kaguya
75 lines
1.3 KiB
C
75 lines
1.3 KiB
C
#include <assert.h>
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#include <errno.h>
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#include <poll.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/pidfd.h>
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#include <sys/wait.h>
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#include <unistd.h>
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int main() {
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int child = fork();
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if(!child) {
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sleep(1);
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exit(42);
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}
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int pidfd = pidfd_open(child, 0);
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assert(pidfd > 0);
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int ret = lseek(pidfd, 0, SEEK_SET);
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assert(ret == -1);
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assert(errno == ESPIPE);
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pid_t outpid = pidfd_getpid(pidfd);
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assert(outpid == child);
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struct pollfd pollfd;
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pollfd.fd = pidfd;
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pollfd.events = POLLIN;
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int ready = poll(&pollfd, 1, 0);
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assert(ready == 0);
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ready = poll(&pollfd, 1, 2000);
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if(ready == -1) {
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perror("poll");
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exit(EXIT_FAILURE);
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}
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assert(ready == 1);
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assert(pollfd.revents == POLLIN);
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siginfo_t info = {};
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ret = waitid(P_PIDFD, pidfd, &info, WEXITED | WNOHANG);
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assert(ret == 0);
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assert(info.si_code == CLD_EXITED);
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assert(info.si_pid == child);
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assert(info.si_status == 42);
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close(pidfd);
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child = fork();
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if(!child) {
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sleep(10);
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}
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pidfd = pidfd_open(child, 0);
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assert(pidfd > 0);
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ret = pidfd_send_signal(pidfd, SIGKILL, NULL, 0);
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assert(ret == 0);
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memset(&info, 0, sizeof(info));
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ret = waitid(P_PIDFD, pidfd, &info, WEXITED);
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assert(ret == 0);
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assert(info.si_code == CLD_KILLED);
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assert(info.si_pid == child);
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assert(info.si_status == SIGKILL);
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return 0;
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}
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