История изменений

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <setjmp.h>
#include <signal.h>

jmp_buf env;

void on_sigint(int sig) {
        longjmp(env, 1);
}

int main() {
        int fd = open("/dev/null", O_RDONLY);

        signal(SIGINT, on_sigint);

        if (setjmp(env))
                goto clean;

work:
        sleep(3);
        puts("timeout");

clean:
        puts("cleanup");
        close(fd);
}

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <setjmp.h>
#include <signal.h>

jmp_buf env;

void on_sigint(int sig) {
        longjmp(env, 1);
}

int main() {
        int fd = open("/dev/null", O_RDONLY);

        goto clean_setup;

work:
        sleep(3);
        puts("timeout");

        goto clean;

clean_setup:
        if (!setjmp(env)) {
                signal(SIGINT, on_sigint);
                goto work;
        }

clean:
        puts("cleanup");
        close(fd);
}