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kconfig: remove 'const' from the return type of sym_escape_string_value()

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sym_escape_string_value() returns a malloc'ed memory, but as
(const char *). So, it must be casted to (void *) when it is free'd.
This is odd.

The return type of sym_escape_string_value() should be (char *).

I exploited that free(NULL) has no effect.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Masahiro Yamada 2021-10-01 14:32:44 +09:00
parent 6988f70cf1
commit 229d0cfae5
4 changed files with 24 additions and 23 deletions
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15
scripts/kconfig/conf.c
View File

@ -647,17 +647,16 @@ static void check_conf(struct menu *menu)
switch (input_mode) {
case listnewconfig:
if (sym->name) {
const char *str;
const char *val = sym_get_string_value(sym);
char *escaped = NULL;
if (sym->type == S_STRING) {
str = sym_get_string_value(sym);
str = sym_escape_string_value(str);
printf("%s%s=%s\n", CONFIG_, sym->name, str);
free((void *)str);
} else {
str = sym_get_string_value(sym);
printf("%s%s=%s\n", CONFIG_, sym->name, str);
escaped = sym_escape_string_value(val);
val = escaped;
}
printf("%s%s=%s\n", CONFIG_, sym->name, val);
free(escaped);
}
break;
case helpnewconfig:

27
scripts/kconfig/confdata.c
View File

@ -728,21 +728,22 @@ static struct conf_printer header_printer_cb =
static void conf_write_symbol(FILE *fp, struct symbol *sym,
struct conf_printer *printer, void *printer_arg)
{
const char *str;
const char *val;
char *escaped = NULL;
switch (sym->type) {
case S_UNKNOWN:
break;
case S_STRING:
str = sym_get_string_value(sym);
str = sym_escape_string_value(str);
printer->print_symbol(fp, sym, str, printer_arg);
free((void *)str);
break;
default:
str = sym_get_string_value(sym);
printer->print_symbol(fp, sym, str, printer_arg);
if (sym->type == S_UNKNOWN)
return;
val = sym_get_string_value(sym);
if (sym->type == S_STRING) {
escaped = sym_escape_string_value(val);
val = escaped;
}
printer->print_symbol(fp, sym, val, printer_arg);
free(escaped);
}
static void

2
scripts/kconfig/lkc_proto.h
View File

@ -18,7 +18,7 @@ extern struct symbol * symbol_hash[SYMBOL_HASHSIZE];
struct symbol * sym_lookup(const char *name, int flags);
struct symbol * sym_find(const char *name);
const char * sym_escape_string_value(const char *in);
char *sym_escape_string_value(const char *in);
struct symbol ** sym_re_search(const char *pattern);
const char * sym_type_name(enum symbol_type type);
void sym_calc_value(struct symbol *sym);

3
scripts/kconfig/symbol.c
View File

@ -871,7 +871,8 @@ struct symbol *sym_find(const char *name)
return symbol;
}
const char *sym_escape_string_value(const char *in)
/* The returned pointer must be freed on the caller side */
char *sym_escape_string_value(const char *in)
{
const char *p;
size_t reslen;