Function ap_build_config_sub

server/config.c:1110–1246

                               ap_directive_t *parent);

static const char *ap_build_config_sub(apr_pool_t *p, apr_pool_t *temp_pool,
                                       const char *l, cmd_parms *parms,
                                       ap_directive_t **current,
                                       ap_directive_t **curr_parent,
                                       ap_directive_t **conftree)
{
    const char *retval = NULL;
    const char *args;
    char *cmd_name;
    ap_directive_t *newdir;
    const command_rec *cmd;
    ap_mod_list *ml;
    char *lname;

    if (*l == '#' || *l == '\0')
        return NULL;

#if RESOLVE_ENV_PER_TOKEN
    args = l;
#else
    args = ap_resolve_env(temp_pool, l);
#endif

    /* The first word is the name of a directive.  We can safely use the
     * 'temp_pool' for it.  If it matches the name of a known directive, we
     * can reference the string within the module if needed.  Otherwise, we
     * can still make a copy in the 'p' pool. */
    cmd_name = ap_getword_conf(temp_pool, &args);
    if (*cmd_name == '\0') {
        /* Note: this branch should not occur. An empty line should have
         * triggered the exit further above.
         */
        return NULL;
    }

    if (cmd_name[1] != '/') {
        char *lastc = cmd_name + strlen(cmd_name) - 1;
        if (*lastc == '>') {
            *lastc = '\0' ;
        }
        if (cmd_name[0] == '<' && *args == '\0') {
            args = ">";
        }
    }

    newdir = apr_pcalloc(p, sizeof(ap_directive_t));
    newdir->filename = parms->config_file->name;
    newdir->line_num = parms->config_file->line_number;
    newdir->args = apr_pstrdup(p, args);

    lname = apr_pstrdup(temp_pool, cmd_name);
    ap_str_tolower(lname);
    ml = apr_hash_get(ap_config_hash, lname, APR_HASH_KEY_STRING);

    if (ml && (cmd = ml->cmd) != NULL) {
        newdir->directive = cmd->name;
        if (cmd->req_override & EXEC_ON_READ) {
            ap_directive_t *sub_tree = NULL;