cosmopolitan/examples/pause.c

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#if 0
/*─────────────────────────────────────────────────────────────────╗
To the extent possible under law, Justine Tunney has waived
all copyright and related or neighboring rights to this file,
as it is written in the following disclaimers:
http://unlicense.org/ │
http://creativecommons.org/publicdomain/zero/1.0/ │
*/
#endif
#include "libc/calls/calls.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/fmt/itoa.h"
#include "libc/str/str.h"
volatile int g_sig;
void OnSig(int sig) {
g_sig = sig;
}
int main(int argc, char *argv[]) {
// listen for all signals
for (int sig = 1; sig <= NSIG; ++sig) {
signal(sig, OnSig);
}
// wait for a signal
char ibuf[12];
FormatInt32(ibuf, getpid());
tinyprint(2, "waiting for signal to be sent to ", ibuf, "\n", NULL);
pause();
// report the signal
tinyprint(1, "got ", strsignal(g_sig), "\n", NULL);
}