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Subject[PATCH 3/5] kconfig: split out code touching a file to conf_touch_dep()
Date
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 <yamada.masahiro@socionext.com>
---

scripts/kconfig/confdata.c | 92 ++++++++++++++++++++++++----------------------
1 file changed, 49 insertions(+), 43 deletions(-)

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 4c76d56..7263b83 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/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 fix 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 *);
@@ -909,21 +950,16 @@ 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/config/");
+ 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/config/foo.h"))
- return 1;
- if (chdir("include/config"))
- return 1;
-
- res = 0;
for_all_symbols(i, sym) {
sym_calc_value(sym);
if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name)
@@ -975,42 +1011,12 @@ 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(int overwrite)
--
2.7.4
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