Nico Weber 526ca68786 SystemMonitor: Correctly check error of posix_spawn() ...

posix_spawn() has a bit of a whacky API in that it doens't return
0 on success and -1 on failure while writing the error code to
errno -- it instead returns 0 on success and the error code on
error.

So assign the return value to errno so that perror() does the
right thing.

2020-07-02 20:34:06 +02:00

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