From 30bdcddc761d069a0a0cb94a627f41af0a385196 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Fri, 30 Nov 2018 18:15:50 +0900 Subject: [PATCH] kconfig: split out code touching a file to conf_touch_dep() conf_touch_deps() iterates over symbols, touching corresponding include/config/*.h files as needed. Split the part that touches a single file into a new helper so it can be reused. The new helper, conf_touch_dep(), takes a symbol name as a parameter, and touches the corresponding include/config/*.h file. Signed-off-by: Masahiro Yamada Signed-off-by: Christian Lamparter --- config/confdata.c | 92 +++++++++++++++++++++++++---------------------- 1 file changed, 49 insertions(+), 43 deletions(-) diff --git a/config/confdata.c b/config/confdata.c index 7ba857c..c0a4e51 100644 --- a/config/confdata.c +++ b/config/confdata.c @@ -74,6 +74,47 @@ static int make_parent_dir(const char *path) 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, ret; + const char *s; + char *d, c; + + /* check overflow: prefix + name + ".h" + '\0' must fit in buffer. */ + if (depfile_prefix_len + strlen(name) + 3 > sizeof(depfile_path)) + return -1; + + d = depfile_path + depfile_prefix_len; + s = name; + + while ((c = *s++)) + *d++ = (c == '_') ? '/' : tolower(c); + strcpy(d, ".h"); + + /* Assume directory path already exists. */ + fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); + if (fd == -1) { + if (errno != ENOENT) + return -1; + + ret = make_parent_dir(depfile_path); + if (ret) + return ret; + + /* Try it again. */ + fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); + if (fd == -1) + return -1; + } + close(fd); + + return 0; +} + struct conf_printer { void (*print_symbol)(FILE *, struct symbol *, const char *, void *); void (*print_comment)(FILE *, const char *, void *); @@ -955,21 +996,16 @@ static int conf_write_dep(const char *name) static int conf_touch_deps(void) { const char *name; - char path[PATH_MAX+1]; - char *s, *d, c; struct symbol *sym; - int res, i, fd; + int res, i; + + strcpy(depfile_path, "include/generated/"); + depfile_prefix_len = strlen(depfile_path); name = conf_get_autoconfig_name(); conf_read_simple(name, S_DEF_AUTO); sym_calc_value(modules_sym); - if (make_parent_dir("include/generated/foo.h")) - return 1; - if (chdir("include/generated")) - return 1; - - res = 0; for_all_symbols(i, sym) { sym_calc_value(sym); if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name) @@ -1021,42 +1057,12 @@ static int conf_touch_deps(void) * 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; - } - - if (make_parent_dir(path)) { - res = 1; - goto out; - } - - /* Try it again. */ - fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); - if (fd == -1) { - res = 1; - break; - } - } - close(fd); + res = conf_touch_dep(sym->name); + if (res) + return res; } -out: - if (chdir("../..")) - return 1; - return res; + return 0; } int conf_write_autoconf(void) -- 2.31.1