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License: GNU General Public License v3.0
Small utility to wait for a process to finish
License: GNU General Public License v3.0
Relying on periodic polling is a bad idea in general for a number of reasons:
What makes this particular example especially dangerous is that, once in a while, a new process may appear with the same PID during the 5 seconds between the checks, and your easy_pwait
will never realize it.
The C-code you have does not have any of these problems -- do not devalue it :-)
Modern Linux kernels support pidfd_open() which will result in very simple and very stable implementation if available.
For details, see https://man7.org/linux/man-pages/man2/pidfd_open.2.html
I cannot compile anymore.... there's no such file as sys/capability.h and linux/capability.h doesn't seem to be correct... ?
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