dwm/patch/dwmblocks.c
2020-05-02 14:58:23 +02:00

31 lines
584 B
C

static int dwmblockssig;
pid_t dwmblockspid = 0;
int
getdwmblockspid()
{
char buf[16];
FILE *fp = popen("pidof -s dwmblocks", "r");
if (fgets(buf, sizeof(buf), fp));
pid_t pid = strtoul(buf, NULL, 10);
pclose(fp);
dwmblockspid = pid;
return pid != 0 ? 0 : -1;
}
void
sigdwmblocks(const Arg *arg)
{
union sigval sv;
sv.sival_int = (dwmblockssig << 8) | arg->i;
if (!dwmblockspid)
if (getdwmblockspid() == -1)
return;
if (sigqueue(dwmblockspid, SIGUSR1, sv) == -1) {
if (errno == ESRCH) {
if (!getdwmblockspid())
sigqueue(dwmblockspid, SIGUSR1, sv);
}
}
}