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Refresh all blocks on receiving SIGUSR1

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Utkarsh Verma 2022-02-16 14:11:07 +05:30
parent 4f4976500a
commit 1676c07b8f
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GPG Key ID: 817656CF818EFCCC
2 changed files with 15 additions and 4 deletions
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2
README.md
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@ -113,6 +113,8 @@ My volume block *never* updates on its own, instead I have this command run alon
Note that all blocks must have different signal numbers.
Apart from this, you can also refresh all the blocks by sending `SIGUSR1` to `dwmblocks-async` using either `pkill -SIGUSR1 dwmblocks` or `kill -10 $(pidof dwmblocks)`.
### Clickable blocks
Like `i3blocks`, this build allows you to build in additional actions into your scripts in response to click events. You can check out [my statusbar scripts](https://github.com/UtkarshVerma/dotfiles/tree/main/.local/bin/statusbar) as references for using the `$BLOCK_BUTTON` variable.

17
main.c
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@ -38,7 +38,7 @@ typedef const struct {
static Display* dpy;
static int screen;
static Window root;
static unsigned short int statusContinue = 1;
static unsigned short statusContinue = 1;
static char outputs[LEN(blocks)][CMDLENGTH + 1 + CLICKABLE_BLOCKS];
static char statusBar[2][LEN(blocks) * (LEN(outputs[0]) - 1) + (LEN(blocks) - 1 + LEADING_DELIMITER) * (LEN(DELIMITER) - 1) + 1];
static struct epoll_event event, events[LEN(blocks) + 2];
@ -167,9 +167,16 @@ void setRoot() {
void signalHandler() {
struct signalfd_siginfo info;
read(signalFD, &info, sizeof(info));
unsigned int signal = info.ssi_signo;
// Update all blocks on receiving SIGUSR1
if (signal == SIGUSR1) {
execBlocks(0);
return;
}
for (int j = 0; j < LEN(blocks); j++) {
if (blocks[j].signal == info.ssi_signo - SIGRTMIN) {
if (blocks[j].signal == signal - SIGRTMIN) {
char button[] = {'0' + info.ssi_int & 0xff, 0};
execBlock(j, button);
break;
@ -182,9 +189,10 @@ void termHandler() {
}
void setupSignals() {
// Ignore all realtime signals
// Ignore SIGUSR1 and all realtime signals
sigset_t ignoredSignals;
sigemptyset(&ignoredSignals);
sigaddset(&ignoredSignals, SIGUSR1);
for (int i = SIGRTMIN; i <= SIGRTMAX; i++)
sigaddset(&ignoredSignals, i);
sigprocmask(SIG_BLOCK, &ignoredSignals, NULL);
@ -203,6 +211,7 @@ void setupSignals() {
// Handle block update signals
sigset_t handledSignals;
sigemptyset(&handledSignals);
sigaddset(&handledSignals, SIGUSR1);
for (int i = 0; i < LEN(blocks); i++)
if (blocks[i].signal > 0)
sigaddset(&handledSignals, SIGRTMIN + blocks[i].signal);
@ -215,7 +224,7 @@ void statusLoop() {
while (statusContinue) {
int eventCount = epoll_wait(epollFD, events, LEN(events), -1);
for (int i = 0; i < eventCount; i++) {
unsigned short int id = events[i].data.u32;
unsigned short id = events[i].data.u32;
if (id == LEN(blocks)) {
unsigned int j = 0;