On 20.05.2020 15:38, Jiri Olsa wrote:
> On Wed, May 13, 2020 at 11:00:02AM +0300, Alexey Budankov wrote:
>
> SNIP
>
>> +
>> +static int evlist__ctlfd_recv(struct evlist *evlist, enum evlist_ctl_cmd
>> *cmd,
>> + char *cmd_data, size_t data_size)
>> +{
>> + int err;
>> + char c;
>> + size_t bytes_read = 0;
>> +
>> + memset(cmd_data, 0, data_size--);
>> +
>> + do {
>> + err = read(evlist->ctl_fd, &c, 1);
>> + if (err > 0) {
>> + if (c == '\n' || c == '\0')
>> + break;
>> + cmd_data[bytes_read++] = c;
>> + if (bytes_read == data_size)
>> + break;
>> + } else {
>> + if (err == -1)
>> + pr_err("Failed to read from ctlfd %d: %m\n",
>> evlist->ctl_fd);
>> + break;
>> + }
>> + } while (1);
>> +
>> + pr_debug("Message from ctl_fd: \"%s%s\"\n", cmd_data,
>> + bytes_read == data_size ? "" : c == '\n' ? "\\n" : "\\0");
>> +
>> + if (err > 0) {
>> + if (!strncmp(cmd_data, EVLIST_CTL_CMD_ENABLE_TAG,
>> + strlen(EVLIST_CTL_CMD_ENABLE_TAG))) {
>> + *cmd = EVLIST_CTL_CMD_ENABLE;
>> + } else if (!strncmp(cmd_data, EVLIST_CTL_CMD_DISABLE_TAG,
>> + strlen(EVLIST_CTL_CMD_DISABLE_TAG))) {
>> + *cmd = EVLIST_CTL_CMD_DISABLE;
>> + }
>
> are there more comands comming?
Currently no.
~Alexey
