30 Jan
2025
30 Jan
'25
10:37 p.m.
On Thu, 30 Jan 2025 20:40:25 +0000 Lorenzo Stoakes lorenzo.stoakes@oracle.com wrote:
If you wish to utilise a pidfd interface to refer to the current process or thread it is rather cumbersome, requiring something like:
int pidfd = pidfd_open(getpid(), 0 or PIDFD_THREAD);
...
close(pidfd);
Or the equivalent call opening /proc/self. It is more convenient to use a sentinel value to indicate to an interface that accepts a pidfd that we simply wish to refer to the current process thread.
The above code sequence doesn't seem at all onerous. I'm not understanding why it's worth altering the kernel to permit this little shortcut?