diff options
Diffstat (limited to 'scripts/kconfig/confdata.c')
| -rw-r--r-- | scripts/kconfig/confdata.c | 121 |
1 files changed, 119 insertions, 2 deletions
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c index ca693fcd023f..e28cd0c2ca08 100644 --- a/scripts/kconfig/confdata.c +++ b/scripts/kconfig/confdata.c @@ -5,6 +5,7 @@ #include <sys/stat.h> #include <ctype.h> +#include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -520,6 +521,119 @@ int conf_write(const char *name) return 0; } +int conf_split_config(void) +{ + char *name, path[128]; + char *s, *d, c; + struct symbol *sym; + struct stat sb; + int res, i, fd; + + name = getenv("KCONFIG_AUTOCONFIG"); + if (!name) + name = "include/config/auto.conf"; + conf_read_simple(name, S_DEF_AUTO); + + if (chdir("include/config")) + return 1; + + res = 0; + for_all_symbols(i, sym) { + sym_calc_value(sym); + if ((sym->flags & SYMBOL_AUTO) || !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'). + */ + + /* Replace all '_' and append ".h" */ + s = sym->name; + d = path; + while ((c = *s++)) { + c = tolower(c); + *d++ = (c == '_') ? '/' : c; + } + strcpy(d, ".h"); + + /* Assume directory path already exists. */ + fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); + if (fd == -1) { + if (errno != ENOENT) { + res = 1; + break; + } + /* + * Create directory components, + * unless they exist already. + */ + d = path; + while ((d = strchr(d, '/'))) { + *d = 0; + if (stat(path, &sb) && mkdir(path, 0755)) { + res = 1; + goto out; + } + *d++ = '/'; + } + /* Try it again. */ + fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); + if (fd == -1) { + res = 1; + break; + } + } + close(fd); + } +out: + if (chdir("../..")) + return 1; + + return res; +} + int conf_write_autoconf(void) { struct symbol *sym; @@ -529,8 +643,13 @@ int conf_write_autoconf(void) time_t now; int i, l; + sym_clear_all_valid(); + file_write_dep("include/config/auto.conf.cmd"); + if (conf_split_config()) + return 1; + out = fopen(".tmpconfig", "w"); if (!out) return 1; @@ -558,8 +677,6 @@ int conf_write_autoconf(void) "#define AUTOCONF_INCLUDED\n", sym_get_string_value(sym), ctime(&now)); - sym_clear_all_valid(); - for_all_symbols(i, sym) { sym_calc_value(sym); if (!(sym->flags & SYMBOL_WRITE) || !sym->name) |