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149 lines
3.3 KiB
149 lines
3.3 KiB
/*
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* bar.c - status line handling functions
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* Copyright (C) 2014 Vivien Didelot
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <signal.h>
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#include <stddef.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <time.h>
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#include <unistd.h>
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#include "bar.h"
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#include "block.h"
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#include "click.h"
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#include "io.h"
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#include "log.h"
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void
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bar_poll_timed(struct bar *bar)
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{
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for (int i = 0; i < bar->num; ++i) {
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struct block *block = bar->blocks + i;
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/* spawn unless it is only meant for click or signal */
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if (block->interval != 0)
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block_spawn(block, NULL);
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}
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}
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void
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bar_poll_clicked(struct bar *bar)
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{
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char json[1024] = { 0 };
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while (io_readline(STDIN_FILENO, json, sizeof(json)) > 0) {
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struct click click;
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/* find the corresponding block */
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click_parse(json, &click);
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if (!*click.name && !*click.instance)
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continue;
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for (int i = 0; i < bar->num; ++i) {
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struct block *block = bar->blocks + i;
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if (strcmp(NAME(block), click.name) == 0 && strcmp(INSTANCE(block), click.instance) == 0) {
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bdebug(block, "clicked");
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block_spawn(block, &click);
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break; /* Unlikely to click several blocks */
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}
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}
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}
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}
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void
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bar_poll_outdated(struct bar *bar)
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{
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for (int i = 0; i < bar->num; ++i) {
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struct block *block = bar->blocks + i;
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if (block->interval > 0) {
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const unsigned long now = time(NULL);
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const unsigned long next_update = block->timestamp + block->interval;
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if (((long) (next_update - now)) <= 0) {
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bdebug(block, "outdated");
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block_spawn(block, NULL);
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}
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}
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}
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}
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void
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bar_poll_signaled(struct bar *bar, int sig)
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{
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for (int i = 0; i < bar->num; ++i) {
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struct block *block = bar->blocks + i;
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if (block->signal == sig) {
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bdebug(block, "signaled");
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block_spawn(block, NULL);
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}
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}
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}
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void
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bar_poll_exited(struct bar *bar)
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{
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for (;;) {
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siginfo_t infop = { 0 };
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/* Non-blocking check for dead child(ren) */
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if (waitid(P_ALL, 0, &infop, WEXITED | WNOHANG | WNOWAIT) == -1)
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if (errno != ECHILD)
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errorx("waitid");
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/* Error or no (dead yet) child(ren) */
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if (infop.si_pid == 0)
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break;
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/* Find the dead process */
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for (int i = 0; i < bar->num; ++i) {
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struct block *block = bar->blocks + i;
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if (block->pid == infop.si_pid) {
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bdebug(block, "exited");
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block_reap(block);
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if (block->interval == INTER_REPEAT) {
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if (block->timestamp == time(NULL))
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berror(block, "loop too fast");
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block_spawn(block, NULL);
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} else if (block->interval == INTER_PERSIST) {
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bdebug(block, "unexpected exit?");
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}
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break;
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}
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}
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}
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}
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void
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bar_poll_readable(struct bar *bar, const int fd)
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{
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for (int i = 0; i < bar->num; ++i) {
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struct block *block = bar->blocks + i;
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if (block->out == fd) {
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bdebug(block, "readable");
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block_update(block);
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break;
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}
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}
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}
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