void
block_update(struct block *block)
{
struct properties *props = &block->updated_props;
char buf[2048] = { 0 };
int nr;
/* Read a single line for persistent block, everything otherwise */
if (block->interval == INTER_PERSIST) {
nr = io_readline(block->out, buf, sizeof(buf));
if (nr < 0) {
berror(block, "failed to read a line");
return mark_as_failed(block, "failed to read");
} else if (nr == 0) {
berror(block, "pipe closed");
return mark_as_failed(block, "pipe closed");
}
} else {
/* Note: read(2) returns 0 for end-of-pipe */
if (read(block->out, buf, sizeof(buf) - 1) == -1) {
berrorx(block, "read stdout");
return mark_as_failed(block, strerror(errno));
}
}
/* Reset the defaults and merge the output */
memcpy(props, &block->default_props, sizeof(struct properties));
if (block->format == FORMAT_JSON)
block_update_json(block, buf);
else
block_update_plain_text(block, buf);
if (*FULL_TEXT(block) && *LABEL(block)) {
static const size_t size = sizeof(props->full_text);
char concat[size];
snprintf(concat, size, "%s %s", LABEL(block), FULL_TEXT(block));
strcpy(props->full_text, concat);
}
bdebug(block, "updated successfully");
}
void
json_print_bar(struct bar *bar)
{
fprintf(stdout, ",[{\"full_text\":\"\"}");
for (int i = 0; i < bar->num; ++i) {
struct block *block = bar->blocks + i;
/* full_text is the only mandatory key, skip if empty */
if (!*FULL_TEXT(block)) {
bdebug(block, "no text to display, skipping");
continue;
}
print_block(block);
}
fprintf(stdout, "]\n");
fflush(stdout);
}
