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config: Add option to NOT preserve effective context when changing a template

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Let's say you have a template T with variable VAR1 = ON and you have a
context C(T) that doesn't specify VAR1.  If you read C, the effective value
of VAR1 is ON.  Now you change T VAR1 to OFF and call
ast_config_text_file_save.  The current behavior is that the file gets
re-written with T/VAR1=OFF but C/VAR1=ON is added.  Personally, I think this
is a bug. It's preserving the effective state of C even though I didn't
specify C/VAR1 in th first place.  I believe the behavior should be that if
I didn't specify C/VAR1 originally, then the effective value of C/VAR1 should
continue to follow the inherited state.  Now, if I DID explicitly specify
C/VAR1, the it should be preserved even if the template changes.

Even though I think the existing behavior is a bug, it's been that way forever
so I'm not changing it.  Instead, I've created ast_config_text_file_save2()
that takes a bitmask of flags, one of which is to preserve the effective context
(the current behavior).  The original ast_config_text_file_save calls *2 with
the preserve flag.  If you want the new behavior, call *2 directly without a
flag.

I've also updated Manager UpdateConfig with a new parameter
'PreserveEffectiveContext' whose default is 'yes'.  If you want the new behavior
with UpdateConfig, set 'PreserveEffectiveContext: no'.

Tested-by: George Joseph

Review: https://reviewboard.asterisk.org/r/4297/
........

Merged revisions 430295 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@430296 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
George Joseph
2015-01-07 16:56:59 +00:00
parent 0c5234f12a
commit 56de48107f
3 changed files with 70 additions and 9 deletions
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36
main/config.c
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@@ -1250,8 +1250,11 @@ void ast_category_inherit(struct ast_category *new, const struct ast_category *b
strcpy(x->name, base->name);
x->inst = base;
AST_LIST_INSERT_TAIL(&new->template_instances, x, next);
for (var = base->root; var; var = var->next)
ast_variable_append(new, variable_clone(var));
for (var = base->root; var; var = var->next) {
struct ast_variable *cloned = variable_clone(var);
cloned->inherited = 1;
ast_variable_append(new, cloned);
}
}
struct ast_config *ast_config_new(void)
@@ -2358,10 +2361,15 @@ static void insert_leading_blank_lines(FILE *fp, struct inclfile *fi, struct ast
int config_text_file_save(const char *configfile, const struct ast_config *cfg, const char *generator)
{
return ast_config_text_file_save(configfile, cfg, generator);
return ast_config_text_file_save2(configfile, cfg, generator, CONFIG_SAVE_FLAG_PRESERVE_EFFECTIVE_CONTEXT);
}
int ast_config_text_file_save(const char *configfile, const struct ast_config *cfg, const char *generator)
{
return ast_config_text_file_save2(configfile, cfg, generator, CONFIG_SAVE_FLAG_PRESERVE_EFFECTIVE_CONTEXT);
}
int ast_config_text_file_save2(const char *configfile, const struct ast_config *cfg, const char *generator, uint32_t flags)
{
FILE *f;
char fn[PATH_MAX];
@@ -2522,13 +2530,27 @@ int ast_config_text_file_save(const char *configfile, const struct ast_config *c
AST_LIST_TRAVERSE(&cat->template_instances, x, next) {
struct ast_variable *v;
for (v = x->inst->root; v; v = v->next) {
if (!strcasecmp(var->name, v->name) && !strcmp(var->value, v->value)) {
found = 1;
break;
if (flags & CONFIG_SAVE_FLAG_PRESERVE_EFFECTIVE_CONTEXT) {
if (!strcasecmp(var->name, v->name) && !strcmp(var->value, v->value)) {
found = 1;
break;
}
} else {
if (var->inherited) {
found = 1;
break;
} else {
if (!strcasecmp(var->name, v->name) && !strcmp(var->value, v->value)) {
found = 1;
break;
}
}
}
}
if (found)
if (found) {
break;
}
}
if (found) {
var = var->next;