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#include <sys/syscall.h>
#include <unistd.h>
#include <sys/wait.h>
#include "zdtmtst.h"
const char *test_doc = "Kill child and grandchild process using pidfds\n";
const char *test_author = "Bhavik Sachdev <b.sachdev1904@gmail.com>";
static int pidfd_open(pid_t pid, unsigned int flags)
{
return syscall(__NR_pidfd_open, pid, flags);
}
static int pidfd_send_signal(int pidfd, int sig, siginfo_t* info, unsigned int flags)
{
return syscall(__NR_pidfd_send_signal, pidfd, sig, info, flags);
}
static int wait_for_child(int child)
{
int status;
if (waitpid(child, &status, 0) != child) {
pr_perror("waitpid()");
return 1;
}
if (status != 0) {
test_msg("%d:%d:%d:%d", WIFEXITED(status), WEXITSTATUS(status),
WIFSIGNALED(status), WTERMSIG(status));
}
return 0;
}
int main(int argc, char* argv[])
{
#define READ 0
#define WRITE 1
int child, gchild, cpidfd, gpidfd, gchild_pid, ret;
int p[2];
if (pipe(p)) {
pr_perror("pipe");
return 1;
}
test_init(argc, argv);
child = fork();
if (child < 0) {
pr_perror("fork");
return 1;
}
if (child == 0) {
gchild = fork();
if (gchild < 0) {
pr_perror("fork");
return 1;
}
if (gchild == 0) {
test_waitsig();
return 0;
}
close(p[READ]);
if (write(p[WRITE], &gchild, sizeof(gchild))
!= sizeof(gchild)) {
pr_perror("write");
return 1;
}
close(p[WRITE]);
test_waitsig();
return wait_for_child(gchild);
}
cpidfd = pidfd_open(child, 0);
if (cpidfd < 0) {
pr_perror("pidfd_open");
return 1;
}
close(p[WRITE]);
if (read(p[READ], &gchild_pid, sizeof(gchild_pid))
!= sizeof(gchild_pid)) {
pr_perror("read");
return 1;
}
close(p[READ]);
gpidfd = pidfd_open(gchild_pid, 0);
if (gpidfd < 0) {
pr_perror("pidfd_open");
return 1;
}
test_daemon();
test_waitsig();
if (pidfd_send_signal(gpidfd, SIGKILL, NULL, 0)) {
pr_perror("Could not send signal");
goto fail_close;
}
if (pidfd_send_signal(cpidfd, SIGKILL, NULL, 0)) {
pr_perror("Could not send signal");
goto fail_close;
}
ret = wait_for_child(child);
if (ret)
goto fail_close;
pass();
close(cpidfd);
close(gpidfd);
return 0;
fail_close:
fail();
close(cpidfd);
close(gpidfd);
return 1;
}
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