '_')
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| 44 | *dst++ = *src++;
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| 45 | *dst = 0;
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| 46 | sym = sym_lookup(name, 0);
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| 47 | sym_calc_value(sym);
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| 48 | strcat(res_value, sym_get_string_value(sym));
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| 49 | in = src;
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| 50 | }
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| 51 | strcat(res_value, in);
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| 52 |
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| 53 | return res_value;
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| 54 | }
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| 55 |
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| 56 | char *conf_get_default_confname(void)
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| 57 | {
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| 58 | struct stat buf;
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| 59 | static char fullname[PATH_MAX+1];
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| 60 | char *env, *name;
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| 61 |
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| 62 | name = conf_expand_value(conf_defname);
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| 63 | env = getenv(SRCTREE);
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| 64 | if (env) {
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| 65 | sprintf(fullname, "%s/%s", env, name);
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| 66 | if (!stat(fullname, &buf))
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| 67 | return fullname;
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| 68 | }
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| 69 | return name;
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| 70 | }
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| 71 |
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| 72 | int conf_read(const char *name)
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| 73 | {
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| 74 | FILE *in = NULL;
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| 75 | char line[1024];
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| 76 | char *p, *p2;
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| 77 | int lineno = 0;
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| 78 | struct symbol *sym;
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| 79 | struct property *prop;
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| 80 | struct expr *e;
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| 81 | int i;
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| 82 |
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| 83 | if (name) {
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| 84 | in = zconf_fopen(name);
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| 85 | } else {
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| 86 | const char **names = conf_confnames;
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| 87 | while ((name = *names++)) {
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| 88 | name = conf_expand_value(name);
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| 89 | in = zconf_fopen(name);
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| 90 | if (in) {
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| 91 | printf(_("#\n"
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| 92 | "# using defaults found in %s\n"
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| 93 | "#\n"), name);
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| 94 | break;
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| 95 | }
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| 96 | }
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| 97 | }
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| 98 |
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| 99 | if (!in)
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| 100 | return 1;
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| 101 |
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| 102 | for_all_symbols(i, sym) {
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| 103 | sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
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| 104 | sym->flags &= ~SYMBOL_VALID;
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| 105 | switch (sym->type) {
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| 106 | case S_INT:
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| 107 | case S_HEX:
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| 108 | case S_STRING:
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| 109 | if (sym->user.val)
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| 110 | free(sym->user.val);
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| 111 | default:
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| 112 | sym->user.val = NULL;
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| 113 | sym->user.tri = no;
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| 114 | }
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| 115 | }
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| 116 |
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| 117 | while (fgets(line, sizeof(line), in)) {
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| 118 | lineno++;
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| 119 | sym = NULL;
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| 120 | switch (line[0]) {
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| 121 | case '#':
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| 122 | if (memcmp(line + 2, "CONFIG_", 7))
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| 123 | continue;
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| 124 | p = strchr(line + 9, ' ');
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| 125 | if (!p)
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| 126 | continue;
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| 127 | *p++ = 0;
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| 128 | if (strncmp(p, "is not set", 10))
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| 129 | continue;
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| 130 | sym = sym_find(line + 9);
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| 131 | if (!sym) {
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| 132 | fprintf(stderr, "%s:%d: trying to assign nonexistent symbol %s\n", name, lineno, line + 9);
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| 133 | break;
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| 134 | }
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| 135 | switch (sym->type) {
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| 136 | case S_BOOLEAN:
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| 137 | case S_TRISTATE:
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| 138 | sym->user.tri = no;
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| 139 | sym->flags &= ~SYMBOL_NEW;
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| 140 | break;
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| 141 | default:
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| 142 | ;
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| 143 | }
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| 144 | break;
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| 145 | case 'C':
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| 146 | if (memcmp(line, "CONFIG_", 7))
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| 147 | continue;
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| 148 | p = strchr(line + 7, '=');
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| 149 | if (!p)
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| 150 | continue;
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| 151 | *p++ = 0;
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| 152 | p2 = strchr(p, '\n');
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| 153 | if (p2)
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| 154 | *p2 = 0;
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| 155 | sym = sym_find(line + 7);
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| 156 | if (!sym) {
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| 157 | fprintf(stderr, "%s:%d: trying to assign nonexistent symbol %s\n", name, lineno, line + 7);
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| 158 | break;
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| 159 | }
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| 160 | switch (sym->type) {
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| 161 | case S_TRISTATE:
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| 162 | if (p[0] == 'm') {
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| 163 | sym->user.tri = mod;
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| 164 | sym->flags &= ~SYMBOL_NEW;
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| 165 | break;
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| 166 | }
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| 167 | case S_BOOLEAN:
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| 168 | if (p[0] == 'y') {
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| 169 | sym->user.tri = yes;
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| 170 | sym->flags &= ~SYMBOL_NEW;
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| 171 | break;
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| 172 | }
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| 173 | if (p[0] == 'n') {
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| 174 | sym->user.tri = no;
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| 175 | sym->flags &= ~SYMBOL_NEW;
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| 176 | break;
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| 177 | }
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| 178 | break;
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| 179 | case S_STRING:
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| 180 | if (*p++ != '"')
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| 181 | break;
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| 182 | for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
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| 183 | if (*p2 == '"') {
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| 184 | *p2 = 0;
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| 185 | break;
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| 186 | }
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| 187 | memmove(p2, p2 + 1, strlen(p2));
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| 188 | }
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| 189 | if (!p2) {
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| 190 | fprintf(stderr, "%s:%d: invalid string found\n", name, lineno);
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| 191 | exit(1);
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| 192 | }
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| 193 | case S_INT:
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| 194 | case S_HEX:
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| 195 | if (sym_string_valid(sym, p)) {
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| 196 | sym->user.val = strdup(p);
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| 197 | sym->flags &= ~SYMBOL_NEW;
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| 198 | } else {
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| 199 | fprintf(stderr, "%s:%d: symbol value '%s' invalid for %s\n", name, lineno, p, sym->name);
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| 200 | exit(1);
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| 201 | }
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| 202 | break;
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| 203 | default:
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| 204 | ;
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| 205 | }
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| 206 | break;
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| 207 | case '\n':
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| 208 | break;
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| 209 | default:
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| 210 | continue;
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| 211 | }
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| 212 | if (sym && sym_is_choice_value(sym)) {
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| 213 | struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
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| 214 | switch (sym->user.tri) {
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| 215 | case no:
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| 216 | break;
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| 217 | case mod:
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| 218 | if (cs->user.tri == yes)
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| 219 | ;
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| 220 | break;
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| 221 | case yes:
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| 222 | if (cs->user.tri != no)
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| 223 | ;
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| 224 | cs->user.val = sym;
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| 225 | break;
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| 226 | }
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| 227 | cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
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| 228 | cs->flags &= ~SYMBOL_NEW;
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| 229 | }
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| 230 | }
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| 231 | fclose(in);
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| 232 |
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| 233 | if (modules_sym)
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| 234 | sym_calc_value(modules_sym);
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| 235 | for_all_symbols(i, sym) {
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| 236 | sym_calc_value(sym);
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| 237 | if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
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| 238 | if (sym->visible == no)
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| 239 | sym->flags |= SYMBOL_NEW;
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| 240 | switch (sym->type) {
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| 241 | case S_STRING:
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| 242 | case S_INT:
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| 243 | case S_HEX:
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| 244 | if (!sym_string_within_range(sym, sym->user.val))
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| 245 | sym->flags |= SYMBOL_NEW;
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| 246 | default:
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| 247 | break;
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| 248 | }
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| 249 | }
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| 250 | if (!sym_is_choice(sym))
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| 251 | continue;
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| 252 | prop = sym_get_choice_prop(sym);
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| 253 | for (e = prop->expr; e; e = e->left.expr)
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| 254 | if (e->right.sym->visible != no)
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| 255 | sym->flags |= e->right.sym->flags & SYMBOL_NEW;
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| 256 | }
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| 257 |
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| 258 | sym_change_count = 1;
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| 259 |
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| 260 | return 0;
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| 261 | }
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| 262 |
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| 263 | int conf_write(const char *name)
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| 264 | {
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| 265 | FILE *out, *out_h;
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| 266 | struct symbol *sym;
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| 267 | struct menu *menu;
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| 268 | const char *basename;
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| 269 | char dirname[128], tmpname[128], newname[128];
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| 270 | int type, l;
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| 271 | const char *str;
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| 272 | time_t now;
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| 273 | int use_timestamp = 1;
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| 274 | char *env;
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| 275 |
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| 276 | dirname[0] = 0;
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| 277 | if (name && name[0]) {
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| 278 | struct stat st;
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| 279 | char *slash;
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| 280 |
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| 281 | if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
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| 282 | strcpy(dirname, name);
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| 283 | strcat(dirname, "/");
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| 284 | basename = conf_def_filename;
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| 285 | } else if ((slash = strrchr(name, '/'))) {
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| 286 | int size = slash - name + 1;
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| 287 | memcpy(dirname, name, size);
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| 288 | dirname[size] = 0;
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| 289 | if (slash[1])
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| 290 | basename = slash + 1;
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| 291 | else
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| 292 | basename = conf_def_filename;
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| 293 | } else
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| 294 | basename = name;
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| 295 | } else
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| 296 | basename = conf_def_filename;
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| 297 |
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| 298 | sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
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| 299 | out = fopen(newname, "w");
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| 300 | if (!out)
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| 301 | return 1;
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| 302 | out_h = NULL;
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| 303 | if (!name) {
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| 304 | out_h = fopen(".tmpconfig.h", "w");
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| 305 | if (!out_h)
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| 306 | return 1;
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| 307 | }
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| 308 | sym = sym_lookup("KERNELRELEASE", 0);
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| 309 | sym_calc_value(sym);
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| 310 | time(&now);
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| 311 | env = getenv("KCONFIG_NOTIMESTAMP");
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| 312 | if (env && *env)
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| 313 | use_timestamp = 0;
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| 314 |
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| 315 | fprintf(out, _("#\n"
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| 316 | "# Automatically generated make config: don't edit\n"
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| 317 | "# Linux kernel version: %s\n"
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| 318 | "%s%s"
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| 319 | "#\n"),
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| 320 | sym_get_string_value(sym),
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| 321 | use_timestamp ? "# " : "",
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| 322 | use_timestamp ? ctime(&now) : "");
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| 323 | if (out_h)
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| 324 | fprintf(out_h, "/*\n"
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| 325 | " * Automatically generated C config: don't edit\n"
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| 326 | " * Linux kernel version: %s\n"
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| 327 | "%s%s"
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| 328 | " */\n"
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| 329 | "#define AUTOCONF_INCLUDED\n",
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| 330 | sym_get_string_value(sym),
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| 331 | use_timestamp ? " * " : "",
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| 332 | use_timestamp ? ctime(&now) : "");
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| 333 |
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| 334 | if (!sym_change_count)
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| 335 | sym_clear_all_valid();
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| 336 |
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| 337 | menu = rootmenu.list;
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| 338 | while (menu) {
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| 339 | sym = menu->sym;
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| 340 | if (!sym) {
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| 341 | if (!menu_is_visible(menu))
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| 342 | goto next;
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| 343 | str = menu_get_prompt(menu);
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| 344 | fprintf(out, "\n"
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| 345 | "#\n"
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| 346 | "# %s\n"
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| 347 | "#\n", str);
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| 348 | if (out_h)
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| 349 | fprintf(out_h, "\n"
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| 350 | "/*\n"
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| 351 | " * %s\n"
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| 352 | " */\n", str);
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| 353 | } else if (!(sym->flags & SYMBOL_CHOICE)) {
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| 354 | sym_calc_value(sym);
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| 355 | if (!(sym->flags & SYMBOL_WRITE))
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| 356 | goto next;
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| 357 | sym->flags &= ~SYMBOL_WRITE;
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| 358 | type = sym->type;
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| 359 | if (type == S_TRISTATE) {
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| 360 | sym_calc_value(modules_sym);
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| 361 | if (modules_sym->curr.tri == no)
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| 362 | type = S_BOOLEAN;
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| 363 | }
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| 364 | switch (type) {
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| 365 | case S_BOOLEAN:
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| 366 | case S_TRISTATE:
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| 367 | switch (sym_get_tristate_value(sym)) {
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| 368 | case no:
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| 369 | fprintf(out, "# CONFIG_%s is not set\n", sym->name);
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| 370 | if (out_h)
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| 371 | fprintf(out_h, "#undef CONFIG_%s\n", sym->name);
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| 372 | break;
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| 373 | case mod:
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| 374 | fprintf(out, "CONFIG_%s=m\n", sym->name);
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| 375 | if (out_h)
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| 376 | fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
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| 377 | break;
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| 378 | case yes:
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| 379 | fprintf(out, "CONFIG_%s=y\n", sym->name);
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| 380 | if (out_h)
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| 381 | fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
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| 382 | break;
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| 383 | }
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| 384 | break;
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| 385 | case S_STRING:
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| 386 | |
| 387 | str = sym_get_string_value(sym);
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| 388 | fprintf(out, "CONFIG_%s=\"", sym->name);
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| 389 | if (out_h)
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| 390 | fprintf(out_h, "#define CONFIG_%s \"", sym->name);
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| 391 | do {
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| 392 | l = strcspn(str, "\"\\");
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| 393 | if (l) {
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| 394 | fwrite(str, l, 1, out);
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| 395 | if (out_h)
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| 396 | fwrite(str, l, 1, out_h);
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| 397 | }
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| 398 | str += l;
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| 399 | while (*str == '\\' || *str == '"') {
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| 400 | fprintf(out, "\\%c", *str);
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| 401 | if (out_h)
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| 402 | fprintf(out_h, "\\%c", *str);
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| 403 | str++;
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| 404 | }
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| 405 | } while (*str);
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| 406 | fputs("\"\n", out);
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| 407 | if (out_h)
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| 408 | fputs("\"\n", out_h);
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| 409 | break;
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| 410 | case S_HEX:
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| 411 | str = sym_get_string_value(sym);
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| 412 | if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
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| 413 | fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
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| 414 | if (out_h)
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| 415 | fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
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| 416 | break;
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| 417 | }
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| 418 | case S_INT:
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| 419 | str = sym_get_string_value(sym);
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| 420 | fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
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| 421 | if (out_h)
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| 422 | fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
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| 423 | break;
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| 424 | }
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| 425 | }
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| 426 |
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| 427 | next:
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| 428 | if (menu->list) {
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| 429 | menu = menu->list;
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| 430 | continue;
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| 431 | }
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| 432 | if (menu->next)
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| 433 | menu = menu->next;
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| 434 | else while ((menu = menu->parent)) {
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| 435 | if (menu->next) {
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| 436 | menu = menu->next;
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| 437 | break;
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| 438 | }
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| 439 | }
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| 440 | }
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| 441 | fclose(out);
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| 442 | if (out_h) {
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| 443 | fclose(out_h);
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| 444 | rename(".tmpconfig.h", "include/linux/autoconf.h");
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| 445 | file_write_dep(NULL);
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| 446 | }
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| 447 | if (!name || basename != conf_def_filename) {
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| 448 | if (!name)
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| 449 | name = conf_def_filename;
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| 450 | sprintf(tmpname, "%s.old", name);
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| 451 | rename(name, tmpname);
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| 452 | }
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| 453 | sprintf(tmpname, "%s%s", dirname, basename);
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| 454 | if (rename(newname, tmpname))
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| 455 | return 1;
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| 456 |
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| 457 | sym_change_count = 0;
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| 458 |
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| 459 | return 0;
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| 460 | }
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