// SPDX-License-Identifier: GPL-2.0/* * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org> */ #include <sys/mman.h>#include <sys/stat.h>#include <sys/types.h>#include <ctype.h>#include <errno.h>#include <fcntl.h>#include <limits.h>#include <stdarg.h>#include <stdbool.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <time.h>#include <unistd.h> #include <xalloc.h>#include "internal.h"#include "lkc.h" struct gstr autoconf_cmd; /* return true if 'path' exists, false otherwise */static bool is_present(const char *path){ struct stat st; return !stat(path, &st);} /* return true if 'path' exists and it is a directory, false otherwise */static bool is_dir(const char *path){ struct stat st; if (stat(path, &st)) return false; return S_ISDIR(st.st_mode);} /* return true if the given two files are the same, false otherwise */static bool is_same(const char *file1, const char *file2){ int fd1, fd2; struct stat st1, st2; void *map1, *map2; bool ret = false; fd1 = open(file1, O_RDONLY); if (fd1 < 0) return ret; fd2 = open(file2, O_RDONLY); if (fd2 < 0) goto close1; ret = fstat(fd1, &st1); if (ret) goto close2; ret = fstat(fd2, &st2); if (ret) goto close2; if (st1.st_size != st2.st_size) goto close2; map1 = mmap(NULL, st1.st_size, PROT_READ, MAP_PRIVATE, fd1, 0); if (map1 == MAP_FAILED) goto close2; map2 = mmap(NULL, st2.st_size, PROT_READ, MAP_PRIVATE, fd2, 0); if (map2 == MAP_FAILED) goto close2; if (bcmp(map1, map2, st1.st_size)) goto close2; ret = true;close2: close(fd2);close1: close(fd1); return ret;} /* * Create the parent directory of the given path. * * For example, if 'include/config/auto.conf' is given, create 'include/config'. */static int make_parent_dir(const char *path){ char tmp[PATH_MAX + 1]; char *p; strncpy(tmp, path, sizeof(tmp)); tmp[sizeof(tmp) - 1] = 0; /* Remove the base name. Just return if nothing is left */ p = strrchr(tmp, '/'); if (!p) return 0; *(p + 1) = 0; /* Just in case it is an absolute path */ p = tmp; while (*p == '/') p++; while ((p = strchr(p, '/'))) { *p = 0; /* skip if the directory exists */ if (!is_dir(tmp) && mkdir(tmp, 0755)) return -1; *p = '/'; while (*p == '/') p++; } return 0;} static char depfile_path[PATH_MAX];static size_t depfile_prefix_len; /* touch depfile for symbol 'name' */static int conf_touch_dep(const char *name){ int fd; /* check overflow: prefix + name + '\0' must fit in buffer. */ if (depfile_prefix_len + strlen(name) + 1 > sizeof(depfile_path)) return -1; strcpy(depfile_path + depfile_prefix_len, name); fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); if (fd == -1) return -1; close(fd); return 0;} static void conf_warning(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); static void conf_message(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); static const char *conf_filename;static int conf_lineno, conf_warnings; bool conf_errors(void){ if (conf_warnings) return getenv("KCONFIG_WERROR"); return false;} static void conf_warning(const char *fmt, ...){ va_list ap; va_start(ap, fmt); fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno); vfprintf(stderr, fmt, ap); fprintf(stderr, "\n"); va_end(ap); conf_warnings++;} static void conf_default_message_callback(const char *s){ printf("#\n# "); printf("%s", s); printf("\n#\n");} static void (*conf_message_callback)(const char *s) = conf_default_message_callback;void conf_set_message_callback(void (*fn)(const char *s)){ conf_message_callback = fn;} static void conf_message(const char *fmt, ...){ va_list ap; char buf[4096]; if (!conf_message_callback) return; va_start(ap, fmt); vsnprintf(buf, sizeof(buf), fmt, ap); conf_message_callback(buf); va_end(ap);} const char *conf_get_configname(void){ char *name = getenv("KCONFIG_CONFIG"); return name ? name : ".config";} static const char *conf_get_autoconfig_name(void){ char *name = getenv("KCONFIG_AUTOCONFIG"); return name ? name : "include/config/auto.conf";} static const char *conf_get_autoheader_name(void){ char *name = getenv("KCONFIG_AUTOHEADER"); return name ? name : "include/generated/autoconf.h";} static const char *conf_get_rustccfg_name(void){ char *name = getenv("KCONFIG_RUSTCCFG"); return name ? name : "include/generated/rustc_cfg";} static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p){ char *p2; switch (sym->type) { case S_TRISTATE: if (p[0] == 'm') { sym->def[def].tri = mod; sym->flags |= def_flags; break; } /* fall through */ case S_BOOLEAN: if (p[0] == 'y') { sym->def[def].tri = yes; sym->flags |= def_flags; break; } if (p[0] == 'n') { sym->def[def].tri = no; sym->flags |= def_flags; break; } if (def != S_DEF_AUTO) conf_warning("symbol value '%s' invalid for %s", p, sym->name); return 1; case S_STRING: /* No escaping for S_DEF_AUTO (include/config/auto.conf) */ if (def != S_DEF_AUTO) { if (*p++ != '"') break; for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) { if (*p2 == '"') { *p2 = 0; break; } memmove(p2, p2 + 1, strlen(p2)); } if (!p2) { conf_warning("invalid string found"); return 1; } } /* fall through */ case S_INT: case S_HEX: if (sym_string_valid(sym, p)) { sym->def[def].val = xstrdup(p); sym->flags |= def_flags; } else { if (def != S_DEF_AUTO) conf_warning("symbol value '%s' invalid for %s", p, sym->name); return 1; } break; default: ; } return 0;} /* like getline(), but the newline character is stripped away */static ssize_t getline_stripped(char **lineptr, size_t *n, FILE *stream){ ssize_t len; len = getline(lineptr, n, stream); if (len > 0 && (*lineptr)[len - 1] == '\n') { len--; (*lineptr)[len] = '\0'; if (len > 0 && (*lineptr)[len - 1] == '\r') { len--; (*lineptr)[len] = '\0'; } } return len;} int conf_read_simple(const char *name, int def){ FILE *in = NULL; char *line = NULL; size_t line_asize = 0; char *p, *val; struct symbol *sym; int def_flags; const char *warn_unknown, *sym_name; warn_unknown = getenv("KCONFIG_WARN_UNKNOWN_SYMBOLS"); if (name) { in = zconf_fopen(name); } else { char *env; name = conf_get_configname(); in = zconf_fopen(name); if (in) goto load; conf_set_changed(true); env = getenv("KCONFIG_DEFCONFIG_LIST"); if (!env) return 1; while (1) { bool is_last; while (isspace(*env)) env++; if (!*env) break; p = env; while (*p && !isspace(*p)) p++; is_last = (*p == '\0'); *p = '\0'; name = env; in = zconf_fopen(name); if (in) { conf_message("using defaults found in %s", name); goto load; } if (is_last) break; env = p + 1; } } if (!in) return 1; load: conf_filename = name; conf_lineno = 0; conf_warnings = 0; def_flags = SYMBOL_DEF << def; for_all_symbols(sym) { sym->flags &= ~(def_flags|SYMBOL_VALID); switch (sym->type) { case S_INT: case S_HEX: case S_STRING: free(sym->def[def].val); /* fall through */ default: sym->def[def].val = NULL; sym->def[def].tri = no; } } expr_invalidate_all(); while (getline_stripped(&line, &line_asize, in) != -1) { struct menu *choice; conf_lineno++; if (!line[0]) /* blank line */ continue; if (line[0] == '#') { if (line[1] != ' ') continue; p = line + 2; if (memcmp(p, CONFIG_, strlen(CONFIG_))) continue; sym_name = p + strlen(CONFIG_); p = strchr(sym_name, ' '); if (!p) continue; *p++ = 0; if (strcmp(p, "is not set")) continue; val = "n"; } else { if (memcmp(line, CONFIG_, strlen(CONFIG_))) { conf_warning("unexpected data: %s", line); continue; } sym_name = line + strlen(CONFIG_); p = strchr(sym_name, '='); if (!p) { conf_warning("unexpected data: %s", line); continue; } *p = 0; val = p + 1; } sym = sym_find(sym_name); if (!sym) { if (def == S_DEF_AUTO) { /* * Reading from include/config/auto.conf. * If CONFIG_FOO previously existed in auto.conf * but it is missing now, include/config/FOO * must be touched. */ conf_touch_dep(sym_name); } else { if (warn_unknown) conf_warning("unknown symbol: %s", sym_name); conf_set_changed(true); } continue; } if (sym->flags & def_flags) conf_warning("override: reassigning to symbol %s", sym->name); if (conf_set_sym_val(sym, def, def_flags, val)) continue; /* * If this is a choice member, give it the highest priority. * If conflicting CONFIG options are given from an input file, * the last one wins. */ choice = sym_get_choice_menu(sym); if (choice) list_move(&sym->choice_link, &choice->choice_members); } free(line); fclose(in); return 0;} int conf_read(const char *name){ struct symbol *sym; conf_set_changed(false); if (conf_read_simple(name, S_DEF_USER)) { sym_calc_value(modules_sym); return 1; } sym_calc_value(modules_sym); for_all_symbols(sym) { sym_calc_value(sym); if (sym_is_choice(sym)) continue; if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) { /* check that calculated value agrees with saved value */Lines 1–500 of 1138. 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// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org> */ #include <sys/mman.h> #include <sys/stat.h> #include <sys/types.h> #include <ctype.h> #include <errno.h> #include <fcntl.h> #include <limits.h> #include <stdarg.h> #include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <time.h> #include <unistd.h> #include <xalloc.h> #include "internal.h" #include "lkc.h" struct gstr autoconf_cmd; /* return true if 'path' exists, false otherwise */ static bool is_present(const char *path) { struct stat st; return !stat(path, &st); } /* return true if 'path' exists and it is a directory, false otherwise */ static bool is_dir(const char *path) { struct stat st; if (stat(path, &st)) return false; return S_ISDIR(st.st_mode); } /* return true if the given two files are the same, false otherwise */ static bool is_same(const char *file1, const char *file2) { int fd1, fd2; struct stat st1, st2; void *map1, *map2; bool ret = false; fd1 = open(file1, O_RDONLY); if (fd1 < 0) return ret; fd2 = open(file2, O_RDONLY); if (fd2 < 0) goto close1; ret = fstat(fd1, &st1); if (ret) goto close2; ret = fstat(fd2, &st2); if (ret) goto close2; if (st1.st_size != st2.st_size) goto close2; map1 = mmap(NULL, st1.st_size, PROT_READ, MAP_PRIVATE, fd1, 0); if (map1 == MAP_FAILED) goto close2; map2 = mmap(NULL, st2.st_size, PROT_READ, MAP_PRIVATE, fd2, 0); if (map2 == MAP_FAILED) goto close2; if (bcmp(map1, map2, st1.st_size)) goto close2; ret = true; close2: close(fd2); close1: close(fd1); return ret; } /* * Create the parent directory of the given path. * * For example, if 'include/config/auto.conf' is given, create 'include/config'. */ static int make_parent_dir(const char *path) { char tmp[PATH_MAX + 1]; char *p; strncpy(tmp, path, sizeof(tmp)); tmp[sizeof(tmp) - 1] = 0; /* Remove the base name. Just return if nothing is left */ p = strrchr(tmp, '/'); if (!p) return 0; *(p + 1) = 0; /* Just in case it is an absolute path */ p = tmp; while (*p == '/') p++; while ((p = strchr(p, '/'))) { *p = 0; /* skip if the directory exists */ if (!is_dir(tmp) && mkdir(tmp, 0755)) return -1; *p = '/'; while (*p == '/') p++; } return 0; } static char depfile_path[PATH_MAX]; static size_t depfile_prefix_len; /* touch depfile for symbol 'name' */ static int conf_touch_dep(const char *name) { int fd; /* check overflow: prefix + name + '\0' must fit in buffer. */ if (depfile_prefix_len + strlen(name) + 1 > sizeof(depfile_path)) return -1; strcpy(depfile_path + depfile_prefix_len, name); fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); if (fd == -1) return -1; close(fd); return 0; } static void conf_warning(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); static void conf_message(const char *fmt, ...) __attribute__ ((format (printf, 1, 2))); static const char *conf_filename; static int conf_lineno, conf_warnings; bool conf_errors(void) { if (conf_warnings) return getenv("KCONFIG_WERROR"); return false; } static void conf_warning(const char *fmt, ...) { va_list ap; va_start(ap, fmt); fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno); vfprintf(stderr, fmt, ap); fprintf(stderr, "\n"); va_end(ap); conf_warnings++; } static void conf_default_message_callback(const char *s) { printf("#\n# "); printf("%s", s); printf("\n#\n"); } static void (*conf_message_callback)(const char *s) = conf_default_message_callback; void conf_set_message_callback(void (*fn)(const char *s)) { conf_message_callback = fn; } static void conf_message(const char *fmt, ...) { va_list ap; char buf[4096]; if (!conf_message_callback) return; va_start(ap, fmt); vsnprintf(buf, sizeof(buf), fmt, ap); conf_message_callback(buf); va_end(ap); } const char *conf_get_configname(void) { char *name = getenv("KCONFIG_CONFIG"); return name ? name : ".config"; } static const char *conf_get_autoconfig_name(void) { char *name = getenv("KCONFIG_AUTOCONFIG"); return name ? name : "include/config/auto.conf"; } static const char *conf_get_autoheader_name(void) { char *name = getenv("KCONFIG_AUTOHEADER"); return name ? name : "include/generated/autoconf.h"; } static const char *conf_get_rustccfg_name(void) { char *name = getenv("KCONFIG_RUSTCCFG"); return name ? name : "include/generated/rustc_cfg"; } static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p) { char *p2; switch (sym->type) { case S_TRISTATE: if (p[0] == 'm') { sym->def[def].tri = mod; sym->flags |= def_flags; break; } /* fall through */ case S_BOOLEAN: if (p[0] == 'y') { sym->def[def].tri = yes; sym->flags |= def_flags; break; } if (p[0] == 'n') { sym->def[def].tri = no; sym->flags |= def_flags; break; } if (def != S_DEF_AUTO) conf_warning("symbol value '%s' invalid for %s", p, sym->name); return 1; case S_STRING: /* No escaping for S_DEF_AUTO (include/config/auto.conf) */ if (def != S_DEF_AUTO) { if (*p++ != '"') break; for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) { if (*p2 == '"') { *p2 = 0; break; } memmove(p2, p2 + 1, strlen(p2)); } if (!p2) { conf_warning("invalid string found"); return 1; } } /* fall through */ case S_INT: case S_HEX: if (sym_string_valid(sym, p)) { sym->def[def].val = xstrdup(p); sym->flags |= def_flags; } else { if (def != S_DEF_AUTO) conf_warning("symbol value '%s' invalid for %s", p, sym->name); return 1; } break; default: ; } return 0; } /* like getline(), but the newline character is stripped away */ static ssize_t getline_stripped(char **lineptr, size_t *n, FILE *stream) { ssize_t len; len = getline(lineptr, n, stream); if (len > 0 && (*lineptr)[len - 1] == '\n') { len--; (*lineptr)[len] = '\0'; if (len > 0 && (*lineptr)[len - 1] == '\r') { len--; (*lineptr)[len] = '\0'; } } return len; } int conf_read_simple(const char *name, int def) { FILE *in = NULL; char *line = NULL; size_t line_asize = 0; char *p, *val; struct symbol *sym; int def_flags; const char *warn_unknown, *sym_name; warn_unknown = getenv("KCONFIG_WARN_UNKNOWN_SYMBOLS"); if (name) { in = zconf_fopen(name); } else { char *env; name = conf_get_configname(); in = zconf_fopen(name); if (in) goto load; conf_set_changed(true); env = getenv("KCONFIG_DEFCONFIG_LIST"); if (!env) return 1; while (1) { bool is_last; while (isspace(*env)) env++; if (!*env) break; p = env; while (*p && !isspace(*p)) p++; is_last = (*p == '\0'); *p = '\0'; name = env; in = zconf_fopen(name); if (in) { conf_message("using defaults found in %s", name); goto load; } if (is_last) break; env = p + 1; } } if (!in) return 1; load: conf_filename = name; conf_lineno = 0; conf_warnings = 0; def_flags = SYMBOL_DEF << def; for_all_symbols(sym) { sym->flags &= ~(def_flags|SYMBOL_VALID); switch (sym->type) { case S_INT: case S_HEX: case S_STRING: free(sym->def[def].val); /* fall through */ default: sym->def[def].val = NULL; sym->def[def].tri = no; } } expr_invalidate_all(); while (getline_stripped(&line, &line_asize, in) != -1) { struct menu *choice; conf_lineno++; if (!line[0]) /* blank line */ continue; if (line[0] == '#') { if (line[1] != ' ') continue; p = line + 2; if (memcmp(p, CONFIG_, strlen(CONFIG_))) continue; sym_name = p + strlen(CONFIG_); p = strchr(sym_name, ' '); if (!p) continue; *p++ = 0; if (strcmp(p, "is not set")) continue; val = "n"; } else { if (memcmp(line, CONFIG_, strlen(CONFIG_))) { conf_warning("unexpected data: %s", line); continue; } sym_name = line + strlen(CONFIG_); p = strchr(sym_name, '='); if (!p) { conf_warning("unexpected data: %s", line); continue; } *p = 0; val = p + 1; } sym = sym_find(sym_name); if (!sym) { if (def == S_DEF_AUTO) { /* * Reading from include/config/auto.conf. * If CONFIG_FOO previously existed in auto.conf * but it is missing now, include/config/FOO * must be touched. */ conf_touch_dep(sym_name); } else { if (warn_unknown) conf_warning("unknown symbol: %s", sym_name); conf_set_changed(true); } continue; } if (sym->flags & def_flags) conf_warning("override: reassigning to symbol %s", sym->name); if (conf_set_sym_val(sym, def, def_flags, val)) continue; /* * If this is a choice member, give it the highest priority. * If conflicting CONFIG options are given from an input file, * the last one wins. */ choice = sym_get_choice_menu(sym); if (choice) list_move(&sym->choice_link, &choice->choice_members); } free(line); fclose(in); return 0; } int conf_read(const char *name) { struct symbol *sym; conf_set_changed(false); if (conf_read_simple(name, S_DEF_USER)) { sym_calc_value(modules_sym); return 1; } sym_calc_value(modules_sym); for_all_symbols(sym) { sym_calc_value(sym); if (sym_is_choice(sym)) continue; if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) { /* check that calculated value agrees with saved value */