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Merge pull request #519 from bjornfor/fix-semaphore-deletion

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Only let the owner clean up semaphore and shared memory
This commit is contained in:
Wolfgang Hommel
2025-09-29 20:41:22 +02:00
committed by GitHub
parent 7bfe6566b3 0c76f27777
commit 949b36e6a2
1 changed files with 14 additions and 3 deletions
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17
src/libfaketime.c
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@@ -697,10 +697,21 @@ static void ft_shm_destroy(void)
*/
if (0 == ft_sem_open(sem_name, &ft_sem))
{
ft_sem_unlink(&ft_sem);
// Only delete the semaphore (and shared memory) if we're the owner.
pid_t sem_owner_pid;
int num_matched = sscanf(sem_name, "/faketime_sem_%d", &sem_owner_pid);
if (num_matched != 1)
{
fprintf(stderr, "libfaketime: failed to parse semaphore owner pid from sem_name %s\n", sem_name);
exit(1);
}
if (getpid() == sem_owner_pid)
{
ft_sem_unlink(&ft_sem);
shm_unlink(shm_name);
unsetenv("FAKETIME_SHARED");
}
}
shm_unlink(shm_name);
unsetenv("FAKETIME_SHARED");
}
}